QUADRUPLEXER 1800/2100/2300/2600

Kaelus world proven outdoor solutions provide strong RF performance coupled with rugged features. Designed to combine 1800/2100/2300/2600 bands, this Quadruplexer saves significant capital and operational expenses by limiting feeder runs, and components needed on the tower.

Microdata Telecom rebranding to Kaelus!
Microdata Telecom and Kaelus have had combined operations since Oct 2019 when Microdata acquired Kaelus. We strongly believe that by operating under one global brand we will clarify our strengthened position in the telecom market and from January 18th 2021, we are unifying the brands to Kaelus. The MI-261 and the KA-4002 are the same product but to ease the transition for our customers both Kaelus and Microdata part numbers will be maintained.

MI-261: part number under Microdata brand
KA-4002: part number under Kaelus brand


  • Combines 1800/2100/2300 and 2600 bands
  • Very low insertion loss
  • Very low passive intermodulation
  • DC/AISG bypass field settable
  • Wall or pole mounting
  • High power handling
  • Single and twin configurations available

technical specifications
Band Name 1800 2100 2300 2600
Passband 1710 - 1880MHz 1920 - 1980MHz
2110 - 2170MHz
2300 - 2400MHz 2500 - 2690MHz
Insertion loss 0.2dB typical, 0.4dB maximum 0.2dB typical, 0.5dB maximum in 1920-1980MHz
0.2dB typical, 0.35dB maximum in 2110 - 2170MHz
0.2dB typical, 0.3dB maximum 0.2dB typical, 0.3dB maximum
Return loss 19dB typical, 18dB minimum
Maximum input power 250W (average) * 250W (average) * 250W (average) * 250W (average) *
Intermodulation products < -160dBc at 2 x 43dBm TX Carrier < -160dBc at 2 x 43dBm TX Carrier (IM7) < -160dBc at 2 x 43dBm TX Carrier < -160dBc at 2 x 43dBm TX Carrier
Rejection to other band 50dB
(*) Limited to 500W (average) combined power at the common port.
Impedance 50Ohms
dc / aisg
Compliance 3GPP, TS 25.461 3GPP, TS 25.461
Passband 0 - 3MHz 0 - 3MHz
Insertion loss, single DC/AISG pass 1dB maximum 1dB maximum
Return loss, single DC/AISG pass 12dB minimum 12dB minimum
Insertion loss, two DC/AISG pass 4.5dB maximum 4.5dB maximum
Return loss, two DC/AISG pass 6dB typical 6dB typical
Input voltage range 8 – 31V DC 8 – 31V DC
DC current rating 3A 2A
Power consumption   0.3W
Port priority (combiner mode)   Refer Ordering Information
For further details of environmental compliance, please contact Kaelus.
Temperature range -40ºC to +65ºC | -40ºF to +149ºF
Ingress protection IP67
Lightning protection 5kA maximum (8/20us)
MTBF > 1,000,000 Hours
Compliance Operation: ETSI EN 300 019 class 4.1E
Storage: ETS 300 019-1-1 class 1.3E
Transport: ETS 300 019-1-2 class 2.3
Feature Single
1 in / 4 out
2 in / 8 out
Dimensions H x D x W 225 x 160 x 49mm | 8.86 x 6.30 x 1.93in (excluding brackets & connectors) 225 x 160 x 89mm | 8.86 x 6.30 x 3.50in (excluding brackets & connectors)
Weight 2.8kg | 6.2lb 4.6kg | 10.1lb
Finish Powder Coated, light grey, NCS 1502-R
Connectors 4.3-10 (F) long neck
Mounting Pole/wall bracket supplied with two metal clamps for 45-178 mm diameter poles
shipping information
Feature SINGLE
1 in / 4 out
2 in / 8 out
Carton size 350 x 310 x 150mm 350 x 310 x 210mm
Gross weight (including packaging) 3.3kg 5.1kg
ordering information
Part Number Configuration Optional Features Connectors DC/AISG Configuration
KA-4002-1032 SINGLE 1 in / 4 out FIXED DC
4.3-10 (F) DC TO ALL
KA-4002-2032 TWIN 2 in / 8 out FIXED DC
4.3-10 (F) DC TO ALL
MI-26141 TWIN 2 in / 8 out FIXED DC
4.3-10 (F) NO DC
electrical block diagram
KA-4002-WXYZ where
  • X denotes the configuration: W=1, single 1:4 and W=2, twin 2:8
  • Z denotes the DC/AISG configuration (see ordering information)
MI-261-XZ where
  • X denotes the configuration: X=1, single 1:4 with 7-16 (F), X=2, twin 2:8 with 7-16 (F), X=3, single 1:4 with 4.3-10 (F), X=4, twin 2:8 with 4.-10 (F),
  • Z denotes the DC/AISG configuration (see ordering information)
  • BAND1 port is 1800 band
  • BAND2 port is 2100 band
  • BAND3 port is 2300 band
  • BAND4 port is 2600 band
For clarity, only Electrical Block Diagram for the Fixed DC and single unit is shown
mechanical block diagram