Anti-Jamming Antenna JM004

Overview

JM004 is an assured positioning solution that protects your systems from radio frequency interference and jamming. It combines an anti-jamming antenna array and a GNSS antenna element into a marine-hardened enclosure. It can mitigate intentional or unintentional interference and jamming effects, ensuring the GNSS receiver continues to operate correctly. With low power consumption (15W), lightweight (2kg), and compact dimensions (φ178*H56mm), this product is available for rapid deployment and ensures future compatibility, ideal for a wide range of marine vessels.

Key Features

Integrated Multi-Element Anti-Jamming Antenna

The Anti-Jamming Antenna JM004 features a 6-element B1L1E1 anti-jamming antenna array on the periphery and a full-band GNSS antenna element at its center. This product effectively handles complex environments with intentional and unintentional jamming, automatically switching between anti-jamming and non-anti-jamming modes.

Superior Anti-Jamming Capabilities

The antenna reduces the reception of non-line-of-sight signals by precisely controlling the beam direction, thus effectively mitigating the adverse effects of multipath interference.

Improved Out-of-Band Suppression

JM004 features a 10W burn-out resistant chip for durability and reliability in harsh environments. Its multi-stage pre-filters reduce out-of-band signals and prevent GNSS antenna saturation, ensuring stable performance in complex electromagnetic conditions.

Robust and Durable Structure

JM004’s integrated antenna design is IP67-rated for waterproof and dustproof protection, with a sealed structure for durability. Its reinforced plastic radome and aluminum alloy base ensure strong shock and vibration resistance, while an anti-corrosion coating supports long-term marine use. Built-in lightning and overvoltage protection enhance safety. It offers flexible mounting options, including surface and pole mounts.

Parameters

ANTENNA PERFORMANCE

Antenna Elements

6-Element B1L1E1 Anti-Jamming Antenna
Array + Full-Band GNSS Antenna Element
(GPS L1/L2/L5, BDS B1/B2/B3, Galileo
E1/E5/E6, GLONASS L1/L2/L3)

Isolation

Co-Frequency Unit Antenna≤-15dB

Peak Gain

4dBic

VSWR

≤2.0

Impedance

50Ω

Polarization

Central Element: Right-Hand Circular Polarization
Peripheral Elements: Linear Polarization

CIRCUIT PERFORMANCE

LNA Gain

3 Anti-Jamming Antenna Array: 20±1dB
GNSS Antenna Element: 40±2dB

VSWR

≤2.0

Out-of-Band Rejection

@50M≥40dB@1509M&@1629M

Noise Figure

≤2dB

Burnout Resistance

≥10W

SYSTEM PERFORMANCE

Operation Voltage

DC 9-40V

Operation Current

Each Channel less than 120mA

Power Consumption

Less than 15W

Number of Jamming Sources

Signal-to-Interference Ratio

Single Element≥105dB;
Triple Element≥95dB;
Sextuple Element≥85dB

MECHANICAL

Color

Grey-White

Dimensions

φ178*H56mm (Excluding connectors, accessories, and tolerances)

Weight

≤2kg (Including bracket)

Mounting

Screws Mount; 5/8＂ -11 Pole Mount

Connector

RF Signal: TNC-K; Power Supply + Signal Control: ZLN.2F.316.-CLL-2B Socket

Color

Black

Connector

TNC-K

ENVIRONMENTAL

Operating Temperature

-40°~+70°

Storage Temperature

-45°~+85°

Waterproof Rating

IP67

Salt Spray Test

Conducted for 28 days using neutral salt spray

Mechanical Shock Test

≤50g

Quality Level

Industrial Grade

Product Certification

RoHS

Localization Rate

100%

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