All-in-One GNSS Denial Jammer — 50 W & 100 W Variants with 360° Omni Bubble Coverage
The K9 AWJ-JBM-GNSS is an all-in-one GNSS denial jammer covering every major satellite constellation across 1100–1650 MHz. Its 2 sub-band TDM architecture and non-stationary AWJ waveforms are engineered to stress CRPA adaptive nulling — placing all transmit power precisely where the satellite signals live, not spread thin across empty spectrum.
The K9 AWJ-JBM-GNSS is a defence-grade GNSS denial jammer available in 50 W (AWJ-JBM-GNSS-50) and 100 W (AWJ-JBM-GNSS-100) variants — both covering all major satellite navigation constellations including GPS, GLONASS, Galileo and BeiDou through a 2 sub-band TDM architecture.
The Lower L-band (1176–1268 MHz) covers GPS L2/L5, GLONASS G2, Galileo E5a/E5b and BeiDou B2/B3. The Upper L-band (1561–1606 MHz) covers GPS L1, Galileo E1, BeiDou B1 and GLONASS G1. Both sub-bands receive the full rated power sequentially.
Short TDM dwell (10–50 ms) adds frequency-domain non-stationarity on top of AWJ waveform non-stationarity — engineered to stress CRPA covariance-matrix estimation across the full receive band. Passively cooled, IP65 sealed, universal mount. The 50 W variant runs from 12/24 VDC; the 100 W variant from a 28 VDC nominal bus.
This GNSS denial jammer focuses all transmit energy inside the GNSS band — giving a power spectral density per GNSS MHz roughly four times that of a wideband module. No power is wasted on empty spectrum.
GNSS signals cluster naturally into two L-band groups. The AWJ-JBM-GNSS denies both through a 2 sub-band TDM cycle — each sub-band receiving the full rated power in sequence.
| Constellation | Band | Frequency | Signal Type |
|---|---|---|---|
| ✓GPS | L1 | 1575.42 MHz | C/A, P(Y), M, L1C |
| ✓GPS | L2 | 1227.60 MHz | P(Y), L2C, M |
| ✓GPS | L5 | 1176.45 MHz | L5 safety-of-life |
| ✓GLONASS | G1 | 1598–1606 MHz | L1OF, L1SF |
| ✓GLONASS | G2 | 1242–1249 MHz | L2OF, L2SF |
| ✓Galileo | E1 | 1575.42 MHz | OS, PRS, CS |
| ✓Galileo | E5a | 1176.45 MHz | OS |
| ✓Galileo | E5b | 1207.14 MHz | OS, CS |
| ✓BeiDou | B1 | 1561.10 MHz | B1I, B1C |
| ✓BeiDou | B2 | 1207.14 MHz | B2I, B2a |
| ✓BeiDou | B3 | 1268.52 MHz | B3I |
All 11 GNSS signals covered via 2 sub-band TDM · Lower 1176–1268 MHz · Upper 1561–1606 MHz · Full power per sub-band · 10–50 ms dwell
Time-division multiplexing across the two GNSS sub-bands adds a layer of frequency-domain non-stationarity on top of the AWJ waveform itself — engineered to be a harder problem for adaptive nulling than a stationary source.
GNSS signals cluster into two groups — Lower L-band (1176–1268 MHz: GPS L2/L5, GLONASS G2, Galileo E5a/E5b, BeiDou B2/B3) and Upper L-band (1561–1606 MHz: GPS L1, Galileo E1, BeiDou B1, GLONASS G1). Both receive the full rated power sequentially.
Short dwell (10–50 ms) cycles the interference spectrum between the two L-band clusters faster than a CRPA can re-estimate its covariance matrix. The algorithm faces waveform non-stationarity and frequency-domain non-stationarity at the same time.
Modern dual-frequency GNSS chipsets can fail over to an uncontested band during longer dwell periods. At 10–50 ms dwell the failover window is shorter than receiver acquisition time — maintaining denial against all-frequency receivers.
All rated power is focused within the GNSS band — power spectral density per GNSS MHz is roughly 4× that of a wideband module. The unoccupied spectrum between the clusters receives no power; all energy is placed precisely where GNSS signals exist.
Controlled Reception Pattern Antennas defeat conventional GNSS jammers by forming a stable null on a stationary interference source. The AWJ-JBM-GNSS denial jammer targets that assumption directly.
Conventional broadband GNSS jammers generate stationary noise — the exact scenario adaptive beamforming was optimised for. The CRPA algorithm forms a stable null on the stationary source, and higher power alone is unlikely to overcome it.
AWJ waveform profiles are designed to change statistical character faster than the algorithm's convergence time — preventing stable null formation. This is an architectural approach to interference rather than a power contest.
More antenna elements means a larger covariance matrix and more computation per update cycle. In theory, non-stationary AWJ waveforms may stress CRPA systems regardless of element count — though this varies by implementation.
| Parameter | AWJ-JBM-GNSS-50 | AWJ-JBM-GNSS-100 |
|---|---|---|
| RF Performance | ||
| RF Frequency Range | 1100 – 1650 MHz | 1100 – 1650 MHz |
| RF Output Power | 50 W (+47 dBm) | 100 W (+50 dBm) |
| Power Spectral Density | ≈ 91 mW/MHz | ≈ 182 mW/MHz |
| Sub-Bands (TDM) | Lower + Upper L-band | Lower + Upper L-band |
| Waveform Engine | K9 AWJ driver | K9 AWJ driver |
| Waveform Modes | CW / Swept / Random / TDM / Pulsed | CW / Swept / Random / TDM / Pulsed |
| TDM Dwell Time | 10 – 50 ms recommended | 10 – 50 ms recommended |
| Duty Cycle | 1 – 100% | 1 – 100% |
| Spurious & Harmonics | < –50 dBc | < –50 dBc |
| Antenna | ||
| Antenna Type | Compact L-band stub omni | Compact L-band stub omni |
| Coverage Pattern | 360° hemispheric bubble | 360° hemispheric bubble |
| Antenna Gain | 3 dBi | 3 dBi |
| Power | ||
| Power Supply | 12/24 VDC (10–32 V) | 28 VDC nominal |
| Power Consumption | 150 W typical | 300 W typical |
| Power Connector | Mil-spec circular, 4-pin | Mil-spec circular, 4-pin |
| Mechanical | ||
| Module Dimensions | 160 × 160 × 120 mm | 160 × 300 × 120 mm |
| Total Height | ≈ 250 mm inc. antenna | ≈ 400 mm inc. antenna |
| Module Weight | 2 kg typical | 3.5 kg typical |
| Interface | ||
| Status Indicators | 2 × LED — Power / RF Active | 2 × LED — Power / RF Active |
| Configuration | AWJ DMS v3.0 factory loaded | AWJ DMS v3.0 factory loaded |
Specifications subject to change without notice · Each unit factory-tested with acceptance report
This GNSS denial jammer projects a 360° azimuth, hemispheric bubble of denial energy from the integrated L-band stub antenna. There is no pointing or aiming — the protected asset sits inside a continuous volume of denial energy in every direction.
From vehicle-mounted convoy protection to permanent fixed-site perimeters — the AWJ-JBM-GNSS denial jammer defeats navigation-dependent threats across deployment formats.
Denies all major GNSS constellations via 2 sub-band TDM. Non-stationary AWJ waveforms combined with frequency-cycling TDM stress CRPA adaptive algorithms; short dwell prevents dual-frequency receiver failover.
Vehicle-mounted GNSS denial bubble. The compact ≈250 mm profile reduces snag risk in low-clearance environments. Runs directly from the 12/24 VDC vehicle bus.
Defeats GNSS-navigated delivery drones used to carry contraband over perimeter walls. Low-profile rooftop or mast mount, unattended 24/7 IP65-sealed operation.
Denies GPS timing and positioning signals used by GNSS-triggered IED systems. Focused L-band denial alongside cellular defeat from a companion AWJ-JBM-LB module.
Permanent GNSS denial perimeter for embassies, ministries and official residences. Continuous unattended operation; passive cooling with no maintenance intervals.
GNSS denial against reconnaissance and payload-delivery drone threats to data centres, power stations, refineries and water treatment facilities.
Both variants share the sealed aluminium architecture and military environmental envelope — the 100 W variant adds an extended heatsink body for its higher dissipation.
| Part Number | Description |
|---|---|
| AWJ-JBM-GNSS-50 | Bubble Module — all GNSS constellations, 50 W per sub-band (+47 dBm), integrated L-band stub antenna |
| AWJ-JBM-GNSS-100 | Bubble Module — all GNSS constellations, 100 W per sub-band (+50 dBm), integrated L-band stub antenna — 28 VDC nominal |
| AWJ-JBM-VMK | Vehicle Mounting Kit — universal flange + wiring harness |
| AWJ-JBM-HMK | Helicopter Mounting Kit — hardpoint adaptor |
| AWJ-JBM-PSU | 28 VDC PSU — required for 100 W variant. AWJ-JBM-PSU-50 24 VDC for 50 W fixed-site |
Looking for a GNSS denial jammer configured to your operational requirements? Tell our engineering team the constellations and platform you need to protect, and whether 50 W or 100 W suits your deployment. We will respond with a band plan, a configured part number and, where appropriate, an NDA for further technical engagement.