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This article presents design and analysis related issues for a solid-state power amplifier (SSPA) integrated with a planar antenna. It discusses the suitability of different planar antenna structures to minimize EM interaction between the radiator and the associated matching circuitry of the solid-state power amplifier. The design and simulation of an SSPA integrated with an antenna is presented, using harmonic balance analysis and an EM simulator simultaneously, to take care of the coupling between antenna and matching circuitry and to address out-of-band instability and nonlinear analysis of the power amplifier. [ABSTRACT FROM AUTHOR]

This article describes the design, development and test results of a Ku-band channel amplifier with an automatic level control (ALC) system for a satellite transponder. A systematic temperature characterization and optimization procedure depending upon the measured data of the channel amplifier is presented. This procedure takes into account the effect of parameter variations from one unit to another and eliminates the conventional trial and error method to determine the optimum component values of the temperature compensation circuits. [ABSTRACT FROM AUTHOR]

The article presents a discussion on a temperature dependent equivalent circuit of a forward-biased PIN diode. Using this equivalent circuit, the temperature behavior of a PIN diode attenuator circuit is analyzed and test results are presented. A novel control circuit is also offered for temperature invariant variable attenuation over a very wide range of temperature. This proposed circuit uses no separate temperature sensor or compensating mechanism, but responds directly to the junction temperature of the PIN diode.

Describes the design, development and test results of a novel pre-distortion linearizer using the nonlinearity of Schottky diodes. Circuit topology of the linearizer; Design of a reflection type distortion generator; Gain compression and phase change of a solid-state power amplifiers.