1. Summary

This document specifies the product specification requirements for the Dual- Quadrant Array Navigation Anti-Jamming Antenna (hereinafter referred to as the "Anti- Jamming Antenna"). The antenna consists primarily of an array antenna, an anti-jamming processing module, a built-in receiver, and supporting cables. It supports receiving, amplifying, down-converting, filtering, anti-jamming processing, and up-converting signals across four channels in the BDS_B1, Galileo E1, and GPS L1+L5 frequency bands. The built-in receiver provides PVT solution outputs, operates within a power supply range of DC 12 V to 36 V, and offers suppression capabilities against various types of interference including broadband, narrowband, pulse, and frequency scanning signals.

2. Product Configuration

Table 2-1 Product Configuration (Single Set)

Drawing of Anti-interference Antenna Product

(Aerial Installation Dia- gram)

(Face-mounted installa- tion diagram)

Figure 2-1 Product Diagram of the Anti-Interference Antenna

(Aerial Installation Dimension Diagram)

(Face-Mounted Installation Dimension Diagram)

Figure 2-2 Dimension Diagram of the Anti-Interference Antenna (unit: Mm)

3. Size of Product

3.1 Major Function

1）Supports receiving signals at the B1/L1/E1+L5 frequency bands.

2）It supports resistance to various types of interference within the B1/L1/E1+L5 frequency band, including broadband, narrowband, sweep-frequency, pulse interference, and combinations thereof.

3）Built-in receiver that outputs positioning results processed for interference suppression.

4）Supports radio frequency output after anti-interference processing.

3.2 The Key Technical Indexes

1）Frequency Band Interference Resistance Capability

（1）Number of channels: 4 channels, supporting B1/L1/E1 + L5 frequency bands.

（2）Interference-resistant type: Capable of withstanding various types of suppress- ion interference including broadband, frequency scanning, and pulse interfer- ence, operating within the frequency range of B1/L1/E1 + L5, and resistant to combinations of these interferences.

（3）Number of anti-interference sources: 1 to 3 interference sources in different directions;

（4）Anti-monochromatic broadband interference capability: Signal-to-interference ratio (SIR) ≥ 105 dB at-130 dBm;

（5）Anti-triple-frequency broadband interference capability: Signal-to-interference ratio ≥

90 dB at-130 dBm;

（6）Anti-interference range: azimuth angle 0°-360°, elevation angle -10°-90° .

Note: The elevation angle is defined as the angle between the spatial vector of the anti-jamming unit and the horizontal plane, with the y-axis of the aircraft coordinate system serving as the pitch axis, where counterclockwise direction denotes "+" and clockwise direction denotes "-".

2) Radio Frequency Output

（1）Radio frequency output power: -55 dBm to-70 dBm;

（2）Radio frequency impedance: 50 ohms;

（3）Output standing wave ratio: ≤2.0.

3) Built-in Receiver Specifications

The built-in receiver supports receiving and parsing signals at the B1/L1/E1+L5 frequency points, and outputs positioning results via a data interface.

:

（1）Horizontal position accuracy ≤ 7 meters; vertical position accuracy ≤ 9 meters (95% confidence level, PDOP) ≤ 4).

（2）Speed measurement accuracy: ≤0.2 m/s (95%).

4）Antenna Port Burn Resistance: ≥10 W.

5) Operating Voltage Range: DC 12 V to 36 V.

6）Average Power Consumption: ≤14 W.

3.3 External Interfaces

This antenna has two external interfaces:

1）One J30J power data interface for power supply and data debugging.

This interface uses a J30J-9ZK connector with 9 pins, with signal definitions as follows.

Table 3-1 Power Data Interface Definition Table (LVTTL 3.3 V)

2）One SMA-K RF output interface for transmitting B1/L1/E1+L5 frequency band signals after antenna amplification and anti-interference processing. The specifications of the RF signal output interface are listed in the table below:

Table 3-3 Definition Table of Radio Frequency Signal Output Interfaces

3.4 Architectural Design

1) Dimensions: Length × Width × Height: 100 mm × 100 mm × 24.5 mm (±0.5 mm)

2）The main body of the product features a natural aluminum color with conductive oxidation treatment, while the antenna cover is silver-gray.

3）Product weight: ≤400 grams

4）Installation interface: As shown in Figure 2-2, the antenna side features eight M3 mounting screw holes.

3.5 Environmental Suitability

1）Operating temperature: -40°C to +70°C; relative humidity: 10% to 90% (no condensation);

2）Storage environment: -45°C to +85°C, 10% to 95% RH (no condensation);

3）Water resistance rating: No less than IP65.

3.6 Impact and Vibration

Impact Test: Conducted in accordance with ISO 19453-3:2018 "Environmental test methods for civil small and light unmanned aerial vehicle systems - Part 3: Impact test".

Vibration testing: Conducted in accordance with ISO 5309:2023 "Methods for vibration testing of small and light civil unmanned aerial system".

4. Installation Instructions

4.1 Installation Schematic

(Overhead Installation Method) (Face-mounted installation method)

Figure 3-1 Schematic Diagram of Interference-Resistant Antenna Structure Installation

1）Check the antenna assembly: main body, bracket, connection cable (J30J), and screws.

2）Brace installation: Use M3×6 screws to install the brace onto the antenna body in the desired direction.

Note: The bracket configured for this product supports two installation methods: when the long side is mounted on the antenna body, it constitutes an overhead installation; when the short side is mounted on the antenna body, it constitutes a surface-mounted installation.

3）Main Installation: Use M3×8 screws to secure the antenna with its bracket onto the platform, ensuring all screws are tightened for optimal shock resistance.

4.2 Installation Notes

1）The bottom surface of the anti-interference antenna is a metal heat-dissipating surface. During installation, ensure that the bottom surface provides adequate heat dissipation. It is recommended to position the bottom surface properly during installation.

It can be tightly fitted against other metal surfaces for better heat dissipation, or installed in an elevated position to ensure adequate airflow at the bottom.

2）The top surface of the anti-interference antenna constitutes the GNSS signal reception plane. To ensure optimal GNSS signal reception, when installing the anti-interference antenna on the carrier, its top surface must be directly oriented toward the open sky with no obstructions.

3）When the anti-interference antenna is installed inside the carrier, the surface of the carrier corresponding to its top surface must be made of a wave-transparent material with a transmission rate of no less than 92% in the L-band.