Ku-Band 384-Channel 2D Phased Array System Integration: RF Interfacing, Power Bus Design, and Platform Constraints

Integrating a 384-channel active phased array requires clearly defined RF, power, control, mechanical, and thermal interfaces between the antenna front-end and the host platform. In radar tracking and directional communications, the Ku-Band 384-Channel Two-Dimensional Phased Array Antenna integrates 384 active functional units, an antenna-in-package (AIP) module, an internal power divider module, and sum/difference networks within a unified 315 mm × 315 mm × 39 mm metal enclosure weighing ≤4 kg.

Host Platform Interfacing for 2D Active Arrays

The antenna integrates with the host platform through designated RF, power, control, and mechanical interfaces:

• Integrated Subsystem Structure: The metal chassis houses the antenna structure, AIP module, internal power divider module, and sum/difference network within a single mechanical assembly.
• Defined External Interfaces: RF signals, DC prime power, and control functions are exposed through dedicated external connectors.
• Aperture and Scanning Envelope: The 16 × 24 aperture supports electronic steering of ±45° in azimuth and ±45° in pitch.

RF Interface and Input Drive Requirements

The RF interface defines the signal boundary between host transmission/reception hardware and the active antenna array:

• RF Interface: The RF interface uses an SMA connector for operation across the 15.2 GHz to 17 GHz band.
• Input Excitation Level: The array accepts an RF input excitation level of 22 dBm ± 1.5 dBm.
• Internal Distribution and Key Parameters: The internal power divider module distributes the input excitation across the 384 active channels. System integration requires accommodating the following electrical and physical interface specifications:

Parameter	Specification / Requirement
Operating Frequency Band	15.2 GHz – 17 GHz
RF Interface Connector	SMA connector
Input Excitation Level	22 dBm ± 1.5 dBm
Full-Array Peak Power	≥52 dBm
System EIRP (Normal)	≥81.5 dBm (room temperature)
DC Power Supply Voltage	DC 16 V – 40 V
Maximum Power Consumption	≤300 W (20% duty cycle, pulse width: 1 µs)
Prime Power Interface	J30J-4-pin high-current connector
Array Control Interface	J30J_15TJL connector
Mechanical Dimensions	315 mm × 315 mm × 39 mm (±0.2 mm)
Total Assembly Mass	≤4 kg

Power Bus Requirements and Pulsed Operation Constraints

The host power subsystem must accommodate the array’s specified DC input range and pulsed power demand:

• DC Power Supply Range (16 V – 40 V): The antenna accepts a DC input voltage of 16 V to 40 V.
• Prime Power Interface: DC power is delivered through a dedicated J30J-4-pin high-current connector.
• Power Consumption Limits: Total DC power consumption is specified at ≤300 W under a 20% operational duty cycle (pulse width: 1 µs).
• Operating Duty Cycle: The transmitter architecture supports operating duty cycles of up to 20%. The host power architecture should maintain the DC supply within the specified 16–40 V window under the specified operating conditions.

Control, Mechanical, and Thermal Interfaces

Platform integration requires matching the available installation space to the array’s physical, environmental, and thermal requirements:

• Control Interface: Array control is provided through a dedicated J30J_15TJL connector.
• Mechanical Envelope and Mass: The enclosure measures 315 mm × 315 mm × 39 mm (±0.2 mm) and has a total mass of ≤4 kg.
• Environmental Ratings: Operating temperatures range from -40 °C to +70 °C, with a storage rating of -50 °C to +70 °C.
• Thermal Management Requirements: System designers should implement appropriate thermal management at the installation interface to handle the thermal load associated with the stated power consumption (≤300 W at 20% duty cycle), maintaining the assembly within its specified operating temperature range.
• Surface Finish: The metal cavity features a bare or colored finish, while the radiating face is protected by a white primer coating.

System Integration FAQ

Q: What external RF distribution network is required to drive the 384-channel array?

A: The antenna incorporates an internal power divider module that distributes the specified RF excitation across the active channels. The host platform supplies the specified 22 dBm ± 1.5 dBm RF input excitation through the external RF interface.

Q: How should the platform power bus be configured for pulsed operation?

A: The platform power subsystem should provide the antenna with a DC input of 16 V to 40 V through the dedicated J30J-4-pin high-current connector. The host power subsystem should be sized to support the specified ≤300 W power demand at a 20% duty cycle (1 µs pulse width), while maintaining the array input voltage within the specified 16–40 V range during operation.

Q: What thermal considerations must be addressed during platform integration?

A: System designers should implement appropriate thermal management at the platform interface to manage the thermal load associated with operation at the specified power-consumption level (≤300 W at 20% duty cycle), keeping the antenna within its operational temperature range of -40 °C to +70 °C.