TW202245339A - Phase adjustment plate, glass plate, and wireless communication system - Google Patents

Abstract

The use of this phase adjustment plate provides a good indoor/outdoor communication environment via the emission of radio waves from an outdoor base station. The phase adjustment plate includes a base body having a first main surface and a second main surface that are opposed to each other; and a conductor pattern provided on the first main surface of the base body. The base body conveys electromagnetic waves introduced from the second main surface to the first main surface. The conductor pattern condenses the introduced electromagnetic waves at a focal point on the first main surface side or on the second main surface side.

Description

Phase adjustment plate, glass plate and wireless communication system

The invention relates to a phase adjustment plate, a glass plate and a wireless communication system.

In the 5th generation (hereinafter referred to as "5G") mobile communication standards, in addition to the sub-6 GHz frequency band called "sub-6", radio waves in the "millimeter wave band" can also be used. The millimeter wave band generally refers to the frequency band of 30 to 300 GHz, but in the 5G specification, the frequency band above the 26 GHz band is also called the "millimeter wave band". Since the millimeter wave band has not been used in general mobile communication networks so far, high-speed and large-capacity communication is expected by expanding the communication frequency band using the millimeter wave band. On the other hand, since the radio waves in the millimeter wave band have a strong directness, it is easy to cause degradation of transmission quality caused by shelters. The attenuation caused by moisture in the air is also greater. The degradation or attenuation of the transmission quality of millimeter-wave radio waves can occur outdoors or indoors, and the intrusion loss from outdoors to indoors cannot be ignored.

FIG. 1 is a diagram illustrating the attenuation of radio waves in the millimeter wave band. In general, radio waves radiated from an outdoor base station enter the room through the window WDW. The wall of the building BLD is a shield for the radio waves in the millimeter wave band, so that the radio waves cannot pass through or are greatly attenuated. The radio wave in the millimeter wave band has been attenuated when it reaches the BLD of the building, and it is further attenuated by the window glass. Since the radio wave through the window WDW keeps going straight, the area other than the line of sight (LOS; Line of Sight: line of sight) becomes a dead zone, and radio waves cannot be received. Unlike previous mobile communication systems such as 3G and 4G, it is difficult to maintain a good indoor communication environment through the radiation of radio waves from outdoor base stations. For example, Patent Document 1 describes a technology for improving radio wave permeability by providing a resin layer on window glass. [Prior Art Literature] [Patent Document]

Patent Document 1: International Publication WO2020/105670A1

[Problem to be solved by the invention]

In the 5G mobile communication system, it is considered to improve the area by installing relay equipment such as customer premises equipment (CPE: Customer Premise Equipment) and repeaters near buildings. However, there are many problems such as restrictions on outdoor construction, power supply assurance, anti-aging, waterproofing measures, and introduction into indoors. Although it is also considered to arrange relay devices such as CPE and repeaters indoors, the millimeter-wave band that originally reaches indoors is relatively weak, and it is difficult for the relay devices to receive them. Even if radio waves can be received by indoor relay equipment, it is necessary to significantly increase power consumption in order to relay indoor terminals.

The purpose of the present invention is to provide a phase adjustment plate, a glass plate and a wireless communication system that can prepare a good indoor and outdoor communication environment by the radiation of radio waves from an outdoor base station. [Technical means to solve the problem]

In an aspect of the present invention, the phase adjustment plate has: a base body having a first main surface and a second main surface facing each other; and a conductor pattern provided on the first main surface of the base body; and The substrate transmits electromagnetic waves incident from the second main surface toward the first main surface; The conductor pattern condenses the incident electromagnetic wave to a focal point on the side of the first main surface or the side of the second main surface. [Effect of Invention]

A good indoor and outdoor communication environment can be prepared by the radiation of radio waves from outdoor base stations.

Hereinafter, specific configuration examples of the embodiment will be described with reference to the drawings. In the following description, when referred to as "millimeter wave" or "millimeter wave band", it includes not only the frequency band of 30 GHz to 300 GHz, but also the quasi-millimeter wave band of 24 GHz to 30 GHz. "Electromagnetic wave" is a type of electromagnetic wave. Generally speaking, electromagnetic waves below 3 THz are called electric waves. Hereinafter, electromagnetic waves radiated from outdoor base stations or repeaters are referred to as "radio waves", and when electromagnetic waves are generally referred to, they are referred to as "electromagnetic waves". In the drawings, the same symbols are attached to the same elements in some cases, and repeated explanations are omitted.

In the embodiment, a phase adjustment plate is installed on the window glass, which is the entrance of electromagnetic wave, to gather the electromagnetic wave received by the window at one point, thereby improving the receiving environment of indoor or outdoor relay equipment and expanding the communication area. In one embodiment, by using a reflector in combination with a phase adjustment plate, the area can be more effectively expanded indoors or outdoors.

＜First Embodiment＞ Fig. 2 is a schematic diagram of the radio communication system 1 according to the first embodiment. The wireless communication system 1 includes a glass plate 100 and a repeater 50 . The glass plate 100 is used for glass windows of buildings, roofs of protective trenches of bus stops or platforms, back glass, and the like. The repeater 50 is a CPE, a repeater, etc., and receives radio waves, amplifies them, and emits them. In the example of FIG. 2, the glass plate 100 is used for the window glass of a building BLD, and the repeater 50 is arrange|positioned indoors.

The phase adjustment plate described later is used in the glass plate 100, for example, to focus radio waves radiated from an outdoor base station and incident on the glass plate 100 at a specific focal point F. By disposing the repeater 50 at or near the focal point F, the repeater 50 can receive radio waves with high energy density. The repeater 50 amplifies the received radio wave, and radiates the amplified radio wave at a specific radiation angle using an array antenna or the like. Since the energy density of the electric wave received by the repeater 50 is relatively high, there is no need to set the amplification factor of the repeater 50 too high. Since the amplified radio wave is radiated from the repeater 50 to a wide indoor area, the reception of the indoor terminal becomes easy.

FIG. 3 is a schematic diagram of a glass plate 100 using the phase adjustment plate 10 of the first embodiment. The glass plate 100 has a glass substrate 101 and a phase adjustment plate 10 . The phase adjustment plate 10 can be attached to the glass substrate 101 through the adhesive layer 102 .

The phase adjustment plate 10 has: a base body 11 having a first main surface 111 and a second main surface 112 facing each other; and a conductor pattern 12 provided on the first main surface 111 of the base body 11 . Here, the "main surface" means a surface perpendicular to the thickness direction of the base body 11 . The substrate 11 transmits electromagnetic waves incident from the second main surface 112 through the first main surface 111 .

The substrate 11 is formed of any material that is transparent to electromagnetic waves of the operating frequency of the wireless communication system 1 and can carry the conductor pattern 12 . "Transparent" means that the transmittance is 60% or more, preferably 70% or more, more preferably 80% or more, and more preferably 90% or more. As an example, a resin base material is used for the base body 11 . As the resin material satisfying the above conditions, acrylic resins such as polymethyl methacrylate, cycloolefin resins, polycarbonate resins, and the like can be used.

As will be described later, in the conductor pattern 12, the first pattern is repeatedly arranged to form a second pattern larger than the first pattern. The frequency can be selected by generating a periodic structure by repetition of the first pattern. The second pattern focuses electromagnetic waves of a specific frequency determined by the repetition period of the first pattern to a specific focus. From the viewpoint of being applied to the glass plate 100, it is desirable that the conductive pattern 12 is made of transparent conductive materials such as zinc oxide (ZnO), tin oxide (SnO2), tin-doped indium oxide (ITO), indium oxide, tin oxide (IZO), etc. However, depending on the target of application, it can also be formed of metal thin films such as copper, nickel, and gold.

The glass substrate 101 can be generally available glass, such as soda-lime glass, alkali-free glass, Pyrex (registered trademark) glass, quartz glass, etc. can be used. The bonding layer 102 is transparent to electromagnetic waves of the operating frequency of the wireless communication system 1 and is formed of any bonding material that can bond the glass substrate 101 and the substrate 11 of the phase adjustment plate 10 . The "transparent" of the adhesive layer 102 has the same meaning as the "transparent" of the substrate 11 . When using the glass plate 100 as a window glass, the whole glass plate 100 can be transparent with respect to visible light.

The phase adjustment plate 10 can be formed as a single body, and attached to the glass substrate 101 by the adhesive layer 102 . Alternatively, after attaching the substrate 11 on the glass substrate 101 with the adhesive layer 102 , a conductive film is formed on the first main surface 111 of the substrate 11 , and the conductive pattern 12 is formed by photolithography and etching.

The conductive pattern 12 formed on the first main surface 111 of the substrate 11 forms a metasurface. "Metasurface" means an artificial surface that controls the transmission or reflection properties of incident electromagnetic waves. Optical characteristics that do not exist in nature can also be realized by controlling at least one of the phase and the amplitude of electromagnetic waves incident on the conductor pattern. With the conductive pattern 12, incident electromagnetic waves can be transmitted, reflected, or focused in a desired direction.

FIG. 4 is a diagram illustrating the principle of operation of the radio communication system 1 . A glass plate 100 is embedded in the wall 110 . Let the height direction of the wall 110 be the Z direction, let the direction from the wall 110 toward the indoor IN be the Y direction, and let the direction perpendicular to the Z direction and the Y direction be the X direction. The glass plate 100 is arranged such that the conductive pattern 12 faces the indoor IN.

Radio waves radiated from the base station BS outdoor OUT enter the glass plate 100 . The radio waves radiated from the base station BS may attenuate considerably when they reach the glass plate 100 . The incident radio wave passes through the glass plate 100 , passes through the conductor pattern 12 on the first main surface 111 , and forms a focal point F at a distance d from the first main surface 111 . By disposing the repeater 50 such as CPE near the focal point F, the repeater 50 can receive radio waves that are focused and have a high energy density.

FIG. 5A shows the light-concentrating pattern 13 included in the conductor pattern 12 . The condensing pattern 13 is an example of the second pattern forming the conductor pattern 12 . FIG. 5B shows the unit cell pattern 14 included in the light-concentrating pattern 13 . The unit cell pattern 14 is an example of the first pattern forming the conductor pattern 12 . The light-condensing pattern 13 is formed by repeatedly arranging the unit cell patterns 14 in the same direction. In this example, the unit cell pattern 14 is a cross pattern formed of an integral metal film, but it is not limited to this example. The size Lunit×Lunit of the unit cell pattern 14 is 3.5 mm×3.5 mm, and the repetition period of the center C2 is 3.5 mm.

The size Lunit of the unit cell pattern 14 is determined according to the target frequency. A periodic structure is generated by repeating the unit cell pattern 14, and functions as a resonator for resonating electromagnetic waves of a target frequency.

The light-concentrating pattern 13 in FIG. 5A is a Fresnel lens pattern formed by concentric circles 131 - 1 - 131 - n around the center C1 . The farther away from the center C1 , the thinner the line width of the concentric circle 131 is, and the narrower the space between the concentric circle 131 and the adjacent concentric circle 131 is. Whether or not the unit cell pattern 14 is disposed near the boundary of each concentric circle 131 is determined by whether or not the center C2 of the unit cell pattern 14 is included in the concentric circle 131 . Each of the concentric circles 131 formed by the repetition of the unit cell pattern 14 individually functions as a refracting surface to bend the optical path of the incident electromagnetic wave and focus it on a specific focal point F. In FIG. 5A , the convex lens is realized in the traveling direction of the electromagnetic wave by means of planar patterns, ie concentric circles 131 - 1 - 131 -n.

。由此決定之聚光圖案13之尺寸L1×L1大於2fλ×2fλ。2fλ為第1號同心圓之直徑。(1)式為環數較少時之近似式，於環之數量足夠多時，可基於(2)式決定r _n。於n大於2時，即，於可設計5次以上之菲涅爾輪帶時，使用(2)式則精度較高。 If the radius of the nth concentric circle 131-n is set as r _n , the focal length of the light-concentrating pattern 13 is set as f, and the wavelength of the incident electromagnetic wave is set as λ, then

. The size L1×L1 of the light-concentrating pattern 13 thus determined is greater than 2fλ×2fλ. 2fλ is the diameter of the No. 1 concentric circle. Formula (1) is an approximate formula when the number of rings is small, and r _n can be determined based on Formula (2) when the number of rings is large enough. When n is greater than 2, that is, when Fresnel tires can be designed more than 5 times, the accuracy of formula (2) is higher.

[number 1]

The electromagnetic wave of a specific frequency can be concentrated to a desired position by the repetition period of the unit cell pattern 14 and the lens effect of the light-concentrating pattern 13 . In the case of using the conductor pattern 12 shown in FIG. 5A and FIG. 5B , the distance d from the glass plate 100 to the focal point F in FIG. 4 is about 600 mm. Here, "approximately" means to allow an error of ± several millimeters due to manufacturing error, measurement error, and the like. In the following descriptions, even if "approximately" is not stated in the numerical value, it does not exclude allowable errors. By placing the repeater 50 at or near the focal point F, the area of the indoor IN can be effectively expanded.

Fig. 6 is a diagram of an experiment setup using the phase adjusting plate 10 of the first embodiment. On the phase adjustment plate 10, the conductor pattern 12 shown in FIGS. 5A and 5B is formed. A shield 115 is provided on the surface of the wall 110 holding the phase adjustment plate 10 . A horn-type antenna for transmission is arranged on port 1, and a dipole antenna is placed at the focal point F0 as a receiving antenna. Set the position where the receiving antenna is configured as port 2. The focal point F0 is located at a position 800 mm away from the lens formed by the conductor pattern 12 of the phase adjustment plate 10 . Move the receiving antenna along the straight line (measurement line) including the focal point F0 in the x direction and the y direction, and measure the receiving intensity of the radio wave while changing the transmission frequency.

FIG. 7A is the measurement result of the received power in the x direction of the installation in FIG. 6 , and FIG. 7B is the measurement result of the received power in the y direction of the installation in FIG. 6 . The horizontal axis is position, and the vertical axis is relative received power. The relative received power is normalized by the measured value when using 4 mm thick soda lime glass. FIG. 7C shows the frequency characteristics of the lens gain of the conductor pattern 12 shown in FIGS. 5A and 5B . The horizontal axis represents frequency (GHz), and the vertical axis represents lens gain. From Fig. 7A, across the frequency band from 27.2 GHz to 28.4 GHz, a sharp peak is observed at the center of the x direction.

In FIG. 7B , some expansion can be seen in the distribution of received power around 800 mm in the y direction. This means that the receiving margin in the y direction is larger, and the positioning of the receiver becomes easier. Better experimental results can also be obtained on this point. In Figure 7C, the 3 dB width is a range of about 1 GHz spanning 27.2 GHz to 28.1 GHz. It can be seen that in a wider frequency band, it can concentrate light at a distance of 800 mm from the lens. It can be seen that in a wide frequency band, light can be concentrated at a distance of 800 mm from the lens. In addition, the converging point of the arrangement in Fig. 6 is about 800 mm away from the lens, which is different from the 600 mm in the design of Fig. 4 for the following reasons. In the design, the plane wave is focused at a point of 600 mm when it is incident. On the other hand, in the experimental setup, since the wave source is located 200 mm away from the phase adjustment plate 10, and the spherical wave is incident on the conductor pattern 12, the focus distance is different from the design.

＜Second Embodiment＞ Fig. 8 is a schematic diagram of a wireless communication system 2 according to the second embodiment. The wireless communication system 2 includes a glass plate 200, repeaters 50-1, and 50-2. As will be described later, the phase adjustment plate used for the glass plate 200 includes a detachable dielectric plate. Depending on the presence or absence of the dielectric plate, the focal position is switched between the first focal point F1 and the second focal point F2 as shown by the double-direction arrow SW.

When the first focal point F1 is selected, the radio wave is received and relayed by the repeater 50-1 arranged at or near the first focal point F1. When the second focal point F2 is selected, the radio wave is received and relayed by the repeater 50-2 arranged at or near the second focal point F2. It is not necessary to use both of the repeaters 50-1 and 50-2, and the repeater 50 installed at one selected focus position may be used fixedly. In the radio communication system 2 of the second embodiment, the degree of freedom in system design is improved.

9A and 9B are schematic diagrams of a glass plate 200 using the phase adjustment plate 20 of the second embodiment. FIG. 9A shows the state where the dielectric board 25 is mounted. FIG. 9B shows a state where the dielectric plate 25 is removed.

The glass plate 200 has a glass substrate 201 and a phase adjustment plate 20 . The phase adjustment plate 20 can be attached to the glass substrate 201 through the adhesive layer 202 . The phase adjustment plate 20 includes a substrate 21 having a first main surface 211 and a second main surface 212 facing each other, a conductor pattern 22 disposed on the first main surface 211 of the substrate 21 , and a detachable dielectric plate 25 .

As shown in FIG. 9A , when the dielectric plate 25 is installed on the phase adjustment plate 20 , the electromagnetic waves incident on the phase adjustment plate 20 from the glass substrate 201 are focused to an arbitrary focus, such as the first focal point F1 . As shown in FIG. 9B , when the dielectric plate 25 is removed from the phase adjustment plate 20 , the incident electromagnetic wave is focused to another focal point, such as the second focal point F2 .

The configurations of the glass substrate 201, the adhesive layer 202, and the substrate 21 of the phase adjustment plate 20 are the same as those of the first embodiment, and repeated descriptions are omitted. The conductor pattern 22 has a pattern for switching focus according to the presence or absence of the dielectric plate 25 . The dielectric plate 25 has a certain degree of difference in specific permittivity from air, and is transparent to electromagnetic waves of a target frequency. "Transparent" means that the above-mentioned transmittance is 60% or more, preferably 70% or more, more preferably 80% or more, and more preferably 90% or more. The difference between the specific permittivity of the dielectric plate 25 and air is greater than 3.0, preferably greater than 4.0, more preferably greater than 5.0. Optical glass, optical plastic, and laminates thereof satisfying this condition can be used as the dielectric plate 25 .

FIG. 10A shows the operation of the wireless communication system 2 when the dielectric board 25 is installed. FIG. 10B shows the operation of the wireless communication system 2 when the dielectric board 25 is removed. The coordinate system of FIG. 10A and FIG. 10B is the same as that of FIG. 4 . A glass plate 200 is embedded in the wall 110 . Through the wall 110, there is a base station BS at the outdoor OUT, and a repeater 50-1 or 50-2 such as a CPE is arranged at the indoor IN. The glass plate 200 is arranged such that the conductive pattern 22 and the dielectric plate 25 face the indoor IN, for example.

In FIG. 10A , when the dielectric plate 25 is installed, the radio waves incident on the glass plate 200 from the outdoor OUT are focused to the first focal point F1. The first focal point F1 is located at a distance d1 from the glass plate 200 . By arranging the repeater 50-1 at or near the first focal point F1, the repeater 50-1 can receive and relay radio waves focused and having a high energy density.

In FIG. 10B , if the dielectric plate 25 is removed, the radio waves incident on the glass plate 200 from the outdoor OUT are focused to the second focal point F2. The second focal point F2 is located at a distance d2 from the glass plate 200 . There is a distance S between the first focal point F1 and the second focal point F2 in the X direction. By arranging the repeater 50-2 at or near the second focal point F2, the repeater 50-2 can receive and relay radio waves focused and having a high energy density.

The distance d1 from the glass plate 200 to the first focal point F1 and the distance d2 to the second focal point may be the same or different. When d1 and d2 are the same, the first focal point F1 and the second focal point F2 are located on the same plane parallel to the wall 110 . The positions in the height direction of the first focus F1 and the second focus F2 , that is, in the Z direction, may be the same or different. The positions of the first focal point F1 and the second focal point F2 are controlled by the conductor pattern 22 of the phase adjustment plate 20 .

FIG. 11A shows the light-concentrating pattern 23 included in the conductor pattern 22 . The condensing pattern 23 is an example of the first pattern forming the conductor pattern 22 . The condensing pattern 23 includes a first condensing pattern 23-1, a second condensing pattern 23-2, and an intersection region 23-3 where the first condensing pattern 23-1 and the second condensing pattern 23-2 intersect.

The first condensing pattern 23-1 is an example of a first conductive pattern that determines the first focal point F1. The second condensing pattern 23-2 is an example of a second conductive pattern that determines the second focal point F2. The first condensing pattern 23-1 and the second condensing pattern 23-2 are repeated to form different unit cell patterns. The intersecting region 23-3 of the first condensing pattern 23-1 and the second condensing pattern 23-2 is formed of an integral film of metal.

FIG. 11B is a schematic diagram of the unit cell pattern 24-1 forming the first condensing pattern 23-1, and FIG. 11C shows an example of the unit cell pattern 24-2 forming the second condensing pattern 23-2. The unit cell pattern 24-1 is a cross pattern formed of an integral metal film. The size Lunit×Lunit of the unit cell pattern 24-1 is 3.0 mm×3.0 mm. The period of repetition of the unit cell pattern 24-1 was 3.0 mm.

The unit cell pattern 24-2 is formed of a metal bulk film. In this example, the unit cell pattern 24-2 is a reverse pattern of the unit cell pattern 24-1, but it is not limited to this example. The size Lunit×Lunit of the unit cell pattern 24-2 is 3.0 mm×3.0 mm.

The unit cell pattern 24-1 is repeated at a period of 3.0 mm to form the first light-concentrating pattern 23-1. The unit cell pattern 24-2 is repeated at a period of 3.0 mm to form a second light-concentrating pattern 23-2. Near the boundary of the concentric circles, whether or not the unit cell patterns 24 can be arranged depends on whether the center of the unit cell patterns 24 is included in the concentric circles. The size L2×L2 of the light-concentrating pattern 23 determined by the unit cell patterns 24-1 and 24-2 is 800 mm×800 mm.

If the conductor pattern 22 shown in FIGS. 11A to 11C is used, in FIGS. 10A and 10B, the distance d1 to the first focal point F1 and the distance d2 to the second focal point F2 are both 600 mm, and the first focal point F1 The distance S from the second focal point F2 is 300 mm. By placing the repeater 50-1 or 50-2 at the first focal point F1 or the second focal point F2, the indoor IN area can be effectively expanded.

When the dielectric plate 25 is installed on the phase adjustment plate 20, by the dielectric constant of the dielectric plate 25, for example, the lens function of the light-condensing pattern 23-1 is found predominantly, and the light-condensing pattern 23-2 is suppressed. Function. When the dielectric plate 25 is removed, the dielectric constant of the air predominantly finds the lens function of the light-concentrating pattern 23-2 and suppresses the function of the light-concentrating pattern 23-1. Therefore, by attaching and detaching the dielectric plate 25 to the glass plate 200, the first focal point F1 and the second focal point F2 are switched.

＜Third Embodiment＞ Fig. 12 is a schematic diagram of a wireless communication system 3 according to the third embodiment. The wireless communication system 3 includes a glass plate 300, repeaters 50-1, and 50-2. In the third embodiment, the movable plate 35 is used as a part of the phase adjustment plate, and the position or distance of the movable plate 35 relative to the first main surface or the conductor pattern is changed, thereby switching the first focal point as shown by the double-directed arrow SW F1 and 2nd focus F2.

When the movable plate 35 is set at the first position and the first focal point F1 is selected, the radio wave is received and relayed by the relay unit 50-1 disposed at or near the first focal point F1. When the movable plate 35 is set at the second position different from the first position and the second focal point F2 is selected, the radio wave is received and relayed by the relay unit 50-2 disposed at or near the second focal point F2. It is not necessary to use both of the repeaters 50-1 and 50-1, the movable plate 35 can be fixed at a specific position, and the selected focal point can be fixedly used. In the wireless communication system 3 of the second embodiment, only the position of the movable plate 35 can be changed to select the focus position, and the degree of freedom in system design is improved.

13A and 13B are schematic diagrams of a glass plate 300 using the phase adjustment plate 30 of the third embodiment. FIG. 13A shows a state where the movable plate 35 is brought close to the conductor pattern 32 , and FIG. 13B shows a state where the movable plate 35 is separated from the conductor pattern 32 .

The glass plate 300 has a glass substrate 301 and a phase adjustment plate 30 . The phase adjustment plate 30 can be attached to the glass substrate 301 through the adhesive layer 302 . The phase adjustment plate 30 includes a base 31 having a first main surface 311 and a second main surface 312 facing each other, a conductor pattern 32 provided on the first main surface 311 of the base 31 , and a movable plate 35 .

As shown in FIG. 13A , when the movable plate 35 is close to the conductor pattern 32 , the electromagnetic wave incident from the glass substrate 301 to the phase adjustment plate 30 is focused to an arbitrary focus, such as the first focus F1 . As shown in FIG. 13B , when the movable plate 35 is separated from the conductor pattern 32 , the incident electromagnetic wave is focused to another focal point, such as the second focal point F2 . The moving distance of the movable plate 35 is, for example, several millimeters to several centimeters. The movable plate 35 can be moved manually or mechanically by an actuator or the like.

The configurations of the glass base 301 , the adhesive layer 302 , and the base 31 of the phase adjustment plate 30 are the same as those of the first embodiment and the second embodiment, and repeated descriptions are omitted. The conductor pattern 32 has a pattern that switches the focus according to the position of the movable plate 35 relative to the conductor pattern 32 . According to the position of the movable plate 35, the average dielectric constant of incident electromagnetic wave perception changes. Like the dielectric plate 25 of the second embodiment, the movable plate 35 is transparent to radio waves of a target frequency and has a specific dielectric constant. As the movable plate 35, optical glass, optical plastic, and laminates thereof satisfying the above conditions can be used.

FIG. 14 is a model diagram considering the influence of the specific permittivity of the movable plate 35 and the base body 31. A conductor pattern 32 forming a metasurface is formed on the substrate 31 . It can be considered that the capacitive component of this system is Csub in which the specific permittivity of the base body 31 on which the conductor pattern 32 is formed is dominant, and the specific permittivity of the air and the movable plate 35 is dominant, and is changed according to the position of the movable plate 35. Variable capacity Cmov parallel connector. The resonance frequency f1 when the movable plate 35 is provided is expressed by the formula ( ₃ ).

[number 2]

The resonance frequency f ₀ when the movable plate 35 is not provided is expressed by equation (4).

[number 3]

Therefore, the larger Cmov is relative to Csub, the better the controllability should be. Since the capacitance component is proportional to the dielectric constant of each, when it is desired to increase the sensitivity of the position of the movable plate 35 and to design a large change in the resonance frequency, it is only necessary to reduce the dielectric constant of the base 31 and increase the movable plate. A dielectric constant of 35 is enough. The difference in dielectric constant between the movable plate 35 and the base body 31 is preferably 1.0 or more, and more preferably 1.2 or more.

FIG. 15 shows the operation of the wireless communication system 3 when the position of the movable plate 35 relative to the conductor pattern 32 is changed. The coordinate system of FIG. 12 is the same as that of FIG. 4 . A glass plate 300 is embedded in the wall 110 . Through the wall 110, there is a base station BS at the outdoor OUT, and a repeater 50-1 or 50-2 such as a CPE is installed at the indoor IN. The glass plate 300 is arranged so that the conductive pattern 32 faces the room IN, and the movable plate 35 is located in the room IN.

When the movable plate 35 moves in a direction perpendicular to the conductor pattern 32 , the radio waves incident from the outdoor OUT are focused on the first focal point F1 or the second focal point F2 according to the position of the movable plate 35 . When the first focal point F1 and the second focal point F2 are located on the same plane parallel to the glass plate 300 , the distance d from the conductive pattern of the glass plate 300 to the focal point is, for example, 300 mm. The distance S between the first focal point F1 and the second focal point F2 is 250 mm. By disposing the repeater 50-1 at or near the first focal point F1, or disposing the repeater 50-2 at or near the second focal point F2, it is possible to receive and relay radio waves having a high energy density.

FIG. 16A shows the light-concentrating pattern 33 included in the conductor pattern 32 . The condensing pattern 33 is an example of the first pattern forming the conductor pattern 32 . The condensing pattern 33 includes a first condensing pattern 33-1, a second condensing pattern 33-2, and an intersection region 33-3 where the first condensing pattern 33-1 and the second condensing pattern 33-2 intersect.

The first condensing pattern 33-1 is an example of a first conductive pattern that determines the first focal point F1. The second condensing pattern 33-2 is an example of a second conductive pattern that determines the second focal point F2. The first condensing pattern 33-1 and the second condensing pattern 33-2 are repeated to form different unit cell patterns. The intersection region 33-3 of the first light-condensing pattern 33-1 and the second light-condensing pattern 33-2 is an integral film of metal.

FIG. 16B is a schematic diagram of the unit cell pattern 34-1 forming the first condensing pattern 33-1, and FIG. 16C shows an example of the unit cell pattern 34-2 forming the second condensing pattern 33-2. The unit cell pattern 34-1 is a cross pattern formed of an integral metal film. The size Lunit×Lunit of the unit cell pattern 34-1 is 3.1 mm×3.1 mm. The period of repetition of the unit cell pattern 34-1 was 3.1 mm.

The unit cell pattern 34-2 is formed of an integral metal film, and in this example, is a reverse pattern of the unit cell pattern 34-1, but is not limited to this example. The size Lunit×Lunit of the unit cell pattern 34-2 is 3.1 mm×3.1 mm.

The unit cell pattern 34-1 is repeated at a period of 3.1 mm to form the first light-concentrating pattern 33-1. The unit cell pattern 34-2 is repeated at a period of 3.1 mm to form a second light-concentrating pattern 33-2. Near the boundary of the concentric circles, whether the center of the unit cell pattern 34 is included in the concentric circle determines whether or not to place the unit cell pattern 24 . The size L3×L3 of the light-concentrating pattern 33 determined by the unit cell patterns 34-1 and 34-2 is 500 mm×500 mm.

When the movable plate 35 is close to the conductive pattern 32, the dielectric constant of the movable plate 35, for example, predominantly discovers the lens function of the light-condensing pattern 33-1, thereby inhibiting the function of the light-condensing pattern 33-2. When the movable plate 35 is separated from the conductor pattern 32, the dielectric constant of the air predominantly discovers the lens function of the light-condensing pattern 33-2, and inhibits the function of the light-condensing pattern 33-1. By changing the position of the movable plate 35 relative to the conductive pattern 32 in the glass plate 300, the first focal point fF and the second focal point F2 are switched.

Also in the configuration of the third embodiment, by placing the repeater 50-1 or 50-2 at the first focal point F1 or the second focal point F2, it is possible to effectively expand the area in the indoor IN.

＜Fourth Embodiment＞ In the fourth embodiment, by changing the attachment and detachment of the movable plate, the single focal point and multiple focal points can be switched. FIG. 17A shows the state of a single focus using the phase adjustment plate 40 in the wireless communication system 4. As shown in FIG. FIG. 17B shows the state of two focal points using the phase adjustment plate 40 in the wireless communication system 4 . The phase adjustment plate 40 includes a substrate 41 on which a conductive pattern 42 is formed, and a movable plate 45 . The phase adjustment plate 40 can also be fixed on the glass substrate 401 and used as the glass plate 400 . The conductor pattern 42 provided on the substrate 41 is designed to switch between the detection of a single focus and the detection of multiple focuses according to the change of the dielectric constant of the radio wave propagation medium. The basic shape of the conductor pattern 42 may be similar to that of the conductor pattern 32 of the third embodiment. Depending on the presence or absence of the movable plate 45, switching between single focus and multiple focus is performed. In particular, multiple focal points are realized by setting the position of the movable plate 45 to an "intermediate state" in which it does not contact the conductor pattern 42 .

In Fig. 17A, the movable plate 45 is removed. As a radio wave propagation medium, the permittivity of air is dominant, and a focal point F1 is formed at a position separated by a certain distance in the normal direction from the lens formed by the conductor pattern 42 . In the single focus mode, the repeater 50-1 can also be arranged at the focus F1.

In FIG. 17B , by using the movable plate 45 , the lens formed on the conductor pattern 42 is separated from the normal direction by a certain distance to form the focal point F2 and the focal point F3 . By using the movable plate 45, the dielectric constant of the radio wave propagation medium is changed, and the discovery state of the lens function of the conductor pattern 42 is changed, forming two focal points F2 and F3. For 2 focal points, repeaters 50-2 and 50-3 can be arranged at the positions of the focal points F2 and F3, respectively.

FIG. 18A is an experimental setup diagram of a single focal point with the movable plate 45 removed, and FIG. 18B is an experimental setup diagram of a dual focus point using the movable plate 45. In FIGS. 18A and 18B , a shield 115 is provided on the surface of the wall 110 holding the phase adjustment plate 40 . Configure a horn antenna for transmission on port 1. Configure a dipole antenna on port 2 as the receiving antenna. Move the receiving antenna along the measurement line shown by the dotted line in the x direction and y direction to measure the received power of the radio wave.

Fig. 19 shows the received power in the x direction of the receiving antenna. The horizontal axis is the position in the x direction, and the vertical axis is the relative received power. The relative received power is normalized by the measured value when using 4 mm thick soda lime glass. The position in the y direction is fixed at a position of 300 mm from the lens formed by the conductor pattern 42 .

In the intermediate state where the movable plate 45 was separated from the conductor pattern 42 and used, peaks of received power at the same level were observed at the position of 75 mm and the position of 410 mm in the x direction. Here, when a plurality of peaks are observed, the one located within 3 dB from the relative received power of the largest peak is called "focus". In FIG. 19 , it can be seen that the two peak positions of the same level of received power form the focal point F2 and the focal point F3 .

On the other hand, in the state where the movable plate 45 was removed, a sharp peak (first peak) was observed at a position of 410 mm in the x direction. This peak is 4 dB higher than the peak of the intermediate state in the same x position. At the position of 80 mm in the x direction, there is a lower and wider peak (the second peak), but because the relative received power of the second peak is 6 dB lower than the peak power of the intermediate state in the same location, and lower than The first peak at 410 mm is 10 dB, so it cannot be evaluated as "focus". It can be seen that a focal point F1 is formed by removing the movable plate 45 .

FIG. 20A is a graph showing the relative received power distribution in the y direction when the movable plate 45 is removed, and FIG. 20B is a graph showing the relative received power distribution in the y direction in the intermediate state. In FIG. 20A and FIG. 20B , the solid line is the relative received power in the y direction when the position in the x direction is fixed at 410 mm, and the dotted line is the relative received power in the y direction when the position in the x direction is fixed at 80 mm. In FIG. 20A , near 410 mm, the reception margin in the y direction is wider, and positioning becomes easy. In FIG. 20B , at two positions of the first peak position and the second peak position, the tolerance in the y direction is wide, and the positioning in the y direction becomes easy.

The number of focal points in the intermediate state is not limited to 2 focal points. For example, the number of focal points can also be set to three or more by changing the position of the movable plate 45 in the intermediate state to the first intermediate position and the second intermediate position according to the distance from the lens. In this case, switching between single focus and triple focus, and between double focus and triple focus becomes possible. As mentioned above, the tolerance of the positioning in the y direction is wider, and the positioning in the y direction is easier, but the positioning accuracy in the y direction at the middle position can also be improved by adding a low dielectric constant layer to the movable plate 45, etc. .

<Examples of changes in unit cell patterns> 21A and 21B show variations of unit cell patterns. In the above-mentioned embodiment, the unit cell pattern is formed by the bulk film of metal, but instead of the bulk film, a grid pattern may be used. As the unit cell pattern 14 of the first embodiment, the unit cell pattern 24-1 of the second embodiment, and the unit cell pattern 34-1 of the third embodiment, the grid pattern 64-1 of FIG. 21A can be used.

In the case of using a focus-switchable conductor pattern, the unit used as the unit cell pattern 24-2 of the second embodiment, the unit cell pattern 34-2 of the third embodiment, and the conductor pattern 42 of the fourth embodiment As the unit pattern, the mesh pattern 64-2 shown in FIG. 21B can be used.

Fig. 21C shows an example of a grid. The line width W of the grid was set to 10 μm, and the grid pitch P was set to 300 μm, but the present invention is not limited to this example. The line width of the grid can be properly selected within the range of 1 μm to 20 μm. The grid pitch P is desirably set to be equal to or less than λ/15 of the frequency or wavelength λ used in the wireless communication system.

In the second embodiment to the fourth embodiment, when the grid pattern is used for the conductive pattern 22, 32, or 42, the intersection area where the first light-concentrating pattern and the second light-condensing pattern intersect can be filled with a grid . Also when the grid patterns 64 - 1 and 64 - 2 are used, the first focal point F1 and the second focal point F2 are switched according to the presence or absence of the dielectric plate 25 or the position of the movable plate 35 . In the case of the fourth embodiment, the single focal point and the multiple focal points can be switched according to the presence or absence of the movable plate 45 or the intermediate position.

＜Examples of changes in wireless communication systems＞ FIG. 22 is a schematic diagram of the wireless communication system 5 . In the wireless communication system 4, the reflector 61 is arranged indoors to further improve the indoor area.

For example, areas A1 to A4 are located in the shadow of indoor installations, making it difficult for radio waves from the repeater 50-1 or 50-2 to reach. Even if radio waves are amplified by repeater 50-1 or 50-2, it is difficult for millimeter waves to bypass installations.

The reflectors 61a to 61c are arranged at appropriate angles at the positions where the radio waves from the repeater 50-1 or 50-1 arrive, so that the radio waves are directed toward the areas A1 to A4, thereby improving the areas. The first focal point F1 and the second focal point F2 of incident electromagnetic waves can be switched by attaching and detaching the dielectric plate 25 or changing the position of the movable plate 35 as described in the second embodiment and the third embodiment. Also, as shown in the fourth embodiment, it is possible to switch between single focus and double focus by attaching and detaching the movable plate 45 or switching the intermediate position.

＜Other Variations＞ In the second embodiment and the third embodiment, two Fresnel lens patterns of the same shape are used to form the first focal point F1 and the second focal point F2 at the same distance d, that is, in a plane parallel to the glass plate. limited to this example. The first focal point F1 and the second focal point F2 can be formed at different positions in the depth direction, that is, the Y direction, or they can be formed at different positions in the height direction, that is, the Z direction, or the horizontal direction, that is, the X direction. The first focal point F1 and the second focal point F2.

As shown in FIG. 23A, the distance d2 of the second focal point F2 can be set larger than the distance d1 of the first focal point F1. For example, the conductor pattern 72A used for the phase adjustment plate 70A of the glass plate 700A is set as a lens pattern having different focal lengths in the depth direction, that is, in the Y direction. The interval between the concentric circles of the second light-condensing pattern 23-2 shown in FIG. 11A can be set to be slower than the change of the interval between the concentric circles of the first light-condensing pattern 23-1. Thereby, the focal distance of the plane Fresnel lens realized by the second light-condensing pattern 23-2 can be made longer than that of the plane Fresnel lens realized by the first light-condensing pattern 23-1.

The configuration in which the positions of the first focal point F1 and the second focal point F2 are different in the Y direction can also be applied to the third embodiment. The focus position can be switched in the Y direction by attaching, detaching, or moving the adjustment plate 75 provided on the phase adjustment plate 70A. The adjustment plate 75 may be the dielectric plate of the second embodiment, or may be the movable plate of the third or fourth embodiment.

As shown in FIG. 23B , at least one of the first focal point F1 and the second focal point F2 can be arranged outside the LOS (area sandwiched by two horizontal dotted lines) of the glass plate 700 . The distance d1 to the first focal point F1 and the distance d2 to the second focal point F2 may be the same or different.

For example, the conductor pattern 42B used in the phase adjustment plate 70B of the glass plate 700B can be set as a lens pattern whose refraction toward the outside of the LOS becomes stronger. By forming a planar lens with a plurality of annular patterns asymmetric with respect to the center instead of concentric circles, the first focal point F1 or the second focal point F2 can be formed outside or inside the LOS.

The configuration in which the positions of the first focal point F1 and the second focal point F2 are deviated from the outside of the LOS or brought closer to the inside can also be applied to the second to fourth embodiments. The focus position can be switched in the X direction by attaching, detaching, or moving the adjustment plate 75 provided on the phase adjustment plate 70B. The adjustment plate 75 may be the dielectric plate of the second embodiment, or may be the movable plate of the third or fourth embodiment.

As a conductor pattern, two light-concentrating patterns having sensitivity to electromagnetic waves of different frequencies can be formed. For example, a first light-condensing pattern that adjusts the resonance frequency of the unit cell pattern to 28 GHz, and a second light-condensing pattern that adjusts the resonance frequency of the unit cell pattern to 50 GHz are formed. Any frequency can be selected according to the presence or absence of the dielectric plate 25 or the change of the position of the movable plate 35 .

FIG. 24 shows a wireless communication system 6 as yet another modified example of the wireless communication system. In the wireless communication systems 1-5, the radio waves incident from the outdoors are focused indoors by the phase adjustment plate, and received and amplified by the indoor repeater 50 . In the wireless communication system 6 shown in FIG. 24 , a glass plate 100 with a phase adjustment plate is used to condense radio waves incident from outdoors to the outdoors, and the outdoor relay 50 receives and amplifies them.

In the wireless communication system 6 , the phase adjustment plate 10 (see FIG. 3 ) functions as an electromagnetic wave shield. The glass plate 100 is arranged such that the conductive pattern 12 faces the room. The radio waves incident on the conductive pattern 12 through the glass substrate 101 , the adhesive layer 102 , and the substrate 11 are reflected by the conductive pattern 12 and focused on the focus F outside. By arranging the repeater 50 at or near the focal point F, the radio wave that has been concentrated and has an increased energy density is received and amplified by the repeater 50, and radiated to the outside.

As the conductor pattern 12 for reflecting incident radio waves, it is only necessary to form a planar pattern of a light-condensing reflector. The structure in Fig. 24 can prevent the radio waves from intruding into the room, and effectively utilize the reflected radio waves outdoors to improve the outdoor area.

The focus switching configurations of the second to fourth embodiments can be combined with the configuration of FIG. 24 . In this case, the dielectric board or the movable board may be arranged on the indoor side. According to the presence or absence of the dielectric plate or the movable plate, or the movement of the movable plate, the incident radio wave is reflected to different focal points outdoors.

As mentioned above, although this invention was demonstrated based on the specific structural example, this invention is not limited to the said example. The unit cell pattern is not limited to a cross pattern or its reverse pattern. Since it is only necessary to repeat the arrangement to obtain a periodic structure, appropriate patterns such as a half-moon pattern, a circular pattern, and a wave pattern can also be used. When a detachable dielectric board is used, the dielectric board can be detachably attached to the glass plate with a latch or the like. When the movable plate is used, the switch can be switched between the first position close to the conductor pattern and the second position away from the conductor pattern. In the case of reflecting the incident electromagnetic wave to the outside and concentrating it, the reflector can be arranged at a better position outside. In any situation, a good indoor and outdoor communication environment can be prepared by the radio wave radiation from the outdoor base station.

This application is based on patent application No. 2020-217939 filed with the Japan Patent Office on December 25, 2020, and patent application No. 2021-094723 filed with the Japan Patent Office on June 4, 2021 basis, all contents of which are incorporated by reference.

1,2,3,4,5,6: wireless communication system 10,20,30,40,70A,70B: phase adjustment board 11,21,31,41: matrix 12, 22, 32, 42, 72A, 72B: conductor pattern 13,23,33: spotlight pattern (2nd pattern) 14: Unit unit pattern (1st pattern) 23-1, 33-1: 1st spotlight pattern (1st conductor pattern) 23-2, 33-2: 2nd spotlight pattern (2nd conductor pattern) 23-3,33-3: Intersection area 24-1, 34-1: Unit unit pattern (1st unit pattern) 24-2, 34-2: Unit unit pattern (2nd unit pattern) 25: Dielectric board 35,45: movable plate 44-1, 44-2, 64-1, 64-2: grid pattern 50,50-1,50-2,50-3: relay machine 61a, 61b, 61c: reflector 75: Adjustment plate 100, 200, 300, 400, 700A, 700B: glass plate 101, 201, 301, 401: glass substrate 102, 202, 302: the next layer 110: wall 111,211,311: the first main surface 112,212,312: the second main surface 115: shield 131-1~131-n: concentric circles A1~A4: area BLD: building BS: base station C1: Center C2: Center d, d1, d2: distance F, F0, F1, F2, F3: focus IN: Indoor L1, L2, L3: Dimensions Lunit: size OUT: outdoor P: grid spacing S: Distance SW: double direction arrow W: line width WDW: Windows

FIG. 1 is a diagram illustrating the attenuation of radio waves in the millimeter wave band. Fig. 2 is a schematic diagram of the radio communication system of the first embodiment. Fig. 3 is a schematic diagram of a glass plate using the phase adjustment plate of the first embodiment. Fig. 4 is a diagram illustrating the principle of operation of the wireless communication system of the first embodiment. Fig. 5A is a diagram showing an example of a conductor pattern provided on the phase adjustment plate of the first embodiment. FIG. 5B is a diagram showing an example of a unit cell pattern included in the conductor pattern of FIG. 5A. Fig. 6 is an experimental setup diagram using the phase adjustment plate of the first embodiment. FIG. 7A is the measurement result of the relative reception intensity in the x direction in the setup of FIG. 6 . Fig. 7B is the measurement result of the relative receiving strength in the y direction in the setting of Fig. 6 FIG. 7C is a graph showing frequency characteristics of lens gain of the conductor patterns shown in FIGS. 5A and 5B . Fig. 8 is a schematic diagram of a wireless communication system according to the second embodiment. Fig. 9A is a schematic view of a glass plate using a phase adjustment plate of the second embodiment, that is, a view showing a state in which a dielectric plate is mounted. Fig. 9B is a schematic diagram of a glass plate using the phase adjustment plate of the second embodiment, that is, a diagram showing a state where the dielectric plate is removed. Fig. 10A is a diagram showing the operation of the wireless communication system when a dielectric board is installed. Fig. 10B is a diagram showing the operation of the wireless communication system when the dielectric board is removed. Fig. 11A is a diagram showing an example of a conductor pattern provided on a phase adjustment plate according to the second embodiment. FIG. 11B is a diagram showing an example of unit cell patterns included in the first light-concentrating pattern. FIG. 11C is a diagram showing an example of a unit cell pattern included in the second light-concentrating pattern. Fig. 12 is a schematic diagram of a wireless communication system according to a third embodiment. Fig. 13A is a schematic diagram of a glass plate using the phase adjusting plate of the third embodiment, that is, a diagram showing a state where the movable plate is approached. Fig. 13B is a schematic diagram of a glass plate using the phase adjustment plate of the third embodiment, that is, a diagram showing a state where the movable plate is approached. Fig. 14 is a model diagram considering the influence of the specific permittivity of the movable plate and the substrate. Fig. 15 is a diagram illustrating focus switching due to movement of the movable plate. Fig. 16A is a diagram showing an example of a conductor pattern provided on a phase adjustment plate according to the third embodiment. FIG. 16B is a diagram showing an example of a unit cell pattern included in the first light-concentrating pattern. FIG. 16C is a diagram showing an example of a unit cell pattern included in the second light-concentrating pattern. Fig. 17A is a diagram showing the state of a single focus using the phase adjusting plate of the fourth embodiment. Fig. 17B is a diagram showing the state of two focal points using the phase adjusting plate of the fourth embodiment. Figure 18A is a diagram of the experimental setup when the movable plate is removed (single focus). Figure 18B is a diagram of an experimental setup using 2 foci of the movable plate. Fig. 19 is a graph showing the relative received power distribution in the x-direction of single focus and double focus. FIG. 20A is a graph showing the relative received power distribution in the y direction of a single focal point. FIG. 20B is a graph showing the relative received power distribution in the y direction at 2 focal points. FIG. 21A is a diagram showing a variation example of a unit cell pattern. Fig. 21B is a diagram showing a variation example of a unit cell pattern. Fig. 21C is a diagram showing an example of a grid. Fig. 22 is a schematic diagram of a radio communication system according to a fifth embodiment. Fig. 23A is a diagram showing a modified example of a phase adjustment plate. Fig. 23B is a diagram showing a variation example of a phase adjustment plate. Fig. 24 is a diagram showing a modified example of the wireless communication system.

1: Wireless communication system

12: Conductor pattern

50: Repeater

100: glass plate

110: wall

111: The first main surface

BS: base station

d: distance

F: focus

IN: Indoor

OUT: outdoor

Claims (15)

A phase adjustment board, which has: a substrate having a first major surface and a second major surface facing each other; and a conductor pattern provided on the first main surface of the base; and The substrate transmits electromagnetic waves incident from the second main surface toward the first main surface; The conductor pattern condenses the incident electromagnetic wave to a focal point on the side of the first main surface or the side of the second main surface. The phase adjustment plate according to claim 1, wherein the conductor pattern has a first pattern repeated at a specific period, and a second pattern formed by repeating the first pattern. Such as the phase adjustment plate of claim 2, wherein The above-mentioned first pattern is a pattern having a size corresponding to the wavelength of the above-mentioned electromagnetic wave; The second pattern is a circular pattern formed by repeating the first pattern. As the phase adjustment plate of claim 1, it further has: a dielectric plate detachably provided on the first main surface; and When the above-mentioned dielectric board is installed and when the above-mentioned dielectric board is removed, the position of the above-mentioned focal point is different. As the phase adjustment plate of claim 1, it further has: a movable plate whose position relative to the above conductor pattern can be changed; and The position of the focal point is different when the movable plate is located at a first position relative to the conductive pattern and when it is located at a second position different from the first position. The phase adjustment plate according to claim 4 or 5, wherein the conductor pattern includes: a first conductor pattern, which focuses the incident electromagnetic wave to a first focal point; and a second conductor pattern, which directs the electromagnetic wave to the first focal point The second focal point with different focal points focuses the light. The phase adjustment plate according to claim 6, wherein the first conductor pattern is formed by repeating a first unit pattern, and the second conductor pattern is formed by repeating a second unit pattern different from the first unit pattern. Such as the phase adjustment plate of claim item 7, wherein The said 1st unit pattern is a reverse pattern of the said 2nd unit pattern. The phase adjustment plate according to claim 6, wherein the first conductor pattern focuses the electromagnetic wave of the first frequency to the first focal point, and the second conductor pattern focuses the electromagnetic wave of the second frequency different from the first frequency to the first focal point. The above-mentioned second focal point focuses light. As the phase adjustment plate of claim 1, it further has: a movable plate, which can be attached and detached, and whose position relative to the above conductor pattern can be changed; and The single focal point and the multiple focal points are switched according to the state where the movable plate is removed and the state where the movable plate is arranged at a position separated from the first main surface by a predetermined distance. Such as the phase adjustment plate of any one of the claims 1 to 10, wherein The aforementioned substrate is a resin film. A glass pane having: The phase adjustment plate according to any one of Claims 1 to 11; and A glass substrate carrying the above-mentioned phase adjustment plate. A wireless communication system comprising: Window glass, which uses the glass plate of claim 12; and A repeater, which is arranged on the indoor or outdoor side of the above-mentioned window glass; and The conductor pattern is disposed on the indoor side, and condenses radio waves radiated from the outdoor base station and incident on the window glass to the repeater. As the wireless communication system of claim 13, it further comprises: A reflector that reflects the radio waves radiated from the above-mentioned repeater in a specific direction. The wireless communication system according to claim 13 or 14, wherein The radio waves mentioned above are radio waves in the millimeter wave band.

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