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Data Sheet ANT-916-PML
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 antennas 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.
VSWR
Reflected Power
3:1
2:1
1:1
25%
11%
0%
916MHz
1016MHz
816MHz
1.131
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相关PDF资料
ANT-916-PW-LP
ANTEN 916MHZ PRMNT 1/4 WAVE WHIP
ANT-916-PW-QW
ANTEN 916MHZ PRMNT 1/4 WAVE WHIP
ANT-916-PW-RA
ANT 916MHZ PRMNT SA 1/4 WAV WHIP
ANT-916-WRT-SMA
ANTENNA 916MHZ WRT SERIES SMA
ANT-916-YG5-N
ANTENNA YAGI 916MHZ 5-ELEMENT
ANT-DB1-HDP-TNC
ANTENNA DUAL HORZ 1/2WAVE TNC
ANT-DB1-LP-RM-01-N
ANTENNA LOG PERIODIC TRIPLE BAND
ANT-DB1-RAF-SMA
ANTENNA 5.8/2.4GHZ TILT SMA
相关代理商/技术参数
ANT-916-PML-UFL
功能描述:916MHz Whip, Tilt RF Antenna 881MHz ~ 951MHz -0.4dBi Connector, U.FL Connector Mount 制造商:linx technologies inc. 系列:- 包装:散装 零件状态:有效 频率组:UHF（300 MHz ~ 1 GHz） 频率（中心/带）:916MHz 频率范围:881MHz ~ 951MHz 天线类型:鞭状，倾斜 频带数:1 VSWR:1.9 回波损耗:- 增益:-0.4dBi 功率 - 最大值:- 特性:- 端接:连接器，U.FL 侵入防护:- 安装类型:连接器安装 高度（最大值）:5.917"（150.30 mm） 应用:- 标准包装:50
ANT-916-PW-LP
功能描述:天线 Perm Mnt Reducd Ht 1/4 Wave Whip 916MHz RoHS:否 制造商:Molex 技术类型:Cellular Antenna 频率: 带宽: 尺寸:106.7 mm L x 13 mm W
ANT-916-PW-QW
功能描述:天线 Permanent Mount 1/4 Wave Whip 916MHz
RoHS:否 制造商:Molex 技术类型:Cellular Antenna 频率: 带宽: 尺寸:106.7 mm L x 13 mm W
ANT-916-PW-QW-UFL
功能描述:916MHz Whip, Straight RF Antenna 865MHz ~ 965MHz 1.8dBi Connector, U.FL Panel Mount 制造商:linx technologies inc. 系列:PW 包装:托盘 零件状态:有效 频率组:UHF（300 MHz ~ 1 GHz） 频率（中心/带）:916MHz 频率范围:865MHz ~ 965MHz 天线类型:鞭状，直形 频带数:1 VSWR:1.9 回波损耗:- 增益:1.8dBi 功率 - 最大值:- 特性:- 端接:连接器，U.FL 侵入防护:- 安装类型:面板安装 高度（最大值）:3.150"（80.00mm） 应用:- 标准包装:50
ANT-916-PW-RA
功能描述:天线 Perm Mnt Swvl Angle 1/4 Wave Whip 916MHz
RoHS:否 制造商:Molex 技术类型:Cellular Antenna 频率: 带宽: 尺寸:106.7 mm L x 13 mm W
ANT-916-SP
功能描述:天线 SMD Planar Ant. 916MHz
RoHS:否 制造商:Molex 技术类型:Cellular Antenna 频率: 带宽: 尺寸:106.7 mm L x 13 mm W
ANT-916-SP_
功能描述:ANTENNA 916MHZ PLANAR (SMT) RoHS:是 类别:RF/IF 和 RFID >> RF 天线 系列:SP - Antenna Factor 标准包装:1 系列:*
ANT-916-USP
功能描述:天线 MicroSplatch Planar Antenna 916MHz, SMD
RoHS:否 制造商:Molex 技术类型:Cellular Antenna 频率: 带宽: 尺寸:106.7 mm L x 13 mm W