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Tunable Bandpass filter 500~700MHz - RF Cafe Forums

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Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Tunable Bandpass filter 500~700MHz
Posted: Mon Dec 21, 2009 2:57 pm 
 
Captain

Joined: Mon May 04, 2009 6:47 pm
Posts: 22
I'm looking for tunable RF bandpass filters for a 500MHz~700MHz radio. Besides K&L, is there any other vendors making this? Thanks.


 
   
 
 Post subject: Re: Tunable Bandpass filter 500~700MHz
Posted: Wed Dec 23, 2009 6:25 pm 
 
Captain

Joined: Sun Oct 04, 2009 5:17 pm
Posts: 6
I think you can have a look at the pole-zero and ewings products.


 
   
 
 Post subject: Re: Tunable Bandpass filter 500~700MHz
Posted: Tue Jan 05, 2010 1:12 pm 
 
Captain

Joined: Mon May 04, 2009 6:47 pm
Posts: 22
Looks like Pole Zero 's products are for frequency hopping radio. Not sure about its price I believe it's quite high and not necessarily for my project.

Can you give details of Ewings? Googled unsucessful.


 
   
 
 Post subject: Re: Tunable Bandpass filter 500~700MHz
Posted: Thu Jan 14, 2010 3:05 am 
 
Lieutenant

Joined: Thu Jan 14, 2010 2:57 am
Posts: 4
you can design yourself a good filter using mems or using pin diodes.

Why 2 waste money, just do sm rnd

even ieee papers already have mentioned some filters but i remember their insertion loss wass abt 2 db.


 
   
 
 Post subject: Re: Tunable Bandpass filter 500~700MHz
Posted: Sat Jan 16, 2010 2:24 pm 
 
Colonel

Joined: Tue Apr 11, 2006 8:13 pm
Posts: 34
You can check Lorch microwave or Lark Engineering as well

karthik


 
   
 
 Post subject: Re: Tunable Bandpass filter 500~700MHz
Posted: Fri Jan 22, 2010 11:28 pm 
 
General
 

Joined: Wed Feb 22, 2006 3:51 pm
Posts: 104
What sort of specifications do you need?

Passband Bandwidth
Stopband Bandwidth
Passband ripple
Stopband attenuation
Tuning speed
Noise level
Power level

would all be important.

Good Luck!


 
   
 
 Post subject: Re: Tunable Bandpass filter 500~700MHz
Posted: Tue Jul 13, 2010 3:15 pm 
 
Lieutenant

Joined: Thu Jan 14, 2010 2:57 am
Posts: 4
there are a lot of good papers for tunable filters. the range and bandwidth you mentioned is esily covered by a lot of papers. try searching at least ieee.





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