Design method, analysis and prototypes of radial line slot antennas

The authors propose a design procedure and an analysis method for radial line slot antennas. Several prototypes have been fabricated to validate these methods. The design procedure is very simple, and can be included in software. The analysis method is required to be very fast, in order to design this kind of antennas. It considers only one variable per slot and calculates the coupling between the elements of the antenna. It has been validated with measurements and method of moment simulations. The first prototypes are for TV-DBS reception at 12.1 GHz. They have a narrow broadside beam. The last prototype is a monopulse antenna. The monopulse capability can be obtained by comparing two simultaneous beams. Two simultaneous beams are obtained, a sum one and a difference one.