On Fri, Jul 9, 2010 at 11:30 AM, Elvis Dowson <[email protected]> wrote:
> Hi,
> Are there any components that can be used to implement a programmable
> band-pass filter between the antenna and the LNA, of the RF front-end for an
> SDR application.
>
> I was wondering if there are an discrete components available that can be
> programmed by I2C or SPI, that can be controlled by an FPGA, to tune the
> band-pass filter in between the antenna and the LNA.
You could try something like a switched filter bank as a preselector:
http://www.spectrummicrowave.com/sfb.asp
That was something a quick google search found. Unfortunately, your
band-pass requirements are lacking. What types of channel bandwidths
do you want? How many channels? How much rejection are you looking
for?
I am guessing said filters are pretty expensive.
> Best regards,
>
> Elvis
Good luck.
Brian
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