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參數(shù)資料
| 型號： | IAM-91563 |
| 英文描述： | 0.8-6 GHz 3V Downconverter(0.8-6 GHz 3V，下變頻器) |
| 中文描述： | 0.8-6 GHz的3V的變頻器（0.8-6 GHz的3V的，下變頻器） |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 144K |
| 代理商： | IAM-91563 |
11
from the table of Reflection
Coefficients. Capacitor C7 is a DC
block for the LO port.
DC bias is applied to the
IAM-91563 through the RFC at the
IF Output pin. The power supply
is bypassed to ground with
capacitor C5 to keep RF, IF, and
LO signals off of the DC bias lines
and to prevent gain dips or peaks
in the response of the mixer. C4 is
a DC blocking capacitor for the
output.
The values of the RF bypass
capacitors and DC blocking
capacitors that are not part of a
impedance matching structure
(i.e., C3 - C7) should be chosen to
provide a small reactance (typi-
cally < 5 ohms) at the lowest
frequency at the port for which
they are used. The reactance of
the RF choke (RFC) should be
high (e.g., several hundred ohms)
at the lowest IF.
The completed 1.9 GHz mixer
from the design example above
with all components and SMA
connectors in place is shown in
Figure 32. Again, L1 is not used
and is replaced by a metal tab.
The length of the shunt transmis-
sion line, MLIN, is adjustable by
moving the position of the short-
ing tab between the line and the
ground pad. Provision is made for
an additional bypass capacitor,
C6, to be added to the bias line
near the V
d
connection to elimi-
nate unwanted RF feedback
through bias lines.
When multiple bypass capacitors
are used, consideration should be
given to potential resonances. It is
important to ensure that the
capacitors, when combined with
additional parasitic L’s and C’s on
the circuit board, do not form
resonant circuits. The addition of
a small value resistor in the bias
supply line between bypass
capacitors will often “de-Q” the
bias circuit and eliminate reso-
nance effects.
Table 1 below summarizes the
component values for the 1.9 GHz
design.
Component
C1
C2
C3, C5, C7
C4
L1
L2
L3
MLIN
Value
0.5 pF
9 pF
100 pF
500 pF
(not used)
100 nH
8.2 nH
Z
o
=90
l = 0.41 in.
320 nH
RFC
Table 1. Component Values for
1.9 GHz Downconverter.
The values shown in Table 1 may
vary from those used above to
describe the basic impedance
matching approach. The final
component values take into
consideration additional effects
such as, the various line lengths
between components, parasitics
in components (e.g., the series
inductance in C1), as well as
other circuit parasitics. A CAD
program such as Agilent Touch-
stone
may be used to fully
analyze and account for these
circuit variables.
RF
IF
+V
C6
C5
C4
C2
C3
MUN 1
L 1
C 1
C 7
L3
L2
RFC
LO
IAM-91
Figure 32. Complete 1.9 GHz Mixer.
The following performance was measured for a 1.9 GHz circuit:
Measured results:
Conversion Gain = 9.0 dB
SSB Noise Figure = 8.5 dB
P
1dB
(output) = -8.1 dB
IP
3
(Input) = -7 dBm
LO-RF Isolation = 17 dB
LO-IF Isolation = 34 dB
RF-IF Isolation = 23 dB
Operating conditions:
RF Frequency = 1.89 GHz
LO Frequency = 1.78 GHz
IF Frequency = 110 MHz
LO Drive Level = -5 dBm
DC Power = 3.0V @ 9 mA
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IAM-91563-BLK | 制造商:Avago Technologies 功能描述:IC,Downconverter,GAAS,TSSOP,6PIN,PLASTIC |
| IAM-91563-BLKG | 功能描述:上下轉(zhuǎn)換器 3 SV 9 dB RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| IAM-91563-TR1 | 制造商:AGILENT 制造商全稱:AGILENT 功能描述:0.8-6 GHz 3V Downconverter |
| IAM-91563-TR1G | 功能描述:上下轉(zhuǎn)換器 3 SV 9 dB RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| IAM-91563-TR2G | 功能描述:上下轉(zhuǎn)換器 3 SV 9 dB RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
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