Deflector for a deflection‐modulated EBS amplifier

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Abstract
The deflection‐modulated EBS amplifier operating at microwave frequencies requires a deflector working effectively in the frequency band. the relation between the structure of a meander line and its deflection sensitivity, frequency response, and a new type of the support were investigated; thus a deflector for a 4‐GHz deflection‐modulated EBS amplifier was manufactured. A formula has been derived for the deflection, and it is found that the deflection sensitivity is maximized at a certain ratio of the finger gap to the finger pitch of the meander line. When this ratio is increased, the variation of the deflection sensitivity over a given frequency band is reduced. We proposed a quarter‐wave strip line to support the meander line; it is confirmed experimentally that its quality is almost equivalent to the conventional ceramic spacer.

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