The dual-mode double-gap resonator with asymmetrrical strip line on the suspended ceramic substrate
A new dual-mode double-gap resonator on the basis of asymmetrical suspended stripline for miniature klystron type microwave tubes with field emitter arrays (FEA) cathodes was investigated. The resonator has a smaller size and mass when a doublegap capacitive segment of each quasi-lumped resonator consists of two assimmetrical strip conductors on opposite sides of the substrate and both inductive segments are grounded. This resonance circuit has two oscillation modes (anti-phase and in-phase). On the basis of the 3-D modeling found that such oscillatory systems can achieve the excitation of these modes with multiplicity of frequencies to = 2 with a good efficiency of interaction of electrons with microwave fields.
Analysis of the possibility of performing microminiature low-voltage electron devices for vacuum millimeter-wavelength integral circuit
The output characteristics of a strip distributed microwave (MW) power amplifier tuned by voltage in a wide frequency range analyzed. New energy collector designs are proposed to be employed in the amplifier in the form of a periodically nonuniform strip line and electron optical system comprising an electron gun with the multi-edge field emitter array current modulator. Their electrodynamic and current parameters have been calculated by rigorous methods. The analysis of the output amplitude-frequency characteristics of the amplifier was performed. It is shown that, unlike the previously reported amplifier design, it can allow for a higher gain in the short-wavelength region of centimeter band, including the millimeter band, or operate at substantially lower beam currents.
Calculation of and Errors in the Susceptibility
The measurement of the susceptibility requires three measurements, two of which have to be performed with a substance of known susceptibility. The difference of these last two measurements furnishes the proportionality constant of the apparatus, always employing the same volume, while the difference with the unknown substance gives the required susceptibility.