Abstract: A small antenna system which is incorporated in a portable radio apparatus and can ensure high antenna performance in a wide frequency band without impairing the design property or the operability and a portable radio apparatus are provided. An antenna device includes an antenna A1 having a resonance characteristic in a first frequency; an antenna A2 having a resonance characteristic in a second frequency and being spaced from the antenna A1 at a predetermined distance; a circuit board P provided in a mobile telephone 10, a wireless section 16 provided on the circuit board P for supplying or receiving high-frequency power; and a high-frequency switch 13 provided on the circuit board P for selecting connection of an output terminal or an input terminal of the wireless section 16 and a feeding point of the antenna A1 or the antenna A2 so that the feeding point of the antenna A1 or the antenna A2 can be switched and connecting to the wireless section 16.

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: The mobile radio apparatus of the invention includes conductive housings 101 and 102, a circuit board 103 arranged between the conductive housings 101 and 102, a radio circuit 104 arranged on the circuit board 103, a resin 105 such as waterproof rubber packing arranged at a boundary between the conductive housings 101 and 102, a flexible board 106 arranged along a part of the resin 105, a conductor pattern 107 formed on the flexible board 106, a notch 108 formed in the conductive housings 101 and 102 of the periphery of the conductor pattern 107, a liquid crystal screen 109 arranged on the conductive housing 101, operation keys 110, an earpiece 111, and a mouthpiece 112.

Abstract: It is made possible to realize both miniaturization and a wider band in an antenna element. An antenna element includes a first conductor wire part 11A; a second conductor wire part 11B crossing the first conductor wire part 11A and connected; a third conductor wire part 11C crossing the second conductor wire part 11B and connected, and parallel to the first conductor wire part 11A; a fourth conductor wire part 11D crossing the third conductor wire part 11C and connected; and a first conductor flat plate 12 connected to one or two of the first conductor wire part 11A, the second conductor wire part 11B, the third conductor wire part 11C, and the fourth wire part 11D and disposed in the area surrounded by any three of the first conductor wire part 11A, the second conductor wire part 11B, the third conductor wire part 11C, and the fourth wire part 11D. An end part of the first conductor flat plate 12 is parallel with the first conductor 11A not connected to the first conductor flat plate 12.

Abstract: An antenna device and a communication device capable of changing over polarization characteristics of an antenna to improve transmission capacity in various kinds of polarization environments and used configuration by preventing reduction of the communication capacity for a reception signal degrading or varying depending on momentarily changing polarization conditions between a base station and a terminal. The antenna device (110) includes a plurality of first antenna elements (111,112) for a first polarizing direction, a second antenna element (121) provided in the direction orthogonal to the first polarizing direction, a plurality of switches (131,132) for switching connection between the plurality of first antenna elements (111,112) and the second antenna element (121), and power supply parts (141,142) respectively provided on the plurality of first antenna elements (111,112).

Abstract: An antenna unit and a communication apparatus are provided, which are operable with respect to wireless systems having three, or more frequencies by employing 2 sets of antenna elements, and which can realize such an antenna structure having a high freedom degree, while the antenna structure can be applied to frequency arrangements as to the plurality of wireless systems.

Abstract: A housing antenna is small enough in size so as to be accommodated in a mobile device. The antenna has a number of feeding points that allow the antenna to operate as a number of antennal elements. The antenna is capable of realizing high-speed communication by increasing communication capacity.

Abstract: A housing antenna is small enough in size so as to be accommodated in a mobile device. The antenna has a number of feeding points that allow the antenna to operate as a number of antenna elements. The antenna is capable of realizing high speed communication by increasing communication capacity.

Abstract: A controller of a MIMO antenna apparatus calculates a current transmission capacity based on signal levels detected by a signal level detector circuit. The controller calculates an estimated transmission capacity assuming that at least one of antenna elements currently connected to a MIMO modulator and demodulator circuit is changed to a further antenna element not connected to the MIMO modulator and demodulator circuit, based on the detected signal levels and degrees of electromagnetic coupling stored in a degree-of-coupling memory. The controller controls a switch circuit to connect the further antenna element to the MIMO modulator and demodulator circuit when the current transmission capacity becomes lower than the estimated transmission capacity.

Abstract: Provided is a portable wireless device which has a waterproofing effect and, at the same time, can improve resistance to static electricity. The portable wireless device (100) comprises a box-shaped housing (101) formed by fitting two cases at respective annular fitting surfaces of the two cases. In the portable wireless device (100), a circuit board (102) is provided in the housing (101). A waterproofing packing (103) has an annular shape and is provided between the fitting surfaces of the two cases and held by the two cases which constitute the housing (101). A conductor pattern (105) is integrally formed with the waterproofing packing (103) and is electrically connected to the circuit board (102).

Abstract: A portable radio having a housing 10 made up of a combination of a first case 11 and a second case 12 includes: an annular resilient member 13 sandwiched between the first case 11 and the second case 12; a flexible printed board 14 that is formed integrally with the annular resilient member 13 and that is provided in at least an area surrounded by the annular resilient member 13; an antenna section 15 that is provided on the flexible printed board 14 while being folded along a plurality of inner wall surfaces which are oriented in mutually different orientations and which belong to at least one of the first case 11 and the second case 12; and a circuit board 17 placed within an area surrounded by the annular resilient member 13.

Abstract: Provided is a portable wireless device capable of preventing deterioration in performance of an antenna caused by reverse phase current. The portable wireless device (100) comprises at least two box-shaped housings each of which is formed by fitting respective annular fitting surfaces of two cases. Further, in the portable wireless device (100), a first circuit board (110) is provided in a first housing (101). A second circuit board (115) is provided in a second housing (102). A signal line (119) electrically connects the first circuit board (110) and the second circuit board (115). A waterproofing packing (116) has an annular shape, and is provided between the fitting surfaces of the two cases and held by the two cases which constitute the second housing (102). A conductive element (118) is integrally formed with the waterproofing packing (116), electrically connected to an end of the second circuit board (115), and electrically connected to the signal line (119).

Abstract: A portable wireless device having a casing formed by assembling a first casing and a second casing, includes an annular elastic member sandwiched between the first casing and the second casing, a flexible printed board integrally formed with the annular elastic member and disposed in a region surrounded by the annular elastic member, an antenna part disposed on the flexible printed board, a circuit mounting part disposed at the antenna part, and a circuit board disposed in the region surrounded by the annular elastic member. A portion of the antenna part is disposed along a portion of the annular elastic member. The circuit mounting part is disposed on the inner side of the annular elastic member. The antenna part and the ground part of the circuit board are separated therebetween with a predetermined length or more.

Abstract: Disclosed is a portable wireless device which can receive signals at a wideband with good sensitivity, and change a narrowband wherein signals are received with high sensitivity. In this device, a wireless unit (105) demodulates signals received by an antenna (101) or modulates signals to be transmitted by the antenna (101). Matching circuits (103-1 to 103-n) are connected between the antenna (101) and the wireless unit (105) and match impedance so that the impedance of the antenna (101) and the impedance of the wireless unit (105) have a complex conjugate relation. A plurality of these are respectively provided for a plurality of different frequency bands where matching is performed.

Abstract: There is provided a portable radio capable of facilitating assuring water-tightness of a neighboring area of power feed sections and assuring a stable state of connection between a conductor, such as an antenna, and a circuit board. A portable radio includes an annular resilient member 13 sandwiched between a first case 11 and a second case 12; a flexible printed board 14 that is formed integrally with the annular resilient member 13 and that extends toward an area surrounded by the annular resilient member 13; an antenna section 15 and a first power feed section 19 that are provided on the flexible printed board 14; a circuit board 17 set in the area surrounded by the annular resilient member 13; an electric circuit section 18 provided on the circuit board 17; and a second power feed section 20 electrically connected to the electric circuit section 18.

Abstract: Disclosed is a portable wireless terminal wherein deterioration in antenna performance when placed on a metal desk or other structure can be prevented without sacrificing designability and without increasing the number of components. In this terminal, a hinge part (103) functions as an antenna which resonates at a frequency of a first wireless system (150). A whip antenna (112) faces the surface of a first circuit board (104) that is opposite the surface faced by an input device (115), is disposed substantially parallel to the first circuit board (104), and resonates at a frequency of a second wireless system (160). A second contact spring (110) electrically connects a second wireless circuit (108) to the antenna element of a whip antenna (112) and is disposed perpendicularly to the first circuit board (104). A switch (113) grounds the whip antenna (112) and second contact spring (110) to the first circuit board (104) when the second wireless system (160) is not operating.

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.