Communication-concepts FM-1KW Broadcast Application Note Manual de usuario descargar pdf (Pagina 2)

RF Reference Design Data

Freescale Semiconductor

MRFE6VP61K25H MRFE6VP61K25HS FM Broadcast

MEASUREMENTS

100

out

, OUTPUT POWER (WATTS)

Figure 2. Continuous Wave Performance Graph

with Low Pass Filter versus Output Power

200 400 600 800 900 1000

, POWER GAIN (dB)

f = 108 MHz

Air--Cooled, CW, 87.5--108 MHz, Low Pass Filter



DRAIN EFFICIENCY (%)

1200

98 MHz

87.5 MHz

108 MHz

98 MHz

87.5 MHz

300 500 700 1100

=50V

= 200 mA

f, FREQUENCY (MHz)

Figure 3. Continuous Wave Performance Graph

with Low Pass Filter versus Frequency

88 92 96 100 102 104

, POWER GAIN (dB)



DRAIN EFFICIENCY (%)

11090 94 98 106

out

= 1100 W

=50V

= 200 mA



108



Air--Cooled, CW, 87.5--108 MHz, Low Pass Filter

Table 1. CW Drive--Up at 87.5 MHz

(W)

out

(W)

Gain

(dB)

IRL

(dB)

Eff

(%)

(V)

(A)

(1)

(A)

0.3 150 27.0 -- 6 . 1 33.6 50 8.9 0.2

0.5 314 28.0 -- 6 . 5 48.0 50 13.1 0.2

1.0 639 28.1 -- 8 . 1 65.8 50 19.4 0.2

1.5 844 27.5 --10.1 72.6 50 23.2 0.2

2.0 975 26.9 -- 1 1 . 9 76.1 50 25.6 0.2

2.5 1056 26.3 --13.0 78.1 50 27.0 0.2

3.0 1100 25.6 --13.3 79.1 50 27.8 0.2

3.5 1116 25.0 --13.6 79.2 50 28.2 0.2

Table 2. CW Drive--Up at 98 MHz

(W)

out

(W)

Gain

(dB)

IRL

(dB)

Eff

(%)

(V)

(A)

(1)

(A)

0.3 168 27.5 -- 1 1 . 0 36.8 50 9.1 0.2

0.5 343 28.4 -- 1 1 . 8 52.0 50 13.2 0.2

1.0 660 28.2 --14.9 68.5 50 19.3 0.2

1.5 864 27.6 --19.4 75.3 50 22.9 0.2

2.0 999 27.0 --22.4 78.7 50 25.4 0.2

2.5 1058 26.3 --22.0 80.1 50 26.4 0.2

3.0 1085 25.6 --22.0 80.2 50 27.0 0.2

3.5 1094 24.9 --22.6 80.4 50 27.2 0.2

Table 3. CW Drive--Up at 108 MHz

(W)

out

(W)

Gain

(dB)

IRL

(dB)

Eff

(%)

(V)

(A)

(1)

(A)

0.3 193 28.1 --14.2 40.9 50 9.4 0.2

0.5 377 28.8 --14.9 56.1 50 13.4 0.2

1.0 695 28.4 --15.6 72.9 50 19.1 0.2

1.5 881 27.7 --13.5 78.6 50 22.4 0.2

2.0 980 26.7 --14.1 79.2 50 22.9 0.2

2.5 1018 26.1 --12.2 81.6 50 24.9 0.2

3.0 1066 25.5 -- 1 1 . 8 82.4 50 25.9 0.2

3.5 1092 24.9 -- 1 1 . 8 82.7 50 26.4 0.2

1. I

is set by adjusting a variable gate--source voltage while maintaining a constant 50 volts at the drain.

1 2 3 4 5 6 7 ... 13 14

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Communication-concepts FM-1KW Broadcast Application Note Manual de usuario Pagina 2

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