2–13

MRF891 MRF891S

MOTOROLA RF DEVICE DATA

Figure 2. Output Power versus Input Power

Figure 3. Output Power versus Supply Voltage

Figure 4. Output Power versus Frequency

Figure 5. Typical Broadband Circuit Performance

Figure 6. Series Equivalent Input Impedance

Figure 7. Series Equivalent Output Impedance

8

0

Pin, INPUT POWER (WATTS)

7

0.1

VCC = 24 Vdc

6

5

44

3

22

1

0

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

900 MHz

960 MHz

850 MHz

8

Pin, INPUT POWER (WATTS)

6

4

2

8

VCC, SUPPLY VOLTAGE (VOLTS)

18

6

20

22

24

26

28

Pin = 1 W

f = 900 MHz

8

7

6

5

4

3

2

1

0

8

f, FREQUENCY (MHz)

850

875

900

925

950

Pin = 1 W

0.6 W

VCC = 24 Vdc

8

7

6

5

4

3

2

1

0

f, FREQUENCY (MHz)

850

875

900

925

950

Pin = 0.6 W

VCC = 24 Vdc

60%

50%

2.0:1

1.6:1

1.2:1

Pout

ηc

INPUT VSWR

0.2 W

0.6 W

0.2 W

f = 850 MHz

ZOL*

Zin

900

f = 850 MHz

960

900

960

Zo = 10 Ω

ZOL* = Conjugate of the optimum load

impedance into which the deviceoutput

operates at a given output power ,

voltage and frequency.

VCC = 24 Vdc, Pout = 5.0 W, Eff > 50%

f

MHz

ZOL*

Ohms

850

900

960

8.34 – j13.2

9.1 – j13.8

10.4 – j14.6

VCC = 24 Vdc, Pout = 5.0 W, Eff > 50%

f

MHz

Zin

Ohms

850

900

960

1.1 + j3.0

1.0 + j3.25

1.18 + j3.5