Abstract: The present application discloses a glass antenna arranged on a vehicular window glass. The glass antenna includes: a feeding terminal connected to an antenna amplifier; a first antenna connected to the feeding terminal and set so as to receive a radio frequency signal in a first frequency band which has a first wavelength at a central frequency of the first frequency band; a coupling element having a length set based on a length obtained by multiplying one-half of the first wavelength by a glass reduction rate, coupling element being connected to the feeding terminal; and a second antenna capacitively coupled to the coupling element and set so as to receive a radio frequency signal in a second frequency band which has a second wavelength at a central frequency of the second frequency band.

Abstract: The present application discloses a glass antenna arranged on a vehicular window glass. The glass antenna includes: a feeding terminal connected to an antenna amplifier; a first antenna connected to the feeding terminal and set so as to receive a radio frequency signal in a first frequency band which has a first wavelength at a central frequency of the first frequency band; a coupling element having a length set based on a length obtained by multiplying one-half of the first wavelength by a glass reduction rate, coupling element being connected to the feeding terminal; and a second antenna capacitively coupled to the coupling element and set so as to receive a radio frequency signal in a second frequency band which has a second wavelength at a central frequency of the second frequency band.

Abstract: There is provided an AM/FM receiving antenna, which is provided at a windowpane of a vehicle, comprising an AM antenna element including an end portion as a power supply point and another end portion forming an open end, and an AM/FM antenna element connected to the AM antenna element via the power supply point, wherein a distance L between the end portion and the another end portion of the AM antenna element, a reduction ratio ? of a material of the windowpane, a minimum wavelength ?min of a receiving FM frequency band, and a maximum wavelength ?max of the receiving FM frequency band meet a requirement equation of ?·?min/2?L??·?max/2. The AM/FM receiving antenna can properly achieve the compatibility of receiving sensitivity of the AM and FM electric waves, having a smaller layout space for antenna elements.

Abstract: There is provided an AM/FM receiving antenna, which is provided at a windowpane of a vehicle, comprising an AM antenna element including an end portion as a power supply point and another end portion forming an open end, and an AM/FM antenna element connected to the AM antenna element via the power supply point, wherein a distance L between the end portion and the another end portion of the AM antenna element, a reduction ratio ? of a material of the windowpane, a minimum wavelength ?min of a receiving FM frequency band, and a maximum wavelength ?max of the receiving FM frequency band meet a requirement equation of ?·?min/2?L??·?max/2. The AM/FM receiving antenna can properly achieve the compatibility of receiving sensitivity of the AM and FM electric waves, having a smaller layout space for antenna elements.

Abstract: In an antenna apparatus for a vehicle, the antenna apparatus being provided on the vehicle in which at least a part of an outside plank panel of the vehicle is constituted by an outer panel made of a synthetic resin material, the antenna apparatus has at least one non-earthed type antenna, the non-earthed type antenna is provided with a first antenna element connected to an inner conductor of a coaxial cable via a first feeding point, and a second antenna element connected to an outer conductor of the coaxial cable via a second feeding point, and at least both the first and second antenna elements and both the first and second feeding points are arranged in a portion which is inside the outer panel made of the synthetic resin material and is apart from the earthed conductor on the part of the vehicle body, thereby it is possible to improve a receiving performance of a radio wave having a short wavelength, and can restrict an influence of a noise.

Abstract: In an antenna apparatus for a vehicle, the antenna apparatus being provided on the vehicle in which at least a part of an outside plank panel of the vehicle is constituted by an outer panel made of a synthetic resin material, the antenna apparatus has at least one non-earthed type antenna, the non-earthed type antenna is provided with a first antenna element connected to an inner conductor of a coaxial cable via a first feeding point, and a second antenna element connected to an outer conductor of the coaxial cable via a second feeding point, and at least both the first and second antenna elements and both the first and second feeding points are arranged in a portion which is inside the outer panel made of the synthetic resin material and is apart from the earthed conductor on the part of the vehicle body, thereby it is possible to improve a receiving performance of a radio wave having a short wavelength, and can restrict an influence of a noise.

Abstract: An antenna structure for a vehicle which includes an antenna which is disposed as a print or sticker antenna on a front window glass (FW) and is used to receive FM and AM waves, has a loop-shaped (e.g., reverse-convex-shaped) antenna element (1) which is disposed near the upper edge portion of the FW, one antenna element (2) which is connected in a DC manner to the lower side portion of the loop shape defined by the antenna element (1), and nearly vertically descends toward the lower edge portion of the FW substantially at its center in the widthwise direction of the vehicle, and a feeder distribution center (P) formed on the upper side portion of the loop shape defined by the antenna element (1), and the antenna elements (1, 2) are formed of silver paste containing dark carbon particles.

Abstract: An antenna structure for a vehicle which includes an antenna which is disposed as a print or sticker antenna on a front window glass (FW) and is used to receive FM and AM waves, has a loop-shaped (e.g., reverse-convex-shaped) antenna element (1) which is disposed near the upper edge portion of the FW, one antenna element (2) which is connected in a DC manner to the lower side portion of the loop shape defined by the antenna element (1), and nearly vertically descends toward the lower edge portion of the FW substantially at its center in the widthwise direction of the vehicle, and a feeder distribution center (P) formed on the upper side portion of the loop shape defined by the antenna element (1), and the antenna elements (1, 2) are formed of silver paste containing dark carbon particles.

Abstract: A glass antenna device for a vehicle includes an FM antenna (as a receiving antenna for short-waves) and a defogger provided on a rear window glass of the vehicle, and an AM antenna (as a receiving antenna for medium-waves) provided on a side window glass fixed at a different position from the rear window glass of the vehicle. Since the AM antenna is spaced relatively far distant from electric equipments such as a rear wiper, stop lamps and indicators disposed at a rear portion of the vehicle, noises generated from the electric equipments are unlikely to be mixed in a transmission line of the antenna device.

Abstract: An earth configuration achieving easy installment without deteriorating performance of an antenna device. The antenna device has a balanced antenna element, a shield plate arranged between the balanced antenna element and a conductor of a car, and a supporting member, and the shield plate blocks electrical coupling of the conductor from the balanced antenna element when the antenna device is mounted on the body of the car.

Abstract: Disclosed is an earth structure which can be easily attached without degrading the antenna performance. The earth structure for grounding a feeder line for transmitting a signal received from an antenna to a receiver or the like has a long earth member having a predetermined length and one end connected to a ground wire of the feeder line. A portion from one end to the other end of the long earth member is not grounded, and the other end is open.

Abstract: A GPS wave antenna apparatus according to the present invention includes a substrate unit having a printed board on which an antenna constituting element including a GPS wave antenna element is mounted integrally as one component, a case having an opening portion at one end, for detachably receiving the substrate unit through the opening portion, and a conductive plate attached to the case so as to block the opening portion and arranged opposite to the GPS wave antenna element at a fixed distance therebetween. The GPS wave antenna element has a thin-film conductive pattern, and the substrate unit includes a low noise amplifier provided on the printed board and a feeder connected to a feeder section of the antenna element through the low noise amplifier.

Abstract: A glass antenna having a high reception sensitivity while not blocking a driver's sight. On a window glass, a longitudinal length y of a pattern of the glass antenna is set so as to satisfy y.ltoreq..lambda./4.multidot..alpha. (.lambda.: reception frequency wavelength; .alpha.: glass reduction ratio), and a transversal length x of the pattern is set so as to satisfy 60 cm-y.gtoreq.x.

Abstract: A glass antenna has a rectangular loop antenna element which is extended on the upper region of a windshield glass where no heating wires of a defogger are arranged, and is capacitively coupled to the uppermost heating wire of the defogger at a predetermined capacitance, and a T-shaped second antenna element which is arranged on a region where the defogger is arranged, and is capacitively coupled to the uppermost heating wire of the defogger.

Abstract: A glass antenna system with good rear visibility. A glass antenna has a first antenna conductor element extending on a blank region where no defogger hot wires extend, a second antenna conductor element which is capacitively coupled to the first antenna conductor element in a defogger region, a third antenna conductor element which extends at a position substantially symmetrical to the first antenna conductor element about the central line of the defogger, and a fourth antenna conductor element which extends at a position substantially symmetrical to the second antenna conductor element about the central line, and is capacitively coupled to the third antenna conductor element.

Abstract: A conductor is mounted on the window glass of a vehicle in a manner that allows a slot portion between the conductor and the body. A space is allowed within the conductor, and a defogger is mounted within the space. The conductor and the body are fed. This arrangement constitutes a simple structured vehicular slot type antenna on the window glass. The area of the conductor may be reduced by taking advantage of the rear defogger as a conductor.

Abstract: A vehicle glass antenna for receiving FM and AM radio waves, includes a first antenna line which vertically extends on a glass of the vehicle so as to receive the FM radio waves, and has a feeding point on the edge of the glass, and a second antenna line which is connected to the first antenna line at a position in the neighborhood of the feeding point so as to receive the radio waves in the AM band, and extends by a predetermined length in a loop pattern along the edge of the glass.

Abstract: A glass antenna having a defogger and an antenna conductor each extending on a glass comprises a first antenna conductor element extending along the glass surface and a second antenna conductor element which extends upward and downward along the glass surface substantially at the center of the defogger in a vehicle width direction in the region to which the defogger extends and a portion of which is coupled to a heating wire of the defogger through a direct current, wherein the first antenna conductor element is disposed to the defogger so that the heating wire connected the second antenna conductor element is coupled to the first antenna conductor element through capacitive coupling with a capacitance of about 40 pF or less.

Abstract: A navigation apparatus for vehicles according to the present invention has a display device for displaying road information. The navigation system is designed to selectively display the road information which is close to the current position of the vehicle and/or the demands of the driver from a large amount of road information (each of which consists of image data to be displayed and logical data on which logical determination can be made).

Abstract: A vehicular radio receiver includes a receiver main body provided adjacent to an antenna mounted on a vehicle body, a receiver operation unit provided in a compartment of the vehicle spaced from the receiver main body for sending a pulse signal for operating the receiver main body thereto, and a control circuit for forcibly and continuously lowering an output derived from the receiver main body during a time in which the pulse signal is transmitted from the receiver operation unit. Noises caused by the pulse signal transmitted to the receiver main body from the receiver operation unit are prevented from being audibly output from a speaker.