ANT-2.4-CW-RCT-xx
Data Sheet
Product Description
The RCT Series ½-wave antenna delivers
outstanding performance with an innovative
articulating base that allows it to tilt 90° and rotate
360° for optimum orientation. The antenna’s
internal counterpoise eliminates external ground
plane dependence and maximizes performance.
The RCT attaches via a standard SMA or Part 15
compliant RP-SMA connector
by
10.0 mm
(0.39")
Features
•
•
•
•
•
•
•
•
Internal counterpoise
Tilts and rotates
Excellent performance
Omni-directional pattern
Very low VSWR
Fully weatherized
Rugged and damage-resistant
Standard SMA or Part 15 compliant RP-SMA
connector
113.0 mm
(4.44")
95.6 mm
(3.76")
8.4 mm
(0.33")
9.0 mm
(0.35")
5.1 mm
(0.20")
Electrical Specifications
Center Frequency:
Recom. Freq. Range:
Wavelength:
VSWR:
Peak Gain:
Impedance:
Connector:
Oper. Temp. Range:
2.45GHz
2.40–2.50GHz
½-wave
≤
1.9 typical at center
2.2dBi
50-ohms
RP-SMA
–40°C to +90°C
28.0 mm
(1.10")
Electrical specifications and plots measured on 10.16 cm x
10.16 cm (4.00" x 4.00") reference ground plane
Ordering Information
ANT-2.4-CW-RCT-RP (with RP-SMA connector)
ANT-2.4-CW-RCT-SS (with SMA connector)
–
1
–
Revised 1/13/14
VSWR Graph
VSWR
3:1
1.003
Reflected Power
25%
2:1
11%
1:1
2350MHz
2450MHz
0%
2550MHz
What is VSWR?
The Voltage Standing Wave Ratio (VSWR) is a measurement of how well
an antenna is matched to a source impedance, typically 50-ohms. It is
calculated by measuring the voltage wave that is headed toward the load
versus the voltage wave that is reflected back from the load. A perfect
match will have a VSWR of 1:1. The higher the first number, the worse the
match, and the more inefficient the system. Since a perfect match cannot
ever be obtained, some benchmark for performance needs to be set. In
the case of antenna VSWR, this is usually 2:1. At this point, 88.9% of the
energy sent to the antenna by the transmitter is radiated into free space
and 11.1% is either reflected back into the source or lost as heat on
the structure of the antenna. In the other direction, 88.9% of the energy
recovered by the antenna is transferred into the receiver. As a side note,
since the “:1” is always implied, many data sheets will remove it and just
display the first number.
How to Read a VSWR Graph
VSWR is usually displayed graphically versus frequency. The lowest point
on the graph is the antenna’s operational center frequency. In most cases,
this will be different than the designed center frequency due to fabrication
tolerances. The VSWR at that point denotes how close to 50-ohms the
antenna gets. Linx specifies the recommended bandwidth as the range
where the typical antenna VSWR is less than 2:1.
–2
–
Data Sheet ANT-2.4-CW-RCT-xx
by
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