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This paper describes the procedure followed to design and optimize a large array of resonant shunt slots loaded with parasitic dipoles to achieve circular polarization. Specifically, it proposes a procedure to tune up the uniform array model design. Such method turns out to be fundamental when external mutual couplings among radiators exhibit strong levels. This is the case treated in this paper,...
The basic structure of a RLSA consists of a set of slots placed on the upper face of a simple parallel plate waveguide. Such guide is fed at its centre, typically by a coaxial probe. The suitable arrangement of slots provides the desired radiation pattern and polarization. However, while the circularly-polarized RLSA (CP-RLSA) has been successfully developed and it is commercially available, its equivalent...
This paper describes the procedure followed to design a large array of resonant shunt slots loaded with parasitic dipoles to achieve circular polarization. The array is covered with a multilayer radome. The modelling technique uses specialized Green's functions for both the multilayer region and the rectangular waveguide region and the method of moments. The design procedure is based on the so-called...
This paper proposes new topologies of linearly polarized radial-line slot-array antennas (LP-RLSA) which uses slot-dipole pairs as radiating elements. Firstly, the basic design of the antenna with cancelling slots is considered and its benefits and drawbacks are highlighted. The evolution of this configuration leads to more convenient arrangements of the radiating and cancelling elements. Finally,...
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