AN11024

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Application note

Rev. 1 — 24 March 2011

10 of 19

NXP Semiconductors

AN11024

SDARS active antenna 2nd stage LNA with BFU690, 2.33 GHz

6.2 Gain compression test

The network analyzer is set to CW mode: e.g. set to a single frequency, with power

sweep. Input power is swept from

25 dBm to +5 dBm at 2332.5 MHz. The amplifier

2.350

1.528

122.291

14.968

2.360

1.564

125.712

14.875

2.370

1.587

127.888

14.822

2.380

1.601

129.290

14.810

2.390

1.607

129.874

14.750

Table 5.

From Rohde & Schwarz FSU

Frequency list results

RF (GHz)

NF (dB)

Noise temp (K)

Gain (dB)

(1) Tr 3 b2/a1.1 LogM 10.00 dBm/0.00 dBm:

25.0000 dBm; 15.396 dB.

(2) Tr 3 b2/a1.1 LogM 10.00 dBm/ 0.00 dBm:

480.0000 mdBm; 14.432 dB.

(3) Tr 2 b2/1 LogM 10.00 dBm/ 0.00 dBm:

480.0000 mdBm; 13.902 dBm.

Fig 8.

Gain compression test plot

>Ch1: Start

-25.000 dBm

Stop

5.000 dBm

CW

2.33250

019aab744

-10.00

10.00

-30.00

30.00

50.00

-50.00

(3)

(2)

(1)