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HAIGH-FARR
What We Do
Haigh-Farr develops solutions keeping our customers’ needs and requirements at the forefront of the design. Leveraging our over 50 years of design and manufacturing experience, your antenna configuration and performance requirements may already exist. If a design meeting your requirements does not exist, Haigh-Farr can use its experience, cutting edge technology and modeling capabilities to customize a solution. Contact Haigh-Farr with your requirements, and we're sure to find a solution.
1. Products
a. Antennas
1. Conformal
2. Non-Conformal
3. Active
b. Support Hardware
1. Power Dividers, Combiners, Hybrids & Diplexers
2. Test Hats & Hoods
2. Services
a. Design and Engineering
1. Pattern Analysis
2. Mechanical Analysis
3. Thermal Analysis
b. Testing
1. RF Testing
2. Environmental Testing
CONFORMAL ANTENNAS
Wraparound Antennas
The Haigh-Farr Wraparound™ is a self-contained, omnidirectional antenna for cylindrical or conical shaped vehicles. A single point feed is used and no external splitters, combiners or cable harnesses are required for installation. The antenna may be mounted flush, or on the exterior of the vehicle.
Designs are available from 300 MHz to 13 GHz with typical applications including Flight Termination, GPS, Telemetry, Data Links and Transponder. Multiple antennas can be combined within the same physical Wraparound™, providing a multi-task solution in a single, compact package.
The Wraparound™ antenna has been flown on all types of vehicles from subsurface sea to space, including high Mach kinetic kill weapons, high G projectiles and re-entry vehicles. The Haigh-Farr Wraparound™ antenna has qualified for use on high performance vehicles flown on test and launch ranges throughout the United States and Europe. For high aero-heating applications, an ablative heat shield may be added to the antenna.
Flexislot Antennas
The Haigh-Farr Flexislot™ antenna is designed for simple installation and retrofit on flat, cylindrical and conical shaped bodies, and provides broad-beam E-plane pattern coverage. Designs are available from 300 MHz to 13 GHz.
The Flexislot™ may be arrayed to provide either directive beam shapes or wider spherical coverage. If more than one Flexislot™ is used, the necessary power divider circuitry may be contained within one of the elements, or provided as a separate device.
Haigh-Farr also manufactures the necessary cabling to feed multi-element systems. All multi-element configurations are tested as a system, including measuring the radiation patterns.
Offering unique mounting capabilities, the Flexislot™ may either be flush mounted or mounted directly to the exterior of the vehicle. It may also be secured to the vehicle using mechanical fasteners and/or adhesive bonding agents. This antenna can be mounted inside a radome for enhanced ruggedization. For high aero-heating applications an ablative heat shield may be added.
omnislot antennas
Haigh-Farr Omnislot™ antennas provide the same radiation pattern characteristics as a stub or blade antenna in a thin, conformal, aerodynamic package. Omnislot™ antennas may be used in applications where blade antennas may be damaged, such as net retrieval of remotely piloted vehicles (RPVs) or high aero-heating environments. Custom shape requirements can be accommodated.
Typical applications include data links for high-rate imaging and communications, as well as transponder signals. Designs are available from 300 MHz to 13 GHz.
The Omnislot™ antenna is flush mounted or mounted directly to the exterior of the vehicle using mechanical fasteners and/or adhesive bonding agents. This antenna can be mounted inside a radome for enhanced ruggedization. For high aero-heating applications, an ablative heat shield may be added.
Patch Antennas
Haigh-Farr patch antennas utilize our well-proven fabrication techniques and are designed to operate in high dynamic space environments. Patch antennas are thin, rugged, space qualified antennas with designs available from 150 MHz to 26 GHz and bandwidths from 1 to 10% of center frequency.
Typical applications include supersonic tactical missiles, rockets, satellites, launch vehicles, aircraft and spacecraft with a -100°C to +200°C operational temperature. The antenna is a stripline construction with all circuitry contained inside, and thus, well protected.
NON-CONFORMAL ANTENNAS
Blade Antennas
Haigh-Farr offers a family of low-cost Blade antennas covering frequencies from 300 MHz to 8 GHz. These antennas have been in use for over 30 years in airborne applications, and most models are available for off-the-shelf delivery.
Haigh-Farr also offers a series of broadband blade antennas covering a variety of frequency ranges.
The Blade antennas exhibit omnidirectional coverage in the azimuth plane with a filled-in null in the elevation plane. When mounted to a typical ground plane, the antennas provide approximately +3dBi gain. Exact gain, however, is a function of the ground plane upon which the antenna is mounted.
Blade antennas are also used in stationary applications and ground-based vehicles such as trucks, tanks, race cars, motorcycles, etc.
Button Antennas
Haigh-Farr Button antennas are designed for applications in which size and weight are critical, covering frequencies from 350 MHz to 9.6 GHz. All Button antennas provide the omnidirectional coverage of a stub, in a rugged package, with Models 2107 and 13215 designed to fill in the overhead null. Haigh-Farr offers a broader band Button (P/N BN1-13110) supporting parts of L, S, and C- bands. Like all Haigh-Farr products, our Button antennas are crafted using reliable materials and well-proven methods of construction. High-impact, high-temperature radomes, provide protection from environments containing moisture and contaminants found in airborne applications.
The antenna is mounted through a “D” hole in the vehicle and secured using a lock washer and nut, with vehicle sealing achieved through an integral O-Ring.
Active Antennas
Haigh-Farr’s newly developed Electronically Steerable Array (ESA) antennas are designed for applications where one or more simultaneous, actively directed, RF energy patterns are necessary.
From a technology perspective, these ESAs build on decades of proven digital array practices and move those fundamentals into modern 5G digital-era-chipsets. They use easily connectable, modular, multi (single or dual pol) antenna element building blocks to construct arbitrary size, planar, multi-beam phased arrays which collect horizontal and/or vertical components of any RF signal within their predetermined frequency range and within the assembly’s electrical field-of-view. RF signals from each element are conditioned, filtered, digitized and passed through FPGAs and processors running customized complex vector algorithms which provide beamforming functionality and coherent formed beams as outputs. This architecture results in digital beamforming rather than simple RF beamforming; and the end result is a system that can be tailored for numerous applications where dynamic acquisition/auto-tracking of multiple data streams coming from multiple RF emitters simultaneously is needed. As these emitters move the ESA stays locked onto the various signals for continuous RF coverage.
From a usage perspective, Haigh-Farr’s new ESA can be used for applications ranging from multi-faceted/multi-layered test scenarios where several bogeys and attack assets need to be acquired simultaneously to satellite or spacecraft operations where RF energy needs to maintain lock on multiple ground assets as the emitting vehicle orbits the Earth to drones needing to stay in communication with one or more airborne telemetry/command-and-control platforms as the entire acquisition scene moves across the sky.
Support Hardware
Power Dividers, Combiners, Hybrids & Diplexers
Power Dividers, Combiners, Hybrids & Diplexers
Power Dividers, Combiners, Hybrids & Diplexers
Haigh-Farr’s versatile line of power dividers/combiners provides 2, 3, 4, or 6-way division and is available from UHF to X-Band frequencies. Complementing the line of equal amplitude in-phase models, Haigh-Farr offers unequal amplitude distribution, phase progression, and quadrature hybrid models.
Power dividers/combiners and diplexers are flat for most applications, but may be curved to mate with cylindrical or conical surfaces. Matching cables are available.
TEST HATS & HOODS
Power Dividers, Combiners, Hybrids & Diplexers
Power Dividers, Combiners, Hybrids & Diplexers
Haigh-Farr test hats provide a tight EMI seal, minimizing RF leakage, typically to -80 dB or lower. We construct our test hats out of a solid aluminum, one-piece case with a conductive EMI gasket where the hat is in contact with the ground plane and the antenna. The coupling factor is a design parameter; however, it ranges from 4 dB to 30 dB, with each hat calibrated. Haigh-Farr hats are designed to work with single or multiband Flexislot™ and Patch antennas, as well as single or multi-channel Wraparound™ antennas.
Design and Engineering
Pattern Analysis
Mechanical Analysis
Pattern Analysis
At Haigh-Farr, we understand this over-arching principal of antenna design, and employ a variety of techniques to assure your hardware meets your pattern coverage and gain. We use both commercially available products, as well as in-house proprietary tools, to model exactly how our antennas will perform when mounted on your vehicle and used in your environment. Haigh-Farr simulations take into account specific vehicle geometries and co-site objects, such as fins of a missile or blades of a helicopter.
Thermal Analysis
Mechanical Analysis
Pattern Analysis
At Haigh-Farr, we understand that our hardware may be used in high-aero heating environments and we need to ensure that the antenna is properly protected. Haigh-Farr has the capability of using provided thermal data to calculate the temperature of the antenna in flight. This understanding helps Haigh-Farr choose the right thermal protection for your antenna.
Mechanical Analysis
Mechanical Analysis
Mechanical Analysis
Our antennas and ancillary passive components have survived some of the most severe environments, because we, at Haigh-Farr, prioritize the mechanical details of our designs. Whether we see the need to strengthen the sidewalls of an SMA connector on a passive device or create the entire backing plate of an antenna, including the connector, out of one continuous piece of steel, aluminum, or titanium, we have a solution to make certain the mechanical integrity of our hardware stays intact throughout the life-cycle of the design. At Haigh-Farr, we understand the necessity for our hardware to survive your environments and your mission.
Testing
RF Testing
Environmental Testing
Environmental Testing
When your business is antennas, you need to have the ability to ensure those antennas perform exactly as advertised. At Haigh-Farr, we take seriously the task of testing our antennas (and ancillary hardware) so that our customers know that their RF needs are being met. In total, Haigh-Farr has 4 anechoic chambers capable of handling the most demanding RF test requirements and meeting the most aggressive schedules:
- One Farfield chamber for Low frequency work - 300 MHz to 13.5 GHz
- One Farfield chamber for higher frequency work - 1.5 GHz to 26.5 GHz
- MVG Stargate Spherical Nearfield Antenna Measurement System - 200 MHz to 18 GHz
- NSI-MI Spherical Nearfield Antenna Measurement System - 200 MHz to 40 GHz
All of our chambers utilize Agilent test equipment and are controlled by Orbit FR software and positioners. Finally, the chambers are run by our RF testing team and/or RF design engineers. From the initial design-of-test to the final interpretation of data, this dedicated and talented group of antenna experts leads the way.
Environmental Testing
Environmental Testing
Environmental Testing
At Haigh-Farr, we take great pride in our hardware’s ability to survive the harshest of environmental conditions while meeting or exceeding the RF performance needs of our customers. Haigh-Farr products have an excellent track record of surviving and performing in many extreme environments including deep space, high velocity/high aero, and range safety applications. We accomplish this by running our delivered goods through a robust test program. In the majority of cases, we can do all of our testing in-house using Haigh-Farr equipment and expertise, and running on a customer-driven, Haigh-Farr controlled schedule.
Regarding Haigh-Farr’s in-house capabilities, the list of environmental test equipment is significant, and continues to grow. Haigh-Farr currently has 7 thermal chambers, a thermal vacuum chamber specifically designed for the testing of antennas, and two UD T2000 shakers used for not only random and sine vibration but simulated shock as well. Also, Haigh-Farr has 2 humidity chambers and a resonant-beam shock system for higher shock level requirements. Finally, we have the ability to merge or combine testing capabilities such as vibration and shock testing at flight temperatures.