Showing papers on "Folded inverted conformal antenna published in 1985"
TL;DR: In this article, the authors determined the input impedance and bandwidth of an annular ring microstrip antenna by modeling the antenna as a section of radial line loaded with wall admittances and taking the effect of mutual coupling between the radiating apertures into account.
Abstract: Input impedance and bandwidth of an annular ring microstrip antenna have been determined by modeling the antenna as a section of radial line loaded with wall admittances. The effect of mutual coupling between the radiating apertures has been taken into account. The theoretically calculated values of input impedance for TM 12 -mode are compared with measurements. The agreement is good. Higher order modes have been found to be present in the vicinity of TM 12 -mode. The reactance due to these modes can be utilized to increase the voltage standing-wave ratio (VSWR) bandwidth of the antenna.
102 citations
TL;DR: In this paper, a set of simple formulas and graphs for calculating both the radiation pattern bandwidth and the impedance bandwidth of a rectangular microstrip antenna are presented with experimental verification based on the cavity model theory.
Abstract: Based on the cavity model theory, a set of simple formulas and graphs for calculating both the radiation pattern bandwidth and the impedance bandwidth of a rectangular microstrip antenna are presented with experimental verification. Three kinds of approaches to broaden the bandwidth and their potentiality are reviewed and discussed. A simple broadband technique by means of combination of stub-matching and increasing the antenna thickness is developed. An experimental element with the thickness of 0.05 wavelength is matched by using two stubs, while the input VSWR is measured to be less than 2:1 over a 13% bandwidth.
3 citations
TL;DR: In this paper, the synthesis of conformal antenna arrays that yield a radiation pattern which is optimum in the sense that the radiation intensity is the greatest in a prescribed direction, for a given source norm, has been discussed.
Abstract: Synthesis of conformal antenna arrays that yield a radiation pattern which is optimum in the sense that the radiation intensity is the greatest in a prescribed direction, for a given source norm, has been discussed. Optimum radiation patterns have been obtained for arrays which are conformal to certain surfaces.
1 citations
TL;DR: In this article, the effects of fields which penetrate from underneath a microstrip patch antenna to the top of the patch can affect the resonance condition for this antenna, and the authors present an analysis of a one-dimensional microstrip resonator where top-side effects are accounted for.
Abstract: The effects of fields which penetrate from underneath a microstrip patch antenna to the top of the patch can affect the resonance condition for this antenna. Previous cavity models for the rectangular patch have ignored this effect. In this paper, we present an analysis of a one-dimensional microstrip resonator where topside effects are accounted for. The influences on the unloaded radiation Q and on the resonant frequency are examined as functions of the substrate permittivity.
1 citations
17 Jun 1985
1 citations