rajo
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Hello
Regulars here could have been watching my path in designing my very first RF link. It took quite a long time (a few months, but doing some other stuff meanwhile), and I guess this is the final doubt.
So, the RF module is on the PCB. The external antenna connector is mounted on the chassis, and I want to connect the connector and the RF via mother board solder points, through a 50 Ohms coax.
I found a very interesting appnote from Wood and Douglas Limited, but there are some doubts I have to check on with experts before I pursue further.
Namely, from what I understand the track connecting RF module out pin and the RF feed solder point on the PCB should run over a groundplane. My question is: can I presume that this is the same groundplane which is used for eliminating the digital noise? Is the same ground plane used for radio and digital? Ot there are two (connected) groundplanes, one used for digital circuitry, and another for the radio?
In the same appnote they created a small ground plane paralel to the ground plane on the opposite side of the PCB. This groundplane is situated under RF module and the antenna connector (they use a PCB mounted connector, whereas I use soldering points). I think this is weird, since I believe these two paralel planes are not usual.
Thank you in advance for any clarification
Regulars here could have been watching my path in designing my very first RF link. It took quite a long time (a few months, but doing some other stuff meanwhile), and I guess this is the final doubt.
So, the RF module is on the PCB. The external antenna connector is mounted on the chassis, and I want to connect the connector and the RF via mother board solder points, through a 50 Ohms coax.
I found a very interesting appnote from Wood and Douglas Limited, but there are some doubts I have to check on with experts before I pursue further.
Namely, from what I understand the track connecting RF module out pin and the RF feed solder point on the PCB should run over a groundplane. My question is: can I presume that this is the same groundplane which is used for eliminating the digital noise? Is the same ground plane used for radio and digital? Ot there are two (connected) groundplanes, one used for digital circuitry, and another for the radio?
In the same appnote they created a small ground plane paralel to the ground plane on the opposite side of the PCB. This groundplane is situated under RF module and the antenna connector (they use a PCB mounted connector, whereas I use soldering points). I think this is weird, since I believe these two paralel planes are not usual.
Thank you in advance for any clarification