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help! about the rf choke!!

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hakunamatata

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rf choke for 100mhz

i design a rf circuit working at 100 mhz. there is a rfc in the circuit to choke the ac signal and it is about 40µh ,but i cannt find such a big inductance working at 100mhz. who can give me some advice? thanks a lot!!
 

For frequencies of 100MHz you should look for RF chokes in the range of 0.1-1µH, and I am pretty sure you will find planty to choose from ..
40µH RF choke looks better at 10MHz or less applications ..
Regards,
IanP
 

I think 1uh is ok.
 

the 1µh inductance is about 600Ω at 100mhz. maybe it is a littile small.
 

If you put 1uH in a 50 ohm or 75 ohm system, the insertion and return losses are negligible (except you are interested in the 0.1 dB loss range).
 

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