Shively Labs FM Antennas and Accessories
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Shively News
David Allen takes the helm as President of Howell Laboratories and Shively Labs.
Shively Labs forms new partnerships with EMC of Brazil and BWPSI of the Philippines.
Partnering with Ideal Antenas of Brazil.
Our freshly redesigned Model 2914 bandpass filter can now handle up to 1 kW input power!
Awards
Shively Labs has won a techINK 2010 Innovation Award for our Graphical Power Meter system!
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Our Model 6020 antenna brings home the Radio World Coolstuff Award!
Articles

newSeptember-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

IBOC Options

(20 dB injection)


Option A: Single Station, Combined Digital/Analog Transmitter, Common Antenna



Option B: Single Station, Separate Analog and Digital Transmitters, Common Antenna, High-Level Combining



Option C: Single Station, Separate Analog and Digital Transmitters, Interleaved Antenna

Example: 6 kW ERP analog signal using 3-bay analog antenna and 2-bay digital antenna (no transmission line losses included):

Analog antenna input = 6,000 W (analog ERP) / 1.55 (analog gain) = 3,871 W
Analog return power = 3,871 W x 20 dB = 39 W
Digital antenna input = 60 W (digital ERP) / 0.99 (digital gain) = 61 W
Minimum isolator size required = 61 W + 39 W = 100 W.


Option D: Single Station, Separate Analog and Digital Transmitters, Separate Analog and Digital Antennas



Option E: Multiple Stations; Branched Combiner; Common Antenna



Option F: Multiple Stations; Branched Combiner; Separate Digital and Analog Antennas



Option G: Multiple Stations; Balanced Combiner; Combined Digital and Analog Input for Each Station



Option H: Multiple Stations; Balanced Combiner; Separate Digital and Analog Input per Station; Separate Digital and Analog Feeds to the Antenna; Single Antenna Input



Option I: Multiple Stations; Balanced Combiner; Separate Digital and Analog Input per Station; Separate Digital and Analog Feeds to the Antenna; Dual Antenna Inputs



Option J: Multiple Stations; Balanced Combiner; Split Transmission Lines to Feed Combined Digital and Analog Signals over Separate Transmission Lines



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Last updated: 01/06/2010
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