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The Leader in Millimeter-wave Technology and Solutions
Antenna / Quasioptical
Scalar Feed Horns (SFH)

Millitech series SFH scalar horn antennas are both physically and electromagnetically symmetrical, and lend themselves to either multiple polarizations or polarization-independent (scalar) operation. The suppression of E-plane wall currents provides a nearly symmetrical radiation pattern. Thus, SFH scalar horns have nearly identical beamwidths in both E- and H-planes, as well as specially-designed low sidelobes. Scalar horns are particularly suited to generating higher order modes for use in very efficient monopulse applications.

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Scalar Feed Horns (SFH)
Conical Horn Antennas (CHA)

Series CHA conical horn antennas are a cost-effective alternative to the scalar feedhorns, with beamwidths ranging from 10º to 60º. They have lower sidelobe levels than pyramidal horns (such as series SGH standard gain horns), because the TE 11 mode electric field distribution is tapered in both dimensions of the horn aperture. However, the beam is asymmetric in the two planes, and the sidelobes are higher than for series SFH antennas.

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Conical Horn Antennas (CHA)
Cassegrain Reflector Antennas (CRA)

The series CRA Cassegrain reflector antenna is available from 18 to 220 GHz with reflector diameters from 6 to 48 inches. The 3 dB beamwidth and gain of the antenna are dependent on the diameter of the main reflector and the frequency. The sidelobes are slightly higher than those of the GOA series. The series CRA design offers compactness, versatility and high gain. It can support multiple polarization by incorporating the series OMT orthomode transducer.

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Cassegrain Reflector Antennas (CRA)
18-40GHz Dual Polarization Ant. (DPA)

Millitech’s series DPA antennas provide simultaneous dual polarization and frequency coverage from 18-40 GHz. No RF blockage of the aperture ensures excellent performance. The mechanical design of these antennas allows for simple assembly/disassembly without affecting performance.

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18-40GHz Dual Polarization Ant. (DPA)
Dual Pol. Ridged Horn Antennas (DPR)

Millitech series DPR dual polarization ridged horn antennas are manufactured from aluminum alloy and offer high performance over a wide bandwidth from 18 to 40 GHz. These antennas can support simultaneous vertical and horizontal polarizations with a ypical isolation of 25 dB. These horns come equipped with two Type K (2.9 mm) connectors. The half power (-3 dB) beamwidth for these horns is typically 40° over the entire 22 GHz bandwidth.

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Dual Pol. Ridged Horn Antennas (DPR)
Gaussian Optical Antennas (GOA)

The series GOA is a Gaussian optics lens antenna that provides high efficiency and low sidelobes. It offers symmetric antenna patterns in E- and H-planes. The antenna is available in frequencies ranging from 18 to 220 GHz. The gain and 3 dB beamwidth depend on the aperture size of the lens and the frequency. The antenna can be configured in a number of ways to offer polarization diversity.

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Gaussian Optical Antennas (GOA)
18-40 GHz Lens Antenna (GOLA)

These 18 - 40 GHz Gaussian Optic Antennas provide superior efficiency due to low blockage and low-loss optics. The dual-polarization versions have excellent cross-polarization isolation using a grid polarizer and two linear polarized feeds.

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18-40 GHz Lens Antenna (GOLA)
Linear-Circular Polarizer (POL)

Millitech series POL linear-circular polarizers convert a linearly-polarized signal to a circularly-polarized signal (or vice versa) in a circular waveguide. They operate over a maximum bandwidth of 10% of the center frequency with a typical axial ratio of 1 dB. The polarizers can be connected to an orthomode transducer or circular-to-rectangular transition as applicable.

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Linear-Circular Polarizer (POL)
E-Band Linear-Circular Polarizer (POL)

Millitech’s high performance E-Band Linear-to-Circular Polarizer offers a low axial ratio of < 0.6 dB, a low insertion loss of < 0.5 dB, and a typical VSWR of 1.25:1 within the high and low unlicensed communication bands (71 – 86 GHz).

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Linear-Circular Polarizer (POL-12-1251)
Freestanding Wire Grid Polarizer (GFS)

The series GFS freestanding wire grid polarizer consists of an array of parallel wires stretched tightly into a planar surface and affixed to a mounting frame. The closely spaced wires reflect essentially 100% of the electric field components parallel to the direction of the wires and transmit the component of the field perpendicular to the wires.

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Freestanding Wire Grid Polarizer (GFS)
Orthomode Transducer (OMT)

The series OMT orthomode transducer is used to combine or separate two orthogonal linearly polarized signals simultaneously. Typically, the output (or input) port is in the circular waveguide, which can support linear polarization. Isolation is greater than 25 dB between the two linear polarizations, and narrower band versions with greater isolation are also available. This transducer can be used in conjunction with the series POL polarizer to handle circular polarized signals.

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Orthomode Transducer (OMT)
Cir. to Rect. Waveguide Adapter (WAC)

Millitech series WAC circular-to-rectangular waveguide adapters are available to provide transition from standard rectangular waveguide to circular waveguide. These adapters can be used with conical and scalar feedhorns, and provide wide bandwidth with low VSWR. Transitions to convert appropriate rectangular waveguide bands to applicable circular waveguide are available in a complete range of flange patterns.

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Cir. to Rect. Waveguide Adapter (WAC)
Standard Gain Horn (SGH)

The series SGH standard gain horns, offered as conical and pyramidal, are used to measure gain of other antennas. These horns are offered from 18 to 325 GHz in twelve waveguide bands. The SGH horns are ideally suited for reference sources in dual channel antenna test receivers, and can be used as pickup horns for radiation monitoring.

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Standard Gain Horn (SGH)
Monopulse Comparator (MPC)

The series MPC monopulse comparator features unrivaled insertion loss performance far superior to typical industry counterparts. The comparator is a 5-port device that can be used in target acquisition and tracking systems.

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Monopulse Comparator (MPC)
Trihedral Corner Reflector (TCC)

The series TCC trihedral corner reflectors provide a very high radar cross section (RCS) target for radar testing and characterization. With suitable alignment, the effect of clutter on measurements such as that caused by vehicles, terrain and structures can be greatly reduced. Select from the variety of sizes available to attainthe desired RCS for the frequency of your application.

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Trihedral Corner Reflector (TCC)
Waveguide Rotary Joint (WRJ)

The Waveguide Rotary Joint allows the transmission of RF signals from stationary to 360˚ rotating rectangular waveguide. Common applications include scanning antennas of any kind used in radar and radiometer systems.

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Waveguide Rotary Joint (WRJ)
Custom Components

Millitech will engineer custom variations of our standard MMW components, as well as, multi-component assemblies and solutions, with minimal non-recurring engineering (NRE) costs, to meet your specific requirements. Typically these modification are to meet one or more of the following requirements:

  • Tuned for specific performance characteristics
  • Extended operational temperatures
  • MIL/Space qualified
  • Hi-rel screening
  • RoHS compliant
  • ITAR compliant

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Custom Components
Antenna Testing Services

Near-field Range

Millitech's capabilities measuring high gain millimeter wave antennas are unsurpassed with our Near-field Range (NFR). In a traditional Far-field Range, large millimeter-wave antennas can require in excess of 1,000 m of range for accurate measurements. Because of the distance requirements, this often means testing outdoors in an uncontrolled environment, which results in an unacceptable amount of variability in the measurements.

For millimeter-wave phased arrays, accurate measurement of such antennas and the ability to troubleshoot down to specific elements are required. We are currently equipped with a Nearfield Systems 5' x 5' planar Near-field Antenna Range with a granite base for added stability. Our Near-field Range allows us to move this testing into an indoor controlled setting and measure large high gain antennas with sidelobes in some cases 50 dB below the peak, and beam pointing to the 1/100th of a degree from 8GHz to 225GHz using phase coherent Millitech frequency extenders. For a near-field measurement, the phase front measured in a close proximity to the antenna under test is mathematically transformed into a far-field pattern using the FFT algorithm. With higher frequencies, reflector imperfections in a traditional compact range and reflections within the room become a significant source of error.

Contact Millitech sales or your local representative for more information

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Antenna Testing Services

Antenna and Quasioptical Products

Millitech's full range of MMW antenna products and technologies includes Cassegrain reflector, feed horn, standard gain horn, and Gaussian optic lens antennas, as well as, custom designed antenna arrays.  Our comprehensive range of antenna product offerings also includes polarizers, orthomode transducers, reflectors, comparators, and waveguide adapters to allow us to provide the most complete technical solutions for applications up to 300 GHz.

IEEE Radar bands
Letter Designation Frequency range
X band 8 to 12 GHz
Ku band 12 to 18 GHz
K band 18 to 26.5 GHz
Ka band 26.5 to 40 GHz
Q band 33 to 50 GHz
U band 40 to 60 GHz
V band 50 to 75 GHz
E band 60 to 90 GHz
W band 75 to 110 GHz
F band 90 to 140 GHz
D band 110 to 170 GHz
G band 140 to 220 GHz