DC power supply to drive W-band gyrotron travelling wave amplifier for satellite uplink and wireless communication applications

Lead Research Organisation: University of Strathclyde
Department Name: Physics

Abstract

The backbone network in future telecommunication systems will move from copper and fibre to mm-wave wireless connections, allowing rapid deployment, mesh-like connectivity with fast data rates of tens of gigabits per second for future mobile applications such as cloud computing, big data, virtual reality and the Internet of Things. The main restriction in the uptake of mm-wave wireless mobile communications is the challenge in forming the mm-wave backhaul links due to the lack of high power (kilo-watt) wideband mm-wave amplifiers.

The gyro-amplifiers developed under STFC IPS Project (ST/P001890/1) offers a unique opportunity to fill a long standing gap in the generation of high power coherent millimetre wave radiation with its amplification with an unprecedented 6% instantaneous bandwidth and an unrivalled power of 3.4kW at 93 GHz. For satellite communications the gyro-TWA has the power at W-band frequencies to overcome attenuation due to rain and moisture in the atmosphere while possessing sufficient bandwidth (6%) for high data rate transmission to multiple satellites.

Building on the recent success of W. He, C. R. Donaldson, L. Zhang et al PRL 2017, 119 no. 18, p. 184801, and L. Zhang, C. R. Donaldson et al IEEE Electron Device Letters 2018, vol. 39, no. 7, pp. 1077-1080 where short pulse (sub-microsecond) 93GHz gyro-TWA operation was demonstrated the procurement of a 60kV, 1.2A DC power supply is required to enable continuous wave gyro-TWA operation which will result in a paradigm shift in what is achievable for ground based, cellular telecommunications networks and satellite communications.

Publications

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Title Data for STFC project: "DC power supply to drive W-band gyrotron travelling wave amplifier for satellite uplink and wireless telecommunication applications" 
Description The data contains the specifications of the power supply that the vendor designed for the application. 
Type Of Material Database/Collection of data 
Year Produced 2020 
Provided To Others? Yes  
URL https://pureportal.strath.ac.uk/en/datasets/9001fb65-2b0f-4415-b8cb-89049665a1fc
 
Description Defence and Security Accelerator 1: High power, wideband millimetre wave source for space object identification 
Organisation Defence Science & Technology Laboratory (DSTL)
Country United Kingdom 
Sector Public 
PI Contribution The procurement and delivery of a high voltage, DC powersuply from GenVolt Ltd has ensured the previous low duty cycle (one pulse per second) hgh power 3.4kW, high ganin 37dB, broadband (10%) gyrotron travelleing wave amplifier operating at a centre frequency of 94GHz was capable of operating at high (kHz) pulse repetition frequencies
Collaborator Contribution The high voltage DC power supply has enable a key sub-system to be in place resulting in DASA project managers from DSTL specifying the power, frequency, gain and bandwidth of a high power amplifier to be used for a ground-based imaging of objects in low earth orbit. Strathclydes' world leading amplifier is to be used in conjunction with a ground based antenna that is being specified by a collaborating group at the University of St. Andrews with the industrial partner TMD Ltd involved in industrializing the Strathclyde amplifier.
Impact A strong consortium has been built with 3 partners, Strathclyde the design authority of the gryroton travelling wave amplifier, a group at School of Physics and Astronomy University of St. Andrews the design authority f the antenna and TMD Ltd the industrial partner whose job is to industrialise the system
Start Year 2019