3

MRF641

MOTOROLA RF DEVICE DATA

Figure 2. Power Output versus Power Input

Figure 3. Power Output versus Frequency

Figure 4. Power Output versus Supply Voltage

Figure 5. Power Saturation Profile

Figure 6. Series Equivalent Input–Output Impedance

VCC, SUPPLY VOLTAGE (VOLTS)

25

20

8

9

10

11

12

13

14

15

16

f = 470 MHz

Pin = 2 W

15

10

5

0

Pin = 3 W

VCC = 12.5 V

Pin, POWER INPUT (WATTS)

30

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

f = 470 MHz

VCC = 12.5 Vdc

27

24

21

18

15

12

9

6

3

0

f, FREQUENCY (MHz)

25

20

380

400

15

10

5

0

420

440

460

480

500

520

540

1 W

2 W

f = 470 MHz

VCC = 12.5 Vdc

Pin, POWER INPUT (WATTS)

30

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

27

24

21

18

15

12

9

6

3

0

Zin

0

2.0

1.0

3.0

4.0

ZOL*

2.0

4.0

6.0

8.0

10.

0

12.

0

10.

0

8.0

6.0

4.0

2.0

f = 400 MHz

420

450

480

510

f = 400 MHz

420

450

480

510

ZOL* = Conjugate of the load impedance into which the device output operates at a given power, η, and frequency.

Pout = 15 W, VCC = 12.5 V

f

MHz

Zin

Ohms

ZOL*

Ohms

400

420

450

480

510

0.6 + j4.0

0.7 + j4.2

1.0 + j5.0

1.2 + j5.2

1.7 + j6.4

3.5 – j1.2

3.4 – j0.8

3.0 + j0.5

2.7 + j1.2

2.6 + j1.6