Results 211 to 220 of about 771,291 (252)

Cavity backed antennas with multilayer superstrates

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229), 2002
A superstrate (cover) dielectric or magnetic layers are often used to protect low profile conformal antennas, such as cavity backed antennas from environmental hazards. In this paper, the hybrid FEM/MoM is been used to handle any aperture configuration backed by arbitrary shaped and filled (with general anisotropic material) cavities with multilayered ...
M.N. Vouvakis, A.C. Polycarpou, C.A. Balanis   +2 more
openaire   +1 more source

Cavity-backed cylindrical wraparound antennas

2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2009
This paper presents a method of moments analysis of cavity backed cylindrical wraparound antennas. It shows results for radiation pattern and input impedance, and compares them with those for similar geometries. The effects of the cavity are evaluated.
T. B. Ventura, O. M. C. Pereira-Filho, C. G. do Rego   +2 more
openaire   +1 more source

Cavity-Backed Aperture Antennas with Dielectric and Magnetic Overlay

IEEE Transactions on Antennas and Propagation, 1995
A method is presented for a full wave analysis of an aperture antenna backed by a rectangular cavity. The antenna may be covered by one or more dielectric and magnetic layers. The aperture antenna may be arbitrarily shaped but must be small compared to the cross section of the cavity.
E.M. Biebl, G.L. Friedsam
openaire   +1 more source

Coaxial‐fed cavity‐backed slot antenna

Microwave and Optical Technology Letters, 1997
This article presents an analysis of a coaxial-fed cavity-backed slot antenna. The electric field distribution along the slot is solved by Galerkin's method with the use of a sinusoidal function. The input impedance is obtained with the use of the complex Poynting theorem in which power flowing out from the cavity is calculated in the spectral domain ...
The Nan Chang, Liang Chen Kuo, Ming Lin Chuang   +2 more
openaire   +2 more sources

Antenna on Cavity Backed High Impedance Surface

IEEE Transactions on Antennas and Propagation, 2017
A low profile ( $0.019\lambda$ ), lightweight, linearly polarized antenna has been designed for 0.9 GHz applications using a double layered via-less high impedance surface (HIS). The weight of the antenna is reduced by removing the dielectric layer between the HIS and the ground plane.
Gaurangi Gupta, A. R. Harish
openaire   +1 more source

Broadband circularly polarized cavity-backed antenna

TENCON 2010 - 2010 IEEE Region 10 Conference, 2010
The design and experimental investigation of a circularly polarized antenna with circular slot for broadband characteristics is proposed. The horizontal and vertical probes of the L-shaped probe, which is a key element to generate circular polarization, are separated in the structure, contrary to the concept of having joined probes.
R Joseph, S Nakao, T Fukusako
openaire   +1 more source

Design of an unidirectional UWB cavity backed antenna

2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO), 2017
This paper presents a low profile unidirectional UWB cavity backed antenna analyzed using The Theory of Characteristics Modes (TCM). The main goal of this work is to design a low profile UWB antenna with a very stable and unidirectional radiation pattern.
Carlos Ramiro Penafiel-Ojeda, Marta Cabedo-Fabres, Eva Antonino-Daviu, Miguel Ferrando-Bataller   +3 more
openaire   +1 more source

Multilayer Effects on Cavity-Backed Slot Antennas

IEEE Transactions on Antennas and Propagation, 2004
A hybrid technique of the finite-element method and the method of moments (FEM/ MoM) is used to analyze the effects of multilayered superstrates on cavity-backed slot (CBS) antennas. The spectral-domain approach is used to compute the MoM admittance matrix.
M.N. Vouvakis, C.A. Balanis, C.R. Birtcher, A.C. Polycarpou   +3 more
openaire   +1 more source

Radiation by cavity-backed antennas on an elliptic cylinder

IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229), 2002
We have demonstrated that the exterior and interior portions of a hybrid finite element-boundary integral computer program for characterizing the radiation of conformal antennas flush-mounted on an elliptic cylinder have been validated. An approximate asymptotic solution based on the uniform theory of diffraction (UTD) for surface fields due to a ...
null Chi-Wei Wu, L.C. Kempel, E.J. Rothwell   +2 more
openaire   +1 more source

Cavity backed two slot antennas

1976 Antennas and Propagation Society International Symposium, 2005
S. Tokumaru, H. Takahashi
openaire   +1 more source