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Scalar Feed Horn Antennas

8.4 to 220 GHz Available

Product Description

Mi-Wave’s Scalar Feed Horn Antennas from Series 268 are precision-engineered wideband antennas that combine the broadband response of horn antennas with scalar feed tuning to deliver smooth radiation patterns, low VSWR, and excellent phase center stability across broad frequency ranges.

The Series 268 design is optimized to provide consistent gain, predictable beam symmetry, and reliable directivity in demanding RF, microwave, and millimeter-wave systems. These antennas are ideal for engineers seeking stable performance across communications, radar, test, and measurement applications.

Scalar feed horn antennas are suitable for laboratory environments, field deployments, and direct integration into RF subsystems or instrumentation.

Note: This website highlights a limited selection of the antennas Mi-Wave produces. Our engineering team regularly develops custom antenna solutions tailored to specific frequency bands, performance targets, and system requirements. Contact Mi-Wave for custom designs.

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Waveguide BandModel No.Circular Waveguide Internal Diameter (.XXX in Model No.) in InchesFrequency Range (GHz)Gain (dB) (XX in Model No)3 dB Beamwidth E Plane (degrees)3 dB Beamwidth H Plane (degrees)PolarizationVSWRAntenna Port
X Band268X-XX/.XXX/39 268X-XX/39.XXX=1.094 .XXX=.938 .XXX= .7978.2-9.97 8.5-11.6 9.97-12.4152226Linear and Circular1.5:1Circular Waveguide with UG-39/U Flange or WR-90 with UG-39/U
Ku Band268Ku-XX/.XXX/419 268Ku-XX/419XXX=.660 XXX=.55012.4-14.6 14.6-18152226Linear and Circular1.5:1Circular Waveguide with UG-419/U Flange or WR-62 with UG-419/U
K Band268K-XX/.XXX/595 268K-XX/595XXX=.470 XXX .396 XXX=.32818-20.5 20.4-24.5 24.5-26.5152226Linear and Circular1.5:1Circular Waveguide with UG-595/U Flange or WR-42 Waveguide with UG-595/U Flange
Ka-Band268A-XX/.XXX/599 268A-XX/599XXX=.328 XXX=.281 XXX=.250 XXX= .21926.5-28.5 28.5-33.0 33.0 -38.5 38.5-40.0152226Linear and Circular1.5:1Circular Waveguide with UG-599/U Flange
B-band268B-XX/.XXX/383 268B-XX/383XXX=.250 XXX=.219 XXX=.18833.0-38.5 38.5-43.0 43.0-50.0 152226Linear and Circular1.5:1Circular Waveguide with UG-383/U Flange
U-band268U-XX/.XXX/383 268U-XX/383XXX=.219 XXX=.188 XXX=.165 XXX=.14138.5-43.0 43.0-50.0 50.0-58.0 58.0-60.0152226Linear and Circular1.5:1Circular Waveguide with UG-383/U-M Flange
V-band268V-XX/.XXX/385 268V-XX/385XXX=.165 XXX=.141 XXX=.12550.0-58.0 58.0-68.0 68.0-75.0152226Linear and Circular1.5:1Circular Waveguide with UG-385/U Flange
E-band268E-XX/.XXX/387 268V-XX/387XXX=.141 XXX=.125 XXX=.110 XXX=.09460.0-68.0 68.0-77.0 77.0-87.0 87.0-90.0152226Linear and Circular1.5:1Circular Waveguide with UG-387/U Flange
W-band268W-XX/.XXX/387 268W-XX/387XXX=.125 XXX=.110 XXX=.094 XXX=.08275.0-77.0 77.0-87.0 87.0-100.0 100.0-110.0152226Linear and Circular1.5:1Circular Waveguide with UG-387/U-M Flange

Scalar Feed Horn Antennas

Mi-Wave designs and manufactures high-performance scalar feed horn antennas engineered for reliable operation across RF, microwave, and millimeter-wave frequency ranges. With decades of experience in high-frequency RF hardware, Mi-Wave delivers scalar feed horn antennas built to meet demanding electrical and mechanical performance requirements.

Scalar feed horn waveguide antennas are widely used due to their high power handling capability, strong directivity, low insertion loss, and stable electrical performance across wide bandwidths. Mi-Wave scalar feed horn antennas are designed to maintain low gain variation across the operating frequency band, making them well suited for precision communication, radar, and test applications.

Wide-angle scalar feed horn antennas are part of Mi-Wave’s broader portfolio of RF products and components supplied to customers worldwide, supporting both laboratory and field-deployed systems.

Features

  • Low VSWR across the operating frequency band, ensuring efficient power transfer, minimal signal reflection, and improved overall system performance.

  • Wide bandwidth capability, allowing a single antenna to support multiple frequencies without the need for retuning or replacement.

  • Narrow and well-controlled beamwidths, providing high directivity, improved link margins, and reduced susceptibility to off-axis interference.

  • Polarization-insensitive design, enabling consistent performance regardless of signal polarization and simplifying system integration.

  • High power handling capability, suitable for demanding transmit and receive applications.

  • Low insertion loss and stable electrical characteristics, supporting accurate measurements and reliable long-term operation.

  • Precision mechanical construction, ensuring repeatable performance in both laboratory and field environments.

  • Compatibility with standard waveguide interfaces, allowing easy integration into existing RF, microwave, and millimeter-wave systems.

Applications

  • Radar and Telemetry Systems
    Used in radar, tracking, and telemetry applications where consistent beam shape, stable gain, and reliable signal transmission are required for accurate measurement and monitoring.

  • Point-to-Point Communication Systems
    Ideal for line-of-sight RF, microwave, and millimeter-wave communication links that demand high directivity, strong link margins, and minimal interference.

  • Test and Measurement Environments
    Commonly used for antenna characterization, gain measurements, system calibration, and validation in laboratory and field test setups.

  • RF, Microwave, and Millimeter-Wave Communication Links
    Supports broadband signal transmission and reception across a wide range of frequencies.

  • Research and Development Platforms
    Suitable for R&D applications requiring wideband performance, predictable radiation patterns, and repeatable results.

Why Choose Mi-Wave

Mi-Wave is a trusted manufacturer of RF, microwave, and millimeter-wave antennas and components, supporting commercial, government, and research systems worldwide. Our scalar feed horn antennas are engineered to deliver wideband performance, stable radiation patterns, and reliable electrical characteristics in demanding high-frequency applications.

High-Frequency Engineering Expertise

With decades of experience in microwave and millimeter-wave design, Mi-Wave develops scalar feed horn antennas optimized for low VSWR, controlled beamwidth, and consistent gain across broad operating bandwidths.

Precision Manufacturing and Quality Control

Each antenna is manufactured using precision machining and assembly processes to ensure repeatable electrical performance, mechanical stability, and long-term reliability.

Broad Frequency and Application Support

Mi-Wave supports scalar feed horn antennas across a wide range of RF and microwave frequency bands, making them suitable for communications, radar, telemetry, and test environments.

Custom Antenna Solutions

In addition to standard offerings, Mi-Wave provides custom scalar feed horn antenna designs tailored to specific frequency ranges, bandwidths, polarization requirements, waveguide interfaces, and mechanical constraints. Our sales engineering team works closely with customers to ensure seamless system integration.

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How Scalar Feed Horn Antennas Work and What They Do

Scalar feed horn antennas are wideband horn antennas that use a precision scalar feed structure to control how electromagnetic energy transitions from a waveguide into free space. The scalar feed typically consists of concentric grooves or corrugations near the horn aperture, which shape the electromagnetic fields to improve impedance matching and radiation behavior across a wide frequency range.

This design results in low VSWR, stable phase center behavior, smooth radiation patterns, and consistent gain across RF, microwave, millimeter-wave, and sub-millimeter-wave frequencies. Compared to standard horn antennas, scalar feed horns provide improved beam symmetry, polarization purity, and sidelobe control, making them ideal for broadband and high-frequency applications.

Wideband RF, Microwave, and Millimeter-Wave Radiation

Scalar feed horn antennas efficiently launch RF energy into free space with narrow, well-controlled beamwidths and predictable radiation patterns. Their wideband capability allows a single antenna to operate across multiple frequency bands without retuning, reducing system complexity and improving measurement repeatability.

These antennas are widely used in applications where stable beam shape, consistent gain, and low reflection loss are critical, including communication links, radar systems, and antenna measurement environments.

Frequency Coverage and WR Waveguide Interfaces

Mi-Wave scalar feed horn antennas support operation across an extended range of RF, microwave, millimeter-wave, and sub-millimeter-wave frequencies, depending on configuration. Typical coverage spans from 8.2 GHz through 330 GHz, supporting industry-standard bands up to H-Band.

Supported rectangular waveguide (WR) interfaces include:

  • WR-90 | 8.2–12.4 GHz | X-Band

  • WR-62 | 12.4–18.0 GHz | Ku-Band

  • WR-42 | 18.0–26.5 GHz | K-Band

  • WR-28 | 26.5–40.0 GHz | Ka-Band

  • WR-22 | 33.0–50.0 GHz | Q-Band

  • WR-15 | 50.0–75.0 GHz | V-Band

  • WR-10 | 75.0–110.0 GHz | W-Band

  • WR-6.5 | 110–170 GHz | D-Band

  • WR-5.1 | 140–220 GHz | G-Band

  • WR-3.4 | 220–330 GHz | H-Band

This wide compatibility enables scalar feed horn antennas to integrate seamlessly into high-frequency RF chains, including transmitters, receivers, frequency converters, amplifiers, and precision test instrumentation.

Why Scalar Feed Horns Matter

Because of their controlled aperture fields and wideband impedance matching, scalar feed horn antennas deliver key advantages essential to high-frequency systems:

  • Low VSWR across extremely wide bandwidths, improving power transfer and system efficiency

  • Stable polarization characteristics, reducing polarization mismatch and measurement error

  • Symmetrical radiation patterns for predictable and repeatable performance

  • Consistent gain and beamwidth from microwave through sub-millimeter-wave frequencies

  • Reduced sidelobes and pattern distortion compared to standard horn antennas

These characteristics make scalar feed horn antennas a trusted solution for radar and telemetry systems, point-to-point communication links, antenna characterization, and RF, microwave, millimeter-wave, and sub-millimeter-wave test and measurement environments.