Title

A Low-Cost Patch Antenna Phased Array With Analog Beam Steering Using Mutual Coupling And Reactive Loading

Keywords

Beam steering; Mutual coupling; Patch antenna; Phase shifter; Phased arrays

Abstract

In this letter, a low-cost patch antenna phased array is demonstrated with analog beam steering without using phase shifters. This novel technique can greatly reduce the cost of a phased-array system and will enable the wide-scale deployment of phased arrays in low-end commercial products. In the presented three-element phased array, the center (driven) antenna is fed by an RF source and the two neighboring (passive) antennas are excited through the mutual coupling from the center antenna. The phase shifts between the antenna elements are achieved by changing the reactance of the capacitors loading the two passive antennas. A phased array using this novel technique is designed, fabricated, and measured at 3 GHz with a bandwidth of 1.8%. This phased array is shown to be able to steer the antenna beam from -20 to 20 degrees in an analog fashion. The measured radiation patterns of this phased array closely match the theoretical calculation and full-wave simulation results. © 2008 IEEE.

Publication Date

12-1-2008

Publication Title

IEEE Antennas and Wireless Propagation Letters

Volume

7

Number of Pages

81-84

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/LAWP.2008.916689

Socpus ID

72949110651 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/72949110651

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