Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: Broadband agile filter
Posted: Thu Nov 02, 2006 4:46 am
Joined: Thu Nov 02, 2006 4:40 am
I need to find a broaband agile filter. (2 to 18 GHz, BW = 200 MHZ)
A yig filter is not a solution because the BW stills not the same on each frequency.
Posted: Thu Nov 02, 2006 7:52 am
Joined: Fri Feb 17, 2006 12:07 pm
Location: London UK
It sounds like a job for down-convert>filter>up-convert with a tracking local oscillator.
It would comprise a 3 to 19GHz YIG oscillator, down-conversion mixer, 200MHz Bandpass filter and low-gain IF amp at 1GHz, and an up-conversion mixer, then a final amplifier to make up losses.
The bricks are available, but I am not sure if any company markets the full 9 yards as an item.