GaAs Multiplier
Varactors
MA48700 Series
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacific: Tel. +81 (03) 3226-1671
s
Europe: Tel. +44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
1
Specifications Subject to Change Without Notice.
V3.00
q
q
Features
High Cutoff Frequency
Operating Temperatures From -65C to +200C
Description
The MA48700 series of Gallium Arsenide Abrupt Junction
Multiplier Varactors is specifically designed to provide
single state, high order multiplication at output frequen-
cies extending to approximately 100 GHz. All varactors in
this series are available in either package or chip form.
The cathode is the heat sink end of the package.
Applications
This series of Gallium Arsenide Multiplier Varactors is
intended for medium power harmonic generation with
high conversion efficiency. These diodes may be used to
double or triple the frequency output of a phase locked
source for millimeter wave radar and communication sys-
tems for local oscillators and transmitters.
Case Styles
(See appendix for complete dimensions)
30
92
94
95
120
126
128
166
GaAs Multiplier Varactors
MA48700 Series
V3.00
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacific: Tel. +81 (03) 3226-1671
s
Europe: Tel. +44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
2
Specifications Subject to Change Without Notice.
Electrical Characteristics
Notes:
1. Junction capacitance (C
j0
) is measured at 1 MHz and 0 volts on a
bridge which has been balanced with a shielded test holder con-
nected in place, but open circuited.
2. Cutoff frequency measurements (F
C0
) are made at 0 volts and
then extrapolated to -6 volts. See curve of Figure 1 showing typical
FC - 6 (cutoff at - 6 volts) versus FC0 (cutoff at 0 volts) perfor-
mance curve.
3. Available in the case styles 30, 92, 94, 95, 120, 126, 128 and 166.
When ordering, specify the case style by adding the case style
number as a suffix to the basic part number.
4. Nominal package parasitics (Cp and Ls) are given for each case
style with the outline drawing in the appendix section.
Electrical Specifications
@ 25C
Absolute Maximum Ratings
@ 25C
Zero Bias1
Suggested
Minimum Junction
Cut-off
Frequency2
Output Frequency
Model3
Voltage Rating
Capacitance
(fc) at -6 Volts
Range
Number
(Volts)
(pF)
(GHz)
(GHz)
MA48701E
15
0.150 - 0.250
550
20 - 50
MA48702E
15
0.250 - 0.350
500
20 - 40
MA48703E
15
0.350 - 0.450
450
15 - 30
MA48704E
15
0.450 - 0.550
400
15 - 30
MA48705E
15
0.550 - 0.650
400
10 - 20
MA48706C
25
0.150 - 0.250
400
20 - 40
MA48707C
25
0.250 - 0.350
350
15 - 35
MA48708C
25
0.350 - 0.450
300
15 - 30
Parameter Absolute
Maximum
Temperature
Storage
-65C to +250C
Operating
-65C to +200C
Voltage
Voltage Rating
GaAs Multiplier Varactors
MA48700 Series
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacific: Tel. +81 (03) 3226-1671
s
Europe: Tel. +44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
3
Specifications Subject to Change Without Notice.
V3.00
RELATIONSHIP BETWEEN CUTOFF FREQUENCY AT
ZERO AND SIX VOLTS IN GAAS VARACTOR DIODES
Typical Performance Curves
THEORETICAL EFFICIENCY OF X2 GAAS
VARACTOR MULTIPLIERS
THEORETICAL EFFICIENCY OF X3 GAAS
VARACTOR MULTIPLIERS
THEORETICAL EFFICIENCY OF X4 GAAS
VARACTOR MULTIPLIERS
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