6

4510J–RKE–12/08

T5753

Figure 4-2.

Output Power Measurement at f = 315 MHz

Note:

For 345 MHz C

4.4

Application Circuit

For the blocking of the supply voltage a capacitor value of C

(see Figure 4-3 on page 7 and Figure 4-4 on page 8). C

antenna to the power amplifier where C

(18 pF + 27 pF in series); for C

erance value and to have the possibility to realize the Z

capacitors.

C

suppresses the 1

best suppression is achieved when C

ANT2.

The loop antenna should not exceed a width of 1.5 mm, otherwise the Q-factor of the loop

antenna is too high.

L

load resonance frequency of the crystal. Normally, a value of 12 pF results for a 15 pF

load-capacitance crystal.

1 nF

3.3 pF

56 nH

ANT2

ANT1

Power

meter

50

Ω

Z = 50

Ω