Hi All,
Currently, I have designied a simple 2-way power divider based on Gap Waveguide technology (simply, it is quite similar to the conventional waveguide but without sidewalls) operates at 30 GHz (millimetre-wave band). The power divider is designed depending on coupling between resonators. Although changing the topology many times, the isolation between output ports a bad.
Please, in such power dividers what is the key of controlling the isolation.. And what do you suggest to increase the isolation between output ports?
Regards,
Bahaa
Dear Mr Aljuboori,
You have not mentioned the operating frequency, one solution can be using microwave absorbers. You can also simulate different waveguide modes to empirically determine the mode that gives you best isolation. With the limited information you have shared I am afraid that is all I can suggest now.
Thanks Mr. Majid, you are right.. The operating frequency is 30 GHz (millimetre-wave band). Do you think that absorber is still applicable for such high frequencies?
I have checked different waveguide modes.. the best one is the dominant mode. By the way, I have noticed that the isolation value is same for all modes.
Then I suggest try absorbers, if your university has an anechoic chamber for antenna or EMC testing you will should find some absorbers there. These are replaced in routine and usually available, cut them to your required size and measure the results after placing them at places likely to be causing coupling. If it works you may order specific ones or for academic requirements this should suffice.
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