Very high frequency FET
So you want to drive a resonant circuit at 145MHz? Just do that, perhaps with a unity-gain buffer to provide power gain, at 0.5 watts. Using power = Freq * C * Vrms^2, you have C = power/(Freq * Vrms^2). With Vpeak of 1.6v, Vrms of 1.1v, the C = 0.5 / (145MHz * 1.1 * 1.1) = 3,000 picoFarad. Current will be (using P = I * V) = 0.5/1.1 = 0.4 amps at 3.3 volts peakpeak Power dissipation in such cases has the local power equaling the delivered power, or 0.4 watts.
Just use a class-C circuit, over groundplane, to convert the digital swing into a 0.5 watt output. Motorola/ONNN certainly sells such beasts, and has lots of application notes to guide you to success.
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This may help. Or not.
https://www.nxp.com/docs/en/application-note/AN282A.pdf