Abstract: An antenna module includes an antenna substrate and a feed circuit. The antenna substrate has an upper surface and a lower surface, and a radiating element having a flat plate shape is arranged in the antenna substrate. The feed circuit 105 is mounted on the lower surface of the antenna substrate and supplies a radio frequency signal to the radiating element. The antenna substrate includes a dielectric substrate on which the radiating element is arranged, a ground electrode, a feed wiring, and carbides. The ground electrode is arranged between the radiating element and the lower surface in the dielectric substrate. The feed wiring transmits the radio frequency signal supplied from the feed circuit to the radiating element. The carbides are disposed on at least a part of a side surface connecting the upper surface and the lower surface in the dielectric substrate.

Abstract: An antenna module including a dielectric substrate having a long side and a short side, a ground electrode, a radiating element, a peripheral electrode, and a parasitic element. The radiating element is disposed to face the ground electrode. The peripheral electrode is disposed along the long side of the dielectric substrate and is electrically connected to the ground electrode. The parasitic element is disposed along the short side of the dielectric substrate and is disposed away from the radiating element. The radiating element is configured to emit radio waves in two polarization directions along the long side and the short side of the dielectric substrate. The shortest distance between the radiating element and the parasitic element is greater than the shortest distance between the radiating element and the peripheral electrode.

Abstract: An antenna device is formed by arranging a plurality of radiation elements each radiating a circularly polarized wave in a matrix of three rows and ten columns. The plurality of radiation elements include radiation elements of four types having a positional relationship rotationally symmetric with each other. The plurality of radiation elements are included in a first element group in which radiation elements are arranged in a matrix of three rows and three columns in one end portion side and a second element group in which radiation elements are arranged in a matrix of three rows and three columns in the other end portion side. A first center element disposed at a center of the first element group is an element of a type obtained by rotating a second center element disposed at a center of the second element group by 180 degrees.

Abstract: An antenna device is formed by arranging radiation elements each radiating a circularly polarized wave in a matrix of three rows and four columns. The radiation elements include three sets of radiation elements of four types having a positional relationship rotationally symmetric with each other. The radiation elements are arranged such that adjacent elements are of different types.

Abstract: A coupling structure for coupling an antenna substrate and a rigid substrate to each other is provided. The coupling structure includes an antenna substrate and a rigid substrate. The antenna substrate includes a dielectric and an antenna electrode, and the rigid substrate includes a dielectric and a wiring electrode, the dielectric including a plurality of laminated dielectric layers. The antenna electrode is electrically coupled to the wiring electrode. The dielectric includes an upper surface and a bottom surface that are perpendicular to the lamination direction and holds the dielectric, part of the dielectric being located between the upper surface and the bottom surface. The antenna electrode has a first recess the area of which overlaps the wiring electrode in plan view in the lamination direction.

Abstract: In a first region of a ground electrode, a width of a protrusion of the ground electrode in a first direction, in which a notch portion is formed, from a slot is different from a width of the ground electrode in a second direction opposite to the first direction from the slot.

Abstract: An antenna element includes a dielectric substrate, a first ground electrode, a second ground electrode, a via conductor, and a radiation electrode. The dielectric substrate includes a first portion shaped like a flat plate and a second portion thinner than the first portion. The first ground electrode is arranged in the first portion. The second ground electrode is arranged in the second portion. The via conductor couples the first ground electrode and the second ground electrode. A distance between the radiation electrode and the first ground electrode in a first thickness direction is more than a distance between the radiation electrode and the second ground electrode in a second thickness direction. Part of the radiation electrode lies opposite to the first ground electrode without lying opposite to the second ground electrode.

Abstract: An antenna module includes a dielectric substrate, radiating circuits disposed on the dielectric substrate, a ground electrode, and a dielectric layer. In a plan view in a direction of a normal line of the dielectric substrate, the radiating circuit is disposed adjacent to the radiating circuit. The ground electrode is disposed to face the radiating circuit and the radiating circuit. The dielectric layer is disposed to cover the radiating circuit. The radiating circuit is capable of emitting an electric wave in a frequency band higher than that for the radiating circuit. A dielectric constant of the dielectric layer is higher than a dielectric constant of the dielectric substrate. A distance between the radiating circuit and the ground electrode is shorter than a distance between the radiating circuit and the ground electrode.

Abstract: A plurality of multi-band antenna elements operable at a plurality of frequencies constitutes an array antenna. An antenna drive unit selects at least some of the multi-band antenna elements from the plurality of multi-band antenna elements in accordance with one operation frequency selected from the plurality of operation frequencies, and causes the selected multi-band antenna elements to operate.

Abstract: An antenna module includes a multilayer substrate having a first main surface and a second main surface opposing to each other, a patch antenna formed on a side of the first main surface of the multilayer substrate and configured with a radiation electrode and a ground electrode, an RFIC formed on a side of the second main surface of the multilayer substrate, a first filter, and a second filter different from the first filter, wherein the patch antenna has a first feed point and a second feed point provided at different positions in the radiation electrode, the first feed point is electrically connected to the RFIC via the first filter, the second feed point is electrically connected to the RFIC via the second filter, and the first filter and the second filter are formed in the multilayer substrate.

Abstract: An antenna device includes a ground electrode, a feed element, and a parasitic element. The ground electrode has a substantially non-square rectangular plane shape that includes a first side extending in a first direction and a second side extending in a second direction orthogonal to the first direction. The feed element has a substantially rectangular plane shape and is formed in such a way that each side of the feed element becomes parallel to the first direction or the second direction. The parasitic element is formed in such a manner as to face a side of the feed element parallel to the first side. The feed element is configured to radiate a first polarized wave that excites in the first direction and a second polarized wave that excites in the second direction. The length of the first side is longer than the length of the second side.

Abstract: A multilayer substrate in which dielectric layers are laminated, the multilayer substrate including: a first electrode formed on the dielectric layers; and a first ground electrode disposed so as to be opposite to the first electrode in a multilayer direction. In the multilayer substrate, a plurality of dielectric layers include a first layer and a second layer that are disposed between a layer in which the first electrode is formed and a layer in which the first ground electrode is formed. In the first layer, a filler having permittivity lower than permittivity of a base material forming the dielectric layer is not disposed. In the second layer, the filler is disposed in at least a part of a region where the first electrode and the first ground electrode overlap each other in planar view of the multilayer substrate from the multilayer direction.

Abstract: A communications apparatus an antenna module include a first substrate on which a first radiation electrode and a first ground electrode are disposed; a second substrate on which a second radiation electrode and a second ground electrode are disposed; a third substrate on which a third ground electrode is disposed; and a first connection member having a flat plate shape and connected between the first substrate and the second substrate, a fourth ground electrode being disposed on the first connection member. A radio frequency signal is transmitted to the first radiation electrode through the first connection member, and a main surface of the first connection member is in contact with a main surface of the third substrate.

Abstract: A communication apparatus includes: an antenna module provided with an antenna element having a flat plate shape; a housing that accommodates the antenna module; a heat dissipation plate; and an electrode. The heat dissipation plate is disposed between the housing and the antenna module, and provided with an opening that faces the antenna element. The electrode faces the antenna element in a direction normal to the antenna element and on a side of the first radiating element that radiates the radio wave.

Abstract: An antenna module includes a dielectric layer in a form of a flat plate, a ground electrode, a radiating element, and a wiring cable. The ground electrode is arranged on a lower surface of the dielectric layer. The radiating element is arranged on an upper surface of the dielectric layer as being opposed to the ground electrode. The wiring cable faces a side surface of the dielectric layer, and includes a ground electrode and a power feeder line that conveys a radio frequency signal to the radiating element. The wiring cable is smaller in thickness than the dielectric layer. The power feeder line and the ground electrode are electrically connected to the radiating element and the ground electrode, respectively. The ground electrode is arranged at a position different from a position of the ground electrode in a direction of thickness of the dielectric layer.

Abstract: The antenna module includes a first substrate and a second substrate on each of which a radiating element is arranged, a third substrate, and a switch circuit. An RFIC for supplying a radio frequency signal to the first substrate and the second substrate is arranged on the third substrate. The switch circuit is configured to change over a connection between the RFIC and the radiating element on the first substrate and a connection between the RFIC and the radiating element on the second substrate.

Abstract: An antenna module includes feed elements each having a flat plate shape and a ground electrode arranged opposite the feed elements. The feed element radiates a radio wave of a first frequency band. The feed element radiates a radio wave of a second frequency band that is higher than the first frequency band. In a plan view of the feed element, the distance from the center of the feed element to an end portion of the ground electrode in a first direction is shorter than or equal to ½ of a free space wavelength of a radio wave radiated from the feed element. A feed point of the feed element is arranged at a location shifted in a second direction from the center of the feed element, and the second direction is different from the first direction.

Abstract: An antenna module includes a first substrate, a second substrate, a connection member connected between the first substrate and the second substrate, and an FEM disposed on the connection member. A radiating element is disposed on the first substrate. An RFIC for supplying a radio frequency signal to the radiating element is disposed on the second substrate. The connection member transmits radio frequency signals between the RFIC and the radiating element. The FEM amplifies radio frequency signals transmitted between the RFIC and the radiating element. The FEM is disposed at a position between a connecting point with the first substrate and a connecting point with the second substrate on the connection member.

Abstract: An antenna device includes a ground electrode, a feed element, and a parasitic element. The ground electrode has a substantially non-square rectangular plane shape that includes a first side extending in a first direction and a second side extending in a second direction orthogonal to the first direction. The feed element has a substantially rectangular plane shape and is formed in such a way that each side of the feed element becomes parallel to the first direction or the second direction. The parasitic element is formed in such a manner as to face a side of the feed element parallel to the first side. The feed element is configured to radiate a first polarized wave that excites in the first direction and a second polarized wave that excites in the second direction. The length of the first side is longer than the length of the second side.

Abstract: An antenna module includes a first antenna element disposed at a first dielectric substrate, a second antenna element disposed at a second dielectric substrate, a joint connecting the first dielectric substrate and the second dielectric substrate, and a power supply line. The second dielectric substrate is different from the first dielectric substrate with respect to the normal direction. The power supply line extends from the first dielectric substrate via the joint to the second antenna element and is configured to communicate a radio-frequency signal to the second antenna element. At least a part of the power supply line at the joint is formed in a direction crossing the polarization plane of radio waves radiated by the first antenna element and the second antenna element.