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http://dx.doi.org/10.5515/KJKIEES.2019.30.1.1

Design Technique Using Bypass Capacitor to Improve Antenna Efficiency of Inverted-F Antenna with Band Stop Matching Circuit  

Bae, Jang Hwan (Department of Electrical Electronic Engineering, Yonsei University)
Choi, Woo Cheol (Department of Electrical Electronic Engineering, Yonsei University)
Lim, Seonho (Department of Electrical Electronic Engineering, Yonsei University)
Yoon, Young Joong (Department of Electrical Electronic Engineering, Yonsei University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.30, no.1, 2019 , pp. 1-7 More about this Journal
Abstract
In this paper, a design technique using a bypass capacitor is proposed to improve the antenna efficiency of an inverted-F antenna (IFA) with a band stop matching circuit (BSMC). The proposed antenna operates in the LTE bands 26 and 5(814~ 894 MHz). The bandwidth of the IFA is expanded from 803~863 MHz to 800~888 MHz using the impedance change caused by the BSMC. To enhance the antenna efficiency in the expanded frequency band, the bypass capacitor is applied to the IFA with the BSMC. The bypass capacitor improves the efficiency of the antenna by reducing the current variation of the IFA with the BSMC. The proposed antenna has a bandwidth of 804~895 MHz and the antenna efficiency increases by more than 10 % in the extended frequency band by using the bypass capacitor.
Keywords
Band Stop Matching Circuit; Inverted-F Antenna; Bypass Capacitor; Antenna Efficiency;
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