JP7014425B2 - Antenna, wireless communication equipment and antenna forming method - Google Patents

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 unit or a wireless base station, which is an example of a wireless communication device, is responsible for seamless communication regardless of any wireless slave unit. For that purpose, the antenna mounted on the wireless communication device is the most important component and must be optimized to enable seamless communication.

However, it is unacceptable to users that the price of the antenna becomes expensive due to optimization. It is necessary to develop technology that makes it possible to provide an antenna that is inexpensive and can exhibit good performance. For example, in Japanese Patent Application Laid-Open No. 2017-139685 “Antenna device and wireless communication device” of Patent Document 1, the antenna is limited to an SSR (Split-Ring-Resonator) antenna, but the antenna is used in the direction perpendicular to the substrate surface. A technical proposal has been made that the installation can be realized at low cost.

Japanese Unexamined Patent Publication No. 2017-139685

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

FIG. 7 is an image diagram showing a matching state and a disagreeing state of the polarization of radio waves in two general dipole antennas. FIG. 7A shows a state in which the polarizations of the radio waves of the two dipole antennas match, and FIG. 7B shows a state in which the polarizations of the radio waves of the two dipole antennas do not match. Is shown. The polarization of radio waves occurs 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 polarizations of the radio waves in both antennas are in the same state, and the radio waves are 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 a theory that the polarizations of the radio waves in both antennas are inconsistent and the radio waves are caught by each other. I can't go up.

However, even in a state where the two antennas 11B and 12B are arranged orthogonally as shown in FIG. 7B, the polarizations of the antennas 11B and 12B are not orthogonal due to reflection on a wall or the like, and are close to each other. It is often possible to send and receive at a distance. However, when the two antennas 11B and 12B are arranged orthogonally, the electric field strength of the radio wave that reaches 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. 8 (A) is a perspective view showing the appearance of the home router 10B, and FIG. 8 (B) is a schematic view showing the antenna configuration inside the home router 10B in an enlarged manner as compared with FIG. 8 (A). 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-wavelength dipole antenna 4 via a coaxial cable 5. By using the coaxial cable 5, it is possible to supply power from the wireless IC 3 to the feeding point 4a of the half-wavelength dipole antenna 4 while suppressing power loss.

Further, the half-wavelength dipole antenna 4 is arranged parallel to the surface of the substrate 2 and mounted in a state perpendicular to the ground. Therefore, only the polarization perpendicular to the ground is output from the half-wavelength dipole antenna 4. Therefore, when the antenna state on the wireless slave unit side wirelessly connected to the home router 10B changes to a state parallel to the ground and requires only the polarization horizontal to the ground, the said. Communication with the home router 10B becomes difficult. That is, as the antenna configuration of the home router 10B, which is expected to change the posture of the wireless slave unit as the communication partner to various states, only the vertical polarization as shown in FIG. 8B is good for communication. It is hard to say that the antenna 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 planes of XZ, YZ, and XY for expressing the antenna radiation pattern of the half-wavelength dipole antenna 4 and the half-wavelength dipole antenna 4. The conceptual diagram of the positional relationship between the three planes of XZ, YZ, and XY shown in FIGS. 9A and 9B and the half-wavelength dipole antenna 4 is a general diagram usually used when expressing an antenna radiation pattern. It is an expression method. With reference to the conceptual diagram of FIG. 9, the electric field strengths of orthogonal polarization and parallel polarization orthogonal to each of the three planes of XZ, YZ, and XY can be drawn as a characteristic curve, which will be described below. Like 10, the antenna emission pattern can be expressed.

FIG. 10 is a pattern diagram showing the 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 a positional relationship as shown in the schematic diagram of FIG. 9B. The antenna radiation pattern on each of the XZ plane, the YZ plane, and the XY plane is shown. In FIG. 10, the characteristic curve of the horizontal polarization of the antenna radiation pattern is shown by a thick line, and the characteristic curve of the vertical polarization is shown by a thin line. As shown in the pattern diagram of FIG. 10, in the XZ plane and the YZ plane, although parallel polarization or vertical polarization exists in each plane, there is no polarization or horizontal polarization orthogonal to each plane. You can see that. Further, it can be seen that even in the XY plane, the polarization orthogonal to the XY plane, that is, the vertical polarization exists, but the polarization parallel to the XY plane, that is, the horizontal polarization does not exist at all. Therefore, it cannot be said that the antenna of the half-wavelength dipole antenna 4 as shown in FIG. 8 can output the polarization of radio waves evenly in all directions and perform communication in any direction. It is a composition.

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

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

(1) The antenna according to the present invention is
A half-wave dipole antenna formed by arranging elements of half-wave length at vertically symmetrical positions at an arbitrary frequency specified in advance,
A Z-shaped half-wavelength Z-shaped non-contact element with a half-wavelength length,
Have,
The half-wavelength Z-shaped non-contact element is placed 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,
The half-wavelength Z-shaped non-contact element is arranged in a state of extending in a direction orthogonal to the half-wavelength dipole antenna.
It is characterized by that.

(2) The wireless communication device according to the present invention is
It is equipped with a half-wavelength dipole antenna formed by arranging elements of half-wavelength length at vertically symmetrical positions at an arbitrary frequency specified in advance.
A board equipped with a wireless IC (Integrated Circuit) connected to the feeding point of the half-wave dipole antenna, and
A Z-shaped half-wavelength Z-shaped non-contact element with a half-wavelength length,
Have,
The half-wavelength Z-shaped non-contact element is placed 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,
The half-wavelength Z-shaped non-contact element is arranged in a state of extending in a direction orthogonal to the half-wavelength dipole antenna.
It is characterized by that.

(3) The antenna forming method according to the present invention is
A half-wave dipole antenna formed by arranging elements of half-wave length at vertically symmetrical positions at an arbitrary frequency specified in advance,
A Z-shaped half-wavelength Z-shaped non-contact element with a half-wavelength length,
Are placed in a position where they are spatially connected in a non-contact state with each other.
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,
The half-wavelength Z-shaped non-contact element is arranged in a state of extending in a direction orthogonal to the half-wavelength dipole antenna.
It is characterized by that.

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

That is, in the present invention, the half-wavelength Z-shaped non-contact elements arranged so as to extend in a direction orthogonal to the half-wavelength dipole antenna are placed so as to be closest to each other at the center of the half-wavelength dipole antenna. Since it is possible to spatially couple to the antenna structure, it is possible to improve the polarization characteristics of radio waves, which are indispensable for improving wireless communication performance as an antenna structure, and it is also possible to realize it inexpensively and simply. It has become.

It is a schematic diagram which shows an example of the antenna configuration of the antenna which concerns on this invention. It is a schematic diagram which shows an example of the antenna configuration of the home router using the antenna shown in FIG. 1 as an example of this invention. It is a pattern diagram which shows an example of the antenna radiation pattern of the antenna of the home router shown in FIG. As an example of the present invention, it is a schematic diagram showing an example of an antenna configuration different from FIG. 2 of a home router using the antenna shown in FIG. 1. It is a schematic diagram which shows the example different from FIG. 1 of the antenna composition of the antenna which concerns on this invention. It is a pattern diagram which shows an example of the antenna radiation pattern in the case where the antenna of FIG. 5 is mounted instead of the antenna of FIG. 1 as the antenna of the home router shown in FIG. It is an image diagram which shows the coincidence state and the disagreement state of the polarization of the radio wave in two general dipole antennas. It is a schematic diagram which shows the antenna composition of the general home router using the dipole antenna of the present technology. It is a schematic diagram which shows the 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 of the home router shown in FIG. It is a pattern diagram which shows the antenna radiation pattern of the half-wavelength dipole antenna of the home router shown in FIG.

Hereinafter, preferred embodiments of the antenna, the wireless communication device, and the antenna forming method according to the present invention will be described with reference to the attached drawings. The antenna according to the present invention relates to a dipole antenna that emits a radio wave of an arbitrary wavelength, and the wireless communication device according to the present invention relates to a wireless communication device equipped with a dipole antenna. Further, it is needless to say that the drawing reference reference numerals attached to the following drawings are added to each element for convenience as an example for assisting understanding, and the present invention is not intended to be limited to the illustrated embodiment. stomach.

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

(Structure Example of Embodiment of this 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 shows a case where the antenna, which is an example of the present invention, is viewed from the front, and FIG. 1B shows a case where the antenna, which is an example of the present invention, is viewed from the side. As an example of the present invention, the antenna 11 shown in FIG. 1 is intended as a half-wave dipole antenna similar to the half-wave dipole antenna 4 of the home router 10B shown in FIG. 8 as the current technology.

As shown in FIGS. 1A and 1B, the antenna 11 which is an example of the present invention has a feeding point 4a provided in the center of the half-wavelength dipole antenna 4 in addition to the half-wavelength dipole antenna 4. At the position of, a non-feeding element having a half-wavelength Z-shape in a non-contact and close proximity to the half-wave dipole antenna 4 (spatial-coupled state) is placed in a 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 supplied to the antenna 11 via a coaxial cable or a strip line, and a half-wavelength dipole in which two elements are linearly extended in a vertically symmetrical state. It is the beginning of the antenna 4. Further, the target wavelength is a wavelength at an arbitrary frequency specified in advance, and the length of each half wavelength of each of the two elements constituting the half-wavelength dipole antenna 4 is also the length at an arbitrary frequency specified in advance. Is.

Further, the half-wavelength Z-shaped non-contact element 6 is composed of three parts, an upper side element, a connection part element, and a lower side element, which are formed by bending one 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 opposite to each other on a surface perpendicular to the connection element from the end to which the connection element is connected. It is formed as a Z-shaped element by arranging it in a state of being extended to the right angle. 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, in a state where the central portion where the feeding point 4a of the half-wavelength dipole antenna 4 is located and the central portion of the connecting portion element are close to each other, the connecting portion element is arranged so as to be parallel to the half-wavelength dipole antenna 4. As a result, the upper side element and the lower side element are arranged in a state orthogonal to the half-wavelength dipole antenna 4.

That is, the connection element connecting the upper element and the lower 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 element and the lower element have a positional relationship. Are arranged so as to have a positional relationship orthogonal to the half-wavelength dipole antenna 4. In other words, in the half-wavelength Z-shaped non-contact element 6, the upper side element and the lower side element extend in a direction orthogonal to the half-wavelength dipole antenna 4.

The half-wavelength Z-shaped non-contact element 6 is in contact with the half-wavelength dipole antenna 4, and the half-wavelength Z-shaped non-contact element 6 is in contact with the central portion of the half-wavelength dipole antenna 4, that is, the feeding point 4a. The central part of the is arranged so as to be closest to each other.

As described above, the central portion of the half-wavelength Z-shaped non-contact element 6 is arranged close to the central portion of the half-wavelength dipole antenna 4 to form an antenna (dipole + Z-shaped non-contact non-feeding). Although the details will be described later, it is possible to reduce the number of surfaces in which the polarization of the radio wave is not output from the antenna 11.

Next, as an example of the wireless communication device according to the present invention, a configuration example of the wireless communication device 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 device of FIG. 2 will be described by taking as an example the case of a home router similar to the home router 10B shown in FIG. 8 as the 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 view showing the antenna configuration inside 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 is a feeding point 4a of a half-wavelength dipole antenna 4 and a coaxial cable 5. It is connected via. As described above, by using the coaxial cable 5, it is possible to output from the wireless IC 3 to the feeding point 4a of the half-wavelength dipole antenna 4 while suppressing the loss of signal power. 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-wavelength 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 configuration of the antenna 11 is further provided with a half-wavelength Z-shaped non-contact element 6 (dipole + Z-shaped) with respect to the antenna configuration of FIG. 8 shown as the current technology. It is formed as a (non-contact non-feeding) antenna, more accurately, as (half-wavelength dipole antenna 4 + half-wavelength Z-shaped non-contact element 6).

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

As the current technology, in the antenna radiation pattern when only the half-wavelength dipole antenna 4 is used as in the antenna shown in FIG. 8, as shown in FIG. 10, all three planes 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 shows that the requirement for uniform communication in all directions is being realized.

(Constituent Examples of Other Embodiments 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 as an example a home router similar to the case described above in FIG. 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 antenna mounting example different from that of the home router 10 of FIG. 2, in which the antenna 11 is mounted at a place different from that on the substrate 2.

In the home router 10A of FIG. 4, the half-wavelength 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. It is supposed to be. That is, if there is a margin in the component mounting space on the board 2, if the half-wavelength dipole antenna 4 of the antenna 11 is directly mounted on the board 2, the cost can be reduced as compared with the case of FIG. can.

With the change from FIG. 2 in the mounting position of the half-wavelength dipole antenna 4, the central portion of the arrangement position of the half-wavelength Z-shaped non-contact element 6 of the antenna 11 is the central portion of the half-wavelength dipole antenna 4. It is moved from FIG. 2 to a position close to the feeding point 4a of the above, 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 substantially 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 different from FIG. 1 in the antenna configuration of the antenna according to the present invention. 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. The case where 11A is seen from the side is shown. The antenna 11A shown in FIG. 5 is in non-contact and close to the half-wavelength dipole antenna 4 at the position of the feeding point 4a provided in the central portion of the half-wavelength dipole antenna 4, as in the case of the antenna 11 of FIG. Although they are arranged in a state (spatial coupled state), the shape of the half-wavelength Z-shaped non-feeding element having a half-wavelength is different from that of the half-wavelength Z-shaped non-contact element 6 in FIG. ..

That is, the half-wavelength Z-shaped non-feeding 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 of No. 6 has a shape twisted by 90 degrees, and is formed as a half-wavelength twist Z-shaped non-contact element 6A.

That is, the half-wavelength twist 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 connecting portion element is connected as the center. The shape is twisted 90 degrees on the surface perpendicular to the part element (bent shape), and when each of the upper side element and the lower side element is extended, the positional relationship is orthogonal to each other. In other words, in the half-wavelength twist 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 direction orthogonal to each other. It is formed like this.

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. 2, and the XZ of the antenna 11A. The antenna radiation pattern on each of the plane, YZ plane, and XY plane is shown. The characteristic curve of horizontal polarization is shown by a thick line, and the characteristic curve of vertical polarization 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 any of the three planes of the XZ plane, the YZ plane, and the XY plane. In the pattern diagram shown in FIG. 10 as the current technology, when there is no vertical polarization of radio waves on any of the 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 uses a half-wavelength twist Z-shaped non-contact element 6A in which elements are arranged in directions orthogonal to each other, as compared with the case where vertical polarization does not exist on the XZ plane. , It is possible to communicate evenly in all directions. However, since the original power is distributed, the radiant power of each of the three planes, the XZ plane, the YZ plane, and the XY plane, is small.

In the case of mounting the antenna 11A including the half-wavelength dipole antenna 4 shown in FIG. 5 and the half-wavelength twist Z-shaped non-contact element 6A as the home router, the substrate is the same as in the case of the home router 10A in FIG. Of course, if there is a margin in the component mounting space on the board 2, the half-wavelength dipole antenna 4 of the antenna 11A can be directly mounted on the substrate 2.

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

That is, the Z-shaped non-contact element or the upper side element in which the upper side element and the lower side element extending in the direction orthogonal to the dipole antenna are arranged is further twisted 90 degrees and extended in the direction orthogonal to each other. By adopting a structure in which a twisted Z-shaped non-contact element is arranged, it is possible to improve the polarization characteristics of radio waves, which are indispensable for improving wireless communication performance as an antenna structure, and it is inexpensive and simple. It is also possible to realize it.

The configuration of a preferred embodiment of the present invention has been described above. However, it should be noted that such embodiments are merely exemplary of the invention and do not limit the 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 gist of the present invention.

1 Housing 2 Board 3 Wireless IC
4 Half-wavelength dipole antenna 4a Feeding point 5 Coaxial cable 5A Coaxial cable or strip line 6 Half-wavelength Z-shaped non-contact element 6A Half-wavelength twist Z-shaped non-contact element 10 Home router 10A Home router 10B Home router 11 Antenna 11A Antenna 11B Antenna 12B antenna

Claims (4)

A half-wave dipole antenna formed by arranging elements of half-wave length at vertically symmetrical positions at an arbitrary frequency specified in advance,
A non-contact element having a connection portion element, an upper side element and a lower side element extending in a direction perpendicular to the extending direction of the connection portion element, and having a length of half a wavelength.
Have,
The upper side element and the lower side element are arranged in a positional relationship so as to be orthogonal to each other, and one of the upper side element and the lower side element extends in a direction away from the half-wavelength dipole antenna.
The non-contact element is arranged at a position where it is spatially coupled to the half-wave dipole antenna in a non-contact state.
and,
The central portion of the 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.
An antenna that features that. It is equipped with a half-wavelength dipole antenna formed by arranging elements of half-wavelength length at vertically symmetrical positions at an arbitrary frequency specified in advance.
A board equipped with a wireless IC (Integrated Circuit) connected to the feeding point of the half-wave dipole antenna, and
A non-contact element having a connection portion element, an upper side element and a lower side element extending in a direction perpendicular to the extending direction of the connection portion element, and having a length of half a wavelength.
Have,
The upper side element and the lower side element are arranged in a positional relationship so as to be orthogonal to each other, and one of the upper side element and the lower side element extends in a direction away from the half-wavelength dipole antenna.
The non-contact element is arranged at a position where it is spatially coupled to the half-wave dipole antenna in a non-contact state.
and,
The central portion of the 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.
A wireless communication device characterized by that. The non-contact element is mounted on the board or mounted in a place different from the board.
The wireless communication device according to claim 2. A half-wave dipole antenna formed by arranging elements of half-wave length at vertically symmetrical positions at an arbitrary frequency specified in advance,
A non-contact element having a connection portion element, an upper side element and a lower side element extending in a direction perpendicular to the extending direction of the connection portion element, and having a length of half a wavelength.
Are placed in a position where they are spatially coupled in a non-contact state with each other, and one of the upper side element and the lower side element extends in a direction away from the half-wavelength dipole antenna.
The upper side element and the lower side element are arranged in a positional relationship so as to be orthogonal to each other.
The central portion of the 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.
An antenna forming method characterized by this.

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