Title :
Ring-coupled-oscillator sequentially rotated active antenna
Author :
Yang, Suidong ; Fusco, Vincent F. ; Humphrey, Denver E J
Author_Institution :
Dept. of Electr. & Electron. Eng., Queen´´s Univ., Belfast, UK
fDate :
8/1/2001 12:00:00 AM
Abstract :
In this paper, an active four-element patch antenna, backed by four GaAs monolithic-microwave integrated-circuit (MMIC) 4.4-GHz oscillators, self-locked by mutual coupling through a lumped capacitive ring MMIC network, has been designed, fabricated, and tested. The sequentially rotated arrangement given here when augmented with a lumped capacitive coupling network suggests that in-phase oscillator entrainment is guaranteed so that spatial power combination by the antenna array occurs with circular polarization characteristics
Keywords :
III-V semiconductors; MMIC oscillators; active antenna arrays; gallium arsenide; microstrip antenna arrays; 4.4 GHz; GaAs; GaAs MMIC oscillator; circular polarization; in-phase entrainment; injection locking; lumped capacitive ring network; mutual coupling; ring coupled oscillator; sequentially rotated active patch antenna array; spatial power combining; Antenna arrays; Frequency; Injection-locked oscillators; MMICs; Microwave antenna arrays; Microwave oscillators; Mutual coupling; Phased arrays; Polarization; Ring oscillators;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
