Abstract: Disclosed herein is a bias tee circuit connected between a common terminal and power supply and signal terminals, the bias tee circuit includes a capacitor inserted between the common terminal and the signal terminal, and first and second inductors inserted in series between the common terminal and the power supply terminal. The first inductor is connected on a side of the common terminal. The second inductor is connected on a side of the power supply terminal. The second inductor is higher in self-resonance frequency and lower in Q value than the first inductor.

Abstract: An aspect of this electrical device includes: a body controller which controls the electrical device; a voltage generator which generates a voltage supplied to the electrical device; a wiring which connects the body controller to the voltage generator; and an electrical device casing which accommodates the body controller and the voltage generator, wherein the electrical device casing includes: a wiring chamber in which the wiring is arranged; a first chamber in which the body controller is accommodated; and a second chamber in which the voltage generator is accommodated, wherein an inside of the first chamber and an inside of the second chamber are connected to each other through the inside of the wiring chamber.

Abstract: An electrostatic precipitator includes: a casing attached to a housing a fixing member a supporter a device body supported by the supporter and is detachably attached to the supporter; and a hook member supporting the device body. The device body includes a handle protruding in a first direction and a pair of protrusions protruding from both end side surfaces of the delivery body in a second direction, the supporter includes a pair of first support portions respectively supporting the pair of protrusions by hooking the pair of protrusions, the hook member includes a hook portion supporting the handle the handle includes a pair of extending portions protruding in the first direction and a grip portion connecting the extending portions, the hook portion supports the grip portion from below, and the hook member is attached to the supporter so as to be slidable in the first direction.