A Compact Frequency Scanning Planar Array Using Characteristic Mode Analysis

In this letter, a compact planar array with frequency scanning characteristics is proposed. Based on the characteristic mode analysis (CMA), we found that there distribute four modes with distinctive radiation patterns and phase characteristics. And combining them in pairs would generate scanning be...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2021-09, Vol.20 (9), p.1666-1670
Main Authors: Fu, Xiaona, Zhang, Zhan, Wang, Junhong
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Arrays
Characteristic mode analysis (CMA)
frequency beam scanning
Frequency scanning
Frequency synthesizers
Microstrip
Microstrip antenna arrays
microstrip array
Optical switches
Phased arrays
Pins
Sidelobe reduction
Sidelobes
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Summary:In this letter, a compact planar array with frequency scanning characteristics is proposed. Based on the characteristic mode analysis (CMA), we found that there distribute four modes with distinctive radiation patterns and phase characteristics. And combining them in pairs would generate scanning beams within a narrow band. In addition, CMA offers us useful guidelines on enhancing the gain and suppressing the sidelobes. A prototype was fabricated and measured. Under the excitation of a single port, namely P_{1}, the scanning range was from 14^{\circ } to 51^{\circ } with sidelobe level (SLL) lower than −20 dB. As switching the port from P_{1} to its symmetrical port, P_{2}, the scanning scope in the E -plane would be extended to the mirrored space from -14^{\circ } to -51^{\circ }.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2021.3092366