21.4mhz
时间：04-11
整理：3721RD
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The filter is to be used in a RX module as an IF .
It's maybe hard to design such band filter with LC under the technical index:
Center frequency:21.4MHz, Passband=100KHz, Rejection at 21.4MHz±150KHz>44dB
I.L.≤5dB.
I try to find some crystal filters, but I cannot find a one with the length<22mm.
I've also simulated some LC's ,but it need too many orders to get good performance and to realize.
So can anyone give some advice on how to realize it, thanks a lot!
It's maybe hard to design such band filter with LC under the technical index:
Center frequency:21.4MHz, Passband=100KHz, Rejection at 21.4MHz±150KHz>44dB
I.L.≤5dB.
I try to find some crystal filters, but I cannot find a one with the length<22mm.
I've also simulated some LC's ,but it need too many orders to get good performance and to realize.
So can anyone give some advice on how to realize it, thanks a lot!