harshitb
Newbie
Hello everyone.
I am designing a coupled line hybrid coupler as a part of of term evaluation at my university. So from my conceptual understanding here coupled line hybrid coupler implies a coupled line coupler with coupling coefficient -3 dB . Parameters given were substrate thickness 0.8 mm , amd frequency 3 GHz . I used the website emtalk for microstrip line calculations ( required to use this only ) and used the w and s from that in my design. But the graph coming out is incorrect, but when I was trying out L of different orders ( randomly) it gave me correct graph at 25cm but that is not suitable for fabricating. I need help in calculating S and L . Please help me out here.
I am designing a coupled line hybrid coupler as a part of of term evaluation at my university. So from my conceptual understanding here coupled line hybrid coupler implies a coupled line coupler with coupling coefficient -3 dB . Parameters given were substrate thickness 0.8 mm , amd frequency 3 GHz . I used the website emtalk for microstrip line calculations ( required to use this only ) and used the w and s from that in my design. But the graph coming out is incorrect, but when I was trying out L of different orders ( randomly) it gave me correct graph at 25cm but that is not suitable for fabricating. I need help in calculating S and L . Please help me out here.