Abstract
The design and analysis of an ultra wideband aperture antenna with dual-band-notched characteristics are presented. The proposed antenna consists of a circular ring exciting stub on the front side and a circular slot on the back ground plane. By utilizing a parasitic strip and a T-shaped stub on the antenna structure, two notched bands of 850 MHz (3.5-4.35 GHz) and 900 MHz (5.05-5.95 GHz) are achieved. The proposed antenna is fabricated and measured. Measured results show that this antenna operates from 2.3 GHz to upper 11 GHz for voltage standing wave ratio less than 2, except two frequency notched bands of 3.5-4.35 and 5.05-5.95 GHz. Moreover, the experimental results show that proposed antenna has stable radiation patterns and constant gain. A conceptual circuit model, which is based on the measured impedance of the proposed antenna, is also shown to investigate the dual-band-notched characteristics.
Highlights
IntroductionFirst approved rules for the commercial use of ultra wideband (UWB) in 2002 [1], the feasible design and implementation of UWB system has become a highly competitive topic in both academy and industry communities of telecommunications
Since the Federal Communications Commission (FCC)first approved rules for the commercial use of ultra wideband (UWB) in 2002 [1], the feasible design and implementation of UWB system has become a highly competitive topic in both academy and industry communities of telecommunications
To overcome problems caused by this electromagnetic interference, various UWB antennas with single or multiple notch functions have been developed for UWB communication systems [7,8,9,10,11,12,13,14]
Summary
First approved rules for the commercial use of ultra wideband (UWB) in 2002 [1], the feasible design and implementation of UWB system has become a highly competitive topic in both academy and industry communities of telecommunications. Antennas are the challenging aspect of UWB technology To satisfy such a requirement, various wideband antennas have been studied [2,3,4,5]. To overcome problems caused by this electromagnetic interference, various UWB antennas with single or multiple notch functions have been developed for UWB communication systems [7,8,9,10,11,12,13,14]. In this article, based on designs presented in [5,10], a circular slot UWB antenna with dual-band-notched characteristics is presented. A conceptual circuit model, which is based on the measured impedance of the proposed antenna, is shown for investigating the dual-band-notched characteristics.
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