Back-to-back microstrip antenna fed with tunable power divider

Author

Yang-Shun Liu ; Jeen-Sheen Row

Author_Institution

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

fYear

2014

fDate

2-5 Dec. 2014

Firstpage

47

Lastpage

48

Abstract

A microstrip antenna structure with pattern reconfigurable characteristics is described. The structure consists of two stacked patch antennas and a tunable feeding network. The two antennas are arranged by a back-to-back configuration, and they are respectively excited by the outputs of the 1-to-2 feeding network composed of a quasi-lumped coupler and two varactor diodes. With controlling the dc voltage of the varactors, the ratio of two outputs of the feeding network can be varied between 1 and 13 dB so that the radiation pattern generated by the two antennas is changed. A prototype operating at 2.45 GHz band is implemented and tested. Experimental results demonstrate that the radiation of the prototype in the H plane can be switched among omnidirection pattern and broadside patterns with various front-to-back ratios.

Keywords

antenna feeds; antenna radiation patterns; microstrip antennas; omnidirectional antennas; power dividers; varactors; waveguide couplers; DC voltage; H-plane; broadside patterns; frequency 2.45 GHz; microstrip antenna; omnidirection pattern; quasilumped coupler; radiation pattern; stacked patch antennas; tunable feeding network; tunable power divider; varactor diodes; Antenna measurements; Antenna radiation patterns; Gain; Microstrip; Microstrip antennas; Power dividers; Prototypes; microstrip antenna; pattern reconfigurable; tunable power divider;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (ISAP), 2014 International Symposium on

Conference_Location

Kaohsiung

Type

conf

DOI

10.1109/ISANP.2014.7026523

Filename

7026523