AY-350

The AY-350 is a professional-grade, high-gain directional UHF Yagi antenna engineered for the 300–400 MHz frequency range. Delivering a robust 13 dBi (11 dBd) gain, this antenna is optimized for long-distance point-to-point links, military ground-to-air communications, and mission-critical government infrastructure. Its ruggedized, tactical construction and specialized coastal hardening ensure high survivability in the most demanding operational theaters.

Precision Directional Focus

The AY-350 provides sharp, directive performance with a 56-degree horizontal and 45-degree vertical beam-width. Combined with an 18 dB Front-to-Back Ratio, it allows system engineers to establish 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-350 utilizes a specialized matching feed system that acts as an internal impedance transformer. This eliminates the need for traditional folded dipoles, which can introduce complexity and signal loss. The result is increased radiated efficiency and a stable VSWR of better than 1.5:1. The feed point radiator is protected within a ruggedized aluminum housing, providing a hermetic seal against severe environmental conditions.

Strategic Structural Hardening

Built for permanent outdoor installation, the antenna is constructed from high-quality 6063T6 ultra-corrosion-resistant architectural anodized aluminum alloy. For additional defense in coastal or saline environments, the entire array features a high-quality epoxy-based powder coating in tactical Olive Green. The radiating elements are permanently welded to the square support boom, ensuring that electrical alignment remains perfect even under high vibration or heavy wind loads.

Performance Summery

Detailed Technical Features

• Strategic Gain: 13 dBi typical gain for superior link margin in the UHF band.
• Optimized Bandwidth: Factory-tuned for a 25 MHz segment within the 300–400 MHz range.
• 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.
• Square Boom Rigidity: Prevents element rotation and maintains precision alignment under wind load.
• Marine Grade Hardware: Supplied with Type 316 Stainless Steel mounting hardware for masts up to 52 mm (2 inches).
• Tactical Finish: Olive Green military-grade coating for UV protection and concealment.
• Logistics: Pre-assembled for rapid deployment; overall length of 1.6 meters.

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.
• Coastal Defense: Epoxy powder coating and 316 stainless hardware prevent oxidation in saline or industrial atmospheres.
• Humidity Tolerance: Certified for operation in 0 to 95% RH environments.

Key Advantages

• "Plug-and-Play" Reliability: Factory-welded elements and pre-tuned matching eliminate field assembly errors.
• Superior Corrosion Resistance: Marine-grade stainless steel and epoxy coating ensure a long service life in salt-spray environments.
• Minimal Tower Loading: Small surface area and low-drag design conserve tower capacity and reduce structural stress.

Primary Applications

• Military & Defense Communications: Strategic directive links for secure fixed-station and ground-to-air nodes.
• UHF Point-to-Point Links: Establishing reliable data backbones over medium-to-long distances.
• Coastal Monitoring: Strategic high-gain antenna for port authority and maritime security.
• Government Infrastructure: Reliable long-range connectivity for public safety and emergency services.

Design Features: Antenna Experts Yagi antenna design reflects innovative modern antenna construction. The unique design of the 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 comes in pre-assembled condition with permanently fixed elements in the support boom. The small surface area on the yagi antenna minimizes wind resistance and conserves tower loading capacity.

Constructions: Radiating elements, supporting booms and adjoining metal castings of AY-350 yagi antenna have been constructed in high quality 6063T6 aluminum alloys to prevent corrosion. The yagi antenna uses special feed which eliminates the use of folded dipole. The Yagi antenna is supplied with N termination fixed on the driven element. The feed point radiator is enclosed in a Nylon housing designed to protect against severe environmental conditions and minimize pattern distortion. This directional yagi antenna comes factory tuned and does not require any field adjustment.