Abstract: Provided is an antenna device with a simple configuration, said antenna device supporting a plurality of frequency bands. An antenna device according to the present invention is provided with: at least one first radiation element that has a resonant frequency in a first frequency band; at least one second radiation element; and a connection line for connecting the first radiation element and the second radiation element. The line length formed of the first radiation element, the connection line, and the second radiation element is set to a length so as to have a resonant frequency in a second frequency band lower than the first frequency band.

Abstract: Provided is an antenna device with a simple configuration and in which it is possible to control the directivity in various directions. An antenna device according to the present invention is provided with: an array antenna that includes at least one antenna element disposed on a first surface of a substrate and that forms beams in respective directions having a plurality of angles including a first angle relative to the first surface of the substrate; and a side wall that is provided on at least a partial periphery of the at least one antenna element and that refracts, in a direction along the substrate, a first beam in the direction having the first angle.

Abstract: Provided is an antenna device with a simple configuration, said antenna device supporting a plurality of frequency bands. An antenna device according to the present invention is provided with: at least one first radiation element that has a resonant frequency in a first frequency band; at least one second radiation element; and a connection line for connecting the first radiation element and the second radiation element. The line length formed of the first radiation element, the connection line, and the second radiation element is set to a length so as to have a resonant frequency in a second frequency band lower than the first frequency band.

Abstract: This antenna device is provided with: an antenna element disposed in a recessed portion of the exterior of a moving body; and a passive element which is disposed in a position higher than a flat surface in the recessed portion on which the antenna element is positioned.

Abstract: Provided is an antenna device with a simple configuration, said antenna device supporting a plurality of frequency bands. An antenna device according to the present invention is provided with: at least one first radiation element that is provided on one surface of a substrate and that has a resonant frequency in a first frequency band; at least one second radiation element provided on the one surface of the substrate; a connection line for connecting the first radiation element and the second radiation element on the one surface of the substrate; a conductor that is provided at a position facing the first radiation element in the interior of the substrate and that has a slot; and a power supply line for supplying power to the first radiation element via the slot. The connection line is connected to the center portion, of the first radiation element, in a direction along the direction of polarization of radio waves radiated due to resonance.

Abstract: Provided is an antenna device with a simple configuration and in which it is possible to control the directivity in various directions. An antenna device according to the present invention is provided with: an array antenna that includes at least one antenna element disposed on a first surface of a substrate and that forms beams in respective directions having a plurality of angles including a first angle relative to the first surface of the substrate; and a side wall that is provided on at least a partial periphery of the at least one antenna element and that refracts, in a direction along the substrate, a first beam in the direction having the first angle.

Abstract: Provided is an antenna device with a simple configuration, said antenna device supporting a plurality of frequency bands. An antenna device according to the present invention is provided with: at least one first radiation element that is provided on one surface of a substrate and that has a resonant frequency in a first frequency band; at least one second radiation element provided on the one surface of the substrate; a connection line for connecting the first radiation element and the second radiation element on the one surface of the substrate; a conductor that is provided at a position facing the first radiation element in the interior of the substrate and that has a slot; and a power supply line for supplying power to the first radiation element via the slot. The connection line is connected to the center portion, of the first radiation element, in a direction along the direction of polarization of radio waves radiated due to resonance.

Abstract: An antenna includes: a radiating element that is formed of a conductor and radiates electromagnetic waves when supplied with electrical power; and a parasitic element that is (i) formed of a conductor, (ii) provided near the radiating element so as to be electromagnetically coupled with the radiating element, (iii) provided in a plane substantially perpendicular to a plane including the radiating element, and (iv) guides the electromagnetic waves without being supplied with electrical power.

Abstract: An antenna includes: a radiating element that is formed of a conductor and radiates electromagnetic waves when supplied with electrical power; and a parasitic element that is (i) formed of a conductor, (ii) provided near the radiating element so as to be electromagnetically coupled with the radiating element, (iii) provided in a plane substantially perpendicular to a plane including the radiating element, and (iv) guides the electromagnetic waves without being supplied with electrical power.

Abstract: A second slit 117 and a fourth slit 119 provided in a first antenna element 150 and a first slit 116 and a third slit 118 provided in a second antenna element 151 are adjusted such that the mutual coupling between the first antenna element 150 and the second antenna element 151 in the desired frequency band is canceled, and reduces degradation in coupling between antenna elements without connecting the antenna elements through components and the like. With such a configuration, it is possible to achieve high-efficiency loosely coupled MIMO array antennas operating in the same frequency band in a portable wireless terminal.

Abstract: A behind-the-ear wireless device includes a main body casing including a wireless circuit housed therein and an audio transmission unit having a function of transmitting sound to an ear. The main body casing and the audio transmission unit are integrally connected to each other, whereby the wireless device can be fitted to the ear. An antenna element having a length of about half wave length is disposed in a hollow of the sound tube. A parasitic element having a length of about a half wave length is disposed in the main body casing.

Abstract: A first connection circuit 114 is adjusted to cancel the impedance of the mutual coupling between a first antenna element 150 and a second antenna element 151 in the range from the first frequency band to the second frequency band, thereby reducing degradation in the coupling between the antenna elements. With such a configuration, it is possible to achieve high-efficiency loosely coupled antennas operating in the same wide frequency band in a portable wireless terminal.

Abstract: A second slit 117 and a fourth slit 119 provided in a first antenna element 150 and a first slit 116 and a third slit 118 provided in a second antenna element 151 are adjusted such that the mutual coupling between the first antenna element 150 and the second antenna element 151 in the desired frequency band is canceled, and reduces degradation in coupling between antenna elements without connecting the antenna elements through components and the like. With such a configuration, it is possible to achieve high-efficiency loosely coupled MIMO array antennas operating in the same frequency band in a portable wireless terminal.

Abstract: A first connection circuit (108) is controlled so as to cancel mutual coupling impedance existing between a first antenna element (106) and a second antenna element (107) at a first frequency band, thereby lessening deterioration of coupling between the antenna elements. A second connection circuit (111) is controlled so as to cancel mutual coupling impedance existing between a first passive element (109) and a second passive element (110) at a second frequency band, thereby lessening deterioration of coupling between the passive elements. By means of the configuration, it is possible to implement a low-coupling antenna that operates at two frequency bands in a wireless mobile terminal.

Abstract: There is provided an antenna element capable of implementing miniaturization, acquisition of a high gain, and broadening of a band and coping with multiple bands.

Abstract: There are provided an antenna element and a portable radio that enable miniaturization, acquisition of a high gain, and broadening of a band and that copies compatible with multiple bands.

Abstract: There is provided a flip portable radio that can be reduced in thickness and size; that requires a broadband characteristic for an antenna; and that can exhibit high communication performance according to various states of usage. A flip portable radio has a matching circuit that feeds power to a metal rotary shaft 14 which makes an upper enclosure 12 and a lower enclosure 11turnable and which matches impedance to 50 ohms at two operation frequencies or more. A diameter L1 of a cross section of a metal rotary shaft 14 is set to about 1/20 or more of a wavelength ?2. An effective length of a metal rotary shaft 14 is set to about ?c/4 of a wavelength ?c of a center frequency of a high frequency band. The metal rotary shaft 14 is placed at a given interval away from a first circuit board 11A and a second circuit board 12A.

Abstract: There is provided a foldable portable radio capable of yielding high emission efficiency over a wide band in either a closed or open state. A portable radio 100 is comprised of: a lower housing 101 making up a first housing; an upper housing 102 making up a second housing; a hinge 103 for coupling the lower housing 101 to the upper housing 102 in a turnable manner; a first circuit board 104; a second circuit board 105; an antenna element 106; a radio circuit 107; an impedance matching circuit 108; a signal line 109 that connects the first circuit board 104 to the second circuit board 105; and a conductor element 110. The conductor element 110 has a length that is a quarter wavelength of an operating frequency and is placed in the hinge 103 of the upper housing 102.

Abstract: It is an object of the invention to provide a portable wireless apparatus capable of maintaining high quality of a communication in various using configurations obtained by a two-axis hinge mechanism. A portable wireless apparatus (100) having a two-axis hinge portion includes a first antenna (102) which is suitable for a talking state and a second antenna (104) which is suitable for a waiting state. The first antenna (102) or the second antenna (104) is selected based on a result of opening/closing detection decided from an angle ? of a first axis (106) and the result of opening/closing detection decided from an angle ? of a second axis (107). Consequently, it is possible to select either of the antennas which is not influenced by hands or fingers of a user.

Abstract: There is provided an antenna element capable of implementing miniaturization, acquisition of a high gain, and broadening of a band and coping with multiple bands.