WO2015107983A1 - Dispositif d'antenne - Google Patents

Dispositif d'antenne Download PDF

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Publication number
WO2015107983A1
WO2015107983A1 PCT/JP2015/050458 JP2015050458W WO2015107983A1 WO 2015107983 A1 WO2015107983 A1 WO 2015107983A1 JP 2015050458 W JP2015050458 W JP 2015050458W WO 2015107983 A1 WO2015107983 A1 WO 2015107983A1
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WO
WIPO (PCT)
Prior art keywords
antenna
antenna element
conductor piece
frequency
conductor
Prior art date
Application number
PCT/JP2015/050458
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English (en)
Japanese (ja)
Inventor
柴山　貴光
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2015107983A1 publication Critical patent/WO2015107983A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/38—Vertical arrangement of element with counterpoise
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface

Definitions

  • the present invention relates to a communication antenna device, and more particularly to an antenna device having a plurality of antennas.
  • LTE Long Term Evolution
  • it is determined to transmit and receive data using a plurality of different frequency bands.
  • an antenna device having a plurality of antenna elements on the same insulating substrate is used to support a plurality of frequency bands.
  • MIMO Multiple Input Multiple Multiple Output
  • an antenna device having a plurality of antenna elements corresponding to adjacent frequency bands and having improved isolation characteristics between the plurality of antenna elements, such as the antenna device 900 according to Patent Document 1, is provided. Proposed.
  • the antenna device according to Patent Document 1 will be described with reference to FIG.
  • the antenna device 900 includes a ground plane 910, a first antenna element 911 corresponding to the first frequency band, and a second frequency band corresponding to the second frequency band that is adjacent to the first frequency band or overlaps the first frequency band.
  • the first antenna element 911 is arranged in a direction orthogonal to the long side of the ground plane 910
  • the second antenna element 912 is arranged in a direction parallel to the long side of the ground plane 910.
  • the antenna device 900 by arranging the first antenna element 911 and the second antenna element 912 so as to be orthogonal to each other, the coupling between the antenna elements can be reduced, and the isolation characteristic between the antenna elements is reduced. It can be improved.
  • the present invention has been made in view of the situation of the prior art as described above, and its purpose is to have two antennas provided with a plurality of antenna elements, even if the apparatus main body is downsized.
  • An object of the present invention is to provide an antenna device capable of maintaining the isolation characteristics between antennas.
  • an antenna device includes a ground plate, a first antenna provided on one surface side of the ground plate, and a second antenna provided on one surface side of the ground plate.
  • An antenna device wherein a first plane formed by the first antenna and a second plane formed by the second antenna face each other in parallel, and are connected to the ground plate.
  • the first antenna has a first antenna element, and the first antenna element is not parallel to or perpendicular to the normal of the ground plate.
  • the second antenna has a second antenna element, the second antenna element comprising an assembly of a plurality of second conductor pieces that are neither parallel nor perpendicular to the normal; in front When the first antenna and the second antenna are overlapped, the first conductor piece and the second conductor piece corresponding to each other are directed in opposite directions with respect to the perpendicular. .
  • the antenna device configured as described above, when the first antenna and the second antenna are overlapped, the first conductor piece and the second conductor piece corresponding to each other are opposite to each other with respect to the normal of the ground plate. Therefore, the antenna polarization planes of the first conductor piece and the second conductor piece corresponding to each other can cross each other. As a result, the coupling between the first conductor piece and the second conductor piece corresponding to each other can be reduced, and even when the antenna device body is downsized, it is required between the first antenna and the second antenna. The isolation characteristics between antennas can be maintained.
  • an angle formed by the first conductor piece and the second conductor piece corresponding to each other is a right angle.
  • the angle formed between the first conductor piece and the second conductor piece corresponding to each other is set to be a right angle.
  • the antenna polarization planes of the first conductor piece and the second conductor piece can be made orthogonal to each other. As a result, the coupling between the first conductor piece and the second conductor piece corresponding to each other can be further reduced, and the inter-antenna isolation between the first antenna and the second antenna can be further increased.
  • the shape is the same as the shape of the first antenna element, and when the first antenna and the second antenna are viewed in an overlapping manner,
  • the corresponding first conductor piece and second conductor piece have a feature that each has an angle of 45 ° with respect to the perpendicular.
  • the characteristics of the first antenna and the second antenna can be made the same, and the isolation between the antennas between the first antenna and the second antenna is maximized. be able to.
  • the first conductor piece and the second conductor piece corresponding to each other are oriented in opposite directions with respect to the normal of the ground plate.
  • the antenna polarization planes of the first conductor piece and the second conductor piece corresponding to each other can be made to intersect each other.
  • the coupling between the first conductor piece and the second conductor piece corresponding to each other can be reduced, and even when the antenna device body is downsized, it is required between the first antenna and the second antenna.
  • the isolation characteristics between antennas can be maintained.
  • the external shape of the antenna device 100 according to the embodiment and the configurations of the first antenna element 11 and the second antenna element 12 in the first antenna 1 and the second antenna 2 will be described with reference to FIGS. 1 to 5. .
  • FIG. 1 is a perspective view showing the final appearance of the antenna device 100 according to the embodiment
  • FIG. 2 is a perspective view showing the relationship between the first antenna 1 and the second antenna 2.
  • FIG. 3 is a diagram illustrating the relationship between the first frequency band, the second frequency band, and the third frequency band in the LTE system.
  • FIG. 4 is a front view showing the shape of the first antenna element 11 in the first antenna 1
  • FIG. 5 is a front view showing the shape of the second antenna element 12 in the second antenna 2.
  • the antenna device 100 is an antenna device that supports the LTE system and also supports the MIMO system, and includes two antennas for the MIMO system that have a plurality of antenna elements used in the multiband frequency band of the LTE system. Each antenna can transmit and receive at the same frequency.
  • the antenna device 100 is a miniaturized antenna device, and can maintain sufficient isolation between antennas even if the antenna device is miniaturized. The distance between the antennas is required to be closer, but the isolation between the antennas is required to be about 10 dB or more.
  • the antenna device 100 is assumed to be mounted on a vehicle, and is used by being mounted on the roof of the vehicle.
  • the antenna device 100 is housed in a case 31 having the shape of a cocoon ridge (shark fin shape) made of synthetic resin.
  • the shark fin shape is a streamlined outer shape that becomes thinner toward the tip and has a curved side surface that is narrowed inward.
  • the antenna device 100 includes a first antenna 1, a second antenna 2, and a ground plate 5.
  • the first antenna 1 and the second antenna 2 are protected from the external environment by being covered with the case 31.
  • the first antenna 1 and the second antenna 2 are connected to a communication device (not shown) in the vehicle by a cable 32, respectively.
  • the ground plate 5 is mounted on a pedestal (not shown), and the pedestal is attached to the roof of the vehicle together with the ground plate 5 by screws or magnets.
  • the ground plate 5 is a ground plane formed of metal, and may be formed of a metal foil pattern on the insulating substrate or of a metal plate.
  • the ground plane can be extended from the ground plate 5 to the vehicle roof by connecting the ground plate 5 directly to the vehicle roof or by coupling it to the vehicle roof by capacitive coupling or the like. Therefore, the entire roof of the vehicle can be used as the ground of the antenna device 100, and the performance of the antenna device 100 can be improved.
  • the antenna device 100 includes the above-described ground plate 5, the first antenna 1 provided on one surface side of the ground plate 5, and one surface side of the ground plate 5.
  • the 2nd antenna 2 provided in is comprised as shown in FIG.
  • the first antenna 1 includes a first insulating substrate 21 and a first antenna element 11 formed on the first insulating substrate 21.
  • the second antenna 2 includes a second insulating substrate 22 and a second antenna element 12 formed on the second insulating substrate 22.
  • the first insulating substrate 21 and the second insulating substrate 22 are mounted perpendicular to the ground plate 5 and face each other in parallel. That is, the first plane P1 formed by the first antenna 1 and the second plane P2 formed by the second antenna 2 face each other in parallel and stand upright with respect to the ground plate 5 respectively. ing. Further, the first insulating substrate 21 provided with the first antenna element 11 and the second insulating substrate 22 provided with the second antenna element 12, in other words, the first antenna 1 and the second antenna 2 are respectively connected between the antennas. They are mounted side by side at a distance L1.
  • the antenna device 100 is configured to support the LTE system.
  • the frequency band used for the LTE system is divided into three bands as shown in FIG.
  • the lowest frequency band is the first frequency band of 0.7 GHz to 0.96 GHz
  • the next frequency band is the second frequency band of 1.7 GHz to 2.2 GHz
  • the highest frequency band Is the third frequency band of 2.5 GHz to 2.7 GHz. Therefore, the first antenna 1 and the second antenna 2 both have a first frequency band of 0.7 GHz to 0.96 GHz, a second frequency band of 1.7 GHz to 2.2 GHz, and a frequency band of 2.5 GHz to 2.7 GHz.
  • the third frequency band signal can be transmitted and received.
  • the first antenna 1 includes a first antenna element 11, a first feeding point 1a, and a first grounding point 1b formed on a first insulating substrate 21.
  • the first antenna element 11 is a low-frequency first antenna element 11a, a parasitic first antenna element 11b, and a high-frequency first antenna element so that signals from the first frequency band to the third frequency band can be transmitted and received. 11c.
  • the first antenna element 11a for low frequency includes an aggregate of a plurality of first conductor pieces 11d and is formed so as to handle a signal in the first frequency band that is the lowest frequency band in the LTE system.
  • One end of one first conductor piece 11d of the plurality of first conductor pieces 11d is connected to the first feeding point 1a, and the other end of the first conductor piece 11d is another plurality of first conductor pieces. 11d is connected continuously.
  • the parasitic first antenna element 11b also has one end of one first conductor piece 11d of the plurality of first conductor pieces 11d connected to the first ground point 1b, and the other end of the first conductor piece 11d. The other first conductor piece 11d is connected.
  • each of the first conductor pieces 11d is formed to be inclined with respect to the normal line R1 of the ground plate 5. ing. That is, each first conductor piece 11d is neither parallel nor perpendicular to the perpendicular line R1.
  • the first antenna element for low frequency 11a also has a conductor piece perpendicular to the perpendicular line R1 of the ground plate 5, but this conductor piece increases the inductance component of the parasitic first antenna element 11b. This is a conductor piece, not the first conductor piece 11d, and does not particularly contribute to the improvement of the isolation characteristics between the antennas.
  • each first conductor piece 11d of the parasitic first antenna element 11b is provided along each first conductor piece 11d of the low-frequency first antenna element 11a.
  • the parasitic first antenna element 11b is provided to widen the frequency band handled by the low-frequency first antenna element 11a, and is not connected to the first feeding point 1a. It is connected to the ground point 1b.
  • Each first conductor piece 11d of the parasitic first antenna element 11b is connected to each first conductor piece 11d of the low-frequency first antenna element 11a, which is a feeding element, to the wavelength of the resonance frequency of the parasitic first antenna element 11b.
  • the parasitic first antenna element 11b can be capacitively coupled to the low-frequency first antenna element 11a by keeping the distance at a very short distance. That is, the parasitic first antenna element 11b is fed from the first antenna element for low frequency 11a and becomes an antenna element having a new resonance frequency.
  • the antenna length of the parasitic first antenna element 11b is set somewhat shorter than the antenna length of the low-frequency first antenna element 11a. Therefore, the new resonance frequency by the parasitic first antenna element 11b becomes higher than the resonance frequency of the low-frequency first antenna element 11a, and as a result, the frequency band by the low-frequency first antenna element 11a is expanded to the higher side. It becomes possible. That is, the frequency band by the low frequency first antenna element 11a can be widened.
  • the high-frequency first antenna element 11c is configured such that one end of the conductor is connected to the first feeding point 1a and the width gradually increases from one end toward the open end.
  • the first feeding point 1a has a substantially triangular shape with one vertex.
  • the capacitance component is further increased.
  • the resonance frequency decreases as the capacitance component increases. Therefore, when compared to a conductor whose open end is not wide, the antenna resonance frequency is small if the length of the antenna radiation conductor is the same. Become. That is, by widening the open end of the antenna, the length of the radiation conductor required for resonating at a desired frequency can be set shorter, so that the overall size of the antenna device can be reduced.
  • the antenna length of the low-frequency first antenna element 11a is set to a length corresponding to the first frequency band, and specifically, is about 1 ⁇ 4 of the wavelength of the predetermined frequency signal in the first frequency band. Is set.
  • the antenna length of the first antenna element for high frequency 11c is set to a length corresponding to a second frequency band having a frequency higher than that of the first frequency band. Specifically, a predetermined frequency signal in the second frequency band is set. Is set to about 1 ⁇ 4 of the wavelength.
  • the first conductor piece 11d on the feeding point side of the low frequency first antenna element 11a is provided along the conductor of the high frequency first antenna element 11c.
  • the impedance of the antenna element includes an inductance component determined by the length and width of the conductor of the antenna element, and a capacitance component generated between the conductor of the antenna element and the ground, or between the conductors of two adjacent antenna elements. Determined by.
  • a capacitance component generated between the conductors of two adjacent antenna elements by adjusting the distance between the conductors of two adjacent antenna elements and adjusting the distance between the conductors of the two adjacent antenna elements. Can be adjusted. As a result, the impedance of each antenna element can be adjusted.
  • the first conductor piece 11d of the first antenna element for low frequency 11a is provided along the conductor of the first antenna element for high frequency 11c, and the distance between the conductors and the length of each conductor are provided.
  • each impedance matching is performed. This adjustment is performed at the design stage of the first antenna 1, and therefore the performance of the first antenna 1 is almost determined at the design stage.
  • the antenna length of the low-frequency first antenna element 11a is configured to be able to transmit and receive a frequency band of 2.5 GHz to 2.7 GHz corresponding to a frequency band about three times the first frequency band, that is, the third frequency band. .
  • the antenna length of the first antenna element 11a for low frequency is set to about 3 ⁇ 4 of the wavelength of the predetermined frequency signal in the third frequency band.
  • the predetermined frequency in the third frequency band corresponds to a frequency about three times the predetermined frequency in the first frequency band.
  • the antenna length of the first antenna element for low frequency 11a is set so that the first frequency band can be transmitted and received, and at the same time, the third frequency band corresponding to about three times the first frequency band is set. Is set to be able to send and receive. Therefore, transmission / reception in two frequency bands having significantly different frequencies can be realized with only one element. Therefore, it is possible to contribute to downsizing of the multiband antenna device 100.
  • each of the conductor pieces of the first antenna element 11a for low frequency, each of the first conductor pieces 11d of the parasitic first antenna element 11b, and the first antenna element 11c for high frequency are made of a metal conductor.
  • the metal conductor may be formed by a metal foil pattern on the first insulating substrate 21 shown in FIG. 4, or may be configured by cutting and combining metal plates without using an insulating substrate. May be.
  • the second antenna 2 includes a second antenna element 12, a second feed point 2a, and a second ground point 2b formed on the second insulating substrate 22.
  • the second antenna element 12 has a low-frequency second antenna element 12a, a parasitic second antenna element 12b, and a high-frequency second antenna element so that signals from the first frequency band to the third frequency band can be transmitted and received. 12c.
  • the second antenna element 12a for low frequency includes an aggregate of a plurality of second conductor pieces 12d, and is formed so as to handle a signal in the first frequency band that is the lowest frequency band in the LTE system.
  • One end of one second conductor piece 12d among the plurality of second conductor pieces 12d is connected to the first feeding point 1a, and the other end of the second conductor piece 12d is connected to the other plurality of second conductor pieces. 12d is connected continuously.
  • one end of one second conductor piece 12d of the plurality of second conductor pieces 12d is connected to the second ground point 2b, and the other end of the second conductor piece 12d is connected to the other end of the second conductor piece 12d.
  • the other second conductor piece 12d is connected.
  • the high-frequency second antenna element 12c is configured such that one end of the conductor is connected to the second feeding point 2a and the width gradually increases from one end toward the open end.
  • the second feeding point 2a has a substantially triangular shape with one vertex.
  • the second antenna element 12 including the low-frequency second antenna element 12a, the parasitic second antenna element 12b, and the high-frequency second antenna element 12c has a shape when the second antenna element 12 is turned upside down. It is configured to be congruent with the shape of the first antenna element 11. In other words, when the second antenna element 12 is turned over in the left-right direction and overlapped with the first antenna element 11, each antenna element appears to be completely overlapped. As a result, only one antenna element exists.
  • the second antenna element 12 is configured to look like this.
  • the shape when the second antenna element 12 is turned upside down is configured to be the same as the shape of the first antenna element 11. Therefore, in the second antenna element 12, the low frequency second antenna element 12a corresponds to the low frequency first antenna element 11a, the parasitic second antenna element 12b corresponds to the parasitic first antenna element 11b, and the high frequency
  • the second antenna element 12c for use corresponds to the first antenna element 11c for high frequency.
  • the second feeding point 2 a of the second antenna 2 corresponds to the first feeding point 1 a of the first antenna 1
  • the second grounding point 2 b of the second antenna 2 corresponds to the first grounding point 1 b of the first antenna 1.
  • the function of each antenna element of the second antenna element 12 is exactly the same as the function of each antenna element of the first antenna element 11. Therefore, the further description about the 2nd antenna 2 is abbreviate
  • FIG. 6 is a front view when the first antenna 1 and the second antenna 2 are viewed in an overlapping manner
  • FIG. 7 is a graph showing the isolation characteristics between the antennas of the antenna device 100 of the present invention.
  • the first conductor piece 11d and the second conductor piece 12d of each of the first antenna element 11 and the second antenna element 12 are not parallel to the perpendicular line R1 or perpendicular line R2 of the ground plate 5 but perpendicular to each other. Absent. Therefore, as shown in FIG. 6, when the first antenna 1 and the second antenna 2 are viewed in parallel with each other, the first conductor piece 11d and the second conductor piece 12d corresponding to each other are perpendicular to each other. Alternatively, the directions are opposite to each other with respect to the perpendicular line R2.
  • the first conductor piece 11d and the second conductor piece 12d of the first antenna element 11 and the second antenna element 12 respectively correspond to each other.
  • Some of the first conductor piece 11d and the second conductor piece 12d have a right angle.
  • the second conductor element 11d from the first feeding point 1a and the second antenna element 12a for low frequency are second from the second feeding point 2a.
  • the angle ⁇ formed by the third first conductor piece 11d from the first feeding point 1a and the third second conductor piece 12d from the second feeding point 2a is an angle ⁇ ⁇ 90 °. This is to extend the first conductor piece 11d and the second conductor piece 12d in the upward direction in order to ensure antenna characteristics other than the isolation between the antennas.
  • the shape when the second antenna element 12 is turned over is set to be the same as the shape of the first antenna element 11. Therefore, when the first antenna 1 and the second antenna 2 are viewed in an overlapped manner, the first conductor piece 11d and the second conductor piece 12d corresponding to each other are at an angle of 45 ° with respect to the perpendicular R1 or the perpendicular R2, respectively. It is set to make.
  • the antenna performance of each antenna can be ensured by setting the distance between the antennas of the two antennas mounted in parallel to 1/4 or more of the wavelength of the handled frequency. Therefore, the inter-antenna distance L1 between the first antenna 1 and the second antenna 2 shown in FIG. 2 is normally set to 1 ⁇ 4 of the wavelength of the signal near the lowest frequency of the handled frequency. In the LTE system, since 0.7 GHz is the lowest frequency, the inter-antenna distance L1 is set to 1 ⁇ 4 ( ⁇ / 4) of the wavelength of the signal in the vicinity of 0.7 GHz.
  • the dimension is about 100 mm. That is, if the inter-antenna distance L1 is set to about 100 mm, the antenna performance near that frequency can be ensured. For frequencies higher than 0.75 GHz, the antenna distance L1 is necessarily 1 ⁇ 4 or more of the wavelength of the signal, so that the antenna performance can be ensured.
  • the isolation between the antennas is 10 dB or more without applying the present invention. Sufficient characteristics have been obtained. However, when the present invention is not applied and the distance between the two antennas is set to 1/6 ( ⁇ / 6) of the wavelength of the signal of 0.75 GHz, that is, set to be shortened to about 67 mm, As shown by the alternate long and short dash line in FIG. 7, it is confirmed that the isolation characteristics between the antennas deteriorate. In the case of about 0.8 GHz or more, it is considered that there is no problem because it is 10 dB or more. However, in the band of 0.7 GHz to 0.8 GHz, 10 dB is cut, and sufficient isolation characteristics between antennas cannot be obtained. I understand.
  • the inter-antenna isolation between the first antenna 1 and the second antenna 2 is about 10 dB. This is substantially equivalent to the case where the inter-antenna distance L1 between the first antenna 1 and the second antenna 2 is set to 1 ⁇ 4 of the wavelength of the signal of 0.75 GHz without applying the present invention. Further, without applying the present invention, the antenna distance L1 between the first antenna 1 and the second antenna 2 is improved by about 2 dB as compared with the case where the wavelength of the signal of 0.75 GHz is set to 1/6. ing.
  • the antenna device 100 is an antenna obtained when the inter-antenna distance L1 between the first antenna 1 and the second antenna 2 is set to 1/4 (100 mm) of the wavelength of the signal of 0.75 GHz.
  • the inter-antenna isolation characteristic can be obtained even when the distance L1 between the antennas is shortened to 1/6 (67 mm) of the wavelength of the signal of 0.75 GHz.
  • the size of the antenna device 100 main body in the Y1-Y2 direction is reduced by 33 mm, that is, 33%, while maintaining the required inter-antenna isolation characteristics between the first antenna 1 and the second antenna 2. Can do.
  • the antenna device 100 when the first antenna 1 and the second antenna 2 are viewed with being overlapped, the first conductor piece 11d and the second conductor piece 12d corresponding to each other are connected to the perpendicular R1 or the perpendicular R2. So that they face in opposite directions. Therefore, the antenna polarization planes of the first conductor piece 11d and the second conductor piece 12d corresponding to each other can be crossed. As a result, the coupling between the first conductor piece 11d and the second conductor piece 12d corresponding to each other can be reduced, and even when the antenna device 100 main body is downsized, the first antenna 1 and the second antenna 2 can be reduced. The required inter-antenna isolation characteristics can be maintained.
  • the angle between the first conductor piece 11d and the second conductor piece 12d corresponding to each other is set to be a right angle, so that the first conductors corresponding to each other are set.
  • the antenna polarization planes of the piece 11d and the second conductor piece 12d can be orthogonal to each other. As a result, the coupling between the first conductor piece 11d and the second conductor piece 12d corresponding to each other can be further reduced, and the inter-antenna isolation between the first antenna 1 and the second antenna 2 can be further increased. it can.
  • the characteristics of the first antenna 1 and the second antenna 2 are made the same.
  • the inter-antenna isolation between the first antenna 1 and the second antenna 2 can be maximized.
  • the first conductor piece and the second conductor piece corresponding to each other are connected to the perpendicular of the ground plate. Since they are configured to face in opposite directions, the antenna polarization planes of the first conductor piece and the second conductor piece corresponding to each other can intersect each other. As a result, the coupling between the first conductor piece and the second conductor piece corresponding to each other can be reduced, and even when the antenna device body is downsized, it is required between the first antenna and the second antenna. The isolation characteristics between antennas can be maintained.
  • the antenna device 100 As described above, the antenna device 100 according to the embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. It is.

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  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention a pour but de fournir un dispositif d'antenne capable de conserver une caractéristique d'isolation même si un corps de dispositif est miniaturisé lorsque le dispositif possède deux antennes pourvues chacune d'une pluralité d'éléments d'antenne. Pour atteindre ce but, l'invention concerne un dispositif d'antenne (100) qui est pourvu d'une plaque de masse (5), d'une première antenne (1) et d'une seconde antenne (2), la première antenne (1) comportant un premier élément d'antenne (11), le premier élément d'antenne (11) comprenant un agrégat d'une pluralité de premières pièces conductrices (11d) qui ne sont ni parallèles ni perpendiculaires à une perpendiculaire (R1) à la plaque de masse, la seconde antenne (2) comportant un second élément d'antenne (12), le second élément d'antenne (12) comprenant un agrégat d'une pluralité de secondes pièces conductrices (12d) qui ne sont ni parallèles ni perpendiculaires à une perpendiculaire (R2), et, lorsque la première antenne (1) et la seconde antenne (2) sont vues superposées l'une sur l'autre, la première pièce conductrice (11d) et la seconde pièce conductrice (12d) qui se correspondent sont orientées dans des sens contraires relativement à la perpendiculaire (R1) ou la perpendiculaire (R2).
PCT/JP2015/050458 2014-01-14 2015-01-09 Dispositif d'antenne WO2015107983A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-004222 2014-01-14
JP2014004222A JP2017041661A (ja) 2014-01-14 2014-01-14 アンテナ装置

Publications (1)

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WO2015107983A1 true WO2015107983A1 (fr) 2015-07-23

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WO2020121748A1 (fr) * 2018-12-12 2020-06-18 原田工業株式会社 Dispositif d'antenne
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CN113302797A (zh) * 2019-01-03 2021-08-24 Lg 伊诺特有限公司 机动车阵列天线
WO2021193094A1 (fr) * 2020-03-25 2021-09-30 株式会社ヨコオ Dispositif d'antenne monté sur véhicule

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JP2017228860A (ja) * 2016-06-20 2017-12-28 株式会社フジクラ アンテナ装置
JP2017229047A (ja) * 2016-06-20 2017-12-28 株式会社フジクラ アンテナ
CN112740479A (zh) * 2018-09-28 2021-04-30 株式会社友华 车载天线装置
JPWO2020067253A1 (ja) * 2018-09-28 2021-08-30 株式会社ヨコオ 車載アンテナ装置
JP7494121B2 (ja) 2018-09-28 2024-06-03 株式会社ヨコオ 車載アンテナ装置
CN112740479B (zh) * 2018-09-28 2024-05-14 株式会社友华 车载天线装置
WO2020121748A1 (fr) * 2018-12-12 2020-06-18 原田工業株式会社 Dispositif d'antenne
JPWO2020121748A1 (ja) * 2018-12-12 2021-10-21 原田工業株式会社 アンテナ装置
JP7130773B2 (ja) 2018-12-12 2022-09-05 原田工業株式会社 アンテナ装置
US11901640B2 (en) 2018-12-12 2024-02-13 Harada Industry Co., Ltd. Antenna device
US11978951B2 (en) 2019-01-03 2024-05-07 Lg Innotek Co., Ltd. Automotive array antenna
CN113302797A (zh) * 2019-01-03 2021-08-24 Lg 伊诺特有限公司 机动车阵列天线
WO2021193094A1 (fr) * 2020-03-25 2021-09-30 株式会社ヨコオ Dispositif d'antenne monté sur véhicule
EP4129768A4 (fr) * 2020-03-25 2024-04-10 Yokowo Co., Ltd. Dispositif d'antenne monté sur véhicule
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