HF frequency tuning device

Details HF frequency tuning device HF frequency tuning device

2011-04-26

2011-04-26

Song, Hoon (Department: 2882)

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

C378S119000

Reexamination Certificate

active

07933381

ABSTRACT:
An HF frequency tuning device includes a resonance cavity in which an HF is introduced, a phase detecting section which generates a sign data representing a sign of a phase difference between a traveling wave and a reflected wave included in the HF in the resonance cavity. The frequency of the HF is repeatedly shifted by a first pitch. The direction of the shift is determined by the sign data for reducing the phase difference. When the sign is inverted, the frequency of the HF is repeatedly shifted to the opposite direction by a second pitch smaller than the first pitch until the sign is inverted again. By this tuning process, the fine tuning of HF can by achieved in a short time.

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C.J. Karzmark, Creig S. Nunan and Eiji Tanabe, 1993, Medical Electron Accelerators, McGraw-Hill, New York, Table of contents and Preface.

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