MH303
Cellular-Band Quad-FET Mixer
Product Information
Product Features
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+28 dBm IIP3
RF 820 – 920 MHz
IF 20 – 100 MHz
ISO & EPC compliant
Low-side LO configuration
+13 dBm LO Drive Level
High L-I & L-R Isolation (>38 dB)
Product Description
The MH303 is a passive Quad-MOSFET mixer that
provides high dynamic range performance in a low cost
3x3 mm 6-pin DFN (Dual Flat No-Lead) lead-
free/green/RoHS-compliant package.
WJ’s MH303 uses patented techniques to realize +28
dBm Input IP3 at an LO drive level of +13 dBm when
used in a simple application circuit with a low-side LO
configuration. The LO can also be driven with higher
power levels up +20 dBm to achieve higher IP3
performance. This mixer integrates internal circuitry to
provide single-ended interfaces for the RF & LO ports.
Typical applications include frequency up/down
conversion, modulation and demodulation for receivers
and transmitters used in various current and next
generation RFID technologies such as EPC, ISO, ETSI,
and ANSI. Their small size makes them ideal for
PCMCIA applications.
Functional Diagram
IF1
1
6
IF2
GND
2
5
GND
LO
3
4
RF
MH303
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6-pin 3x3 mm DFN
lead-free/
green/RoHS-compliant
Package
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No External Bias Required
Function
IF Differential Input
LO port
RF port
IF differential Input
Ground
Pin No.
1
3
4
6
2, 5
Applications
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RFID: UHF
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Readers
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Industrial
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Portable
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Handheld
Specifications
Parameters
RF Frequency Range
LO Frequency Range
IF Frequency Range
SSB Conversion Loss
Input IP3
Input IP3
Input IP3
Input 1 dB Compression Point
Noise Figure
LO Input Drive Level
LO-RF Isolation
LO-IF Isolation
Return Loss: RF Port
Return Loss: LO Port
Return Loss: IF Port
1.
2.
3.
4.
5.
Units
MHz
MHz
MHz
dB
dBm
dBm
dBm
dBm
dB
dBm
dB
dB
dB
dB
dB
Minimum
820
720
20
+26
+27
+26
Typical
Maximum Comments
920
900
100
8.0
35
40
70
7.5
+27
+28
+27
+17.5
8
+13
38
44
18
12
10
See note 2
See note 3
RF = 820 MHz, See note 4
RF = 870 MHz, See note 4
RF = 920 MHz, See note 4
See note 5
LO freq = 750 – 850 MHz
LO freq = 750 – 850 MHz
Data was taken using an application board in a 50
Ω
system, with a low side LO at +13 dBm in a downconverting application at 25°C with an IF frequency = 70 MHz.
An IF frequency of 70 MHz is a nominal frequency. The IF frequency can be specified by the user within the constraints of the specified minimum and maximum RF and LO frequency range.
The conversion loss includes the loss of an IF transformer (M/A COM ETC1-1-13, nominal loss 0.7 dB at 70 MHz).
Input IP3 is measured with two tones with an input power of +3 dBm / tone separated by 1 MHz.
Although the input P1dB level is much higher, the continuous RF input power should not exceed +12 dBm. Operation above +12 dBm may cause permanent damage.
Absolute Maximum Ratings
Parameters
Operating Case Temperature
Storage Temperature
LO Input Power
RF Input Power
Ordering Information
Part No.
MH303
MH303-G
MH303-PCB
Rating
-40° to +85° C
-40° to +125° C
+20 dBm
+12 dBm
Description
Cellular-band Quad-FET Mixer
(lead-tin plated pins)
Cellular-band Quad-FET Mixer
(lead-free/green/RoHS-compliant Package)
Fully -Assembled MH303 Application Board
Operation of this device above any of these parameters may cause permanent damage.
Specifications and infor mation are subject to change without notice
WJ Communications, Inc
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Phone 1-800- WJ1-4401
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FAX: 408-577-6621
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e- mail: sales@wj.com
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Web site: www.wj.com
October 2004
WJCI [ WJ COMMUNICATION. INC. ]
