ANT-2.4-CW-QW Datasheet by Linx Technologies Inc.

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1 Revised 12/9/13
Product Description
CW Series ½-wave antennas deliver outstanding
performance in a rugged and cosmetically attractive
package. The internal ground reference reduces
dependance on an external ground plane. These
antennas are available with standard SMA or FCC
Part 15 compliant RP-SMA connectors. RP-SMA
connectors allow for easy field replacement while
complying with FCC requirements. A wide variety
of matching connectors permit numerous mounting
options.
Features
• Low cost
• Excellent performance
• Omni-directional pattern
• Wide bandwidth
• Very low VSWR
• Fully weatherized
• Flexible main shaft
• Rugged & damage-resistant
• SMA or Part 15 compliant RP-SMA connector
• Use with plastic or metal enclosures
Electrical Specifications
Center Frequency: 2.45GHz
Recom. Freq. Range: 2.35–2.60GHz
Wavelength: ½-wave
Peak Gain: 1.1dBi
VSWR: <1.9 typ. at center
Impedance: 50-ohms
Connector: RP-SMA or SMA
Oper. Temp. Range: –40°C to +90°C
Electrical specifications and plots measured on 10.16 cm x
10.16 cm (4.00" x 4.00") reference ground plane
ANT-2.4-CW-QW
Data Sheet by
Ordering Information
ANT-2.4-CW-QW-RPS (with RP-SMA connector)
ANT-2.4-CW-QW-SMA (with SMA connector)
Ø7.8 mm
(0.31”)
Ø5.7 mm
(0.22”)
13.5 mm
(0.53”)
105.0 mm
(4.13”)
5.0 mm
(0.20”)
1/4-36 UNS
14.5 mm
(0.57”)
AniennaFactor Llfix
2
by
Data Sheet ANT-2.4-CW-QW
VSWR Reflected Power
3:1
2:1
1:1
25%
11%
0%
2.45GHz 2.55GHz2.35GHz
1.545
VSWR Graph
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.
159 Ort Lane, Merlin, OR, US 97532
Phone: +1 541 471 6256
Fax: +1 541 471 6251
www.linxtechnologies.com

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