35.0-45.0 GHz GaAs Receiver
SMT, 7x7 mm
January 2008 - Rev 24-Jan-08
R1008-QB
Features
Sub-harmonic, Image Reject Receiver
Integrated LNA, Image Reject Mixer, LO Doubler/Buffer
+2.0 dBm LO Drive Level
8.0 dB Conversion Gain
3.5 dB NF
+5.0 dBm Input Third Order Intercept (IIP3)
7x7mm SMT package
100% RF and DC Testing
General Description
Mimix Broadband’s 35.0-45.0 GHz packaged receiver has a
noise figure of 3.5 dB and 5.0 dBm Input Third Order
Intercept across the band. This device integrates a three
stage LNA followed by an image reject resistive pHEMT
mixer and includes an integrated LO doubler and buffer
amplifier. The use of integrated LO doubler and LO buffer
amplifier makes the provision of the LO easier than for
fundamental mixers at these frequencies. I and Q mixer
outputs are provided and an external 90 degree hybrid is
required to select the desired sideband. The device comes
in a 7x7mm SMT package that is RoHS compliant. This
device is well suited for Millimeter-wave Point-to-Point
Radio, LMDS, SATCOM and VSAT applications.
Absolute Maximum Ratings
Supply Voltage (Vd)
Supply Current (Id)
Gate Bias Voltage (Vg)
Input Power (Pin)
Storage Temperature (Tstg)
Operating Temperature (Ta)
Channel Temperature (Tch)
ESD - Human Body Model
ESD - Machine Body Model
+6.0 VDC
300 mA
+0.3 VDC
+5 dBm
-65 to +165 deg C
-55 to MTTF Table
1
MTTF Table
1
Class 1A
Class M1
(1) Channel temperature affects a device’s MTTF. It is
recommended to keep channel temperature as low as
possible for maximum life
Electrical Characteristics (Ambient Temperature T = 25
o
C)
Parameter
Frequency Range (RF)
Frequency Range (LO)
Frequency Range (IF)
Input Return Loss RF (S11)
Small Signal Conversion Gain RF/IF (S21)
LO Input Drive (P
LO
)
Image Rejection
Noise Figure (NF)
Isolation LO/RF @ LOx1/LOx2
Input Third Order Intercept (IIP3)
Input 1 dB Compression (IP1dB)
Drain Bias Voltage (Vd)
Gate Bias Voltage (Vg1,2)
Supply Current (Id) (Vd=4.0, Vg=-0.5V Typical)
Units
GHz
GHz
GHz
dB
dB
dBm
dBc
dB
dB
dBm
dBm
VDC
VDC
mA
Min.
35.0
16.0
DC
-
-
-
-
-
-
-
-
-
-1.2
-
Typ.
-
-
-
10.0
8.0
+2.0
20.0
3.5
+5.0
-5.0
+4.0
-0.5
180
40.0/40.0
Max.
45.0
24.0
4.0
-
-
-
-
-
-
-
-
+5.5
+0.1
240
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 1 of 7
Characteristic Data and Specifications are subject to change without notice.
©2008
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
35.0-45.0 GHz GaAs Receiver
SMT, 7x7 mm
January 2008 - Rev 24-Jan-08
R1008-QB
XR1008-QB: USB Conv. Gain and Image Rej. Vs Freq.
Vd=4V, Id=180mA, P_LO=+2dBm
20
15
Con.Gain(dB) and IR (dBc)
10
5
0
-5
-10
-15
-20
-25
-30
35
36
37
38
39
40
41
RF (GHz) [IF=2GHz]
42
43
44
45
Gain
IR
Measurements
XR1008-QB: LSB Conv. Gain and Image Rej. Vs Freq.
Vd=4V, Id=180mA, P_LO=+2dBm
20
15
Con.Gain(dB) and IR (dBc)
10
5
0
-5
-10
-15
-20
-25
-30
35
36
37
38
39
40
41
RF (GHz) [IF=2GHz]
42
43
44
45
Gain
IR
XR1008-QB: Noise Figure (dB) vs Freq (GHz)
Vd=4V, Id=180mA, P_LO=+4dBm
10.0
9.0
8.0
7.0
NF(dB)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
35
36
37
38
39
40
RF (GHz) [IF=2GHz]
USB
LSB
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 2 of 7
Characteristic Data and Specifications are subject to change without notice.
©2008
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
35.0-45.0 GHz GaAs Receiver
SMT, 7x7 mm
January 2008 - Rev 24-Jan-08
R1008-QB
Physical Dimensions
QB
- MSL, Gross Leak Test Compliant
(Note: Engineering designator is 40REC0770)
Functional Schematic
VD
28
27
GND IF1
26
25
GND
24
23
22
Pin Designations
Pin
Number
3
4
5
21
Pin Name
GND
RF IN
GND
VG1
Pin Function
Ground
RF Input
Ground
LNA, LO Amp
Nominal
Value
Remarks
1
2
GND
RF IN
GND
3
4
5
6
7
180
LNA
Image
Reject
Mixer
LO
Buffer
8
20
19
x2
-0.5 V
GND
LO IN
GND
9
10
11
12
17
18
19
24
25
26
27
All other
pins
VG2
GND
IF2
GND
GND
LO IN
GND
GND
IF1
GND
VD
NC
Mixer, Doubler
Ground
IF2 Output
Ground
Ground
LO Input
Ground
Ground
IF1 Output
Ground
Drain Bias
Not
Connected
-0.5 V
Adjust VG1 for drain
current (Id) = 180 mA.
VG1 has an input
impedance of 180 .
VG2 requires a fixed
voltage and has a high
input impedance > 1 M
18
17
16
15
+ 2 dBm
in
>
1
+ 4.0 V
8
VG1
9
10
11
IF2
12
GND
13
14
VG2 GND
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 3 of 7
Characteristic Data and Specifications are subject to change without notice.
©2008
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
35.0-45.0 GHz GaAs Receiver
SMT, 7x7 mm
January 2008 - Rev 24-Jan-08
R1008-QB
Recommended Layout
App Note [1] Biasing
- Please refer to the functional block diagram and pin-out table for biasing information. The device is operated by
biasing VD=4.0V with ID=180 mA by adjusting the applied voltage on VG1. VG1 typically requires-0.5V to result in the drain current being
180mA. The nominal input impedance of this gate is 180Ohm, so it should be noted that the nominal gate current will be 2.7mA.
Additionally, a fixed bias of VG2=-0.5V is required to bias the mixer and doubler. Adjusting VG2 above or below this value can adversely affect
conversion gain, image rejection and intercept point performance. It is recommended to use active biasing to keep the currents constant as
the RF power and temperature vary; this gives the most reproducible results. The diagram “Active Bias Circuit” demonstrates a possible
method for active biasing. Depending on the supply voltage available and the power dissipation constraints, the bias circuit may be a single
transistor or a low power operational amplifier, with a low value resistor in series with the drain supply used to sense the current. The gate of
the pHEMT is controlled to maintain correct drain current and thus drain voltage. Typically the gate is protected with Silicon diodes to limit
the applied voltage. Also, make sure to sequence the applied voltage to ensure negative gate bias is available before applying the positive
drain supply
Active Bias Circuit
5.0V
5k76
5R62 (sense)
4V, 180mA
3
Vd
100n
4.0V
1
MMBT3904
1
MMBT3906
10R
3
12k1
12k1
100R
2
2
-5.0V
1k0
Vg1
2
1
100n
3
3
BAV99
BAV99
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Characteristic Data and Specifications are subject to change without notice.
©2008
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
1
2
Page 4 of 7
35.0-45.0 GHz GaAs Receiver
SMT, 7x7 mm
January 2008 - Rev 24-Jan-08
R1008-QB
MTTF
MTTF is calculated from accelerated life-time data of single devices and assumes an isothermal back-plate.
MTTF (yrs) vs. Backplate Temperature (°C)
1.E+05
1.E+04
MTTF (Years)
1.E+03
1.E+02
1.E+01
1.E+00
55
65
75
Temperature (°C)
85
95
Bias Conditions:
Vd=4.0V, Id=180 mA
Typical Application
RF IN
37.0-39.5 GHz
XR1008-QB
Coupler
BPF
IF Out
2 GHz
LNA
IR Mixer
Buffer
AGC Control
X2
LO(+2.0dBm)
17.5-18.75 GHz (USB Operation)
19.5-20.75 GHz (LSB Operation)
Mimix Broadband MMIC-based 35.0-45.0 GHz Receiver Block Diagram
(Changing LO and IF frequencies as required allows design to operate as high as 46 GHz)
Mimix Broadband's 30.0-46.0 GHz XR1008-QB GaAs MMIC Receiver can be used in saturated radio applications and linear modulation
schemes up to 128 QAM.
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 5 of 7
Characteristic Data and Specifications are subject to change without notice.
©2008
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
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