A Symmetrical Closed-Loop Conformal Antenna With Wideband for Capsule Endoscope

被引：5
|
作者：
Zhang, Gaoji [1 ]
Song, Xiangzhuang [2 ]
Yu, Zhong [1 ]
An, Xudong [3 ]
机构：
[1] Xian Univ Posts & Telecommun, Sch Commun & Informat Engn, Xian 710071, Peoples R China
[2] Xian Univ Posts & Telecommun, Xian 710071, Peoples R China
[3] China Acad Telecommun Res, Minist Ind & Informat Technol, Beijing 100191, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2021年 / 20卷 / 10期
关键词：
Antennas; Antenna measurements; Antenna radiation patterns; Wideband; Endoscopes; Intestines; Antenna feeds; Capsule antenna; capsule endoscope; closed-loop; conformal; differential feeding; wideband;
D O I：
10.1109/LAWP.2021.3100525
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：
A symmetrical closed-loop conformal antenna is designed for capsule endoscope at wireless medical telemetry service (608-614 MHz) band and industrial, scientific, and medical (902-918 MHz and 2.4-2.4835 GHz) band. The antenna is compartmentalized into two loops with an inverted-omega loop and a hollow-T loop by the differential feeding. The antenna has a wideband (|S-11| < -10 dB) covering 0.47-1.14 GHz and 1.38-3 GHz. The omnidirectional radiation pattern of the antenna is verified by measurement, and the peak gains are (-15.5, -16.8, and -23.1) dBi for the (611, 915, and 2400) MHz designs, respectively. The antenna possesses excellent environmental tolerance in vivo environment test. Moreover, the specific absorption rate value of the antenna can satisfy the IEEE regulations under the limit of 2.42 mW net-input power.
引用
收藏
页码：1918 / 1922
页数：5
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