JP6118950B2 - Non-directional antenna for MIMO using the bias effect - Google Patents

Description

  The present invention relates to an omnidirectional antenna for MIMO using a bias effect, and more specifically, wireless communication capable of multiple transmission / reception by embodying a omnidirectional antenna for MIMO using the bias effect. Related to antennas.

  In general, in a communication circuit, a plurality of high-frequency signals are combined into one or connected together to connect with other circuits to construct a communication means such as a multiband.

When such a plurality of signals are connected and used in one line, there arises a problem that they are canceled by the characteristics of each signal, or a loss due to branching occurs.
As a result, there is a disadvantage that the structure becomes complicated and the size of the circuit becomes large, such as providing a unique antenna for each signal or installing a filter for filtering noise.

  Therefore, the present applicant applies the bias effect in Patent Document 1 (bias effect and its application, hereinafter referred to as “prior art”) to determine the direction in which the current of the high-frequency signal flows in the metal plate in a certain direction. We propose a method for controlling the flow to flow only in a desired direction and an antenna using this method. When a high frequency signal is separated into a “+” signal and a “−” signal according to polarity, and the two signals are drawn into the metal plate, they are connected while maintaining a certain distance. Thereby, the effect of obtaining the result of causing the direction of the drawn current to flow only in the drawing direction along the drawing axis is used. Here, using a combiner that combines multiple input signals into a single signal, each input signal is not transmitted to different input ports, but only sent to the output ports, resulting in an isolation effect between the input ports. We have developed a technology that can be used as a coupling circuit with excellent coupling loss.

  Although the above-mentioned prior art has presented an applied antenna technology that is simple in structure and excellent in effectiveness, it maintains the directivity that increases the transmission efficiency without canceling the signal while maintaining a larger amount of transmission. Therefore, development of a non-directional antenna for MIMO (MIMO: Multi-Input Multi-Output) capable of more effective transmission / reception is required. There is also a need for a technology that can be implemented with a simple structure.

Korean Registered Patent No. 10-1017690

  In order to provide an omnidirectional MIMO antenna using the bias effect due to the above technical needs, an object is to provide an omnidirectional MIMO antenna having a simple structure and high performance.

  In order to achieve the above-mentioned object, the input port, the T distributor for distributing the signal, and the 180 ° signal phase converter are formed by the metal strip line on the dielectric substrate, and the metal plate is the radiator of the patch antenna. In order to implement an omnidirectional antenna based on an antenna using the bias effect, the x-axis microstrip line 110 is formed on one side so that a signal can be polarized in the x-axis direction. The y-axis microstrip line 120 is formed on the other side surface so that the signal can be polarized in the y-axis direction, and corresponds to the nodes 110a and 110b of the x-axis microstrip line 110 and penetrates the circuit board. Through-holes 130a and 130b provided on the substrate surface on which the y-axis microstrip line 120 is formed, and the y-axis Corresponding to the portions of the nodes 120a and 120b of the cross-trip line 120, the first through holes 140a and 140b are formed so as to penetrate the circuit board and provided on the substrate surface on which the x-axis microstrip line 110 is formed. The substrate 100 and the x-axis microstrip line and the y-axis microstrip line, which are formed in the same structure as the first substrate 100 and embodied on the substrate surface, are rotated by 45 ° ± 5 ° around the y-axis. The x-axis microstrip line 210 and the y-axis microstrip line 220 are coupled to one side surface of the second substrate 200 implemented on the substrate and the first substrate 100 and the second substrate 200 to form a circuit network, A metal plate-shaped radiation antenna 300 for radiating the light, and a connection circuit base for connecting the first substrate 100 and the second substrate 200 A non-directional antenna for MIMO using a bias effect, characterized in that the first substrate 100 and the second substrate 200 and the wired circuit board 400 are combined to form a cubic structure. To do.

  In order to implement a MIMO antenna using the above-described bias effect, the first substrate 100 having the x-axis microstrip line 110 disposed on the front surface thereof, and the y-axis microstrip with the first substrate 100 reversed. A reverse first substrate 100 ′ in which the line 120 is disposed in the front portion, a second substrate 200 in which the x-axis microstrip line 210 is disposed in the front portion, and a y-axis microstrip line 220 with the second substrate 200 reversed. The reverse second substrate 200 ′ disposed on the front surface portion is disposed on the side surface portion, and is disposed as a housing structure so that the side surfaces of the respective substrates are coupled to each other. After coupling 400, the radiation antenna 300 is coupled to the front surface of each substrate. A first terminal 410 and a second terminal 420 for applying signals are formed on the bottom surface of the wired circuit board 400, and the first terminal 410 is connected to a strip line formed on one side through the circuit board. The second terminal 420 is connected to a strip line formed on the other side surface.

  With such a structure, when different signals are applied to the first terminal 410 and the second terminal 420 and the signals are biased to radiate a plurality of frequencies, the respective signals are prevented from being mixed. A plurality of frequencies can be transmitted and received.

  In addition, a plurality of strip lines are provided on each of the first substrate 100 and the second substrate 200 of the cubic-shaped omnidirectional antenna implemented by the first substrate 100, the second substrate 200, the circuit connection substrate 400, and the radiation antenna 300. And a non-directional antenna for MIMO using a bias effect that can realize an antenna structure capable of multi-band communication by forming a cube with a plurality of radiating antennas corresponding thereto can do.

  Due to the above technical needs, it is possible to provide a MIMO omnidirectional antenna using the bias effect, so that the structure is simple and can be expanded to various forms. There is an effect of providing a sex antenna.

Outline explanatory diagram for explaining the bias effect used in the present invention The front view and back view for showing the structure of the microstrip line of the 1st board | substrate 100 of this invention The front view and back view for showing the structure of the microstrip line of the 2nd board | substrate 200 of this invention Sectional drawing for showing the configuration of the polarized antenna of the present invention The perspective view of the omnidirectional antenna for MIMO using the bias effect of this invention Bottom perspective view of omnidirectional antenna for MIMO using the bias effect of the present invention FIG. 3 is a development view of an outer peripheral surface of a MIMO omnidirectional antenna using the bias effect of the present invention. Radiation pattern diagram showing a radiation pattern of a non-directional MIMO antenna using the bias effect of the present invention Radiation pattern diagram showing a radiation pattern of a non-directional MIMO antenna using the bias effect of the present invention Example explanatory drawing which shows one Example of this invention Example explanatory drawing which shows one Example of this invention

  Hereinafter, detailed description will be given with reference to the drawings so that those skilled in the art can easily implement the omnidirectional MIMO antenna using the bias effect of the present invention.

  FIG. 1 is a schematic diagram for explaining the bias effect used in the present invention.

  The bias effect will be briefly described with reference to FIG. 1. When a signal is applied to the microstrip formed on the circuit board, the “+” signal and the “−” signal of the applied signal are separated by the phase difference. Then, the antenna is fed by the separated signal, and a bias effect is generated.

  This is because a strip line is used on a dielectric circuit board, and an input port, a T distributor for distributing a signal, and a 180 ° signal phase converter are constituted by a metal strip line, and the metal plate is a patch antenna. This is because of the use of the bias effect generated by applying to the other radiator.

  In order to generate such a bias effect, a pair of strips polarized respectively in the x-axis and the y-axis are arranged on the same substrate so that the antenna effect is produced.

  Since a specific description related to this is a known technique described in Patent Document 1, it will be omitted.

  The MIMO omnidirectional antenna using the above-described bias effect will be described in more detail below.

  FIG. 2 is a front view and a rear view for illustrating the configuration of the microstrip line of the first substrate 100 of the present invention, and FIG. 3 is a front view of the configuration of the microstrip line of the second substrate 200 of the present invention. FIG.

  Referring to FIGS. 2 and 3, the x-axis microstrip line 110 for generating the polarization polarized in the x-axis direction is formed on one side of the circuit board. A first substrate 100 on which a y-axis microstrip line 120 for generating a polarized wave deflected in the y-axis direction is formed on the opposite side surface of the circuit board on which 110 is formed. That is, on the first substrate 100, the x-axis microstrip line 110 and the y-axis microstrip line 120 are formed on the front and back portions of the circuit board, respectively.

  Further, through holes 130 a and 130 b corresponding to the portions of the nodes 110 a and 110 b of the x-axis microstrip line 110 are formed on the circuit board surface on which the y-axis microstrip line 120 is implemented. Through holes 140a and 140b corresponding to the portions of the nodes 120a and 120b are respectively formed on the circuit board surface on which the x-axis microstrip line 110 is implemented so as to penetrate the circuit board. Further, four lead pins 310 formed on one side surface of the metal plate-shaped radiation antenna 300 are respectively coupled.

  As described above, the x-axis microstrip line 110 and the y-axis microstrip line 120 are separately implemented on both side surfaces of the circuit board when the microstrip line is implemented on the same board. In order to overcome this problem, the circuit board may be increased in size when a precise pattern is implemented.

  Here, since it is a fact that anyone skilled in the art can understand that the circuit board embodied on the same surface and the technology embodied on each substrate surface exhibit the same effect, additional explanation regarding this will be omitted. .

  In addition, the second substrate 200 constituting the MIMO antenna using the bias effect of the present invention together with the first substrate 100 is rotated by 45 ° ± 5 ° with respect to the y axis of the first substrate 100. An x-axis microstrip line 210 and a y-axis microstrip line 220 are included.

  More specifically, the x-axis microstrip line 110 of the first substrate 100 and the x-axis microstrip line 210 of the second substrate 200 and the y-axis microstrip line 120 of the first substrate 100 and the y-axis of the second substrate 200 are described. Each of the microstrip lines 220 generates an angle difference of 45 ° ± 5 °.

  In the second substrate 200, the nodes 210a and 210b of the x-axis microstrip line 210 and the nodes 220a and 220b of the y-axis microstrip line 220 are also provided on the opposite side surfaces of the circuit board, respectively. Through holes 230a and 230b and 240a and 240b are formed.

  A metal plate-shaped radiation antenna 300 for radiating signals is provided on one side of the first substrate 100 and the second substrate 200 configured as described above.

  As described above, the radiating antenna 300 includes four lead pins 310 on one side surface and is coupled to through holes formed on the respective circuit boards to constitute a circuit.

  As described above, the radiation antenna 300 is coupled to each of the first substrate 100 and the second substrate 200 to complete the polarized antenna.

  At this time, the radiating antennas 300 coupled to the first substrate 100 and the second substrate 200 are coupled apart from each other so that an air gap 150 is formed.

  This is because the resonance frequency of the polarization generated from the radiation antenna 300 is matched.

  FIG. 5 is a perspective view of an omnidirectional antenna for MIMO using the bias effect of the present invention, and FIG. 6 is a bottom perspective view of the omnidirectional antenna for MIMO using the bias effect of the present invention. 7 shows the polarization generated for each input port as a development view of the outer peripheral surface of the MIMO omnidirectional antenna using the polarization effect of the present invention.

  Referring to FIGS. 5 to 7, a detailed description will be given with reference to FIGS. 5 to 7, in which a polarized antenna completed by coupling the radiation antenna 300 to each of the first substrate 100 and the second substrate 200 is arranged on each surface. The omnidirectional antenna for MIMO is implemented.

  At this time, after arranging a plurality of the first substrate 100 and the second substrate 200 on the side surface portion, a connection circuit substrate 400 for connection is disposed on the bottom surface portion to complete the circuit network.

  Here, another first substrate 100 is disposed on a side surface adjacent to the first substrate 100. At this time, in order to implement a circuit network, the reverse first substrate 100 ′ is disposed so that the y-axis microstrip line 120 of the first substrate 100 is disposed on the front surface.

  The reverse first substrate 100 ′ is simply the reverse of the first substrate 100, and is a display for distinguishing from the normal first substrate 100, and clearly indicates that it is not another component. Further, it is clearly indicated that the arrangement is only for the configuration of a three-dimensional circuit and a network, and not due to other effects and functional differences.

  Further, after arranging the pair of first substrates 100 as described above, the second substrate 200 is arranged on the remaining side surfaces.

  Also here, the second substrate 200 and the reverse second substrate 200 ′ in which the second substrate 200 is simply reversed are arranged to embody the side surface portion of the cube.

  As described above, the first substrate 100 and the second substrate 200 are arranged to implement the side surface portion of the cube, and then the connection circuit board 400 is arranged on the bottom portion to complete the circuit network.

  At this time, a first terminal 410 and a second terminal 420 in charge of input / output are provided on one side of the wired circuit board 400, respectively.

  The first terminal 410 and the second terminal 420 as described above are respectively connected to the end portions of the strip line formed to embody a circuit on both side surfaces.

  More specifically, the first terminal 410 is connected to the end of the strip line formed on the upper end surface of the connection circuit board 400 through the circuit board, and the second terminal is connected to the opposite side of the connection circuit board 400. Terminals 420 are respectively connected.

  When a signal is applied to the MIMO omnidirectional antenna using the bias effect of the present invention configured as described above, the signal is radiated by the bias antennas disposed on the respective surfaces (FIGS. 8 and 9). reference).

  FIG. 8 shows a radiation pattern when a signal is applied to the first terminal 410, and FIG. 9 shows a radiation pattern when a signal is applied to the second terminal 420.

  At this time, when a signal is applied to the first terminal 410 and the second terminal 420, the signal radiated through the respective polarized antennas is radiated to a uniform range around the antenna, and serves as an omnidirectional antenna. can do.

  A signal radiated by using such an omnidirectional antenna can radiate not only a single frequency signal but also a plurality of frequency signals. Since this uses the bias effect described in Patent Document 1, a detailed description thereof will be omitted.

  As described above, the frequency for transmitting and receiving the MIMO omnidirectional antenna using the bias effect of the present invention can be selected by adjusting the size of the metal plate-shaped radiating antenna 300. It differs depending on the length of the plate-shaped radiation antenna 300. This can be understood by anyone skilled in the art.

  10 and 11 are exemplary views showing an embodiment of the present invention.

  Referring to FIG. 10 and FIG. 11, the MIMO omnidirectional antenna using the bias effect of the present invention can be applied as a single structure, and one frequency is used depending on the amount of frequency used. A multi-band MIMO omnidirectional antenna can be implemented by forming a plurality of strip lines on a substrate and providing a plurality of radiation antennas.

At this time, it is preferable that the number of strip lines embodied on one substrate and the number of coupled radiation antennas is ²ⁿ .

  By the method as described above, a two-stage multiband MIMO omnidirectional antenna and a four-stage multiband MIMO omnidirectional antenna in which two striplines and a radiating antenna are combined on one substrate are implemented. be able to.

  More specifically, after arranging a plurality of substrates provided with a strip line and a radiation antenna on the side surface portion, the connection circuit substrate is coupled to the open portion at the lower end portion to complete the structure.

  In order to implement such a structure, the same method as that of the above-described single structure is applied. Further, in the case of a two-stage or four-stage multiband antenna, there is only a difference in the number of strip lines and radiation antennas implemented on one circuit board.

  By the above method, a MIMO antenna and a multiband MIMO antenna using the bias effect of the present invention can be implemented.

  Here, it is clarified that the multiband MIMO antenna can be expanded within the scope of the technical idea of the present invention only to distinguish it from a single structure.

DESCRIPTION OF SYMBOLS 100 1st board | substrate 110 x-axis microstrip line 120 y-axis microstrip line 200 2nd board | substrate 210 x-axis microstrip line 220 y-axis microstrip line 300 Radiation antenna 400 Connection circuit board

Claims (5)

An antenna using a bias effect by applying an input port, a T distributor for distributing a signal, and a 180 ° signal phase converter to a dielectric substrate by a metal strip line and applying a metal plate as a radiator of a patch antenna. In implementing an omnidirectional antenna on the base,
An x-axis microstrip line 110 is formed on one side so that the signal can be polarized in the x-axis direction, and a y-axis microstrip is provided on the other side so that the signal can be polarized in the y-axis direction. The line 120 is formed, corresponds to the portions of the nodes 110a and 110b of the x-axis microstrip line 110, is formed so as to penetrate the circuit board, and is provided on the substrate surface on which the y-axis microstrip line 120 is formed. Through holes provided on the substrate surface corresponding to the holes 130a and 130b and the nodes 120a and 120b of the y-axis microstrip line 120 and formed so as to penetrate the circuit board and on which the x-axis microstrip line 110 is formed. A first substrate 100 comprising holes 140a, 140b;
An x-axis microstrip formed by the same structure as that of the first substrate 100 and rotated by 45 ° ± 5 ° about the y-axis about the x-axis microstrip line and the y-axis microstrip line embodied on the substrate surface A second substrate 200 in which the line 210 and the y-axis microstrip line 220 are implemented on the substrate;
A metal plate-shaped radiating antenna 300 for radiating a signal, which is coupled to one side of the first substrate 100 and the second substrate 200 to form a circuit network;
A connection circuit board 400 for connecting the first substrate 100 and the second substrate 200;
A MIMO non-directional antenna using a bias effect, wherein the first substrate 100 and the second substrate 200 are combined with a wired circuit board 400 to form a cubic structure. In realizing the omnidirectional antenna using the bias effect, the first substrate 100 having the x-axis microstrip line 110 disposed on the front surface thereof, and the y-axis microstrip line 120 with the first substrate 100 reversed is provided. The reverse first substrate 100 ′ disposed on the front surface, the second substrate 200 on which the x-axis microstrip line 210 is disposed on the front surface, and the y-axis microstrip line 220 on the front surface with the second substrate 200 reversed. The reverse second substrate 200 ′ is arranged on the side surface, and is arranged as a housing structure so that the side surfaces of the respective substrates are coupled, and the wired circuit board 400 is coupled to the open portion at the lower end. Then, the radiating antenna 300 is coupled to the front portion of each substrate to complete the omnidirectional antenna for MIMO using the bias effect. Na. A first terminal 410 and a second terminal 420 for applying signals are formed on the bottom surface of the wired circuit board 400, and the first terminal 410 is connected to a strip line formed on one side through the circuit board. The MIMO non-directional antenna using the bias effect according to claim 1, wherein the second terminal 420 is connected to a strip line formed on the other side surface. 4. The bias according to claim 3, wherein when different signals are applied to the first terminal 410 and the second terminal 420 and the signals are biased to radiate a plurality of frequencies, the signals are not mixed. An omnidirectional antenna for MIMO using effects. A plurality of strip lines are respectively formed on the first substrate 100 and the second substrate 200 of the cube-shaped omnidirectional antenna embodied by the first substrate 100, the second substrate 200, the circuit connection substrate 400, and the radiation antenna 300. 5. The antenna structure according to claim 1, wherein an antenna structure capable of multiband communication can be realized by forming a cube with a plurality of radiation antennas corresponding to the antenna. Omnidirectional antenna using MIMO.

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