Title :
A compact direct detection receiver for L-band STAR radiometry
Author :
van Nieuwstadt, L. ; De Roo, R. ; Boprie, D. ; Rizor, R. ; Hansen, P. ; England, A.W. ; Hanh Pham ; Boon Lim
Author_Institution :
Space Phys. Res. Lab., Michigan Univ., Ann Arbor, MI, USA
Abstract :
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 receivers. 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 attenuators 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.
Keywords :
UHF detectors; radiometers; receivers; remote sensing; signal detection; stability; thermal management (packaging); 1400 to 1427 MHz; COTS components; L-band STAR radiometry; L-band total power receiver; compact direct detection receiver; distributed ceramic interference reject filters; gain fluctuations control; gain stability; low cost receiver; passband consistency; phase stability; synthetic thinned array radiometer; temperature compensating attenuators; temperature drifts; thermal management; winged-hex packaging; Fluctuations; L-band; Packaging; Passband; Phase detection; Radio control; Radiometry; Stability; Temperature control; Thermal management;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1211001
