Fast Switched-Stub Impedance Tuner Reconfiguration for Frequency and Beam Agile Radar and Electronic Warfare Applications
2020 IEEE International Radar Conference (RADAR)(2020)
摘要
Tunable matching networks using switched stubs show promise for real-time impedance matching in high-power radar and jamming applications based on the emerging developments of high-power switches. These self-tuning transmitter amplifiers will quickly maximize range upon changing operating frequency in a dynamically changing spectrum environment. In this paper, we present a fast tuning algorithm capable of maximizing the output power from a tuner with six switched stubs. The control of the tuner from a software-defined radio platform is demonstrated, and complete optimization for output power can be performed in under
$35 \ \mu\mathrm{s}$
following a change in operating frequency or antenna impedance. The algorithm is expected to be applicable to emerging high-power switches with similar reconfiguration times.
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关键词
power amplifier,cognitive radar,search algorithm,impedance tuning
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