CPW-fed circular disc monopole antenna for UWB applications
07 Mar 2005-pp 505-508
TL;DR: In this paper, a coplanar waveguide (CPW) fed circular disc monopole antenna for ultra wideband (UWB) applications was proposed and demonstrated numerically and experimentally to yield an ultra wide -10 dB bandwidth with omnidirectional radiation patterns over the entire bandwidth.
Abstract: This paper proposes and studies a novel design of a coplanar waveguide (CPW) fed circular disc monopole antenna for ultra wideband (UWB) applications. A circular disc monopole printed on a dielectric substrate and fed by a 50 /spl Omega/ CPW on the same layer is demonstrated numerically and experimentally to yield an ultra wide -10 dB bandwidth with omnidirectional radiation patterns over the entire bandwidth. The effect of the disc dimension on the antenna performance is also investigated.
Citations
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TL;DR: In this article, the authors presented novel circular and elliptical coplanar waveguide (CPW)-fed slot and mictrostip-fed antenna designs targeting the 3.1?10.6 GHz band.
Abstract: This letter presents novel circular and elliptical coplanar waveguide (CPW)-fed slot and mictrostip-fed antenna designs targeting the 3.1?10.6 GHz band. The antennas are comprised of elliptical or circular stubs that excite similar-shaped slot apertures. Four prototypes have been examined, fabricated and experimentally tested, the three being fed by a CPW and the fourth by a microstrip line, exhibiting a very satisfactory behavior throughout the 7.5 GHz of the allocated bandwidth in terms of impedance matching $(hbox VSWR?2)$, radiation efficiency and radiation pattern characteristics. Measured impedance bandwidths of beyond 175% will be presented.
224 citations
Cites background or methods from "CPW-fed circular disc monopole ante..."
...Alternatively, by using CPW to feed circular monopoles [3], U-shaped stubs [4], or curved exotic configura-...
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...It can be deduced that these types of radiators demonstrate approximately the impedance characteristics of a UWB monopole fed by a CPW, as has been already presented in [3]....
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TL;DR: In this article, a new ultrawideband antenna is presented, and the fractal structure is used to obtain such a wideband feature, the parameters and the characteristics of the antenna are given.
Abstract: A new ultrawideband antenna is presented in this letter, and the fractal structure is used to obtain such a wideband feature. The parameters and the characteristics of the antenna are given. The simulated and the measured results show that a bandwidth larger than 6:1 is achieved. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 173–176, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22078
71 citations
Dissertation•
01 Jan 2006
TL;DR: In this article, two more compact versions featuring low profile and compatibility to printed circuit board are proposed and studied based on the understanding of vertical disc monopole, and two different types of antennas are investigated in both frequency domain and time domain.
Abstract: Since the release by the Federal Communications Commission (FCC) of a bandwidth of 7.5GHz (from 3.1GHz to 10.6GHz) for ultra wideband (UWB) wireless communications, UWB is rapidly advancing as a high data rate wireless communication technology. As is the case in conventional wireless communication systems, an antenna also plays a very crucial role in UWB systems. However, there are more challenges in designing a UWB antenna than a narrow band one. A suitable UWB antenna should be capable of operating over an ultra wide bandwidth as allocated by the FCC. At the same time, satisfactory radiation properties over the entire frequency range are also necessary. Another primary requirement of the UWB antenna is a good time domain performance, i.e. a good impulse response with minimal distortion. This thesis focuses on UWB antenna design and analysis. Studies have been undertaken covering the areas of UWB fundamentals and antenna theory. Extensive investigations were also carried out on two different types of UWB antennas. The first type of antenna studied in this thesis is circular disc monopole antenna. The vertical disc monopole originates from conventional straight wire monopole by replacing the wire element with a disc plate to enhance the operating bandwidth substantially. Based on the understanding of vertical disc monopole, two more compact versions featuring low-profile and compatibility to printed circuit board are proposed and studied. Both of them are printed circular disc monopoles, one fed by a micro-strip line, while the other fed by a co-planar waveguide (CPW). The second type of UWB antenna is elliptical/circular slot antenna, which can also be fed by either micro-strip line or CPW. The performances and characteristics of UWB disc monopole and elliptical/circular slot i antenna are investigated in both frequency domain and time domain. The design parameters for achieving optimal operation of the antennas are also analyzed extensively in order to understand the antenna operations. It has been demonstrated numerically and experimentally that both types of antennas are suitable for UWB applications.
70 citations
TL;DR: In this article, a planar monopole antenna of size 17 × 10 × 1 mm3 has been proposed for low temperature coflred ceramic technology for integration with ultrawideband radios.
Abstract: The miniaturization is described of a beveled planar monopole antenna in low temperature coflred ceramic technology for integration with ultrawideband radios. We demonstrate through simulations that a 40% reduction in size can be realized by simply exploiting its structural symmetry. We find that the miniaturized beveled planar monopole antenna exhibits wider impedance bandwidth, higher cross-polar radiation, and slightly lower gain at higher frequencies as compared with its un-miniaturized counterpart. We confirm the miniaturization with the measurements of both un-miniaturized and miniaturized beveled monopole antennas. The miniaturized beveled monopole antenna of size 17 × 10 × 1 mm3 has achieved impedance bandwidth of 8.25 GHz from 2.85 to 11.1 GHz, gain from -5.6 to 2.3 dBi, and broad patterns. Both frequency domain and time domain characteristics of the beveled monopole antennas are also carefully investigated with a normalized measured transfer function.
69 citations
Cites background from "CPW-fed circular disc monopole ante..."
...Among them, the planar monopole antenna has become the choice of antennas for UWB radios due to its attractive merits, such as theultrawidebandcharacteristic,nearomnidirectionalradiation patterns,simplestructureandlowcost[5].Theplanarmonopole antenna in low temperature cofired ceramic (LTCC) is particularly interesting because it offers the possibility of the singlepackage solution of UWB radios [6]‐[ 13 ]....
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...For example [ 13 ] shows a4 7 40 1.6 mm circular disc symmetrical antenna in PCB and [5] shows a 47 40 1.6 mm beveled symmetrical antenna in FR4 PCB....
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TL;DR: In this article, the performance of some space-filling monopole antennas with coplanar waveguide have been investigated. And a new version of Gosper curve patch antenna is introduced and its performance has been compared to conventional Gosper Curve Patch antenna.
Abstract: In this paper, the performances of some space-filling monopole antennas with coplanar waveguide have been investigated. It may be contended that the bends and corners of these geometries would add to the radiation efficiency of the antenna, thereby improving its gain. Advantage of these configurations is that they lead to mutiband conformal antennas. A new version of Gosper curve patch antenna is introduced and its performance has been compared to conventional Gosper curve patch antenna.
55 citations
Cites background from "CPW-fed circular disc monopole ante..."
...In other hand, coplanar waveguide feed is a well-known technique for increasing the bandwidth of patch antennas [5]....
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References
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TL;DR: In this article, a simple formula is proposed to predict the frequency corresponding to the lower edge of the bandwidth for each of these configurations, including square, rectangular, and hexagonal disc monopole antennas.
Abstract: The circular disc monopole (CDM) antenna has been reported to yield wide-impedance bandwidth. Experiments have been carried out on a CDM that has twice the diameter of the reported disc with similar results. New configurations are proposed such as elliptical (with different ellipticity ratios), square, rectangular, and hexagonal disc monopole antennas. A simple formula is proposed to predict the frequency corresponding to the lower edge of the bandwidth for each of these configurations. The elliptical disc monopole (EDM) with ellipticity ratio of 1.1 yields the maximum bandwidth from 1.21 GHz to more than 13 GHz for voltage standing wave ratio (VSWR)<2.
866 citations
TL;DR: The planar monopole antenna is shown to provide extremely wideband impedance characteristics and the radiation performance is also shown to be acceptable over a wide frequency range.
Abstract: The planar monopole antenna is shown to provide extremely wideband impedance characteristics. Recently, many techniques to tailor and optimize the impedance bandwidth of these antennas have been investigated. These include the use of bevels, slots and shorting posts. These antennas are becoming popular, and have been proposed for modern and future wideband wireless applications. The radiation performance is also shown to be acceptable over a wide frequency range.
382 citations
TL;DR: In this paper, a printed circular disc monopole antenna for ultra-wideband applications is presented, and the parameters which affect the performance of the antenna are investigated. Good agreement is achieved between simulation and experiment.
Abstract: A novel and simple design of a printed circular disc monopole antenna for ultra-wideband applications is presented. The parameters which affect the performance of the antenna are investigated. Good agreement is achieved between simulation and experiment.
314 citations
19 Dec 2005
TL;DR: In this article, a coplanar waveguide (CPW) fed circular disc monopole antenna for ultra wideband (UWB) applications is presented, and the performance and characteristics of the antenna are investigated in order to understand its operation.
Abstract: The paper presents a study of coplanar waveguide (CPW) fed circular disc monopole antenna for ultra-wideband (UWB) applications. A circular disc monopole printed on a dielectric substrate and fed by a 50 /spl Omega/ CPW on the same layer can yield an ultra-wide -10 dB return loss bandwidth with satisfactory radiation patterns. The performance and characteristics of the antenna are investigated in order to understand its operation. Good agreement has been obtained between the simulation and experiment.
279 citations
TL;DR: In this paper, a square planar monopole antenna with two feed points and a bevelled variant is designed to improve pattern and impedance bandwidth, and these antennas exhibit an excellent performance compared to existing planar mono-mono antennas.
Abstract: Planar monopole antennas with multiple feed points are proposed to improve pattern and impedance bandwidth. A square planar monopole antenna including two feed points and a bevelled variant are designed. These antennas exhibit an excellent performance compared to existing planar monopoles.
246 citations