TY - JOUR
T1 - Cavity Control of Active Integrated Antenna Oscillators
AU - Zheng, Ming
AU - Gardner, Peter
AU - Hall, Peter
AU - Hao, Yang
AU - Chen, Q
AU - Fusco, VF
PY - 2001/1/1
Y1 - 2001/1/1
N2 - The use of a cavity coupled to an active integrated antenna oscillator is described. The cavity increases the loaded Q factor of the oscillator, thus improving stability and reducing the phase noise. Cavity stabilisation of a microstrip patch and slot ring oscillators is described, In both cases, phase noise at a frequency offset of 10kHz is reduced by the order of 20dB. A first-order analysis based on measured and simulated cavity Q factors is shown to give similar results. A Van der Pol analysis of a two-element array of patch oscillators, with a single extended coupled cavity, indicates that the likelihood of mutual locking in an array which has oscillators with slightly different free running frequencies is enhanced albeit at the expense of increased start-up time.
AB - The use of a cavity coupled to an active integrated antenna oscillator is described. The cavity increases the loaded Q factor of the oscillator, thus improving stability and reducing the phase noise. Cavity stabilisation of a microstrip patch and slot ring oscillators is described, In both cases, phase noise at a frequency offset of 10kHz is reduced by the order of 20dB. A first-order analysis based on measured and simulated cavity Q factors is shown to give similar results. A Van der Pol analysis of a two-element array of patch oscillators, with a single extended coupled cavity, indicates that the likelihood of mutual locking in an array which has oscillators with slightly different free running frequencies is enhanced albeit at the expense of increased start-up time.
UR - http://www.scopus.com/inward/record.url?scp=0035245738&partnerID=8YFLogxK
U2 - 10.1049/ip-map:20010221
DO - 10.1049/ip-map:20010221
M3 - Article
SN - 1350-2417
VL - 148
SP - 15
EP - 20
JO - IEE Proceedings - Microwaves, Antennas & Propagation
JF - IEE Proceedings - Microwaves, Antennas & Propagation
IS - 1
ER -