Surface Ships Naval Antennas
Naval defense communications antennas
Surface Ships Naval Antennas
Naval defense communications antennas
ALSEAMAR is experienced in the design, simulation, manufacture, and characterization of naval defence antennas including a wide product line of:
- Active and passive antennas covering different frequencies: VLF / LF, HF, V / UHF, UHF;
- High performance multi-couplers for Input/Output signal routing.
These antennas and multicouplers make it possible to create a complete surface ship antenna subsystem.
The antennas produced by ALSEAMAR build in the strictest RCS (Radar Cross Section) reduction requirements.
For many years, our antennas have been installed on main surface ship programs: French navy - FLF Lafayette, Charles de Gaulle, BPC, Fremm and for export – Sigma corvettes, Sawari, Oman OPV, Delta…
UHF Antennas – RCS reduced
AS 273
UHF 225 MHz –1.3 GHz antenna
AS 273 is a broadband end-fed dipole.
Specifications
225 – 1300 MHz
Typ. ≤ 2.2
0 dBd
Vertical
Omnidirectional
300 W (225-500 MHz)
Applications
- Defence communication system.
Technical characteristics
- Vertical polarisation
- Omnidirectional
- Low Radar Cross Section
- Epoxy glass fibre
- Corrosion free
- Shock & Vibration resistant
- Electrical Direct grounding
Versions
- AS 273-2 – including dielectric mast
- AS 273-3 – flange mounting
AS 307-B
UHF half wave dipole 225-400 MHz
AS 307 is a broadband end-fed dipole
Specifications
225 – 400 MHz
Typ. ≤ 2.2
0 dbd
Vertical
Omnidirectional
300 W (225-500 MHz)
Applications
- Communication defence system
- In service in many navies
TECHNICAL CHARACTERISTICS
- Vertical polarisation
- Omnidirectional
- Low Radar Cross Section
- Epoxy glass fibre
- Corrosion free
- Shock & Vibration resistant
- Easy mounting
- Electrical Direct grounding
AS 329-1A
UHF multisource omnidirectional antenna 225-400 MHz
AS 329-1A is able to fit a mast up to 650 mm in diameter while maintaining an omnidirectional pattern. The shape of the antenna uses only flat surface for a maximum RCS reduction.
Specifications
225 - 400 MHz
Typ. ≤ 2.2
0 dBd
500 W
Omnidirectional (± 2 dB)
Applications
- Defence communication system. In service in many navies.
TECHNICAL CHARACTERISTICS
- Vertical polarisation
- Omnidirectional
- Low radar cross section
- Corrosion protected aluminium
- Shock & Vibration resistant
- Maintenance free (no nitrogen pressurisation)
- Electrical direct grounding
Tx and Rx Couplers
AM 326
225-400 MHz Tx coupling unit
AM 326 is used to connect 4 UHF transmitters to 1 antenna while maintaining full simultaneity
Specifications
225 - 400 MHz
≤ 2
N (connectors)
4 × 100 W CW and PEP
≥ 40 dB
1 > 1: –1 dB
2 > 1: –4.5 dB
4 > 1: –7.5 dB
110 V / 220 V AC
Applications
- Defence communication system. In service in many navies.
TECHNICAL CHARACTERISTICS
- Frequency range: 225-400 MHz
- Passive coupling
- Fixed frequency and frequency hopping compliant
- Tx 1, 2 or 4 inputs selection
- Remote control through Ethernet SNMP
- 2U in a standard 19”
ASSOCIATED EQUIPMENTS
- UHF: Antenna AS 329-1a, AS 307-B, AS 262/2A
- UHF: Rx coupling unit AM 346
AM 346
225-400 MHz Rx coupling unit
AM 346 is used to connect 1 antenna up to 12 UHF receivers
Specifications
225 - 400 MHz
N
BNC
+ 20 dBm
≥ 20 dB
2.5 dB
110 V / 220V AC
≥ 40 dB
≤ 7.5 dB
Applications
- Defence communication system. In service in many navies.
TECHNICAL CHARACTERISTICS
- Frequency range: 225-400 MHz
- High dynamics active coupler
- Fixed frequency and frequency hopping compliant
- 1 monitoring output
- High linearity and 6 dB attenuation configurations
- Remote control through Ethernet SNMP
- 2U in a standard 19”
Passive HF Antennas
ASV 615
VLF/LF/MF/HF Rx passive antenna
ASV 615 is a glass fibre passive whip – Tx 1,5 - 30 MHz (with tuning unit) – Rx 10 kHz - 30 MHz
Specifications
10 kHz – 30 MHz
1,5 MHz – 30 MHz (with Tuning unit)
100 W
Applications
- Surface ships In service in French and foreign navies
TECHNICAL CHARACTERISTICS
- One part antenna
- Epoxy glass fibre
- Corrosion free
- Shock & Vibration resistant
- Feeding point located above the deck for enhanced, insulation and reduced parasitic capacities
- High reliability
- More than 1000 ASV antennas sailing around the world
AS 322 S/H – AS 322 S/T
VLF/LF/MF/HF Rx/Tx passive antenna
AS 322 is a glass fibre passive whip – Tx 1.5 – 30 MHz (with tuning unit) – Rx 10 kHz – 30 MHz
Specifications
10 kHz – 30 MHz
1.5 MHz – 30 MHz (with Tuning unit)
1 kW CW / PEP
Applications
- Defence communication systems. In service in many navies
TECHNICAL CHARACTERISTICS
- Two parts antenna
- Epoxy glass fibre
- Naval brass metallic parts,
- Corrosion free
- Shock & Vibration resistant
- High reliability
VERSIONS
- AS322 S/H: Above mounting plane
- AS322 S/T: Beneath mounting plane
AS 377
VLF/LF/MF/HF Rx/Tx passive antenna
AS377 is a glass fibre passive whip – Tx 1.5 - 30 MHz (with tuning unit) – Rx 10 kHz - 30 MHz
Specifications
10 kHz – 30 MHz
1.5 MHz – 30 MHz (with Tuning unit)
1 kW CW / PEP
Applications
- Surface ships (Defence communication systems)
TECHNICAL CHARACTERISTICS
- One part antenna
- Epoxy glass fibre
- Naval brass metallic parts
- Corrosion free
- Shock & Vibration resistant
- High reliability
- Feeding point: Above mounting plane
- Lightning capability
MIDS/JTIDS Antennas
AS 338
960-1215 MHz MIDS/JTIDS - Nato L16 antenna
Multisource antenna featuring omnidirectional radiation pattern with mid mast mounting capability (up to ø 500 mm) and low RCS
Specifications
300 W / 20% duty cycle (standard version)
1 500 W / 20% duty cycle (high power)
Typ. ≤ 2.2
50 Ω
Omnidirectional ± 2 dB
High power 7/16 “ (1 500 W)
–40 °C / + 55°C
Applications
- Surface ships (Defence communication systems)
TECHNICAL CHARACTERISTICS
- Tx/Rx antenna
- Vertical polarisation
- Radiation
- Pattern: omnidirectional
- Material: Glass fibre / epoxy
- Shock & Vibration resistant
Active HF Antennas
ACT 291-4
VLF/LF/MF/HF Active Antenna
A very high performance, low profile antenna featuring high field strength resistance and high dynamics while maintaining low noise figure
Specifications
10 kHz – 30 MHz (70 MHz)
≤ 1.7
50 Ohms (N female connector)
16 dB/m
48 V DC / 400 mA
+36 dBm
2 MHz: 3µV/m
30 MHz: 2µV/m
+45 / +48 dBm
60 V/m / 3 MHz
40 V/m / 30 MHz
+25°C : 380 000 H
+55°C : 246 000 H
Applications
- Surface ships / Embassy/ Receiving system for high constraints
TECHNICAL CHARACTERISTICS
- Low profile (650 mm height)
- Omnidirectional
- Vertical polarisation
- High sensitivity
- High dynamics
- High field strength capability
- Protected against nearby lightning
- Shock and vibrations proof
- DC supply through coaxial cable
- Corrosion protected aluminium housing-composite rod
AL 368
Active Antenna Power Supply
115 / 220 V power supply compatible with all ALSEAMAR’s 48 V DC active antennas
Specifications
10 kHz – 30 MHz (100 MHz)
50 Ω (N female connector)
115 V (for AL368-1) 50/60Hz
220 V (for AL368-2) 50/60Hz
IEC connector
48 V DC / 500 mA Maxi
180 000 h
AL368-1 for 115V supply
AL368-2 for 220V supply
TECHNICAL CHARACTERISTICS
- Wall mounting
- Antenna DC supply through coaxial cable
- Status leds
Applications
- Communications antennas
- Naval defense and marine environment applications
- Wide antenna product line covering from VLF to UHF with associated multicouplers
- Optimal active and passive antenna specifications
- Both transmission and reception capabilities
