Product Description
Mi-Wave’s Spot Focus Antennas for Satellite Communications, including the 257 Series, are high-gain directional antennas engineered for precise beam control, long-range performance, and stable radiation patterns across microwave and millimeter-wave frequencies. These antennas are designed to support modern SatCom systems where focused energy delivery and high link margins are critical.
The 257 Series Spot Focus Antennas utilize precision feed assemblies and optimized reflector geometries to concentrate RF energy into a tightly controlled beam. This focused radiation improves uplink and downlink efficiency, reduces off-axis interference, and supports reliable operation in gateway terminals, feeder links, and ground station infrastructure operating at high frequencies.
Operating from 8.4 GHz to 260 GHz, Mi-Wave spot focus antennas support a wide range of satellite communication bands, including Ka-Band, Q-Band, and V-Band, making them well suited for next-generation high-throughput satellite systems.
Note: The 257 Series spot focus antennas shown represent only a portion of Mi-Wave’s antenna capabilities. Custom spot focus antenna designs are available to support specific frequency bands, waveguide interfaces, gain requirements, polarization options, and application-specific needs. Consult with Mi-Wave to discuss your requirements.
Note: Our website contains just a few types of Antennas we build. Consult with us for your specific needs.
| Waveguide Band | Model No. | Reflector diameter (inches) | Circular Waveguide Internal Diameter (.XXX in Model No.) in Inches | Frequency Range (GHz) | Spot Size (inches) | Focal Length (inches) | Polarization | VSWR | Antenna Port | Lens material | Housing material |
|---|---|---|---|---|---|---|---|---|---|---|---|
| X Band | 257X-12/.XXX/39 | 12 | .XXX=1.094 .XXX=.938 .XXX= .797 | 8.2-9.97 8.5-11.6 9.97-12.4 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-39/U Flange | Rexolite | HDPE |
| Ku Band | 257Ku-9/.XXX/419 | 9 | XXX=.660 XXX=.550 | 12.4-14.6 14.6-18 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-419/U Flange | Rexolite | HDPE |
| Ku Band | 257Ku-12/.XXX/419 | 12 | XXX=.660 XXX=.550 | 12.4-14.6 14.6-18 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-419/U Flange | Rexolite | HDPE |
| K Band | 257K-6/.XXX/595 | 6 | XXX=.470 XXX .396 XXX=.328 | 18-20.5 20.4-24.5 24.5-26.5 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-595/U Flange or UG-425/U Flange | Rexolite | HDPE |
| K Band | 257K-9/.XXX/595 | 9 | XXX=.470 XXX .396 XXX=.328 | 18-20.5 20.4-24.5 24.5-26.5 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-595/U Flange or UG-425/U Flange | Rexolite | HDPE |
| K Band | 257K-12/.XXX/595 | 12 | XXX=.470 XXX .396 XXX=.328 | 18-20.5 20.4-24.5 24.5-26.5 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-595/U Flange or UG-425/U Flange | Rexolite | HDPE |
| Ka-Band | 257A-6/.XXX/599 | 6 | XXX=.328 XXX=.281 XXX=.250 XXX= .219 | 26.5-28.5 28.5-33.0 33.0 -38.5 38.5-40.0 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-599/U Flange or UG-381/U Flange | Rexolite | HDPE |
| Ka-Band | 257A-9/.XXX/599 | 9 | XXX=.328 XXX=.281 XXX=.250 XXX= .219 | 26.5-28.5 28.5-33.0 33.0 -38.5 38.5-40.0 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-599/U Flange or UG-381/U Flange | Rexolite | HDPE |
| Ka-Band | 257A-12/.XXX/599 | 12 | XXX=.328 XXX=.281 XXX=.250 XXX= .219 | 26.5-28.5 28.5-33.0 33.0 -38.5 38.5-40.0 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-599/U Flange or UG-381/U Flange | Rexolite | HDPE |
| B-band | 257B-3/.XXX/383 | 3 | XXX=.250 XXX=.219 XXX=.188 | 33.0-38.5 38.5-43.0 43.0-50.0 | 1.0-1.5 | 4 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U Flange | Rexolite | Aluminum |
| B-band | 257B-6/.XXX/383 | 6 | XXX=.250 XXX=.219 XXX=.188 | 33.0-38.5 38.5-43.0 43.0-50.0 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U Flange | Rexolite | HDPE |
| B-band | 257B-9/.XXX/383 | 9 | XXX=.250 XXX=.219 XXX=.188 | 33.0-38.5 38.5-43.0 43.0-50.0 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U Flange | Rexolite | HDPE |
| B-band | 257B-12/.XXX/383 | 12 | XXX=.250 XXX=.219 XXX=.188 | 33.0-38.5 38.5-43.0 43.0-50.0 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U Flange | Rexolite | HDPE |
| U-band | 257U-3/.XXX/383 | 3 | XXX=.219 XXX=.188 XXX=.165 XXX=.141 | 38.5-43.0 43.0-50.0 50.0-58.0 58.0-60.0 | 1.0-1.5 | 4 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U-M Flange | Rexolite | Aluminum |
| U-band | 257U-6/.XXX/383 | 6 | XXX=.219 XXX=.188 XXX=.165 XXX=.141 | 38.5-43.0 43.0-50.0 50.0-58.0 58.0-60.0 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U-M Flange | Rexolite | HDPE |
| U-band | 257U-9/.XXX/383 | 9 | XXX=.219 XXX=.188 XXX=.165 XXX=.141 | 38.5-43.0 43.0-50.0 50.0-58.0 58.0-60.0 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U-M Flange | Rexolite | HDPE |
| U-band | 257U-12/.XXX/383 | 12 | XXX=.219 XXX=.188 XXX=.165 XXX=.141 | 38.5-43.0 43.0-50.0 50.0-58.0 58.0-60.0 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-383/U-M Flange | Rexolite | HDPE |
| V-band | 257V-3/.XXX/385 | 3 | XXX=.165 XXX=.141 XXX=.125 | 50.0-58.0 58.0-68.0 68.0-75.0 | 1.0-1.5 | 4 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-385/U Flange | Rexolite | Aluminum |
| V-band | 257V-6/.XXX/385 | 6 | XXX=.165 XXX=.141 XXX=.125 | 50.0-58.0 58.0-68.0 68.0-75.0 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-385/U Flange | Rexolite | HDPE |
| V-band | 257V-9/.XXX/385 | 9 | XXX=.165 XXX=.141 XXX=.125 | 50.0-58.0 58.0-68.0 68.0-75.0 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-385/U Flange | Rexolite | HDPE |
| V-band | 257V-12/.XXX/385 | 12 | XXX=.165 XXX=.141 XXX=.125 | 50.0-58.0 58.0-68.0 68.0-75.0 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-385/U Flange | Rexolite | HDPE |
| E-band | 257E-3/.XXX/387 | 3 | XXX=.141 XXX=.125 XXX=.110 XXX=.094 | 60.0-68.0 68.0-77.0 77.0-87.0 87.0-90.0 | 1.0-1.5 | 4 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U Flange | Rexolite | Aluminum |
| E-band | 257E-6/.XXX/387 | 6 | XXX=.141 XXX=.125 XXX=.110 XXX=.094 | 60.0-68.0 68.0-77.0 77.0-87.0 87.0-90.0 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U Flange | Rexolite | HDPE |
| E-band | 257E-9/.XXX/387 | 9 | XXX=.141 XXX=.125 XXX=.110 XXX=.094 | 60.0-68.0 68.0-77.0 77.0-87.0 87.0-90.0 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U Flange | Rexolite | HDPE |
| E-band | 257E-12/.XXX/387 | 12 | XXX=.141 XXX=.125 XXX=.110 XXX=.094 | 60.0-68.0 68.0-77.0 77.0-87.0 87.0-90.0 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U Flange | Rexolite | HDPE |
| W-band | 257W-3/.XXX/387 | 3 | XXX=.125 XXX=.110 XXX=.094 XXX=.082 | 75.0-77.0 77.0-87.0 87.0-100.0 100.0-110.0 | 1.0-1.5 | 4 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U-M Flange | Rexolite | Aluminum |
| W-band | 257W-6/.XXX/387 | 6 | XXX=.125 XXX=.110 XXX=.094 XXX=.082 | 75.0-77.0 77.0-87.0 87.0-100.0 100.0-110.0 | 1.0-1.5 | 8 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U-M Flange | Rexolite | HDPE |
| W-band | 257W-9/.XXX/387 | 9 | XXX=.125 XXX=.110 XXX=.094 XXX=.082 | 75.0-77.0 77.0-87.0 87.0-100.0 100.0-110.0 | 1.0-1.5 | 9- 10 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U-M Flange | Rexolite | HDPE |
| W-band | 257W-12/.XXX/387 | 12 | XXX=.125 XXX=.110 XXX=.094 XXX=.082 | 75.0-77.0 77.0-87.0 87.0-100.0 100.0-110.0 | 1.0-1.5 | 12- 14 | Circular Polarized | 1.3:1 | Circular Waveguide with UG-387/U-M Flange | Rexolite | HDPE |
Why Choose Mi-Wave for SatCom Spot Focus Antennas
Mi-Wave is a trusted manufacturer of microwave and millimeter-wave antennas supporting satellite communication systems worldwide. Our 257 Series Spot Focus Antennas are designed, manufactured, and tested to meet the performance demands of SatCom gateways, feeder links, and ground station installations.
SatCom-Driven Engineering
Each antenna is engineered for high gain, controlled beamwidth, low sidelobe levels, and stable polarization, ensuring predictable performance across satellite frequency bands.
Broad Frequency and Waveguide Expertise
Mi-Wave supports spot focus antenna solutions across X- through sub-millimeter-wave bands, with standard WR waveguide interfaces to simplify integration into SatCom RF chains.
Custom SatCom Solutions
Custom spot focus antenna configurations are available to support:
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Ka-, Q-, and V-Band SatCom systems
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Specific beamwidth and gain requirements
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WR waveguide size selection
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Mechanical and mounting constraints for gateway environments
Our sales engineering team works directly with customers to ensure optimal system performance.
Features
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Wide frequency coverage from 8.4 GHz to 260 GHz, supporting RF, microwave, millimeter-wave, and sub-millimeter-wave applications across multiple industry-standard bands.
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Simple, robust mechanical design that delivers stable, repeatable antenna performance while minimizing alignment sensitivity and reducing long-term maintenance requirements.
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Broad selection of beamwidth options, allowing system designers to optimize coverage, gain, and spatial resolution for specific system and link requirements.
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Multiple reflector size configurations available to meet gain targets, beam shaping needs, and physical integration constraints.
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Precision manufacturing and alignment, ensuring consistent radiation patterns, low sidelobe levels, and predictable performance across the operating frequency band.
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Suitable for laboratory, production, and field environments, including test and measurement setups, communication links, and radar systems.
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Custom configurations available, including specialized frequency ranges, reflector geometries, mounting options, and polarization requirements to support unique applications.
Applications
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Satellite Gateway and Ground Station Antennas
Used in fixed and transportable satellite gateway and ground station installations where high gain, narrow beamwidth, and precise pointing are required to maintain reliable uplink and downlink performance. -
Ka-Band, Q-Band, and V-Band Feeder Links
Supports high-capacity feeder links operating at Ka-, Q-, and V-Band frequencies, enabling increased bandwidth, higher data rates, and efficient spectrum utilization in next-generation satellite networks. -
Point-to-Point Satellite Communication Systems
Ideal for line-of-sight satellite communication links that require focused energy delivery, strong link margins, and minimal interference between adjacent systems. -
High-Throughput Satellite (HTS) Infrastructure
Enables the deployment of high-throughput satellite architectures by providing the high gain and beam control needed to support multi-beam payloads, dense frequency reuse, and high-capacity ground infrastructure. -
Telemetry and Tracking Systems
Used in satellite telemetry, tracking, and command systems where stable beam patterns and consistent antenna performance are essential for accurate data acquisition and system monitoring. -
SatCom Test, Measurement, and System Validation Environments
Applied in laboratory and field test setups for antenna characterization, link validation, system commissioning, and performance verification of satellite communication hardware.
What This Product Does for SatCom Systems
High-Gain, Focused Beam Radiation
Spot focus antennas concentrate RF energy into a narrow, high-gain beam, improving effective radiated power and receive sensitivity in satellite communication systems. This focused beam is essential for long-distance SatCom links, where maintaining link margin and minimizing interference are critical.
In SatCom applications, the focused radiation pattern:
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Improves uplink and downlink efficiency
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Supports accurate antenna pointing and alignment
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Reduces interference from adjacent systems
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Enhances overall gateway and feeder link performance
The 257 Series maintains stable beam characteristics across the operating band, ensuring reliable performance in both laboratory testing and field deployment.
Frequency Coverage and Waveguide Bands (257 Series)
Mi-Wave’s 257 Series Spot Focus Antennas are available with standard rectangular waveguide interfaces supporting the following frequency ranges and bands:
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WR-90 | 8.2–12.4 GHz | X-Band
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WR-62 | 12.4–18.0 GHz | Ku-Band
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WR-42 | 18.0–26.5 GHz | K-Band
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WR-28 | 26.5–40.0 GHz | Ka-Band
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WR-22 | 33.0–50.0 GHz | Q-Band
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WR-15 | 50.0–75.0 GHz | V-Band
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WR-10 | 75.0–110.0 GHz | W-Band
Extended frequency coverage up to 260 GHz is available for advanced SatCom development and research applications.



