2

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REV B

b) Passband Frequency Response

As shown in Figure 1, the typical gain of the WHM2535-12AE is 14.0 dB across 2.5 to 3.5 GHz. The typical

input and output return losses are 17 dB and 22 dB across the frequency of 2.5 to 3.5 GHz, respectively.

31 dBm in the frequency range of 2.5 to 3.5 GHz, respectively.

Figure 3 illustrates the measured noise figure performance at full temperature. The measured results include

the test fixture loss of approximately 0.10 dB. The noise figure is 1.0 dB (including 0.10 dB test fixture loss) across the

Figure 4 demonstrates the stability factor k of the amplifier.

Figure 5 is the block diagram of internal circuit of WHM2535-12AE. It is a one-stage amplifier with the DC

block capacitors at the input and output RF ports. All the RF matching networks, DC bias circuitries, and temperature

compensation circuits are integrated in.

Figure 6 demonstrates the application schematic diagram of WHM2535-12AE. It requires the external

decoupling capacitors C1 of 0.01 uF to build a LNA with WHM2535-12AE. C1 is to be as close to Pin 2 as possible.

This capacitor eliminates the parasitic. The +5V DC is applied at Pin 2. No DC block capacitor is required for both

input and output RF ports. The NC pins connected to ground are recommended. For +5V line trace length being longer

than 6 inch without a decoupling capacitor, an additional 0.01 ~ 0.1 uF de-coupling capacitor with minimum rating

voltage of 10V may be needed across the +5V line to ground. The capacitor must be rated in the temperature range of -

Figure 7 shows the mechanical outline and recommended motherboard layout of WHM2535-12AE. Plenty

of ground vias on the motherboard are essential for the RF grounding. The width of the 50-Ohm lines at the input and

output RF ports may be different for different property of the substrate.

FIG. 1 Typical small signal performance.

WHM2535-12AE Performance @ 25 C

-25

-20

-15

-10

-5

0

5

10

15

20

25

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

5.00

Freq (GHz)

S11

S21

S22

WHM2535-12AE IP3 and P1dB

0

5

10

15

20

25

30

35

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

Freq (GHz)

IP3 (dBm)

P1dB (dBm)