Title :
On the control of radiation directivity of elementary source coupled in electromagnetic crystals
Author :
Jandieri, Vakhtang
Author_Institution :
Dept. of Electr. & Comput. Eng., Kumamoto Univ., Kurokami
Abstract :
A directivity of radiation from a line source coupled to 2D electromagnetic crystals is investigated using a Fabry-Perot resonator model for the coupled radiating structure. It is shown that the directivity is characterized by the transmission windows of the electromagnetic crystals in the frequency and angular spectral domains and the transverse resonance condition in the space surrounded by the electromagnetic crystals. A directivity diagram that relates the transmission and reflection spectra of electromagnetic crystals and the size of the resonator to the radiation patterns attainable by a line source is presented. Several numerical examples validate the usefulness of the diagram for designing unique electromagnetic crystal antennas.
Keywords :
Fabry-Perot resonators; antenna radiation patterns; directive antennas; microwave photonics; photonic crystals; reflectivity; 2D electromagnetic crystals; Fabry-Perot resonator model; angular spectral domains; coupled radiation structure; electromagnetic crystal antennas; elementary source; frequency domains; line source; radiation directivity control; radiation patterns; reflection spectra; transmission spectra; transmission windows; transverse resonance condition; Antenna radiation patterns; Dielectrics; Electromagnetic coupling; Electromagnetic modeling; Electromagnetic radiation; Electromagnetic waveguides; Frequency; Phased arrays; Photonic crystals; Slabs;
Conference_Titel :
Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 2008. DIPED 2008. 13th International Seminar/Workshop on
Conference_Location :
Tbilisi
Print_ISBN :
978-966-02-4649-2
DOI :
10.1109/DIPED.2008.4671819
