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Zhang, Liang and Whyte, Colin G. and Donaldson, Craig R. and Ronald, Kevin and Cross, Adrian W. (2024) Feedhorn synthesis using a parameterized aperture field distribution. IEEE Electron Device Letters, 45 (2). pp. 252-255. ISSN 0741-3106

Zhang, Liang and Donaldson, Craig R. and Robertson, Craig W. and Whyte, Colin G. and Cross, Adrian W. and Clarke, Jim; (2022) Microwave undulator to generate short-wavelength FEL radiation. In: 2022 15th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT). 2022 15th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies (UCMMT) . IEEE, NOR, pp. 1-3. ISBN 9781665493109

Zhang, Liang and Donaldson, Craig R. and Whyte, Colin G. and Cross, Adrian W.; (2022) Status and ongoing development of a KW-level broadband W-band gyro-TWA. In: 2021 51st European Microwave Conference. IEEE, GBR, pp. 1042-1045. ISBN 9782874870637

Zhang, Liang and Easton, Jack and Donaldson, Craig R. and Whyte, Colin G. and Cross, Adrian W. (2022) Dispersion curve of the helically corrugated waveguide based on helicoidal coordinate transform. IEEE Transactions on Electron Devices, 69 (6). 3427 - 3432. ISSN 0018-9383

Zhang, Liang and Donaldson, Craig R. and Clarke, Jim and Easton, Jack and Robertson, Craig W. and Whyte, Colin G. and Cross, Adrian W. (2022) Beam dynamic study of a Ka-band microwave undulator and its potential drive sources. Scientific Reports, 12. 7071. ISSN 2045-2322

MacInnes, Philip and Donaldson, Craig R. and Whyte, Colin G. and MacLachlan, Amy J. and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W. (2022) Numerical analysis of high-power X-band sources, at low magnetic confinement, for use in a multi-source array. IEEE Transactions on Electron Devices, 69 (1). pp. 340-346. ISSN 0018-9383

Donaldson, Craig R. and Zhang, Liang and Hiscock, Peter and Harris, Michael and Beardsley, Matthew J. and Huggard, Peter G. and Whyte, Colin G. and Cross, Adrian W. and He, Wenlong (2021) Fivefold helically corrugated waveguide for high-power w-band gyro-devices and pulse compression. IEEE Transactions on Electron Devices. pp. 1-6. ISSN 0018-9383

MacInnes, Philip and Donaldson, Craig R. and MacLachlan, Amy J. and Whyte, Colin G. and Ronald, K. and Phelps, Alan D. R. and Cross, Adrian W.; (2021) Phase locked high power X-band microwave sources. In: 2021 IEEE International Conference on Plasma Science (ICOPS), 2021. IEEE International Conference on Plasma Science (ICOPS) . IEEE, USA. ISBN 9781665432276

Young, Alan and Whyte, Colin and Robertson, Craig and MacInnes, Philip and Phelps, Alan and Cross, Adrian and Zhang, Liang and Donaldson, Craig and Matheson, Kathleen and Ronald, Kevin; (2021) Wideband amplification of transient signals for application in pulse compression. In: 2021 IEEE International Conference on Plasma Science (ICOPS) 2021. IEEE International Conference on Plasma Science (ICOPS) . IEEE, USA. ISBN 9781665432276

Donaldson, Craig R. and Zhang, Liang and Harris, Michael and Beardsley, Matthew J. and Huggard, Peter G. and Whyte, Colin G. and Cross, Adrian W. and He, Wenlong (2021) 8-fold helically corrugated interaction region for high power gyroresonant THz sources. IEEE Electron Device Letters, 42 (10). pp. 1544-1547. ISSN 0741-3106

Donaldson, Craig R. and Zhang, Liang and He, Wenlong and Cross, Adrian W. and Ronald, Kevin and Whyte, Colin G. (2021) Low loss transmission line for a 3.4-kW, 93-GHz gyro-traveling-wave amplifier. IEEE Transactions on Electron Devices, 68 (1). pp. 364-368. ISSN 0018-9383

He, W. and Zhang, L. and Donaldson, C. R. and Yin, H. and Ronald, K. and Cross, A. W. and Phelps, A. D. R. (2020) The development of broadband millimeter-wave and terahertz gyro-TWA. Terahertz Science & Technology, 13 (3). pp. 90-110. ISSN 1941-7411

Nix, L. J. R. and Zhang, L. and He, W. and Donaldson, C. R. and Ronald, K. and Cross, A. W. and Whyte, C. G. (2020) Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier. Physics of Plasmas, 27 (5). 053101. ISSN 1070-664X

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Clarke, Jim and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W. (2019) Coupling structure for a high Q corrugated cavity as a microwave undulator. IEEE Transactions on Electron Devices, 66 (10). pp. 4392-4397. ISSN 0018-9383

Zhang, Liang and Donaldson, Craig R. and He, Wenlong and Phelps, Alan D. R. and Cross, Adrian W.; (2019) Cusp electron gun with modulation electrode for a THz gyro-amplifier. In: 44th International Conference on Infrared, Millimeter, and Terahertz Waves. IEEE, FRA. ISBN 9781538682852

Donaldson, Craig R. and Zhang, Liang and Cross, Adrian W. and Ronald, Kevin and Phelps, Alan D.R. and He, Wenlong; (2019) 0.37 THz gyro-TWA with a cryo-free SCM : design and simulation. In: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, FRA. ISBN 9781538682852

Zhang, Liang and Donaldson, Craig R. and He, Wenlong and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W. (2019) Design and simulation of a 0.37 THz gyro-TWA. In: 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), 2019-08-20 - 2019-08-22, Queen Mary University of London.

Zhang, Liang and Donaldson, Craig R. and He, Wenlong and Phelps, Alan D. R. and Ronald, Kevin and Cross, Adrian W. (2019) Gridded cusp gun for a terahertz gyro-amplifier. In: 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019), 2019-08-20 - 2019-08-22, Queen Mary University of London.

Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and He, Wenlong; (2019) Measurement of a broadband input coupler for a W-band gyro-TWA. In: 2019 International Vacuum Electronics Conference (IVEC). IEEE, KOR. ISBN 978-1-5386-7534-2

Donaldson, Craig R. and Zhang, Liang and He, Wenlong; (2019) Output coupler for a THz gyro-amplifier. In: 2019 International Vacuum Electronics Conference (IVEC). IEEE, KOR. ISBN 978-1-5386-7534-2

Cross, A. W. and MacLachlan, A. J. and Robertson, C. W. and Zhang, L. and Donaldson, C. R. and Yin, H. and Phelps, A. D. R. and Ronald, K.; (2019) Oversized W-band 2D periodic lattice oscillator. In: 2019 International Vacuum Electronics Conference (IVEC). IEEE, KOR. ISBN 978-1-5386-7534-2

He, Wenlong and Zhang, Liang and Donaldson, Craig R. and Ronald, Kevin and Phelps, Alan D.R. and Cross, Adrian W. and Cain, Peter (2019) Characteristic measurements of a wideband gyro-TWA operating in W-band. In: 20th International Vacuum Electronics Conference (IVEC 2019), 2019-04-28 - 2019-05-01, Paradise Hotel.

He, W. and Donaldson, C. R. and Zhang, L. and Cain, P. and Yin, H. and Ronald, K. and Cross, A. W. and Phelps, A. D. R.; (2018) Amplification of W-band multi-frequency signals using a gyro-TWA. In: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, JPN. ISBN 9781538638095

Donaldson, Craig R. and Zhang, Liang and He, Wenlong; (2018) Broadband output windows for THz gyro-TWAs. In: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, JPN. ISBN 9781538638095

Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and Phelps, Alan D. R. and He, Wenlong; (2018) Design of a gridded cusp gun for a W-band gyro-TWA. In: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, JPN. ISBN 9781538638095

Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and He, Wenlong and Cain, Peter (2018) Measurement of W-band gyro-TWA with wide bandwidth input signal. In: 11th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, 2018-09-05 - 2018-09-07, Hangzhou Dianzi University Science & Technology Museum.

Zhang, Liang and Donaldson, Craig R. and Cain, Peter and Cross, Adrian W. and He, Wenlong (2018) Amplification of frequency-swept signals in a W-band gyrotron travelling wave amplifier. IEEE Electron Device Letters. pp. 1-4. ISSN 0741-3106 (In Press)

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Cross, Adrian W. (2018) Investigation on the optimal magnetic field of a cusp electron gun for a W-band gyro-TWA. Physics of Plasmas. pp. 1-6. ISSN 1070-664X

Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and He, Wenlong (2018) A pillbox window with impedance matching sections for a W-band gyro-TWA. IEEE Electron Device Letters. ISSN 0741-3106

Zhang, Liang and Donaldson, Craig R. and He, Wenlong (2018) Optimization of a triode-type cusp electron gun for a W-band gyro-TWA. Physics of Plasmas, 25 (4). 043120. ISSN 1070-664X

Zhang, Liang and Donaldson, Craig R. and Garner, Jason and Cross, Adrian W. and He, Wenlong (2018) Input coupling systems for millimetre-wave gyrotron travelling wave amplifiers. IET Microwaves, Antennas & Propagation. pp. 1-4. ISSN 1751-8725

Donaldson, Craig R. and Zhang, Liang and Beardsley, Mat and Harris, Michael and Hugard, Peter G. and He, Wenlong (2018) CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier. IEEE Transactions on Terahertz Science & Technology, 8 (1). pp. 85-89. ISSN 2156-3446

Zhang, Liang and Garner, Jason and Donaldson, Craig R. and He, Wenlong and Phelps, Alan D. R. and Cross, Adrian W.; (2017) Design of a TE10-to-TE61 mode coupler for a 372 GHz gyrotron travelling wave amplifier. In: 2017 47th European Microwave Conference (EuMC). IEEE, DEU, pp. 568-571. ISBN 9782874870477

He, W. and Donaldson, C. R. and Zhang, L. and Ronald, K. and Phelps, A. D. R. and Cross, A. W. (2017) Broadband amplification of low-terahertz signals using axis-encircling electrons in a helically corrugated interaction region. Physical Review Letters, 119 (18). 184801. ISSN 1079-7114

He, Wenlong and Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and Phelps, Alan D. R.; (2017) Demonstration of a high power broadband mm-wave gyro-TWA. In: 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2017. IEEE, GBR. ISBN 9781538627204

Zhang, Liang and Donaldson, Craig R. and Garner, Jason and Cross, Adrian W. and He, Wenlong; (2017) Input coupling systems for mm-wave amplifiers. In: 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT). IEEE, GBR. ISBN 9781538627204

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Cross, Adrian W. and Smith, Graham M. and Robertson, Duncan A. and Hunter, Robert I.; (2017) Smoothly profiled quasi-optical output launcher for a W-band gyro-TWA. In: 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT). IEEE, GBR. ISBN 9781538627204

Liu, Hairui and Viegas, Colin and Powell, Jeff and Sangera, Hosh and Whimster, Andrew and Wang, Hui and He, Wenlong and Donaldson, Craig and Huggard, Peter G. and Alderman, Bryon; (2017) A high-power Schottky diode frequency multiplier chain at 360 GHz for Gyro-TWA applications. In: 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT). IEEE, Piscataway, NJ., pp. 1-2. ISBN 9781538627204

Donaldson, Craig R. and McElhinney, Paul and Zhang, Liang and Cross, Adrian W. and He, Wenlong; (2017) Performance measurements of mode-converting corrugated horns. In: 2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies, UCMMT 2017. IEEE, GBR. ISBN 9781538627204

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Yin, H. and Garner, J. and Ronald, K. and Cross, A. W. and Phelps, A. D.R.; (2017) Design and experiment of a broadband W-band gyro-TWA based on a helically corrugated interaction region. In: 2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2017. IEEE, MEX. ISBN 9781509060481

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Smith, Graham M. and Robertson, Duncan A. and Hunter, Robert I. and Cross, Adrian W. (2017) Optimization and measurement of a smoothly profiled horn for a W-band gyro-TWA. IEEE Transactions on Electron Devices. pp. 1-6. ISSN 0018-9383

Donaldson, Craig R. and Zhang, Liang and Cross, Adrian W. and He, Wenlong (2017) Design of a multilayer output window for a 372 GHz gyro-TWA. In: 18th International Vacuum Electronics Conference, IVEC 2017, 2017-04-24 - 2017-04-26, London.

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Garner, J. and Ronald, K. and Cross, A. W. and Phelps, A. D. R. (2017) Measurement of a W-band gyro-TWA experiment based on a helically corrugated interaction region. In: 18th International Vacuum Electronics Conference, IVEC 2017, 2017-04-24 - 2017-04-26, London.

Donaldson, Craig R. and McElhinney, Paul and Zhang, Liang and He, Wenlong (2017) Measurement of a W-band output launcher system for a broadband gyro-TWA. In: 18th International Vacuum Electronics Conference, IVEC 2017, 2017-04-24 - 2017-04-26, London.

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Garner, Jason and Cross, Adrian W. (2017) Measurement of an upgraded input coupling system for W-band gyro-TWA. In: 18th International Vacuum Electronics Conference, IVEC 2017, 2017-04-24 - 2017-04-26, London.

Zhang, Liang and Garner, Jason and He, Wenlong and Donaldson, Craig R. and Cross, Adrian W. (2017) A multiple-hole input coupler for a 372 GHz gyro-travelling wave amplifier. In: 18th International Vacuum Electronics Conference, IVEC 2017, 2017-04-24 - 2017-04-26, London.

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Cross, Adrian W. and Robertson, Duncan and Hunter, Robert and Smith, Graham; (2017) Design of a spline horn for a W-band gyro-TWA. In: 2016 IEEE 9th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT). Institute of Electrical and Electronics Engineers Inc., CHN. ISBN 9781509022779

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Yin, H. and Garner, J. R. and Ronald, K. and Cross, A. W. and Phelps, A. D. R.; (2017) Development of high power broadband gyro-TWAs towards the terahertz range. In: 2016 IEEE 9th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT). IEEE, CHN, pp. 15-17. ISBN 9781509022755

McElhinney, Paul and Donaldson, Craig R. and McKay, Johannes E. and Zhang, Liang and Robertson, Duncan A. and Hunter, Robert I. and Smith, Graham M. and He, Wenlong and Cross, Adrian W. (2017) An output coupler for a W-band high power wideband gyro-amplifier. IEEE Transactions on Electron Devices. ISSN 0018-9383

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Yin, H. and Garner, J. and Ronald, K. and Cross, A. W. and Phelps, A. D R; (2016) High pulse repetition frequency operation of a W-band Gyro-TWA based on a cusp electron beam source. In: 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves . IEEE Computer Society Press, DNK. ISBN 9781467384858

Donaldson, Craig R. and McElhinney, Paul and Zhang, Liang and He, Wenlong; (2016) Measurement of a broadband millimeter wave window for application in vacuum tubes. In: 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves . IEEE, DNK. ISBN 9781467384865

Zhang, Liang and McElhinney, Paul and Donaldson, Craig R. and He, Wenlong and Phelps, Alan D. R. and Cross, Adrian W.; (2016) Measurement of a high Gaussian-content corrugated horn for a W-band gyro-TWA. In: 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves . IEEE Computer Society Press, DNK. ISBN 9781467384858

Garner, J. R. and Zhang, L. and Donaldson, C. R. and Cross, A. W. and Phelps, A. D. R. and He, W.; (2016) Simulation of rectangular TE10 to circular TE11 terahertz mode converters. In: 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves . IEEE Computer Society Press, DNK. ISBN 9781467384858

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Yin, H. and Garner, J. R. and Ronald, K. and Cross, A. W. and Phelps, A. D.R.; (2016) Experimental test of a W-band gyro-TWA for cloud radar applications. In: 2016 46th European Microwave Conference (EuMC). IEEE, GBR, pp. 1099-1102. ISBN 9782874870439

Zhang, Liang and He, Wenlong and Donaldson, Craig and Cross, Adrian (2016) Bandwidth study of the microwave reflectors with rectangular corrugations. Journal of Infrared, Millimeter and Terahertz Waves, 37. pp. 846-856. ISSN 1866-6906

Garner, Jason R. and Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and He, Wenlong (2016) Design study of a 372 GHz higher order mode input coupler. IEEE Transactions on Electron Devices, 63 (8). pp. 3284-3290. ISSN 0018-9383

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Yin, H. and Garner, J. R. and Ronald, K. and Cross, A. W. and Phelps, A. D.R.; (2016) Upgrade of a W-band gyro-TWA for cloud radar application. In: IET Colloquium on Millimetre-Wave and Terahertz Engineering & Technology 2016. IET, GBR. ISBN 978-1-78561-222-0

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Garner, J. and Ronald, K. and Cross, A. W. and Phelps, A. D. R.; (2016) Developments of a W-band gyro-TWA for high PRF operation. In: 2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop, UCMMT 2015. Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781467374347

Garner, Jason R. and Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and He, Wenlong; (2016) TE10 R-TE11c input coupler for a low-THz gyro-TWA. In: 2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop, UCMMT 2015. Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781467374347

Zhang, Liang and Zhang, Yanyan and He, Wenlong and Donaldson, Craig R. and McElhinney, Paul and Phelps, Alan D. R. and Cross, Adrian W.; (2016) W-band Brewster window for a wideband gyro-TWA. In: 2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop, UCMMT 2015. Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781467374347

Donaldson, C. R. and McElhinney, P. and Zhang, L. and He, W.; (2016) Multilayer microwave windows for wideband gyro-amplifiers. In: 2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop, UCMMT 2015. Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781467374347

McElhinney, Paul and Donaldson, Craig R. and Zhang, Liang and Cross, Adrian W. and He, Wenlong; (2016) A corrugated horn with broadband window for W-band gyro-devices. In: 2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop, UCMMT 2015. Institute of Electrical and Electronics Engineers Inc., GBR. ISBN 9781467374347

Garner, Jason R. and Zhang, Liang and Donaldson, Craig R. and Cross, Adrian W. and He, Wenlong (2016) Design study of a fundamental mode input coupler for a 372-GHz gyro-TWA I : rectangular-to-circular coupling methods. IEEE Transactions on Electron Devices, 63 (1). pp. 497-503. ISSN 0018-9383

Donaldson, Craig R. and McElhinney, Paul and Zhang, Liang and He, Wenlong (2016) Wide-band HE11 mode terahertz wave windows for gyro-amplifiers. IEEE Transactions on Terahertz Science & Technology, 6 (1). pp. 108-112. ISSN 2156-3446

Zhang, Yanyan and Zhang, Liang and He, Wenlong and Donaldson, Craig R. and McElhinney, Paul and Phelps, Alan D. R. and Cross, Adrian W. (2015) Design and measurement of a W-band Brewster window. IEEE Microwave and Wireless Components Letters, 25 (12). pp. 826-828. ISSN 1531-1309

Donaldson, C. R. and McElhinney, P. and Zhang, L. and Yin, H. and Cross, A. W. and He, W.; (2015) A wide-band HE11 mode window for millimeter wave gyro-TWAs. In: IRMMW-THz 2015. IEEE, CHN, pp. 1-2. ISBN 9781479982721

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Yin, H. and Garner, J. and Ronald, K. and Cross, A. W. and Phelps, A. D. R.; (2015) Further experiments of a W-band gyro-TWA based on a helically corrugated interaction region. In: 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). IEEE, CHN, pp. 1-2. ISBN 9781479982721

McElhinney, Paul and Donaldson, Craig R. and Zhang, Liang and Cross, Adrian W. and Yin, Huabi and He, Wenlong; (2015) A W-band corrugated output horn and window for gyro-devices. In: IRMMW-THz 2015. IEEE, CHN. ISBN 9781479982721

Anderson, Julie C. and Joudan, Shira and Shoichet, Eira and Cuscito, Leah D. and Alipio, Ayana E.C. and Donaldson, Craig S. and Khan, Sadia and Goltz, Douglas M. and Rudy, Martina D. and Frank, Richard A. and Knapp, Charles W. and Hanson, Mark L. and Wong, Charles S. (2015) Reducing nutrients, organic micropollutants, antibiotic resistance, and toxicity in rural wastewater effluent with subsurface filtration treatment technology. Ecological Engineering, 84. pp. 375-385. ISSN 0925-8574

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Garner, Jason R. and McElhinney, Paul and Cross, Adrian W. (2015) Design and measurement of a broadband sidewall coupler for a W-band gyro-TWA. IEEE Transactions on Microwave Theory and Techniques, 63 (10). pp. 3183-3190. ISSN 0018-9480

He, W and Yin, H and Bowes, D and Zhang, L and Donaldson, CR and Ronald, K and Phelps, ADR and Cross, AW (2015) Experimental results from backward wave oscillators driven by a pseudospark-generated electron beam. In: XXXII International Conference on Phenomena in Ionized Gasses ICPIG 2015, 2015-07-26 - 2015-07-31, University of Iași.

Donaldson, CR and Zhang, L and He, W and McElhinney, P and Ronald, K and Cross, AW and Phelps, ADR; (2015) High power W-band gyro-BWO experiments. In: IEEE International Conference on Plasma Science (ICOPS) 2015. IEEE, TUR. ISBN 9781479969746

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Ronald, K. and Cross, A. W. and Phelps, A. D. R.; (2015) Latest development of a W-band Gyro-TWA based on a helically corrugated interaction region. In: IEEE International Vacuum Electronics Conference (IVEC), 2015. IEEE, CHN, pp. 1-2. ISBN 9781479971107

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Phelps, A. D R and Ronald, K. and Cross, A. W.; (2014) A W-band gyrotron traveling wave amplifier experiment. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. IEEE, USA. ISBN 9781479938773

McElhinney, P. and Donaldson, C. R. and Zhang, L. and Cross, A. W. and He, W.; (2014) W-band quasi-optical mode converters for gyro-devices. In: 2nd IET Annual Active and Passive RF Devices Seminar. Institution of Engineering and Technology, GBR, pp. 4-7. ISBN 9781849199728

Donaldson, C.R. and Zhang, L. and Cross, A.W. and Phelps, A.D.R. and Ronald, K. and He, W.; (2014) A cusp electron gun for millimeter wave gyro-devices. In: 2nd IET Annual Active and Passive RF Devices Seminar. Institution of Engineering and Technology, GBR, pp. 3-4. ISBN 978-1-84919-972-8

Zhang, L. and He, W. and Donaldson, C. R. and McElhinney, P. and Ronald, K. and Phelps, A. D. R. and Cross, A. W.; (2014) Design and tests of a W-band gyro-TWA and its components. In: 2nd IET Annual Active and Passive RF Devices Seminar. Institution of Engineering and Technology, GBR, pp. 7-9. ISBN 9781849199728

He, W. and Donaldson, C.R. and Zhang, L. and McElhinney, P. and Ronald, K. and Cross, A.W.; (2013) W-band gyro-TWA using a cusp electron gun and a helically corrugated interaction region. In: 2013 IEEE 14th International Vacuum Electronics Conference (IVEC 2013). IEEE, FRA, pp. 1-2. ISBN 9781467359764

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Ronald, Kevin and McElhinney, Paul and Cross, Adrian W.; (2013) An input coupler for a W-band gyro-TWA. In: 2013 6th UK, Europe, China Millimeter Waves and THz Technology Workshop (UCMMT). IEEE, ITA, pp. 1-2. ISBN 9781479909834

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Phelps, A. D. R. and Ronald, K. and Cross, A. W.; (2013) Latest experiments of W-band gyro-BWO using helically corrugated waveguides. In: 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, DEU. ISBN 9781467347174

Donaldson, C.R. and He, Wenlong and Zhang, Liang and Cross, A.W. (2013) A W-band multi-layer microwave window for pulsed operation of gyro-devices. IEEE Microwave and Wireless Components Letters, 23 (5). pp. 237-239.

He, Wenlong and Donaldson, Craig and Zhang, Liang and Ronald, Kevin and McElhinney, Paul and Cross, Adrian (2013) High power wideband gyrotron backward wave oscillator operating towards the terahertz region. Physical Review Letters, 110 (16). 165101. ISSN 1079-7114

McElhinney, Paul and Donaldson, Craig R. and Zhang, Liang and He, Wenlong (2013) A high directivity broadband corrugated horn for W-band gyro-devices. IEEE Transactions on Antennas and Propagation, 61 (3). pp. 1453-1456. ISSN 0018-926X

He, W. and Donaldson, C. R. and Zhang, L. and McElhinney, P. and Ronald, K. and Cross, A. W. and Phelps, A. D R; (2013) Latest developments on a W-band gyro-TWA. In: UCMMT 2013 - 2013 6th UK, Europe, China Millimeter Waves and THz Technology Workshop. IEEE Computer Society Press, ITA. ISBN 9781479909810

Donaldson, Craig R. and He, Wenlong and Zhang, Liang and Ronald, Kevin and Cross, Adrian W.; (2013) Microwave windows for W-band gyro-devices. In: UCMMT 2013 - 2013 6th UK, Europe, China Millimeter Waves and THz Technology Workshop. IEEE Computer Society Press, ITA. ISBN 9781479909810

Donaldson, C. R. and He, W. and Zhang, L. and McElhinney, P. and Ronald, K. and Cross, A. W.; (2013) A W-band gyrotron traveling wave amplifier. In: 1st Annual Active and Passive RF Devices Seminar. Institution of Engineering and Technology, GBR, pp. 51-53. ISBN 9781849197939

He, W. and Donaldson, C.R. and Zhang, L. and McElhinney, P. and Phelps, A.D.R. and Ronald, K. and Cross, A.W.; (2012) W-band gyro-devices using cusp electron gun and helically corrugated interaction region. In: 2012 37th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, AUT, pp. 1-3. ISBN 978-1-4673-1598-2

Zhang, Liang and Donaldson, Craig and He, Wenlong (2012) Design and measurement of a polarization convertor based on truncated circular waveguide. Journal of Physics D: Applied Physics, 45 (34). 345103. ISSN 1361-6463

McElhinney, Paul and Donaldson, Craig R. and He, Wenlong and Zhang, Liang and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W.; (2012) A broadband corrugated horn for a W-band gyro-TWA. In: IVEC 2012. IEEE, Piscataway, NJ.. ISBN 9781467301886

Donaldson, Craig R. and He, Wenlong and Zhang, Liang and Cross, Adrian W. and Li, Fengping and Phelps, Alan D.R. and Ronald, Kevin and Robertson, Craig W. and Whyte, Colin G. and McElhinney, P.; (2012) Updates on a W-band Gyro-BWO using a helically corrugated waveguide experiment. In: 2012 IEEE Thirteenth International Vacuum Electronics Conference (IVEC). IEEE, USA, 217 - 218. ISBN 978-1-4673-0188-6

Zhang, Liang and Cross, Adrian and He, Wenlong and Robertson, Craig and Young, Alan and Whyte, Colin and Ronald, Kevin and MacInnes, Philip and Donaldson, Craig and Phelps, Alan; (2012) The dispersion characteristics of helically corrugated waveguide. In: Proceedings of the IEEE Thirteenth International Vacuum Electronics Conference (IVEC), 2012. IEEE, USA, pp. 201-202. ISBN 978-1-4673-0188-6

Zhang, Liang and He, Wenlong and Ronald, Kevin and Phelps, Alan D. R. and Whyte, Colin G. and Robertson, Craig W. and Young, Alan R. and Donaldson, Craig R. and Cross, Adrian W. (2012) Multi-mode coupling wave theory for helically corrugated waveguide. IEEE Transactions on Microwave Theory and Techniques, 60 (1). pp. 1-7. ISSN 0018-9480

He, Wenlong and Donaldson, C. R. and Zhang, Liang and McElhinney, P. and Ronald, K. and Phelps, A. and Whyte, C. and Cross, A. W.; (2012) W-band Gyro-TWA experiment using a helically corrugated waveguide. In: 2012 IEEE Thirteenth International Vacuum Electronics Conference (IVEC). IEEE, USA, pp. 417-418. ISBN 9781467301886

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Cross, Adrian W. and Phelps, Alan D. R. and McElhinney, Paul and Ronald, Kevin (2011) W-band gyro-BWO with a four-stage depressed collector. Terahertz Science & Technology, 4 (3). pp. 76-84.

He, Wenlong and Donaldson, Craig R. and Zhang, Liang and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W.; Awrejcewicz, Jan, ed. (2011) Numerical Simulation of a Gyro-BWO with a Helically Corrugated Interaction Region, Cusp Electron Gun and Depressed Collector. In: Numerical Simulations of Physical and Engineering Processes. InTech, pp. 101-132. ISBN 9789535144274

He, W. and Donaldson, C. R. and Li, F. and Zhang, L. and Cross, A. W. and Phelps, A. D. R. and Ronald, K. and Robertson, C. W. and Whyte, C. G. and Young, A. R. (2011) W-band gyro-devices using helically corrugated waveguide and cusp gun : design, simulation and experiment. Terahertz Science & Technology, 4 (1). pp. 9-19.

Zhang, Liang and He, Wenlong and Cross, Adrian W. and Phelps, Alan D. R. and Donaldson, Craig and Ronald, Kevin; (2010) Simulation of a four-stage depressed collector for a W-band gyro-BWO. In: 2010 35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz). IEEE, ITA, pp. 1-2. ISBN 978-1-4244-6657-3

Donaldson, C. R. and He, W. and Cross, A.W. and Li, Fengping and Phelps, A.D.R. and Zhang, Liang and Ronald, Kevin and Robertson, Craig and Whyte, Colin and Young, Alan (2010) A cusp electron gun for millimeter wave gyrodevices. Applied Physics Letters, 96 (14). 141501. ISSN 0003-6951

Li, Fengping and He, W. and Cross, A.W. and Donaldson, C.R. and Zhang, Liang and Phelps, A.D.R. and Ronald, Kevin, Faraday Partnership in High Power RF (Funder), Scottish Universities Physics Alliance (SUPA) (Funder), Overseas Research Students Awards Scheme (ORSAS) (Funder) (2010) Design and simulation of a 390 GHz seventh harmonic gyrotron using a large orbit electron beam. Journal of Physics D: Applied Physics, 43 (15). p. 155204. ISSN 1361-6463

Donaldson, C. R. and He, W. and Phelps, A. D. R. and Li, F. and Zhang, L. and Cross, A. W. and Ronald, K. and Robertson, C. W. and Whyte, C. G. and Young, A. R. (2010) Experimental demonstration of a W-band gyro-BWO using a helically corrugated waveguide. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, 2010-09-05 - 2010-09-10.

He, W. and Phelps, A. D. R. and Donaldson, C. R. and Cross, A. W. and Zhang, L. and Ronald, K. (2010) A W-band gyro-TWA using a helically corrugated waveguide. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, 2010-09-05 - 2010-09-10.

Li, F. and He, W. and Phelps, A. D. R. and Donaldson, C. R. and Zhang, L. and Cross, A. W. and Ronald, K. (2010) The design of a 390 GHz gyrotron based on a cusp electron gun. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, 2010-09-05 - 2010-09-10.

Donaldson, Craig and He, Wenlong and Cross, A.W. and Phelps, A.D.R. and Li, Fengping and Ronald, K. and Robertson, C.W. and Whyte, C.G. and Young, A.R. (2009) Design and numerical optimization of a cusp-gun-based electron beam for millimeter-wave gyro-devices. IEEE Transactions on Plasma Science, 37 (11). pp. 2153-2157. ISSN 1939-9375

He, Wenlong and Donaldson, Craig and Li, Fengping and Cross, Adrian and Phelps, Alan and Ronald, Kevin (2009) Design, simulation and experiment of a cusp electron beam for millimeter wave gyro-devices. In: IEEE International Vacuum Electronics Conference, 2008, 2008-04-22 - 2008-04-24.

Li, Fengping and He, W. and Phelps, A.D.R. and Cross, A.W. and Donaldson, C. R. and Ronald, K.; (2008) The design of a 390 GHz gyrotron based on a cusp electron gun. In: 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008. IEEE, New York, pp. 167-168. ISBN 9781424421190

Donaldson, C. R. and He, W. and Phelps, A.D.R. and Li, F.P. and Cross, A.W. and Ronald, K.; (2008) A similar to 10kW W-Band Gyro-BWO using a Helically Corrugated Waveguide. In: : 33rd International Conference on Infrared, Millimeter and Terahertz Waves. IEEE, Pasedena, California., pp. 201-202. ISBN 978-1-4244-2119-0

He, Wenlong and Phelps, A.D.R. and Donaldson, C. R. and Cross, A.W. and Ronald, Kevin (2007) A W-band Gyro-BWO based on helically corrugated waveguide. In: Joint 32nd International Conference on Infrared and Millimeter Waves/15th International Conference on Terahertz Electronics, 2007-09-03 - 2007-09-09.

Howe, C.J. and Tolmie, A.K. and Thurston, A. and Topping, K. and Christie, D. and Livingston, K. and Jessiman, E.K. and Donaldson, C. (2007) Group work in elementary science: towards organisational principles for supporting pupil learning. International Journal of Educational Research, 17 (5). pp. 549-563. ISSN 0883-0355

He, Wenlong and Phelps, Alan and Donaldson, Craig and Cross, Adrian and Ronald, Kevin; (2007) The design and simulation of a W-band Gyro-BWO. In: Eighth IEEE international vacuum electronics conference. IEEE International Vacuum Electronics Conference IVEC . IEEE, JPN, pp. 231-232. ISBN 9781424406333

Donaldson, Craig and He, Wenlong and Phelps, Alan and Cross, Adrian and Ronald, Kevin; (2007) The design and simulation of a cusp electron beam source for a W-band Gyro-BWO experiment. In: Eighth IEEE international vacuum electronics conference. IEEE International Vacuum Electronics Conference IVEC . IEEE, JPN, pp. 273-274. ISBN 9781424406333

He, Wenlong and Donaldson, Craig and Phelps, Alan and Cross, Adrian and Ronald, Kevin; Shen, XC and Lu, W and Zhang, J and Dou, WB, eds. (2006) W-band Gyro-BWO based on a helically corrugated waveguide. In: Conference digest of the 2006 joint 31st international conference on infrared and millimeter waves and 14th international conference on terahertz electronics. IEEE, CHN, p. 88. ISBN 9781424403998