CC430F5137: miniature helical PCB antenna for 868Mhz - MSP low-power microcontroller forum - MSP low-power microcontrollers - TI E2E support forums
![rf - Adjust a 868MHz PCB monopole antenna to work better at 915MHz - Electrical Engineering Stack Exchange rf - Adjust a 868MHz PCB monopole antenna to work better at 915MHz - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/UrWGH.png)
rf - Adjust a 868MHz PCB monopole antenna to work better at 915MHz - Electrical Engineering Stack Exchange
![RF Antenna Matching circuit and PCB design for 868 MHz SigFox device - Electrical Engineering Stack Exchange RF Antenna Matching circuit and PCB design for 868 MHz SigFox device - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/6lUFW.png)