Summary
International Symposium on Antennas and Propagation
2008
Session Number:4IS06a
Session:
Number:4IS06a-3
Compact Multiband Antenna with a Dual-arm Monopole Structure for Mobile Phone and WiMAX Application
David DELAUNE, Ning GUAN, Koichi ITO,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Recently, multi-band and wideband operation are getting popular through the rapid development of modern wireless communication systems. For mobile phones, Global System for Mobile communications (GSM) is the most popular standard in the world. Its ubiquity makes international roaming very common between mobile phone operators, enabling subscribers to use their phones in many parts of the world. Most GSM networks operate in the 900 MHz or 1800 MHz bands. Many GSM phones support three bands (900/1800/1900 MHz or 850/1800/1900 MHz) or four bands (850/900/1800/1900 MHz) [1]. Currently, the market aiming at providing multiple services within a single communication unit, there is a greater demand for the multiband antenna such as penta-band (2100 MHz band added to the previous quad band phone) [2]. Furthermore, in the near future, mobile devices will require antennas to support communications using multiple wireless protocols [3]-[5], like the Worldwide Interoperability for Microwave Access (WiMAX) that is a telecommunications technology aimed at providing wireless high-rate data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access [6]. Consequently, in this paper, a very low profile and very small antenna (0.12 x 0.05 x 0.01 λ920, where λ920 represents the wavelength at 920 MHz) is introduced, aimed at multiband application in the mobile phone. The proposed antenna is a folded printed monopole with two branches, one of them being bent into a loop shape that enables the higher-mode resonance to be shifted towards the low frequencies, the other branch broadening the bandwidth of the higher-mode resonance. The discussed antenna can meet the demand for the current market, as well as WiMAX application, in a single unit.