140-156 MHz Mobile duplexers MDF1-6VM, MDF1-6VL4.5/6 MDF1-6VL6/8, MDF1-6VL8/10

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Electrical specifications

Model MDF1-6VM MDF1-6VL4.5/6 MDF1-6VL6/8 MDF1-6VL8/10
Operating Frequency
band, MHz		 148-149/171-173 138-156 138-156 138-156
Insertion loss
(adjustable) not more, dB		 0,9 1,3 1.3 1.3
Frequency separation
TX/RX (min), MHz		 24 4,5-6 6-8 8-10
Impedance, Ohm 50 50 50 50
Isolation, not less, dB 75 80 80 80
Typical isolation, dB 80 90 90 90
VSWR, not more than 1.5 1.5 1.5 1.5
Input power, not more than, W 50 50 50 50
Temperature Range, °C from -30 to +50 from -30 to +50 from -30 to +50 from -30 to +50

Mechanical specifications

Model MDF1-6VM MDF1-6VL4.5/6 MDF1-6VL6/8 MDF1-6VL8/10
Weight, kg 0,93 0,93 0,93 0,93
Connector N-female N-female N-female N-female
Length/Width/Depth, mm 225x156x32 225x156x32 225x156x32 225x156x32


Availability of full duplex mobile radio stations on the market has initiated strong interest in duplex filters providing simultaneous operation of mobile station into common antenna. We are producing such devices now. These are mobile duplex filters MDF1-6V and MDF1-6VM for VHF range applicable to telecommunications networks operating in 148/172 MHz frequency range. Compact mobile duplexers are manufactured using six-section helical resonators by rejection design. At frequency separation of 4-6 MHz (MDF1-6VL4.5/6), 6-8 MHz (MDF1-6VL6/8), 8-10 MHz (MDF1-6VL8/10) and 24 MHz (MDF1-6VM) they provide full duplex operation mode of mobile radio stations at minimum loss and standard power output of 50 Watt. Dimensions of MDF1-6V duplexer allow its mounting into the same case with radio station. However, one should notice, that such duplexers are ineffective, when implemented in base stations or at the sites with compromised electromagnetic compatibility.

Typical duplexers response curves

MDF1-6VM

MDF1-6VL4.5/6

MDF1-6VL6/8

MDF1-6VL8/10

The information provided on this page is not an official offer.
To verify actual parameters contact the sales department before ordering.