Wideband Circularly Polarized Slotted-Patch Antenna With a Reflector

Author

Jhih-Ming Chen ; Jeen-Sheen Row

Author_Institution

Dept. of Electr. Eng., Nat. Changhua Univ. of Educ., Changhua, Taiwan

Volume

14

fYear

2015

fDate

2015

Firstpage

575

Lastpage

578

Abstract

A design for wideband circularly polarized (CP) antennas with unidirectional radiation is described. The antenna structure is mainly composed of a rectangular slotted patch and a metallic reflector. First, an optimum CP design for the standalone slotted patch antenna is investigated, and a 3-dB-axial-ratio bandwidth of 53% is obtained. Then, the metallic reflector is placed at the rear of the slotted patch for generating unidirectional radiation, and the effects of various reflector sizes on CP performances are studied. Measured results show that the slotted patch antenna with a reflector has almost the same CP bandwidth as the standalone slotted patch antenna, and it has good impedance matching as well as stable radiation patterns across the CP operating frequencies.

Keywords

antenna radiation patterns; broadband antennas; impedance matching; microstrip antennas; reflector antennas; slot antennas; CP operating frequencies; antenna structure; impedance matching; metallic reflector; optimum CP design; radiation patterns; rectangular slotted patch; reflector sizes; standalone slotted patch antenna; unidirectional radiation; wideband circularly polarized slotted-patch antenna; Antenna measurements; Antenna radiation patterns; Bandwidth; Frequency measurement; Patch antennas; Slot antennas; Circular polarization; slotted patch antenna; wideband operation;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2374453

Filename

6967739