Showing papers on "Folded inverted conformal antenna published in 1984"
TL;DR: In this paper, an analysis for three related shapes of microstrip antenna elements: the annular, annular sector, and circular sector is presented, which involves the full expansion of resonant modes within the cavity formed by the radiating patch and the ground plane.
Abstract: An analysis is presented for three related shapes of microstrip antenna elements: the annular; annular sector; and circular sector. The method of analysis involves the full expansion of resonant modes within the cavity formed by the radiating patch and the ground plane. Experimental results for representative radiators are also included for comparison.
68 citations
TL;DR: In this paper, an analysis method is presented for an arbitrarily shaped microstrip antenna with multiterminals, based on the variational method and the modal-expansion technique.
Abstract: An analysis method is presented for an arbitrarily shaped microstrip antenna with multiterminals. The method is based on the variational method and the modal-expansion technique. Eigenvalues and eigenfunctions are determined using the Rayleigh-Ritz method. Input impedance and other antenna parameters are derived at nonresonance. Furthermore, the network model, useful for the network analysis of a microstrip antenna with multiterminals, is presented by introducing an ideal transformer. Finally, numerical examples are compared with experimental results. The agreement is quite good, and the validity of the present method is confirmed.
46 citations
TL;DR: In this article, a microstrip array with mutual coupled rectangular patch radiators is described, and experimental results are presented for both linearly and circularly polarised antennas which demonstrate the usefulness of this special antenna configuration.
Abstract: A microstrip array with mutual coupled rectangular patch radiators is described. By the avoidance of a corporate feeding network, advantages in the antenna performance and design are realisable. Experimental results are presented for both linearly and circularly polarised antennas which demonstrate the usefulness of this special antenna configuration.
25 citations
25 Jun 1984
10 citations
25 Jun 1984
8 citations
Journal Article•
5 citations
25 Jun 1984
2 citations
TL;DR: In this paper, the wave resistance and the effective dielectric constant of the microstrip dipole antenna in the mixed Dielectric medium were derived assuming a quasi-TEM mode of wave propagation.
Abstract: Assuming a quasi-TEM mode of wave propagation and using a conformal transformation technique, accurate and simple analytic expressions for the characteristic wave resistance and the effective dielectric constant of the microstrip dipole antenna in the mixed dielectric medium have been derived. The theoretical values are in close agreement with the experimental results.
1 citations
19 Nov 1984
TL;DR: In this paper, the effects of mutual coupling, feedline discontinuities and feed point location on the input impedance and radiation pattern were assessed and a number of single patch and module structures were constructed and measured at an operating frequency of approximately 4.0 GHz.
Abstract: The physical layout of the array elements and the proximity of the microstrip feed network makes the input impedance and radiation pattern values dependent upon the effects of mutual coupling, feedline discontinuities and feed point location. The extent of these dependences was assessed and a number of single patch and module structures were constructed and measured at an operating frequency of approximately 4.0 GHz. The empirical results were compared with the ones which were theoretically predicted by the cavity model of thin microstrip antennas. Each element was modelled as an independent radiating patch and each microstrip feedline as an independent, quasi-TEM transmission line. The effects of the feedline discontinuities are approximated by lumped L-C circuit models.