Custom Search

More than 10,000 searchable pages indexed.

Greetings: There is so much good stuff on RF Cafe that there is no way to list or link to all of it here. Please use the Search box or the Site Map to find what you want - there is a good chance I have it. Thanks!

•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<
Job Board
About RF Cafe™
Copyright 1999-2015

PIN Diode question - 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: PIN Diode question Posted: Fri Aug 15, 2008 9:50 pm


Joined: Fri Jan 26, 2007 2:40 am
Posts: 14
What is the typical lowest usable frequency for a PIN diode? I'm not all that familiar with them but I've done some calculations and it seems to me you could use them to isolate frequencies below 1 MHz. I need to design a bank of HPFs for an HF radio and I don't want to just use relays due to current requirements and size. I know the PIN needs some but overall I will probably use lower DC.

My main concern is the isolation at the lower frequencies.




Post subject: Posted: Sat Aug 16, 2008 3:37 am

Site Admin

Joined: Mon Jun 27, 2005 2:02 pm
Posts: 373
Location: Germany
Hello jom,

You can work with PIN diodes up to low frequencies (10KHz and lower), at the 1-10MHz region, Rs is not constant but increases.

In the KHz region, the diode will act as normal PN diode.

So I would say there is no problem to use it for your application.

Posted  11/12/2012

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