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WIRELESS COMMUNICATION APPARATUS AND ANTENNA DEVICE

外国特許コード F190009838
整理番号 S2017-0774-C0
掲載日 2019年7月25日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP017420
国際公開番号 WO 2018216438
国際出願日 平成30年5月1日(2018.5.1)
国際公開日 平成30年11月29日(2018.11.29)
優先権データ
  • 特願2017-102931 (2017.5.24) JP
発明の名称 (英語) WIRELESS COMMUNICATION APPARATUS AND ANTENNA DEVICE
発明の概要(英語) A transmitting antenna 100 and a receiving antenna 200 are each provided with: a first circular loop antenna group 100A, 200A in which respective circular loop antenna elements have different perimeters each being approximately an integral multiple of a wavelength determined from a wireless communication frequency, and are concentrically disposed on the same plane; and a second circular loop antenna group 100B, 200B which has circular loop antenna elements having the same perimeters as those of the plurality of circular loop antenna elements of the first circular loop antenna group. Between the first circular loop antenna group and the second circular loop antenna group, the angular position of a terminal connecting a power supply unit to the circular loop antenna element of the same perimeter is set to an angular position rotated by (2l+1)π/2mi (where l is an arbitrarily defined integer, mi is the value of m1-mN that is approximately an integral multiple of a wavelength).
従来技術、競合技術の概要(英語) BACKGROUND ART
In recent years, Internet-rich content and, an ultra-high speed optical line network as well as widespread use of wireless network end user, "anytime, anywhere, anyone", as well as the "only this, only this case, only you" the individual that the needle-erasure of the information may be provided in accordance with the development of advanced information society is rapidly progressing. Further, a person using a sensor network without a big collection of the data communication leads in parallel. Supporting them as a wireless system, a mobile phone Bluetooth wireless, WiMAX(Worldwide Interoperability for Microwave Access), LAN(Local Area Network), (registered trademark), UWB(Ultra Wide Band), a variety of systems such as ZigBee is provided.
In addition, these systems are connected in a seamless manner, the systems are also evolving service provided in combination. These wireless systems, the specific communication in the band occupation to communicate with each other and, in particular for high-speed transmission of large amounts of data it is necessary to use a wide frequency band, the frequency resource requires a large amount of valuable resources and is a problem. For this reason, effective use of bandwidth the amount of transmitted information as an index obtained by dividing the transmission rate (bit/Hz) per frequency to a technique of increasing importance.
Frequency technique which can improve the transmission rate of 1 per one example, a plurality of antennas is arranged on the transmitting side and receiving side has been known a technique called MIMO(multiple-input and multiple-output). MIMO is, at the same time within the same band, the difference in propagation characteristics through the use of multiplexing of spatial multiplexing techniques. For example, each of the transmitting side and receiving side are n (n is an arbitrary integer) including an antenna case, the voltage and current of the transmitting antenna of the voltage-current relationship and the reception antenna, the transfer function of the propagation path (for example Z matrix) can be uniquely determined in, row n-column square matrix is represented as xn.
The eigenvectors of this matrix is a square matrix of row and column using n xn diagonal can be reduced, independently of the transfer function for n eigenvectors and therefore, it becomes possible to double the multiplexing of n. However, in MIMO, mixed signal to separate mathematically, complex signal processing is required for the problem. Also, in cooperation with a plurality of antennas since the operation, the system is also a problem that a complicated configuration.
On the basis of such circumstances, in recent years, as a method of multiplexing in the same frequency communication, OAM(Orbital Angular Momentum) has been proposed. This approach, the electromagnetic field of the orbital angular momentum is stored only in the case where interaction is acceptable to use the phenomenon, the electromagnetic waves in the orbital angular momentum (OAM) information that a method of transmission. Such as a Gaussian distribution of the laser beam cross-section in the wave system, the azimuth φ is a phase relative to the cross-sectional spatial distribution, a normal wave is constant. On the other hand, OAM wave, exp (jm φ) (however, m is OAM wave in the mode referred to as magnetic quantum number) in accordance with, and change linearly with respect to the azimuth φ, spiral surface having the same phase. Such OAM wave, in the case of the optical communication, laser and the hologram or spiral phase plate is used can be realized relatively easily. On the other hand, in the case of a microwave, the natural mode of the transmission method and reception method, and a focused beam largely differs from an optical transmission method, it is not easy to implement OAM wave.
For example, to Patent Document 1, OAM configuration of the light when communication is performed is simulated, a spiral notches of the parabolic dish antenna, a reflection surface is shifted by integer times of the wavelength, the electromagnetic waves generated by the OAM wave technology have been described.
In addition, in Patent Document 2, an array of antenna elements arranged on the circumference, between each antenna element by shifting the phase of a constant interval, on the circumference of the receiving position, the phase change exp (jm φ) the surface of a technique for creating an electromagnetic field is described. This technique is, by changing the phase shift is in a discrete amount, to create a different OAM mode, multiplexing is carried out between the modes.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
  • 発明者(英語)
  • SAITOU Akira
  • OTSUKA Hiroto
  • HONJO Kazuhiko
  • ISHIKAWA Ryo
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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