| 摘要 |
<p>An electron tube for achieving high power at high frequency with high efficiency, including an input coupler (50), a ribbon-shaped electron beam (25) and a traveling wave output coupler (20). The input coupler (50) is a lumped constant resonant circuit that modulates a field emitter array cathode (60) at microwave frequency. A bunched ribbon electron beam (25) is emitted from the cathode (60) in periodic bursts at the desired frequency. The beam has a ribbon configuration to eliminate limitations inherent in round beam devices. The traveling wave coupler (20) efficiently extracts energy from the electron beam (25), and includes a waveguide (40) with a slot therethrough for receiving the electron beam (25). The ribbon beam (25) is tilted at an angle with respect to the traveling wave coupler (20) so that the electron beam couples in-phase with the traveling wave in the waveguide (40). The traveling wave coupler (20) thus extracts energy from the electron beam (25) over the entire width of the beam.</p> |
