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Proceedings ArticleDOI

Design of a coplanar microstrip antenna for GPS/Bluetooth applications

TL;DR: Coplanar multifunctional microstrip antenna for both global positioning system (GPS) and Bluetooth application which can radiate or operates on two different frequencies simultaneously.
Abstract: Due to rapid development of wireless communication systems, various services are of very much importance in today's day-to-day life. In order to improve the utility efficiency of the limited spectra and spatial resources, different services using the same antenna are required. Such system is presented here. This paper presents coplanar multifunctional microstrip antenna for both global positioning system (GPS) and Bluetooth application. Our antenna consists of two parts: outer square ring patch antenna and centre-fed square patch antenna. Simulation results of this antenna in HFSS are also presented here. Good match is achieved between simulation results in HFSS and hardware measurement. Hence this paper emphasizes on multifunctional microstrip antenna which can radiate or operates on two different frequencies simultaneously.
References
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Book
01 Oct 2002
TL;DR: In this article, the authors provide an exhaustive coverage of broadband techniques, including the most up-to-date information to help users choose and design the optimum broadband microstrip antenna configurations without sacrificing other antenna parameters.
Abstract: Look to this new, cutting-edge microstrip antenna book for the first exhaustive coverage of broadband techniques, including the most up-to-date information to help you choose and design the optimum broadband microstrip antenna configurations for your applications, without sacrificing other antenna parameters. The book shows you how to take advantage of the lightweight, low volume benefits of these antennas, by providing clear explanations of the various configurations and simple design equations that help you analyze and design microstrip antennas with speed and confidence. This practical resource offers you a comprehensive understanding of the radiation mechanism and characteristic of microstrip antennas, and provides guidance in designing new types of planar monopole antennas with multi-octave bandwidth. You learn how to select and design proper broadband microstrip antenna configurations for compact, tunable, dual-band and circular polarization applications. Moreover, the book compares all the broadband techniques and suggests the most attractive configuration. Extensively referenced with over 300 illustrations and 140 equations.

1,436 citations

Book ChapterDOI
29 Apr 2002

566 citations

Journal ArticleDOI
TL;DR: In this paper, a novel coupling technique for circularly polarized square-ring patch antenna is developed and discussed, which is achieved by a simple microstrip feed line through the coupling of a square patch on the same plane of the antenna.
Abstract: A novel coupling technique for circularly polarized square-ring patch antenna is developed and discussed. The circular polarization (CP) radiation of the square-ring patch antenna is achieved by a simple microstrip feed line through the coupling of a square patch on the same plane of the antenna. Proper positioning of the coupling square patch excites two orthogonal resonant modes with 90deg phase difference, and a pure circular polarization is obtained. The dielectric material is a square block of ceramic with a permittivity of 58 and that reduces the size of the antenna. The prototype has been designed, fabricated and found to have an impedance bandwidth of 1.1% and a 3-dB axial-ratio bandwidth of about 0.03% at GPS frequency of 1573 MHz. The characteristics of the proposed antenna have been studied by simulation software HFSS and experiments. The measured and simulated results are in good agreement.

108 citations

Journal ArticleDOI
TL;DR: In this article, a dual-band dipole antenna for wireless local area network (WLAN) is designed and experimentally tested at both the 2.4 and 5 GHz (IEEE 802.11b/g and 802.12.11a) WLAN bands.
Abstract: A dual-band dipole antenna for wireless local area network (WLAN) is designed and experimentally tested at both the 2.4 and 5 GHz (IEEE 802.11b/g and 802.11a) WLAN bands. The design procedure involves obtaining a full resonance frequency in the 2.4 GHz band and then using a matching network to achieve a secondary resonance at the 5 GHz band. It is shown that by correctly designing the dipole, the matching network can be simplified to only one series inductor. The design was experimentally verified by constructing a dipole on a FR4 board (12 mm*45 mm*0.45 mm) and measuring its input impedance and the radiation characteristics at both bands. The measured VSWR 2:1 bandwidth in the 2.4 GHz band is 710 MHz, and the bandwidth in 5 GHz band is wider than 1 GHz. The VSWR 3:1 bandwidth is more than 3.6 GHz and it covers from 2.32 GHz to above 6 GHz. It is significant that the designed dual-band dipole maintained good radiation efficiency values at both bands. Specifically, and based on the measured radiation patterns, an efficiency value of 85% /spl sim/ 87% is obtained at 2.4 GHz and a value in the range of 55 /spl sim/ 64% is obtained in 5 GHz band.

106 citations

Journal ArticleDOI
TL;DR: This communication presents a novel design of a compact microstrip antenna practical for both the global positioning system (GPS) and digital communication system (DCS).
Abstract: This communication presents a novel design of a compact microstrip antenna practical for both the global positioning system (GPS) and digital communication system (DCS). The proposed antenna consists of two parts: a fundamental mode truncated square patch antenna and a higher-order mode annular ring patch antenna. The truncated square patch operated in right-hand circular polarization at 1575 MHz with 8-MHz CP bandwidth, making the design suitable for the GPS. Further, four slots were embedded into a ground plane to meander the current path of the annular ring patch at the TM/sub 21/ mode, which considerably lowered the resonant frequency and effectively increased the impedance bandwidth. These features reduce the antenna size and make the design appropriate for DCS. Both radiators are placed in a common space but operate independently. The experimental results show that this design is ideally suited for GPS/DCS dual-band mobile communications.

68 citations