News & Events
Which Antenna Duplexer is right for you?
Which Antenna Duplexer is right for you? There are several factors involved in choosing the right duplexer for your application. Most consider only TX power and frequency offset when deciding whether a duplexer fits their application. While these factors are...
Understanding Antenna Aperture and BDA Systems
Understanding Antenna Aperture and BDA Systems Utilizing a directional antenna for a BDA donor antenna isn't just about the gain it provides, but also how the antenna narrows the aperture of the antenna. Using a directional donor antenna focuses the energy to-and from...
Cavity Filter-Ferrite vs Hybrid-Ferrite Combining
Cavity Filter-Ferrite vs Hybrid-Ferrite Combining: What's the Difference? Transmitter (TX) Combiners are designed to allow a number of transmitters to share a common antenna reducing cost as well as tower wind and weight loading. A TX Combiner needs to accomplish...
Alan Leffler Retirement Announcement
After a long, fruitful relationship with EMR corp, Alan Leffler has retired as of March 1st 2022. Alan began his career with EMR in 2004 first as a Salesman, then as Account Executive, National Sales Manager and finally as an RF Systems Consultant. His hard work,...
Antenna Duplexers Manual
Antenna duplexers provide the means for simultaneous operation of a mobile relay or repeater station having separate TX and RX frequencies when using a common antenna.
Download PDFCavity Resonators Manual
Cavity resonators are a key component used in land mobile, radio broadcast and related applications as elements of band pass filters, pass notch filters, antenna duplexers, receiving preselectors, transmitting filters, transmitter combiners and similar devices.
Download PDFHybrid-Filter TX Combiner Manual
Hybrid couplers are used to couple signal paths to a common source or load with the use of power handling hybrid couplers, along with ferrite isolators, filters and load terminations.
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Filter-Ferrite Combiner Manual
The Ferrite-Filter type of combiner has become the mainstay of operations in commercial and public safety systems.
Download PDFMulticoupler Manual
EMR receiver multicouplers include a basic chassis on which a high performance, low noise amplifier and its power supply are mounted. A preselector is placed between the receiving antenna and the amplifier input according to the band of operation desired.
Download PDFRF Isolator Manual
This bulletin addresses the ways in which RF Isolators are applied to control interference due to intermodulation products and to provide a variety of benefits.
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Nothing from March 29, 2023 to June 29, 2023.