Abstract: An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Abstract: A multiband compatible antenna that resonates at a first frequency and a second frequency includes: a planar conductor including a feeding portion to which a signal is supplied, a grounding portion, and a slit between the feeding portion and grounding portion. The slit includes a first slit portion extending in a first direction and a second slit portion extending in a second direction intersecting the first direction from an end of the first slit portion. The first slit portion is disposed closer to one edge than a center of the planar conductor in the second direction, and the feeding portion is disposed to a side of the first slit portion closer to the one edge. The planar conductor includes a first element portion and a second frequency portion that resonate at the first frequency and the second frequency, respectively. The second slit portion is disposed in the first element portion.

Abstract: An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Abstract: An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Abstract: An antenna includes a dielectric substrate, a ground element, a feed element, a microstrip line, and a feed point. The ground element is disposed on a first surface of the dielectric substrate. The ground element includes a slit. The feed element is disposed on a second surface of the dielectric substrate. The microstrip line extends from the feed element toward the slit. The feed point is disposed on the second surface of the dielectric substrate, and connected to the feed element via the microstrip line. The feed point is positioned between the feed element and the slit, and disposed at an end of the microstrip line.

Abstract: An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Abstract: A multiband compatible antenna that resonates at a first frequency and a second frequency includes: a planar conductor including a feeding portion to which a signal is supplied, a grounding portion, and a slit between the feeding portion and grounding portion. The slit includes a first slit portion extending in a first direction and a second slit portion extending in a second direction intersecting the first direction from an end of the first slit portion. The first slit portion is disposed closer to one edge than a center of the planar conductor in the second direction, and the feeding portion is disposed to a side of the first slit portion closer to the one edge. The planar conductor includes a first element portion and a second frequency portion that resonate at the first frequency and the second frequency, respectively. The second slit portion is disposed in the first element portion.

Abstract: An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Abstract: An antenna unit includes a conductive ground plate, a first antenna element, and a second antenna element. The first antenna element includes a first end connected to a feedpoint and a second end containing an open end. A part of the first antenna element is disposed along the conductive ground plate. The second antenna element branches off the first antenna element at a branch point on the first antenna element. The second antenna element is disposed between the part of the first antenna element disposed along the conductive ground plate and the conductive ground plate. The first antenna element resonates at a first frequency. The second antenna element and a segment between the first end and the branch point of the first antenna element resonate at a second frequency that is higher than the first frequency.

Abstract: A first antenna element includes a first end connected to a feedpoint, a second end connected to a connection point on a ground conductor, and a fold disposed between the first and the second ends. A part of a segment between the first end and the fold of the first antenna element is disposed along the ground conductor. A second antenna element branches off the first antenna element. The second antenna element is disposed between the part of the first antenna element disposed along the ground conductor and the ground conductor. The segment between the first end and the fold of the first antenna element resonates at a first frequency. The second antenna element and a segment between the first end and a branch point of the first antenna element resonate at a second frequency that is higher than the first frequency.

Abstract: An antenna includes a dielectric substrate, a ground element, a feed element, a microstrip line, and a feed point. The ground element is disposed on a first surface of the dielectric substrate. The ground element includes a slit. The feed element is disposed on a second surface of the dielectric substrate. The microstrip line extends from the feed element toward the slit. The feed point is disposed on the second surface of the dielectric substrate, and connected to the feed element via the microstrip line. The feed point is positioned between the feed element and the slit, and disposed at an end of the microstrip line.

Abstract: A first antenna element includes a first end connected to a feedpoint, a second end connected to a connection point on a ground conductor, and a fold disposed between the first and the second ends. A part of a segment between the first end and the fold of the first antenna element is disposed along the ground conductor. A second antenna element branches off the first antenna element. The second antenna element is disposed between the part of the first antenna element disposed along the ground conductor and the ground conductor. The segment between the first end and the fold of the first antenna element resonates at a first frequency. The second antenna element and a segment between the first end and a branch point of the first antenna element resonate at a second frequency that is higher than the first frequency.

Abstract: An antenna unit includes a conductive ground plate, a first antenna element, and a second antenna element. The first antenna element includes a first end connected to a feedpoint and a second end containing an open end. A part of the first antenna element is disposed along the conductive ground plate. The second antenna element branches off the first antenna element at a branch point on the first antenna element. The second antenna element is disposed between the part of the first antenna element disposed along the conductive ground plate and the conductive ground plate. The first antenna element resonates at a first frequency. The second antenna element and a segment between the first end and the branch point of the first antenna element resonate at a second frequency that is higher than the first frequency.

Abstract: An antenna unit includes a plate-shaped dielectric substrate, as well as an antenna element and a stub element. The dielectric substrate has a first edge extending along a longitudinal direction of the dielectric substrate and a second edge extending along the longitudinal direction of the dielectric substrate, and the second edge is opposite to the first edge. The antenna element is disposed along the longitudinal direction of the dielectric substrate. The Antenna element has a first end containing a feedpoint and a second end containing an open end. The stub element is disposed between a section of the antenna element having a predetermined length containing the first end of the antenna element and the first edge of the dielectric substrate along the longitudinal direction of the dielectric substrate. The stub element has a first end connected to a reference potential and a second end containing an open end.

Abstract: Provided is a portable wireless device (100) including: a circuit board (130); an input unit wiring pattern (140) comprising a flexible substrate that is separate from the circuit board (130); and an antenna element (160) of which a power feed unit (162) is connected to the substrate edge (130a) of the circuit board (130). A vertical wiring unit (142) is wired perpendicularly to the antenna element (160). A first cutoff circuit (171) is installed between the vertical wiring unit (142) and a horizontal wiring unit (143), and cuts off the wiring at a high frequency. The horizontal wiring unit (143) is connected to the circuit board (130) with a connector (150) disposed in the vicinity of the power feed unit (162) therebetween.

Abstract: A portable wireless device includes: first and second circuit boards each including a ground pattern; first and second power feeding portions provided on the first and second circuit boards, respectively; and first and second antenna elements connected to the first and second power feeding portions, respectively. The first circuit board is arranged substantially parallel to the second circuit board. A first connection portion provided on the first circuit board is electrically connected to a second connection portion provided on the second circuit board via a connection line. A slit is formed by cutting any one of: a part of the ground pattern of the first circuit board at a position between the first power feeding portion and the first connection portion; and a part of the ground pattern of the second circuit board at a position between the second power feeding portion and the second connection portion.

Abstract: There is adopted an enclosure dipole antenna structure including antenna elements respectively provided in a lower enclosure and an upper enclosure. There is also adopted a structure in which the lower structure and the upper structure are rotatably joined together along two axes of hinges. The enclosures thereby become openable and closable in two directions including a vertical direction and a horizontal direction. There can be implemented high antenna performance without use of an external antenna even regardless of whether the enclosures are opened in the vertical direction or the horizontal direction. A feeding section and a connection section are separated from each other by a distance of 1/20 or more of a wavelength corresponding to an operating frequency. Power can well be fed to the antenna elements.

Abstract: An object of the invention is to provide a portable radio apparatus capable of attaining a higher level of antenna performance in each of a plurality of frequency bands, without making the portable radio apparatus larger. A ground wire, which is set with an electrical length resonating at a second frequency band, which is different from that of an antenna element 14, of two or more carrier frequency bands in which a wireless circuit on a circuit board 11 operates, is arranged between a ground pattern of the circuit board 11 and the antenna element 14 and the operating states of the ground wire 15 are switched by a line switching switch 16, depending on the using frequency band. Thereby, it is possible to attain the higher level of antenna performance in each of the first frequency band with which the antenna element 14 resonates and the second frequency band with which the ground wire 15 resonates.

Abstract: An object of the present invention is to provide a portable radio apparatus that obtains a high antenna performance without limiting the degree of freedom in the exterior and design of a main body of portable radio apparatus. A portable radio apparatus (1) includes a radiation element (14) disposed on a side opposite to a rear part (10a) of a housing (10) through a circuit board (11), and a plate conductor (16) disposed substantially in parallel to the circuit board (11) between the circuit board (11) and the rear part (10a) of the housing (10).

Abstract: An object of the invention is to provide a portable wireless device that can attain a high level of antenna performance when a plurality of antenna elements is present, and for which a housing can be made thinner. Among paths between a first power supply unit 13 and a second power supply unit 14 provided at edges of a notched part 17 of a circuit board, a ground pattern of a path with a short electrical length relative to a wavelength of an operating frequency of a first wireless unit 15 or an operating frequency of a second wireless unit 16 is split to give an electrically unconnected state. In this way, ground current caused by one of the antenna elements (for example, second antenna element 12) will not flow to or will be reduced in the other antenna element (for example, first antenna element 11), so that deterioration in the characteristics of the other antenna element can be kept low.