Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FB1
Session:
Number:4FB1-5
Fabrication and Measurement of T-DMB/GPS/ Mobil Antenna for Vehicular Application
Seung Jae Lee, Joong Han Yoon, Young Bea Park, Jin Woo Lee, Ji Young Park, Bong Jae Hur,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
In the past, large external antennas were installed on automobiles. These were screwshaped, helical-type winding-coil antennas. The disadvantage of these antennas is that they have an individual communication function. At present, shark antennas, which are placed on the rear part of automobiles, are largely being used as automobile antennas. The additional integrated design function of a T-DMB antenna and its radio reception may have an advantage, but they cost high and have limited reception, unlike external antennas. At present, as different multimedia equipment can now be integrated into one terminal, antennas are also being developed technically to provide a simple multimedia communication environment using drivers for multiple functions. Especially in Korea, digital multimedia broadcasting (DMB) services are becoming popular. As the resonant length of the Terrestrial Digital Multimedia Broadcasting band (TDMB, 174-214MHz) is much longer than that of the conventional antenna, it is very difficult to utilize a T-DMB antenna [1]. A GPS antenna for vehicle application is also proposed and designed to generate a circular polarized antenna for GPS and ETCS. Mobile bandwidths, such as Advanced Mobile Phone System (AMPS, 824-894MHz), Global System for Mobile Communication (GSM, 890-960MHz), Digital Communication System (DCS, 1710- 1880MHz), Personal Communication System (PCS, 1850-1990MHz), and Universal Mobile Telecommunication System (UMTS, 1920-2170MHz) are necessary to communicate in vehicles. Hence, a multiband antenna for vehicle application is proposed. To meet the miniaturization and aesthetic requirements of a vehicle antenna, manufacturers are trying to come up with low profile and broadband antennas [2]. However, low profile, multiband, and integrated antenna for various services are needed. In this document, we propose an integrated antenna which is suitable for mounting on a vehicle to access mobile, T-DMB, and GPS services. Details of the proposed antenna design and experimental results are described below.