Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 68, Issue 12, Pages 7767-7776Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2020.2998872
Keywords
Apertures; Beam steering; Lenses; Antenna measurements; Azimuth; Design methodology; Beam steering; near-field antenna; nondiffractive beam; phase shift surface (PSS) antenna
Funding
- National Natural Science Foundation of China [U19A2056, 61622105]
- National Key Research and Development Plan of China [2018YFB1801505]
- National Defense Pre-Research Foundation of China [61404130407]
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A phase shift surface (PSS) antenna launching steerable quasi-nondiffractive beam is proposed in this article. The principle of the far-field beam-steering antenna using the Risley prism is introduced to the near-field nondiffractive beam antenna. To match the specific phase distribution requirement of the scanning quasi-nondiffractive beam, the linear phase shift distribution on the Risley prism is reconstructed as a nonlinear one. The quasi-nondiffractive beam with considerable and stable depth of field can be steered within the front hemisphere of the antenna by mechanically rotating two PSSs. A prototype antenna is fabricated and its near-field patterns are measured. The scanning range of the beam is from 0 degrees to 54 degrees in zenith and from 0 degrees to 360 degrees in azimuth. The beam's direction and its depth of field remain stable within the frequency band of 27-29 GHz. The beam maintains accurate direction and stable depth of field during the steering process.
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