Fundamental Study on Novel Loop-Line Antennas Radiating a Circularly Polarized Wave

Author

Hirose, Kazuhide ; Shibasaki, Tetsuya ; Nakano, Hisamatsu

Author_Institution

Coll. of Eng., Shibaura Inst. of Technol., Tokyo, Japan

Volume

11

fYear

2012

fDate

7/4/1905 12:00:00 AM

Firstpage

476

Lastpage

479

Abstract

We propose two types of microstrip-line antennas, designated as connected and penetrated loop-line antennas. Each antenna is composed of loops and straight lines and analyzed using the method of moments. It is found that a circularly polarized beam with an axial ratio of 0.1 dB can be formed by shifting the straight lines with respect to the loop centers. Further analysis reveals that local radiation from the straight lines of the penetrated loop-line antenna is remarkably small (-17 dB) in comparison to that (-7 dB) of the connected loop-line antenna.

Keywords

antenna radiation patterns; electromagnetic wave polarisation; loop antennas; method of moments; microstrip antenna arrays; microstrip lines; antenna radiation; axial ratio; circularly polarized beam; circularly polarized wave; connected loop-line antenna; local radiation; method of moments; microstrip-line antenna; penetrated loop-line antenna; Antenna feeds; Antenna radiation patterns; Directive antennas; Gain; Microstrip; Microstrip antennas; Circular polarization; loop antenna arrays; microstrip-line antennas;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2012.2196965

Filename

6193118