Naval Monitoring Products (OMNI-A0205 & SYST-A0005)

Alaris Antennas manufactures Naval rated monitoring antennas. There are two approaches: Omni directional (OMNI-A0205) vs rotating high gain directional antennas (SYST-A0005).

OMNI-A0205:

This vertically polarised omni-directional antenna consists of an active antenna array, covering 20 to 6000 MHz. The antennas are combined under 1 compact radome and output in either a single (OMNI-A0205-01) or two connectors (OMNI-A0205-02). The active part of the antenna protects the system from excessive field strengths and boosts low level signals.

The active version of this antenna relies on DC power injection on the output port of the antenna. The antenna is best utilised with the MISC-A0022 power supply for this purpose. The OMNI-A0205-01 features a passive-bypass mode which is engaged when the antenna is not powered. In this mode, the antenna is completely passive, allowing for low distortion measurements in the presence of high incident fields.

Based on the OMNI-A0098, the antenna is mechanically hardened to withstand the harsh environments experienced in maritime applications.

SYST-A0005:

The SYST-A0005 is a shipborne rotatable antenna system used for wideband detection and monitoring of communication signals. It consists of two LPDA antennas fitted to a single vertical mast, mounted on a rotator. The rotator can be aimed at all angles and is controlled via software.

The LPDA-A0083 is a large LPDA for 30 to 1000 MHz and is mounted on top of the mast. The LPDA-A0084 is a small LPDA mounted at the base of the mast. The SYST-A0005 features low-loss internal cables, a rotary joint for unlimited continuous rotation and a protected cable exit system.

It is designed for shipboard use above deck and has been tested to withstand a 200 km/h wind speed. All components are stainless steel and aluminium for complete protection from salt. The antenna has ample power capability for immunity from nearby communications and jamming. The mast has an integrated fold-away hoisting boom to facilitate installation with a crane.

For more information, contact sales@alaris.co.za.

Cojot Product Spotlight: High Gain GSM/3G/LTE Antennas

COJOT offers a range of high gain GSM/3G/LTE antennas for communication and jamming applications, in both manpack and vehicle versions:

HD827Q High Gain GSM/3G/LTE Manpack Antenna
The HD827Q is a high gain dual-band manpack antenna covering the GSM and 3G bands. The antenna is particularly suited for portable communication and jamming applications. Its centre-fed design minimises interference of the human body on the radiation performance of the antenna.

This antenna comes in the following variants:

  • HD827Q – includes steel spring
  • HD827RQ – includes rubber spring
  • ​HD827 – no spring

 

 

 

HD827XQ High Gain GSM/3G/LTE Manpack Antenna
The HD827XQ is a high gain omni antenna covering the GSM, 3G and 4G LTE bands. The antenna is particularly suited for high power jamming applications.

 

HD827M High Gain GSM/3G/LTE Vehicle Antenna
The HD827M is a high gain omni antenna covering the GSM, 3G and 4G LTE bands. The antenna is particularly suited for communication and jamming applications.

 

 

 

 

 

HD827XM High Gain GSM/3G/LTE Vehicle Antenna
The HD827XM is a high gain omni antenna covering the GSM, 3G and 4G LTE bands. The antenna is particularly suited for high power jamming applications.

 

 

 

 

For more information, contact contact@cojot.com, or visit www.cojot.com.

Marine

Marine DF & Monitoring System (DF-A0037 & OMNI-A0205)

The DF-A0037 and the OMNI-A0205 can be combined to create a Marine rated rugged DF and Monitoring system.

DF-A0037:

The DF-A0037 is a wideband DF antenna suitable for rugged marine environments. Based on the more portable DF-A0029 product, the rugged version features upgraded mechanical and environmental features to improve performance when mounted on a vehicle.

The antenna has a loop array for good DF performance at low frequencies where the phase size of the array is small, and two pentagonal arrays for the middle and high frequency ranges. Secondary pentagonal arrays of dipoles and monopoles provide good omni-directional antennas up to 3.6 GHz when appropriately combined. A HF whip on top of the antenna provides a sensitive omni output for this band.

OMNI-A0205:

This vertically polarised omni-directional antenna consists of an active antenna array, covering 20 to 6000 MHz. The antennas are combined under 1 compact radome and output in either a single (OMNI-A0205-01) or two connectors (OMNI-A0205-02). The active part of the antenna protects the system from excessive field strengths and boosts low level signals.

The active version of this antenna relies on DC power injection on the output port of the antenna. The antenna is best utilised with the MISC-A0022 power supply for this purpose. The OMNI-A0205-01 features a passive-bypass mode which is engaged when the antenna is not powered. In this mode, the antenna is completely passive, allowing for low distortion measurements in the presence of high incident fields.

Based on the OMNI-A0098, the antenna is mechanically hardened to withstand the harsh environments experienced in maritime environments.

For more information, contact sales@alaris.co.za.

Alaris is at LAAD 2019

The LAAD Defence & Security International Defence and Security Exhibition is a key meeting point for militaries, police forces, authorities and professionals of defence and security, and the leading Latin America Defence and Security event.

LAAD is supported by the Brazilian Ministry of Defence, the Military Forces, the Brazilian Ministry of Justice and Brazil’s Public Security’s structure.

The event gathers international and national companies that provide technologies, equipment and services for the Armed Forces, Special Forces, Police Forces, Homeland Security and also security managers from large companies, service concessionaires and critical infrastructure.

Alaris Antennas is currently exhibiting at this event as part of the South African National Pavilion. Our representative is waiting to meet you there.

Counter-RCIED Manpack

Cojot Product Spotlight: Counter-RCIED Manpack Antennas

480 – 2800 MHz Manpack Dipole Antenna

The WD528Q is a compact Counter-RCIED manpack antenna that provides ideal performance over the entire frequency band. The antenna comes with a steel shock absorption spring by default, but is also optionally available with a flexible gooseneck, lightweight rubber spring or without a spring.

  • Excellent performance over the entire 480 – 2800 MHz frequency range
  • Low weight and small visual signature
  • Rugged antenna construction with shock absorption spring

25 – 512 MHz Manpack Dipole Antenna

The WB25512R is a high performance manpack antenna for use in portable communications and jamming applications within the complete 25 – 512 MHz frequency range.

  • Adequate horizontal radiation performance over the complete frequency range
  • Foldable radiator for handy transportation and easy installation
  • Rugged antenna construction with shock absorption spring

25 – 175 MHz Manpack Dipole Antenna

The WB25175C is a high performance manpack antenna which is particularly suited for portable radio and jamming applications in the 25 – 175 MHz frequency range.

  • Rugged antenna construction with shock absorption spring and  lightweight carbon fibre whip or robust aluminium / steel whip
  • High power, 20 W at 100% duty-cycle
  • Foldable radiator for handy transportation and easy installation

For more information, email contact@cojot.com, or visit www.cojot.com

Alaris Antennas is now fully RoHS Compliant

Alaris Antennas can now manufacture fully RoHS compliant products as of the end of December 2018.

All leaded solder has been replaced by lead-free solder and during December 2018 an internal audit was done to ensure all had been removed.

Lead solder will be exclusively used when we work on products which were previously manufactured with lead or in accordance with customer specific requirements. This work will be done in a secure area.

The chromium-6 Alodine treatment has been replaced by a RoHS compliant conversion coating process some months ago. All ex-stock parts will be stripped and coated in accordance with the updated processes, on a per use basis.

Paints which had non-compliant chemicals were replaced with RoHS compliant equivalents. The basecoats were tested for adherence, and we selected a compliant basecoat which provided the best adhesion and performance.

Alaris Antennas can now provide (upon request) with every product delivery, an accurate REACH statement.

RoHS and REACH requirements are communicated to the suppliers as well Conformance certificates obtained where possible.

The above encapsulates the major changes implemented for RoHS and REACH compliance.

Kindly note that the adherence to the above statement is monitored by the QA department and will also form part of the annual quality audit cycle.

For further information, please enquire here.

Alaris does it’s part for the animals

During December, the staff at Alaris decided to round of the year with a community project by supporting the SPCA in Centurion.

Whilst everybody was looking forward to a well-deserved break in December, we were reminded by the reality that it is not always the best time of the year for our 4-legged friends.  Some animals are very fortunate to travel with their families, but just like humans, there are a lot of animals who live in terrible conditions during this time ….  In addition, some caretakers need to remain with the animals to take care of them, often with a concern of having enough food for the animals.

Alaris employees therefore decided to take action and to relieve some of the stress for the team who is doing an awesome job looking after the animals in their care. Although they are in need of a lot of items, we focussed on providing them with the basic need … food for the animals.

The staff opened their hearts and a whole lot of bags of food were donated, even some toys were added for exercise and fun.

The SPCA appreciated and welcomed the support from Alaris.

        

Wideband Conical Spiral Antennas

Alaris Antennas Spiral Antennas

Alaris Antennas designs and manufactures a range of Spiral Antennas, which can be customised to suit each client’s requirements.

Spiral antennas belong to the class of frequency independent antennas which can be designed to operate over a wide range of frequencies. Polarization, radiation pattern and impedance of these antennas remain relatively stable over a large bandwidth.

The antenna  is designed to use two conductive spiralled arms, extending from the centre outwards. The antenna may be a flat disc, with conductors resembling a pair of loose spirals, or the arms may extend in a three-dimensional shape like a spring. The direction of antenna polarisation depends on the direction of rotation of the spiral.

Possible applications of these antennas are wideband communications, spectrum monitoring, direction finding and signal suppression.

The two types of spiral antennas that are offered by Alaris Antennas are cavity backed and conical spiral antennas.

Cavity backed spiral antennas are inherently circularly polarized with medium gain. An array of spiral antennas can be used to increase the gain. The cavity changes the antenna pattern to a directional shape.

Conical spiral antennas offer higher directionality and gain, which is often required for communications and signal suppression applications.

Below are the current spiral antenna designs offered by Alaris Antennas. Please click on each product to view it on our website.

  • Product Name
  • LHCP Cavity Backed Spiral Antenna
  • LHCP Cavity Backed Spiral Antenna
  • LHCP Cavity Backed Spiral Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • High Power Circular Polarised Antenna
  • Dual Port Circular Polarised Antenna
  • Frequency Range
  • 1000 – 4000 MHz
  • 1000 – 6000 MHz
  • 6000 – 18000 MHz
  • 400 – 450 MHz
  • 1000 – 6000 MHz
  • 1000 – 1600 MHz
  • 400 – 2500 MHz
  • 2000 – 6000 MHz
  • 1000 – 6000 MHz

COJOT is proud to announce the first deliveries of Switched Beam Antennas

The first units of Switched Beam Antennas (SBAs) have been shipped to major players in the international Defence Industry – for use in different installation environments.

Switched Beam Antenna (SBA)

SBA is a directional antenna with digitally switchable antenna beam. The antenna beam can be directed 360 degrees horizontally and the beam width can be adjusted. The SBA gives optimal gain to the desired direction and provides rejection against interferences from other directions.

The SBA is suitable e.g. for complex node networks in tactical communications, providing crucial advantages like:

  • Improved coverage and LPI / LPD
  • Different beam modes (sharp, wide. omni)
  • Serves various clients or moving objects
  • Low installation cost and less complexity
  • Simple and field proven control protocol

Product example – SBA4450B

  • 4400 – 5000 MHz frequency band
  • 15 dBi gain with 25 deg beam width
  • 11 dBi gain with 95 deg beam width
  • 8 dBi gain in omnidirectional mode
  • Fast digital beam switching
  • RS-485 based control

Read More…

DF-A0037

Rugged DF-A0037 antenna system conquers harshest ocean environments

Keeping our oceans safe is not an easy task even for the best-engineered high-tech hardware.

Antennas need to cope with some of the world’s harshest and most isolated ocean environments. Intense cold, extreme corrosion, ice, rain, hail, vibration and the constant jarring force of the waves must all be overcome on a daily basis. Added to this is the requirement for maximum product reliability, given that shore-based workshops and specialist technicians are far away.

These are among the challenges being successfully met by South African-based Alaris Antennas, a designer and manufacturer of high-technology antennas. Among Alaris’ most successful products is the DF-A0037, a direction-finding antenna in service with naval peacekeeping forces from Europe, Asia and Australasia. It is capable of monitoring signals and tracking their direction of source (direction finding) in the high frequency (HF), very high frequency (VHF) and ultra-high frequency (UHF) bands. The product is used in applications such as intelligence gathering, counter-piracy, counter-smuggling, deterring illegal fishing and general security tasks.

The DF-A0037 was first unveiled in 2010 and, according to Alaris Holdings CEO Juergen Dresel, continues to be refined and customised to meet the requirements of each naval customer.

“It is a mature, proven product that is in great demand and we see strong future potential in markets such as the United States and South America. It is also under consideration by South Africa,” he says. “We have filled a niche in which we have a market-leading expertise and a solid track record. The DF-A0037 requires more than just antenna knowledge. It entails wider system knowledge so that, on a naval vessel, the competing frequencies of other equipment can be filtered out to enable the product to operate at maximum efficiency. This necessitates specialist know-how in which we have a strong competitive advantage.”

The DF-A0037 was originally developed as a land-based mobile direction-finding antenna system , but later modified for the more demanding maritime environment. Key specifications include:

  • DF frequency range: 1 – 3600 MHz
  • DF Type:                    Five element correlative interferometer
  • Number of frequency bands:         Three
  • Monitoring frequency range:          1 – 3600 MHz
  • Mechanical design:     Hardened for harsh maritime environments

Using the core competencies in research and development, engineering and manufacturing possessed by its operating companies – Alaris Antennas (South Africa) and COJOT (Finland) – Alaris Holdings provides electronic peacekeeping and communication products for a variety of applications. These include electronic counter-measures to prevent the remote detonation of bombs, jamming of enemy communications, monitoring of enemy communications and signal direction finding. The products may be mounted on vehicles, aircraft, drones, ships and submarines, or carried by individuals.

In the civilian environment, the company’s technology is used by test and measurement businesses and frequency regulatory bodies.