Your post begs the question; Which came first: the Frequency (transmitter issue) or the Wavelength (antenna issue)?I want to have 50 mhz or 500 mhz emitted frequency, I know that the antenna has to be 1/2 1/4 of the wavelenght but i havent found about how you determine de circuit that you need, what frequency does the crystal oscillator frequncy has to be
while a physicist is happy if their calculations are accurate to within an order of magnitude, the same isn't true of techies and engineers. we like to get things pinned down a bit closer than that. the wavelength at 50Mhz is 6 meters, and the wavelength at 500Mhz is 60cm. there are a lot of users of the spectrum space between 50 and 500Mhz.I want to have 50 mhz or 500 mhz emitted frequency
I want to have 50 mhz or 500 mhz emitted frequency,
This begs the question...why is your transmit frequency going to be 50 MHz or 500 MHz?
well, it is important, since spectrum space is managed based on international treaties and agreements. countries follow those treaties and guidelines, and depending on the government, any given country can have rules that are almost nonexistent (a bare minimum to meet treaty obligations) to downright draconian (we detected an unauthorized transmission coming from your house at 0.5 microvolt per meter, so we're going to smash your equipment and put you in jail for 10 years), and everything in between. you may be in one of those places where radio is the "wild west" where they don't care unless you are interfering with government radio links. you really should try to find out first.... an as alec_t mentioned, if you are emitting harmonics or intermod on other frequencies than what you are allowed to use, that's usually treated as a violation of the rules in any country. emitting unwanted signals in the aero band in the US is what they usually double fines for when they catch somebody running an unlicensed FM radio station in the US.i dont have license , but the frequency is not important it doesnt have to be one which is regulated,