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Anatech Electronics (RF Filters) - RF Cafe
Berkeley Nucleonics Academy RF Boot Camp - RF Cafe

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:


Innovative Power Products Couplers

Please Sponsor RF Cafe
*** New Banner Advertising Scheme in Effect ***

RF Cafe typically receives 10,000-15,000 website visitors each weekday and about half that on weekends (see chart). RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more then 16,000 unique pages in the Google search index, RF Cafe returns in favorable positions on many types of key searches, both for text and images. New content is added on a daily basis. 

New Banner Advertising Plan for Fall 2021 - RF Cafe RF Cafe Banner Advertising scheme.

NOTE: I reserve the option to refuse ads which I do not feel are appropriate for the RF Cafe mission.

RF Cafe on a Samsung S4 Smartphone

RF Cafe on a Samsung S4 smartphone. At the time of this writing, RF Cafe scores an "Awesome! This page is mobile-friendly" on Google's Mobile-Friendly Test.


Website Traffic Trend January - April 2021

RFCafe.com Web Statistics January - April 2021

Note: My web host is having problems with the statistics reports right now, so I haven't been able to do an update since April.

All Banners will be randomly displayed in any of the six (6) page border positions (see screen capture), so every company's Banner will have an equal chance of appearing.

A random number generator determines which company's Banner Ad will go in a particular position, and no company's Banner Ad will be displayed in more than one position for a given page view*. I wrote the PHP code myself and it is very simple and foolproof.

Banner Advertising Features & Pricing

A pair of industry-standard Banner graphics - one 160x600-pixel graphic for the vertical format and one 728x90-pixel graphic for the horizontal format - are needed for page border impressions. Also, a 330x400-pixel graphic for the Highlighted Ad impressions on Vendor pages is needed. You provide the Banner and Highlighted Ad graphics.

  • Contract Length = 3 months
  • Price: A flat price of $300 per month is charged, with a standard 3-month term.
    • Additional Banner Pairs* (up to a maximum of 3) may be purchased at discount rates to increase the odds that your company's Banner Ad will be displayed:
      • 1 Banner Pair = $300/month = $900/3-months
      • 2 Banner Pairs = $270/month (-10%)
      • 3 Banner Pairs = $255/month (-15%)
      • 4 Banner Pairs = $240/month (-20%)
    • * Each Banner Pair adds another set of Banner Ads (160x600-px and 728x90-px) into the random display engine, thereby doubling your likelihood of being displayed. Unique Banner Ad designs and hyperlink URLs can be provided with each additional Banner Pair.
    • If your company is a parent to other related companies, the above additional Banner Pairs can be applied for each company, up to a total of three (3).
  • Banner Ad Specifications:

    728x90 - Width = 728 px, Height = 90 px

    160x600 - Width = 160 px, Height = 600 px

    File Format = JPG, GIF, or PNG (static, no animation)

    File Size = 45 kBytes (maximum)

    Hyperlink = Points to your company website

    A separate URL may be provided for each of the 2 Banners.
    Content = Text & graphics
  • Highlighted Vendor Page Ad Specifications:

    Width = 330 px, Height = 400 px

    File Format = JPG, GIF, or PNG (static, no animation)

    File Size = 45 kBytes (maximum)

    Hyperlink = Points to your company website

    Content = Text & graphics

    Vendor Page Placement = Up to 5 pages related to your

     products and/or services. Please review the Vendor Page list to determine where you would like to be (must pertain to your business). Additional pages are $5/page/month.
  • A unique Highlighted Ad graphic and hyperlink URL may be provided for each Vendor Page on which one is displayed.

Important Notes:

  • Pixel dimensions and maximum file sizes listed are firm. If you have trouble meeting the file size, I will be glad to help - there has never been an ad I couldn't fit into 45 kBytes.
  • I do not collect page traffic or link click statistics for advertisements. Your website server statistical analysis is a much better reporter of inbound links from RF Cafe than I or anyone else can provide.
  • To the best of my knowledge the page layouts shown are representative of all pages on RF Cafe.
  • I make page layout changes from time to enhance performance.
  • The rel="sponsored" tag is inserted into all coded hyperlinks.
RF Cascade Workbook 2018 - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe
TotalTemp Technologies (Thermal Platforms) - RF Cafe

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

These Are Available for Free