Dual Duplexed Filter 850

Suitable for outdoor applications, bandpass filters pass Tx and Rx WCDMA850 sub-bands while attenuating GSM900 receive band signals and microwave link noise near 850MHz.


  • For use with WCDMA850 node-B with co-located GSM900 systems
  • Excellent power handling capability
  • Excellent EVM performance for high performing networks
  • Low insertion loss with high rejection using combine technology
  • Provides rejection of microwave link frequencies between near WCDMA850 uplink and downlink frequency bands
  • Covers FA01, FA02 and FA03 channels

technical specifications
downlink (bts)
Passband 875 - 884.6MHz
Insertion loss 1.0dB maximum / 0.85dB typical at band edge
0.6dB typical at mid-band
Return loss 20dB minimum
EVM 8% maximum, 2.5% typical (CF=882.2MHz)
8% maximum, 1.6% typical (CF=877.2MHz)
Group delay variation Across 3.84MHz
60ns maximum / 35ns typical (CF=882.2MHz),
50ns maximum / 25ns typical (CF=877.4MHz)
Across passband= 100ns maximum / 50ns typical
Absolute group delay 250ns maximum / 170ns typical
Maximum input power 320W (average) / 4kW (PEP)
uplink (rx) path
Passband 830 - 844.6MHz
Insertion loss 1.0dB maximum / 0.85dB typical at band edge
0.5dB typical at mid-band
Return loss 20dB
Group delay variation Across 3.84 MHz
50ns maximum / 20ns typical (CH FA03 and FA02),
100ns maximum / 70ns typical (CH FA01)
Across passband= 200ns maximum / 100ns typical
Absolute group delay 500ns maximum / 200ns typical
891.6 - 898.3MHz 86dB minimum
847 - 852MHz 20dB minimum
Impedance 50ohms
Intermodulation products <-150dBc with 2 x 20 W carriers (3rd order)
Maximum input power 100W (average) / 800W (PEP)
dc / aisg
Passband 0 - 3MHz
Insertion loss 1dB maximum
Return loss 12dB minimum
Input voltage range +/- 33V maximum, 1 Amp
For further details of environmental compliance, please contact Kaelus.
Temperature range -20ºC to +60ºC | 4ºF to +140ºF
Ingress protection IP67 (for housing)
Altitude 2000m | 6,560ft maximum
Lightning protection Gas arrestor fitted on ANT port. M6 earth stud fitted
Dimensions H x D x W 297 x 380 x 78mm | 11.7 x 14.96 x 3.1in
Weight 12kg | 26.45lbs
Connectors DIN 7-16 (F) x 2, IP68 rated
Mounting Pole/wall bracket supplied with two metal clamps for 45-178 mm diameter poles
ordering information
Part Number Description
DDF0021F1V1-1 Dual Duplex Filter WCDMA850, outdoor, BW=3 channels, attenuation in 852-862MHz and in GSM Rx
mechanical block diagram