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Duplexers / Diplexers

DCI broadband duplexers are used to connect broadband transmitters and receivers to the same antenna for simultaneous operation. They provide excellent isolation between RX and TX, suppress intermod from adjacent signals, and provide additional lightning protection with DC grounded inputs. They are useful where the TX and RX use a range of frequencies such as multi-channel trunked systems or video repeaters.

  • Each duplexer is made up of two band pass filters linked together into a 3-port device with a cable harness.
  • Exceptional skirt selectivity has improved results with co-located cellular and trunking systems; with less desense and greater sensitivity offered to both systems.
  • Low loss, low SWR.
  • Power handling up to 1 kW.

Prices are based on 2 bandpass filters plus a harnessing fee.

Duplexer / Diplexer Examples

All of the following samples may be used as duplexers or diplexers.
Description Graphs Configuration Channel Isolation* Poles Dimensions (WxDxH)
6 meter Duplexer Connector: N
Mounting: Rack
Harness: RG-142
 > 90 dB 8 and 8 19" x 7" x 12"
VHF TV Duplexer Connector: N
Mounting: Rack
Harness: RG-142
 > 44 dB 4 and 4 19" x 7" x 6"
UHF Wide-Band Duplexer Connector: N
Mounting: Rack
Harness: RG-214
 > 50 dB 6 and 6 19" x 10" x 9"
UHF Duplexer Connector: N
Mounting: Tabs
Harness: Hard Harness
 > 70 dB 6 and 6 12" x 10" x 4.5"
FM Duplexer Connector: N
Mounting: Rack
Harness: RG-142
 > 39 dB 6 and 6
ISM and WiFi Duplexer Connector: N
Mounting: Tabs
Harness: Hard Harness
Extras: 2 x 3rd Harmonic Traps
 > 90 dB 10 and 10 15.5" x 6" x 3.25"
900 MHz Duplexer Connector: N
Mounting: Rack
Harness: RG-142
Extras: Isolators
 > 70 dB 8, 4 notches and 8, 4 notches 19" x 10" x 25.5"
WiFi Duplexer Connector: SMA
Mounting: None
Harness: Internal
 > 64 dB 6 and 6 7" x 4.5" x 2.25"
2.5 GHz Duplexer Connector: N
Mounting: Rack
Harness: RG-142
 > 49 dB 5 and 5 19" x 6.5" x 4"
* Channel Isolation measured in dB to adjacent channel center




DCI Digital Communications Ltd.

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