Title :
Polarisation-rotating quasioptical reflection amplifier cell
Author :
Tsai, H.S. ; York, R.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
A quasioptical amplifier cell suitable for power-combining arrays is presented. Orthogonally polarised patch antennas are coupled to the input and output of a resistive-feedback MESFET amplifier. A simple polarimetric reflectometer was developed to test the amplifier cell which solves the problem of imperfect isolation between transmitting and receiving horns and the DC offset problem of quadrature detectors. A peak effective isotropic power gain (EIPG) of 17dB was measured at 4.2GHz with 1% bandwidth which is limited by patch antennas.
Keywords :
Schottky gate field effect transistors; electromagnetic wave polarisation; electromagnetic wave reflection; feedback; microstrip antennas; microwave amplifiers; microwave antenna arrays; microwave integrated circuits; 17 dB; 4.2 GHz; EIPG; MESFET amplifier; MIC; SHF; orthogonally polarised patch antennas; peak effective isotropic power gain; polarimetric reflectometer; polarisation-rotating; power-combining arrays; quasioptical reflection amplifier cell; resistive-feedback;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931421
