C-Band QTRM Product Capability QTRM - Quad Transmit Receive Module (4-Channel T/R Module) • • • • • • • • • • • • • • Gallium Nitride Power Amplifier Technology 1GHz Bandwidth Low Noise Figure (<4.5dB) 6-Bit Phase Control 6-Bit Attenuator Control Single +28V Supply BITE and PSU Supervisory Built in Tx and Rx Power BITE Detectors Factory Calibrated Accessible memory for External Calibration data Cooling interface Designed to fit Typical Antenna Aperture Spacing Line Replaceable Unit European Manufacture. Description The C-Band Module contains four Transmit/Receive (T/R) channels providing four RF ports which can be connected to individual antenna elements to form part of a phased array active antenna unit. The module is fitted with blind mate RF connectors and its height and antenna port spacing dimensions are specifically designed to allow direct connection to the back of antenna aperture face. Alternatively, RF cable assemblies may be used to connect to the individual antenna elements. The power amplifier section of each channel incorporates Gallium Nitride technology, this along with provision for liquid cooling allows high power levels, long pulse widths and high duty cycles to be realised. The Module is supplied from a single 28 volt DC supply and contains the necessary supply conditioning to power the four channels. Built in power supply sequencing and built in test equipment (BITE) functions are included to allow individual channel monitoring and shut-down in the presence of a fault condition. Module communication for control and monitoring is provided by a half-duplex, asynchronous serial EIA485 bus. The serial data takes the form of a number of messages assigned to either control the individual T/R channels or to retrieve information about the module’s settings or health status. RF2M have developed a Graphical User Interface (GUI) to control and monitor the module which can be run from a laptop or desktop computer. Each module has a unique address which may be interrogated by an external controller; this allows the external controller to address and individual module within an array. The QTRM’s are factory calibrated to minimise amplitude and phase variations over temperature and frequency, making them line-replaceable units. Additional calibration constants that are User system related (such as the interface between the radiating element to T/R channel and any associated antenna taper requirements) can be uploaded to the module via the EIA485 serial data link. The QTRM supports ‘scaleable’ AESA Radar thus providing flexibility for different platforms applications. Mechanical Approximate Size: 150 mm(L) x 128 mm(W) x 28 mm(H) excluding connectors Approximate Mass: 1.2 Kg RF Connectors: Male SMP DC Connectors : 37-way Micro-D (Power Supply & Control) and 15-way Micro-D (Factory Use Only) plugs Hydraulic Connectors : Staubli non-spill CGO 03 type or Similar Cooling Fluid : Glycol Mix Inlet Temperature: +48°C max. Fluid Flow Rate : 1Litre/min Typ Pressure Drop : < 0.2 bar with a fluid flow rate of 1L/min Environmental Operating Ambient: -40 to +70°C Dependent upon Transmit Pulse Width, Duty Cycle and Inlet Cooling Fluid Temperature. Storage: -40 to +85°C NOTES (1) Up to 3dB reduction in useable attenuation range due to factory Calibration (2) Gallium Nitride Power Amplifier technology enables long pulse durations (3) Figure given for Ref Attenuator state, Ref Phase State Electrical Performance Over TOP Unless Otherwise stated. Limits & Conditions are indicated values. Indicated values given per channel unless otherwise stated. Parameter Min. Typ. Max. Units Conditions Parameters: Common Centre Frequency 5 GHz Operating BW 1 GHz Input Return Loss 12 dB Common RF In/Out port Output Return Loss 12 dB Individual Antenna ports Differential RS485 Serial Data Bus Data Control Rate 5.0 TX PA Gating Pulse Differential Beam Steering Pulse Differential Asynchronous UART, half-duplex Mbps Asynchronous UART RS485 Bus. Triggers Beam Direction change No. of Stored Beam Settings 16 Beam Steers Data Transfer Time 350 Scheduler Mode μS Time taken to re-load Scheduler register Supply Voltage +28 Volts Supply Current 7.5 Amps Average current @ 28v. 50% duty DC Input Consumption 210 Watts Average power @ 28v. 50% duty 31.5 dB 6-Bits, LSB = 0.5dB, See Note 1 dB Reference Phase State deg 6-Bits, LSB = 5.62° deg Reference Attenuation State Amplitude Control Attenuation Range RMS Attenuation Error 1.5 Phase Control Phase Shift Range 355 RMS Phase Error Parameter 4.5 Min. Typ. Max. Units Conditions Parameters: Transmit TX Psat 8.5 TX Input Power Level +18 dBm Spurious -60 dBc Pulse Droop 0.2 dB 100 μS, 10% Duty Cycle Pulse Droop (Long Pulse) 0.4 dB 40 mS, 80% Duty Cycle, See Note 2 Harmonics -30 dBc TX Insertion Phase Balance ±15 deg ±1.25 dB TX Power Balance Watts(pk) Per Channel For Saturated Power Parameters: Receive RX Output P1dB +6 dBm RX Gain 15.5 dB RX Noise Figure 4.5 dB Receiver Protection per Channel 100 dB RX Insetion Phase Balance ±15 dB ±1.25 dB RX Gain Balance See Note 3 300 μS Pulse Functional Block Diagram Single TRM Element Block diagram QTRM Block diagram Whilst every effort is made to ensure the accuracy of the information contained in this brochure, no responsibility can be accepted for any errors and/or omissions. Descriptions and specifications of products are subject to change without notice. +44 (0) 1908.574.200 [email protected] micro.apitech.com +1 855.294.3800 www.apitech.com