JP2020080487A - Antenna, wireless communication equipment and antenna formation method - Google Patents

Abstract

To provide an antenna, as a dipole antenna, capable of uniformly outputting a polarized wave of a radio wave in all directions.SOLUTION: The antenna comprises: a half-wavelength dipole antenna 4 formed by arranging elements having lengths of half-wavelength at vertically symmetrical positions; and a Z-shaped half-wavelength Z-shaped contactless element 6 having length of a half-wavelength length. The half-wavelength Z-shaped contactless element 6 is disposed at a position where it is spatially coupled to the half-wave dipole antenna 4 in a contactless condition. A central part of the half-wavelength Z-shaped contactless element 6 is disposed to be closest to a central part where a feeding point 4a of the half-wave dipole antenna 4 is located. The half-wavelength Z-shaped contactless element 6 is disposed while extended in a direction orthogonal to the half-wave dipole antenna 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antenna, a wireless communication device and an antenna forming method, and more particularly to an antenna using a dipole antenna, a wireless communication device and an antenna forming method.

  For communication between wireless communication devices, it is important that any device can communicate seamlessly. For example, a wireless master device or a wireless base station, which is an example of a wireless communication device, is responsible for seamless communication with any wireless slave device. For that purpose, the antenna mounted on the wireless communication device is the most important component and must be optimized so that seamless communication is possible.

  However, it is unacceptable to the user that the cost of the antenna becomes expensive due to the optimization. There is a need for technological development that makes it possible to provide an antenna that is inexpensive and that can exhibit good performance. For example, in Japanese Unexamined Patent Application Publication No. 2017-139685 “Antenna device and wireless communication device” of Patent Document 1, although the antenna is limited to an SSR (Split-Ring-Resonator) antenna, the antenna is arranged in a direction perpendicular to the substrate surface. A technical proposal has been made that installation can be realized at low cost.

JP, 2017-139685, A

  A WiFi home router (wireless master device), which is an example of a wireless communication device used for home use, performs wireless communication with various wireless slave devices. Examples of wireless slave devices include smartphones and PCs (Personal Computers). Usually, the wireless slave device moves around the house and is used in various postures. In the wireless communication between the wireless master device and the wireless slave device, it is important that the polarizations of the radio waves between them match each other. If they do not match, it is difficult for the radio wave from the wireless master device or the wireless slave device to reach the partner's wireless communication device, and the wireless communication is likely to be interrupted.

  FIG. 7 is an image diagram showing a matched state and a mismatched state of polarization of radio waves in two general dipole antennas. FIG. 7A shows a state in which the radio waves of the two dipole antennas have the same polarization, and FIG. 7B shows a state in which the polarizations of the radio waves of the two dipole antennas are not the same. Is shown. The polarized wave of the radio wave is generated on the same plane as the antenna element. Therefore, as shown in FIG. 7A, when the two antennas 11B and 12B are arranged in parallel, the polarized waves of the radio waves in both antennas are in the same state, and the radio waves must be caught by each other. Is possible. However, as shown in FIG. 7B, in a state where the two antennas 11B and 12B are arranged orthogonally, it is theoretical that the polarized waves of the radio waves in the two antennas do not match each other and the radio waves are caught by each other. I can't go up.

  However, even in the state where the two antennas 11B and 12B are arranged orthogonally as shown in FIG. 7B, the polarized waves in the antennas 11B and 12B are not orthogonal because of the reflection on the wall or the like. It is often possible to send and receive over distance. However, when the two antennas 11B and 12B are arranged orthogonally to each other, the electric field strength of the arriving radio wave is weak and the communication is easily interrupted.

  FIG. 8 is a schematic diagram showing an antenna configuration of a general home router using a dipole antenna of the current technology. FIG. 8A is a perspective view showing the appearance of the home router 10B, and FIG. 8B is a schematic diagram showing the internal antenna configuration of the home router 10B in an enlarged manner compared to FIG. 8A. Is. As shown in the perspective view of FIG. 8A, the substrate 2 is mounted in the housing 1 of the home router 10B in a state perpendicular to the ground. Then, as shown in FIG. 8B, a wireless IC (Integrated Circuit) 3 is mounted on the substrate 2. The wireless IC 3 is connected to the feeding point 4a of the half-wave dipole antenna 4 via a coaxial cable 5. By using the coaxial cable 5, it is possible to feed power from the wireless IC 3 to the feeding point 4a of the half-wave dipole antenna 4 while suppressing power loss.

  Further, the half-wave dipole antenna 4 is arranged in parallel with the surface of the substrate 2 and mounted in a state perpendicular to the ground. Therefore, the half-wavelength dipole antenna 4 outputs only polarized waves perpendicular to the ground. Therefore, when the state of the antenna on the side of the wireless slave device wirelessly connected to the home router 10B changes to the state parallel to the ground and only the polarized wave horizontal to the ground is required, Communication with the home router 10B becomes difficult. That is, as the antenna configuration of the home router 10B in which the posture of the wireless slave device which is a communication partner is assumed to change into various states, communication in which only vertical polarization as shown in FIG. It is hard to say that the antenna that is in the state is the optimum antenna configuration.

  Further, FIG. 9 is a schematic diagram showing a setting state of the X axis, the Y axis, and the Z axis when expressing the antenna radiation pattern of the half-wavelength dipole antenna 4 of the home router 10B shown in FIG. FIG. 9A is a schematic diagram showing the positional relationship on the X, Y, and Z axes of the substrate 2, the wireless IC 3, the half-wavelength dipole antenna 4, and the coaxial cable 5 of the home router 10B shown in FIG. FIG. 9B is a schematic diagram showing the positional relationship between the three surfaces XZ, YZ, and XY and the half-wavelength dipole antenna 4 for expressing the antenna radiation pattern of the half-wavelength dipole antenna 4. The conceptual diagrams of the positional relationship between the XZ, YZ, and XY planes shown in FIGS. 9A and 9B and the half-wavelength dipole antenna 4 are generally used when expressing an antenna radiation pattern. It is an expression method. With reference to the conceptual diagram of FIG. 9, electric field strengths of orthogonal polarizations and parallel polarizations that are orthogonal to each of the three planes of XZ, YZ, and XY can be drawn as characteristic curves. The antenna radiation pattern can be represented as 10.

  FIG. 10 is a pattern diagram showing an antenna radiation pattern of the half-wavelength dipole antenna 4 of the home router 10B shown in FIG. 8, and the half-wavelength dipole antenna 4 having the positional relationship as shown in the schematic view of FIG. 9B. The antenna radiation patterns on the XZ plane, the YZ plane, and the XY plane are shown. Note that, in FIG. 10, the horizontal polarization characteristic curve of the antenna radiation pattern is shown by a thick line, and the vertical polarization characteristic curve of the antenna radiation pattern is shown by a thin line. As shown in the pattern diagram of FIG. 10, in the XZ plane and the YZ plane, there are polarized waves parallel to each surface, that is, vertical polarized waves, but there is no polarized wave orthogonal to each surface, that is, horizontal polarized wave. I understand. Further, it can be seen that in the XY plane, there is a polarized wave orthogonal to the XY plane, that is, a vertical polarized wave, but there is no polarized wave parallel to the XY plane, that is, a horizontal polarized wave. Therefore, it is hard to say that the antenna of the half-wavelength dipole antenna 4 as shown in FIG. 8 can output the polarized wave of the radio wave evenly in all directions and can perform communication in any direction. It is a composition.

(Purpose of the present disclosure)
In view of the above-described antenna problem of the dipole antenna, an object of the present disclosure is to provide an antenna, a wireless communication device, and an antenna forming method capable of uniformly outputting polarized waves of a radio wave in all directions as a dipole antenna. It is in.

  In order to solve the above problems, the antenna, the wireless communication device, and the antenna forming method according to the present invention mainly employ the following characteristic configurations.

(1) The antenna according to the present invention is
A half-wavelength dipole antenna formed by arranging half-wavelength elements at vertically symmetrical positions at an arbitrary frequency specified in advance,
A Z-shaped half-wavelength Z-shaped non-contact element having a half-wavelength length;
Have
The half-wavelength Z-shaped non-contact element is arranged at a position where it is spatially coupled to the half-wavelength dipole antenna in a non-contact state,
And,
The central portion of the half-wavelength Z-shaped non-contact element is arranged so as to be closest to the central portion where the feeding point of the half-wavelength dipole antenna is located,
And,
Arranging the half-wavelength Z-shaped non-contact element in a state of extending in a direction orthogonal to the half-wavelength dipole antenna,
It is characterized by

(2) The wireless communication device according to the present invention is
Equipped with a half-wavelength dipole antenna formed by arranging half-wavelength elements at vertically symmetrical positions at an arbitrary frequency specified in advance,
A substrate having a wireless IC (Integrated Circuit) connected to a feeding point of the half-wave dipole antenna;
A Z-shaped half-wavelength Z-shaped non-contact element having a half-wavelength length;
Have
The half-wavelength Z-shaped non-contact element is arranged at a position where it is spatially coupled to the half-wavelength dipole antenna in a non-contact state,
And,
The central portion of the half-wavelength Z-shaped non-contact element is arranged so as to be closest to the central portion where the feeding point of the half-wavelength dipole antenna is located,
And,
Arranging the half-wavelength Z-shaped non-contact element in a state of extending in a direction orthogonal to the half-wavelength dipole antenna,
It is characterized by

(3) The antenna forming method according to the present invention is
A half-wavelength dipole antenna formed by arranging half-wavelength elements at vertically symmetrical positions at an arbitrary frequency specified in advance,
A Z-shaped half-wavelength Z-shaped non-contact element having a half-wavelength length;
Are placed in positions where they are spatially coupled to each other in a non-contact state,
And,
The central portion of the half-wavelength Z-shaped non-contact element is arranged so as to be closest to the central portion where the feeding point of the half-wavelength dipole antenna is located,
And,
Arranging the half-wavelength Z-shaped non-contact element in a state of extending in a direction orthogonal to the half-wavelength dipole antenna,
It is characterized by

  According to the antenna, the wireless communication device and the antenna forming method of the present invention, the following effects can be mainly achieved.

  That is, according to the present invention, the half-wavelength Z-shaped non-contact elements arranged so as to extend in the direction orthogonal to the half-wavelength dipole antenna are arranged such that the central portions of the half-wavelength Z-shaped non-contact elements are closest to each other. Since it can be spatially coupled to the antenna, it is possible to improve the polarization characteristics of radio waves, which is essential for improving wireless communication performance as an antenna structure, and it is also possible to realize it inexpensively and simply. Is becoming

It is a schematic diagram which shows an example of the antenna structure of the antenna which concerns on this invention. FIG. 2 is a schematic diagram showing an example of an antenna configuration of a home router using the antenna shown in FIG. 1 as an example of the present invention. FIG. 3 is a pattern diagram showing an example of an antenna radiation pattern of the antenna of the home router shown in FIG. 2. FIG. 3 is a schematic diagram showing an example of an antenna configuration different from that of FIG. 2 of a home router using the antenna shown in FIG. 1 as an example of the present invention. It is a schematic diagram which shows the example different from FIG. 1 of the antenna structure of the antenna which concerns on this invention. FIG. 6 is a pattern diagram showing an example of an antenna radiation pattern when the antenna of FIG. 5 is mounted instead of the antenna of FIG. 1 as the antenna of the home router shown in FIG. 2. It is an image figure which shows the matching state and the mismatching state of the polarization of a radio wave in two general dipole antennas. It is a schematic diagram which shows the antenna structure of the general home router using the dipole antenna of the present technology. FIG. 9 is a schematic diagram showing a setting state of X-axis, Y-axis, and Z-axis when expressing an antenna radiation pattern of the half-wavelength dipole antenna of the home router shown in FIG. 8. 9 is a pattern diagram showing an antenna radiation pattern of the half-wavelength dipole antenna of the home router shown in FIG. 8. FIG.

  Preferred embodiments of an antenna, a wireless communication device, and an antenna forming method according to the present invention will be described below with reference to the accompanying drawings. The antenna according to the present invention relates to a dipole antenna that radiates a radio wave having an arbitrary wavelength, and the wireless communication device according to the present invention relates to a wireless communication device equipped with the dipole antenna. In addition, the drawing reference symbols attached to the following drawings are added for convenience to each element as an example for helping understanding, and it goes without saying that the present invention is not intended to be limited to the illustrated embodiments. Yes.

(Characteristics of the present invention)
Prior to the description of the embodiments of the present invention, the features of the present invention will be outlined first. The present invention relates to a half-wavelength dipole antenna in which elements having a half-wavelength length are arranged vertically symmetrically at an arbitrary frequency designated in advance, and an element capable of extending in a direction orthogonal to the half-wavelength dipole antenna. And a Z-shaped parasitic element, the parasitic element having a spatial coupling (non-contact) relationship with the half-wavelength dipole antenna, and the central portion of the parasitic element has a half-wavelength dipole antenna. The main feature is that the parasitic element is arranged close to the central portion where the feeding point is located and the parasitic element has a length of about a half wavelength. That is, the main feature of the present invention is that it is formed as a (dipole+Z-shaped contactless parasitic) antenna having the above-mentioned structure.

(Example of configuration of the embodiment of the present invention)
Next, an example of the antenna configuration of the antenna according to the present invention will be described first with reference to FIG. FIG. 1 is a schematic diagram showing an example of an antenna configuration of an antenna according to the present invention. Here, FIG. 1A illustrates a case where the antenna which is an example of the present invention is viewed from the front, and FIG. 1B illustrates a case where the antenna which is an example of the present invention is viewed from a side. As an example of the present invention, the antenna 11 shown in FIG. 1 is intended for a half-wavelength dipole antenna similar to the half-wavelength dipole antenna 4 of the home router 10B shown in FIG.

  As shown in FIGS. 1(A) and 1(B), an antenna 11 which is an example of the present invention has a feeding point 4a provided at the center of the half-wavelength dipole antenna 4 in addition to the half-wavelength dipole antenna 4. At a position of the half-wavelength dipole antenna 4 in a non-contact state and in a state of being close to the half-wavelength dipole antenna 4 (a state of being spatially coupled), a parasitic element having a Z-shape with a half-wavelength is connected to the half-wavelength Z-shaped non-contact. It is arranged as an element 6. That is, the antenna 11 is formed as (half-wavelength dipole antenna 4+half-wavelength Z-shaped non-contact element 6).

  Here, the feeding point 4a is a portion where signal power is fed to the antenna 11 via a coaxial cable or a strip line, and is a half-wavelength dipole in which two elements are linearly extended in a vertically symmetrical state. This is the beginning of the antenna 4. Further, the target wavelength is a wavelength at a frequency arbitrarily designated in advance, and the half wavelength length of each of the two elements constituting the half-wavelength dipole antenna 4 is also the length at an arbitrary frequency designated beforehand. Is.

  The half-wavelength Z-shaped non-contact element 6 is composed of three parts, an upper side element, a connecting element and a lower side element, which are formed by bending a single half-wavelength linear element at a right angle. There is. Then, as shown in FIG. 1(A), the upper side element and the lower side element are respectively in opposite directions to each other from the end to which the connecting element is connected, on a plane perpendicular to the connecting element. It is formed as a Z-shaped element by arranging it in a state of being extended. That is, the upper side element and the lower side element are in a positional relationship parallel to each other and orthogonal to the connecting element. Then, the connecting element is arranged so as to be parallel to the half-wave dipole antenna 4, with the central portion of the half-wave dipole antenna 4 where the feeding point 4a is located and the central portion of the connecting element being close to each other. As a result, the upper side element and the lower side element are arranged so as to be orthogonal to the half-wave dipole antenna 4.

  That is, the connecting element connecting the upper side element and the lower side element of the half-wavelength Z-shaped non-contact element 6 has a positional relationship parallel to the half-wavelength dipole antenna 4, and both the upper side element and the lower side element are connected. Are arranged so as to be orthogonal to the half-wave dipole antenna 4. In other words, the half-wavelength Z-shaped non-contact element 6 has the upper side element and the lower side element extending in the direction orthogonal to the half-wavelength dipole antenna 4.

  Then, the half-wavelength Z-shaped non-contact element 6 is in a non-contact state with the half-wavelength dipole antenna 4 and the half-wavelength Z-shaped non-contact element 6 with respect to the central portion of the half-wavelength dipole antenna 4, that is, the feeding point 4a. Are arranged so that the central portions of the are closest to each other.

  As described above, by disposing the central portion of the half-wavelength Z-shaped non-contact element 6 close to the central portion of the half-wavelength dipole antenna 4 to form a (dipole+Z-shaped non-contact non-powered) antenna, Although the details will be described later, it becomes possible to reduce the number of surfaces where the polarized wave of the radio wave is not output from the antenna 11.

  Next, as an example of the wireless communication apparatus according to the present invention, a configuration example of a wireless communication apparatus equipped with the antenna 11 shown as an example of the present invention in FIG. 1 will be described with reference to FIG. Here, the wireless communication apparatus of FIG. 2 will be described as an example of the case of a home router similar to the home router 10B shown in FIG. 8 as a current technology.

  FIG. 2 is a schematic diagram showing an example of an antenna configuration of a home router using the antenna 11 shown in FIG. 1 as an example of the present invention. 2(A) is a perspective view showing the appearance of the home router 10, and FIG. 2(B) is a schematic diagram showing the internal antenna configuration of the home router 10 in an enlarged manner as compared with FIG. 1(A). Is.

  As shown in the perspective view of FIG. 2A, the substrate 2 is mounted in the housing 1 of the home router 10 in a state perpendicular to the ground. Then, as shown in FIG. 2B, a wireless IC (Integrated Circuit) 3 is mounted on the substrate 2, and the wireless IC 3 has a feeding point 4 a of the half-wave dipole antenna 4 and a coaxial cable 5. Connected through. As described above, by using the coaxial cable 5, it is possible to output the signal from the wireless IC 3 to the feeding point 4a of the half-wave dipole antenna 4 while suppressing loss of signal power. Note that instead of the coaxial cable 5, a strip line may be used to connect the wireless IC 3 and the feeding point 4a of the half-wave dipole antenna 4.

  Further, as described as the antenna 11 in FIG. 1, the half-wavelength Z-shaped non-contact element 6 is arranged so as to be close to the feeding point 4a located at the center of the half-wavelength dipole antenna 4. That is, as shown in FIG. 1, the antenna 11 has a half-wavelength Z-shaped non-contact element 6 in addition to the antenna structure shown in FIG. More precisely, it is formed as (non-contact non-feeding) antenna (half-wavelength dipole antenna 4+half-wavelength Z-shaped non-contact element 6).

  FIG. 3 is a pattern diagram showing an example of an antenna radiation pattern of the antenna 11 of the home router 10 shown in FIG. 2 (that is, a (dipole+Z-shaped non-contact non-feeding) antenna). The XZ plane and the YZ plane of the antenna 11 are shown. , XY planes, respectively, showing antenna radiation patterns. The horizontal polarization characteristic curve is shown by a thick line, and the vertical polarization characteristic curve is shown by a thin line. As shown in the pattern diagram of FIG. 3, among the three planes of the XZ plane, the YZ plane, and the XY plane, except for the vertically polarized wave of the XZ plane, the polarized wave of the radio wave exists.

  In the antenna radiation pattern in the case where only the half-wavelength dipole antenna 4 like the antenna shown in FIG. 8 is used as the current technology, as shown in FIG. 10, all of the XZ plane, the YZ plane, and the XY plane are used. There was no vertical polarization of radio waves. Compared with the case of the current technology, the antenna configuration of the antenna 11 of the home router 10 shown in FIG. 2 indicates that the demand for uniform communication in all directions is approaching.

(Configuration example of another embodiment of the present invention)
Next, a different configuration example of the wireless communication device according to the present invention will be described with reference to FIG. Here, the wireless communication device of FIG. 4 will be described by taking a home router similar to that described above with reference to FIG. 2 as an example. FIG. 4 is a schematic diagram showing an example of an antenna configuration different from that of FIG. 2 of a home router using the antenna 11 shown in FIG. 1 as an example of the present invention. That is, the home router 10A of FIG. 4 shows an example of mounting an antenna different from the case of the home router 10 of FIG.

  In the home router 10A of FIG. 4, the half-wave dipole antenna 4 of the antenna 11 is directly mounted on the substrate 2, and the feeding point 4a and the wireless IC 3 are connected by using a coaxial cable or a strip line 5A. I am trying. In other words, if the component mounting space on the substrate 2 has a margin, if the half-wavelength dipole antenna 4 of the antenna 11 is directly mounted on the substrate 2, the cost can be reduced as compared with the case of FIG. it can.

  With the change of the mounting position of the half-wavelength dipole antenna 4 from FIG. 2, the center portion of the half-wavelength Z-shaped non-contact element 6 of the antenna 11 is also located at the center portion of the half-wavelength dipole antenna 4. 2 has moved to a position close to the feeding point 4a of FIG. 2 and has the same positional relationship as the antenna 11 shown in FIG. Therefore, the antenna radiation pattern of the antenna 11 in the home router 10A of FIG. 4 is almost the same as the antenna radiation pattern of FIG. 3 described above in the home router 10 of FIG.

  Next, an antenna configuration different from the antenna 11 shown in FIG. 1 will be described with reference to FIG. FIG. 5 is a schematic diagram showing an example of the antenna configuration of the antenna according to the present invention, which is different from the example shown in FIG. Here, FIG. 5A shows a case where the antenna 11A which is an example different from FIG. 1 of the present invention is viewed from the front, and FIG. 5B shows an antenna which is an example different from FIG. 1 of the present invention. 11A shows a case where 11A is viewed from the side. As in the case of the antenna 11 of FIG. 1, the antenna 11A shown in FIG. 5 is close to the position of the feeding point 4a provided in the central portion of the half-wavelength dipole antenna 4 without being in contact with the half-wavelength dipole antenna 4. Although arranged in a state (spatial coupling state), the shape of the half-wavelength Z-shaped parasitic element having a half-wavelength length is different from that of the half-wavelength Z-shaped non-contact element 6 of FIG. .

  That is, the half-wavelength Z-shaped parasitic element in the antenna 11A shown in FIG. 5 is the half-wavelength Z-shaped non-contact element shown in FIG. 1 as shown in FIGS. 5(A) and 5(B). The upper side element 6 has a shape twisted by 90 degrees, and is formed as a half-wave twist Z-shaped non-contact element 6A.

  That is, the half-wavelength twisted Z-shaped non-contact element 6A connects the upper side element of the half-wavelength Z-shaped non-contact element 6 shown in FIG. 1 with the end portion to which the connection element is connected as the center. The surface orthogonal to the sub-element has a shape twisted by 90 degrees (folded shape). When the upper-side element and the lower-side element are extended, the positional relationship becomes orthogonal to each other. In other words, in the half-wavelength twisted Z-shaped non-contact element 6A, the upper side element and the lower side element extending in the direction orthogonal to the half-wavelength dipole antenna 4 further extend in the directions orthogonal to each other. Is formed.

  FIG. 6 is a pattern diagram showing an example of an antenna radiation pattern when the antenna 11A of FIG. 5 is mounted instead of the antenna 11 of FIG. 1 as the antenna of the home router 10 shown in FIG. The antenna radiation patterns are shown in each of the plane, the YZ plane, and the XY plane. The horizontal polarization characteristic curve is shown by a thick line, and the vertical polarization characteristic curve is shown by a thin line.

  As shown in the pattern diagram of FIG. 6, horizontal polarization and vertical polarization of radio waves exist on all three surfaces of the XZ plane, the YZ plane, and the XY plane. In the pattern diagram shown in FIG. 10 as the current technology, in the case where there is no vertical polarization of the radio wave in all three planes of the XZ plane, the YZ plane, and the XY plane, or in the pattern diagram shown in FIG. , The antenna 11A shown in FIG. 6 adopts a half-wave twist Z-shaped non-contact element 6A in which elements are arranged in directions orthogonal to each other as compared with the case where there is no vertically polarized wave in the XZ plane. , It is possible to communicate in all directions. However, since the original power is distributed, the individual radiated powers of the three surfaces of the XZ plane, the YZ plane, and the XY plane are small.

  In the case where the antenna 11A including the half-wavelength dipole antenna 4 and the half-wavelength twisted Z-shaped non-contact element 6A shown in FIG. 5 is mounted as a home router, the board is similar to the case of the home router 10A in FIG. If the component mounting space on 2 is large, the half-wave dipole antenna 4 of the antenna 11A may be directly mounted on the substrate 2.

(Explanation of the effect of the embodiment)
As described in detail above, the following effects can be achieved in the embodiment according to the present invention.

  That is, with respect to the dipole antenna, the Z-shaped non-contact element and the upper side element in which the upper side element and the lower side element extending in the direction orthogonal to each other are further twisted by 90 degrees and extend in the direction orthogonal to each other. By adopting the structure in which the twisted Z-shaped non-contact element is arranged, it is possible to improve the polarization characteristic of the radio wave which is essential for improving the wireless communication performance as an antenna structure, and it is cheap and simple. It is also possible to realize.

  The configuration of the preferred embodiment of the present invention has been described above. However, it should be noted that such an embodiment is merely an example of the present invention and does not limit the present invention in any way. Those skilled in the art can easily understand that various modifications and changes can be made according to a specific application without departing from the scope of the present invention.

1 case 2 substrate 3 wireless IC
4 Half-wavelength dipole antenna 4a Feed point 5 Coaxial cable 5A Coaxial cable or stripline 6 Half-wavelength Z-shaped non-contact element 6A Half-wave twist Z-shaped non-contact element 10 Home router 10A Home router 10B Home router 11 Antenna 11A Antenna 11B Antenna 12B antenna

Claims (10)

A half-wavelength dipole antenna formed by arranging half-wavelength elements at vertically symmetrical positions at an arbitrary frequency specified in advance,
A Z-shaped half-wavelength Z-shaped non-contact element having a half-wavelength length;
Have
The half-wavelength Z-shaped non-contact element is arranged at a position where it is spatially coupled to the half-wavelength dipole antenna in a non-contact state,
And,
The central portion of the half-wavelength Z-shaped non-contact element is arranged so as to be closest to the central portion where the feeding point of the half-wavelength dipole antenna is located,
And,
Arranging the half-wavelength Z-shaped non-contact element in a state of extending in a direction orthogonal to the half-wavelength dipole antenna,
An antenna characterized by that. The half-wavelength Z-shaped non-contact element includes an upper side element, a connection element and a lower side element formed by bending a half-wavelength linear element at a right angle,
And,
The upper side element and the lower side element are respectively arranged in a state in which they extend from the ends to which the connecting element is connected, on the surfaces perpendicular to the connecting element in mutually opposite directions. ,
And,
Arranging the connecting element so as to be parallel to the half-wave dipole antenna,
The antenna according to claim 1, wherein: The upper side element of the half-wavelength Z-shaped non-contact element is further twisted by 90 degrees on a plane perpendicular to the connecting section element with the end portion to which the connecting section element is connected as the center, and the upper side A half-wave twist Z-shaped non-contact element arranged in a positional relationship such that the sub-element and the lower side element are orthogonal to each other,
The antenna according to claim 2, wherein: Equipped with a half-wavelength dipole antenna formed by arranging half-wavelength elements at vertically symmetrical positions at an arbitrary frequency specified in advance,
A substrate having a wireless IC (Integrated Circuit) connected to a feeding point of the half-wave dipole antenna;
A Z-shaped half-wavelength Z-shaped non-contact element having a half-wavelength length;
Have
The half-wavelength Z-shaped non-contact element is arranged at a position where it is spatially coupled to the half-wavelength dipole antenna in a non-contact state,
And,
The central portion of the half-wavelength Z-shaped non-contact element is arranged so as to be closest to the central portion where the feeding point of the half-wavelength dipole antenna is located,
And,
Arranging the half-wavelength Z-shaped non-contact element in a state of extending in a direction orthogonal to the half-wavelength dipole antenna,
A wireless communication device characterized by the above. The half-wavelength Z-shaped non-contact element includes an upper side element, a connection element and a lower side element formed by bending a half-wavelength linear element at a right angle,
And,
The upper side element and the lower side element are respectively arranged in a state in which they extend from the ends to which the connecting element is connected, on the surfaces perpendicular to the connecting element in mutually opposite directions. ,
And,
Arranging the connecting element so as to be parallel to the half-wave dipole antenna,
The wireless communication device according to claim 4, wherein. The upper side element of the half-wavelength Z-shaped non-contact element is further twisted by 90 degrees on a plane perpendicular to the connecting section element with the end portion to which the connecting section element is connected as the center, and the upper side A half-wave twist Z-shaped non-contact element arranged in a positional relationship such that the sub-element and the lower side element are orthogonal to each other,
The wireless communication device according to claim 5, wherein: The half-wavelength Z-shaped non-contact element or the half-wavelength twisted Z-shaped non-contact element is mounted on the substrate, or mounted in a place different from the substrate.
The wireless communication device according to any one of claims 4 to 6, wherein A half-wavelength dipole antenna formed by arranging half-wavelength elements at vertically symmetrical positions at an arbitrary frequency specified in advance,
A Z-shaped half-wavelength Z-shaped non-contact element having a half-wavelength length;
Are placed in positions where they are spatially coupled in a non-contact state,
And,
The central portion of the half-wavelength Z-shaped non-contact element is arranged so as to be closest to the central portion where the feeding point of the half-wavelength dipole antenna is located,
And,
Arranging the half-wavelength Z-shaped non-contact element in a state of extending in a direction orthogonal to the half-wavelength dipole antenna,
An antenna forming method characterized by the above. The half-wavelength Z-shaped non-contact element includes an upper side element, a connecting element and a lower side element formed by bending a half-wavelength linear element at a right angle,
And,
The upper side element and the lower side element are respectively arranged in a state in which they extend from the ends to which the connecting element is connected, on the surfaces perpendicular to the connecting element in mutually opposite directions. ,
And,
Arranging the connecting element so as to be parallel to the half-wave dipole antenna,
The antenna forming method according to claim 8, wherein The upper side element of the half-wavelength Z-shaped non-contact element is further twisted by 90 degrees on a plane perpendicular to the connecting section element with the end portion to which the connecting section element is connected as the center, and the upper side A half-wave twist Z-shaped non-contact element arranged in a positional relationship such that the sub-element and the lower side element are orthogonal to each other,
The method for forming an antenna according to claim 9, wherein:

Images