DocumentCode :
1126849
Title :
An Active Low-Noise Receiver With Electronic Beamforming Capability at { K}_{ a} -Band Frequencies
Author :
Grubinger, Hannes ; Barth, Helmut ; Vahldieck, Ruediger
Author_Institution :
ETH Zurich, Zurich
Volume :
56
Issue :
5
fYear :
2008
fDate :
5/1/2008 12:00:00 AM
Firstpage :
1013
Lastpage :
1023
Abstract :
Injection-locked voltage-controlled oscillators (VCOs) are used for a novel implementation of low-noise receivers used for beamforming. A continuous per-receiver phase shift of 400deg is achieved by locking a low-Q VCO and frequency doubling the signal. The used locking circuit and its locking gain are optimized to obtain a large locking range and a continuous phase-tuning characteristic. Phase noise is minimized by developing a high-Q reference oscillator. The achieved low noise figure of only 2.5 dB enables excellent reception of low-power signals. The realization on a RT/Duroid epsivr=10.2 substrate yields a highly compact module, which serves as a testbed for a planned implementation in low-temperature co-fired ceramic technology.
Keywords :
injection locked oscillators; millimetre wave receivers; phase noise; reference circuits; voltage-controlled oscillators; Ka-band frequencies; VCO; active low-noise receiver; electronic beamforming capability; injection-locked voltage-controlled oscillators; locking circuit; locking gain; low noise figure; noise figure 2.5 dB; phase noise; phase shift; phase-tuning characteristic; reference oscillator; Beamforming; injection locking; low-temperature co-fired ceramic (LTCC); phased arrays; voltage-controlled oscillator (VCO);
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2008.921284
Filename :
4484969
Link To Document :
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