WJ Company HMJ4 Datasheet
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 applications 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
Absolute Maximum Ratings
Parameter Rating
Operating Case Temperature -40 to +85°C
Storage Temperature -65 to +100°C
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 25˚C.
The Communications Edge
™
18 17 16 15 14 13 12 11 10
123456789
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
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
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