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參數(shù)資料
型號(hào): ANT-DB1-RMT-TNC
廠商: Linx Technologies Inc
文件頁數(shù): 2/2頁
文件大小: 342K
描述: ANTENNA DUAL-BAND ROOF MNT TNC
標(biāo)準(zhǔn)包裝: 1
天線類型: 鞭狀
頻帶數(shù)目: 2
頻率: 860 ~ 960MHz,1.8GHz
VSWR: 1.5
端子: RP-TNC
安裝類型: 底座安裝
高度(最大): 3.69"(93.7mm)
包裝: 散裝
 2 
by
Data Sheet ANT-DB1-RMT-xxx
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
25%
11%
1.791
1.354
  CENTER 868.000MHz
  CENTER 1 800.000MHz
SPAN 200.000MHz
相關(guān)PDF資料
PDF描述
ANT-DB1-VDP-TNC ANTENNA TRIPPLE BAND VERT TNC
ANT-ELE-S01-005 ELEMENT WHIP FOR MAG-1 BASES
ANT-ELE-S01-006 ELEMENT WHIP HI GAIN MAG-1 BASES
ANT-ELE-S01-008 ELEMENT WHIP DUAL BAND MAG1 BASE
ANT-ELE-S01-010 ELEMENT WHIP SHORT FOR MAG1 BASE
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