Integrating a high-density active phased array front-end into mobile or stationary host platforms requires well-defined boundaries across RF signaling, DC power delivery, command routing, and thermal management. Operating in the 15.7 GHz to 17 GHz band, the Ku-Band 768-Channel Two-Dimensional Phased Array Antenna combines 768 active functional channels, the antenna structure, an antenna-in-package (AIP) module, internal power divider circuitry, and sum/difference networks into an integrated mechanical housing measuring ≤400 mm × 420 mm × 129 mm with a total mass of ≤17 kg (excluding external frequency synthesis and signal processing units).
Platform Interfacing Boundaries for 2D Active Arrays
The front-end assembly interfaces with external platform subsystems through distinct physical and electrical boundaries:
Technical Specs & Engineering Support
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- Integrated Mechanical Packaging: The structural housing encapsulates the active antenna aperture, the AIP module, the internal power divider, and the sum/difference networks within a unified metallic enclosure that includes rear structural compartment components.
- Platform-Level Signal Processing Partition: The array interfaces with platform-level RF and signal-processing subsystems, while external frequency synthesis and digital signal processing remain outside the internal mechanical envelope.
- Two-Dimensional Beam-Steering Coverage: The planar aperture supports coordinated electronic beam steering across ±45° in azimuth and ±45° in pitch, with a specified beam-pointing error of ≤0.2° across the scan range.
RF Interfaces and Excitation Drive Specifications
The RF subsystem defines the signal boundary between the array front-end and the platform-level transceiver hardware:
- RF Connector Configuration: The antenna uses SSMP-J connectors for RF signal routing, including dedicated ports for azimuth and pitch difference outputs.
- RF Input Drive Level: The internal distribution network is configured to accept a nominal RF excitation drive specified at ≥20 ± 2 dBm across the 15.7 GHz to 17 GHz operating frequency range.
- Internal Distribution: An internal divider routes the single RF input to individual active channels for amplification and phase control, reducing the need for external RF power-distribution hardware.
- System Integration Reference Parameters: Key electrical, interface, and mechanical integration specifications are summarized below:
| Parameter | Key Integration Specifications |
| Operating Frequency Band | 15.7 GHz – 17 GHz |
| RF Interface Connector | SSMP-J (including Azimuth/Pitch Difference Ports) |
| Input Excitation Level | ≥20 ± 2 dBm |
| Full-Array Peak Output Power | ≥55 dBm |
| System EIRP (Normal) | ≥88.5 dBm (room temperature) |
| DC Power Supply Input Voltage | DC 18 V – 36 V |
| Maximum DC Power Consumption | ≤1000 W (under 30% duty cycle) |
| Prime Power Interface | Dedicated J30J-4-pin high-current connector |
| Array Control Interface | Dedicated J30J_15TJL connector |
| Mechanical Envelope | ≤400 mm × 420 mm × 129 mm (includes rear compartment) |
| Total Assembly Mass | ≤17 kg (excludes frequency synthesizer/signal processor) |
DC Power Bus Architecture and Pulsed Load Management
The platform power distribution system must accommodate the specified 18 V to 36 V input range and the DC power demand of the active transmitter:
- Input Voltage Range (18 V – 36 V DC): The internal power conditioning circuits accept an unregulated DC bus voltage from 18 V to 36 V DC.
- Prime Power Delivery Interface: Main DC power is supplied through a dedicated J30J-4-pin high-current connector designed to manage current levels during high-power operation.
- DC Power Consumption Budget: Maximum DC power consumption is specified at ≤1000 W under a 30% operational duty cycle.
- Pulsed Operation Demands: The transmitter architecture supports operating duty cycles up to 30%. Host platform power buses should be designed to provide adequate transient response and maintain the bus voltage within the 18 V to 36 V operating window during pulsed RF transmission.
Control, Mechanical, and Thermal Integration Requirements
Successful mechanical bay integration depends on aligning physical mounting and environmental limits with array design constraints:
- Command and Steering Interface: Beam steering coordinates, timing, and monitoring signals pass through a dedicated J30J_15TJL control connector.
- Physical Form Factor and Clearance: The unit maintains an overall envelope of ≤400 mm × 420 mm × 129 mm (inclusive of the rear compartment structural components), requiring structural consideration for its ≤17 kg mass during installation.
- Operating and Storage Thermal Boundaries: The unit is rated for an operating temperature range of -40 °C to +70 °C and an ambient storage range of -50 °C to +70 °C.
- Thermal Dissipation Management: Platform designers must provide adequate cooling mechanisms at the mounting interface to remove thermal dissipation generated by the array when operating at its specified DC power budget (≤1000 W at a 30% duty cycle), ensuring the assembly remains within its operating window.
- Protective Cavity Finishes: The metal cavity features a conductive oxide layer, while the exterior antenna surface is finished with white primer.
Frequently Asked Questions (System Integration)
Q: Does the 768-channel array require external power divider networks to distribute input RF excitation?
A: No. The antenna enclosure integrates an internal power divider module that distributes the incoming RF drive (specified at ≥20 ± 2 dBm) across all 768 active channels. External RF excitation is connected through the designated SSMP-J RF interface, reducing the need for external distribution hardware.
Q: How should the host platform power supply be dimensioned for pulsed transmission?
A: The platform power supply should be sized to deliver an unregulated DC voltage between 18 V and 36 V via the J30J-4-pin high-current connector, supporting up to 1000 W DC power during a 30% operational duty cycle while keeping the array input voltage within its specified 18–36 V range during pulsed load transitions.
Q: What external subsystems are excluded from the antenna assembly envelope?
A: The ≤17 kg mechanical assembly integrates the radiating aperture, AIP module, internal power divider, and sum/difference networks. External platform electronics—specifically the platform’s frequency synthesizer and digital signal processor—are located off-array and interface via external cabling.