Abstract: A display unit includes a conductive portion 1. When it is assumed that there is an imaginary straight line m1, which extends in a direction perpendicular to a longitudinal direction of a dipole antenna 2, passes through a center of the dipole antenna 2 and is parallel to an antenna surface of the dipole antenna 2, the dipole antenna 2 is disposed on a lateral side of the display unit so that the imaginary straight line m1 is parallel to a display screen, is parallel to an upper side 1a or a lower side 1b of a main surface of the conductive portion and passes a lateral portion of the conductive portion 1.

Abstract: A video/audio signal transmitted from a transmission source 10 to transmission destinations 20A and 20B is stored repeatedly for a predetermined time period. Thus, for example if the video/audio signal is overwritten at predetermined timing, it is sufficient to have a small storage capacity for the video/audio signal. Also, the video/audio signal on which an error has occurred remains without being overwritten at the time of determination that an error has occurred. Accordingly, by transmitting this signal to a predetermined destination, a detailed error analysis can be made promptly on the basis of the transmitted video/audio signal.

Abstract: The radiating conductor in an antenna device comprises first forming elements, second forming elements and third forming elements disposed to be coupled in one direction. The first forming elements are formed in a semi-circular shape, and the third forming elements are formed in a band-like shape and have feed points disposed therein. The first forming elements, the second forming elements and the third forming elements have respective maximum lengths gradually reduced in this order.

Abstract: A display unit includes a conductive portion 1. When it is assumed that there is an imaginary straight line m1, which extends in a direction perpendicular to a longitudinal direction of a dipole antenna 2, passes through a center of the dipole antenna 2 and is parallel to an antenna surface of the dipole antenna 2, the dipole antenna 2 is disposed on a lateral side of the display unit so that the imaginary straight line m1 is parallel to a display screen, is parallel to an upper side 1a or a lower side 1b of a main surface of the conductive portion and passes a lateral portion of the conductive portion 1.

Abstract: An antenna body is configured to comprise a dielectric member including a planar radiating conductor and a feeder. The radiating conductor is configured by combining a first forming element and a second forming element so as to share one portion, the first forming element having a circular shape, and the second forming element having a semi-oval shape. The feeder is connected to the radiating conductor at a peripheral portion in the second forming element, which is located on a side of the second forming element seen from the first forming element.

Abstract: An antenna body is configured to comprise a dielectric member including a planar radiating conductor and a feeder. The radiating conductor is configured by combining a first forming element and a second forming element so as to share one portion, the first forming element having a circular shape, and the second forming element having a semi-oval shape. The feeder is connected to the radiating conductor at a peripheral portion in the second forming element, which is located on a side of the second forming element seen from the first forming element.

Abstract: The radiating conductor in an antenna device comprises first forming elements, second forming elements and third forming elements disposed to be coupled in one direction. The first forming elements are formed in a semi-circular shape, and the third forming elements are formed in a band-like shape and have feed points disposed therein. The first forming elements, the second forming elements and the third forming elements have respective maximum lengths gradually reduced in this order.

Abstract: An antenna device of simple structure and high performance which is capable of lessening a reduction of a converging efficiency of radio wave due to a window glass sheet or the like to which the antenna device is fitted, and capable of obtaining a high converging efficiency to a received radio wave. The antenna device comprises a fitted member (5) having transparency, a converging member (1) for converging a radio wave, a space between the fitted member (5) and the converging member (1), and a receiving portion for receiving the radio wave converged by the converging member (1) or a transmitting portion for radiating a radio wave to the converging member (1) wherein in a case that a receive power value is changed so as to take alternately a bottom value and a peak value depending on a change of the thickness of the space, the thickness of the space is adjusted so that the received power value does not take a value in the vicinity of bottom values.

Abstract: An antenna device of simple structure and high performance which is capable of lessening a reduction of a converging efficiency of radio wave due to a window glass sheet or the like to which the antenna device is fitted, and capable of obtaining a high converging efficiency to a received radio wave. The antenna device comprises a fitted member 5 having transparency, a converging member 1 for converging a radio wave, a space between the fitted member 5 and the converging member 1, and a receiving portion for receiving the radio wave converged by the converging member 1 or a transmitting portion for radiating a radio wave to the converging member 1 wherein in a case that a receive power value is changed so as to take alternately a bottom value and a peak value depending on a change of the thickness of the space, the thickness of the space is adjusted so that the received power value does not take a value in the vicinity of bottom values.

Abstract: A glass antenna device for a vehicle includes a glass sheet to be fitted to a window opening of a vehicle, which has a first antenna conductor for a low receiving frequency band and a second antenna conductor for a high receiving frequency band arranged thereon; a first coil connected between the first antenna conductor and the second antenna conductor, the first coil having an inductance value which exhibits low impedance in at least the low receiving frequency band; wherein the first coil cooperates with a first other element to generate first resonance so that the first resonance has a resonant frequency existing in a lower frequency band region than the high receiving frequency band.