A low-profile conical beam loop antenna with an electromagnetically coupled feed system

Author

Nakano, H. ; Fujimori, K. ; Yamauchi, J.

Author_Institution

Coll. of Eng., Hosei Univ., Tokyo, Japan

Volume

48

Issue

12

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1864

Lastpage

1866

Abstract

The radiation characteristics of a low-profile loop antenna are evaluated using the method of moments (MoM). The loop having a circumference of approximately two wavelengths is electromagnetically coupled to a bent Feed line and radiates a circularly polarized conical beam. The frequency bandwidth for a 3-dB axial ratio criterion is calculated to be approximately 0.5% for an antenna height of h=0.064 wavelengths. Over the same bandwidth, the input impedance is approximately 50 ohms and the gain is approximately 7 dB

Keywords

antenna feeds; antenna radiation patterns; electric impedance; electromagnetic coupling; electromagnetic wave polarisation; impedance matching; loop antennas; method of moments; 7 dB; MoM; antenna gain; bent Feed line; circularly polarized conical beam; conical beam loop antenna; electromagnetically coupled feed system; frequency bandwidth; impedance matching; input impedance; low-profile loop antenna; method of moments; radiation characteristics; Acoustic beams; Acoustic scattering; Antenna feeds; Bandwidth; Electromagnetic coupling; Electromagnetic scattering; Impedance; Optical coupling; Polarization; Testing;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.901276

Filename

901276