To echo other's responses, anyone answering would need a LOT more information on what you are trying to do and EXACTLY which part you are using. The first step is the datasheet and/or manufacturer's website. Perhaps this is the part you are referring to?
I would suggest, based on your question, starting with a complete module with an interface you are familiar with. The above part indicates an SDIO interface, which (I think) is not documented without paying a substantial membership fee.
Try a WiFi module with a built in antenna and an RS232, SPI, or I2C interface might be a much better place for you to start.
RF Design is such a huge field of study and design techniques that it would be virtually impossible for anyone to determine what you are trying to know.
Based on the information given, try using google with "WiFi PCB design" and read some manufacturer's guidelines.