參數(shù)資料
型號(hào)： MAX2016
廠商： Maxim Integrated Products, Inc.
英文描述： LF-to-2.5GHz Dual Logarithmic Detector/ Controller for Power, Gain, and VSWR Measurements
中文描述： LF至2.5GHz、雙路對(duì)數(shù)檢測(cè)器/控制器，用于功率、增益和VSWR測(cè)量
文件頁(yè)數(shù)： 12/19頁(yè)
文件大?。?/td> 405K
代理商： MAX2016
M
LF-to-2.5GHz Dual Logarithmic Detector/
Controller for Power, Gain, and VSWR Measurements
12
______________________________________________________________________________________
Measuring VSWR and Return Loss
In Figure 2, the two logarithmic amplifiers measure the
incident and the reflected power levels to produce two
proportional output voltages at OUTA and OUTB. Since
OUTD is a DC voltage proportional to the difference of
OUTA and OUTB, return loss (RL) and VSWR can be
easily calculated within a microprocessor using the
following relationships:
where return loss (RL) is expressed in decibels,
V
CENTER
is the output voltage (typically 1V) when
P
RFINA
= P
RFINB
, and SLOPE is typically equal to
25mV/dB (for R3 = 0
).
RL
P
P
V
V
SLOPE
RFINA
RFINB
OUTD
CENTER
=
=
(
)
MAX2016
CSETL
COUTL
V
REF
LOGARITHMIC
DETECTOR
LOGARITHMIC
DETECTOR
COUTL
OUTD
SETD
20k
RFINB
RFINA
OUTD
TRANSMITTER
COUPLER
CIRCULATOR
ATTENUATOR
GND
Figure 1. VSWR Monitoring Configuation
MAX2016
RFINA
RFINB
GND
ADC
μ
P
IN
LOAD
4-PORT DIRECTIONAL
COUPLER
LOGARITHMIC
DETECTOR
LOGARITHMIC
DETECTOR
OUTD
SETD
20k
Figure 2. Measuring Return Loss and VSWR of a Given Load
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MAX2016ETI 功能描述:射頻檢測(cè)器 LF-2.5GHz Dual Log Detector/Controller RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 頻率范圍:650 MHz to 3 GHz 最大二極管電容: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SC-88 封裝:Reel
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