Dual-band Planar Antenna Research Articles

A Novel Dual-Band Spiral Antenna for a Satellite and Terrestrial Communication System

In this letter, a new dual-band planar spiral antenna is proposed. This antenna is realized by incorporating a finite frequency-selective surface (FSS) into a planar spiral antenna as its ground plane. Because of the added FSS, a broadband spiral antenna can be transformed into a dual-band antenna. Especially, the main-beam directions associated with these two bands can be widely separated more than 60deg. Therefore, the antenna can be simultaneously applied to satellite and ground-based communications. A prototype of this FSS-added spiral antenna was created and examined. The simulated and measured results obtained demonstrate its promising performance.

A Compact Dual-Band Planar Antenna for DCS-1900/PCS/PHS, WCDMA/IMT-2000, and WLAN Applications

A compact dual-band planar antenna developed for DCS-1900/PCS/PHS, WCDMA/IMT-2000, and WLAN applications is presented. The proposed antenna consists of a flared monopole with an additional sleeve for dual-band applications. The overall size of the antenna is 40 mm times 25 mm times 1.6 mm including the Finite Ground CPW feeding mechanism. The antenna operates in two frequency bands from 1.83 to 2.34 GHz and 3.23 to 5.76 GHz covering DCS-1900/PCS/PHS, WCDMA/IMT-2000, and WLAN bands. Simulation results along with measurements of the prototyped antenna are presented and discussed.

A New Planar Dual-Band GPS Antenna Designed for Reduced Susceptibility to Low-Angle Multipath

A new Global Positioning System (GPS) microstrip patch antenna designed for dual-band (LI /L2) operation is introduced. The antenna design is based on the reduced-surface-wave (RSW) concept and, as a result, is much less susceptible to low-angle multipath interference effects than some of the more commonly-used high-precision GPS antennas. In this paper, the radiation characteristics of this new design was compared to a dual- band choke-ring and a dual-band pinwheel antenna. In addition to having the advantages typically associated with microstrip patch antennas, this planar dual-band antenna lacks the design complications associated with the frequently-used stacked-patch method for realizing dual-band microstrip antenna performance. Thus, the simplicity of the design, together with the reduced horizon and backside radiation levels and excellent circular polarization characteristics indicate that this new antenna design is a promising candidate for dual-band, high-precision applications.

A compact dual band planar branched monopole antenna for DCS/2.4-GHz WLAN applications

A compact dual band planar antenna for a digital communication system (DCS)/2.4-GHz WLAN application is presented. The two resonant modes of the proposed antenna are associated with various length of the monopoles, in which a longer arm contributes for the lower resonant frequency and a shorter arm for higher resonant frequency. The experimental results show that the designed antenna can provide excellent performance for DCS/2.4-GHz WLAN systems, including sufficiently wide frequency band, moderate gain, and nearly omnidirectional radiation coverage. The outcome of the experimental results along with the design criteria are presented in this letter.

Design of multiband printed dipole antennas using parasitic elements

In this paper, multiband printed dipole antennas using parasitic elements are proposed for multiple wireless services. First, an elementary dipole antenna is studied and characterized at the operating frequency of 2.9 GHz. Next, two compact dual-band planar-antenna configurations are presented. The first antenna is suitable for nautical RADAR detection in both the L- and X-bands, whereas the second is suitable for Bluetooth and WiFi or WiMax applications. Finally, a triple-band printed dipole antenna with two parasitic elements is designed to operate at triple-band for IMT-2000, 5-GHz WLAN, and X-band ISM, respectively. Prototypes of the proposed antennas are constructed and tested. All the antennas have a simple geometry and can be easily fed using a 50Ω coaxial probe or directly integrated in the PC board with a microstrip line. Details of the experimental and simulation results are presented and discussed. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1639–1645, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21714

Omnidirectional planar dipole‐array antenna for 2.4/5.2‐GHz WLAN access points

AbstractAn omnidirectional dual‐band planar dipole‐array antenna suitable for application in 2.4/5.2‐GHz WLAN access points is presented. The dipole‐array antenna is a linear array and comprises three back‐to‐back dipole elements with the first two elements operating in the 5.2‐GHz band and the third one operating in the 2.4‐GHz band. The proposed array antenna is narrow in width (12 mm in this design), and good omnidirectional radiation with gain variations less than 2 dBi for both the 2.4‐ and 5.2‐GHz bands is obtained. In addition, the antenna provides enhanced antenna gain (about 3.7–4.1 dBi) for frequencies across the 5.2‐GHz band, and good antenna gain (about 2.2–2.8 dBi) is also obtained across the 2.4‐GHz band. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 33–36, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11118

New slot configurations for dual-band planar inverted-F antenna

This paper describes a novel planar dual-band inverted-F antenna (PIFA) for which the impedance bandwidth can be remarkably improved. The proposed PIFA uses a single feed only. Two top-plate geometries, an L-shaped and a novel U-shaped slot, are discussed. An example for both slot shapes is given for frequency bands of 2.4 and 5.2 GHz. Simulation based upon the method of moments is used to model the performance of the antennas. Comparisons with measured results on fabricated antenna structures are provided for simulation validation. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 28: 293–298, 2001.

Dual-frequency planar inverted-F antenna

Cellular telephone handsets are now being designed to have dual-mode capabilities. In particular, there is a requirement for internal antennas for GSM and DCS1800 systems. This paper describes a novel planar dual-band inverted-F antenna for cellular handsets, which operates at the 0.9-GHz and 1.8-GHz bands. The dual-band antenna has almost the same size as a conventional inverted-F antenna operating at 0.9 GHz and has an isolation between bands of better than 17 dB. The bandwidths of the antenna are close to those required for the above systems. Good dual-band action is also obtained for other frequency ratios in the range of 1.3-2.4. Studies also show that the dual-band antenna can operate with one or two feeds. A finite-difference time-domain analysis has been shown to give calculated results close to those measured.