Compact monopole with a band‐stop matching circuit for LTE/WWAN smartphone. Issue 10 (26th September 2018)

• Record Type: Journal Article
• Authors: Shen, Dong‐Lin; Zhang, Li; Weng, Zi‐Bin; Chen, Chu‐Hui; Jiao, Yong‐Chang
• Is Part Of: Microwave and optical technology letters. Volume 60:Issue 10(2018:Oct.)
• Page Start: 2357
• Page End: 2363
• Publication Date: 2018-09-26
• Subjects: band‐stop matching circuit -- compact size -- coupling feed -- LTE/WWAN; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.31365
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: An LTE/WWAN monopole antenna with a compact size of 12.5× 28.7 mm 2 for smartphone applications is designed. The antenna is formed by an L‐shape driven branch, a parasitic shorting branch, and a band‐stop matching circuit. By capacitive coupling and loading a matching circuit, the antenna generates four resonant modes in the working bands. The band‐stop matching circuit is applied to enlarge the bandwidth of the low working band. The measured −6 dB impedance bandwidth of the presented antenna ranges from 683 MHz to 962 MHz and from 1632 MHz to 2710 MHz, covering LTE/WWAN eight‐band operation. Acceptable radiation performances are achieved over the working bands. The measured efficiencies are 45.4%‐61.2% and 44.5%‐66.4% and the measured gains are −0.6 dBi‐2.0 dBi and 0.07 dBi‐2.69 dBi in the low and high working band, respectively.