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HIVE INF
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RCHIVE INFORMATION
4
RF Device Data
Freescale Semiconductor
MRF21085LR3 MRF21085LSR3
Figure 1. MRF21085L Test Circuit Schematic
RF
INPUT
RF
OUTPUT
Z1 Z2
VBIAS
C1
C6
L1
DUT
VSUPPLY
++
Z3
C8
Z7
C5
C7
Z5 Z6
R4
C4
Z4
+
C9
C3
C2
Z8
C10
C11
C12
+
B1
R1
R2
R3
Board 0.030″
Glass Teflon?,
Keene GX--0300--55--22,
εr
=2.55
PCB Etched Circuit Boards
MRF21085 Rev. 3, CMR
Z1 0.750″
x 0.084″
Microstrip
Z2 1.015″
x 0.084″
Microstrip
Z3 0.480″
x 0.800″
Microstrip
Z4 0.750″
x 0.050″
Microstrip
Z5 0.610″
x 0.800″
Microstrip
Z6 0.885″
x 0.084″
Microstrip
Z7 0.720″
x 0.084″
Microstrip
Z8 0.800″
x 0.070″
Microstrip
Table 5. MRF21085 Test Circuit Component Designations and Values
Designators
Description
B1
Short Ferrite Bead, Fair Rite, #2743019447
C1, C6
43 pF Chip Capacitors, ATC #100B430JCA500X
C2
10 pF Chip Capacitor, ATC #100B100JCA500X
C3, C9
1000 pF Chip Capacitors, ATC #100B102JCA500X
C4, C10
0.1
mF Chip Capacitors, Kemet #CDR33BX104AKWS
C5
1.0
mF Tantalum Chip Capacitor, Kemet #T491C105M050
C7
2.7 pF Chip Capacitor, ATC #100B2R7JCA500X
C8
10
mF Tantalum Chip Capacitor, Kemet #T495X106K035AS4394
C11, C12
22
mF Tantalum Chip Capacitors, Kemet #T491X226K035AS4394
L1
1 Turn, #20 AWG, 0.100″
ID
N1, N2
Type N Flange Mounts, Omni Spectra #3052--1648--10
R1
1.0 k?, 1/8 W Chip Resistor
R2
180 k?, 1/8 W Chip Resistor
R3, R4
10
?, 1/8 W Chip Resistors
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