Shively Labs FM Antennas and Accessories
Home About Shively FM Antennas FM Filters & Combiners IBOC HDRadio™ Coax Components Other Products & Services Technical Information Solving Customer Needs
We'll see you:
... at the NAB Radio Show
September 21 - 23 in Nashville!
Product News

We'll be showing our newest antennas:

Model 6822
Model 6020 LT
Model 6812C

... and our new 12-inch, 10 kW filter,
Model 2712-3A!

Also, check out our new
[award-winning; see below]
Versa2une field-tunable FM antenna!

... and our new Model 6025 log periodic antenna!

4/11/13 at NAB:
New Cool Stuff Award for our
Versa2une field-tunable FM antenna!

SBA logo

Shively Labs is Maine's Small [Business] 2012 Exporter of the Year!
More information ...

Our parent company, Howell Labs, was just named SBA's 2013 Region I Subcontractor!
More information ...

Shively Labs has won a techINK 2010 Innovation Award for our Graphical Power Meter system!
Innovation award logo
NAB logo
Our Model 6020 antenna brings home the Radio World Coolstuff Award!

new"Shively trials new extended FM antenna in Brazil"

new"Shively’s new high power broadband on the air in South Dakota"

Paul Wescott obituary:"A damn good sense of direction, and a steady hand on the wheel, for over 30 years"

New technical bulletin: "Tips and Tricks to Make 222-G Work for You"

November-December 2011 Radio Guide article: "A Really Xtreme Build"

September-October 2011 Radio Guide article: "Shively Labs - Where FM Antennas Are Not Just a Sideline"

May-June 2008 Radio Guide article:
"Shively Labs Meets the Very Windy Mountain"

September 2007
Radio Guide articles:
"Shively Labs: Antennas That Work!" [279 kB]

"Shively 6014 Dual Hybrid Antenna Solves a Dilemma" [232 kB]

Archived articles

Handy Calculators for RF Engineers

Calculators are Microsoft Excel spreadsheets.
These materials are for your on-line use. Please note that some are copyrighted. Contact Shively for copying and distribution information.
IBOC Injection Analysis
For high-level (non-coherent) and mid-level (coherent) IBOC injection.
  • The calculator for high-level (non-coherent) IBOC injection is used to analyze the combining of a single digital transmitter and a single analog transmitter for broadcast over a common antenna. By adjusting the “Analog Output” (amount of analog power being sent up the transmission line) and “Coupler” values, it is possible to get a complete overview of the entire power budget of the transmission system (with the exception of line losses). This makes it possible to determine the most cost effective coupling solution.
  • The calculator of mid-level (coherent) IBOC injection is used to analyze the combining of an existing analog transmitter and a new, combined analog/digital transmitter for broadcast over a common antenna. “Total Analog Output” is the total analog power of the combined transmitters that is being sent up the transmission line.

Dissipated Power and Heat Generated in a Filter
If you know your transmitter power and your insertion loss in dB ...

Last updated: 11/07/2006
Webmaster: Al Friend
© copyright 2006 Howell Laboratories, Inc.