Abstract: A waveguide device includes: a first conductive member having an electrically conductive surface; a second conductive member having a plurality of electrically conductive rods arrayed thereon, each conductive rod having a leading end opposing the conductive surface; and a waveguide member having an electrically conductive waveguide face opposing the conductive surface, the waveguide member being disposed among the conductive rods and extending along the conductive surface. The waveguide member includes at least one of a bend and a branching portion. A measure of an outer shape of a cross section of at least one of the plurality of conductive rods that is adjacent to the bend or the branching portion, taken perpendicular to an axial direction of the at least one conductive rod, monotonically decreases from a root that is in contact with the second conductive member toward a leading end.

Abstract: A slot antenna array includes: a first electrically conductive member having a first electrically conductive surface on a front side and a second electrically conductive surface on a rear side, and having a first and second slots; a second electrically conductive member having a front-side third electrically conductive surface opposed to the second electrically conductive surface; a first waveguide member having an electrically-conductive waveguide face extending while being opposed to the second or third electrically conductive surface; an electrically-conductive first waveguiding wall disposed so as to surround or sandwich at least a portion of a space between the second slot and the first throughhole; and a first artificial magnetic conductor disposed on both sides of the first waveguide member and around the first waveguiding wall.

Abstract: A slot array antenna includes: a first electrically conductive member having first to third slot rows, a second electrically conductive member, and a plurality of waveguides located between the first and second electrically conductive members. The plurality of waveguides include first to third waveguides respectively coupling to the first to third slot rows. The interval between the first and second slots is narrower than the interval between the second and third slot rows. Each waveguide includes a stem connected to a microwave IC, and a plurality of branches branching out from the stem via a branching portion(s). Each branch couples to at least one slot. As viewed from a direction perpendicular to the first electrically conductive member, portions of the stems of the first and second waveguides that lead to their branching portions are located outside of the first and second slot rows.

Abstract: A slot antenna device includes: a first electrically conductive member having a first electrically conductive surface and a second electrically conductive surface; a second electrically conductive member having a third electrically conductive surface that opposes the second electrically conductive surface; a waveguide member on the second electrically conductive surface; and an artificial magnetic conductor extending on both sides of the waveguide member. The first electrically conductive member has a slot. The waveguide member an electrically-conductive waveguide that opposes the third electrically conductive surface. The waveguide member includes a first ridge and a second ridge. One end of the first ridge and one end of the second ridge are opposed to each other. As viewed from a direction perpendicular to the waveguide face, the slot is located between the one end of the first ridge and the one end of the second ridge.

Abstract: A slot array antenna includes: a first electrically conductive member having a first electrically conductive surface; a second electrically conductive member having a second electrically conductive surface opposed to the first electrically conductive surface; a waveguide member located between the first and second electrically conductive members; and an artificial magnetic conductor extending on both sides of the waveguide member in between the first and second electrically conductive members. The first or second electrically conductive member has a plurality of slots. The waveguide member includes an electrically-conductive waveguide face of a stripe shape opposed to the first electrically conductive surface. The plurality of slots include at least two slots that couple to the waveguide face. In between two positions respectively coupled to the two slots, the waveguide face includes at least one deflecting portion at which the direction that the waveguide face extends changes.

Abstract: A waveguide device includes a first electrically conductive member having a first electrically conductive surface; a second electrically conductive member having a second electrically conductive surface which opposes the first electrically conductive surface; and a ridge-shaped waveguide member on the second electrically conductive member. The second electrically conductive member has a throughhole which splits the waveguide member into first and second ridges. The first and second ridges each have an electrically conductive end face, the end faces opposing each other via the throughhole. The opposing end faces and the throughhole together define a hollow waveguide. The hollow waveguide is connected to a first waveguide extending between the waveguide face of the first ridge and the first electrically conductive surface, and to a second waveguide extending between the waveguide face of the second ridge and the first electrically conductive surface.

Abstract: A waveguide device according to an embodiment includes an electrically conductive member having an electrically conductive surface, a waveguide member extending so as to face along the electrically conductive surface, and stretches of artificial magnetic conductor on both sides of the waveguide member. The waveguide member includes a first portion extending in one direction, and at least two branches extending in mutually different directions from one end of the first portion, the at least two branches including a second portion and a third portion. The second portion has a recess in a side face that connects to one side face of the first portion, the recess reaching the waveguide face.

Abstract: A slot array antenna includes: a first conductive member having a first conductive surface and a plurality of slots arranged in a first direction; a second conductive member having a second conductive surface that opposes the first conductive surface; a waveguide member having a waveguide face that extends so as to oppose one of the first and second conductive surfaces; and an artificial magnetic conductor extending around the waveguide member. The waveguide member includes: a stem extending along a direction; first and second joint portions branching out from an end of the stem and extending into a region between two adjacent slots; a first branch extending in the first direction from an end of the first joint portion and coupling to some slots; and a second branch extending from an end of the second joint portion in an opposite direction of the first direction and coupling to other slots.

Abstract: A slot array antenna includes: an electrically conductive member having an electrically conductive surface and slots therein, the slots being arrayed in a first direction which extends along the conductive surface; a waveguide member having an electrically conductive waveguide face which opposes the slots and extends along the first direction; and an artificial magnetic conductor extending on both sides of the waveguide member. At least one of the conductive member and the waveguide member includes dents on the conductive surface and/or the waveguide face, the dents each serving to broaden a spacing between the conductive surface and the waveguide face relative to any adjacent site. The dents include a first, second, and third dents which are adjacent to one another and consecutively follow along the first direction. A distance between centers of the first and second dents is different from a distance between centers of the second and third dents.

Abstract: A waveguide device includes: an electrically conductive member having an electrically conductive surface; a waveguide member having an electrically-conductive waveguide face of a stripe shape opposing the electrically conductive surface, the waveguide member extending along the electrically conductive surface; and an artificial magnetic conductor extending on both sides of the waveguide member. The waveguide member has a bend at which the direction that the waveguide member extends changes. A waveguide which is defined by the electrically conductive surface, the waveguide face, and the artificial magnetic conductor includes a gap enlargement where a gap between the electrically conductive surface and the waveguide face is locally increased. In a perspective view along a direction perpendicular to the electrically conductive surface, at least a portion of the bend has an overlap with the gap enlargement.

Abstract: A waveguide device includes: a first conductive member having an electrically conductive surface; a second conductive member having a plurality of electrically conductive rods arrayed thereon, each conductive rod having a leading end opposing the conductive surface; and a waveguide member having an electrically conductive waveguide face opposing the conductive surface, the waveguide member being disposed among the conductive rods and extending along the conductive surface. The waveguide member includes at least one of a bend and a branching portion. A measure of an outer shape of a cross section of at least one of the plurality of conductive rods that is adjacent to the bend or the branching portion, taken perpendicular to an axial direction of the at least one conductive rod, monotonically decreases from a root that is in contact with the second conductive member toward a leading end.

Abstract: A slot array antenna includes: an electrically conductive member having an electrically conductive surface and slots therein, the slots being arrayed in a first direction which extends along the conductive surface; a waveguide member having an electrically conductive waveguide face which opposes the slots and extends along the first direction; and an artificial magnetic conductor extending on both sides of the waveguide member. At least one of the conductive member and the waveguide member includes dents on the conductive surface and/or the waveguide face, the dents each serving to broaden a spacing between the conductive surface and the waveguide face relative to any adjacent site. The dents include a first, second, and third dents which are adjacent to one another and consecutively follow along the first direction. A distance between centers of the first and second dents is different from a distance between centers of the second and third dents.

Abstract: A slot array antenna includes: an electrically conductive member having an electrically conductive surface and slots therein, the slots being arrayed in a first direction which extends along the conductive surface; a waveguide member having an electrically conductive waveguide face which opposes the slots and extends along the first direction; and an artificial magnetic conductor extending on both sides of the waveguide member. At least one of the conductive member and the waveguide member includes dents on the conductive surface and/or the waveguide face, the dents each serving to broaden a spacing between the conductive surface and the waveguide face relative to any adjacent site. The dents include a first, second, and third dents which are adjacent to one another and consecutively follow along the first direction. A distance between centers of the first and second dents is different from a distance between centers of the second and third dents.

Abstract: A slot array antenna includes: an electrically conductive member having an electrically conductive surface and slots therein, the slots being arrayed in a first direction which extends along the conductive surface; a waveguide member having an electrically conductive waveguide face which opposes the slots and extends along the first direction; and an artificial magnetic conductor extending on both sides of the waveguide member. At least one of the conductive member and the waveguide member includes dents on the conductive surface and/or the waveguide face, the dents each serving to broaden a spacing between the conductive surface and the waveguide face relative to any adjacent site. The dents include a first, second, and third dents which are adjacent to one another and consecutively follow along the first direction. A distance between centers of the first and second dents is different from a distance between centers of the second and third dents.

Abstract: A slot array antenna includes: an electrically conductive member having an electrically conductive surface and slots therein, the slots being arrayed in a first direction which extends along the conductive surface; a waveguide member having an electrically conductive waveguide face which opposes the slots and extends along the first direction; and an artificial magnetic conductor extending on both sides of the waveguide member. At least one of the conductive member and the waveguide member includes dents on the conductive surface and/or the waveguide face, the dents each serving to broaden a spacing between the conductive surface and the waveguide face relative to any adjacent site. The dents include a first, second, and third dents which are adjacent to one another and consecutively follow along the first direction. A distance between centers of the first and second dents is different from a distance between centers of the second and third dents.

Abstract: A slot array antenna includes: an electrically conductive member having an electrically conductive surface and slots therein, the slots being arrayed in a first direction which extends along the conductive surface; a waveguide member having an electrically conductive waveguide face which opposes the slots and extends along the first direction; and an artificial magnetic conductor extending on both sides of the waveguide member. At least one of the conductive member and the waveguide member includes dents on the conductive surface and/or the waveguide face, the dents each serving to broaden a spacing between the conductive surface and the waveguide face relative to any adjacent site. The dents include a first, second, and third dents which are adjacent to one another and consecutively follow along the first direction. A distance between centers of the first and second dents is different from a distance between centers of the second and third dents.

Abstract: A waveguide device according to an embodiment includes an electrically conductive member having an electrically conductive surface, a waveguide member extending so as to face along the electrically conductive surface, and stretches of artificial magnetic conductor on both sides of the waveguide member. The waveguide member includes a first portion extending in one direction, and at least two branches extending in mutually different directions from one end of the first portion, the at least two branches including a second portion and a third portion. The second portion has a recess in a side face that connects to one side face of the first portion, the recess reaching the waveguide face.

Abstract: A waveguide device includes: a first conductive member having a first conductive surface; a first waveguide member having a first waveguide face opposing the first conductive surface; a plurality of first conductive rods on both sides of the first waveguide member; a second conductive member having a second conductive surface; a second waveguide member having a second waveguide face opposing the second conductive surface; and a plurality of second conductive rods on both sides of the second waveguide member. A first waveguide gap exists between the first waveguide face and the first conductive surface. A second waveguide gap exists between the second waveguide face and the second conductive surface. One end of the first waveguide gap is connected to the second waveguide gap, and at a connecting portion therebetween, the first waveguide face extends in a direction that intersects a plane which is parallel to the second conductive surface.

Abstract: A waveguide device includes: an electrically conductive member having an electrically conductive surface; a waveguide member having an electrically-conductive waveguide face of a stripe shape opposing the electrically conductive surface, the waveguide member extending along the electrically conductive surface; and an artificial magnetic conductor extending on both sides of the waveguide member. The waveguide member has a bend at which the direction that the waveguide member extends changes. A waveguide which is defined by the electrically conductive surface, the waveguide face, and the artificial magnetic conductor includes a gap enlargement where a gap between the electrically conductive surface and the waveguide face is locally increased. In a perspective view along a direction perpendicular to the electrically conductive surface, at least a portion of the bend has an overlap with the gap enlargement.

Abstract: A slot antenna includes: a first electrically conductive member having a first electrically conductive surface; a second electrically conductive member having a second electrically conductive surface opposing the first electrically conductive surface; a waveguide member between the first electrically conductive member and the second electrically conductive member, the waveguide member having an electrically conductive waveguide face of a stripe shape opposing the first electrically conductive surface, the waveguide member extending in a first direction along the first electrically conductive surface; and an artificial magnetic conductor extending on both sides of the waveguide member, between the first electrically conductive member and the second electrically conductive member. The first electrically conductive member has one or more slots. At least one of the slot or slots is a complex slot having a pair of vertical portions and a lateral portion that interconnects the pair of vertical portions.