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The range of radar and communication systems working in the atmospheric window around 140 GHz strongly is limited by the output power of the transmit amplifier. To allow for long range application, a broadband power amplifier with 145 GHz center frequency and a −3dB bandwidth from 130 GHz to 160 GHz has been developed. It makes use of a binary power dividing topology, which is compact size and allows...
For application at frequencies around 140 GHz, a solid-state amplifier with variable output matching was developed. Its output matching network makes use of a capacitively loaded shunt switch in series and a shunt switch in parallel. By variation of the control voltages of the series and parallel switches, the output impedance continuously can be changed in a wide range. This makes the circuit very...
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