Showing papers on "Folded inverted conformal antenna published in 1983"
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TL;DR: In this paper, a single-element rectangular microstrip antenna which can operate simultaneously for two different frequency bands is described, and the antenna can operate at different frequencies for different applications.
Abstract: The letter describes a single-element rectangular microstrip antenna which can operate simultaneously for two different frequency bands.
121 citations
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TL;DR: In this article, the validity of using planar antenna patches to characterize microstrip antennas is examined, including the simplest planar patch modes having no field variation normal to the patch surface.
Abstract: Resonant frequencies f_{r} of a cylindrical-rectangular microstrip antenna are theoretically calculated. Comparison is made to f_{r} for a planar rectangular patch antenna, including the simplest planar patch modes having no field variation normal to the patch surface. The validity of using planar antenna patches to characterize microstrip antennas is examined.
109 citations
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TL;DR: In this paper, the effect of substrate thickness on the characteristics of a circular disk microstrip antenna is examined and experimental results explicitly showing the effect on resonant frequency, input impedance, and bandwidth are provided.
Abstract: The effect of substrate thickness on the characteristics of a circular-disk microstrip antenna is examined. In the literature this effect has been dealt with theoretically, but experimental results explicitly showing the effect of substrate thickness on resonant frequency, input impedance, and bandwidth do not seem to be readily available.
54 citations
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TL;DR: In this article, an approximate expression for the resonant frequency of a rectangular patch antenna is derived, which shows explicitly the dependence of the resonance frequency on the characteristic parameters of the antenna and the accuracy of the expression is established by comparing the theoretical results with available measured results.
Abstract: An approximate expression is derived for the resonant frequency of a rectangular patch antenna. It shows explicitly the dependence of the resonant frequency on the characteristic parameters of the antenna. Accuracy of the expression is established by comparing the theoretical results with available measured results.
40 citations
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TL;DR: A modular approach is utilized in which a given antenna is used as a building block for higher gain antennas, and the results seem to validate the usefulness of the method.
Abstract: A method for the design of medium gain (15-25 dB) microstrip array antennas is described. A modular approach is utilized in which a given antenna is used as a building block for higher gain antennas. A series of X -band antennas were built in this way, and the results seem to validate the usefulness of the method.
30 citations
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01 Jan 1983
TL;DR: In this paper, a multi-element microstrip antenna applicator for microwave local hyperthermia is described and the design criteria for such a micro-strip antenna array are presented.
Abstract: A multi-element microstrip antenna applicator designed for microwave local hyperthermia is described Design criteria for such a microstrip antenna array are presented Various antennas were built and compared Experimental measurements of heating patterns show the multiple microstrip spiral antenna provides controlled heating over a large area
24 citations
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23 May 198317 citations
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22 Jun 1983
TL;DR: In this paper, a terminated, end-fed inverted V antenna provides continuous coverage over the 1.8 to 30 MHz frequency range, and a special matching transformer is an integral part of the antenna system.
Abstract: A terminated, end-fed inverted V antenna provides continuous coverage over the 1.8 to 30 MHz frequency range. A special matching transformer is an integral part of the antenna system.
7 citations
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19 Dec 1983
TL;DR: In this article, a dual-mode broad band antenna with four wire radiators in the form of an inverted conical log-spiral supported in a vertically extending fashion a predetermined distance above the horizontal ground plane is described.
Abstract: A dual mode broad band antenna especially designed to provide simultaneously high and low angle radiation patterns relative to a horizontal ground plane is disclosed herein. This particular antenna utilizes four wire radiators in the form of an inverted conical log-spiral supported in a vertically extending fashion a predetermined distance above the horizontal ground plane. In order to operate the antenna in its high and low angle modes simultaneously, first and second oppositely phased AC currents are applied to the radiators in two different ways through specifically connected hybrid isolating transformers.
7 citations
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01 Apr 1983TL;DR: In this paper, a modified form of a microstrip circular patch antenna is presented by slightly depressing the patch configuration conically into the substrate, and theoretical analysis predicts the bandwidth of such an antenna to be much higher than that of an identical circle patch antenna with little change in the resonant frequency.
Abstract: A modified form of a microstrip circular patch antenna is presented by slightly depressing the patch configuration conically into the substrate. The theoretical analysis predicts the bandwidth of such an antenna to be much higher than that of an identical circular patch antenna with little change in the resonant frequency. The theoretical findings are supported by experimental observations. Theoretical and observed radiation patterns of practical antennas are also presented.
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TL;DR: In this article, a suspended patch antenna excited by an inverted microstrip line is analyzed by a spectral domain technique followed by an equivalent waveguide-to-cavity model.
Abstract: A suspended patch antenna excited by an inverted microstrip line is analyzed by a spectral domain technique followed by an equivalent waveguide-to-cavity model. Accuracy of the results is confirmed by comparison with experimental data.
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TL;DR: In this article, a dual-feed dual-frequency microstrip antenna with a VSWR of 1.33 at 2.32 GHz and 1.12 at 9.425 GHz is presented.
Abstract: A single-feed dual-frequency microstrip antenna is reported. It can be impedance-matched independently at the two frequencies of operation. The tested antenna has a VSWR of 1.33 at 2.32 GHz and 1.12 at 9.425 GHz. The configuration reported here can be impedance matched over a wider frequency range using standard impedance-matching techniques.