v02.1103
MICROWAVE CORPORATION
HMC256
GaAs MMIC I/Q MIXER
5.9 - 12 GHz
Features
High Image Rejection: >30 dB
Input IP3: +18 dB
Wideband IF: DC to 1.5 GHz
Small Size: 1.3 mm x 1.6 mm
Typical Applications
The HMC256 is ideal for:
• Microwave Radio & VSAT
• Test Instrumentation
• Military Radios Radar & ECM
• Space
Functional Diagram
General Description
The HMC256 chip is a compact, 2.08 mm
2
, I/Q
Mixer MMIC which can be used as an Image
Reject Mixer (IRM) or SSB upconverter. The
chip utilizes two standard Hittite double-balanced
mixer cells and a Lange Coupler realized in GaAs
MESFET technology. 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 <0.51
mm (<20 mils). A low frequency quadrature hybrid
was used to interface the MMIC IF ports to a 120
MHz IF USB output. This provides an example of
the I/Q Mixer in an IRM application. The IF may
be used from DC to 1.5 GHz. This I/Q Mixer is
a more reliable, much smaller replacement to
hybrid drop-in style I/Q Mixer assemblies.
5
MIXERS - CHIP
Electrical Specifications,
T
A
= +25° C, As an Image Reject Mixer
Parameter
Min.
Frequency Range, RF
Frequency Range, LO
Frequency Range, IF
Conversion Loss
Noise Figure (SSB)
Image Rejection (IR)
LO to RF Isolation
LO to IF Isolation
RF to IF Isolation
IP3 (Input)
1 dB Gain Compression (Input)
24
22
27
24
IF = 70 - 200 MHz
LO = +18 dBm
Typ.
5.9 - 12
5.7 - 12
DC - 1.5
8
8
32
30
35
30
18
5
10.5
10.5
20
22
27
24
Max.
Min.
IF = 70 - 200 MHz
LO = +15 dBm
Typ.
7.1 - 11.7
6.9 - 11.7
DC - 1.5
8
8
30
30
35
30
17
5
10.5
10.5
Max.
GHz
GHz
GHz
dB
dB
dB
dB
dB
dB
dBm
dBm
Units
5 - 32
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
HITTITE [ HITTITE MICROWAVE CORPORATION ]
