Summary
International Symposium on Antennas and Propagation
2013
Session Number:WP-1(D)
Session:
Number:WP-1(D)-5
Printed Loop Antenna with an Inductively Coupled Branch Strip for Small-Size LTE/WWAN Tablet Computer Antenna
Meng-Ting Chen, Kin-Lu Wong,
pp.-
Publication Date:2013/10/22
Online ISSN:2188-5079
DOI:10.34385/proc.54.WP-1(D)-5
Summary:
The technique of using an inductively coupled branch strip for bandwidth enhancement of a simple printed loop antenna to achieve small size yet multiband operation to cover the LTE/WWAN bands (704~960 and 1710~2690 MHz) in the tablet computer is presented. The antenna’s metal pattern occupies a small area of 10 x 34.5 mm2 , and is printed on a thin FR4 substrate. The branch strip can cause an additional resonance and thereby greatly widens the antenna’s low-band bandwidth to cover the 704~960 MHz band for the LTE700/GSM850/900 operations. While in the antenna’s higher band, the chip inductor provides a high inductance and limits the excitation of the branch strip. In this case, with the printed loop antenna excited in the higher band, the antenna can generate two higher-order resonant modes to form a wide operating band for the GSM1800/1900/ UMTS/LTE2300/2500 operations (1710~2690 MHz).