Frequency tunable dualmode microstrip patch antenna with polarization reconfiguration

Author

Babakhani, Behrouz ; Sharma, Sanjay Kumar

Author_Institution

Dept. of Electr. & Comput. Eng., San Diego State Univ., San Diego, CA, USA

fYear

2014

fDate

6-11 July 2014

Firstpage

785

Lastpage

786

Abstract

A dual mode (TM₁₁ and TM₂₁) circular microstrip patch antenna combined with an annular ring is investigated for frequency tunability and polarization reconfiguration. Using varactor diodes, the resonant frequency of the both modes is tuned from 1.58 GHz down to 1.19 GHz which covers L-band communications with S₁₁ = -10dB. Each of the modes (patch and ring) employs two feed ports with 90° and 45° angular separation for TM₁₁ and TM₂₁ modes generation, respectively. By suitably exciting these ports, four different polarizations: linear vertical, linear horizontal, left hand circular polarization (LHCP) and right hand circular polarization (RHCP) can be generated simultaneously with the frequency tunability.

Keywords

UHF antennas; antenna feeds; microstrip antennas; varactors; LHCP; RHCP; annular ring; dual mode circular microstrip patch antenna; feed ports; frequency 1.19 GHz; frequency 1.58 GHz; frequency tunability; left hand circular polarization; linear horizontal polarization; linear vertical polarization; polarization reconfiguration; right hand circular polarization; varactor diodes; Microstrip; Microstrip antenna arrays; Microstrip antennas; Patch antennas; Polarization; Resonant frequency; Varactors;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE

Conference_Location

Memphis, TN

ISSN

1522-3965

Print_ISBN

978-1-4799-3538-3

Type

conf

DOI

10.1109/APS.2014.6904722

Filename

6904722