HS
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pcb harmonics
I tuned very nicely a 2.4GHz amplifier to get 19dBm output and I inserted a very nice BPF to kill the harmonics (34dB on 4.8GHz and 40dB on 7.3Ghz).
Everything was nice till the point I added a PCB shield (required by FCC).
Then all the previous killed harmonics went back to life (like my Band Pass Filter was not any more in the circuit.)
Please advise. How can I correct this "unpleasant side effect" of the PCB shield?
Any info or reference to an article will be greatly appreciated.
Thank you in advance !
HS
I tuned very nicely a 2.4GHz amplifier to get 19dBm output and I inserted a very nice BPF to kill the harmonics (34dB on 4.8GHz and 40dB on 7.3Ghz).
Everything was nice till the point I added a PCB shield (required by FCC).
Then all the previous killed harmonics went back to life (like my Band Pass Filter was not any more in the circuit.)
Please advise. How can I correct this "unpleasant side effect" of the PCB shield?
Any info or reference to an article will be greatly appreciated.
Thank you in advance !
HS