Design and development of high-gain wideband circularly polarized patch antenna

Author

Aswad, Ali K. ; Abdulrazak, Lway Faisal ; Rahman, Tharek Abd

Author_Institution

Wireless Commun. Center, Univ. Teknol. Malaysia, Skudai

fYear

2008

fDate

2-4 Dec. 2008

Firstpage

109

Lastpage

111

Abstract

New design of obtaining circular polarization (CP) radiation of a single-feed microstrip antenna is presented. The antenna substrate has an air-layer with thickness about 2.5% of the wavelength at a resonant operating frequency. By using a short probe pin the antenna can be excited easily. The two truncated opposite corners technique is used to obtain the circular polarized operation by selecting an optimal size of truncating. A flat ground plane with an optimal position for the probe pin is used to generate an impedance matching with a wide bandwidth. The CP patch antenna built for IEEE 802.11b/g (2.4 GHz ~ 2.4835 GHz) frequency bands. Measured -10 dB bandwidth is 14.3% and the measured S11, maximum gains and half-power beamwidth are, -41 dB, 8.3 dBi, 75deg respectively. The details of design and experimental results for the proposed design are presented and discussed.

Keywords

UHF antennas; antenna feeds; broadband antennas; electromagnetic wave polarisation; impedance matching; microstrip antennas; wireless LAN; IEEE 802.11b/g; antenna substrate; circularly polarized radiation; flat ground plane; frequency 2.40 GHz to 2.4835 GHz; high-gain wideband patch antenna; impedance matching; short probe pin; single-feed microstrip antenna; truncated opposite corners technique; truncated square patch antenna; Antenna measurements; Bandwidth; Broadband antennas; Gain measurement; Microstrip antennas; Patch antennas; Polarization; Probes; Resonance; Resonant frequency; Antenna; WLAN; broadband antenna; circularly-polarized antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

RF and Microwave Conference, 2008. RFM 2008. IEEE International

Conference_Location

Kuala Lumpur

Print_ISBN

978-1-4244-2866-3

Electronic_ISBN

978-1-4244-2867-0

Type

conf

DOI

10.1109/RFM.2008.4897368

Filename

4897368