Title : 
On directivity optimization of the aperture antennas
         
        
        
            Author_Institution : 
Vice research fellow, Beijing, China
         
        
        
        
        
        
        
            Keywords : 
Antenna theory; Aperture antennas; Character generation; DH-HEMTs; Eigenvalues and eigenfunctions; Equations; Fellows; Functional analysis; Null space; Surface waves;
         
        
        
        
            Conference_Titel : 
Antennas and Propagation Society International Symposium, 1980
         
        
            Conference_Location : 
Quebec, Canada
         
        
        
            DOI : 
10.1109/APS.1980.1148346