WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-433-5649 e-mail: sales@wj.com Web site: www.wj.com
September 2000
HMJ4
Product Description
The HMJ4 is a high dynamic range, GaAs FET
mixer. This active FET mixer realizes a typical
third order intercept point of +36 dBm at an
LO drive level of +17 dBm. The HMJ4 comes
in a low cost, J-lead package. Typical applica-
tions include frequency up/down conversion,
modulation and demodulation for receivers and
transmitters used in communications systems.
Product Features
+36 dBm IIP3
No External Matching Elements
Required
RF 1700-1880 MHz
LO 1550-1830 MHz
IF 50-150 MHz
+17 dBm Drive Level
+3V Bias (18 mA)
Low Cost Surface Mount J-Lead
Package
Functional Diagram
High Dynamic Range FET Mixer
18 17 16 15 14 13 12 11 10
1 2 3 4 5 6
7 8 9
Function Pin
No.
Ground
1
IF
2
Ground
3-7
+3V DC
8
Ground
9
Function Pin
No.
Ground
10
LO
11
Ground
12-16
RF
17
Ground
18
Absolute Maximum Ratings
Parameter
Rating
Operating Case Temperature
-40 to +85C
Storage Temperature
-65 to +100C
Maximum Input Power
25 dBm
1. Operation of this device above any of these parameters may cause permanent damage.
2. Total sum of LO port and RF port power should not exceed 25 dBm.
Ordering Information
Part No.
Description
HMJ4
High Dynamic Range FET Mixer
(Available in tape and reel)
HMJ4-PCB
Fully Assembled Application Circuit
Specifications
Parameter
Units
Minimum
Typical
Maximum
Condition
Frequency Range:
RF MHz
1700
1880
LO
MHz
1550
1830
IF
MHz
50
150
SSB Conversion Loss
dB
8.8
9.4
Noise Figure
dB
11
Isolation:
LO-RF
dB
18
34
LO-IF
dB
23
33
RF-IF
dB
14
IIP3
dBm
31
36
RF = 1800 MHz (0dBm)
Return Loss:
RF Port
dB
11
LO Port
dB
9
IF Port
dB
15
Input P1dB
dBm
23
LO Drive Level
dBm
17
DC Current at +3V Bias
mA
18
30
Test conditions unless otherwise stated: RF = 1800 MHz (-10 dBm), LO = 1700 MHz (17 dBm), IF = 100 MHz and 25C.
The Communications Edge
TM
WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-433-5649 e-mail: sales@wj.com Web site: www.wj.com
September 2000
HMJ4
1700
1750
1800
1850
1880
Conversion Loss vs. RF Frequency
IIP3 vs. RF Frequency
IF Return Loss vs. IF Frequency
LO Return Loss vs. LO Frequency
Isolation vs. LO Frequency
Isolation vs. RF Frequency
RF Frequency (MHz)
1700
1750
1800
1850
1880
50
45
40
35
30
IF = 50 MHz
Conversion Loss
RF Frequency (MHz)
5.0
7.5
10.0
12.5
15.0
IF = 50 MHz
LO Frequency (MHz)
1550
1600
1650
1700
1750
1830
Isolation (dB)
50
40
30
20
10
0
L-I
L-R
1800
RF Frequency (MHz)
Isolation (dB)
30
20
10
0
R-I
RF Return Loss (dBm)
RF Frequency (MHz)
LO Frequency (MHz)
LO Return Loss
1550
1600
1650
1700
1750
1800 1830
0
20
10
15
5
0
20
15
10
5
IF Frequency (MHz)
IF Return Loss (dB)
50
70
90
110
130
150
0
20
15
10
5
Input Intercept Point (dBm)
1700
1750
1800
1850
1880
1700
1750
1800
1850
1880
RF Return Loss vs. RF Frequency
IF = 150 MHz
IF = 100 MHz
IF = 150 MHz
IF = 100 MHz
Performance Charts
WJ Communications, Inc. Phone: 1-800-WJ1-4401 FAX: 408-433-5649 e-mail: sales@wj.com Web site: www.wj.com
September 2000
HMJ4
Specifications and information are subject to change without notice.
Caution! ESD sensitive device.
Outline Drawing
Land Pattern
Mounting Configuration
PDF 
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