EEVblog Electronics Community Forum

Electronics => RF, Microwave, Ham Radio => Topic started by: Cacao on September 12, 2017, 02:58:23 pm

Title: spacing for coupled line coupler
Post by: Cacao on September 12, 2017, 02:58:23 pm

does someone here know how can I calculate the spcing of the two transmission line on a coupled line coupler? Thanks in advance.

Title: Re: spacing for coupled line coupler
Post by: rf+tech on September 12, 2017, 04:13:08 pm

Hello Cacao,

Take a look at this Coupled Microstrip Calculator on Sourceforge.net:

http://wcalc.sourceforge.net/cgi-bin/coupled_microstrip.cgi (http://wcalc.sourceforge.net/cgi-bin/coupled_microstrip.cgi)

The CGI-Wcalc home page has a nice collection of handy RF calculators, including coupled stripline and coplanar waveguide:

http://wcalc.sourceforge.net/cgi-wcalc.html (http://wcalc.sourceforge.net/cgi-wcalc.html)

RF+ Tech

Title: Re: spacing for coupled line coupler
Post by: bjcuizon on September 16, 2017, 09:15:16 pm

Here's an article about coupled line couplers and some calculators that might help you too. ;)
https://www.microwaves101.com/microwave-encyclopedia/coupled-line-couplers (https://www.microwaves101.com/microwave-encyclopedia/coupled-line-couplers)
http://www.hughescircuits.com/index.php/en/support/impedance-calculator (http://www.hughescircuits.com/index.php/en/support/impedance-calculator)
http://www.finetune.co.jp/~lyuka/technote/ustrip/ (http://www.finetune.co.jp/~lyuka/technote/ustrip/)
https://www.eeweb.com/toolbox/edge-coupled-microstrip-impedance (https://www.eeweb.com/toolbox/edge-coupled-microstrip-impedance)
Have fun with microstrip! ..and hope that helps.