X-Band QTRM Demonstrator - MAIA-009446-000000
• RS485 Half-Duplex, 5.0 Mbps serial data bus for control and monitoring.
• DSP externally programmable via JTAG
• Factory amplitude and phase setting inaccuracies calibrated at the cold-wall operating
temperature
• TX output power, HPA temperature, operating current and power supply health monitored and
reported on request
• Automatic shut-down if internal temperature reaches a critical limit where damage could occur.
Hysteresis applies.
• Positive supplies inhibited (with the exception of the digital control circuits)
if negative supply is lost
• Direction cosines used for beam steering
• 4-bit array address code giving up to 16 QTRM sub-array (64- element array)
• TRM’s respond to individual address or broadcast messages.
• Module position assignment
• Ability to schedule up to 16 phase & amplitude settings for rapid execution.
• Array CAL allows end-user to add additional TRU phase & amplitude calibration.
• Read-back of set phase & amplitude values for each TRU.
• Selection of internal/external Clock source.
• European Manufacture.
QTRM - Quad Transmit Receive Module (4-Channel T/R Module)
Electrical Performance
Parameter Min. Typ. Max. Units Conditions
Parameters: Common
Centre Frequency 9.5 GHz
Operating BW 1 GHz See Note 1
TX/RX Switching Speed
50 ns Target. From receipt of Gating pulse.
Port-Port Isolation (Antenna)
40 dB Target 60dB
Input Return Loss
10 dB
Output Return Loss (Antenna) 10 dB
Pulse Width
0.2 100 μS
80µS at 30% Duty max.
Duty Cycle
5 30 %
RF Pulse Rise & Fall time 20 ns
Data Control Rate 5.0 Mbps Asynchronous UART RS485 Bus.
Global TX Gating Pulse
Differential
Gate TX PA on 1.0 µS before RF pulse
Beam Steering Pulse
Differential
No. of Stored Beam Settings 16 Scheduler Mode
Beam Steer Pulse Repetition Rate 15 250 μS
Scheduler Mode – Beam direction change rate.
Power Supplies +28,+6,-6 V
Ext. Clock (If used) MHz ±20ppm LVDS
DC Input CurrentPort)
6 Amps (pk) +28v supply, TX mode
1.8 Amps +6v supply, TX mode
0.2 Amps -6v supply
DC Input Consumption (Pk) 170 Watts (pk) TX mode
Phase Control
Phase Shift Range
RMS Error
9.0 – 10.0GHz
Switching Time
0 355 deg 6-Bits, 64 States, 5.625° Steps.
2 4 deg See Note (2)
500
ns
Target. From receipt of Beam Steer pulse.
Amplitude Control
Attenuator Range
RMS Error
9.0 – 10.0GHz
Switching Time
0 28.5 dB 5-Bits, 32 States, 0.9dB Steps. See Note (3)
0.4 0.6 dB See Note (4)
500
ns
Target. From receipt of Beam Steer pulse.
Over T
OP
Unless Otherwise stated. Limits & Conditions are indicated values. Indicated
values given per channel unless otherwise stated.
Notes
(1) Can operate over a wider bandwidth at reduced performance. Limited by circulator bandwidth.
(2) RMS Phase error given for reference attenuator state.
(3) Up to 3dB reduction in useable attenuation range due to Calibration.
(4) RMS Attenuator error given for reference phase state.
(5) Figure given for Ref Attenuator state, Ref Phase State.
(6) Noise Figure given for Ref Attenuator state, Ref Phase State.
Enviromental
Operating Ambient: -30 to +70°C. Assumes QTRM is xed to a cold-wall held at 35 ±10 °C
Storage: -40 to +85°C; MTBF : 100,000 hrs target