1. Summary

This document specifies the product specification requirements for the Dual Eight-Element 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 eight channels in the BDS_B1, Galileo E1, and GPS L1+L 5 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 across channels 1 through 7.

2. Product Configuration

Table 2-1 Product Configuration (Single Set)

Drawing of Anti-interference Antenna Product

(Aerial Installation Diagram) (Face-mounted installation diagram)

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

(Aerial Installation Dimension Diagram) (Surface-Mounted Installation Dimension Diagram)

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

3. Size of Product

3.1 Main Functions

1）Supports 8-channel signal reception at the B1/L1/E1+L5 frequency bands;

2）Supports resistance to various interference types—including broadband, narrowband, sweep, pulse, and their combinations—at the B1/L1/E1+L5 frequency bands.

3）Built-in receiver that outputs positioning results after anti-interference processing;

4）Supports RF output after anti-interference processing.

3.2 Main Technical Specifications

1）Frequency Band Interference Resistance Capability

（1）Number of channels: 8 channels, supporting B1/L1/E1+L5 frequency bands

（2）Capable of resisting various types of interference suppression in the B1/L1/E1+L5 frequency bands, including broadband interference, frequency scanning, and pulse interference, as well as combinations thereof;

（3）Number of anti-interference sources: 1 to 7 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 (SIR) ≥

95 dB at-130 dBm;

（6）Excellent resistance to seven major broadband interference sources: Signal-to-interference ratio ≥80 dB at-130 dBm.

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 in the B1/L1/E1+L5 frequency bands, 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: ≤35 W.

3.3 External Interfaces

This antenna has two external interfaces:

1）One J30J power data interface for power and data debugging. This interface uses a J30J-15ZK connector with 15 pins, whose signal definitions are as follows:

Table 3-2 Power Data Interface Definition Table (TTL 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: 160 mm × 160 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: ≤1000 grams

4) Installation interface: As shown in Figure 2-2, the antenna side features 8 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 Diagram(Overhead Installation Method) (Post)

(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, connecting cable (J30J cable), 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 proper heat dissipation on the bottom surface. It is recommended to fit the bottom surface tightly against another metal surface for optimal heat dissipation; alternatively, use an elevated mounting method to ensure adequate air circulation at the base.

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 portion of the carrier corresponding to the antenna's top surface must be made of a wave-transmitting material with a transmission rate of no less than 92% in the L-band.