Journal ArticleDOI
Dual-band reactively loaded microstrip antenna
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TLDR
In this article, a model consisting of a rectangular patch radiator loaded with a variable length short-circuited coaxial stub was investigated experimentally, and a comparison of theoretical predictions and experimental data were made for the impedance and resonant frequencies as a function of the position of the load, the length of the stub, and the characteristic impedance.Abstract:
A previously derived theory is applied to a microstrip antenna with a reactive load to produce a dual-band radiator. A model consisting of a rectangular patch radiator loaded with a variable length short-circuited coaxial stub was investigated experimentally. Comparisons of theoretical predictions and experimental data are made for the impedance and resonant frequencies as a function of the position of the load, the length of the stub, and the characteristic impedance of the stub.read more
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Phased Array Antenna Handbook
TL;DR: Details of Element Pattern and Mutual Impedance Effects for Phased Arrays and Special Array Feeds for Limited Field of View and Wideband Arrays are presented.
Journal ArticleDOI
Dual-frequency patch antennas
Stefano Maci,Guido Biffi Gentili +1 more
TL;DR: In this paper, a critical overview of possible solutions for dual-frequency patch antennas is presented, and future perspectives are outlined, in particular geometric and spectral properties of patch antennas are discussed.
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An experimental investigation of electrically thick rectangular microstrip antennas
TL;DR: In this paper, the electromagnetic properties of rectangular microstrip antennas were investigated experimentally, and the bandwidth was calculated as a function of electrical thickness and the antenna radiation patterns were measured.
Journal ArticleDOI
Dual-frequency stacked annular-ring microstrip antenna
TL;DR: In this paper, a dual-frequency microstrip antenna consisting of two stacked annular rings of outer radii 5 cm and inner radii 2.5 cm was constructed on a Duroid substrate with relative permittivity 2.32 and thickness 0.159 cm.
Journal ArticleDOI
A Dual-Band Circularly Polarized Stub Loaded Microstrip Patch Antenna for GPS Applications
TL;DR: In this paper, a single-feed low-profile and easy to fabricate circularly polarized microstrip patch antenna has been developed for GPS applications, where four slots are etched near edges of the patch and a crossed slot etched in the center for generating circular polarization.
References
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Journal ArticleDOI
An improved theory for microstrip antennas and applications
W. Richards,Y.T. Lo,D. Harrison +2 more
TL;DR: In this paper, an improvement to a recently reported theory for the analysis of the pattern and impedance loci of microstrip antennas is developed, which yields a theory which is simple and inexpensive to apply.
ReportDOI
An Improved Theory for Microstrip Antennas and Applications. Part I.
TL;DR: In this article, an improvement to a recently reported theory for the analysis of the pattern and impedance loci of microstrip antennas is developed, which yields a theory which is simple and inexpensive to apply.
Journal ArticleDOI
Microstrip antennas with frequency agility and polarization diversity
TL;DR: In this paper, a technique for controlling the operating frequency and polarization of microstrip antennas is proposed, which is achieved by placing shorting posts at appropriate locations within the antenna's boundaries.
Journal ArticleDOI
A dual-frequency stacked circular-disc antenna
Stuart A. Long,M. Walton +1 more
TL;DR: In this paper, the dual-frequency behavior of a pair of stacked circular-disc printed-circuit antennas is investigated experimentally and the input impedance is measured as a function of the sizes of the discs with emphasis placed on the values of the two resultant resonant frequencies.
Journal ArticleDOI
Theoretical and experimental investigation of a microstrip radiator with multiple lumped linear loads
W. Richards,Y.T. Lo +1 more
TL;DR: In this paper, a simple theory is developed for the analysis of microstrip patch elements which are loaded at one or more points with lumped linear load impedances, based on a cavity model in which the shape of the field distribution between the patch and ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic-and electric-walled cavity.