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WIRELESS COMMUNICATION APPARATUS AND ANTENNA DEVICE

Foreign code F190009838
File No. S2017-0774-C0
Posted date Jul 25, 2019
Country WIPO
International application number 2018JP017420
International publication number WO 2018216438
Date of international filing May 1, 2018
Date of international publication Nov 29, 2018
Priority data
  • P2017-102931 (May 24, 2017) JP
Title WIRELESS COMMUNICATION APPARATUS AND ANTENNA DEVICE
Abstract 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).
Outline of related art and contending technology 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.
Scope of claims (In Japanese)[請求項1]
 送信アンテナと、前記送信アンテナから送信された無線信号を受信する受信アンテナとを有する無線通信装置であり、
 前記送信アンテナ及び前記受信アンテナは、
 無線通信周波数から決まる波長の約整数倍であるm 1,m 2,・・・,m N倍(Nは2以上の整数)のそれぞれ異なる周囲長を有するN個の円形ループアンテナ素子が、同一平面に同心円状に配置される第1の円形ループアンテナ群と、
 前記第1の円形ループアンテナ群とは別の同一平面に同心円状に配置されたN個の円形ループアンテナ素子が、前記第1の円形ループアンテナ群のN個の円形ループアンテナ素子と同一の周囲長を持つ第2の円形ループアンテナ群と、
 前記第1の円形ループアンテナ群及び第2の円形ループアンテナ群のそれぞれの円形ループアンテナ素子に個別に接続される複数の給電部とを備え、
 前記送信アンテナのN個の円形ループアンテナ素子の中心軸と、前記受信アンテナのN個の円形ループアンテナ素子の中心軸とを、ほぼ直線状に配置し、
 前記第1の円形ループアンテナ群と前記第2の円形ループアンテナ群とで、同じ周囲長を有する円形ループアンテナ素子に前記給電部を接続する角度位置が、(2l+1)π/2m iだけ回転した角度位置(但し、lは任意の整数、m iは波長の約整数倍であるm 1~m Nの値)に設定する
 無線通信装置。

[請求項2]
 前記第1の円形ループアンテナ群のN個の円形ループアンテナ素子は、前記給電部を接続する角度位置を同じ位置とし、前記第2の円形ループアンテナ群のN個の円形ループアンテナ素子は、前記第1の円形ループアンテナ群の円形ループアンテナ素子に対して、(2l+1)π/2m iだけ回転した角度位置に前記給電部を接続する
 請求項1に記載の無線通信装置。

[請求項3]
 前記第1の円形ループアンテナ群と前記第2の円形ループアンテナ群とで、同じ周囲長を有する円形ループアンテナ素子に前記給電部を接続する角度位置が、(2l+1)π/2m iだけ回転した角度位置とした上で、前記第1の円形ループアンテナ群のN個の円形ループアンテナ素子に前記給電部を接続する角度位置を、それぞれ異なる角度位置に設定すると共に、前記第2の円形ループアンテナ群のN個の円形ループアンテナ素子に前記給電部を接続する角度位置を、それぞれ異なる角度位置に設定する
 請求項1に記載の無線通信装置。

[請求項4]
 前記送信アンテナの前記第1の円形ループアンテナ群及び前記第2の円形ループアンテナ群のN個ずつの円形ループアンテナ素子に、それぞれ別の送信部を接続すると共に、前記受信アンテナの前記第1の円形ループアンテナ群及び前記第2の円形ループアンテナ群のN個ずつの円形ループアンテナ素子に、それぞれ別の受信部を接続し、
 それぞれの前記送信部から前記送信アンテナの各円形ループアンテナ素子の一端及び他端に、差動信号となる送信信号を供給し、前記受信アンテナの各円形ループアンテナ素子の一端及び他端から、差動信号となる受信信号をそれぞれの前記受信部に供給するようにした
 請求項1~3のいずれか1項に記載の無線通信装置。

[請求項5]
 無線通信周波数から決まる波長の約整数倍であるm 1,m 2,・・・,m N倍(Nは2以上の整数)のそれぞれ異なる周囲長を有するN個の円形ループアンテナ素子が、同一平面に同心円状に配置される第1の円形ループアンテナ群と、
 前記第1の円形ループアンテナ群とは別の同一平面に同心円状に配置されたN個の円形ループアンテナ素子が、前記第1の円形ループアンテナ群のN個の円形ループアンテナ素子と同一の周囲長を持つ第2の円形ループアンテナ群と、
 前記第1の円形ループアンテナ群及び第2の円形ループアンテナ群のそれぞれの円形ループアンテナ素子に個別に接続される複数の給電部とを備え、
 前記第1の円形ループアンテナ群と前記第2の円形ループアンテナ群とで、同じ周囲長を有する円形ループアンテナ素子に前記給電部を接続する角度位置が、(2l+1)π/2m iだけ回転した角度位置(但し、lは任意の整数、m iは波長の約整数倍であるm 1~m Nの値)に設定する
 アンテナ装置。

[請求項6]
 前記第1の円形ループアンテナ群のN個の円形ループアンテナ素子は、前記給電部を接続する角度位置を同じ位置とし、前記第2の円形ループアンテナ群のN個の円形ループアンテナ素子は、前記第1の円形ループアンテナ群の円形ループアンテナ素子に対して、(2l+1)π/2m iだけ回転した角度位置に前記給電部を接続する
 請求項5に記載のアンテナ装置。

[請求項7]
 前記第1の円形ループアンテナ群と前記第2の円形ループアンテナ群とで、同じ周囲長を有する円形ループアンテナ素子に前記給電部を接続する角度位置が、(2l+1)π/2m iだけ回転した角度位置とした上で、前記第1の円形ループアンテナ群のN個の円形ループアンテナ素子に前記給電部を接続する角度位置を、それぞれ異なる角度位置に設定すると共に、前記第2の円形ループアンテナ群のN個の円形ループアンテナ素子に前記給電部を接続する角度位置を、それぞれ異なる角度位置に設定する
 請求項5に記載のアンテナ装置。

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
  • Inventor
  • SAITOU Akira
  • OTSUKA Hiroto
  • HONJO Kazuhiko
  • ISHIKAWA Ryo
IPC(International Patent Classification)
Specified countries 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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