UHF Antenna Multicoupler
Rio Rancho, NM
3
UMC16B RF Signal Distribution
A
IN
Ceramic Resonator
Filter
A OUT
Strip Line
RF Power
Divider
B
IN
Ceramic Resonator
Filter
Low Noise
Amp
Strip Line
RF Power
Divider
Low Noise
Amp
B OUT
Introduction
The UMC16B multi-coupler is used to distribute the
signals from two antennas to eight diversity receivers to
minimize the amount of cabling and antennas needed
in multi-channel wireless systems. The design com-
bines broad band ceramic filtering with low noise, high
intercept point RF distribution to provide outstanding
performance and flexibility. Up to eight diversity receiv-
ers or up to 16 non-diversity receivers can be utilized
across a 230 MHz passband.
The UMC16B can be powered from an external supply,
12 to 18 VDC for mobile applications, or from 90 to 240
VAC for installations using the regulated power supply
furnished with the unit. A locking connector on the rear
panel secures the power connection.
Contents
Introduction ..........................................................................3
Block Diagram ......................................................................3
Front and Rear Panels .........................................................4
Antenna Power Jumpers ......................................................4
Antenna Use and Placement ...............................................5
Accessory Antennas ............................................................5
Specifications .......................................................................6
Service and Repair ..............................................................6
Returning Units for Repair ...................................................6
Mailing Address ...................................................................6
Shipping Address .................................................................6
Telephones ...........................................................................6
Warranty.............................................................. Back Cover
The RF signals at the inputs first pass through a ceram-
ic filter to block energy above and below the passband.
The signal is then fed to a high current amplifier to ap-
ply the gain needed ahead of the splitter. The amplifier
is a high current type with a very high IP3 (third order
intercept) that minimizes intermodulation products.
The amplifier output is then distributed to the output
jacks using a Wilkinson “strip line” RF splitter. Unused
outputs should be terminated with 50 Ohm dummy
loads for maximum performance, however, the splitter
design allows unused jacks to remain un-terminated
with only a slight effect on other channels (+/- 1 to 2 dB
in the level at the outputs).
The unit is housed in a standard 19 inch rack mount as-
sembly with rugged connectors.
