does someone know something about tunable notch filter

hello, everyone,
can someone tell me where i can get a tunable notch filter product with wide dynamic tuner range, small size and dc controll tune, etc.? thanks for all about this.

rgs,
xiyx

Which frequency? Because every frequency range has its own topology...Please be specific

look at K&L microwave

Please contact me, I am doing some work on wide-band adjustable notch filters. We can share the information. Thanks.

how about 3~5G? and can you give me some suggestion? thx.

rgs,
xiyx

Added after 5 minutes:

thx. but can you recomand some compact configuration?

rgs,
xiyx

hi,dorr, please give me your contact info.mine is lycloud1978@163.com
wish to discuss with you.