Title :
Active quarter-wavelength dielectric radiator with circularly polarised radiation pattern
Author :
Ng, T.-B. ; Lam, M.-L.
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
Abstract :
An active circularly-polarised dielectric radiator array (DRA), which is integrated with a transistor, is formed by a special arrangement of four slow wave lambda /4 dielectric resonators (DRs) together with a 90 degrees phase shifter. Small size, low phase noise and high frequency stability are the major characteristics of this DRA at 480 MHz. With proper circuit topology, the DRA can be used as a Doppler motion detector.
Keywords :
active antennas; antenna radiation patterns; dielectric resonators; electromagnetic wave polarisation; microwave antenna arrays; 480 MHz; 90 degrees phase shifter; Doppler motion detector; UHF; active array; circularly polarised; dielectric radiator; frequency stability; integrated transistor; phase noise; quarter-wavelength; radiation pattern; slow wave DR;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19911093
