Summary
International Symposium on Antennas and Propagation
2008
Session Number:4IS06b
Session:
Number:4IS06b-1
Ultra Wideband Built-in Antenna with Novel EM Coupling Feed for Mobile Phones
Byoung-Nam Kim, Seong-Ook Park, Jung-Keun Oh,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Significant growth in the wireless communication market and consumers has caused wide interests in designing wideband and multiband antennas. In addition, recent global roaming trend has increased demand for wideband antenna with shrinking the size of the mobile handset. Thus, a single handset should be able to deal with the multi-standard issue and services such as voice, data, video, broadcasting, and digital multi-media contents. As a result, the need for wireless communication handsets antenna with at least penta-band (5-band) covering GSM quad-band as well as 3G service such as WCDMA would be more popular. However, most basic PIFA elements have inherently narrow bandwidth. Especially, narrow band characteristic in low-band is a very serious problem regarding resonance-shifting due to the hand and head effects. Even though, there are the many researches based on the PIFA concepts for achieving multi-band operations, it is not easy to achieve enough bandwidth for low-band with covering penta-band or more bands simultaneously[1,2]. This paper proposes new design concepts as a miniature wideband built-in antenna with novel EM coupling feed structure which is implemented between the feed line and short line. This structure consists of the periodic distributed L-C coupling structure involving wide-band impedance matching with miniature antenna size. With this proposed novel feeding structure, a hepta-band built-in antenna with 3.8cc for covering the GSM850, GSM900, DCS, PCS, WCDMA, WIMAX2350, and Bluetooth are eventually implemented.