RF Section Layout help , network side

[Trishool]

Hi,
Attach is the placement for 1206 Resistors for ateunaton . Please review if its OK to place this way . OR should I orient the Resistors right angled to the modules Antenna o/p port? will use a microstrip to feed till antenna .




Thanks
Ts

 

[biff44]

1206 is a little large for RF. Are you dissipating a lot of power? If not, maybe an 0603 would work better. Definitely if you are above 2 Ghz!

Make sure that the R28 has a good via hole to the ground plane, and that that ground plane is well attached to the RF IC's ground (no ground plane cuts between the two).

Angling the resistors has not effect on RF performance. If you are stuffing the board with a robot in production, it would be better to not angle them. If the antenna is some distance away, make sure the microstrip line leading up to it is the right width for 50 ohms, and that it has a ground plane underneath it (ground plane, once again, having good connection to the RF IC).

Rich

 

[Trishool]

1206 is a little large for RF. Are you dissipating a lot of power? If not, maybe an 0603 would work better. Definitely if you are above 2 Ghz!

Make sure that the R28 has a good via hole to the ground plane, and that that ground plane is well attached to the RF IC's ground (no ground plane cuts between the two).

Angling the resistors has not effect on RF performance. If you are stuffing the board with a robot in production, it would be better to not angle them. If the antenna is some distance away, make sure the microstrip line leading up to it is the right width for 50 ohms, and that it has a ground plane underneath it (ground plane, once again, having good connection to the RF IC).

Rich

Thanks for the exact reply , could you please help me with the bending of this microstrip (right angle is said not to be a good practice), how is the curvature calculated , though my frequency is too low 433MHz.

-Ts