Title :
Radiating and scattering analyses of a slot-coupled patch antenna loaded with a MESFET oscillator
Author :
Huang, Chien-Chang ; Chu, Tah-Hsiung
Author_Institution :
Telecommun. Labs., Chung-Li, Taiwan
fDate :
3/1/1995 12:00:00 AM
Abstract :
In this paper, radiating and scattering analyses of a slot-coupled patch antenna loaded with a MESFET oscillator at free-running and injection-locked states are presented. This arrangement is a basic module of an injection-locked active array. With a small injection signal applied directly to the oscillator in a transmission-type mode or indirectly through a patch antenna to the oscillator in a reflection-type mode, the oscillator loaded antenna then becomes an injection-locked active antenna (ILAA) within the locking range. Simulation results yield the oscillating frequency and radiating power at the free-running state and the locking range and radiating power at the injection-locked state. Both radiating and scattering analyses are performed in a unified approach for the transmission-type and reflection-type operation modes of ILAA. Experiments show the validity of the developed theoretical analyses. These results can be applied in the ILAA array design
Keywords :
Schottky gate field effect transistors; active antenna arrays; antenna radiation patterns; electromagnetic wave scattering; microstrip antenna arrays; microwave antenna arrays; microwave oscillators; MESFET oscillator; free-running state; injection signal; injection-locked active antenna; injection-locked active array; injection-locked state; locking range; oscillating frequency; oscillator loaded antenna; radiating analysis; radiating power; reflection-type mode; scattering analysis; simulation results; slot-coupled patch antenna; transmission-type mode; Frequency; Injection-locked oscillators; Loaded antennas; MESFETs; Optical resonators; Optical scattering; Patch antennas; Power generation; Reflector antennas; Transmitting antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
