One Watt 2.45 GHz Linear Amplifier


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[new-prox-amp]

Reversed PCB pattern  (6k PostScript)

Capacitors

Schematic Reference Value Description Package Supplier Supplier Part Number
C1 1 µF electrolytic, 10%, 16V SMT or leaded Digi-Key P2105-ND
C2, C3 1000 pF ceramic, X7R, 50V 0603 SMT Digi-Key PCC1772CT-ND
C4  Note 1 22 pF Johanson ceramic 5%, 100V 0504 SMT Newark 48F4909
C5  Note 1 3.3 pF ceramic, +/- 0.25 pF, 50V NP0 0402 SMT Digi-Key 311-1008-1-ND
C6  Note 1 2 pF ceramic, +/- 0.25 pF, 50V NP0 0402 SMT Digi-Key 311-1006-1-ND
C7  Note 1 1.8 pF ceramic, +/- 0.25 pF, 50V NP0 0402 SMT Digi-Key 311-1004-1-ND
C8  Note 1 1.6 pF ceramic, +/- 0.25 pF, 50V NP0 0402 SMT Digi-Key 311-1003-1-ND (1.5 pF)

Inductors

Schematic Reference Value Description Package Supplier Supplier Part Number
L1 4.7 nH 2% 0603 SMT Digi-Key PCD1290CT-ND
L2 31 ohm @ 100 MHz ferrite bead, IDC 500 mA 1206 SMT Digi-Key 240-1028-1-ND

Resistors

Schematic Reference Value Description Package Supplier Supplier Part Number
R1 2200 ohm film, 5% 0603 SMT Mouser 301-2.2k
R2 1000 ohm film, 5% 0603 SMT Mouser 301-1k

Integrated Circuits / Transistors

Schematic Reference Value Description Package Supplier Supplier Part Number
ICI RF2126 RF Micro Devices 1 Watt 2.4 GHz power amplifier SOP-8 Cracker Jack Box

Other

Schematic Reference Value Description Package Supplier Supplier Part Number
6 x 6 inch 1/32 inch double sided, 1 oz, FR-4 dielectric copper clad board Digi-Key PC45-S-ND
J1, J2 PCB mount SMA jacks Mouser 530-142-0701-801
0.020 inch silver solder Radio Shack 64-013

Notes

Part numbers are for reference only.  Alternate components may be substituted.

[1]  You can also use porcelain SMT capacitors which are available from American Technical Ceramics or Down East Microwave.

It's also possible to run the RF2126 at around 6.5 volts for slightly more power output. You could try a 7805 voltage regulator with two silicon diodes (or a red LED) in series with the ground lead (cathode to ground). Be sure to isolate the ground tab on the 7805 though or it won't work. You can even just use a plain old 7806 voltage regulator for 6 volts output.

Suppliers