AY-250
250MHz High Gain Yagi Antenna
| Model | Product Description | Frequency | Gain | Download | Enquiry | |
|---|---|---|---|---|---|---|
| AY-250 | 250MHz High Gain Yagi Antenna | 220-290MHz | 13 dBi. |  |  |  |
The AY-250 is a professional-grade, high-gain directional Yagi antenna specifically engineered for the 220–290 MHz frequency range. Delivering a robust 13 dBi (11 dBd) gain, this antenna is optimized for long-distance VHF/UHF point-to-point links, telemetry, and mission-critical government communications. Its ruggedized construction and modular design ensure high survivability in extreme climates while maintaining logistical efficiency.
Precision Directional Focus
The AY-250 provides a sharp, directive signal with a 48-degree horizontal and 42-degree vertical beam-width. Combined with a 16 dB Front-to-Back Ratio, this allows system engineers to establish clean, high-intensity links while effectively rejecting co-channel interference and background noise from the rear and sides.
Innovative Feed and Matching
The unique design of the AY-250 utilizes a specialized matching feed system that acts as an internal impedance transformer. This eliminates the need for traditional folded dipoles, resulting in higher radiated efficiency and a stable VSWR of better than 1.5:1 across its 20 MHz bandwidth. The antenna is factory-tuned and requires no field adjustments, ensuring peak performance immediately upon installation.
Industrial-Grade Construction
Built for permanent outdoor installation, the antenna is constructed from high-quality 6063T6 ultra-corrosion-resistant architectural aluminum alloy. The use of a 25.4 mm square tube boom provides superior structural rigidity and torque resistance compared to round booms, ensuring the elements remain perfectly aligned even under high wind loads. For ease of logistics, elements are removable from the boom, allowing for a compact shipping profile.
Performance Summery
| Feature | Specification | Tactical Benefit |
|---|---|---|
| Gain | 13 dBi (11 dBd) | Superior reach for long-haul links. |
| Wind Rating | 200 Km/Hr | Stays operational in hurricane conditions. |
| Weight | 4 Kgs | Minimal stress on masts and tower loading. |
| Boom Type | Square Aluminum Tube | Prevents element rotation and alignment shift. |
Detailed Technical Features
- Strategic Gain: 13 dBi typical gain for superior link margin in the 250 MHz band.
- Optimized Bandwidth: Targeted 20 MHz bandwidth for high-fidelity data and voice transmission.
- Polarization Versatility: Can be mounted for either Vertical or Horizontal polarization.
- High Power Tolerance: Supports continuous RF power handling of up to 250 Watts.
- Directivity: Directional pattern minimizes multipath interference in complex topographies.
Detailed Mechanical Features
- Aviation Grade Materials: 25.4 mm square support boom and 12.7 mm radiating elements made from 6063T6 aluminum.
- Logistical Efficiency: Removable elements allow for a manageable 1.9-meter shipping length.
- Rapid Assembly: Designed to be assembled at the site with simple hand tools.
- Elite Fasteners: Supplied with Stainless Steel mounting hardware for masts up to 52 mm (2 inches).
- Termination: Industry-standard N-Female termination fixed directly to the driven element.
Detailed Environmental Features
- Hurricane Resilience: Wind survival rating of 200 Km/Hr (125 MPH).
- Thermal Hardening: Operational in extreme climates from -30°C to +70°C.
- Climate Defense: Anodized aluminum and square tube construction ensure decades of service in saline or industrial atmospheres.
- Humidity Tolerance: Certified for operation in 0 to 95% RH environments.
Key Advantages
- Factory-Tuned Precision: Zero field adjustments required; elements and matching are optimized at the factory for consistent reliability.
- Structural Rigidity: The square boom design prevents element rotation, maintaining precise electrical alignment over the antenna’s lifespan.
- Minimal Tower Loading: Lightweight 4 Kg design with small surface area reduces stress on tower infrastructure.
Primary Applications
- Point-to-Point VHF/UHF Links: Establishing reliable data backbones over medium-to-long distances.
- Military and Government Communications: Strategic directive links for secure fixed-station and ground-to-air nodes.
- Regional Telemetry: Reliable monitoring for utilities, oil, and gas infrastructure.
- Emergency Services: Directive high-gain antenna for public safety repeater networks.
Design Features: Antenna Experts Yagi antenna design reflects innovative modern antenna construction. The unique design of the AY-250 yagi antenna feed which works as matching device to keep the VSWR low resulting in increased efficiency of the yagi antenna. The mounting hardware supplied facilitates mounting on either vertical or horizontal members. The yagi antenna when packed comes with elements removed from the antenna boom for ease of packing and transportation. The small surface area of the yagi antenna minimizes wind resistance and conserves tower loading capacity.
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