S-C bands broadband envelop detector design

Abstract

This paper proposes the design, fabrication, characterization and measurement of an S-C band broadband detector. A brief theoretical outline of detectors and detector devices is presented. The commercially available GaAs packaged detector diode SOD-323 was adapted to build an unamplified detector. A broadband microchip impedance matching network procedure was developed, characterised and used to provide the broadband design for the detector. The measurements show a close agreement between the simulated and measured results. The bandwidth obtained was better than 5 GHz or 100% for 5 GHz frequency centre from 2 GHz to 8 GHz; minimum voltage sensitivity 200 mV/mW over 2 GHz to 8 GHz was achieved and the peak value was more than 1130 mV/mW at 3 GHz.