GaN Wideband Power Amplifier, 28 V, 5 W

20 - 2700 MHz

Rev. V3

NPA1008

4

4

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4

Parts measured on evaluation board (20-mil thick

RO4350). The PCB’s electrical and thermal ground

is provided using a standard-plated densely packed

via hole array (see recommended via pattern).

Matching is provided using a combination of

lumped elements and transmission lines as shown

in the simplified schematic above. Recommended

tuning solution component placement, transmission

lines, and details are shown on the next page.

Description

Turning the device ON

4. Apply RF power to desired level.

Turning the device OFF

1. Turn the RF power off.

Bias Sequencing

Recommended Via Pattern (All dimensions shown as inches)

Evaluation Board and Recommended Tuning Solution

20 - 2700 MHz Broadband Circuit

C3

10

mF

NPA1008

C2

2400 pF

RF

Out

C1

2400 pF

RF

In

R1

470 W

L4

1.5 nH

L3

2.2 nH

C8

0.6 pF

C4

4.7

mF

L2

0.9

mH

C6

0.8 pF

C5

0.6 pF

C7

0.5 pF

C9

1000 pF

L1

0.9

mH