Summary
International Symposium on Antennas and Propagation
2008
Session Number:4IS06a
Session:
Number:4IS06a-5
Design of an ENG-ZOR multiband antenna for GPS and WLAN MIMO system
Jeongpyo Kim, Haeil Chung, Jaehoon Choi,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
The rapid progress in personal and computer communication technologies demands integration of more than one communication system into a single compact module. To comply with this requirement compact high-performance multiband antennas with good radiation characteristics are needed. Various antennas were introduced for the global positioning system (GPS), the wireless local network area (WLNA) and mobile communication services [1-3]. The GPS and WLAN antennas are usually fabricated on a substrate with high dielectric constant to achieve the compact size. Recently, small antennas using meta-material techniques were introduced [4-5]. These antennas were constructed by a double negative zeroth order resonator (DNG-ZOR) [4] or an epsilon negative zeroth order resonator (ENG-ZOR) [5]. The performance of a ZOR utilizing the ENG unit cell was demonstrated by using an infinitesimal circuit model. The ENG-ZOR and the DNG-ZOR have the same zeroth-order resonance frequency where the permittivity of each ZOR is zero [5]. We propose an ENG-ZOR multiband antenna for GPS and WLAN MIMO systems. The proposed antenna consists of a dual band antenna for GPS and WLAN bands, a single band antenna for WLAN band, and a hairpin resonator to improve the isolation characteristic between the two antennas. Two antennas are fabricated by utilizing three ENG-ZOR unit cells with size of 5 mm × 5 mm. The dual band antenna has very compact size of 5 mm × 5 mm × 5 mm and the total volume of the antenna including the second WLAN antenna for MIMO is 40 mm × 5 mm × 5 mm.