An internal octa‐band printed antenna for mobile phones LTE applications

Abstract

A novel compact internal antenna combining a monopole and a parasitic planar inverted‐F antenna type of structure is presented. Based on voltage standing wave ratio <3:1, the operation bandwidths are 42% from 704 to 1083 MHz and 57.7% from 1660 to 3000 MHz to cover LTE700/GSM850/900/DCS1800/PCS1900/UMTS/LTE2300/LTE2500 for mobile phones. The proposed antenna is designed and printed on printed circuit board with compact size of 60 × 15 × 1.2 mm3. Measured average low band efficiency is about 60% and high band efficiency is about 70%. The simulated specific absorption rate at required frequency is less than 1.0 mW/g. Both antenna size and performance showed that this antenna has great potential for slim phone applications. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:247–252, 2015

Compact monopole with a band‐stop matching circuit for LTE/WWAN smartphone

“…The wideband internal planar antenna printed on the circuit board directly is promising for applications of thin-profile mobile phones since it is easy to fabricate and occupies a smaller space compared to the antenna whose structure is three-dimensional. [1][2][3][4][5][6] Some design schemes for internal planar antennas of mobile phones have been presented by researchers, [7][8][9][10][11][12][13][14][15][16] but only a part of these can cover LTE/WWAN eight-band completely, and they all occupy a relatively large area. [10][11][12][13][14][15][16] A T-shape monopole antenna with a size of 17 × 58 mm 2 was presented in ref.…”