It seems that Zeners could be used to just clip the steepest part of a sine wave and port that power to a Yagi tuned to resonate with the effective frequency.
Which is to say, put out a series of pulses, either pos or neg, zero as neg, 1 as pos. No carrier wave. No IF. No conventional AM/FM/VHF/ UHF tuner would pay any attention to it.
I like living in my neck of Ozark woods, but none of the commercially available long range wireless communication devices can penetrate the canopy. When the wavelength gets down to the length of pine needles, thru put is zero.
The 1/4 wavelength of 200 mhz is 37.5 cm, longer than any pine needles. Which seems like it could be turned into 200,000kbps, and even with error correction give me as much as my LAN port can handle.
But I would havta gate it with a mosfet or something. Then detect it on the other end. Zat reasonable?