Design of a Compact Dual-Band Annular-Ring Slot Antenna

Author

Sze, Jia-Yi ; Hsu, Chung-I G. ; Hsu, Sheng-Chin

Author_Institution

Nat. Defense Univ., Taoyuan

Volume

6

fYear

2007

fDate

6/29/1905 12:00:00 AM

Firstpage

423

Lastpage

426

Abstract

This letter aims at miniaturizing an annular-ring slot antenna that is suitable for the 2.4/5-GHz dual-band operations. The miniaturization purpose was achieved by embedding in the center patch of the antenna a pair of slots to excite three resonant modes. The resonant band of the first excited resonant mode was lowered from that of the unperturbed annular-ring slot antenna, whereas those of the second and third excited resonant modes were combined to form a wide upper operating band by appropriately adjusting the dimensions of the embedded slots. The proposed antenna proves to have very similar copolarization radiation patterns in its two operating bands and have enough antenna gains for practical applications.

Keywords

UHF antennas; antenna radiation patterns; loop antennas; microwave antennas; multifrequency antennas; slot antennas; annular ring slot antenna; antenna gains; compact dual band slot antenna; copolarization radiation patterns; embedded slots; frequency 2.4 GHz; frequency 5 GHz; miniaturization; resonant band; resonant modes; Antennas and propagation; Dielectric substrates; Dual band; Etching; Frequency; Magnetic resonance; Microstrip antennas; Microwave antennas; Slot antennas; Structural engineering; Multifrequency antennas; slot antennas;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2007.902053

Filename

4301380