50 OHM APPLICATION CIRCUIT: 40--800 MHz
VSUPPLY
R1
RF
INPUT
Z1
Z2
C1
L1
DUT
Z3
VCC
C3
C4
Z4
Z5
C2
Z6
C5
RF
OUTPUT
Z1 0.347 x 0.058 Microstrip
Z2 0.575 x 0.058 Microstrip
Z3 0.172 x 0.058 Microstrip
Z4 0.403 x 0.058 Microstrip
Z5
Z6
PCB
0.286 x 0.058 Microstrip
0.061 x 0.058 Microstrip
Getek Grade ML200C, 0.031, r = 4.1
Figure 14. 50 Ohm Test Circuit Schematic
30
S21
20
10
0
S22
--10
R1
C4
C3
L1
C1
C2
C5
--20
--30
0
S11
200
400
VCC = 6.2 Vdc
600
800
f, FREQUENCY (MHz)
Figure 15. S21, S11 and S22 versus Frequency
MMG30XX
Rev 2
Figure 16. 50 Ohm Test Circuit Component Layout
Table 8. 50 Ohm Test Circuit Component Designations and Values
Part
Description
Part Number
Manufacturer
C1, C2, C4
0.01 F Chip Capacitors
C0603C103J5RAC
Kemet
C3
68 pF Chip Capacitor
C0805C680J5RAC
Kemet
C5 (1)
2.7 pF Chip Capacitor
12105J2R7BS
AVX
L1
470 nH Chip Inductor
BK2125HM471--T
Taiyo Yuden
R1
7.5 Ω Chip Resistor
RK73B2ATTE7R5J
KOA Speer
1. Tuning capacitor: Capacitor value and location on the transmission line are varied for different frequencies.
Table 9. Supply Voltage versus R1 Values
Supply Voltage
7
8
9
10
11
12
V
R1 Value
4.4
10
15.6
21
27
32
Note: To provide VCC = 6.2 Vdc and ICC = 180 mA at the device.
RF Device Data
Freescale Semiconductor, Inc.
MMG3003NT1
5