AN1526 Freescale Semiconductor / Motorola, AN1526 Datasheet - Page 11

• Manufacturer Part Number: AN1526
• Description: RF Power Device Impedances: Practical Considerations
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA SEMICONDUCTOR APPLICATION INFORMATION
Figure 22. Photograph of Break–Apart Test Fixture —
C1, C15 — 10 F, 25 V Tantalum
C2, C14 — 1000 pF, 350 V, Unelco
C3, C12 — 43 pF, 100 Mil, ATC Chip Capacitor
C5, C13 — 91 pF, Mini–Unelco
C4, C11 — 0.8 – 8 pF, Johansen Gigatrim 7290 Variable
C6 — 16 pF, Mini–Underwood
C7, C8, C9 — 12 pF, Mini–Underwood
C10 — 10 pF, Mini–Underwood
NOTE: C11
0.4 down Z3 from socket edge.
Fully Assembled
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 21. MRF873 Boardband Production
Go to: www.freescale.com
Test Fixture Schematic
Figure 23. Photograph of Break–Apart Test Fixture —
L1 — 13 Turn, #20 AWG Around 10 , 1/2 W, Resistor
L2, L5 — Ferroxcube Bead #56–590–85–38
L3, L4 — 4 Turns, #20 AWG Choke ID 0.2
L6 — 6 Turns, #20 AWG Choke ID 0.2
Z1, Z4 — 50 Ohm Microstrip
Z2 — 36 Ohm Microstrip /4 @ 838 MHz
Z3 — 26 Ohm Microstrip /4 @ 838 MHz
Board Material — 0.032 Glass Teflon 2 oz. Copper Clad
Setup for Impedance Measurements
r
11
= 2.55