Wideband Circular Patch Antenna for Pattern Diversity Application

Author

Lan Cui ; Wen Wu ; Da-Gang Fang

Author_Institution

Ministerial Key Lab. of JGMT, Nanjing Univ. of Sci. & Technol., Nanjing, China

Volume

14

fYear

2015

fDate

2015

Firstpage

1298

Lastpage

1301

Abstract

A low-profile wideband circular patch antenna with pattern diversity is proposed. The TM mode of the patch is excited by two feeding loops with in-phase current, which radiates the broadside beam. The TM mode is excited by another set of feeding loops with antiphase current, which radiates a conical beam. The two modes can operate at an overlapped frequency range. The proposed antenna is fabricated and measured. The measured impedance bandwidth (VSWR <; 2) for the broadside beam is from 1.71 to 2.25 GHz, and for the conical beam is from 1.36 to 2.17 GHz. The measured gains of the broadside beams and conical beams are 8-9.7 dBi and 3.8-6.4 dBi, respectively. The isolation between the two input ports is better than -25 dB. The antenna can be used as a pattern diversity antenna for modern mobile communications.

Keywords

UHF antennas; antenna feeds; antenna radiation patterns; broadband antennas; diversity reception; microstrip antennas; mobile communication; TM mode; antiphase current; broadside beams; conical beams; feeding loops; frequency 1.36 GHz to 2.17 GHz; frequency 1.71 GHz to 2.25 GHz; impedance bandwidth; in-phase current; low-profile wideband circular patch antenna; modern mobile communications; pattern diversity antenna; Antenna measurements; Antenna radiation patterns; Impedance; Microstrip; Patch antennas; Substrates; Broadside beam; circular patch antenna; conical beam; pattern diversity; wideband antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2015.2403358

Filename

7041159