Nec Network and Sensor Systems, Ltd.

Yukihira Nakazato

Akira Chiba

Eiji Fujiwara

Naoki Iizuka

In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includes: a power supply unit that supplies power fed from the power source to the microwave tube that is provided with a cathode, a heater for heating the cathode, an anode, and a collector; a power storage unit that stores the fed power and, if the voltage of the fed power decreases, supplies stored power that is power obtained by the power storing, to the microwave tube; and a power supply switching unit that, if the voltage of the fed power decreases, stops supplying the stored power to the anode and does not stop supplying the stored power to the heater.

Power supply device, microwave tube device, power supply method, and recording medium

The purpose is to make it possible to autonomously suppress a reduction in an electron beam without providing a means for supervising the electron beam intensity of a monitor or the like. An electron gun, provided with: a heater () in which one terminal serves as a heater terminal (H) and the other terminal serves as a shared terminal (HK), and in which a low-voltage power supply () is connected between the terminals, the heater () generating heat due to a current being supplied from the low-voltage power supply (); and a cathode electrode () connected to the shared terminal (HK) and heated by the heater () to discharge thermal electrons. A cathode current (Ik) due to the thermal electrons discharged from the cathode electrode (), and a current (Ih) due to the low-voltage power supply, flow in opposite directions through the heater ().

Growing community of inventors

Tokyo, Japan

Yukihira Nakazato