do we have any bandpass filter module available in the market ....or we only have to design them according to spectfication.
thanks
Regards

 

hello,

What should be the frequencie and bandwidth of your filter.

On this page technical reference can be found.
http://ac6v.com/techref.htm

Greetings,
Bertus

 

the frequency has to be 433MHz and the bandwidth around 1Mhz

 

Hello,

1 Mhz bandwidth will be hard to get or make.
I fousd a design for a 6 Mhz bandwith filter.
http://members.cox.net/nx7u/mobile/4x3x5.htm
Some more pictures can be found on this german site.
http://www.schray.de/435filter/index.htm

Greetings,
Bertus

 

the frequency has to be 433MHz and the bandwidth around 1Mhz

You need to give more specifics than that.

What is the power level going through the filter?
How much attenuation is allowable?
How much ripple?
What is your stopband, and how many dB down do you need?

In general, your passband is rather narrow being about 0.23% of the frequency. This is going to be a rather complex (and expensive) filter if it's passive.

 

If this was for a receiver the general technique is to covert it to a lower frequency, as in down converting via heterodyning. The filter is much easier to make then.