globalone
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Hello,
Please see the attached directional coupler circuit.
I am trying to build a directional coupler to isolate 20 dB from 30 dBm input power of 50 ohm system.
The input power is 30 dBm and I want to match 2.2 GHz , 2.3 GHz and 2.4 GHz frequency bands.
- What should be the thickness of the main line if i want to use FR4 or Rogers boards?.
- What should be the thickness of the second line too ?.
- How long should the second line be in mm ?
- What should be the distance (spacing) between the 2 lines ?.
- What is the insertion loss of main line if we want to isolate 20dB ?
Thank you so much for your kind help
Regards,
Ghassan