•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

Tunable Bandpass filter 500~700MHz - RF Cafe Forums

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 Facebook page, please do.

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.





Posted  11/12/2012
Custom Search
More than 10,000 searchable pages indexed.

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website