WO2010004739A1 - 可変指向性アンテナ装置 - Google Patents
可変指向性アンテナ装置 Download PDFInfo
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- WO2010004739A1 WO2010004739A1 PCT/JP2009/003174 JP2009003174W WO2010004739A1 WO 2010004739 A1 WO2010004739 A1 WO 2010004739A1 JP 2009003174 W JP2009003174 W JP 2009003174W WO 2010004739 A1 WO2010004739 A1 WO 2010004739A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
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- the present invention relates to a variable directional antenna device for a wireless communication system using, for example, a MIMO (Multiple Input Multiple Multiple Output) wireless system.
- MIMO Multiple Input Multiple Multiple Output
- variable directivity antenna devices for wireless communication systems using, for example, the MIMO wireless system (see, for example, Patent Documents 1 and 2).
- Patent Document 1 discloses an array antenna device that has a simpler structure than conventional antennas and that can easily form excitation elements and non-excitation elements.
- the array antenna device at least one dielectric substrate on which at least one of a plurality of non-excitation elements is formed is provided around the excitation element, or at least one of the excitation element and the plurality of non-excitation elements And at least one second dielectric substrate on which at least another one of the non-excitation elements is formed around the excitation element. It is said.
- the antenna element structure is devised so that the directivity / omnidirectionality, radiation polarization, and radiation direction of the antenna device are in a desired state without causing an increase in size and cost.
- An antenna device that can be controlled has been proposed.
- a conductive excitation element having a predetermined length and disposed on a dielectric substrate, a parasitic element made of a semiconductive plastic, and the parasitic element are connected.
- a control electrode, and a DC bias voltage supplied to the control electrode is controlled to switch the parasitic element to insulating or / and conductive.
- An omnidirectional antenna device is configured by making the reflector insulative.
- JP 2002-261532 A Japanese Patent Laid-Open No. 2007-013692.
- the electric field level is weak because the distance between wireless devices is too long for the output power of radio waves.
- the second problem is that fading occurs in the band required for communication due to interference of reflected waves from walls and ceilings.
- the antenna element since there are many problems in places where there is almost no difference in level between the direct wave and the reflected wave, the antenna element has directivity as described above and does not receive radio waves other than the desired wave. Thus, interference can be suppressed.
- SISO Single Input Single Output
- MRC is not the simple antenna selection diversity but the receiver side. This is a problem when processing (Maximum Ratio Combination) is performed.
- directivity is given to two antenna elements, and one antenna element receives a direct wave, and the other When the antenna element receives a reflected wave having a longer delay time than the estimated time of the guard interval with respect to the direct wave, signal degradation in the desired band is inevitable.
- OFDM Orthogonal Frequency Division Multiplex
- the MIMO wireless communication system represented by the IEEE802.11n standard receives a radio wave by a plurality of antennas and greatly reduces the communication speed by decomposing into a plurality of streamings by a propagation channel generated from the path difference.
- the path difference in propagation from each antenna element is positively utilized.
- a plurality of omnidirectional antennas such as a dipole antenna and a sleeve antenna are used. The correlation becomes large, and a sufficient propagation channel for ensuring transmission quality cannot be generated.
- there is a method of tilting each antenna element in a different direction to combine different polarizations but there is a mounting problem that the antenna element must be physically tilted. there were.
- the antenna device of the wireless device using the MIMO wireless system cannot be generally downsized.
- the object of the present invention is to solve the above-described problems and to greatly reduce the distance between antenna elements in an environment where fading is likely to occur with a large number of reflected waves, so that the antenna device can be miniaturized and transmission in the MIMO radio system can be performed.
- An object of the present invention is to provide a variable directivity antenna device capable of improving quality.
- the variable directivity antenna device is A first parasitic element; A plurality of antenna elements provided in close proximity so as to be electromagnetically coupled to the first parasitic element; A first switch means connected to the first parasitic element and for switching whether or not the first parasitic element is grounded; By outputting a control signal for switching whether or not to operate the first parasitic element as a parasitic element by turning on or off the first switch means, the radiation pattern from the variable directional antenna device is changed. And a control means for changing.
- variable directional antenna device is characterized by comprising two antenna elements.
- variable directivity antenna device at least one second parasitic element provided in close proximity so as to be electromagnetically coupled to each antenna element; And further comprising at least one second switch means connected to the second parasitic element and switching whether or not each second parasitic element is grounded,
- the control means outputs another control signal for selectively switching whether or not to operate each parasitic element as a parasitic element by selectively turning on or off each switch means.
- variable directivity antenna device is characterized by comprising two antenna elements and one second parasitic element.
- variable directional antenna device is characterized by comprising two antenna elements and four second parasitic elements.
- variable directivity antenna device is characterized by including three antenna elements and three second parasitic elements.
- variable directivity antenna device is characterized by comprising four antenna elements and four second parasitic elements.
- each antenna element is provided away from the first parasitic element by an electrical length of 1 ⁇ 4 wavelength.
- Variable directional antenna element is provided away from the first parasitic element by an electrical length of 1 ⁇ 4 wavelength.
- each antenna element is provided apart from the first parasitic element by an electrical length of 1 ⁇ 4 wavelength
- Each of the second parasitic elements is provided apart from each of the antenna elements by an electrical length of 1 ⁇ 4 wavelength.
- each switch means is a PIN diode connected between each parasitic element and an installation conductor.
- variable directivity antenna device of the present invention the distance between each antenna element and each parasitic element is set such that the antenna element and the parasitic element are electromagnetically coupled to each other, and each of the switch means
- the radiation pattern from the variable directivity antenna device is changed by outputting a control signal for selectively switching whether or not each parasitic element is operated as a parasitic element by selectively turning on or off Since the control means is provided, the radiation pattern from the variable directivity antenna device can be selectively changed to direct the main beam in a desired direction.
- variable directional antenna device that can greatly reduce the distance between the antenna elements, thereby reducing the size of the antenna device and improving the transmission quality of the MIMO radio system. Can be provided.
- FIG. 2 is a circuit diagram showing a configuration of a control circuit 30 of parasitic elements 12a to 12d in FIG.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned off, the parasitic element 12b is turned off, the parasitic element 12c is turned off, and the parasitic element 12d is turned off.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned on, the parasitic element 12b is turned off, the parasitic element 12c is turned off, and the parasitic element 12d is turned off. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned off, the parasitic element 12b is turned on, the parasitic element 12c is turned off, and the parasitic element 12d is turned off. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned off, the parasitic element 12b is turned off, the parasitic element 12c is turned on, and the parasitic element 12d is turned off. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned on, the parasitic element 12b is turned off, the parasitic element 12c is turned on, and the parasitic element 12d is turned off.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 when the parasitic element 12a is turned off, the parasitic element 12b is turned on, the parasitic element 12c is turned on, and the parasitic element 12d is turned off. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned on, the parasitic element 12b is turned on, the parasitic element 12c is turned on, and the parasitic element 12d is turned off. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned on, the parasitic element 12b is turned off, the parasitic element 12c is turned off, and the parasitic element 12d is turned on. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned off, the parasitic element 12b is turned off, the parasitic element 12c is turned off, and the parasitic element 12d is turned on.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned on, the parasitic element 12b is turned on, the parasitic element 12c is turned off, and the parasitic element 12d is turned on. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which XY when the parasitic element 12a is turned off, the parasitic element 12b is turned off, the parasitic element 12c is turned on, and the parasitic element 12d is turned on. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which XY when the parasitic element 12a is turned off, the parasitic element 12b is turned on, the parasitic element 12c is turned on, and the parasitic element 12d is turned on. It is a plane radiation pattern characteristic.
- FIG. 3 is a simulation result of the variable directivity antenna device 21 of FIG. 1 in which the parasitic element 12a is turned on, the parasitic element 12b is turned on, the parasitic element 12c is turned on, and the parasitic element 12d is turned on.
- FIG. 24B is a side view of the variable directivity antenna device 21D of FIG. 24A.
- FIG. 1A is a plan view showing the configuration of the variable directivity antenna device 21 according to the first embodiment of the present invention
- FIG. 1B is a side view of the variable directivity antenna device 21
- FIG. 2 is a perspective view of the variable directivity antenna device 21 of FIG.
- the variable directivity antenna device is on the circumference of a predetermined radius d having a center where the parasitic element 12a is provided on the dielectric substrate 10 having the ground conductor 13 formed on the back surface.
- the antenna element 11a, the parasitic element 12d, the antenna element 11c, the parasitic element 12c, the antenna element 11b, and the parasitic element 12b are provided clockwise at the positions of the respective apexes of the regular hexagon. It has been.
- Each of the elements 11a to 11c and 12a to 12d has a circular patch antenna having a predetermined circumferential length at the top, and is supported on a dielectric substrate 10 by a support member 14 incorporating a feed line and the like.
- Each of the elements 11a to 11c and 12a to 11d may be, for example, a quarter wavelength whip antenna.
- the element interval d is set to 14 mm corresponding to an electrical length of about 1 / 4 ⁇ of an operating frequency of 5.2 GHz so that adjacent antenna elements and parasitic elements are electromagnetically coupled. When communication is performed at a distance of about 31 mm, the distance may be about 31 mm.
- FIG. 3 is a block diagram showing a configuration of the wireless communication device 20 using the variable directivity antenna device 21 of FIG. 1
- FIG. 4 is a circuit diagram showing a configuration of the control circuit 30 of the parasitic elements 12a to 12d of FIG.
- the radio communication apparatus includes a variable directivity antenna apparatus 21 shown in FIGS. 1 and 2, three radio transmission / reception circuits 22a, 22b, and 22c, a MIMO modulation / demodulation circuit 23, and a baseband signal.
- a processing circuit 24, a MAC (Media Access Control) circuit 26, a variable directivity antenna device 21, and a controller 25 for controlling these circuits are provided.
- MAC Media Access Control
- each of the radio transmission / reception circuits 22a, 22b, and 22c includes a duplexer, a radio transmission circuit, and a radio reception circuit.
- the MIMO modulation / demodulation circuit 23 performs modulation / demodulation processing on radio signals transmitted and received by the three antenna elements 11a to 11c and the radio transmission / reception circuits 22a to 22c using a known MIMO modulation / demodulation method.
- the baseband signal processing circuit 24 is connected to the MIMO modulation / demodulation circuit 23 and the MAC circuit 26.
- the data signal input from the MAC circuit 26 is subjected to predetermined baseband signal processing and output to the MIMO modulation / demodulation circuit 23.
- Predetermined baseband signal processing is performed on the demodulated signal from the circuit 23 and output to the MAC circuit 26.
- the MAC circuit 26 generates a predetermined data signal by performing signal processing for a predetermined MAC and outputs the predetermined data signal to the baseband signal processing circuit 24, while inputting the data signal from the baseband signal processing circuit 24 and performing the predetermined processing MAC processing is performed.
- the antenna elements 11a, 11b, and 11c are connected to the radio transmission / reception circuits 22a, 22b, and 22c, respectively, and the parasitic elements 12a, 12b, 12c, and 12d are connected to the control circuit 30 of FIG. And a control signal for each parasitic element 12 a, 12 b, 12 c, 12 d is supplied from the controller 25 to each control circuit 30.
- each parasitic element 12a, 12b, 12c, 12d is connected to a connection point 36 via an impedance matching capacitor 33, and the connection point 36 has a high frequency having a sufficiently high impedance with respect to the operating frequency.
- the PIN diode 34 is connected to the control signal input terminal 31 via the blocking inductor 32 and connected to the anode of the PIN diode 34.
- the cathode of the PIN diode 34 is connected via the inductor 35 for increasing the electrical length of the parasitic element. Grounded.
- each PIN diode 34 operates as a plurality of switch means for switching whether or not each parasitic element 12a, 12b, 12c, 12d is grounded.
- variable directivity antenna device 21 of FIG. 1 are simulation results of the variable directivity antenna device 21 of FIG. 1, and are radiation pattern characteristics on the XY plane when the parasitic elements 12a to 12d are turned on or off.
- the directivity radiated from the antenna device 21 is directed in different directions, so that interference between the antenna elements is reduced and the correlation value is low. .
- the wireless communication device 20 including the variable directivity antenna device 21 configured as described above can solve the following two problems.
- one of the two antenna elements (two of 11a, 11b, and 11c) has a direct wave. And the other antenna element receives the reflected wave having a long delay time, thereby enabling more effective MIMO wireless communication.
- the present embodiment can adjust and align the signal strength of each other to some extent by switching the directivity pattern of the antenna device. Demonstrate.
- the effect of the AGC is not limited to the MIMO communication method, but the effect is the same in a wireless communication apparatus that simultaneously receives a plurality of wireless signals, such as MRC (Maximum Ratio Combination) described above. It is.
- each antenna element 11a to 11c for each antenna element since there is one feeding path to each antenna element 11a to 11c for each antenna element, a plurality of antenna elements are prepared and compared with the selective diversity system in which the antenna elements are switched. Thus, even when connecting to a wireless device using a coaxial cable and a high-frequency connector, there is a specific effect that production can be performed at low cost with a small amount.
- FIG. 21 is a plan view showing a configuration of a variable directivity antenna apparatus 21A according to the second embodiment of the present invention.
- the variable directivity antenna device according to the present embodiment includes four directional antenna devices at each vertex of a square having a center where the parasitic element 70 is provided on the dielectric substrate 10 having a ground conductor formed on the back surface.
- Parasitic elements 71, 72, 73, 74 are provided, and antenna elements 61, 62, 63, 64 are respectively provided at the midpoints (intermediate points of the square sides) between a pair of parasitic elements adjacent to each other.
- the distance between each antenna element and the parasitic element adjacent thereto is set to a quarter-wave distance d so that the adjacent antenna element and the parasitic element are electromagnetically coupled.
- Each parasitic element 70 to 74 includes the control circuit 30 of FIG.
- variable directional antenna device 21A can be configured by using the four antenna elements 61 to 64 and the five parasitic elements 70 to 74. Except for the number of circuits connected to the elements 61 to 64 and the number of control signals input to the parasitic elements 70 to 74, the configuration is the same as that of the wireless communication apparatus of FIG. 3 according to the first embodiment. Has a working effect.
- FIG. 22 is a plan view showing a configuration of a variable directivity antenna device 21B according to the third embodiment of the present invention.
- the variable directivity antenna device 21B according to the present embodiment is characterized in that the antenna elements 63 and 64 are removed as compared with the variable directivity antenna device 21A of FIG.
- variable directional antenna device 21B can be configured using the two antenna elements 61 and 62 and the five parasitic elements 70 to 74, and the antenna Except for the number of circuits connected to the elements 61 and 62 and the number of control signals input to the parasitic elements 70 to 74, the configuration is the same as that of the wireless communication apparatus of FIG. 3 according to the first embodiment. Has a working effect.
- FIG. 23A is a plan view showing a configuration of a variable directivity antenna apparatus 21C according to the fourth embodiment of the present invention
- FIG. 24A is a side view of the variable directivity antenna apparatus 21C of FIG. 23A.
- the variable directivity antenna device 21C according to the present embodiment includes two antenna elements 11b and 11d provided on the Y axis and one parasitic element 12a.
- the distance between the antenna elements 11b and 11d and the parasitic element 12a is set to a distance d of 1 ⁇ 4 wavelength.
- the parasitic element 12a includes the control circuit 30 shown in FIG.
- variable directional antenna device 21C can be configured by using the two antenna elements 11b and 11d and the parasitic element 12a, and the antenna element 11b. 3d except for the number of circuits connected to 11d and the number of control signals input to the parasitic element 12a, and having the same function and effect as the wireless communication apparatus of FIG. 3 according to the first embodiment. .
- FIG. 24A is a plan view showing a configuration of a variable directivity antenna apparatus 21D according to the fifth embodiment of the present invention
- FIG. 24B is a side view of the variable directivity antenna apparatus 21D of FIG. 24A.
- the variable directivity antenna device 21D according to the present embodiment is characterized in that the antenna element 11b and the parasitic elements 12b and 12c are removed as compared with the variable directivity antenna device 21 of FIG. 1A.
- variable directional antenna device 21D can be configured by using the two antenna elements 11a and 11c and the two parasitic elements 12a and 12d, and the antenna Except for the number of circuits connected to the elements 11a and 11c and the number of control signals input to the parasitic elements 12a and 12d, the configuration is the same as that of the wireless communication apparatus of FIG. 3 according to the first embodiment. Has a working effect.
- each antenna element and each parasitic element is set so that the antenna element and the parasitic element are electromagnetically coupled to each other, and each of the switch means is selectively turned on or off.
- each of the switch means is selectively turned on or off.
- the radiation pattern from the variable directivity antenna device can be selectively changed to direct the main beam in a desired direction.
- a variable directional antenna device that can greatly reduce the distance between the antenna elements, thereby reducing the size of the antenna device and improving the transmission quality of the MIMO radio system.
- the present invention particularly relates to home appliances such as a wireless communication device using an antenna device using a MIMO wireless communication system. And it can be used for all other industrial equipment.
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Abstract
Description
第1の無給電素子と、
上記第1の無給電素子と電磁的に結合するように近接して設けられた複数のアンテナ素子と、
上記第1の無給電素子に接続され、当該第1の無給電素子を接地するか否かを切り換える第1のスイッチ手段と、
上記第1のスイッチ手段をオン又はオフすることにより上記第1の無給電素子を無給電素子として動作させるか否かを切り換える制御信号を出力することにより、可変指向性アンテナ装置からの放射パターンを変化させる制御手段とを備えたことを特徴とする。
上記第2の無給電素子に接続され、当該各第2の無給電素子をそれぞれ接地するか否かを切り換える少なくとも1つの第2のスイッチ手段とをさらに備え、
上記制御手段は、上記各スイッチ手段を選択的にオン又はオフすることにより上記各無給電素子を無給電素子として動作させるか否かを選択的に切り換える別の制御信号を出力することを特徴とする。
上記各第2の無給電素子はそれぞれ、上記各アンテナ素子から1/4波長の電気長だけ離れて設けられたことを特徴とする。
図1(a)は本発明の第1の実施形態に係る可変指向性アンテナ装置21の構成を示す平面図であり、図1(b)は当該可変指向性アンテナ装置21の側面図である。また、図2は図1の可変指向性アンテナ装置21の斜視図である。
図21は、本発明の第2の実施形態に係る可変指向性アンテナ装置21Aの構成を示す平面図である。本実施形態に係る可変指向性アンテナ装置は、裏面に接地導体が形成されてなる誘電体基板10上において、無給電素子70が設けられた中心を有する正方形の各頂点の位置においてそれぞれ、4個の無給電素子71,72,73,74を設けるとともに、互いに隣接する1対の無給電素子の間の中点(正方形の辺の中間点)にそれぞれアンテナ素子61,62,63,64を設ける。ここで、各アンテナ素子と、それに隣接する無給電素子との間の距離は、隣接するアンテナ素子と無給電素子とが電磁的に結合するように、1/4波長の距離dに設定されている。なお、各無給電素子70~74は、図4の制御回路30を備える。
図22は、本発明の第3の実施形態に係る可変指向性アンテナ装置21Bの構成を示す平面図である。本実施形態に係る可変指向性アンテナ装置21Bは、図21の可変指向性アンテナ装置21Aに比較して、アンテナ素子63,64を除去したことを特徴としている。
図23Aは本発明の第4の実施形態に係る可変指向性アンテナ装置21Cの構成を示す平面図であり、図24Aは図23Aの可変指向性アンテナ装置21Cの側面図である。本実施形態に係る可変指向性アンテナ装置21Cは、Y軸上に設けられた2個のアンテナ素子11b及び11dならびに1個の無給電素子12aを備える。ここで、アンテナ素子11b及び11dと無給電素子12aとの間の距離はそれぞれ1/4波長の距離dに設定されている。また、無給電素子12aは、図4の制御回路30を備える。
図24Aは本発明の第5の実施形態に係る可変指向性アンテナ装置21Dの構成を示す平面図であり、図24Bは、図24Aの可変指向性アンテナ装置21Dの側面図である。本実施形態に係る可変指向性アンテナ装置21Dは、図1Aの可変指向性アンテナ装置21に比較して、アンテナ素子11bならびに無給電素子12b及び12cを除去したことを特徴としている。
11a,11b,11c,11d…アンテナ素子、
12a,12b,12c,12d…無給電素子、
13…接地導体、
14…支持部材、
20…無線通信装置、
21,21A,21B,21C,21D…可変指向性アンテナ装置、
22a,22b,22c…無線送受信回路、
23…MIMO変復調回路、
24…ベースバンド信号処理回路、
25…コントローラ、
26…MAC回路、
30…制御回路、
31…制御信号入力端子、
32…高周波阻止用インダクタ、
33…インピーダンス整合用キャパシタ、
34…PINダイオード、
35…インダクタ、
36…接続点、
61,62,63,64…アンテナ素子、
70,71,72,73,74…無給電素子。
Claims (10)
- 第1の無給電素子と、
上記第1の無給電素子と電磁的に結合するように近接して設けられた複数のアンテナ素子と、
上記第1の無給電素子に接続され、当該第1の無給電素子を接地するか否かを切り換える第1のスイッチ手段と、
上記第1のスイッチ手段をオン又はオフすることにより上記第1の無給電素子を無給電素子として動作させるか否かを切り換える制御信号を出力することにより、可変指向性アンテナ装置からの放射パターンを変化させる制御手段とを備えたことを特徴とする可変指向性アンテナ装置。 - 2個のアンテナ素子を備えたことを特徴とする請求項1記載の可変指向性アンテナ装置。
- 上記各アンテナ素子と電磁的に結合するように近接して設けられた少なくとも1つの第2の無給電素子と、
上記第2の無給電素子に接続され、当該各第2の無給電素子をそれぞれ接地するか否かを切り換える少なくとも1つの第2のスイッチ手段とをさらに備え、
上記制御手段は、上記各スイッチ手段を選択的にオン又はオフすることにより上記各無給電素子を無給電素子として動作させるか否かを選択的に切り換える別の制御信号を出力することを特徴とする請求項1記載の可変指向性アンテナ装置。 - 2個のアンテナ素子と、1個の第2の無給電素子とを備えたことを特徴とする請求項3記載の可変指向性アンテナ装置。
- 2個のアンテナ素子と、4個の第2の無給電素子とを備えたことを特徴とする請求項3記載の可変指向性アンテナ装置。
- 3個のアンテナ素子と、3個の第2の無給電素子とを備えたことを特徴とする請求項3記載の可変指向性アンテナ装置。
- 4個のアンテナ素子と、4個の第2の無給電素子とを備えたことを特徴とする請求項3記載の可変指向性アンテナ装置。
- 上記各アンテナ素子は、上記第1の無給電素子から1/4波長の電気長だけ離れて設けられたことを特徴とする請求項1又は2記載の可変指向性アンテナ素子。
- 上記各アンテナ素子は、上記第1の無給電素子から1/4波長の電気長だけ離れて設けられ、
上記各第2の無給電素子はそれぞれ、上記各アンテナ素子から1/4波長の電気長だけ離れて設けられたことを特徴とする請求項3から7までのうちのいずれか1つの請求項記載の可変指向性アンテナ装置。 - 上記各スイッチ手段は、上記各無給電素子と設置導体との間に接続されたPINダイオードであることを特徴とする請求項1から9までのうちのいずれか1つの請求項記載の可変指向性アンテナ装置。
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US13/002,570 US8525748B2 (en) | 2008-07-08 | 2009-07-08 | Variable directivity antenna apparatus provided with antenna elements and at least one parasitic element connected to ground via controlled switch |
JP2010519642A JP5514106B2 (ja) | 2008-07-08 | 2009-07-08 | 可変指向性アンテナ装置 |
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JP2008177669 | 2008-07-08 | ||
JP2008-177669 | 2008-07-08 |
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WO2010004739A1 true WO2010004739A1 (ja) | 2010-01-14 |
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PCT/JP2009/003174 WO2010004739A1 (ja) | 2008-07-08 | 2009-07-08 | 可変指向性アンテナ装置 |
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US (1) | US8525748B2 (ja) |
JP (1) | JP5514106B2 (ja) |
WO (1) | WO2010004739A1 (ja) |
Cited By (4)
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WO2017150054A1 (ja) * | 2016-03-04 | 2017-09-08 | 株式会社村田製作所 | アレーアンテナ |
JP2018007032A (ja) * | 2016-07-01 | 2018-01-11 | 株式会社東芝 | アンテナ装置 |
US10693227B2 (en) | 2015-10-14 | 2020-06-23 | Nec Corporation | Patch array antenna, directivity control method therefor and wireless device using patch array antenna |
WO2022123629A1 (ja) * | 2020-12-07 | 2022-06-16 | 日本電信電話株式会社 | 受信装置、及び受信方法 |
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US8830132B1 (en) * | 2010-03-23 | 2014-09-09 | Rockwell Collins, Inc. | Parasitic antenna array design for microwave frequencies |
GB2500884A (en) * | 2012-04-02 | 2013-10-09 | Renesas Mobile Corp | Method and means of controlling the ground plane of an antenna to provide a steerable radiation beam |
KR101880971B1 (ko) * | 2012-12-07 | 2018-07-23 | 삼성전자주식회사 | 빔형성 방법 및 장치 |
EP3089262B1 (en) * | 2014-02-17 | 2020-03-18 | Huawei Device Co., Ltd. | Antenna switching system and method |
CN104518812B (zh) * | 2014-12-01 | 2017-11-10 | 惠州Tcl移动通信有限公司 | 一种移动终端切换天线及其切换方法 |
JP6059837B1 (ja) * | 2016-03-22 | 2017-01-11 | 日本電信電話株式会社 | アンテナ制御装置、アンテナ制御プログラムおよびアンテナ制御システム |
CN108199131A (zh) * | 2017-12-27 | 2018-06-22 | 宇龙计算机通信科技(深圳)有限公司 | 一种天线系统及一种通信终端 |
JP6923853B2 (ja) * | 2018-04-26 | 2021-08-25 | 株式会社村田製作所 | アンテナモジュール |
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US10693227B2 (en) | 2015-10-14 | 2020-06-23 | Nec Corporation | Patch array antenna, directivity control method therefor and wireless device using patch array antenna |
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Also Published As
Publication number | Publication date |
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JP5514106B2 (ja) | 2014-06-04 |
US20110102287A1 (en) | 2011-05-05 |
JPWO2010004739A1 (ja) | 2011-12-22 |
US8525748B2 (en) | 2013-09-03 |
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