BlueBird VL23 Quadrifilar Antenna 220-400 MHz
The quadrifilar helix antenna (QHA) with right-hand circular polarization (RHCP) in the 220-400 MHz range is a professional solution for electronic warfare (EW) systems and other specialized applications. The VL23 model provides stable circular polarization and an almost quasi-spherical radiation pattern with predominant coverage of the upper hemisphere, making it optimal for working with aerial targets: UAVs, aircraft, helicopters, and other moving objects. The name indicates the operating band segment of 220-400 MHz, while the nominal frequency range stated in the technical specifications covers 210-600 MHz.
Description and Purpose
The VL23 antenna is designed for applications where stable circular polarization and wide bandwidth are critical. Thanks to the thoughtful geometry of its elements and the use of aluminum as a structural material, the antenna withstands operation in harsh climatic conditions at temperatures from -40°C to +80°C. The maximum input power is up to 120 W, impedance is 50 Ohm, and the connector is N-type (female), ensuring easy integration with industrial transceivers. The design combines compact dimensions and moderate weight (about 4 kg), simplifying the installation, maintenance, and transportation of EW systems.
Advantages
- Circular polarization (RHCP) — ensures resistance to target orientation changes and reduces the impact of multipath effects;
- Wide operating band 220–400 MHz (with a nominal range of 210–600 MHz) — versatility for various surveillance and countermeasures systems;
- Quasi-spherical radiation pattern — uniform coverage in the upper hemisphere, important for detecting and tracking aerial objects;
- Durable aluminum construction — longevity, reduced corrosion, and operational reliability in field conditions;
- Compact dimensions and moderate weight (~4 kg) — ease of installation and integration into mobile platforms.
Technical Specifications:
| Parameter | Value |
|---|---|
| Nominal Frequency Range | 210-600 MHz |
| Operating Band (SWR |
Additional key parameters specified in the description: RHCP circular polarization, 50 Ohm impedance, N-type (female) connector, maximum input power 120 W, operating temperature from -40°C to +80°C, construction material — aluminum, approximate weight ~4 kg. Purpose: EW systems, countermeasures and tracking of aerial targets, specialized military and industrial applications. Manufacturer: BlueBird. Product type: EW > Quadrifilar Antennas.
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