Showing papers on "Folded inverted conformal antenna published in 1986"
TL;DR: In this article, an analytical expression for the resonant frequency of a rectangular patch antenna is given, which shows explicitly the dependence of the resonance frequency on the characteristic parameters of a patch antenna, and a method is developed for the measurement of the dielectric constant of a thin slab substrate.
Abstract: An analytical expression is given for the resonant frequency of a rectangular patch antenna. It shows explicitly the dependence of the resonant frequency on the characteristic parameters of a patch antenna. Based on this result, a new method is developed for the measurement of the dielectric constant of a thin slab substrate. Basically, the test equipment consists of a rectangular microstrip antenna the patch of which is fed either by a microstrip line or coaxial line. From the measured resonance parameters of the rectangular patch antenna, the dielectric constant can be easily obtained. The measured values of the present method are in agreement with the precision standard cavity resonator method. Accuracy of the dielectric constant so obtained is satisfactory.
49 citations
TL;DR: In this paper, a microstrip antenna on one substrate is coupled through an electrically small aperture to a micro-strip feed line on a perpendicularly oriented substrate, which allows two separate substrates to be used for the antenna and feed functions.
Abstract: A new technique is described for feeding printed antennas. A microstrip antenna on one substrate is coupled through an electrically small aperture to a microstrip feed line on a perpendicularly oriented substrate. No direct connection is made to the patch. Such a geometry allows two separate substrates to be used for the antenna and feed functions. Measurements of a prototype design are presented.
40 citations
TL;DR: In this article, a radioelectric model is presented to explain the bandwidth of a microstrip antenna by overlaying a parasitic element, which increases the antenna bandwidth and decreases the radiation resistance.
Abstract: The bandwidth of a microstrip antenna can be increased by overlaying a parasitic element. A radioelectric model is presented to explain this property. A quadratic patch fed by a microstrip line is coupled with a square director. Theory shows that the whole antenna bandwidth is increased and the radiation resistance is decreased. Theoretical and experimental results are in good agreement.
23 citations
Patent•
28 Apr 1986
TL;DR: A microstrip tee-fed slot antenna as discussed by the authors is made up of only a single printed circuit board having the tee feed and slot on the front side and a microstrip transmission line feed on the back side.
Abstract: A microstrip tee-fed slot antenna is made up of only a single printed circuit board having the tee feed and slot on the front side and a microstrip transmission line feed on the back side. A plurality of holes in the board surrounding the slot are electrically connected front to back to provide the antenna cavity. Since only a single board is used having all of the components of the antenna on either side, no disassembly is required to add to or modify the elements of the antenna.
17 citations
08 Jun 1986
9 citations
TL;DR: In this article, a pentagonal microstrip antenna is transformed into a circular micro-strip antenna by conformal mapping, and the formulas of the radiation field and the patterns of the antenna are compared with experimental results.
Abstract: A pentagonal microstrip antenna is transformed into a circular microstrip antenna by conformal mapping, so that we obtain the formulas of the radiation field and patterns of the pentagonal microstrip antenna, which will be compared with experimental results.
6 citations
08 Jun 1986
1 citations