I am working on RF design and use CC115l IC for 433Mhz 50 ohm. now i want to get 436Mhz with same IC , so what necessary changes are required? like component value change, or add more components etc.
be aware that if you move off 433MHz to 436 MHz you are moving to a freq that requires licencing for use
and depending on your activities you may upset a lot of people that may result in legal action against you
As a starting point, consider that the balun components used in the reference design have at least 5% tolerance and are at best selected from an E24 (about 10% step) series. So the nominal balun center frequency can't be met better than 10 or 20 MHZ. Means there won't be a problem to use the 434 MHz band balun for a frequency slightly below or above.
Davenn's point of using a legal frequency range applies nervertheless.
if i use same components value for 433Mhz transmission freq then how can i get 436Mhz transmission freq?
and we need pcb antenna for 436Mhz so please suggest for it.
I am working on RF design and use CC115l IC for 433Mhz 50 ohm. now i want to get 436Mhz with same IC , so what necessary changes are required? like component value change, or add more components etc.
Calculation isn't easy, particularly for the balun, the method is basically discussed in a TI application note for the 2.4GHz chips, see the link here: https://www.edaboard.com/threads/333609/
But you don't need to calculate anything, you're fine with the 434 MHz values, as previously explained.