Dual-Frequency and Broadband Circular Patch Antennas With a Monopole-Type Pattern Based on Epsilon-Negative Transmission Line

被引：28

作者：

Hou, Quanwen ^{[1
]}

Tang, Hangfei ^{[1
]}

Liu, Yahong ^{[1
]}

Zhao, Xiaopeng ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Dept Appl Phys, Smart Mat Lab, Xian 710129, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2012年 / 11卷

基金：

中国国家自然科学基金;

关键词：

Broadband; dual frequency; epsilon-negative transmission line (ENG TL); monopole-type radiation pattern; patch antenna; RESONANT ANTENNAS; COMPACT;

D O I：

10.1109/LAWP.2012.2195470

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：

Dual-frequency and broadband circular patch antennas based on epsilon-negative (ENG) transmission line (TL) with omnidirectional patterns are presented. The ENG TL is achieved by placing mushroom structures along its circumference. Compared to the conventional circular patch antenna whose fundamental operation mode is TM11 mode, the fundamental operation mode of the new antenna is TM01 mode with a monopole-type radiation pattern. With careful design, two omnidirectional modes, TM01 and TM02, can be excited simultaneously. Through this excitation, a dual-frequency antenna with monopole-type pattern can be realized. Frequency ratio can be tuned by changing the number of mushroom unit cells. A broadband antenna can then be implemented by optimizing the frequency ratio. The performances of the proposed antennas are studied numerically and experimentally. The measured and simulated results are in good agreement.

引用

页码：442 / 445

页数：4