HMC259
MICROWAVE CORPORATION
GaAs MMIC SUB-HARMONICALLY PUMPED MIXER 28 - 40 GHz
FEBRUARY 2001
Features
General Description
The HMC259 chip is a broadband sub-harmoni-
cally pumped (x2) balanced MMIC passive mixer
which can be used as an upconverter or
downconverter. Thechiputilizesa GaAsMESFET
process resulting in a small overall chip area of
1.9mm2. This chip has a very wide IF bandwidth
of DC-13 GHz. The 2LO to RF isolation is
excellent eliminating the need for additional fil-
tering . This mixer chip is designed to be used in
38GHz point to point radios, Local Multi-Point
Distribution Systems (LMDS), and SATCOM ap-
plications. All data is with the chip in a 50 ohm test
fixture connected via 0.025 mm (1 mil) diameter
wire bonds of minimal length <0.31 mm (<12
mils). This device is a much smaller and more
reliable replacement to hybrid diode mixer de-
signs.
SUB-HARMONICALLYPUMPED(x2)LO
HIGH 2LO/RF ISOLATION: > 35dB
SMALL SIZE: 1.24mm x 1.55mm
IDEAL FOR 38 GHz RADIOS, E1 & T1
4
Guaranteed Performance*, LO Drive=+15dBm, - 55 to + 85 deg C
IF = 1 GHz
IF = 1 GHz
Parameter
Units
Min.
Typ.
28 - 40
14 - 20
DC - 12
14
Max.
Min.
Typ.
36 - 40
18 - 20
DC - 4
12
Max.
Frequency Range, RF
Frequency Range LO
Frequency Range, IF
Conversion Loss
GHz
GHz
GHz
dB
17
17
15
15
Noise Figure (SSB)
2 LO to RF Isolation
2 LO to IF Isolation
RF to IF Isolation
14
12
dB
28
58
25
10
2
35
40
63
25
12
2
50
dB
65
68
dB
30
32
dB
LO to IF Isolation
15
17
dB
IP3 (Input)
5
6
dBm
dBm
dBm
1 dB Compression (Input)
Local Oscillator Drive Level
* Configured as a downconverter
-7
-4
-7
-1
+13
+15
+18
+13
+15
+18
12 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
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