400-490 MHz Pass/reject duplexer DPR4-4U, DPR8-4U

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DPR4-4U

DPR8-4U

Electrical specifications

Model	DPR4-4U	DPR8-4U
Operating Frequency band, MHz	400-490
Insertion loss (adjustable) not more, dB	1,5
Frequency separation TX/RX (min), MHz	2	1,5
Impedance, Ohm	50
Isolation, not less, dB	75
VSWR, not more than	1,5
Input power, not more, W	not more than 200
Temperature range, °C	from -30 to +60
Cavity electrical length	1/4λ

Mechanical specifications

Model	DPR4-4U	DPR8-4U
Diameter, mm (ins.)	110 (4")	206 (8")
Weight, kg	6	8,3
Connector	N-female
Mount to 19-inch rack	yes
Dimensions (LxWxH), mm	480x150x360	480x420x360

DPR4-4U is a classical band pass-reject duplexer for manufacture of single-channel UHF, separation between receiving and transmission frequency here is 5-10 MHz, repeater. Duplexer narrowband characteristic provides higher selectivity of repeater receiving section and attenuates transmitter out-of-band radiation better, than in common mobile duplexer case.

Typical duplexers response curves

DPR4-4U

DPR8-4U