Lightweight whip antenna for general VHF applications - 21-4B
The 21-4 series of antennas are a linearly polarised, monopole antenna with wide band frequency characteristics intended for general communication and homing applications. Being of semi-rigid form, they are suitable for external fitting upon helicopters and fixed wing aircraft with a performance up to 350 kts EAS, and other similar applications. The 21-4 consists of a tapered glass fibre sleeve supporting a light aluminium alloy radiating element. The element assembly is fitted to a metal body carrying the coaxial connector. This arrangement allows the antenna to be installed by single hole fixing and allows orientation of the coaxial connector through 360°. The antenna can be mounted true or raked using the angled spacers provided
- Lightweight
- General Purpose
- Versatile fixing
- Wide range of bandwidth options
- TNC and BNC options available
Specifications
- Electrical Specs
- Mechanical Specs
- Standard Specs
Electrical Specs
- Minimum Frequency
- 118
- Maximum Frequency
- 152
- Impedence
- 50
- Return Loss VSWR
- <2.5:1
- Gain
- 2dBi (average)
- Polarization
- Vertical
- Radiation Pattern Azimuth
- Omnidirectional
- Radiation Pattern Elevation
- Peak Power Watts
- Average Power Watts
- 35
Mechanical Specs
- Full Dimensions LxWxH mm
- 562mm high
- Height Above Base Plate mm
- 558
- Mass kg
- 0.14
- Connector Type
- BNC Female, TNC Female
Standard Specs
- Altitude ft
- 25000
- Continuous Operating Temperature Min - C
- 40
- Continuous Operating Temperature Max C
- 70
- Vibration
- RTCA DO-160C, Section 8, Categories L and Y.
- Lightning
- Standards
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Get in touch
Fourth Avenue
Marlow
Buckinghamshire
SL7 1TF
United Kingdom
CAGE Code: U1907