Title :
Broadband microstrip directional coupler
Author :
Nair, Naveen V. ; Mallick, A.K.
Author_Institution :
Indian Institute of Technology, Department of Electronics & Electrical Communication Engineering, Kharagpur, India
Abstract :
A nonuniform microstrip directional coupler with sinusoidally modulated coupling function is presented. The ripple and the amplitude response are controlled by the index of modulation m and the periodicity P of the function. For demonstration, a 20 dB ± 6% coupler is constructed on two different substrates and the experiment shows much flatter coupling response than the uniform or exponential line directional couplers.
Keywords :
directional couplers; strip line components; amplitude response; coupling response; function periodicity; microstrip directional coupler; microwave devices; modulation index; ripple; sinusoidally modulated coupling function; strip line components;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830552
