TMA2144 | MI-153


Designed to be deployed in collocated 1800 & 2100 systems, this Tower Mounted Amplifier enhances cell uplink coverage through improved system noise figure, thereby saving operational and capital expenditure. It also has antenna ports for the low band , 698-960MHz.

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-153 and the TMA2144 are the same product but to ease the transition for our customers both Kaelus and Microdata part numbers will be maintained.

MI-153: part number under Microdata brand
TMA2144: part number under Kaelus brand


  • Improved base station sensitivity through gain in the 1800 and 2100 uplink bands
  • 4 antenna ports: 2xLow Band and 2x1800/2100
  • Excellent noise figure performance
  • Internal diplexing of 1800 and 2100MHz bands
  • Full AISG operation and RET antenna support, AISG2.0 compatible
  • Small and light for minimum visual impact

technical specifications
Band Name 1800 2100
Passband 1805 - 1880MHz 2110 - 2170MHz
Insertion loss 0.5dB typical 0.3dB typical
Return loss 20dB typical, 18dB minimum
Maximum input power 200W (average) / 2000W (PEP)
Intermodulation products -160dBc in RX band at ANT
Passband 1710 - 1785MHz 1920 - 1980MHz
Gain 12dB
Return loss 20dB typical, 18dB minimum
Bypass return loss 14dB typical, 12dB minimum
Bypass loss 2.0dB typical
Noise figure 1.5dB typical 1.4dB typical
Output IP3 +25dBm typical
Maximum input power with no damage +12dBm
bypass path lb
Passband 694 - 960MHz
Return loss 18dB
Insertion loss 0.2dB typical
Maximum input power with no damage 200W (average) / 2000W (PEP)
Impedance 50Ohms
aisg mode of operation (auto selected on valid aisg 2.0 frames)
AISG signals can be applied to the BTS ports. The TMA unit switches to AISG mode when valid frames are detected on either port. Each LNA is controlled uniquely by its sub-unit number.
DC supply voltage +9.0V to +30V DC
AISG version 2.0
Power consumption, AISG mode < 4W
AISG connector, current rating IEC60130-9, 8-pin female, 1.6A
For further details of environmental compliance, please contact Kaelus.
Temperature range -40ºC to +65ºC | -40°F to +155°F
Ingress protection IP67
Lightning protection IEC61312-1, RF: ±5kA (8/20us), AISG: ±2kA (8/20us)
MTBF >1,000,000 hours
Compliance EMC: EN 301 489-50
Safety: EN 62368-1
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
Dimensions H x D x W 231 x 224 x 109mm | 9.09 x 8.82 x 4.29in (excluding brackets and connectors)
Weight 7.55kg | 16.64lbs
Finish Powder coated, NCS 1502-R
Connectors DIN 7-16 (F) long neck or 4.3-10 (F) long neck (see ordering information)
Mounting Pole/wall bracket using two metal clamps, suits 40-140mm diameter poles
shipping information
Carton size 360 x 290 x 180mm
Gross weight (including packaging) 8.2kg
ordering information
Part Number Configuration Optional Features Connectors AISG Mode
TMA2144F01V1-1 TWIN, 2 in / 4 out BASE MODEL - KAELUS BRAND 4.3-10 (F) Refer to AISG MODE OF OPERATION section
TMA2144F01V2-1 TWIN, 2 in / 4 out BASE MODEL - KAELUS BRAND 7-16 (F) Refer to AISG MODE OF OPERATION section
MI-15332 TWIN, 2 in / 4 out BASE MODEL - MICRODATA BRAND 4.3-10 (F) Refer to AISG MODE OF OPERATION section
MI-15302 TWIN, 2 in / 4 out BASE MODEL - MICRODATA BRAND 7-16 (F) Refer to AISG MODE OF OPERATION section
electrical block diagram
mechanical block diagram