Electronic Surveillance Starts With Knowing Where Signals Come From
Alaris Antennas specialises in designing advanced antennas for electronic surveillance applications. Built to deliver exceptional performance in signal interception and monitoring, our antennas are engineered for precision, reliability, and adaptability in the most demanding environments.Whether for tactical field operations or strategic installations, our range includes high-sensitivity wideband solutions tailored to support modern Electronic Surveillance Measures (ESM). From compact designs to comprehensive systems for air, land, and sea, our antennas ensure seamless integration and optimal performance for your mission-critical needs.
What Our Antennas Enable
Alaris designs antennas that provide reliable angle-of-arrival (AoA) information across wide frequency ranges. Built for demanding EW, SIGINT, and electronic surveillance missions, our antennas deliver the accuracy, sensitivity, and ruggedness needed for real-world operations.
Accurate AoA
Measurement
Detect and classify RF emitters across broad bandwidths.
Emitter Location
& Tracking
High-integrity AoA measurements enable triangulation and real-time geolocation.
Spectrum Awareness in Complex Environments
Maintain visibility in dense, multipath-rich areas such as urban terrain.
Data-Driven Intelligence for Operational Decisions
Transform raw RF data into actionable intelligence with the precision and reliability critical operations demand.
Why Our Antennas Perform
Performance in electronic surveillance hinges on solving real-world RF challenges & not just theoretical specifications. Our antennas are engineered from the ground up to handle multipath interference, high e-fields, and platform integration constraints that compromise less robust designs. By combining broadband multi-element arrays with algorithmic flexibility and field-hardened construction, we deliver the measurement integrity and operational reliability that critical ESM missions demand.
Broadband, Multi-Element Arrays
Wide frequency coverage allows monitoring of multiple signal types and threat categories using a single antenna system.
Low SWaP Options for Tactical Use
Compact, ruggedized antennas for vehicles, man-portable systems, or rapid deployment, without compromising DF accuracy.
Designed for Real Environments
Our arrays are optimised for challenges such as multipath, high e-fields, and platform effects, ensuring dependable DF results in urban, tactical, or mobile deployments.
Algorithmic Compatibility
Supports all major DF processing methods (e.g., correlative algorithms), ensuring seamless integration into existing DF receivers and software platforms.
What this means for
Your
mission
Technical performance translates directly into operational advantage. Our antennas don't just detect signals, they accelerate decision-making, improve positional accuracy, and increase confidence in contested environments where misidentification or delayed intelligence can compromise mission success. Here's how precision-engineered ESM antennas impact your operations:
Faster and more confident threat identification
High-integrity AoA measurements and broadband coverage enable rapid signal classification and threat assessment. Spend less time analyzing, more time responding.
Reduced time to geolocate emitters
Maintain clear RF visibility in complex, multipath-rich environments. Our antennas deliver reliable performance whether you're operating in dense urban terrain or on the move.
Dependable performance in contested environments
Purpose-built for real-world challenges including multipath interference, polarization mismatch, and platform effects. Dependable results in contested, degraded environments.
Accurate bearing measurements environments
Accurate bearing measurements accelerate triangulation and enable faster emitter geolocation. Get actionable position data when timing is critical.
Fewer false bearings and misidentifications
High-quality phase coherence and calibrated array responses reduce measurement errors that lead to incorrect bearing data. Cleaner AoA information means higher confidence in emitter locations and fewer wasted resources chasing phantom signals.
Seamless integration into existing systems
Algorithm compatibility and standard interfaces mean faster deployment with your current DF receivers and software. Upgrade performance without replacing your entire infrastructure.
Featured products
DF-A0303
Compact 4-channel DF Antenna
The DF-A0303 is a tri band, compact DF antenna intended for manpack direction-finding on the move from 20 MHz to 8000 MHz. The antenna presents patterns suitable for 4-channel correlative DF (CDF). The DF-A0303 has a low noise amplifier on each channel with passive bypass capability, an integrated noise source or optional external signal can be used for downstream RF chain calibration and also includes a navigation and GPS.
- Frequency range
- 20 - 8000 MHz
- Frequency bands
- Band B: 20 - 500 MHz; Band C: 400 - 2000 MHz; Band D: 2000 - 8000 MHz
- Polarisation
- Vertical
- Nominal input impedance
- 50 Ω
- RF Amplification Gain
- 20 ± 2 dB
- Power supply
- 6 - 18 V DC
- Power consumption
- < 3 W
- Connector
- MIL-DTL-38999 multi-pin connector
- Mechanical
- Removable flange for vehicle or mast-mounting; Various sockets for tripod / gooseneck (1/4-20 UNC, 3/8-16 UNC, M10-6H, 3x M5-6H)
- Dimensions (d x h)
- See outline on brochure
- Total mass
- < 1.2 kg incl. bracket
- Wind survival
- 160 km/h (without ice)
- IP rating
- IP66
DF-A0062
Direction Finding and Monitoring Antenna
The DF-A0062 direction finding antenna covers a frequency range of 20 MHz to 6 GHz. A separate, but fully integrated active monitoring antenna gives high sensitivity omni-directional coverage on the same axis as the DF antenna, without interfering with the DF array. The full-size elements on all bands give excellent DF sensitivity. Ultimate angular resolution for strong signals is well under 1° for most of the frequency range. Dipole elements provide good cross-polarisation rejection, and fair performance for signals arriving from up to 15° above or below the horison. The integrated monitoring antenna is in two bands, mounted above the Band C & D DF antenna module housed in the radome. Each band of the monitoring array is amplified at the top of the cable, and passively combined to give continuous coverage over the frequency range 20 MHz to 6 GHz, with a single output connector. This DF antenna is designed to be usable with either a 5- or 2-channel phase-sensitive receiver and correlative algorithm. Characterisation of the antenna can be performed on request.
- Frequency range
- 20 - 6000 MHz
- Nominal H-plane beamwidth
- 360°
- Nominal E-plane beamwidth
- 60°
- Typical VSWR
- 2:1 typical
- Polarisation
- Vertical
- Connector type
- N-type male
- Nominal impedance
- 50 Ω
- Input voltage (via coax)
- 13 - 24 V DC
- Input current
- < 150 mA
- Power consumption (nom)
- < 2.25 W
- Assembled height
- 3.60 m
- Assembled diameter (max)
- 2.70 m
- Weight
- Antenna: 60 kg Incl shipping container: 135 kg
Products ideal for
Electronic Surveillance Applications
Browse by Application
Counter-UAS Solutions
Advanced detection, location, and jamming capabilities
Digital Broadcasting
High-Linearity Amplifiers for Critical Broadcasting
Electronic Attack
Defensive jamming against RF threats
Electronic Countermeasures
Designed to detect, locate, and neutralize hostile signals
Maritime Antenna Solutions
EW to high-power communication interception
Microwave Ablation
Precision Microwave Energy for Medical Therapy
Plasma Processing
Stable Power for Advanced Plasma Processing
Tactical Communications
Vehicle-to-dismount connectivity
Tactical Direction Finding
Secure communications under jamming and interferenceBrowse by Type
Block Up Converters (BUCs)
Unmatched performance in a compact, fanless design
Communication Antennas
Wide range of HF, VHF, UHF and SHF (L-, S- & C-band)
Direction Finding Antennas
Discover the power of accurate angles of arrival
Low Noise Amplifiers
High-power, low-distortion performance for critical comms.
Low Noise Block Down Converters
Precision RF energy for medical and industrial excellence.
Microwave Power Generators
Reliable satellite signal reception in the toughest environments.
Monitoring Antennas
Spectrum monitoring, signal reception & detection & ITU
Oscillators
Ultra-low phase noise oscillators with exceptional frequency stability
Power Amplifiers
Extract clarity from the faintest RF signals.
Steerable Beam Antennas (SBA)
Elevate Electronic Warfare and Counter-Drone / C-UAS applications
