TWIN TMA 1800/2100

Designed to be deployed in co-located 1800 & 2100MHz systems with wideband antennas, the Kaelus TMA2053 provides internal diplexing and gain in both bands, thereby saving hardware costs.


  • Improved base station sensitivity through gain in the 1800 and 2100 uplink bands
  • Hardware & software configuration using AISG “personality” upload
  • Excellent noise figure performance
  • Internal diplexing of 1800 and 2100MHz bands
  • AISG2.0 compatible
  • Compact, low weight

technical specifications
Band Name 1800 BAND 2100 BAND
Passband 1805 - 1880MHz 2110 - 2170MHz
Insertion loss 0.6dB typical 0.4dB typical
Return loss 18dB minimum (VSWR <1.3:1)
Maximum input power 200W (average) / 2kW (PEP) 120W (average) / 2kW (PEP)
Intermodulation products -161dBc typical /-153dBc maximum with 2 x 20W carriers (in RX band) @ antenna port -163dBc maximum with 2 x 20W carriers (in RX band) @ antenna port
Passband 1710 - 1785MHz 1920 - 1980MHz
Gain 12dB
Gain variation ±1dB maximum
Return loss 18dB minimum
Bypass return loss 12dB
Bypass loss 2.5dB typical 2.9dB typical
Noise figure 1.25dB typical 1.35dB typical
Output IP3 +30dBm typical
Maximum input power with no damage +12dBm
Impedance 50Ohms
power supply and alarm (current window alarm mode, default)
Current window alarm mode (CWA) is the default TMA operating mode and can be configured to specific customer requirements. The generic personality (F00) is configured so that both channels are independently powered and monitored via the respective BTS port. The BTS port sinks additional current to indicate an alarm state in its uplink path. Normal operating and alarm current values are configured independently and are alterable via a field-loadable personality file, contact Kaelus for more information.
DC supply voltage 7.5V to 30V DC, case is DC ground, via BTS-RF cable
DC supply voltage via BTS-RF cable F00 Version: each BTS port powered individually (programmable)
DC supply current, normal mode 150 ± 15mA per port (assumes both ports are powered)
DC supply current, alarm mode 220 ± 20mA per port (assumes both ports are powered)
aisg mode of operation (auto selected on valid aisg 2.0 frames)
AISG signals can be applied to either BTS1 or BTS2 port. The TMA unit switches to AISG mode when valid frames are detected on one of the BTS ports. Both LNAs take DC power from the port with AISG frames or, if DC is present on both ports, both channels supply equal power to the TMA.
DC supply voltage 7.5V to 30V DC
AISG version 2.0 (1.1 optional)
Supply current, AISG mode 265mA @ 7.5V, 75mA @ 30V typical
Voltage drop, BTS to AISG port 1.5V maximum at 2A
AISG connector, current rating IEC60130-9, 8-pin female ,< 4A peak, 2A continuous, pin 6
Field firmware upgradable Yes
For further details of environmental compliance, please contact Kaelus.
Temperature range -40ºC to +65ºC | -40°F to +155°F
Ingress protection IP67
Altitude 2,600m | 8,530ft
Lightning protection IEC61312-1, RF: ±5kA maximum (8/20us), AISG: ±2kA maximum (8/20us)
MTBF >1,000,000 hours
Compliance EMC:EN301 489, Environment: ETSI EN 300 019 class 4.1, RoHS
Dimensions H x D x W 168 x 300 x 93mm | 6.6 x 11.8 x 3.7in (excluding brackets and connectors)
Weight 7.9kg | 17.4lbs
Finish Powder coated, light grey (RAL7035)
Connectors RF: DIN 7-16 (F) (V3) or 4.3-10 (V4) x 4 long neck
AISG: IEC60130-9, 8-pin female
Mounting Pole/wall bracket supplied with two metal clamps 45-178mm diameter poles
ordering information
Part Number Configuration Optional Features Connectors
Kaelus TMAs can be uploaded with customer specific CWA configuration, customer specific firmware (FW) and a custom bracket (BKT). Please contact Kaelus for more information.
TMA2053F00V1-1 TWIN 2 in / 2 out Configured with generic personality DIN 7-16 (F)
TMA2053F03V2-4 TWIN 2 in / 2 out CUSTOM CWA, BKT DIN 7-16 (F)
TMA2053F03V3-4C TWIN 2 in / 2 out CUSTOM CWA, BKT, FW DIN 7-16 (F)
electrical block diagram
mechanical block diagram