The work in progress layout is as shown below:
We are using a 4 layer PCB with top layer for signal, inner 1 layer for GND, inner 2 layer for power and bottom layer for signal. The antenna would be mounted on bottom layer.
Questions I have are
- Is it better to use a microstrip or a co-planar wave guide or a co-planar wave guide with ground plane to connect the antenna with a 50 Ohm line from the GSM module?
- For a near omni directional antenna pattern, what should the copper pour look like around the antenna in the various layers? Should I cover the entire PCB with copper pour or should I cover only near the line connecting the antenna? If later, to how much distance from the line connecting the antenna?
- For Q1, which calculator would you recommend I use for figuring out the line width?
- In these calculators the height from GND plane would be the distance between the top layer and the first inner layer with GND plane according to the stack-up, right?