Frequency-scanning radiometer,申请号US19870119717-传众专利搜索

Frequency-scanning radiometer

申请公布号：US4864308(A)

申请号：US19870119717

申请日期：1987.11.12

申请公布日期：1989.09.05

申请人：

COM DEV LTD.

发明人：RAAB, ANTHONY R.;THORPE, WILLIAM;HEALY, THOMAS P. G.

分类号：G01K11/00;H01Q3/22

主分类号：G01K11/00

摘要：An electronically scanned radiometer has a dispersive serpentine antenna with one or two ports. A mixer is connected to each port with each mixer being fed by a variable frequency local oscillator. Each oscillator provides the mixer to which it is connected with a drive signal that varies in frequency. The antenna most efficiently receives one or more beams through radiators at an angle that varies with the frequency of the drive signal at the mixer. An output is received at each port and is appropriately displayed. When the serpentine has two ports the radiometer can be operated at two orthogonal polarizations. The frequency being fed to each mixer can be varied in various predetermined patterns. Scanning of the beam can be effected by changing the frequency of observation without physically rotating the antenna. Also two simultaneous beams rotating in opposite directions with independent motions can be achieved.