Radial Microstrip Slotline Feed Network for Circular ... RADIAL MICROSTRIP SLOTLINE FEED NETWORK FOR CIRCULAR MOBILE COMMUNICATIONS ARRAY Rainee N. Simons% Eron S. Kelly, Richard Q. Lee and Susan R. Taub NASA Lewis Research Center, Mail Stop 54-5 21000 Brookpark Road, Cleveland, Ohio 44135 INTRODUCTION In mobile and satellite communications there is a need for low cost and low profile antennas which ... The Effects of Parasitic Superstrate Elliptical Shaped ... M.F. Jamlos, O.A. Aziz, T.A. Rahman, M.R. Kamarudin support layers on the performance of an elliptical shaped and P. Saad, “Reconfigurable Radial Line Slot Array microstrip patch antenna with random and unsymmetrical slots (RLSA) Antenna for Beam Shape And Broad-Side are presented in this paper. A Radial Line Slot Antenna for an Elliptical Beam - IEEE ...
US2769148A - Electrical conductors - Google Patents
Microwave Antenna Systems | Radiation pattern envelopes… Radiation pattern A diagram relating power flux density at a constant distance from an antenna to direction relative to the antenna main beam axis.This allows the outdoor unit of the radio to be mounted directly the antenna, removing the need for an additional twistflex or elliptical waveguide... High gain waveguide slot array antenna for 60 The normalized radiation conductance for a single slot in broad wall of a rectangular waveguide, as can be seen in the approximated equation 2.4.4This would work sufficiently good for an small array with less than ten slots per row but not for a large planar array where the waveguides needs to be... Broad band antenna arrays and noise The antennas are spaced at the optimal spacing for all antenna elements, over a broad bandwidth.4.5 Sketch of a radial microstrip-to-slotline transition. The solid lines represent a slot on the front side of the substrate, and the(The overlap can be negative for a very high-impedance line) . ... . .
patterns are obtained with different excitations of the radial line slot antenna (RLSA). Basically, if the slots are placed in concentric rings, when the RLSA is excited in the centre, a conical or difference beam is generated. However, if a rotating mode is excited, a pencil or sum beam is generated. This
A Beam Steering Radial Line Slot Array (RLSA) Antenna with ... A beam steering radial line slot array (RLSA) antenna with reconfigurable operating frequency is proposed in t | Mohd Faizal Jamlos, Omar Abdul Aziz, Tharek Abdul | Journal of Electromagnetic Waves and Applications | A Radial Line Slot Antenna for an Elliptical Beam - IEEE ... A radial line slot antenna (RLSA) with a quasi-elliptical aperture to create an elliptical beam is discussed in this paper. A simple feeding structure consisting of a coaxial feeder and two parasitic pins is designed to produce the feed pattern required for uniform illumination over the aperture.
RADIAL LINE SLOT ARRAY (RLSA) ANTENNA DESIGN FOR POINT TO ...
Multilayered Cavity Material Radial Line Slot Array ... Khan, 2011)) are being considered. At millimeter wave band, microstrip antenna design becomes challenging and to date little is known about antenna design at millimeter wave for cellular or mobile communication (Chen & Zhang, 2013). Radial Line Slot Array (RLSA) antenna with its starling characteristic of high gain, low cost, Design of mm-Wave RLSAs with Lossy Waveguides by Slot ... This paper discusses how to design a Radial Line Slot Antenna (RLSA) whose waveguide is filled with high loss dielectric materials. We introduce a new design for the aperture slot coupling synthesis to restrain the dielectric losses and improve the antenna gain. Based on a newly defined slot coupling, a number of RLSAs with different sizes and loss factors are analyzed and their performances ... Radial line slot array antenna - NEC Space Technologies, Ltd.
Design of Ring-Focus Elliptical Beam Reflector Antenna
Conclusions • A SOTM (satellite on the move) DBS receiver has been designed and implemented successfully based on Radial Line Slot Array (RLSA) antenna which operates at Ku band. • This RLSA antenna has eight concentric array slot pairs to achieve conical beam, better gain and wider frequency bandwith compared to Makoto Ando model. Sidewall Waveguide Slot Antenna for High Power Sidewall Waveguide Slot Antenna for High Power Carl E. Baum University of New Mexico Department of Electrical and Computer Engineering Albuquerque New Mexico 87131 Abstract This paper discusses a concept for high-power microwave antennas based on an array of slots in the sidewall where the electric fields are lower. Antennas | Radiall Radiall offers a complete range of antennas dedicated for military and industrial applications. It includes radio tactical communications, vehicles, positioning, LMR/PMR and telemetry applications. Additionally, Radiall offers custom designed antennas and high end support to its customers for any special requirements.
The authors present concentrically arrayed radial line slot array antenna for operation at 106 GHz. For compact design, they propose a vertical waveguide feeding with a cross-slot structure at the waveguide to cavity transition. Aperture design and optimisation are carried out using particle swarm optimisation with the goal to minimise the cross-polarised radiation. US9214740B2 - Radial line slot array antenna - Google Patents The radial line slot array antenna according to claim 1, wherein the first portion is a portion along a first radial direction, and the second portion is a portion along a second radial direction that is different from the first radial direction.