Abstract: A compact slot-type antenna has a dielectric interposed between a conductor plate and a stripline. The conductor plate has a slot, and the stripline has a first line section extending in a longitudinal direction of the slot and a second line section extending in a direction orthogonal to the first line section and having one end connected to the first line section. The first line section lies wholly within a projection area of the slot and is electromagnetically coupled to the conductor plate around the slot. A slit in the conductor plate extends from the slot to a side of the conductor plate which faces the first line section.

Abstract: A printing unit includes: a line feed plate moving with a carriage in a line feed operation area; and guide members provided on a unit frame, engaging with the line feed plate, and guiding the carriage and the line feed plate toward one side in a left-right direction as the carriage and the line feed plate move toward one side in a front-back direction in the line feed operation area. Each guide member includes: a line feed guide extending toward one side in the left-right direction as it goes toward one side in the front-back direction and guiding the carriage toward one side in the left-right direction as the carriage moves toward one side in the front-back direction in the line feed operation area; and regulating sections continuing at least to one end in the front-back direction of the line feed guide and regulating the movement of the carriage in the left-right direction.

Abstract: A printing unit includes a carriage, a printing head mounted on the carriage, a guide pillar configured to support the carriage to be reciprocatingly movable in the front-back direction, a unit frame configured to support the guide pillar to be movable in the left-right direction, and a line-feed mechanism configured to move the carriage in the left-right direction. The line-feed mechanism includes a line-feed plate supported by the guide pillar to be movable in the front-back direction and a guide member configured to engage with the line-feed plate and guide the line-feed plate in the left-right direction together with the guide pillar according to the movement in the front-back direction of the line-feed plate.

Abstract: A planar inverted F antenna has a ground conductive plate and a main conductive plate that are short-circuited by a short circuit member. The main conductive plate connects to a feeding line for feeding power to the antenna and includes opposite side ends, a base extending from one side end to a prescribed position in the direction toward the other side end, and a slit extending from the other side end of the main conductive plate up to the prescribed position to form a microstrip line that is connected to the feeding line and at least one excitation conductive plate spaced apart from the microstrip line. The prescribed position includes a feeding point to which power is supplied from the feeding line via the microstrip line having a width such that an input impedance of the antenna at the feeding point and a characteristic impedance become Z.

Abstract: A planar inverted F antenna has a ground conductive plate and a main conductive plate that are short-circuited by a short circuit member. The main conductive plate connects to a feeding line for feeding power to the antenna and includes opposite side ends, a base extending from one side end to a prescribed position in the direction toward the other side end, and at least one slit extending from the other side end up to the prescribed position to form a microstrip line to which the feeding line is connected and at least one excitation conductive plate spaced apart from the microstrip line. Power is supplied to a feeding point at the prescribed position from the feeding line via the microstrip line which has a width selected so that both an input impedance of the antenna at the feeding point and a characteristic impedance of the transmission line become Z.