Study of an internally matched helical beam antenna

Author

Wong, Kin-Lu ; Chen, Wen-Shyang

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

39

Issue

6

fYear

1991

fDate

6/1/1991 12:00:00 AM

Firstpage

811

Lastpage

814

Abstract

An internally matched helical beam antenna has been designed and constructed. The helix winding of a helical antenna was designed to be a slow wave section by placing a ground copper sheet on the inner side of the winding and inserting a dielectric sheet between the winding and the ground copper sheet to form a distributed capacitance along the antenna. By carefully adjusting the internal inductance of the helix winding and the distributed capacitance, the antenna can radiate in the axial mode and be internally matched to the 50-Ω transmission line feeding it. With this arrangement, the dimension of such an antenna can be much smaller than that for an ordinary helical beam antenna at the same operating condition. Details of the antenna design and experimental results are presented

Keywords

antennas; 50-Ω transmission line; antenna design; axial mode radiation; dielectric sheet; distributed capacitance; experimental results; ground copper sheet; helix winding; internal inductance; internally matched helical beam antenna; slow wave section; Antenna feeds; Antennas and propagation; Capacitance; Copper; Dielectrics; Directional antennas; Frequency; Helical antennas; Inductance; Transmission line antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.86880

Filename

86880