Multiband antenna using a half-wavelength loaded line structure for mobile handheld systems
✍ Scribed by Byungwoon Jung; Hoo Shin; Frances J. Harackiewicz; Myun-Joo Park; Byungje Lee
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 918 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A novel multiband internal antenna is proposed, which can be applied for GSM(880–960 MHz), GPS(1575.42 MHz), DCS(1710–1880 MHz), PCS(1850–1990 MHz), and WCDMA(1920–2170 MHz) band mobile handheld systems, by using a half‐wavelength loaded line structure (HWLLS). The proposed antenna is a combined structure of HWLLS and a shorted monopole. A gap is cut between the antenna shorting pad and the PCB ground plane of system. Then this gap is connected by a chip inductor in order to easily control the upper frequency bands, DCS, PCS, and WCDMA without degradation of resonant characteristics in the lower bands, GSM and GPS. Simulation and experimental results show that the proposed antenna provides enough effective bandwidth (VSWR <2.5) to cover all five bands with the peak gain variation of less than 0.53 dB with varying the chip inductance of less than 3.3 nH. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1683–1687, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21803