A Compact and Low-Profile Loop Antenna With Multiband Operation for Ultra-Thin Smartphones

Author

Di Wu ; Cheung, S.W. ; Yuk, T.I.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China

Volume

63

Issue

6

fYear

2015

fDate

42156

Firstpage

2745

Lastpage

2750

Abstract

A folded loop antenna having a very compact size of 5 × 8 × 60 mm³ with multiband operation for ultra-thin smartphone applications is proposed. The antenna generates four resonant modes, the traditional 0.5-λ, 1-λ, and 1.5-λ resonant modes and an extra higherorder 2-λ resonant mode, to cover the GSM850, GSM900, DCS1800, PCS1900, UMTS, TD-SCDMA, LTE2300, and WLAN systems. The extra 2-λ resonant mode is generated using a certain distance between the feed point and the shorting point on the ground plane. The antenna is studied using simulation and measurement. To study the antenna in a more realistic situation, a standard metallic USB connector is placed inside the loop radiator. Results show that the USB connector has little effects on the antenna performance.

Keywords

3G mobile communication; Long Term Evolution; cellular radio; mobile antennas; smart phones; wireless LAN; DCS1800; GSM850; GSM900; LTE2300; PCS1900; TD-SCDMA; UMTS; WLAN systems; antenna performance; compact antenna; folded loop antenna; low-profile loop antenna; metallic USB connector; multiband operation; resonant modes; ultra-thin smartphone; ultra-thin smartphones; Antenna measurements; Antenna radiation patterns; Bandwidth; Connectors; Mobile antennas; Universal Serial Bus; Loop antenna; loop antenna; mobile antennas; multiband antenna; multimode antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2412962

Filename

7061446