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PDF IAM-91563 Data sheet ( Hoja de datos )

Número de pieza IAM-91563
Descripción 0.8-6 GHz 3V Downconverter
Fabricantes Agilent(Hewlett-Packard) 
Logotipo Agilent(Hewlett-Packard) Logotipo



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0.8 – 6 GHz 3 V Downconverter
Technical Data
IAM-91563
Features
• +0 dBm Input IP3 at 1.9 GHz
• Single +3V Supply
• 8.5 dB SSB Noise Figure at
1.9 GHz
• 9.0 dB Conversion Gain at
1.9 GHz
• Ultra-miniature Package
Applications
• Downconverter for PCS,
PHS, ISM, WLL, and other
Wireless Applications
Surface Mount Package
SOT-363 (SC-70)
Pin Connections and
Package Marking
LO 1
GND 2
6 IF and Vd
5 GND
RF 3
4 SOURCE
BYPASS
Simplified Schematic
LO
1
RF
3
Note:
1. Package marking provides orienta-
tion and identification.
IF and Vd
6
SOURCE
BYPASS
4
GROUND
2, 5
7-135
Description
Hewlett-Packard’s IAM-91563 is an
economical 3V GaAs MMIC mixer
used for frequency down-conver-
sion. RF frequency coverage is
from 0.8 to 6 GHz and IF coverage
is from 50 to 700 MHz. Packaged
in the SOT-363 package, this
4.0␣ sq. mm. package requires half
the board space of a SOT-143 and
only 15% the board space of an
SO-8 package.
At 1.9 GHz, the IAM-91563 pro-
vides 9 dB of conversion gain,
thus eliminating an RF or IF gain
stage normally needed with a
lossy mixer. LO drive power is
nominally only -5 dBm, eliminat-
ing an LO buffer amplifier. The
8.5 dB noise figure is low enough
to allow the system to use a low
cost LNA. The -6 dBm Input IP3
provides adequate system linearity
for most commercial applications,
but is adjustable to 0 dBm.
The circuit uses GaAs PHEMT
technology with proven reliability,
and uniformity. The MMIC
consists of a cascode FET struc-
ture that provides unbalanced gm
modulation type mixing. An on-
chip LO buffer amp drives the
mixer while bias circuitry allows a
single +3V supply (through a
choked IF port). The LO port is
internally matched to 50 . The
RF and IF ports are high imped-
ance and require external match-
ing networks.
5965-9973E

1 page




IAM-91563 pdf
IAM-91563 Typical Reflection Coefficients, TC = 25°C, ZO = 50 , Vd = 3 V
Frequency (GHz) RF (Mag) RF (Ang) LO (Mag) LO (Ang) IF (Mag)
0.1 0.43 -1 0.64
0.2 0.39 -6 0.63
0.3 0.39 -8 0.63
0.4 0.39 -9 0.63
0.5 0.39 -10 0.62
0.6 0.39 -11 0.62
0.7 0.40 -14 0.62
0.8
0.91 -18
0.39 -14
0.9
0.91 -21
0.39 -16
1
0.91 -23
0.38 -17
1.1
0.92 -25
0.39 -17
1.2
0.91 -28
0.39 -19
1.3
0.88 -29
0.40 -22
1.4
0.87 -32
0.39 -22
1.5
0.85 -33
0.39 -24
1.6
0.84 -34
0.39 -25
1.7
0.83 -35
0.39 -26
1.8
0.82 -37
0.39 -27
1.9
0.82 -37
0.38 -29
2
0.81 -39
0.39 -29
2.1
0.81 -40
0.38 -31
2.2
0.81 -41
0.38 -31
2.3
0.81 -42
0.37 -32
2.4
0.81 -44
0.37 -33
2.5
0.80 -45
0.36 -34
2.6
0.80 -45
0.36 -35
2.7
0.81 -46
0.35 -36
2.8
0.81 -48
0.35 -36
2.9
0.81 -50
0.34 -37
3
0.82 -51
0.34 -37
3.1
0.83 -53
0.33 -38
3.2
0.83 -55
0.33 -39
3.3
0.83 -56
0.32 -39
3.4
0.85 -59
0.32 -40
3.5
0.86 -61
0.31 -40
3.6
0.87 -64
0.32 -42
3.7
0.85 -67
0.31 -42
3.8
0.83 -71
0.30 -45
3.9
0.83 -71
0.30 -43
4
0.82 -73
0.29 -46
4.1
0.83 -76
0.29 -45
4.2
0.83 -79
0.28 -47
4.3
0.84 -82
0.29 -48
4.4
0.84 -85
0.27 -49
4.5
0.84 -87
0.28 -50
4.6
0.85 -91
0.26 -51
4.7
0.84 -95
0.28 -52
4.8
0.85 -97
0.25 -52
4.9
0.85 -100
0.27 -54
5
0.85 -103
0.25 -54
5.1
0.86 -106
0.27 -57
5.2
0.85 -108
0.25 -56
5.3
0.84 -113
0.27 -58
5.4
0.84 -115
0.25 -58
5.5
0.84 -117
0.27 -61
5.6
0.83 -121
0.25 -61
5.7
0.83 -123
0.27 -64
5.8
0.81 -125
0.25 -65
5.9
0.81 -128
0.26 -67
6
0.80 -130
0.24 -65
7-139
IF (Ang)
-8
-9
-10
-10
-11
-12
-13

5 Page





IAM-91563 arduino
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.
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
RFC
Value
0.5 pF
9 pF
100 pF
500 pF
(not used)
100 nH
8.2 nH
Zo=90
l = 0.41 in.
320 nH
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 HP Touchstone®
may be used to fully analyze and
account for these circuit
variables.
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 Vd 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
LO
C7
RF L3
C1
L1
H
C2
L2 C4
RFC
C5
C3
IF
MUN 1
IAM-91
C6
Figure 32. Complete 1.9 GHz Mixer.
+V
The following performance was measured for a 1.9 GHz circuit:
Measured results:
Conversion Gain = 9.0 dB
SSB Noise Figure = 8.5 dB
P1dB (output) = -8.1 dB
IP3 (Input) = -7 dBm
Operating conditions:
RF Frequency = 1.89 GHz
LO Frequency = 1.78 GHz
IF Frequency = 110 MHz
7-145
LO-RF Isolation = 17 dB
LO-IF Isolation = 34 dB
RF-IF Isolation = 23 dB
LO Drive Level = -5 dBm
DC Power = 3.0V @ 9 mA

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