Patent ID: 6995724

Claim:
A slotted waveguide radiator Comprising: a waveguide portion having a waveguide with a rectangular section surrounded by a pair of narrow aide plates opposed to each other, and a pair of broad side plates extending along the lengthwise direction of the pair of narrow side plates; and a radiation portion which is provided on one broad side plate of the pair of broad side plates of the waveguide portion and which has a plurality of slots for radiating an electromagnetic wave input into the waveguide portion externally from the one broad side plate, wherein: the waveguide portion includes a first waveguide member and a second waveguide member, and the first waveguide member and the second waveguide member are joined at edge portions, in longitudinal directions thereof, matched with central lines of the pair of broad side plates; said plurality of slots of the radiation portion include a first group of slots and a second group of slots which are respectively defined in the first waveguide member and the second waveguide member at predetermined intervals in a staggered manner; and the first group of slots and the second group of slots are provided such that one side of each slot of the respective groups is coincident with the central lines of the pair of broad side plates.