This is my first ever RF PCB project and it'd be great to receive some guidance to make this project 'first-time-right'.
It's purpose is to transmit and receive signals at two different frequencies: 125khz and 315Mhz. To transmit and receive 315Mhz signals I used CC1101 chip modules and for 125Khz I used EM4095 chip IC. I am trying to implement 2-layer PCB due to lower costs compared to 4-layer PCB. I tried keeping top-layer for DC power lines and connections between ICs, while using bottom-layer for GND, although I was forced to route connections between CC1101 modules and ATMEGA via bottom-layer. This is my first PCB project and I'd like to make it 'first-time right', so any suggestions are welcomed! What did I do wrong and what should be improved? Here's project editor page: https://easyeda.com/editor#id=|cae05dd5d4744d7285097ac5ad078f11|a4b1ecae88b340f59224d628c10a1dfd
EDIT: I have encounted GND routing issues with few components on this PCB, which I fixed by adding solid copper plane to the board and those components seemed to connect with GND. Hovewer this didn't resolve grounding issues for CC1101 components, footprints for which I created myself: U10, U9 and U11. Anyone could offer advice with that? Cheers.