What You Get
The BNTDF8BAJ dual-band eight-channel anti-jamming antenna is an RF processor built for GNSS receivers that must stay locked under deliberate or accidental interference. It accepts eight input channels, runs spatial nulling in real time, and delivers one cleaned output. The board targets UAVs, ground robots, and compact navigation systems where rack-sized gear cannot fit. Low cost, small size, and light weight define the design.
Channel Flexibility
This dual-band eight-channel anti-jamming antenna processor supports two working configurations. You can run it as a single-band eight-element array for deeper nulling against more jammers. Or switch to a dual-band four-element setup that protects two frequency bands simultaneously. That flexibility lets one hardware platform cover different mission profiles without swapping modules.
Frequency Modes at a Glance
Supported bands cover BDS-B1, BDS-B3, GPS-L1, GPS-L2, GLONASS-L1, and Galileo-E1. Processing frequency and bandwidth are dynamically configurable, so the same board can be tuned for regional or global constellations. Whether your receiver relies on BDS B3 or GPS L1/L2, the unit adjusts through software without changing the RF chain.
Nulling Depth and Jamming Types
The BNTDF8BAJ dual-band eight-channel anti-jamming antenna suppresses broadband, narrowband, swept, pulsed, and combined suppression-style jammers. In single-jammer tests, rejection exceeds 110 dB. With three jammers, the processor still holds above 95 dB. When configured for seven simultaneous threats, nulling depth stays at 80 dB or better. The number of jammers it can cancel depends on the array mode: three in dual-band four-element mode, seven in single-band eight-element mode.
Power, Data, and Control
The board runs on 9–36 VDC and draws 16 W typical. Data output uses RS422 or UART at LVTTL levels through the JL126-2-12ZJW connector. One GPI and one GPO pin allow external blanking or status indication. The single RF output delivers a processed signal between -70 and -40 dBm, which suits most GNSS receiver inputs without external pads. Input AGC handles up to +10 dBm per channel.
Compact Build for Drones
Weighing 96 g and measuring 90×60×11±0.5 mm, this dual-band eight-channel anti-jamming antenna processor fits inside payload bays and small enclosures. Four Φ2.2 mm mounting holes keep installation simple. The low-profile design stacks with receivers or embeds directly into custom housings. That small footprint matters when every gram and millimeter counts on a battery-powered drone.
Why It Excels in Tough RF
Most lightweight anti-jam units sacrifice either channel count or frequency coverage. This dual-band eight-channel anti-jamming antenna processor keeps both. You get eight RF channels, dynamic band selection, and up to seven-jammer nulling in one board. External sources like GPS.gov explain common jamming threats.
Integration Pointers
Keep all RF input cables matched in length and phase for accurate spatial nulling. Mount the board away from switching regulators and high-current paths. Apply 9–36 VDC to pin 2 or 8, ground pin 1 or 7, and confirm RS422 or UART output before flight. When switching between single-band and dual-band modes, recalibrate the array to maintain rejection depth.
Connector Pinout
