JP2018056937A - Patch antenna assembly and patch antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a patch antenna assembly and a patch antenna, suitable for space-saving mounting of a plurality of patch antennas.SOLUTION: A plurality of antenna elements (102A, 102B), composed of a conductive material of a square planar shape, is formed on a substrate (104) composed of a tabular dielectric. For each antenna element, a pair of feeding points (126A, 126B) are arranged in a manner of being apart from the center of the square with a distance D1, which corresponds to 54% of the 1/2 length of one side of the square from the center, on a normal to two mutually neighboring sides from the center of the square (130A, 130B). The plurality of antenna elements (102A, 102B) are electromagnetically coupled with a circuit (116) for signal transmission/reception to/from the antenna element, through the corresponding pair of feeding points (126A, 126B).SELECTED DRAWING: Figure 3

Description

  The present invention relates generally to antennas, and more particularly to patch antenna assemblies and patch antennas.

  A conventional patch antenna has a patch-like radiation electrode, that is, a patch electrode on the top surface of a dielectric substrate having a square planar shape, as disclosed in, for example, Japanese Patent Laid-Open No. 6-24620 (Patent Document 1). A ground electrode is formed on the bottom surface, and a single power supply pin that penetrates the dielectric substrate is provided near the center of the dielectric substrate, and a one-point power supply structure that supplies power to the patch electrode via this power supply pin is generally used. Is.

  In recent wireless communication devices, for example, dual-band concurrent (independent operation) in which a plurality of wireless chips that operate simultaneously and independently in two frequency bands such as 2.4 GHz and 5 GHz frequency bands are mounted on a single substrate. ) Corresponding systems are becoming the mainstay. Also, a MIMO (Multi-Input Multi-Output) antenna that communicates by using multiple antennas, transmitting different data from each antenna, and receiving data simultaneously with multiple antennas, and Available areas are increasing.

  In a conventional MIMO antenna, for example, as known in the PALNEX broadband router BLW-HPMM-U (Non-Patent Document 1), three monopole antennas are used to transmit and receive three channels, that is, 3 × 3. Some have realized communication.

Japanese Patent Laid-Open No. 6-24620 JP 2006-279202 A

PALNEX broadband router BLW-HPMM-U <https://www.planex.co.jp/product/router/blw-hpmm-u.shtml>

  For example, if a 4 × 4 MIMO antenna is to be realized with the conventional patch antenna of the above-described one-point feeding method, four antennas are required. For example, if a 2.4-GHz band and a 5-GHz band antenna are to be operated in a dual-band concurrent manner, a total of eight patch antennas are required, which requires a large space.

  The patch antenna is disposed, for example, in a street manhole or indoor ceiling, and is often used for WiFi (trademark) communication based on IEEE (American Institute of Electrical and Electronics Engineers) standard 802.11 with a mobile terminal. In order to apply MIMO antennas and multi-band simultaneous operation antennas to such mobile communications advantageously at low cost and in a space-saving manner, electromagnetic signal separation, that is, isolation between multiple transmitting / receiving antennas can be secured stably. It becomes a problem to do.

  In general, isolation between antennas is ensured if they are separated by a distance equal to or more than half the wavelength transmitted and received by the antennas. However, if an attempt is made to construct a multi-element antenna such as a MIMO antenna or a multi-band simultaneous operation antenna while ensuring such isolation, the overall size of the device increases, making it unsuitable for mobile communication applications.

  An object of the present invention is to provide a patch antenna assembly and a patch antenna suitable for space-saving mounting of a plurality of patch antennas.

  According to the present invention, a plurality of antenna elements made of a conductive material having a substantially square planar shape are formed on a support made of a plate-like dielectric, and each antenna element has two sides adjacent from the center of the square. A pair of feed points are separated from the center of the square by a distance substantially equivalent to 54% of the length corresponding to half of the length of one side of the square on the substantial normal to Each of the plurality of antenna elements is electromagnetically coupled to a circuit that transmits and receives signals to the antenna elements via a corresponding pair of feed points.

  According to one aspect of the present invention, the following patch antenna assembly is provided. That is, the patch antenna assembly includes a first antenna element having a substantially square planar shape whose one side is a first length and made of a conductive material, and a length of one side. Has a substantially square planar shape having a second length different from the first length and made of a conductive material, and the first and second antennas on one main surface A first circuit that supports the element and is made of a plate-like dielectric; a first circuit that is spaced apart from the support by a predetermined distance and that transmits and receives signals to and from the first antenna element; and And a circuit board on which a second circuit for transmitting and receiving signals to and from the antenna element is mounted as a circuit pattern. The first antenna element, the support body, and the circuit board include the first antenna element and the support body. And a first through hole penetrating the circuit board. A pair of feeding points is formed, and the second antenna element, the support and the circuit board have a second pair of feeding points as a second through hole penetrating the second antenna element, the support and the circuit board. And each of the first pair of feed points is substantially on a normal line from the center of the square of the first antenna element to two adjacent sides of the square, and is on the normal line from the center. The second pair of feed points are spaced apart from the center by a first distance substantially corresponding to 54% of the length corresponding to half the length of one side of the square. The center of the square is substantially normal to the two adjacent sides of the square, and has a length corresponding to half the length of one side of the square from the center on the normal. Spaced apart from the center by a first distance corresponding to 54%, The na element is electromagnetically coupled to the circuit pattern via the first pair of feed points, and the second antenna element is electromagnetically coupled to the circuit pattern via the second pair of feed points. .

  According to one aspect of the present invention, the following patch antenna is provided. That is, this patch antenna has an antenna element made of a conductive material having a substantially square planar shape, and a support made of a flat plate-like dielectric material carrying the antenna element on one main surface, And a circuit board on which a circuit for transmitting and receiving signals to and from the antenna element is mounted as a circuit pattern. The antenna element, the support body, and the circuit board include an antenna element. A pair of feed points are formed as through holes penetrating the support and the circuit board, and each of the pair of feed points is substantially on a normal line from the center of the square to two adjacent sides of the square. On the normal line, the antenna element is spaced apart from the center by a distance corresponding to substantially 54% of the length corresponding to 1/2 of the length of one side of the square from the center. Power supply It is electromagnetically coupled to the circuit pattern through.

  The inventive concept disclosed in the present application may be defined in a manner other than that described in the claims below. The inventive concept may consist of several separate inventions, especially considering the present invention in terms of explicit or implicit subtasks or benefits to be achieved. In such cases, some of the claimed attributes may be redundant in terms of separate inventive concepts. Within the framework of the basic inventive concept, the features of the various embodiments can be applied to other embodiments.

  According to the present invention, space saving is realized by assigning two feeding points to one patch antenna. Further, when saving the space as described above, high isolation is stably maintained between the patch antennas, and a good matching state is provided to reduce the return loss inside the circuit.

  As described above, according to the present invention, the feed points are arranged so that the isolation is maximized due to the multiband characteristics, and a wide bandwidth is secured by the radiation batch antenna having the double-sided structure.

1 is a schematic perspective view of a patch antenna assembly according to an embodiment of the present invention. It is a disassembled perspective view of the patch antenna assembly shown in FIG. It is a schematic front view which shows the back surface of the antenna ground plane at the time of seeing the patch antenna assembly shown in FIG. 1 from the downward direction of the figure. It is a fragmentary sectional view which expands and shows the cross section of the patch antenna assembly in the dashed-dotted line shown in FIG. It is a schematic perspective view which shows the back surface of a circuit board at the time of seeing the patch antenna assembly shown in FIG. 1 from the downward direction of the figure. It is a schematic connection diagram which shows notionally the use condition of the patch antenna assembly by the Example. It is an equivalent circuit diagram of the filter circuit connected to the patch antenna according to the same embodiment. It is a graph which shows the example of a directivity measurement in the 2.4-GHz frequency band of the patch antenna by the Example. It is a graph which shows the example of a measurement of the directivity in the 5.5-GHz frequency band of the patch antenna by the Example. It is a graph which shows the example of a measurement of the isolation characteristic in the 2.4-GHz frequency band of the patch antenna by the Example. It is a graph which shows the example of a measurement of the isolation characteristic in the 5-GHz frequency band of the patch antenna by the Example.

  Embodiments of a patch antenna assembly according to the present invention will now be described in detail with reference to the accompanying drawings. Referring to FIG. 1, a patch antenna assembly 100 according to an embodiment of the present invention has a substantially square planar shape as a whole, and is a thin and flat assembly. The assembly 100 also has a substantially square planar shape, and has an antenna ground plane 104 in which two types of patch antennas 102A and 102B are formed on the lower main surface or back surface in FIG. And a circuit board 106 having the same planar shape. The antenna ground plane 104 functions as a support that carries the patch antennas 102A and 102B.

  In this embodiment, the patch antennas 102A and 102B are formed on the back surface of the antenna base plate 104 in this way, but may instead be formed on the main surface, that is, the surface on the opposite side. In addition, in each figure, the same element is shown with the same referential mark. Further, in any of the drawings described below, only elements necessary for understanding the present invention are shown simply and conceptually, and it goes without saying that elements other than these elements are mounted on an actual apparatus. . Furthermore, the dimensions of the elements shown in the drawings are not necessarily drawn to be proportional to the actual dimensions, and specific parts and dimensions may be exaggerated so that the invention can be easily understood, particularly as shown in FIG. is there.

  As shown in FIG. 2, the antenna ground plane 104 and the circuit board 106 have screws 112 passing through circular openings 108 and 109 at their four corners through spacers 110 having a predetermined height H (FIG. 4). By being engaged with the nut 114, they are tightened to each other. Of course, the fastening means is not limited to screws and nuts, but may be other fixed means such as engagement. As a result, a gap having a predetermined interval H is formed between the patch antennas 102A and 102B and the circuit board. Therefore, when the patch antennas 102A and 102B function as antenna elements, the dielectric has a thickness H It is a layer of air having a dielectric constant of substantially 1.

  The patch antennas 102A and 102B are formed on the back surface of the ground plate 104 by a conductive pattern of a conductive material such as Cu and Au as shown in FIG. 3 when the patch antenna ground plate 104 is viewed from below in FIG. And / or an antenna element that functions as a wave receiver.

  In this embodiment, the patch antenna assembly 100 is disposed in, for example, a street manhole or indoor ceiling, and is used for WiFi communication based on IEEE (American Institute of Electrical and Electronics Engineers) standard 802.11 with a mobile terminal (not shown). Applied advantageously. In the present embodiment, one patch antenna 102A is further configured as an element for a 5.5 GHz band with a double-sided structure, and the other patch antenna 102B is configured as an element for a 2.4 GHz band with a double-sided structure. For example, a dual-band concurrent operation antenna capable of MIMO (Multi-Input Multi-Output) suitable for mobile communication is realized.

  The present invention is not limited to such WiFi communication or the specific frequency band described herein, but is also advantageously applied to other communication methods such as Bluetooth (trademark). In addition, even WiFi communication is not limited to the 2.5 GHz band and 5 GHz band, it can be applied to a frequency band different from the embodiment according to the progress of the times and / or differences in countries and regions, Needless to say.

  In this embodiment, two sets of two types of patch antennas 102A and 102B are arranged as described above. However, the present invention can be applied to three or more types of patch antennas and three or more sets of patch antennas. For example, a patch antenna (not shown) of a third frequency band is disposed on the side of the patch antenna 102B, and the present invention can be advantageously applied to enable multiband concurrent operation.

  In this embodiment, the patch antenna ground plane 104 is made of glass epoxy resin such as FR4, and constitutes a patch antenna-side dielectric. In this embodiment, the radio wave 138 (FIG. 6) is transmitted and received from the radiation surface 104A side of the patch antennas 102A and 102B through the patch antenna side dielectric 104. The circuit board 106 is also a glass epoxy resin substrate, and a circuit pattern 118 including a filter circuit 116 as shown in FIG. 5 is formed on one main surface, ie, the back surface 106A viewed from below in FIG. It is made of a conductive material. The filter circuit 116 is formed with a ground junction as shown at 120 in FIG. 5, which includes a coaxial cable from a utilization circuit for transmitting and / or receiving radio frequencies such as the radio module 122 (FIG. 6). The ground side of 124 is connected. The feed of the coaxial cable 124 is connected to the feed points 126A and 126B of the conductor pattern 118 via the filter circuit 116. A surface 106B of the circuit board 106 facing the antenna ground plane 104 constitutes a ground surface for grounding the circuit board 106 and the patch antennas 102A and 102B.

  One feeding point 126A corresponds to the patch antenna 102A, that is, is electromagnetically coupled, and the other feeding point 126B corresponds to the patch antenna 102B, that is, is electromagnetically coupled. More specifically, as shown in an enlarged view in FIG. 4, the feeding point 126A is formed on the inner hole surface of the through hole 128 that passes through the patch antenna 102A in the patch antenna ground plane 104 and the conductor pattern 118 in the corresponding circuit board 106. A conductive material such as an Ag paste is applied to achieve electromagnetic coupling between the conductive pattern 118 and the patch antenna 102A.

  In general, a linearly polarized patch antenna such as this embodiment has a length corresponding to about 1/2 wavelength on one side of a substrate having a layer structure in which a conductor pattern and a ground conductor face each other with a dielectric interposed therebetween. It is formed by arranging square conductor patterns and providing a power feeding part for resonating them. The dimension L (FIG. 4) of one side of the square conductor pattern is calculated by the following equation.

L = λ / 2 / ε ^1/2 = C / (2f) × ε ^-1/2 (1)

Where C is the speed of light in vacuum, f is the resonance frequency of the antenna element, and ε is the relative dielectric constant of the dielectric. For example, see Japanese Patent Application Laid-Open No. 2006-279202 (Patent Document 2).

  In this embodiment, since the square metal elements 102A and 102B are used as antenna elements, the feed points 126A and 126B are separated from the centers 130A and 130B of the square metal elements 102A and 102B by a predetermined distance D1 (FIG. 4). It is provided at two adjacent points. One feeding point 126A is arranged at a phase angle of 0 degrees with respect to the center 130A, and the other feeding point 126B is arranged at a position separated from this by a phase angle of 90 degrees. In other words, for example, with respect to the antenna element 102A, each of the pair of feeding points 126A is disposed substantially on the normal line from the center 130A of the square of the antenna element to two adjacent sides of the square. Similarly, for the other antenna element 102B, each of the pair of feed points 126B is disposed substantially on the normal line from the center 130B of the square of the antenna element to substantially two adjacent sides of the square. ing.

  In this embodiment, one patch antenna 102A functions as a square antenna element for the 2.4 GHz band. The length L (FIG. 4) of one side of the square shape is substantially 1 of the transmission / reception wavelength λ according to the equation (1) because the dielectric layer is air having a thickness H as described above. The length corresponding to / 2, 48.0 mm. Similarly, the other patch antenna 102B functions as a square antenna element for the 5 GHz band, and the length of one side of the square is 22.0 mm. The thickness H of the dielectric layer is 4 mm in this embodiment.

  In general, electromagnetic separation, that is, isolation between channels of transmission / reception signals is ensured by separating a distance corresponding to half of the transmission / reception wavelength λ. However, if an attempt is made to construct a multi-element antenna such as a MIMO antenna or a multi-band simultaneous operation antenna while ensuring such isolation, the overall size of the device increases, making it unsuitable for mobile communication applications.

  Accordingly, as a result of diligently conducting various experiments and researches, the inventors have taken the 2.4 GHz patch antenna 102A shown in FIG. 4 as an example, and the pair of feeding points 126A is the patch antenna as described above. Is disposed on the normal line from the center 130A of the square to the two adjacent sides of the square, that is, if one feeding point has a phase angle of 0 degrees, the other feeding point is substantially 90 degrees. In addition, each of the pair of feeding points 126A has a distance D1 from the center 130A of the patch antenna and a distance from the square center point 130A of the patch antenna 102A to one side. It has been found that when D is set to substantially 32% or more, preferably 50% or more, more preferably about 54%, good isolation can be secured. Since the length L of one side of the square shape of the antenna element is substantially the length corresponding to the half wavelength λ / 2, in this embodiment, the length L of one side of the square shape of the patch antenna 102A. Is 48.0 mm as described above, and therefore the distance D1 from the center 130A of the feeding point 126A is 13.0 mm.

  Similarly, for the 5 GHz patch antenna 102B, each of the pair of feeding points 126B is arranged at a position of substantially 90 degrees when one feeding point is set to a phase angle of 0 degrees. It is advantageous to do so. Further, each of the pair of feeding points 126B has a distance from the center 130B of the patch antenna that is substantially 32% or more of the distance from the square center point 130B (FIG. 3) of the patch antenna 102B to one side, preferably Is set to 50% or more, more preferably about 54%, good isolation can be secured. Also for the patch antenna 102B, since the length of one side substantially corresponds to the half wavelength λ / 2, in the case of the present embodiment, the length of one side of the square shape of the patch antenna 102B is as described above. Thus, the distance from the center 130B of the feeding point 126B is 5.5 mm.

  The position of the feeding points 126A and 126B, in other words, the above-mentioned distance D1 or D2 (FIG. 4) or the ratio of the distance D1 to the distance D depends on the environment of the patch antenna 102A or 102B. The environment is, for example, the material of the patch antenna ground plane 102 and the circuit board 104, the relative dielectric constant and the layer thickness of the dielectric layer between them. In this embodiment, the patch antenna ground plane 102 and the circuit board 104 may be made of glass epoxy resin, the dielectric layer is air, and the layer thickness is the height H of the spacer 110 (FIG. 4).

  In the present embodiment, two 2.4 GHz patch antennas 102A and two 5 GHz patch antennas 102B are diagonally arranged alternately on the patch antenna ground plane 04 as shown in FIG. In this embodiment, the pitch p of the arrangement, that is, the distance between the centers 130A and 130B of the patch antennas 102A and 102B is 73.0 mm in both the vertical and horizontal directions in FIG. As described above, in general, electromagnetic separation between channels of transmission / reception signals, that is, isolation is ensured if the distance corresponding to half λ / 2 of the transmission / reception wavelength λ of the antenna is separated. In the example, due to the arrangement of the feeding points 126A and 126B peculiar to the above-described embodiment, sufficient electromagnetic channel separation can be ensured even if the patch antennas 102A and 102B are arranged at the pitch p described above. And a compact patch antenna assembly 100 can be achieved.

  Power feeding to the patch antennas 102A and 102B having such a double-sided structure employs a back coaxial feeding system. In this embodiment, a coaxial line 124 (FIG. 6) and a connector 120 configured to penetrate the circuit board 106 and the through-hole 128 (FIG. 4) of the patch antenna ground plane 104 are used to radiate from the back surface of the antenna assembly 100. A configuration is adopted in which power is supplied to the elements, that is, patch antennas 102A and 102B. As described above, the impedance matching that minimizes the reflected wave is obtained by setting the feeding points 126A and 126B at appropriate positions on the radiating elements 102A and 102B.

  Referring to FIG. 7 showing an equivalent circuit of the filter circuit 116 mounted on the circuit board 106, the filter circuit 116 of the embodiment as a whole has two filters 132 (FIL1) and 134 (FIL2), an impedance adjustment circuit 136, These are connected as shown in the figure. As can be seen from FIG. 5, the filter circuit 116 having such a configuration is provided in four circuits corresponding to the four circuit patterns 118 on the circuit board 106. FIG. 7 shows one of them, but the other circuits may have the same configuration.

  A coaxial cable 124 from a utilization circuit such as the wireless module 122 (FIG. 6) is connected to the ground junction 120 formed on the circuit board 106. A filter 132 is connected to the junction 120, and the filter 132 is a general-purpose bandpass filter such as a duplexer that transmits only the frequency bands 2.4 GHz and 5 GHz of the input signal. The transmitted 2.4 GHz band signal is supplied to the feeding point 126A through the resistor R11A of the filter 134 and the resistor R13A of the impedance adjustment circuit 136, and the transmitted 5 GHz band signal is also applied to the resistor R11B of the filter 134. Then, the voltage is supplied to the feeding point 126B through the resistor R13B of the impedance adjustment circuit 136. Thus, the filter circuit 116 as a whole constitutes a band-pass filter that passes only the frequency band that resonates with the antenna elements 102A and 102B.

  In this way, only the 2.4 GHz band signal is fed to the patch antenna 102A, and only the 5 GHz band signal is fed to the patch antenna 102B. The 2.4 GHz band signal received by the patch antenna 102A is output from the feeding point 126A to the junctions 120A and 120, and the 5 GHz band signal received by the patch antenna 102B is output from the feeding point 126B. Output to 120B and 120.

  The filter circuit 116 of this embodiment also includes a junction 120A to which only a 2.4 GHz band signal is supplied and a junction 120B to which only a 5 GHz band signal is supplied. The signals in the 2.4 GHz and 5 GHz bands are supplied to the feeding points 126A and 126B through the resistors R13A and R13B of the impedance adjustment circuit 136, respectively. For the same purpose, in this embodiment, the filter 134 is disposed in the vicinity of the filter 132, and the impedance adjustment circuit 136 is disposed in the vicinity of the feeding points 126A and 126B.

  In this embodiment, the overall circuit impedance of the patch antenna assembly 100 is matched to 50 ohms, minimizing reflected waves that may occur between circuit elements. Resistors R11A to R13A, R11B to R13B, and capacitors C11A to C15A and C11B to C15B in the filter circuit 116 are provided for such impedance matching.

  Next, a characteristic example of the patch antenna according to the present embodiment will be described. Here, the directivities measured using the antenna assembly 100 configured as shown in FIG. 1 are shown in FIGS. 8A and 8B, and the isolation characteristics are shown in FIGS. 9A and 9B. Both figures show the distribution of directivity on the plane in the direction Y perpendicular to the antenna ground plane 104 for the patch antennas 102A and 102B, respectively.

  In the patch antenna assembly 100 of this embodiment, the directivity measurement value for the 2.4 GHz band patch antenna 102A shown in FIG. 8A is 2472 MHz, the maximum gain is 8.23 [dB], and the average gain is 1.63 [dB]. In addition, the directivity measurement values for the 5 GHz band patch antenna 102B shown in FIG. 8B exhibited a maximum gain of 7.23 [dB] and an average gain of 0.94 [dB] at 5500 MHz. As can be seen from FIG. 8, in both FIGS. 8A and 8B, a good directivity is shown in the direction of 0 azimuth, that is, in front of the radio wave radiation surface 104A (the direction of arrow 138 in FIG. 6), and the expected gain. was gotten.

  FIG. 9A shows a 2.4 GHz band patch antenna 102A shown in FIG. 9A, in which the horizontal axis indicates a frequency scale from 100 kHz to 8.5 GHz on a logarithmic scale, and the vertical axis indicates the transmission amount, that is, the isolation between the two feeding points 126A by −10 dB It shows from -90dB. According to the figure, it can be seen that the isolation between the two feeding points 126A was −29.1 dB at 2472 MHz (point A).

  FIG. 9B shows the 5 GHz band patch antenna 102B, the horizontal axis is the same as FIG. 9A, but the vertical axis shows the transmission amount between the two feeding points 126B from −10 dB to −45 dB. From this figure, it can be seen that the isolation between the two feeding points 126B was -20.29 dB at 5500 MHz (point B). Thus, sufficient isolation values were achieved in all cases.

  The patch antenna assembly 100 of the embodiment shown in FIG. 1 can stably obtain such sufficient isolation. Therefore, for example, a plurality of wireless chips are mounted on the board so as to support dual-band concurrent (independent operation) of 2.4 GHz and 5 GHz, and a plurality of corresponding patch antennas are configured, and different data is received from each antenna. For example, 4 × 4 MIMO or 8 × 8 MIMO can be achieved in which data is transmitted at the same time and communication is performed by simultaneously receiving data through the plurality of antennas. Thus, a space-saving patch antenna assembly is provided.

  The present invention is not limited only to the above-described embodiments. In other words, the present invention covers the scope of application even if a part or all of the above-described embodiments are arbitrarily combined or partially extracted.

  Although the invention has been described with reference to particular embodiments, it is not intended that the invention be limited to these embodiments. It should be recognized that those skilled in the art can change or modify these embodiments without departing from the scope and concept of the present invention, particularly as the technology advances in the future.

100 patch antenna assembly
102A, 102B patch antenna
104 Patch antenna ground plane
Radiation surface of 104A patch antenna
106 Circuit board
Circuit surface of 106A circuit board
106B Circuit board and patch antenna ground plane
116 Filter circuit
118 Circuit pattern
120 joints
126A, 126B Feeding point

Claims (8)

A first antenna element having a substantially square planar shape, the length of one side being the first length, and made of a conductive material;
A second antenna element having a substantially square planar shape, the length of one side being a second length different from the first length, and made of a conductive material;
A support body that carries the first and second antenna elements on one main surface and is made of a flat plate-like dielectric;
A first circuit that is spaced apart from the support by a predetermined distance and that transmits and receives signals to the first antenna element, and a second circuit that transmits and receives signals to and from the second antenna element Circuit board mounted as a circuit pattern,
The first antenna element, the support and the circuit board are formed with a first pair of feeding points as a first through hole penetrating the first antenna element, the support and the circuit board,
In the second antenna element, the support and the circuit board, a second pair of feeding points is formed as a second through hole penetrating the second antenna element, the support and the circuit board,
Each of the first pair of feed points is substantially normal from the center of the square of the first antenna element to two adjacent sides of the square, and the square of the square from the center on the normal. Spaced apart from the center by a first distance substantially corresponding to 54% of the length corresponding to one-half the length of the one side;
The second pair of feeding points is substantially on the normal line from the center of the square of the second antenna element to two adjacent sides of the square, and the first of the square from the center on the normal line. Spaced apart from the center by a first distance substantially corresponding to 54% of the length corresponding to half the length of the side;
The first antenna element is electromagnetically coupled to the circuit pattern via a first pair of feed points, and the second antenna element is electromagnetically coupled to the circuit pattern via a second pair of feed points. A patch antenna assembly, wherein the patch antenna assembly is coupled to the antenna.   2. The patch antenna assembly according to claim 1, wherein the one main surface is a main surface facing the circuit board, and transmits and receives radio waves via the first and second patch antenna element supports. A patch antenna assembly characterized by:   2. The patch antenna assembly according to claim 1, wherein the circuit board includes a filter circuit connected to the circuit pattern, and the filter circuit has only frequency bands that resonate with the first and second antenna elements, respectively. A patch antenna assembly comprising a bandpass filter for passing.   4. The patch antenna assembly according to claim 1, 2, or 3, wherein the assembly conforms to IEEE (American Institute of Electrical and Electronics Engineers) standard 802.11, the first antenna element conforms to the 2.4 GHz band, A patch antenna assembly characterized in that the antenna element is adapted to the 5 GHz band.   5. The patch antenna assembly according to claim 4, wherein the length of one side of the square of the first antenna element is 48 mm, and the length of one side of the square of the second antenna element is 22 mm, The patch antenna assembly according to claim 1, wherein the first distance is 13 mm, the second distance is 5.5 mm, and the predetermined distance is 4 mm.   4. The patch antenna assembly according to claim 3, wherein the assembly is compatible with dual-band concurrent operation.   4. The patch antenna assembly according to claim 3, wherein the assembly is adapted for multi-input / output operation. An antenna element having a substantially square planar shape and made of a conductive material;
The antenna element is supported on one main surface, and a support made of a plate-shaped dielectric material;
A circuit board that is arranged at a predetermined distance opposite to the support and on which a circuit that transmits and receives signals to and from the antenna element is mounted as a circuit pattern;
In the antenna element, the support body, and the circuit board, a pair of feeding points is formed as a through hole penetrating the antenna element, the support body and the circuit board,
Each of the pair of feeding points is substantially on a normal line from the center of the square to two adjacent sides of the square, and has a length of one side of the square from the center on the normal line. Spaced apart from the center by a distance corresponding to substantially 54% of the length corresponding to 1/2,
The patch antenna, wherein the antenna element is electromagnetically coupled to the circuit pattern via the pair of feeding points.

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