COJOT Product Spotlight: Smart Antennas

COJOT offers two types of Smart Antennas:

  • Switched Beam Antennas (SBAs)
  • Mission Adaptive Antennas

COJOT Switched Beam Antennas (SBAs) combine the outputs of multiple antennas in such a way that fixed beams are steered with a heightened sensitivity and gain to a particular or multiple directions. The SBA communicates with the transceiver to detect the signal strength and chooses from one to several predetermined fixed beams and switches between them as the mobile moves throughout the sector. This way the most appropriate constellation of single or multiple beams that are steered towards the desired signal can be selected.

SBA2458DB Dual Band Switched Beam Antenna for 2.4 and 5.8 GHz​

The SBA2458DB is a dual band switched beam antenna covering the 2.4 and 5.8 GHz frequency bands (WiFi). The antenna beam can be switched by remote control to achieve optimal gain to the desired direction and to avoid interference from unwanted directions. The antenna provides up to 20 sharp beams  to cover the full 360 degree horizontal area. Its extremely fast beam switching ability makes the antenna suitable for complex node network in tactical communication.

Our Switched Beam Antennas are, thanks to their ability for extremely fast beam switching, highly suitable for complex node networks in tactical communications.

COJOT Mission Adaptive Antennas are matched based on controlled band switching, where the frequency band is split into smaller slots and each slot is matched separately. The RF signal is connected through the most optimal matching circuit using RF switches and fast control logic. This switching technology is compatible with frequency hopping. The active matching is controlled by the radio or autonomously by the antenna. The control signal and supply voltage are fed to the antenna through the antenna connector or through a separate data connector.

TA3925M Tunable Vehicular VHF/UHF Mission Adaptive Antenna

The TA3925M is a tunable antenna with a steel whip radiator for the 30 to 512 MHz frequency band with optimized performace for the 30-90 MHz and 225-450 MHz bands. This low profile antenna can be tuned by remote control to use the optimum matching circuitry at the required frequency. The extremely fast tuning ability makes the antenna suitable for most of the conventional modulation types.

Visit www.cojot.com for more information

mWAVE Product Spotlight: HRP3-800 3-ft High Performance Point-to-Point Antenna

mWAVE Industries LLC (mWAVE) recently completed comprehensive testing, commercialization and production of its new 3-ft (0.9-m) diameter high performance and high gain 80 GHz point to point antenna model HRP3-800.

This high performance, high gain 3-ft (0.9m) PTP antenna model is utilized by commercial carriers, government, defense and wherever high throughput is required.  This HRP3-800 model features a field proven azimuth (AZ) and elevation (EL) fine adjustment feature that is also available on the smaller mWAVE 1-ft (0.3m) and 2-ft. (0.9m) 80-GHz models. mWAVE’s  80 GHz product line to date has had a significant impact in the high frequency PTP antenna market worldwide. This model is also available with the optional dual polarized adapter. This model is currently compatible with many of the industry leading 80 GHz OEM radio direct connect ODU designs.

The addition of the HRP3-800 high gain model allows integrators and carriers an antenna solution to achieve longer 80 GHz radio links.

With the addition of this model mWAVE expands its already comprehensive portfolio of millimeter-wave antenna designs and related products in the 60, 94 & 110 GHz frequency bands.

Product Features

  • Frequency Band: 71.0 – 86.0 GHz  (other bands available are 60 94 & 110 GHz)
  • Antenna Type: High Performance
  • Diameter: 3-ft (0.9m)
  • Gain: 54.0 dBi
  • Beam width: 0.3°
  • Cross Pol. Disc: 35-dB
  • Front to Back Ratio: 74-dB
  • Modular configurations including with and without mounts
  • Optional dual polarization adapter available
  • Features the industries easiest to install and AZ/EL adjustment mount solution.
  • Integrates into a wide range of platforms ranging from fixed, airborne, rapid deployment and ruggedized versions. Customizable applications available.

Please see the product spec sheet here

COJOT Product Spotlight: Multiuse Antennas

COJOT is offering multiuse antennas which can be installed on a vehicle or on a mast depending on the need and situation in the field. These antennas do not require a ground plane for proper operation and can be easily installed onto vehicles, shelters and masts.

These multiuse antennas are easy to use in the field and it takes only a  minute to move the radiator from the vehicle to the mast and vice versa.

Some examples of these antennas are:

WD2250M-R

WD1350M

HD2245M-R

MASTMO

For more information, visit www.cojot.com

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.