User's Manual

Swarm ½ Wave Antenna
Parameter
Value
Length
108.5 cm
Diameter (Connector)
40.65 mm
Diameter (along major length)
3.3 mm
Weight
150g
Operating Temperature
-60 °C to +60 °C
Operating Humidity
0-100% humidity, condensable
Impedance
50 Ohms nominal
Polarization
Linearly Polarized
VSWR (in Swarm Bands)
1.8
Frequency
137-138 and 148-150 MHz
Connector
NMO Female
Antenna Classification
Mobile, Fixed
Minimum separation distance from body
25cm
Table 8: Antenna characteristics for Swarm 1/2 wave Antenna
5.3 RF Interface Specifications
The RF interface requirements for the Tracker are summarized in Table 7 below.
Parameter
Value
Transmit Frequency Range
148-150 MHz
Receive Frequency Range
137-138 MHz
Duplexing method
Carrier Sense Multiple Access with Collision
Avoidance (CSMA/CA)
Input/output impedance
50 Ω
Table 7: General RF Parameters
17