I have put together a circuit for the SWR meter, shown below. Click for full size. Two power measurement channels are shown. Top channel is for forward power and below that is the circuit for the reverse power. A small 78L05 linear regulator is also included. Each channel has an AD8307 logarithmic amplifier followed by an LM386 op amp unity gain follower. I plan to put the circuit in a well shielded enclosure. I have included surface mount bypass capacitors on the board, but I've also ordered some cabinet mount bypass capacitors from AliExpress.
No comments:
Post a Comment