Simultaneous Multifrequency Near-Field Radio Holography of Reflector Antennas

Simultaneous Multifrequency Near-Field Radio Holography of Reflector Antennas

We propose a simultaneous multifrequency near-field radio holography method for measuring reflector surfaces of radio telescopes with high precision. With a comb spectrum generator as the beacon source, this method can obtain aperture phase maps at multiple frequencies simultaneously and thereby red...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2024-08, Vol.72 (8), p.6242-6250
Hauptverfasser: Zhang, Xiaoling, Liu, Wei, Zuo, Yingxi, Lan, Yue, Lou, Zheng, Qian, Yuan, Chen, Bingjie
Format: Artikel
Sprache:eng
Schlagworte:
Antenna measurements
Apertures
Beams (radiation)
Comb spectrum signal
Extraterrestrial measurements
Frequency measurement
Holography
Measurement methods
multipath interference
Near fields
near-field holography
Pattern analysis
Radio astronomy
Radio signals
radio telescope
Radio telescopes
Receivers
Reflector antennas
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Beschreibung
Zusammenfassung:We propose a simultaneous multifrequency near-field radio holography method for measuring reflector surfaces of radio telescopes with high precision. With a comb spectrum generator as the beacon source, this method can obtain aperture phase maps at multiple frequencies simultaneously and thereby reduce the interference of multipath signals and improve the measurement precision of radio holography. The simulation and analysis of the multipath effect on antenna beam pattern measurement are presented. A simultaneous multifrequency near-field holography system operating at the W-band is built for experimental validation. Demonstrating experiment conducted on a 1.2-m aperture submillimeter antenna is reported and discussed.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2024.3418189