Title : 
Design data for interdigital directional couplers
         
        
            Author : 
Hewitt, S.J. ; Pengelly, R.S.
         
        
            Author_Institution : 
Plessey Avionics & Communication, Applied Research Laboratories, Romsey, UK
         
        
        
        
        
        
        
            Abstract : 
The letter presents graphical information relating the performance of interdigital microstrip directional couplers to the geometrical parameters of the circuit. The theoretical background is summarised, and a comparison is made with reported experimental results.
         
        
            Keywords : 
directional couplers; strip line components; geometrical parameters; interdigital directional couplers; microstrip directional couplers;
         
        
        
            Journal_Title : 
Electronics Letters
         
        
        
        
        
            DOI : 
10.1049/el:19760068