A Probe-Fed U-Shaped Cross-Sectional Antenna with Tuning Stubs on a U-Shaped Ground Plane

Duang-arthit SRIMOON
Chuwong PHONGCHAROENPANICH
Monai KRAIRIKSH

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.5    pp.1636-1645
Publication Date: 2006/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.5.1636
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
U-shaped cross-sectional antenna,  U-shaped ground plane,  tuning stubs,  finite-difference time-domain,  broadband,  polarization,  

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Summary: 
A probe-fed U-shaped cross-sectional antenna with tuning stubs on a U-shaped ground plane is proposed for wideband applications. The bottom of the antenna is etched to form tuning stubs for impedance matching. The simulated results of return loss, co- and cross-polarized patterns are presented and compared with the measured ones. Characteristics of a constructed antenna prototype at the operating frequency show that the antenna has an impedance bandwidth (2:1 VSWR) of 37.44% and average gain level of 8.5 dBi. Good radiation characteristics of the proposed antenna have been obtained that is the cross-polarization level and front-to-back ratio in both E- and H-planes across the large bandwidth are better than 22 dB and 12 dB, respectively.