Abstract: Provided is an antenna device for a vehicle including an antenna base including a bottom surface portion, a circuit board disposed above the bottom surface portion to face the bottom surface portion, and an antenna element disposed on an outer periphery, and forming a slot antenna with a side end of the antenna base being a facing side of a slot.

Abstract: A slotted patch antenna includes a dielectric substrate, a radiation electrode which is provided on a major surface of the dielectric substrate, and a ground conductor which is disposed on a surface that is opposite to the major surface. The radiation electrode is formed with a slots having at least one of a meandering portion, a curve portion, or a folded portion. An external shape of the radiation electrode is a square, and totally two pairs of slots are formed inside the square, each of the slots being along respective sides of the square. Each of the slots is arranged so as to be line-symmetrical with respect to an axis of symmetry that is parallel with one of the sides of the square and passes through a center of the square, and to be point-symmetrical with respect to the center of the square.

Abstract: An antenna device includes a patch antenna serving as a first antenna; and a second antenna including capacitance loading elements, the capacitance loading elements being located above the patch antenna and also arranged separately in a predetermined direction. Also, an antenna device includes a patch antenna serving as a first antenna; and a second antenna including capacitance loading elements, the capacitance loading elements being located above the patch antenna, and a slit-like cutout part in a predetermined direction being formed in at least one of side edges of the capacitance loading elements.

Abstract: A slotted patch antenna includes a dielectric substrate, a radiation electrode which is provided on a major surface of the dielectric substrate, and a ground conductor which is disposed on a surface that is opposite to the major surface. The radiation electrode is formed with a slots having at least one of a meandering portion, a curve portion, or a folded portion. An external shape of the radiation electrode is a square, and totally two pairs of slots are formed inside the square, each of the slots being along respective sides of the square. Each of the slots is arranged so as to be line-symmetrical with respect to an axis of symmetry that is parallel with one of the sides of the square and passes through a center of the square, and to be point-symmetrical with respect to the center of the square.

Abstract: An antenna mounting apparatus, including a bracket that holds at least a part of electronic components constituting an antenna device including an antenna element, the bracket being fixed by a bolt fixed to a frame; and a holder provided on a first surface of the bracket facing the frame, the holder temporarily fixing the bolt.

Abstract: A first signal line pattern has one end electrically connected to a first connector. A second signal line pattern has one end electrically connected to a second connector. The second signal line pattern has the other end facing the other end of the first signal line pattern. A conductive block has a convex portion. The convex portion of the conductive block is electrically connected to a third portion of the conductive pattern positioned between the other end of the first signal line pattern and the other end of the second signal line pattern of the wiring board.

Abstract: An antenna apparatus has a sleeve antenna. The sleeve antenna has an internal conductive member, an external conductive member, an insulating member, and a mountain-shaped conductive member that is electrically connected to the external conductive member. The mountain-shaped conductive member expands radially from an upper edge towards a lower edge. The internal conductive member protrudes higher than the external conductive member above the upper edge of the mountain-shaped conductive member.

Abstract: A spring-loaded connector (2) includes a waterproof elastic member (50). The waterproof elastic member (50) includes cylindrical parts (51) corresponding to respective contact units (10). When the cylindrical part (51) is sandwiched between a first pin (11) and an intermediate member (13) of the corresponding contact unit (10), the waterproof elastic member (50) seals between the first pin (11) and the intermediate member (13) in a watertight manner while allowing the contact unit (10) to penetrate. The waterproof elastic member (50) includes, between the cylindrical parts (51) that are adjacent to each other, a water-shielding structure (52) for preventing the first pins (11) of the contact units (10) corresponding to the adjacent cylindrical parts from being electrically connected due to presence of water between the first pins (11).

Abstract: In an antenna device, when an AM/FM antenna as a first antenna and an SDARS antenna or a GPS antenna as a second antenna that have different frequency bands are provided in a common case, an additional conductor portion extends out from a conductor main body portion of a capacitive element, and the additional conductor portion includes a parallel strip-shaped portion having a length that is ¼ of an effective wavelength in a frequency band of the second antenna, and extending parallel to the conductor main body portion.

Abstract: An antenna device to be mounted on a vehicle includes an antenna base; and an antenna element erected on the antenna base, wherein the antenna element includes a proximal end portion fixed on a plane substantially perpendicular to the antenna base and two arm portions extending in directions away from each other from the proximal end portion, and wherein an inductance of at least one of the two arm portions is larger than an inductance of a planer conductor having a same material and a substantially same outer shape. In one embodiment, an inductance of one arm portion of the two arm portions is be smaller than an inductance of the other arm portion.

Abstract: An antenna device for a vehicle includes: an antenna base to be attached to the vehicle; a first antenna for a first frequency band provided on the antenna base; and a second antenna for a second frequency band provided on the antenna base, in which the first frequency band and the second frequency band are different from each other, and the second antenna serves as a reflector of the first antenna in the first frequency band of the first antenna.

Abstract: An antenna (100) includes a ground plate (110) and a radiating element (130) that has a shape expanding in a predetermined expansion direction and a self-similar shape with respect to an end portion (135) connected to a feeding line (151) that is a feeding portion. The radiating element (130) is arranged in a standing state relative to the end portion (135) so as to face the end portion (135) toward the ground plate (110). In addition, the radiating element (130) has a first radiating element portion (131) and a second radiating element portion (133) that are plane-symmetric to each other across a predetermined virtual symmetric plane (A1) along the expansion direction, and thereby forms a shape expanded in the expansion direction.

Abstract: An antenna device for a vehicle includes an antenna board in which a colinear array antenna is constructed by a conductor pattern provided on each of both surfaces of a dielectric substrate. The colinear array antenna includes a first straight portion, a second straight portion, a first connection portion one end of which is connected to the first straight portion, and a second connection portion one end of which is electrically connected to the first connection portion and another end of which is connected to the second straight portion. The first straight portion and the first connection portion are provided on a first surface of the dielectric substrate. The second straight portion and the second connection portion are provided on a second surface of the dielectric substrate opposite to the first surface.

Abstract: An antenna device includes an antenna board in which a conductor pattern is provided on each of both surfaces of a dielectric substrate. A linear element is provided on a first surface of the dielectric substrate. A slit antenna is provided on a second surface of the dielectric substrate opposite to the first surface. When the first surface and the second surface are superimposed on each other, the linear element and a slit of the slit antenna overlap with each other.

Abstract: An antenna device includes a case, a first antenna and a second antenna including a capacitance loading element. The capacitance loading element includes a turning-around area turning around in a front-rear direction on at least one of a front side and a rear side thereof. When the turning-around area is provided on the front side, at least part of the first antenna is situated in front of the turning-around area. When the turning-around area is provided on the rear side, at least part of the first antenna is situated behind the turning-around area. When the turning-around area is provided on the front side and on the rear side, at least part of the first antenna is situated at least one of in front of the turning-around area on the front side and behind the turning-around area on the rear side.

Abstract: A connector for holding a linear conductor by a first contact portion and a second contact portion is provided. The linear conductor is inserted through an insertion portion. The first contact portion is formed in a pressing portion configured to be deformed elastically to press the linear conductor against the second contact portion. The second contact portion is formed in a fixed portion which is not deformed elastically and the second contact portion has at least one edge portion.

Abstract: An antenna device includes a case, a first antenna and a second antenna including a capacitance loading element. The capacitance loading element includes a turning-around area turning around in a front-rear direction on at least one of a front side and a rear side thereof. When the turning-around area is provided on the front side, at least part of the first antenna is situated in front of the turning-around area. When the turning-around area is provided on the rear side, at least part of the first antenna is situated behind the turning-around area. When the turning-around area is provided on the front side and on the rear side, at least part of the first antenna is situated at least one of in front of the turning-around area on the front side and behind the turning-around area on the rear side.

Abstract: There is provided an antenna device for a vehicle capable of suppressing interference in a case where a plurality of antennas which receive signals in different frequency bands are close to one another. The antenna device for the vehicle includes a patch antenna and a capacitance loading element which are installed away from each other on an antenna base section which is attachable to a vehicle. The capacitance loading element is a part of an antenna capable of receiving a different use frequency band from which of the patch antenna, to form a three-dimensional shape in which a pair of linear conductors which respectively repeatedly turn in a predetermined direction are connected to each other via a linear connection conductor extending in a width direction of the antenna base section, and in the capacitance loading element, a length of a folded portion of each of the linear conductors is a non-resonant length of the patch antenna.

Abstract: An antenna device configured to be attached to a vehicle includes: an antenna of a resonance type; and a matching circuit connected to the antenna, wherein the matching circuit includes a first matching circuit connected to a feeding portion of the antenna and a second matching circuit connected to a subsequent stage of the first matching circuit, wherein the first matching circuit reduces an impedance in a frequency band that is away to a higher-frequency range or a lower-frequency range from a resonance point of the antenna such that the impedance is lower than before connection of the first matching circuit, and the second matching circuit increases an impedance in a vicinity of the resonance point of the antenna such that the impedance is higher than before connection of the second matching circuit.

Abstract: An antenna device includes a case, a first antenna and a second antenna in the case, the second antenna including a capacitance loading element. The capacitance loading element includes an inclined portion which extends from a front-upper side toward a rear-lower side at a front side of the capacitance loading element. The first antenna is provided in a front side with respect to the inclined portion.