Self-diplexing antenna using the square patch with a hole

Author

Lee, J. ; Koshio, T. ; Goto, N.

Author_Institution

Dept. of Electron. & Syst., Takushoku Univ., Tokyo, Japan

Volume

149

Issue

1

fYear

2002

fDate

2/1/2002 12:00:00 AM

Firstpage

7

Lastpage

10

Abstract

The paper proposes a double-layered circularly polarised self-diplexing antenna (SDA) using a square patch with a shorted hole, which is a new type antenna with improved diplexing characteristics. The equivalent relative permittivity can be adjusted by changing the size of hole. The E-plane radiation energy at ±90° is largely reduced when the relative permittivity is unity. To utilise this characteristic, a double-layered SDA is proposed which consists of the lower layer of a square patch with a hole and the upper layer of a 0.5 λ₀ airgap square patch. Using this antenna, the isolation level was improved by a minimum of -54 dB

Keywords

antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; mobile satellite communication; multiplexing equipment; E-plane radiation energy; airgap square patch; diplexing characteristics; double-layered SDA; double-layered circularly polarised antenna; equivalent relative permittivity; hole size; isolation level; mobile satellite communications system; radiation pattern; self-diplexing antenna; shorted hole; square patch;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20010117

Filename

999094