Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
1
Specifications subject to change without notice. 2/00A
3343 GHz GaAs MMIC
Double Balanced Down Converter Mixer
Features
I Low Conversion Loss, 6.5 dB
I Insensitive to LO Power Variations
I Low LO Power Requirement, 9 dBm
I High LO to RF Isolation, 30 dB
I No DC Bias Required
Description
Alpha's double balanced GaAs Schottky diode mixer has
a typical conversion loss of 6.5 dB at an LO power level
as low as 9 dBm over the band 3343 GHz. The chip uses
Alpha's proven Schottky diode technology, and is based
upon MBE layers for the highest uniformity and
repeatability. The diodes employ surface passivation to
ensure a rugged, reliable part with through-substrate via
holes and gold-based backside metallization to facilitate
an epoxy die attach process. All chips are screened for
DC diode parameters and lot samples are RF measured
to guarantee performance.
Dimensions indicated in mm.
All pads are
0.07 mm wide.
Chip thickness = 0.1 mm.
Chip Outline
Parameter
Symbol
Min.
Typ.
2
Max.
Unit
RF and LO Frequency Range
F
RF
, F
LO
3343
GHz
IF Frequency Range
F
IF
05
GHz
LO Power Level
P
LO
921
dBm
Conversion Loss
1
L
C
6.5
dB
RF and LO Return Loss
1
RL
RF
, RL
LO
18
dB
LO to RF Isolation
1
ISO
LO-RF
30
dB
LO to IF Isolation
1
ISO
LO-IF
25
dB
RF Input 1 dB Compression Point
1
P
1 dB
7
dBm
Two Parallel Diode Series Resistance
R
S
1.5
Electrical Specifications at 25C
1
2
3
50 OHMS
50 OHMS
50 OHMS
50 OHMS
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
0.000
0.000
1.785
1.258
2.010
0.951
0.085
0.085
0.889
0.490
Absolute Maximum Ratings
Characteristic
Value
Operating Temperature
-55C to +125C
Storage Temperature
-65C to +150C
Total Input Power (RF + LO)
23 dBm
AM038D1-00
1. Not measured on a 100% basis.
2. Typical represents the median parameter value across the specified
frequency range for the median chip.
3343 GHz GaAs MMIC Double Balanced Down Converter Mixer
AM038D1-00
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
Specifications subject to change without notice. 2/00A
4
6
8
10
12
14
16
18
Performance vs. LO Power
F
RF
= 38 GHz, F
LO
= 37 GHz, P
RF
= -10 dBm
4
6
8
10
12
14
LO Power (dBm)
Conversion Loss (dB)
0
10
20
30
40
50
Return Loss & Isolation (dB)
Conversion Loss
LO Return Loss
LO to RF Isolation
LO to IF Isolation
0
1
2
3
4
10
8
9
7
6
5
Performance vs. IF Frequency
F
RF
= 38 GHz, F
LO
= F
RF
- F
IF
, P
LO
= 9 dBm
4
6
8
10
12
14
IF Frequency (GHz)
Conversion Loss (dB)
1
2
3
50 OHMS
50 OHMS
50 OHMS
50 OHMS
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
RF
IF
LO
1
2
3
50 OHMS
50 OHMS
50 OHMS
50 OHMS
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92
RF
IF
LO
90 Phase Shifter/Splitter
LO
IF
RF
31
32
33
34
35
39
38
37
36
Performance vs. LO Frequency
F
RF
= F
LO
+ 1 GHz, P
LO
= 9 dBm
4
6
8
10
12
14
LO Frequency (GHz)
Conversion Loss (dB)
0
10
20
30
40
50
Return Loss & Isolation (dB)
Conversion Loss
LO Return Loss
LO to RF Isolation
LO to IF Isolation
Typical Performance Data
Wire Bonding Configurations
Circuit Schematic
Single IF bond configuration.
Requires two IF bonds.
LO to IF isolation is degraded by 7 dB for this configuration.
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