Title :
Frequency-scanned reflection gratings consisting of ring patches
Author :
Johansson, F. Stefan
Author_Institution :
Div. of Network Theory, Chalmers Univ. of Technol., Gothenberg, Sweden
fDate :
8/1/1991 12:00:00 AM
Abstract :
A periodic array of thin conducting ring patches etched on a dielectric substrate and placed over a ground-plane is investigated for the use as a frequency-scanned reflection grating (blazed grating). The theoretical analysis used is based on Floquet´s theorem and the method of moments. Numerical examples are presented showing that frequency-scanned gratings can be designed to operate for circular polarisation with high blazing efficiency, i.e. with the property of efficiently scattering the power of an incident electromagnetic wave into the first order diffracted wave
Keywords :
diffraction gratings; electromagnetic wave diffraction; electromagnetic wave scattering; reflector antennas; scanning antennas; Floquet´s theorem; antenna theory; blazed grating; circular polarisation; dielectric substrate; electromagnetic scattering; first order diffracted wave; frequency-scanned reflection grating; ground-plane; high blazing efficiency; incident electromagnetic wave; method of moments; periodic array; reflector antenna; thin conducting ring patches;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
