Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol RF Superstore San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
Exodus Advanced Communications Best in Class RF Amplifier SSPAs

Tunable Bandpass filter 500~700MHz - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2010 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

NOTICE: The original RF Cafe Forum is available again for reading, and the new RF Cafe Blog is an active board.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

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

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 

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 

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 

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 

Joined: Tue Apr 11, 2006 8:13 pm

Posts: 34

You can check Lorch microwave or Lark Engineering as well


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

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 

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

Innovative Power Products Couplers
Windfreak Technologies Frequency Synthesizers - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free


About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: