Numerical and Experimental Investigation of an Ultrawideband Ridged Pyramidal Horn Antenna With Curved Launching Plane for Pulse Radiation

被引：104

作者：

Li, Xu ^{[1
]}

Hagness, Susan C. ^{[1
]}

Choi, Min K. ^{[1
]}

van der Weide, Daniel W. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2003年 / 2卷

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

Breast cancer detection; finite-difference time-domain (FDTD); horn antennas; impulse radar; microwave imaging; ultrawideband (UWB) antennas;

D O I：

10.1109/LAWP.2003.820708

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report the numerical analysis and experimental characterization of an ultrawideband (UWB) antenna designed for radiating short microwave pulses. The antenna consists of a pyramidal horn, a ridge, and a curved launching plane terminated with resistors. Detailed three-dimensional finite-difference time-domain (FDTD) simulations have been conducted to assist with the characterization of the antenna. FDTD results are compared with experimental data and are shown to be in good agreement. We demonstrate that the antenna exhibits a very low voltage standing wave ratio (<= 1.5) over a wide frequency range from 1 to 11 GHz and a very high fidelity (>= 0.92). The spatial distribution of radiated energy is characterized both in the time domain, using transient field observations at various angles, as well as in the frequency domain, using single-frequency far-field radiation patterns. We conclude that this antenna offers high-fidelity transmission and reception of ultrashort microwave pulses with minimal distortion.

引用

页码：259 / 262

页数：4

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