ANT-916-CW-HWR-RPS

## **ANT-916-CW-HWR-ccc Data Sheet** 

## Product Description 

HWR Series ½-wave center-fed dipole antennas deliver outstanding performance in a rugged and cosmetically attractive package. The articulating base allows the antenna to tilt 90 degrees and rotate 360 degrees. The antenna’s internal counterpoise eliminates external ground plane dependence and maximizes performance. HWR Series antennas attach via a standard SMA or Part 15 compliant RP-SMA connector. Custom colors and connectors are available for volume OEM customers. 

## Features 

connector 

e Custom colors and terminations for volume 

OEMs 

Center Frequency: 916MHz Recom. Freq. Range: 900–930MHz Bandwidth: 30MHz Wavelength: ½-wave VSWR: < 2.0 typical Peak Gain: 1.2dBi Impedance: 50-ohms Connection: RP-SMA or SMA Oper. Temp. Range: –30°C to +80°C 

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8.2 mm<br>(0.32")<br>> | <<<br>116 mm<br>(4.57")<br>142 mm<br>(5.59")<br>A 26 mm<br>rm a (1.02")<br>a 10 mm o e <> 30 mm<br>(0.39") (1.18")<br>**----- End of picture text -----**<br>


## Ordering Information 

ANT-916-CW-HWR-RPS (with RP-SMA connector) ANT-916-CW-HWR-SMA (with SMA connector) 

10.16 cm (4.00” x 4.00”) reference ground plane 

Revised 8/1/2017 

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## VSWR Graph 

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VSWR 1.282 Reflected Power<br>3:1 25%<br>2:1 11%<br>1:1 0%<br>816MHz 916MHz 1016MHz<br>**----- End of picture text -----**<br>


## 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 has 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 is 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. 

Copyright © 2017 Linx Technologies 

159 Ort Lane, Merlin, OR 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 www.linxtechnologies.com 

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