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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 typing 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:


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Check this Website - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 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.

-- Amateur Radio

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Systems

-- Test & Measurement

 Post subject: Check this Website
Posted: Wed Jun 20, 2007 3:25 am 
User avatar

Joined: Wed Jun 20, 2007 3:01 am

Posts: 39

Dear All,

Check this website. It is free, as it is under testing. imodelit provides online tools for microwaves and optics components.

Please, send your comments on the website, applets, categories, shareware,... Feel free to send your feedback. Thanks in advance.

Best Regards,

imodelit Moderator

Kirt Blattenberger
 Post subject:
Posted: Wed Jun 20, 2007 10:50 am 
Site Admin
User avatar

Joined: Sun Aug 03, 2003 2:02 pm

Posts: 701

Location: Erie, PA

Greetings imodelit_moderator:

That is a very nice website you have there :smt023. The user interface for the Java applets is one of the best I have seen - the output graphs with moving cursor readouts are a good touch. I highly recommend anyone reading this post visit your site. Being an amateur astronomer, I really appreciate the telescope optics calculators.


I added your website to my "Engineering Calculators & Converter Applets" page, and also added a link to the RF Cafe homepage in the "Recent Additions" column.

Incidently, I registered as a user, but then when clicked on the "Applet subscription" link to subscriber, I got an error message.


- Kirt Blattenberger :smt024

RF Cafe Progenitor & Webmaster

 Post subject: Thanks from imodelit moderator
Posted: Thu Jun 21, 2007 3:43 am 
User avatar

Joined: Wed Jun 20, 2007 3:01 am

Posts: 39

Thanks Kirt for your feedback and bringing the www.imodelit.com forward into the rfcafe website.

After investing alot of time and efforts in it, I am glad to hear that the applets interface is great.

We will take care of the server error, thanks for telling us.

Best regards

imodelit moderator

 Post subject:
Posted: Mon Jul 21, 2008 11:48 pm 

Joined: Mon Jul 21, 2008 11:28 pm

Posts: 9

Location: MA, USA

I looks fairly good and useful for the persons who will be working in the respective fields. I think you can also extend it to include some more designs like filters etc ...

 Post subject:
Posted: Tue Jul 22, 2008 2:39 am 
User avatar

Joined: Wed Jun 20, 2007 3:01 am

Posts: 39

Dear dehati,

Thanks for your comment. The website already contains applets for:

filters (http://imodelit.com/ViewProducts.aspx?ISShareWare=0&CID=98)

Baluns and Transformers (http://imodelit.com/ViewProducts.aspx?ISShareWare=0&CID=96)

Dividers and Couplers (http://imodelit.com/ViewProducts.aspx?ISShareWare=0&CID=95)

In addition to the shareware library that contains other models, as for

Metamaterial devices (http://imodelit.com/Sharewarelist.aspx?CAT_ID=140&ISShareWare=1).

Modified Couplers (http://imodelit.com/Sharewarelist.aspx?CAT_ID=146&ISShareWare=1).

If you want a specific model to be made you can either send me or directly to the customer support customer.support@imodelit.com. Hoping to hear from you soon. Thanks in advance.

Best Regards,

imodelit Moderator

Posted  11/12/2012

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RF Cafe Visitor Comments on News, Articles, System, Design, Components, etc.

Please e-mail your comment to me (Kirt B.), and I will post it here for you - no computers involved!

1 - Your participation will be greatly appreciated. - Kirt B.

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