Circularly polarized patch antenna with frequency reconfiguration

Gu, Hui and Wang, Jianpeng and Ge, Lei ORCID: (2015) Circularly polarized patch antenna with frequency reconfiguration. IEEE Antennas and Wireless Propagation Letters, 14. pp. 1770-1773. ISSN 1536-1225


A novel circularly polarized (CP) patch antenna with frequency reconfiguration is presented. The antenna consists of a rectangular patch etched with a rectangular-ring slot. Four pairs of varactor diodes are symmetrically placed along the slot. Two orthogonal resonant modes of the patch antenna are simultaneously excited by a single coaxial probe feed. By varying the capacitance values of the varactor diodes with single DC voltage, the resonant frequencies of the two modes can be simultaneously changed. Moreover, by introducing a specific difference between the length and width of the rectangular-ring slot, good CP performances can be obtained over a broad frequency tuning range. A prototype was fabricated and measured. The measured results indicate that a continuously tunable CP operating frequency from 1.92 to 2.51 GHz and stable broadside radiation patterns can be achieved. The measured efficiency rises from about 47% to about 61% as the operating frequency increases from 1.92 to 2.51 GHz.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: No
Item Status: Live Archive
Additional Information: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Jun 2017 00:15
Last Modified: 17 Aug 2017 23:54
Uncontrolled Keywords: Circular polarization; patch antenna; reconfigurable antenna; Broadside radiations; Capacitance values; Circularly polarized; Coaxial probe feed; Frequency tuning range; Operating frequency; Reconfigurable antenna; Rectangular patch
Fields of Research (2008): 09 Engineering > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4008 Electrical engineering > 400899 Electrical engineering not elsewhere classified
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
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