A compact direct detection receiver for L-band STAR radiometry

Abstract

Abslracl -An L-band total power receiver for use in a synthetic thinned array radiometer (STAR) is described. The total power architecture of a radiometer receiver requires special considerations to control gain fluctuations due to small temperature drifts. The STAR application requires consistent passband and stable phase between receiven. The design presented incorporates direct detection to eliminate distributed local oscillators for phase stability, distributed ceramic interference reject filters for passband consistency and temperature compensating atteuuatnrs for gain stability. The receiver is packaged in a unique "winged-hex'' shape to enable close packaging with the STAR antennas and to facilitate thermal management. The resulting low cost, compact receiver is made from COTS components.

Wideband, Low Profile Coupling Suppression Circuit for Simultaneous Transmit and Receive System Based on Hybrid Finite Impulse Response and Resonator Topology

“…2, to operate across 800MHz of bandwidth. A prototype is fabricated and tested from 1GHz to 1.8GHz, for L-band applications [24], [25]. Notably, the L-band is used for satellite navigation, mobile service, aircraft surveillance, as well as digital audio and multimedia broadcasting.…”