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http://dx.doi.org/10.5515/KJKIEES.2012.23.9.1079

Design of X-Band High Efficiency 60 W SSPA Module with Pulse Width Variation  

Kim, Min-Soo (Department of Information & Communication Engineering, Kyungnam University)
Koo, Ryung-Seo (Defense Agency for Technology and Quality)
Rhee, Young-Chul (Department of Information & Communication Engineering, Kyungnam University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.9, 2012 , pp. 1079-1086 More about this Journal
Abstract
In this paper, X-band 60 W Solid-State Power Amplifier with sequential control circuit and pulse width variation circuit for improve bias of SSPA module was designed. The sequential control circuit operate in regular sequence drain bias switching of GaAs FET. The distortion and efficiency of output signals due to SSPA nonlinear degradation is increased by making operate in regular sequence the drain bias wider than that of RF input signals pulse width if only input signal using pulsed width variation. The GaAs FETs are used for the 60 W SSPA module which is consists of 3-stage modules, pre-amplifier stage, driver-amplifier stage and main-power amplifier stage. The main power amplifier stage is implemented with the power combiner, as a balanced amplifier structure, to obtain the power greater than 60 W. The designed SSPA modules has 50 dB gain, pulse period 1 msec, pulse width 100 us, 10 % duty cycle and 60 watts output power in the frequency range of 9.2~9.6 GHz and it can be applied to solid-state pulse compression radar using pulse SSPA.
Keywords
Pulsed SSPA; X-band; Radar System; VEPG; High Efficiency;
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