BIG SIGNAL 22BS-70
Maximum Directional Performance on 432 MHz / 70 cm
The BIG SIGNAL 22BS-70 represents the highest-performance model in our 432 MHz / 70 cm Cubical Quad lineup. With 22 full-wave elements, it is BIG SIGNAL's largest antenna for this band, designed for stations demanding high gain, outstanding directivity, and maximum weak-signal capability.
Its architecture based on closed full-wave loop elements delivers outstanding performance while maintaining a relatively compact boom length for an antenna in this class. This makes it an excellent choice for UHF DX, long-distance communications, tropospheric propagation, and weak-signal operation.
Band: 432 MHz / 70 cm
Configuration: Directional Cubical Quad
Elements: 22 full-wave elements
Polarization: Horizontal
Key Feature: High gain and directivity
Recommended Use: DX / Tropo / weak-signal / contesting / long-distance communications
Why Choose the BIG SIGNAL 22BS-70?
• 22 elements to take 70 cm performance to the next level
The 22BS-70 was developed for operators looking for maximum performance from our 432 MHz lineup. Its 22 elements provide high gain and a highly directional radiation pattern for working weak signals and long-distance paths.
• Full-wave closed-loop elements
Unlike conventional Yagi configurations, the Cubical Quad uses full-wave loop elements. This architecture makes it possible to develop highly efficient antennas with excellent performance for UHF communications.
• High gain with an optimized structure
The 22BS-70 is engineered to deliver high gain while keeping boom length optimized, providing an excellent balance between physical size and overall performance.
• Outstanding weak-signal performance
The combination of gain, directivity, and closed-loop elements makes the 22BS-70 especially well suited to applications where every dB matters: UHF DX, tropospheric propagation, contesting, and reception of signals close to the noise floor.
• Excellent signal-to-noise performance
The closed-loop geometry of its elements can help reduce pickup from certain types of electrical noise and interference commonly found in urban environments, helping provide cleaner reception of weak signals.
• High directivity and selectivity
Its directional radiation pattern helps focus RF energy toward the desired direction while increasing rejection from other directions, a particularly useful advantage when dealing with nearby signals, interference, or stations located at different azimuths.
• Improved stability with polarization changes
The characteristic behavior of a Cubical Quad can be especially useful when signals experience polarization changes and fading, helping maintain more stable reception under changing propagation conditions.
• Simplified assembly
Despite being a 22-element antenna, the system is designed for straightforward assembly using preassembled elements, reducing the time required to prepare the antenna for installation.
Designed for When Every dB Counts
At 432 MHz, system losses and weak signal levels can make even small improvements in performance significant. The BIG SIGNAL 22BS-70 is specifically designed for stations where gain and directivity are top priorities.
It is especially well suited for operators focused on terrestrial DX, tropospheric propagation, contesting, and weak-signal communications who want to extract maximum performance from their 70 cm station.
22 Elements. Maximum Directivity. Built to Reach Farther.
BIG SIGNAL 22BS-70 – the flagship of our 432 MHz lineup for stations looking to take UHF performance to the highest level.
Technical Specifications
Frequency Range: 430–440 MHz / 70 cm
Elements: 22 (long-spacing configuration)
Gain: 18.2 dBi (Free Space)
Front-to-Back Ratio: 27.02 dB
SWR: 1.1:1–1.3:1
Impedance: 50 Ohms
Maximum Power: 5,000 W PEP
Boom Length: 5.67 m / 18.60 ft
Turning Radius: 2.5 m / 8.20 ft
Overall Height: 0.175 m / 6.89 in
Weight: 5 kg / 11.02 lb
Wind Survival: > 200 km/h / 124 mph
Wind Load: 0.054 m² / 0.58 ft² | 42.70 N / 9.60 lbf | @ 120 km/h / 75 mph
Construction & Materials
• Mast Mount
Heavy-duty clamp for masts up to 50 mm / 1.97 in in diameter, designed to provide a secure and stable installation.
• Boom
30 × 2 mm / 1.18 × 0.08 in square profile, engineered to provide the structural rigidity required for a 22-element antenna while keeping overall weight under control.
• Elements & Fiberglass System
8 × 4 mm / 0.31 × 0.16 in reinforced fiberglass tubing with UV protection, designed for long-term exposure to outdoor conditions.
• Hardware
Manufactured from W4 stainless steel for excellent corrosion resistance and long-term durability in outdoor installations.
• BIG SIGNAL Wire
Special copper wire with a polyethylene (PE) jacket, designed to provide excellent weather protection and high mechanical strength.
• Design & Optimization
Designed and optimized by EA1DDO Máximo.
• RF Connection
Equipped with an N-type connector.
18.2 dBi of Gain for Serious 70 cm Performance
With 22 elements, 18.2 dBi of free-space gain, and a 27.02 dB front-to-back ratio, the BIG SIGNAL 22BS-70 is engineered for high-performance 432 MHz stations where gain, directivity, and weak-signal capability are top priorities.
The purchase of the products is always made on request. We manufacture all products, so manufacturing times can be added. That is why the final price of the purchase, as the final price of the shipping costs will be confirmed in an email sent afterwards.
The form of payment will be made once the email is received, so at all times you can cancel the order informing us of the process.
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