In radar target tracking and directional communications, receive-aperture sensitivity and angular discrimination are critical determinants of tracking range and angle-measurement accuracy. Operating across the 15 GHz to 17 GHz band, the Ku-Band 1024-Channel Two-Dimensional Phased Array Antenna integrates 1024 active channels, the antenna structure, TR modules with receive-path amplification and compensation circuitry, an internal power divider, and differential beam-forming networks into an integrated mechanical housing measuring 420 mm × 400 mm × 129 mm with a total mass of ≤17 kg, delivering a reception gain of ≥32 dB and an unweighted G/T of ≥4.5 dB/K at room temperature.
Aperture-Level Reception: Full 32 × 32 Active Matrix Architecture
The receive architecture uses a fully populated planar array for full-aperture signal collection and spatial beam synthesis:
Technical Specs & Engineering Support
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- Full 32 × 32 Active Collecting Area: Incident spatial electromagnetic waves are captured across an untruncated coordinate grid of Nx = 32 in azimuth and Ny = 32 in pitch, utilizing all 1024 active antenna elements without corner truncation.
- Per-Channel Receive Conditioning: Received signals undergo low-noise amplification along with independent phase and amplitude compensation directly within each TR channel module prior to spatial beam synthesis.
- Integrated Sum/Difference Processing: Dedicated internal sum/difference networks combine the conditioned receive signals into sum (Σ) and difference (Δ) outputs within the antenna enclosure for angular error signal extraction.
- Polarization Baseline: Vertical polarization serves as the typical baseline configuration across the receiving aperture.
Receiver Sensitivity: Unweighted G/T and Reception Gain
The receive performance is characterized by the specified reception gain and G/T performance across the operating bandwidth:
- Reception Gain: The antenna provides a reception gain of ≥32 dB across the 15 GHz to 17 GHz operating frequency band under factory test conditions.
- Unweighted System Figure of Merit (G/T): The array specifies an unweighted G/T of ≥4.5 dB/K at room temperature, establishing a defined baseline for receiver sensitivity.
- Bandwidth Consistency: Both reception gain and G/T performance specifications apply across the entire 15 GHz to 17 GHz operating band.
Integrated Sum/Difference Networks for Dual-Axis Monopulse Tracking
Monopulse angle measurement requires simultaneous formation of sum and difference beams across orthogonal tracking planes:
- Integrated Sum/Difference Processing: Dedicated sum and difference beamforming circuitry is integrated within the antenna assembly, reducing the need for external RF hybrid combiners.
- Angular Error Signal Extraction: The network produces simultaneous sum (Σ), azimuth difference (ΔAz), and pitch difference (ΔEl) signals to support monopulse angle-tracking loops.
- Dedicated Difference Interfaces: The front-end provides dedicated SSMP-J RF ports specifically assigned to azimuth and pitch difference outputs.
- Dual-Axis Beam Steering: Electronic scanning covers ±45° in azimuth and ±45° in pitch, with a typical beam-pointing error of ≤0.2° throughout the specified ±45° azimuth and ±45° pitch scan range.
- Tracking Command Interface: Beam coordination and steering updates route through the dedicated J30J_15TJL control connector.
Platform Integration and Operational Constraints for Tracking Systems
The physical, electrical, and thermal parameters of the 1024-channel array define clear integration boundaries for platform tracking installations:
- Angular Tracking Application Suitability: The combination of a full 32 × 32 aperture, ±45°/±45° electronic scan, ≤0.2° typical pointing error, and internal sum/difference outputs supports integration into monopulse tracking systems.
- Mechanical Installation Envelope: The unit measures 420 mm × 400 mm × 129 mm (including rear compartment mechanical components), requiring mounting structures dimensioned to support a total assembly mass of up to 17 kg (excluding the external variable-frequency synthesizer and digital signal processor).
- Operating and Storage Thermal Window: The assembly operates across an ambient temperature range of -40 °C to +70 °C, with a storage temperature tolerance of -50 °C to +70 °C.
- Prime DC Power Interface: Internal electronics operate from an 18 V to 36 V DC bus supplied through a dedicated J30J 4-pin high-current connector, with maximum power consumption specified at ≤1300 W at a 25% transmission duty cycle.
Frequently Asked Questions (Reception & Tracking Performance)
Q: How does the full 32 × 32 matrix aperture affect reception sensitivity?
A: By populating all 1024 active elements across the 32 × 32 grid without removing corner sub-arrays, this geometry preserves the complete physical collecting aperture, with a specified reception gain of ≥32 dB and an unweighted G/T of ≥4.5 dB/K at room temperature under factory test conditions.
Q: How does the integrated sum/difference network deliver signals for monopulse tracking?
A: Internal sum/difference networks combine the conditioned signals from individual TR modules directly within the antenna housing to form simultaneous sum (Σ) and orthogonal difference (Δ) beams. Dedicated SSMP-J difference ports route azimuth and pitch difference signals directly to platform receivers, reducing the need for external RF hybrid combiners while maintaining a typical beam-pointing error of ≤0.2°.
Q: What interfaces handle monopulse tracking coordination and prime DC power?
A: Beam-pointing coordinates, synchronization signals, and tracking commands are received via the dedicated J30J_15TJL control connector. Prime power is supplied independently via a dedicated J30J 4-pin high-current connector operating from an unregulated 18 V to 36 V DC bus (≤1300 W at a 25% duty cycle).