A 16-element two-dimensional active self-steering array using self-oscillating mixers

A 16-element two-dimensional active self-steering array using self-oscillating mixers

A 16-element two-dimensional (2-D) retrodirective array using self-oscillating mixers (SOMs) is presented. SOMs allow for easier implementation of larger 2-D arrays by eliminating the complex local-oscillator (LO) feed structure. A 4 /spl times/ 4 element retrodirective array using SOMs is demonstra...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2003-12, Vol.51 (12), p.2476-2482
Hauptverfasser: Shiroma, G.S., Miyamoto, R.Y., Shiroma, W.A.
Format: Artikel
Sprache:eng
Schlagworte:
Arrays
Beam steering
Feeds
Microwave antenna arrays
Microwaves
Mixers
Noise
Noise levels
Oscillators
Phase noise
Phased arrays
Planes
Radio frequency
Scattering
Two dimensional
Two dimensional displays
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Zusammenfassung:A 16-element two-dimensional (2-D) retrodirective array using self-oscillating mixers (SOMs) is presented. SOMs allow for easier implementation of larger 2-D arrays by eliminating the complex local-oscillator (LO) feed structure. A 4 /spl times/ 4 element retrodirective array using SOMs is demonstrated at an LO frequency of 7.68 GHz. Each element is phased locked at the LO frequency with an accompanying RF frequency isolation of 17.9 dB between adjacent horizontal elements and 22.2 dB between adjacent vertical elements. A -10-dBm external injection-locking signal is applied to reduce the phase noise of the 16-element array to -68.2 dBc/Hz at 10-kHz offset. Retrodirectivity is observed in the /spl phi/=0/spl deg/, /spl phi/=-45/spl deg/, and /spl phi/=-90 plane for scattering angles of /spl theta/=-15/spl deg/, /spl theta/=0/spl deg/, and /spl theta/=+30/spl deg/.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2003.819779