21-4M VHF Whip Antenna
Product Description
The 21-4 antenna is a linearly polarized, monopole antenna with wide band frequency characteristics intended for general communication and homing applications. Being of semi-rigid form, it is suitable for external fitting upon helicopters and fixed wing aircraft with a performance up to 350 kts EAS, and other similar applications. Electrical design consists of a single broad band radiating element coupled via matching circuitry to a single coaxial connector. 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.
Features
- General purpose whip antenna
- Can be mounted straight or raked
- TNC and BNC options available
- Several bandwidth options available
Specifications
Weight:
140 g
Overall Length:
562 mm
Width of Body Base:
23.37 mm A/F
Diameter of Whip:
13.2 mm
Mounting:
Single hole self-fixing
Frequency Range:
118 MHz - 152 MHz
Impedance:
50 Ω (nominal)
VSWR:
≤ 2.5:1
Radiation:
Omnidirectional in azimuth (nominal)
As monopole in elevation (nominal)
Gain:
2 dBi (average)
Polarization:
Linear (vertical when mounted vertically)
Connector:
BNC Type Female
Operating Temperature:
-40°C to +70°C
Storage Temperature:
-55°C to +85°C
Altitude:
7620 m
Humidity:
Up to 95% RH up to 55%
Product Codes
- Mfr Part No:21-4M
- EDMO #:21-4M
- Brand:CHELTON
- Category:Antennas & Couplers