The Utilization of Backgrounds as Radiating Elements to Construct Multibeam Radial Line Slot Array (RLSA) Antennas

Dual Circularly Polarized Concentric Array Radial Line Slot Antenna fed by Rotating modes from Front and Back Sides for Satellite Application

Radial line slot antennas (RLSAs) are well known as high-efficiency planar antennas in high-gain region for the circular polarization [1]. Figure 1 shows the structure of a general RLSA. A radial waveguide is composed of two parallel circular metal plates. An electromagnetic power is fed from the center and excites a slot array on the top plate. To obtain a pencil beam, the radiating elements a...

A Reconfigurable Radial Line Slot Array Antenna for WiMAX Application

Radial Line Slot Antennas Fed by a Rectangular Waveguide through a Crossed Slot

Sensitivity of Planar Slot Array Antennas to Manufacturing Tolerances

Waveguide slot arrays are an attractive but expensive choice in a wide range of microwave and millimeter-wave applications when high gain and efficiency are critical. Resonant longitudinal slot arrays offer very high aperture efficiency, low side-lobe levels, and low cross polarization, however, they usually suffer from narrow bandwidth and high cost due to high precision required in manufactur...

Two design methods for Radial Line Slot Antennas with arbitrary or beam pattern

Two design procedures for Radial Line Slot Antennas (RLSAs) with circular polarization and either maximum gain or an arbitrary shaped pattern are proposed. Firstly, a method to design a RLSA with any desired pattern is presented. It is based on an optimization algorithm and some measures to ensure its fast convergence and stability need to be taken. Secondly, a fast technique to calculate the l...