CN108879080B

CN108879080B - Flat antenna

Info

Publication number: CN108879080B
Application number: CN201810652983.5A
Authority: CN
Inventors: 邹高迪; 邹新
Original assignee: Shenzhen Merrytek Technology Co Ltd
Current assignee: Shenzhen Merrytek Technology Co Ltd
Priority date: 2018-06-22
Filing date: 2018-06-22
Publication date: 2024-03-19
Anticipated expiration: 2038-06-22
Also published as: CN108879080A

Abstract

The invention discloses a panel antenna, wherein the panel antenna comprises a reference floor, a radiation plate and a dielectric layer, wherein the radiation plate is provided with a feed point, the feed point is arranged on the radiation plate in a manner of deviating from the physical center of the radiation plate, the radiation plate is adjacently arranged on the reference floor, the dielectric layer is arranged between the reference floor and the radiation plate so as to support the radiation plate to form a position relation that the radiation plate is adjacently arranged on the reference floor, and the radiation plate and the reference floor are arranged to meet a certain size relation so as to reduce the size of the panel antenna and/or improve the gain of the panel antenna.

Description

Flat antenna

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a panel antenna.

Background

With the advancement and development of technology, besides large antennas for base stations or satellite broadcasting, various civilian antennas have been increasingly popularized, particularly flat panel antennas, and the application fields thereof have been increased, such as smart home appliances and microwave sensors used in industrial intellectualization.

As shown in fig. 1A and 1B, a conventional and common panel antenna includes a radiation source 1, a radiation slot 2 and a base reference plane 3, wherein the radiation slot 2 is located between the radiation source 1 and the base reference plane 3, more specifically, the radiation slot 2 is disposed below the radiation source 1, and the radiation source 1 corresponds to a central region of the base reference plane 3. The conventional planar antenna has a rectangular base reference surface 3, and the radiation source 1 is disposed in a rectangular shape, wherein the base reference surface 3 and the radiation source 1 are disposed opposite to each other, that is, the length direction of the radiation source 1 is correspondingly disposed in the length direction of the base reference surface 3, the width direction of the radiation source 1 is correspondingly disposed in the width direction of the base reference surface 3, and the length and width dimensions of the base reference surface 3 are respectively greater than the length and width dimensions of the radiation source 1. And the length-width dimension of the radiation source 1 is limited by the length-width dimension of the base reference surface 3. Therefore, as for the above-described positional relationship between the radiation source 1 and the base reference surface 3, the overall size of the patch antenna depends on the size of the base reference surface 3.

For existing manufacturing flat antennas, directly changing the dimensions of the base reference plane 3 affects the effect of the flat antenna, in particular the radiation gain effect. When the existing size of the base reference plane 3 is reduced, the radiation gain effect of the panel antenna is reduced, and the reduction of the radiation gain of the panel antenna due to the reduction of the size of the base reference plane 3 cannot be compensated for in other ways, which limits the development of miniaturization of the panel antenna. In addition, the radiation gain of the existing planar antenna is difficult to obtain a larger gain effect under the existing size of the basic reference plane 3, which is not beneficial to further improving the radiation gain of the planar antenna, and therefore the planar antenna cannot be used in occasions with higher requirements on the radiation gain.

For example, as shown in fig. 1A and 1B, which are illustrations of the structural dimensions of the prior art patch antenna, in which the length of the base reference plane 3 of the prior art patch antenna is set to 32mm and the width of the base reference plane 3 is set to 22mm, if the size of the prior art base reference plane 3 is intended to be reduced, the radiation gain effect of the patch antenna is reduced, and the prior art cannot compensate for the reduction in radiation gain of the patch antenna due to the reduction in size of the base reference plane 3 in other ways. The radiation source 1 forms a radiation area in response to the reference surface 3 for efficient signal transmission within the radiation area, which is now of the order of 12m in longitudinal diameter.

In addition, the existing panel antenna consumes more raw materials in the production and manufacturing process due to the larger size of the panel antenna, and accordingly the manufacturing cost is increased; and because the existing panel antenna occupies more space when the panel antenna is mounted due to its larger size, the commonality of the existing panel antenna is reduced.

Disclosure of Invention

An object of the present invention is to provide a panel antenna in which the overall size of the panel antenna can be reduced while maintaining a radiation gain, thereby achieving miniaturization of the panel antenna.

Another object of the present invention is to provide a panel antenna, in which the panel antenna can be reduced in size while maintaining a radiation gain, and raw materials for manufacturing the panel antenna are reduced, thereby reducing manufacturing costs of the panel antenna.

It is another object of the present invention to provide a patch antenna in which the radiation gain is greatly increased while maintaining the size of the original patch antenna, thereby improving the overall performance of the patch antenna.

It is another object of the present invention to provide a panel antenna, wherein the panel antenna includes a radiating plate and a reference floor, wherein the radiating plate and the reference floor are arranged to satisfy a dimensional relationship such that a gain of the panel antenna is improved.

Another object of the present invention is to provide a panel antenna, in which the radiation gain of the panel antenna is greatly improved while maintaining the size of the original panel antenna, so that the panel antenna meets the requirement of higher radiation gain.

Another object of the present invention is to provide a panel antenna, wherein the panel antenna has a larger radiation area while maintaining the original size of the panel antenna, so that the panel antenna has better performance.

In order to achieve at least one of the above objects, the present invention provides a panel antenna comprising:

a reference floor;

a radiation plate, wherein the radiation plate has a feeding point, wherein the feeding point is provided to the radiation plate offset from a physical center of the radiation plate, wherein the radiation plate is provided adjacently to the reference floor, wherein the radiation plate and the reference floor are provided so as to satisfy a projection of the radiation plate to the reference floor within the reference floor, wherein an operation wavelength of the panel antenna is set to λ, a size of the radiation plate is set in a range of less than or equal to λ/2 in a direction perpendicular to a line between the physical center of the radiation plate and the feeding point, wherein a size of the reference floor is set to trend toward the size of the radiation plate while being greater than or equal to the size of the radiation plate so that the size of the reference floor can be set in a range of less than 32mm in a direction perpendicular to a line between the physical center of the radiation plate and the feeding point, and the size of the panel antenna can be reduced in the direction; and

And a dielectric layer disposed between the reference floor and the radiation plate so as to be capable of supporting the radiation plate in a positional relationship in which the radiation plate is adjacently disposed to the reference floor.

In an embodiment, the radiation plate is arranged to: the radiating plate has a size in a range of greater than or equal to lambda/4 in at least one direction perpendicular to a line between a physical center of the radiating plate and the feeding point.

In an embodiment, a distance parameter between the feeding point and the physical center of the radiation plate is D, where a range of values of the parameter D is: lambda/64 is equal to or less than D is equal to or less than lambda/16.

In an embodiment, the thickness parameter of the dielectric layer is H, where the range of values of the parameter H is: lambda/64 is less than or equal to H and less than or equal to lambda/32.

In an embodiment, the radiation plate satisfies between the projected edge of the reference floor and the corresponding outer edge of the reference floor: a distance parameter L3 between the projected edge and the outer edge of the reference floor in the direction of the physical center of the radiation plate to the feed point satisfies L3.gtoreq.lambda/32, and a distance parameter L4 between the projected edge and the outer edge of the reference floor in the direction of the feed point to the physical center of the radiation plate satisfies L4.gtoreq.lambda/64.

In an embodiment, the radiation plate is configured as a rectangular plate and has two radiation long sides and two radiation short sides, wherein the two radiation short sides are respectively parallel to the connection line between the feeding point and the physical center of the radiation plate, so that the side lengths of the two radiation long sides are respectively set in a range greater than or equal to λ/4 and less than or equal to λ/2.

In an embodiment, the side lengths of the two radiation short sides of the radiation plate are set in a range of lambda/4 + -2 mm.

In an embodiment, the radiation plate is provided as a circular plate, wherein a diameter of the radiation plate provided as a circular plate is set to a range of λ/4 or more and λ/2 or less.

In an embodiment, the range of the parameter L3 at L3. Gtoreq.lambda/32 is set to tend to lambda/32 and the range of the parameter L4 at L4. Gtoreq.lambda/64 is set to tend to lambda/64 to the direction of the line connecting between the feeding point and the physical center of the radiating plate, so that the size of the reference ground plate can be set in a range of less than 22mm to reduce the size of the planar antenna in that direction.

In an embodiment, the reference floor is set to a size in a range of 15.00mm to 20mm in a direction parallel to a line between the physical center of the radiation plate and the feeding point, and is set to a size in a range of 26mm to 30mm in a direction perpendicular to a line between the physical center of the radiation plate and the feeding point.

In one embodiment, the parameter L3 is set in the range of λ/4+ -2 mm to enable the reference floor to enhance the gain of the patch antenna in response to the peak of the electric wave generated by the patch antenna.

Drawings

Fig. 1A and 1B are schematic structural views of a planar antenna according to the prior art.

Fig. 2A to 2C are schematic structural diagrams of a panel antenna according to a first embodiment of the present invention at different viewing angles.

Fig. 2D is a schematic perspective view of a panel antenna according to the first embodiment of the present invention.

Fig. 3A and 3B are schematic structural views of the patch antenna according to the modified embodiment of the above-described first embodiment of the present invention.

Fig. 4A to 4C are schematic structural views of a panel antenna according to a second embodiment of the present invention at different viewing angles.

Fig. 4D is a schematic perspective view of a panel antenna according to the second embodiment of the present invention.

Fig. 5A and 5B are schematic structural views of the patch antenna according to the modified embodiment of the above second embodiment of the present invention.

Fig. 6 is a schematic diagram showing the radiation area range comparison of the patch antenna according to the above embodiment of the present invention.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through a medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

As illustrated in fig. 2A to 2D, a panel antenna according to a first embodiment of the present invention is illustrated, wherein the panel antenna includes a reference floor 10, a dielectric layer 20 and a radiation plate 30, wherein the radiation plate 30 is adjacently disposed to the reference floor 10, wherein the dielectric layer 20 is disposed between the reference floor 10 and the radiation plate 30 so as to be capable of supporting the radiation plate 30 in a positional relationship in which the radiation plate 30 is adjacently disposed to the reference floor 10. And, the dielectric layer 20 forms a radiation slit 40 between the radiation plate 30 and the reference chassis 10. In other words, since the dielectric layer 20 is held between the radiation plate 30 and the reference chassis base 10, the dielectric layer 20 has a height difference between the radiation plate 30 and the reference chassis base 10, thereby forming the radiation slit 40 between the radiation plate 30 and the reference chassis base 10.

It will be appreciated that the radiation plate 30 is configured as a conductive thin layer made of a conductive material, and thus, the radiation plate 30 may be configured by attaching a suitable conductive thin plate to the dielectric layer 20, or by forming the radiation plate 30 by coating a suitable conductive material on the dielectric layer 20, which is not limited in the present invention.

It should be noted that the type of the dielectric layer 20 is not limited in the planar antenna of the present invention, as long as the radiation slit 40 can be formed between the radiation plate 30 and the reference floor 10. For example, the dielectric layer 20 may be a solid dielectric or an air dielectric, that is, in a specific example of the planar antenna of the present invention, the radiation plate 30 may be suspended to be held at an upper portion of the reference floor 10, thereby forming the radiation slit 40 between the radiation plate 30 and the reference floor 10. Alternatively, in other specific examples of the panel antenna, the dielectric layer 20 may be integrally formed with the reference floor 10, or the dielectric layer 20 may be integrally formed with the radiation plate 30.

As shown in fig. 2A to 2D, the radiation plate 30 has a feeding point 31, wherein the feeding point 31 is formed on the radiation plate 30, and the feeding point 31 is eccentrically disposed on the radiation plate 30. In the present invention, the eccentric arrangement of the feeding point 31 means that the feeding point 31 is arranged in a manner offset from the physical center C of the radiation plate 30.

More specifically, let the radiation wave wavelength of the panel antenna in the operation state be λ, the feeding point 31 be set to be greater than or equal to λ/64 from the physical center C of the radiation plate 30, so that the panel antenna can be excited in the operation state by inputting an excitation electric signal at the feeding point 31, thereby generating radiation waves at the radiation plate 30, and the distance between the feeding point 31 and the physical center C of the radiation plate 30 is further set to be less than or equal to λ/16, so as to maintain the stability of the operation state of the panel antenna. In other words, let the distance parameter between the feeding point 31 and the physical center C of the radiation plate 30 be D, where the range of the parameter D is: d is more than or equal to lambda/64. Preferably, the range of values of reference D is: lambda/64 is equal to or less than D is equal to or less than lambda/16.

It is worth mentioning that the radiation plate 30 is preferably configured such that a physical dimension in at least one direction perpendicular to a line between the physical center C of the radiation plate 30 and the feeding point 31 is greater than or equal to λ/4, so that the radiation plate 30 can enhance the gain of the panel antenna in response to a peak of an electric wave generated by the panel antenna and maintain stability of the gain of the panel antenna.

Further, in the first embodiment of the present invention, the thickness parameter of the dielectric layer 20 is set to be H, where the range of the value of the parameter H is: h.ltoreq.lambda/32 so that the distance between the reference floor 10 and the radiation plate 30 can be maintained within lambda/32, thereby enabling the panel antenna to operate stably.

In particular, the shape and size relationship between the radiant panel 30 and the reference floor 10 is set to satisfy: the panel surface area of the radiation plate 30 is smaller than that of the reference floor 10, and the projection of the radiation plate 30 on the plane of the reference floor 10 is located in the reference floor 10, wherein a distance parameter L between the edge of the projection of the radiation plate 30 on the reference floor 10 and the corresponding outer edge of the reference floor 10 in a direction parallel to the line of the physical center C of the radiation plate 30 and the feeding point 31 is as follows: the distance parameter L3 between the projected edge in the direction of the physical center C of the radiation plate 30 to the feeding point 31 and the outer edge of the reference floor 10 satisfies: l3. Gtoreq.lambda./32, and a distance parameter L4 between the projected edge and the outer edge of the reference floor 10 in the direction of the feeding point 31 to the physical center C of the radiation plate 30 satisfies: l4 is not less than lambda/64.

That is, the actual size of the panel antenna is mainly determined by the size of the reference floor 10, and thus, reducing the size of the reference floor 10 corresponds to reducing the size of the panel antenna on the basis of satisfying a certain dimensional relationship between the reference floor 10 and the radiation plate 30.

It will be understood by those skilled in the art that the projection of the radiation plate 30 onto the reference floor 10 is to be understood as assuming that the shadow of the radiation plate 30 formed by the radiation plate 30 onto the reference floor 10 is irradiated with parallel light in a direction perpendicular to the radiation plate 30, wherein the introduction of the projection of the radiation plate 30 onto the reference floor 10 is only used to describe the shape and size relation of the radiation plate 30 and the reference floor 10, wherein the actual presence or absence of the projection does not constitute a limitation of the present invention.

It will be appreciated that while maintaining the aforementioned positional relationship and physical dimensions of the radiation plate 30 and the reference floor 10, the shape of the radiation plate 30 and the reference floor 10 may be variously modified, such as a circle, a semicircle, a sector, an ellipse, a trapezoid, a regular polygon, etc., wherein the shape of the radiation plate 30 and the reference floor 10 having a certain geometrical rule is more advantageous for the design of circuit parameters of the panel antenna, which is not limited in the present invention.

Specifically, in the first embodiment of the present invention, the radiation plate 30 is configured as a rectangular plate, and then the projection of the radiation plate 30 configured as a rectangular plate on the reference floor 10 is also rectangular. The radiation plate 30, which is configured as a rectangular plate, has two radiation long sides and two radiation short sides, wherein the two radiation long sides are a first radiation long side 301 and a second radiation long side 302, respectively, and the feeding point 31 is disposed between the first radiation long side 301 and the second radiation long side 302 of the radiation plate 30 at a position close to one of the first radiation long side 301 and the second radiation long side 302. Illustratively, in the first embodiment of the present invention, the feeding point 31 is disposed between the two radiating long sides of the radiating plate 30 at a position close to the first radiating long side 301, that is, a distance parameter between the feeding point 31 and the first radiating long side 301 is set to L1, and a distance parameter between the feeding point 31 and the second radiating long side 302 is set to L2, where L1< L2.

In this way the shape and size relationship between the radiant panel 30 and the reference floor 10 is set to satisfy: in the rectangular projection of the radiation plate 30 on the reference floor 10, a distance parameter L3 between a projection side corresponding to the first radiation long side 301 in a direction from the physical center C of the radiation plate 30 to the feeding point 31 and an outer edge of the reference floor 10 satisfies: l3 ≡λ/32, the distance parameter L4 between the projected edge corresponding to the second radiation long edge 302 and the outer edge of the reference floor 10 in the direction from the feeding point 31 to the physical center C of the radiation plate 30 satisfies: l4 is not less than lambda/64.

In particular, the shape and size relationship between the radiant panel 30 and the reference floor 10 is further configured to satisfy: in the first embodiment of the present invention, that is, in the length direction of the radiation plate 30, the dimension of the reference floor 10 is greater than or equal to the dimension of the radiation plate 30 in the direction perpendicular to the line direction of the physical center C of the radiation plate 30 and the feeding point 31, that is, the dimension of the reference floor 10 in the length direction of the radiation plate 30 is not limited on the basis that the aforementioned projection of the radiation plate 30 on the plane of the reference floor 10 is located in the reference floor 10.

Further, the side length of the radiation long side of the radiation plate 30, which is provided as a rectangular plate, is greater than or equal to λ/4, so that the first radiation long side 301 of the radiation plate 30, which is closer to the feeding point 31, can enhance the gain of the panel antenna in response to the peak of the electric wave generated by the panel antenna, and maintain the stability of the gain of the panel antenna.

In particular, to reduce the size of the radiation plate 30 while maintaining the gain of the panel antenna, the radiation plate 30 is further configured to satisfy: the side length of the radiation long side of the radiation plate 30 is less than or equal to lambda/2, i.e., the side length of the radiation long side of the radiation plate 30 is set to be in a range of lambda/4 or less than or equal to lambda/2, and the width of the radiation plate 30, i.e., the side length of the radiation short side of the radiation plate 30 is maintained to be in a range of lambda/4 + -2 mm. That is, in order to reduce the size of the radiation plate 30 to a greater extent while maintaining the gain of the panel antenna, the radiation plate 30 is preferably arranged to satisfy: the side length of the radiation long side of the radiation plate 30 tends to be lambda/4 on the premise of being greater than or equal to lambda/4, the side length of the radiation short side of the radiation plate 30 is maintained within a range of lambda/4 + -2 mm, and the side length of the radiation long side is greater than the side length of the radiation short side.

In this way, the dimension of the reference floor 10 in the direction perpendicular to the line connecting the physical center C of the radiation plate 30 and the feeding point 31 can be set to be approximately the dimension of the radiation plate 30, accordingly, to reduce the dimension of the panel antenna in such a manner that the dimension of the reference floor 10 is reduced in the direction perpendicular to the line connecting the physical center C of the radiation plate 30 and the feeding point 31.

It should be noted that, in the first embodiment of the present invention, the reference floor 10 is implemented as a rectangular plate, wherein the length direction of the reference floor 10 is parallel to the length direction of the radiation plate 30, so as to form a certain geometrical arrangement relationship between the radiation plate 30 and the reference floor 10, which is more beneficial to the design of circuit parameters of the panel antenna, but is not limited to the present invention. That is, in the case where the radiation plate 30 and the reference floor 10 of the panel antenna satisfy the aforementioned positional relationship and physical dimensions, the arrangement relationship of the radiation plate 30 and the reference floor 10 may be variously modified, as the radiation plate 30 and the reference floor 10 may be further configured to: the length direction of the radiation plate 30, which is provided as a rectangular plate, is parallel to the width direction of the reference floor 10, which is provided as a rectangular plate, to which the present invention is not limited.

It will be appreciated by those skilled in the relevant art that as the size of the reference floor 10 of the patch antenna is reduced, the radiation gain of the patch antenna is reduced, degrading the performance of the patch antenna. The prior art does not address the reduction in radiation gain due to the reduced size of the reference floor 10.

The shape and size relationship between the radiation plate 30 and the reference floor 10 is such that: in the rectangular projection of the radiation plate 30 on the reference floor 10, a distance parameter L3 between the projection side corresponding to the first radiation long side 301 and the outer edge of the reference floor 10 in the direction from the physical center C of the radiation plate 30 to the feeding point 31 satisfies that l3++λ/32, when the size of the reference floor 10 is adjusted so as to reduce the parameter L3, each time the parameter L3 is reduced by λ/16, the radiation gain of the panel antenna is reduced by 5% to 10%.

The invention compensates the reduction of the radiation gain caused by the reduction of the parameter L3 by increasing the thickness parameter H of the dielectric layer 20 of the panel antenna, wherein the radiation gain of the panel antenna is increased by 5 to 10 percent for each 0.1mm increase of the thickness parameter H of the dielectric layer 20, so as to compensate the reduction of the radiation gain caused by the reduction of the parameter L3. Therefore, the overall size of the panel antenna can be reduced at the same time under the condition that the radiation gain of the panel antenna is kept unchanged, and the panel antenna is miniaturized.

In the present invention, the thickness parameter H of the dielectric layer 20 is further set to satisfy: h.gtoreq.lambda.64, that is to say, the thickness parameter H of the dielectric layer 20 is set to satisfy: lambda/64 is less than or equal to H and less than or equal to lambda/32.

Therefore, when the reference floor 10 is reduced in size such that the parameter L3 is reduced, wherein each time the parameter L3 is reduced by λ/16, the thickness of the dielectric layer 20 is increased by 0.1mm for compensating for the reduction in radiation gain due to the reduction of the parameter L3 corresponding to the reduction in size of the reference floor 10, so that the overall size of the panel antenna can be reduced at the same time while maintaining or increasing the radiation gain.

It will be appreciated that the extent to which the radiation gain of the patch antenna is reduced, corresponding to the reduced size of the parameter L3, is non-linear, that is, the extent to which the radiation gain of the patch antenna is reduced tends to correspond to the reduced size of the parameter L3 by λ/16 when the reduced size of the parameter L3 is less than λ/16, and the extent to which the radiation gain of the patch antenna is reduced tends to correspond to the reduced size of the parameter L3 by λ/8 when the reduced size of the parameter L3 exceeds λ/16 but is less than λ/8.

Further, in the present invention, in the rectangular projection of the radiation plate 30 onto the reference floor 10, the radiation gain of the planar antenna is maintained stable when the parameter L4 is reduced by adjusting the size of the reference floor 10 on the basis that the distance parameter L4 between the projection side corresponding to the second radiation long side 302 and the outer edge of the reference floor 10 in the direction from the feeding point 31 to the physical center C of the radiation plate 30 satisfies L4. Gtoreq.lambda/64.

Therefore, in the present invention, in order to reduce the size of the panel antenna to a greater extent, the shape and size relationship between the radiation plate 30 and the reference floor 10 is preferably set to satisfy: in the rectangular projection of the radiation plate 30 onto the reference floor 10, a distance parameter L3 between the projection side corresponding to the first radiation long side 301 and the outer edge of the reference floor 10 in the direction from the physical center C of the radiation plate 30 to the feeding point 31 satisfies l3++λ/32 and approaches λ/32, and a distance parameter L4 between the projection side corresponding to the second radiation long side 302 and the outer edge of the reference floor 10 in the direction from the feeding point 31 to the physical center C of the radiation plate 30 satisfies l4++λ/64 and approaches λ/64.

It will be appreciated by those skilled in the art that the panel antenna is disposed in an operating frequency band of 5.8GHZ, wherein the radiation wavelength λ of the panel antenna applied in the 5.8GHZ band is about 51.7mm as known by the conversion relation λ=v/f between wavelength and frequency, and in the first embodiment of the present invention, the radiation long side of the radiation plate 30 has a side length ranging from 13mm to 26mm, the radiation short side of the radiation plate 30 has a side length ranging from 11mm to 15mm, and the radiation long side of the radiation plate 30 has a side length greater than the side length of the radiation short side. The distance between the feeding point 31 of the radiation plate 30 and the physical center C is 0.8mm to 3.3mm. The thickness parameter H of the dielectric layer 20 ranges from: h is more than or equal to 0.8mm and less than or equal to 1.6mm. In the rectangular projection of the radiation plate 30 on the reference floor 10, a distance parameter L3 between a projection side corresponding to the first radiation long side 301 in a direction from the physical center C of the radiation plate 30 to the feeding point 31 and an outer edge of the reference floor 10 satisfies: l3 is equal to or greater than 1.6mm, and a distance parameter L4 between a projection side corresponding to the second radiation long side 302 and the outer edge of the reference floor 10 in a direction from the feeding point 31 to the physical center C of the radiation plate 30 satisfies: l4 is more than or equal to 0.8mm.

This is so as to satisfy, when the parameter L3 and the thickness parameter H of the dielectric layer 20: when the parameter L3 is reduced by λ/16 each time because the size of the reference floor 10 is reduced in the range of L3.gtoreq.1.6 mm, the thickness parameter H of the dielectric layer 20 can be increased by 0.1mm in the range of 0.8 mm.ltoreq.H.ltoreq.1.6 mm, so that the overall size of the panel antenna can be reduced at the same time while maintaining or increasing the radiation gain of the panel antenna.

Thus, the parameter L4 can be set to tend to 0.8mm in the range of l4+.0.8mm, and the parameter L3 can be set to tend to 1.6mm in the range of l3+.1.6mm, so that the dimension of the reference floor 10 in the direction parallel to the line between the physical center C of the radiation plate 30 and the feeding point 31 can be set to be within the range of less than 22mm so that the dimension of the patch antenna in this direction can be smaller than the dimension of the existing patch antenna shown in fig. 1A.

Further, in a direction perpendicular to the line between the physical center C of the radiation plate 30 and the feeding point 31, the reference floor 10 can be set to a side length toward the radiation long side of the radiation plate 30, so that the dimension of the reference floor 10 in the direction perpendicular to the line between the physical center C of the radiation plate 30 and the feeding point 31 can be set within a range of less than 32mm so that the dimension of the patch antenna in this direction can also be smaller than the dimension of the existing patch antenna shown in fig. 1A, thereby enabling the dimension of the patch antenna of the present invention to be smaller than the dimension of the existing patch antenna shown in fig. 1A.

It is worth mentioning that, in order to reduce the size of the patch antenna to a greater extent and maintain the stability of the gain of the patch antenna, it is preferable that the reference floor 10 be set to a size in a range of 15.00mm to 20mm in a direction parallel to a line between the physical center C of the radiation plate 30 and the feeding point 31, and be set to a size in a range of 26mm to 30mm in a direction perpendicular to a line between the physical center C of the radiation plate 30 and the feeding point 31.

It should be understood by those skilled in the relevant art that the shape of the reference floor 10 may be implemented in other shapes, not limited to a rectangle; similarly, in the present invention, the shape of the radiation plate 30 is not limited to a rectangle, but may be implemented as other shapes.

As shown in fig. 3A and 3B, which illustrate a panel antenna of a modified embodiment of the above-described first embodiment of the present invention, as such, the panel antenna includes a reference floor 10A, a dielectric layer 20A and a radiation plate 30A, wherein the radiation plate 30A is adjacently disposed to the reference floor 10A, wherein the dielectric layer 20A is disposed between the reference floor 10A and the radiation plate 30A so as to form a positional relationship in which the radiation plate 30A is adjacently disposed to the reference floor 10A so as to be capable of supporting the radiation plate 30A. And, the dielectric layer 20A forms a radiation slit 40A between the radiation plate 30A and the reference floor 10A.

Further, the radiation plate 30A has a feeding point 31A, wherein the feeding point 31A is formed on the radiation plate 30A, and the feeding point 31A is eccentrically disposed on the radiation plate 30A. In the present invention, the eccentric arrangement of the feeding point 31A means that the feeding point 31A is arranged in a manner deviated from the physical center C of the radiation plate 30A.

In particular, in this modified embodiment of the present invention, the radiation plate 30A of the panel antenna is implemented as a circular plate, and thus the center of the radiation plate 30A provided as a circular plate is the physical center C of the radiation plate 30A.

More specifically, let the wavelength of the radiation wave of the planar antenna in the working state be λ, the distance parameter between the feeding point 31A and the center of the radiation plate 30A be D, where the range of the parameter D is: d Σ/64 so that the panel antenna can be excited in the operating state by the excitation electric signal being inputted to the feeding point 31A, thereby generating the radiation electric wave in the radiation plate 30A, and the distance between the feeding point 31A and the physical center C of the radiation plate 30A is further set to be less than or equal to λ/16 to maintain the stability of the operating state of the panel antenna, i.e., the distance between the feeding point 31A and the center of the radiation plate 30A is set to be in the range of λ/64 or more and λ/16 or less.

Also, the physical dimension in the direction of the line between the physical center C of the radiation plate 30A and the feeding point 31A is greater than or equal to λ/4, i.e., the diameter of the radiation plate 30A, which is provided as a circular plate, is preferably set to be greater than or equal to λ/4, so that the radiation plate 30A can enhance the gain of the planar antenna in response to the peak of the electric wave generated by the planar antenna and maintain the stability of the gain of the planar antenna.

Further, in order to reduce the size of the radiation plate 30A while maintaining the gain of the panel antenna, the radiation plate 30A is further configured to satisfy: the diameter of the radiation plate 30A, which is provided as a circular plate, is less than or equal to λ/2, i.e., the diameter of the radiation plate 30A is set to be in a range of greater than or equal to λ/4 and less than or equal to λ/2. That is, in order to reduce the size of the radiation plate 30A to a greater extent while maintaining the gain of the panel antenna, the radiation plate 30A is preferably arranged to satisfy: the diameter of the radiation plate 30A, which is provided as a circular plate, tends to be lambda/4 on the premise of being greater than or equal to lambda/4.

Likewise, the shape and size relationship between the radiation plate 30A and the reference floor 10A is set to satisfy: the panel surface area of the radiation plate 30A is smaller than the panel surface area of the reference floor 10A, and the projection of the radiation plate 30A on the plane of the reference floor 10A is located in the reference floor 10A, wherein a distance parameter L between the edge of the projection of the radiation plate 30A on the reference floor 10A and the corresponding outer edge of the reference floor 10A in a direction parallel to the line connecting the center of the radiation plate 30A and the feeding point 31A satisfies: the distance parameter L3 between the projected edge in the direction from the center of the radiation plate 30A to the feeding point 31A and the outer edge of the reference floor 10A satisfies l3+.lambda/32, and the distance parameter L4 between the projected edge in the direction from the feeding point 31A to the center of the radiation plate 30A and the outer edge of the reference floor 10A satisfies: l4 is not less than lambda/64.

It is worth mentioning that the shape and size relationship between the radiation plate 30A and the reference floor 10A is further set to satisfy: the dimension of the reference floor 10A in the direction perpendicular to the line between the center of the radiation plate 30 and the feeding point 31 is not limited, on the basis that the dimension of the reference floor 10A is larger than or equal to the dimension of the radiation plate 30A, that is, the aforementioned projection of the radiation plate 30A onto the plane of the reference floor 10A is located in the reference floor 10A, the dimension of the reference floor 10A in the direction perpendicular to the line between the center of the radiation plate 30A and the feeding point 31A.

Also, in this modified embodiment of the present invention, the reference floor 10A is implemented as a rectangular plate, wherein the radiation plate 30A and the reference floor 10A are arranged to satisfy: the direction of the connection line between the center of the radiation plate 30A and the feeding point 31A is perpendicular to the length direction of the reference floor 10A, so as to form a certain geometrical arrangement relationship between the radiation plate 30A and the reference floor 10A, which is more beneficial to the design of circuit parameters of the panel antenna, but is not limited to the present invention.

That is, the radiation plate 30A and the reference floor 10A satisfy, between the edge satisfying the aforementioned projection of the radiation plate 30A to the reference floor 10A and the corresponding outer edge of the reference floor 10A, a distance parameter L in a direction parallel to the line connecting the center of the radiation plate 30A and the feeding point 31A: on the basis of L.gtoreq.lambda.32, the arrangement relation of the radiation plate 30A and the reference floor 10A and the shape and the size of the reference floor can be changed in various ways, for example, the connection line direction of the center of the radiation plate 30A and the feeding point 31A is inclined to the width direction of the reference floor 10A, for example, the reference floor 10A can be set as a circular plate, and the invention is not limited thereto.

Also, in this modified embodiment of the present invention, the shape and size relationship between the radiation plate 30A and the reference floor 10A is satisfied: in the circular projection of the radiation plate 30A onto the reference floor 10A, the distance L3 between the projected edge of the radiation plate 30A in the direction from the center of the radiation plate 30A to the feeding point 31A and the outer edge of the reference floor 10A is set to be equal to or greater than λ/32, and when the size of the reference floor 10A is adjusted so that the parameter L3 is reduced, the radiation gain of the planar antenna is reduced by 5% to 10% every time L3 is reduced by λ/16.

To compensate for the decrease in radiation gain due to the decrease in the parameter L3, the present invention compensates for the decrease in radiation gain due to the decrease in the parameter L3 by increasing the thickness parameter H of the dielectric layer 20A of the panel antenna, wherein each 0.1mm increase in the thickness parameter H of the dielectric layer 20A increases the radiation gain of the panel antenna by 5% to 10%. Thus, the overall size of the panel antenna can be reduced simultaneously under the condition that the radiation gain is kept unchanged, so that the panel antenna is miniaturized, wherein the thickness parameter H of the dielectric layer 20A is set to meet the following conditions: lambda/64 is less than or equal to H and less than or equal to lambda/32.

Therefore, when the reference floor 10A is reduced in size such that the parameter L3 is reduced, wherein each time the parameter L3 is reduced by λ/16, the thickness of the dielectric layer 20A is increased by 0.1mm for compensating for the reduction in radiation gain due to the reduction of the parameter L3 corresponding to the reduction in size of the reference floor 10A, so that the overall size of the panel antenna can be reduced at the same time while maintaining or increasing the radiation gain.

Further, in the present invention, the shape and size relationship between the radiation plate 30A and the reference floor 10A is satisfied: in the circular projection of the radiation plate 30A on the reference floor 10A, a distance parameter L4 between the projected edge and the outer edge of the reference floor 10A in the direction from the feeding point 31A to the center of the radiation plate 30A is maintained stable when the radiation gain of the planar antenna is reduced by the parameter L4 due to the reduction of the size of the reference floor 10A on the basis of satisfying l4++λ/64.

Therefore, in the present invention, in order to reduce the size of the panel antenna to a greater extent, the shape and size relationship between the radiation plate 30 and the reference floor 10 is preferably set to satisfy: in the circular projection of the radiation plate 30A on the reference floor 10A, a distance parameter L3 between the projected edge and the outer edge of the reference floor 10A in the direction from the center of the radiation plate 30A to the feeding point 31A satisfies l3++λ/32 and tends to λ/32, and a distance parameter L4 between the projected edge and the outer edge of the reference floor 10A in the direction from the feeding point 31A to the center of the radiation plate 30A satisfies l4++λ/64 and tends to λ/64.

That is, when the patch antenna is applied to a frequency band of 5.8GHZ, the radiation wavelength λ of the patch antenna is about 51.7mm, and in this modified embodiment of the present invention, the diameter of the radiation plate 30A provided as a circular plate ranges from 13mm to 26mm. The distance between the feeding point 31A and the physical center C of the radiation plate 30A is 0.8mm to 3.3mm. The thickness parameter H of the dielectric layer 20 ranges from: h is more than or equal to 0.8mm and less than or equal to 1.6mm. In the circular projection of the radiation plate 30A on the reference floor 10A, a distance parameter L3 between an edge of the projection in a direction from a center of the radiation plate 30A to the feeding point 31A and an outer edge of the reference floor 10A satisfies: l3 is 1.6mm or more, and a distance parameter L4 between the projected edge and the outer edge of the reference floor 10A in the direction from the feed point 31A to the center of the radiation plate 30A satisfies: l4 is more than or equal to 0.8mm.

This is so as to satisfy, when the parameter L3 and the thickness parameter H of the dielectric layer 20A: when the parameter L3 is reduced by λ/16 each time because the size of the reference floor 10 is reduced in the range of L3.gtoreq.1.6 mm, the thickness parameter H of the dielectric layer 20 can be increased by 0.1mm in the range of 0.8 mm.ltoreq.H.ltoreq.1.6 mm, so that the overall size of the panel antenna can be reduced at the same time while maintaining or increasing the radiation gain of the panel antenna.

Thus, the parameter L4 can be set to tend to 0.8mm in the range of l4+.0.8mm, and the parameter L3 can be set to tend to 1.6mm in the range of l3+.1.6mm, so that the dimension of the reference floor 10A in the direction parallel to the line between the center of the radiation plate 30A and the feeding point 31A can be set to be within the range of less than 22mm, so that the dimension of the patch antenna in this direction can be smaller than the dimension of the existing patch antenna shown in fig. 1A.

Further, in a direction perpendicular to a line between the center of the radiation plate 30A and the feeding point 31A, the reference floor 10A can be set to tend to the diameter of the radiation plate 30A so that a dimension of the reference floor 10A in the direction perpendicular to the line between the physical center C of the radiation plate 30A and the feeding point 31A can be set within a range of less than 32mm so that a dimension of the patch antenna in this direction can also be smaller than that of the existing patch antenna shown in fig. 1A, thereby enabling the dimension of the patch antenna of the present invention to be smaller than that of the existing patch antenna shown in fig. 1A.

It is worth mentioning that, in order to reduce the size of the panel antenna to a greater extent and maintain the stability of the gain of the panel antenna, it is preferable that the reference floor 10A is set to a size ranging from 15.00mm to 20mm in a direction parallel to a line between the center of the radiation plate 30A and the feeding point 31A, and a size ranging from 26mm to 30mm in a direction perpendicular to a line between the center of the radiation plate 30A and the feeding point 31A.

Specifically, referring to fig. 6 of the drawings, which is a schematic diagram of a radiation area test chart of a different panel antenna in an operating state, wherein a radiation area 11 is a radiation area of a conventional panel antenna in an operating state, and a radiation area 34 is a radiation area of the panel antenna in an operating state of the panel antenna according to the first embodiment and the modification thereof, wherein the radiation area 34 is maintained to be stable compared with the radiation area 11 of the conventional panel antenna on the premise that the shape and size relationship between the radiation plate 30 and the reference floor 10 satisfy the foregoing description.

As shown in fig. 4A to 4D, which are illustrations of a patch antenna according to a second embodiment of the present invention, the patch antenna includes a reference floor 10', a dielectric layer 20' and a radiation plate 30', wherein the radiation plate 30' is adjacently disposed to the reference floor 10', wherein the dielectric layer 20' is disposed between the reference floor 10' and the radiation plate 30' so as to form a positional relationship in which the radiation plate 30' is adjacently disposed to the reference floor 10' so as to be capable of supporting the radiation plate 30 '. And the dielectric layer 20 'is such that a radiation slit 40' is formed between the radiation plate 30 'and the reference floor 10'.

Further, the radiation plate 30 'has a feeding point 31', wherein the feeding point 31 'is formed at the radiation plate 30', and the feeding point 31 'is eccentrically disposed at the radiation plate 30'. In the present invention, the eccentric arrangement of the feeding point 31' means that the feeding point 31' is arranged in a manner deviated from the physical center C of the radiation plate 30'.

More specifically, let the wavelength of the radiation wave of the planar antenna in the working state be λ, the feeding point 31 'is set as a distance parameter D between the feeding point and the physical center C of the radiation plate 30', where the range of D is: d is equal to or greater than λ/64, so that the panel antenna can be excited to be in the operating state by the excitation electric signal inputted to the feeding point 31', thereby generating the radiation electric wave at the radiation plate 30', and the distance between the feeding point 31 'and the physical center C of the radiation plate 30' is further set to be less than or equal to λ/16, so as to maintain the stability of the operating state of the panel antenna. I.e. the distance between the feed point 31 'and the centre of the radiation plate 30' is set to be in the range of greater than or equal to lambda/64 and less than or equal to lambda/16.

Also, the radiation plate 30 'is preferably configured such that a physical dimension in at least one direction perpendicular to a line between the physical center C of the radiation plate 30' and the feeding point 31 'is greater than or equal to λ/4, so that the radiation plate 30' can enhance a gain of the panel antenna in response to a peak of an electric wave generated by the panel antenna and maintain stability of the gain of the panel antenna.

It should be noted that the radiation plate 30' is configured such that the radiation plate 30' may have various modifications such as a circle, a semicircle, a sector, an ellipse, a trapezoid, a regular polygon, etc. on the basis that at least one physical dimension perpendicular to a connection line direction between the physical center C of the radiation plate 30' and the feeding point 31' is greater than or equal to λ/4, wherein the shape of the radiation plate 30' having a certain geometrical rule is more advantageous for the design of circuit parameters of the panel antenna, which is not limited by the present invention.

Further, the shape and size relationship between the radiation plate 30 'and the reference floor 10' is set to satisfy: the plate surface area of the radiation plate 30 'is smaller than the plate surface area of the reference floor 10', and the projection of the radiation plate 30 'on the plane of the reference floor 10' is located in the reference floor 10', wherein a distance parameter L between the projected edge of the radiation plate 30' on the reference floor 10 'and the corresponding outer edge of the reference floor 10' in a direction parallel to the connection line of the physical center C of the radiation plate 30 'and the feeding point 31' is as follows: the distance parameter L3 between the projected edge in the direction of the physical center C of the radiation plate 30' to the feeding point 31' and the outer edge of the reference floor 10' satisfies: l3. Gtoreq.lambda./32, and a distance parameter L4 between the projected edge and the outer edge of the reference floor 10' in the direction of the feed point 31' to the physical center C of the radiation plate 30' satisfies: l4 is not less than lambda/64.

It should be understood that the shape of the reference floor 10' does not limit the present invention, and the reference floor 10' may be configured in any one of a circular shape, a semicircular shape, a fan shape, an elliptical shape, a trapezoid shape, a regular polygon shape, etc., on the basis that the shape and dimensional relationship between the radiation plate 30' and the reference floor 10' are configured to satisfy the foregoing conditions, wherein the shape of the reference floor 10' having a certain geometrical rule is more advantageous for the design of circuit parameters of the panel antenna, which is not limited by the present invention.

In particular, in the second embodiment of the present invention, in the projection of the radiation plate 30' onto the reference floor 10', the gain of the panel antenna is enhanced when the size of the reference floor 10' is increased corresponding to the increasing parameter L3 on the basis that the distance parameter L3 between the edge of the projection and the outer edge of the reference floor 10' in the direction from the physical center C of the radiation plate 30' to the feeding point 31' satisfies l3+_λ/32, and the gain of the panel antenna is maintained stable by continuing to increase the size of the reference floor 10' corresponding to the increasing parameter L3 after the parameter L3 reaches λ/4; the gain of the patch antenna is maintained stable when the size of the reference floor 10' is increased in correspondence with the increase parameter L4.

Specifically, referring to fig. 6 of the drawings of the specification of the present invention, in the projection of the radiation plate 30 'onto the reference floor 10', when a distance parameter L3 between an edge of the projection in a direction from a physical center C of the radiation plate 30 'to the feeding point 31' and an outer edge of the reference floor 10 'tends to be λ/4, a longitudinal diameter of a radiation region 34' of the panel antenna in its operating state is about 20 meters.

That is, in the second embodiment of the present invention, the gain of the patch antenna is enhanced while the size of the patch antenna is reduced, wherein the shape and size relationship between the radiation plate 30 'and the reference floor 10' is preferably set to satisfy: in the projection of the radiation plate 30' onto the reference floor 10', a distance parameter L3 between an edge of the projection in a direction of a physical center C of the radiation plate 30' to the feeding point 31' and an outer edge of the reference floor 10' tends to be λ/4, specifically, the parameter L3 is preferably maintained in a range of λ/4±2 mm; the distance parameter L4 between the projected edge in the direction of the feed point 31' to the physical center C of the radiation plate 30' and the outer edge of the reference floor 10' is ≡λ/64 and tends to λ/64.

Specifically, when the panel antenna is applied to a frequency band of 5.8GHZ, the radiation wavelength λ of the panel antenna is about 51.7mm, and in the second embodiment of the present invention, in order to reduce the size of the panel antenna while enhancing the gain of the panel antenna, the shape and size relationship between the radiation plate 30 'and the reference floor 10' is preferably set so as to satisfy: in the projection of the radiation plate 30' onto the reference floor 10', a distance parameter L3 between an edge of the projection in a direction from a physical center C of the radiation plate 30' to the feeding point 31' and an outer edge of the reference floor 10' tends to be 13mm, and specifically, the parameter L3 is preferably maintained in a range of 11 mm.ltoreq.l3.ltoreq.15 mm; the distance parameter L4 between the projected edge in the direction of the feed point 31' to the physical center C of the radiation plate 30' and the outer edge of the reference floor 10' is ≡0.8mm and tends to be 0.8mm.

Specifically, in the second embodiment of the present invention, the radiation plate 30' is configured as a rectangular plate, and then the projection of the radiation plate 30' configured as a rectangular plate onto the reference floor 10' is also rectangular. The radiation plate 30' configured as a rectangular plate has two radiation long sides and two radiation short sides, wherein the two radiation long sides are a first radiation long side 301' and a second radiation long side 302', respectively, and the feeding point 31' is disposed between the first radiation long side 301' and the second radiation long side 302' of the radiation plate 30' at a position close to one of the first radiation long side 301' and the second radiation long side 302 '. Illustratively, in the second embodiment of the present invention, the feeding point 31' is disposed between the two radiating long sides of the radiating plate 30' at a position close to the first radiating long side 301', that is, a distance parameter between the feeding point 31' and the first radiating long side 301' is L1, and a distance parameter between the feeding point 31' and the second radiating long side 302' is L2, where L1< L2.

Thus, the parameter L3 is the distance between the projection side corresponding to the first radiation long side 301 'and the outer edge of the reference floor 10' in the direction from the physical center C of the radiation plate 30 'to the feeding point 31' in the rectangular projection of the radiation plate 30 'on the reference floor 10', and the parameter L4 is the distance between the projection side corresponding to the second radiation long side 302 'and the outer edge of the reference floor 10' in the direction from the feeding point 31 'to the physical center C of the radiation plate 30'.

Also, in particular, the shape and size relationship between the radiation plate 30 'and the reference floor 10' is further set to satisfy: the dimension of the reference floor 10 'in the length direction of the radiation plate 30' is not limited on the basis that the dimension of the reference floor 10 'in the direction perpendicular to the line direction of the physical center C of the radiation plate 30' and the feeding point 31', i.e., in the length direction of the radiation plate 30', is greater than or equal to the dimension of the radiation plate 30', i.e., the aforementioned projection of the radiation plate 30' on the plane of the reference floor 10 'is located within the reference floor 10'.

Further, the side length of the radiation long side of the radiation plate 30 'provided as a rectangular plate is greater than or equal to λ/4, so that the first radiation long side 301' of the radiation plate 30 'which is closer to the feeding point 31' can enhance the gain of the panel antenna in response to the peak of the electric wave generated by the panel antenna, and maintain the stability of the gain of the panel antenna.

In particular, to reduce the size of the radiation plate 30 'while maintaining the gain of the panel antenna, the radiation plate 30' is further configured to satisfy: the side length of the radiation long side of the radiation plate 30 'is less than or equal to lambda/2, i.e., the side length of the radiation long side of the radiation plate 30' is set to be in a range of lambda/4 or less than or equal to lambda/2, and the width of the radiation plate 30', i.e., the side length of the radiation short side of the radiation plate 30' is maintained to be in a range of lambda/4 + -2 mm. That is, in order to reduce the size of the radiation plate 30 'to a greater extent while maintaining the gain of the panel antenna, the radiation plate 30' is preferably configured to satisfy: the side length of the radiation long side of the radiation plate 30 'tends to be lambda/4 on the premise of being greater than or equal to lambda/4, the side length of the radiation short side of the radiation plate 30' is maintained within a range of lambda/4 + -2 mm, and the side length of the radiation long side is greater than the side length of the radiation short side.

To further describe the second embodiment of the present invention, the patch antenna according to a modified embodiment of the second embodiment of the present invention is shown in fig. 5A and 5B, wherein the radiation plate 30' of the patch antenna is implemented as a circular plate, and thus the center of the radiation plate 30' configured as a circular plate is the physical center C of the radiation plate 30 '.

Specifically, the diameter of the radiation plate 30' provided as a circular plate is preferably set to be greater than or equal to λ/4 so that the physical dimension of the radiation plate 30' in a direction perpendicular to a line between the physical center C of the radiation plate 30' and the feeding point 31' is greater than or equal to λ/4, thereby enabling the radiation plate 30' to enhance the gain of the planar antenna in response to the peak of the electric wave generated by the planar antenna and maintaining the stability of the gain of the planar antenna.

Also, in order to reduce the size of the radiation plate 30 'while maintaining the gain of the panel antenna, the radiation plate 30' is further configured to satisfy: the diameter of the radiation plate 30 'which is provided as a circular plate is less than or equal to lambda/2, i.e., the diameter of the radiation plate 30' is provided to be in a range of greater than or equal to lambda/4 and less than or equal to lambda/2. That is, in order to reduce the size of the radiation plate 30 'to a greater extent while maintaining the gain of the panel antenna, the radiation plate 30' is preferably configured to satisfy: the diameter of the radiation plate 30' provided as a circular plate tends to be lambda/4 on the premise of being greater than or equal to lambda/4.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims

1. A panel antenna, comprising:

a reference floor;

a radiation plate, wherein the radiation plate has a feeding point, wherein the feeding point is provided to the radiation plate offset from a physical center of the radiation plate, wherein the radiation plate is provided adjacently to the reference floor, wherein the radiation plate and the reference floor are arranged to satisfy a projection of the radiation plate to the reference floor within the reference floor, wherein an operation wavelength of the panel antenna is set to λ, a direction perpendicular to a line between a physical center of the radiation plate and the feeding point, a size of the radiation plate is set in a range of less than or equal to λ/2, wherein a direction perpendicular to a line between a physical center of the radiation plate and the feeding point, a size of the reference floor is set to trend toward the size of the radiation plate while being greater than or equal to the size of the radiation plate, so that a size of the reference floor can be set in a range of less than 32mm and decrease in the direction, wherein a size of the panel antenna is set in a range of less than or equal to λ, a size of the radiation plate is set to a range of a value of at least one of a feeding parameter D, wherein a size of the radiation plate is set in a range of D is set to a value of at least one of a feeding parameter between the physical center of the radiation plate and the feeding point is set to a value of D, and the range of D is set to be equal to at least one of a feeding parameter D: λ/64+.d+.λ/16, wherein the radiation plate satisfies between the projected edge of the reference floor and the corresponding outer edge of the reference floor: a distance parameter L3 between the projected edge and the outer edge of the reference floor in the direction of the physical center of the radiation plate to the feeding point satisfies l3+.lambda/32, and a distance parameter L4 between the projected edge and the outer edge of the reference floor in the direction of the feeding point to the physical center of the radiation plate satisfies l4+.lambda/64; and

The dielectric layer is arranged between the reference floor and the radiation plate, so that the radiation plate can be supported to form a position relation that the radiation plate is adjacently arranged on the reference floor, wherein the thickness parameter of the dielectric layer is H, and the value range of the parameter H is as follows: lambda/64 is less than or equal to H and less than or equal to lambda/32.

2. The panel antenna according to claim 1, wherein the radiation plate is provided as a rectangular plate and has two radiation long sides and two radiation short sides, wherein the two radiation short sides are respectively parallel to the connection lines of the feeding point and the physical center of the radiation plate, so that the side lengths of the two radiation long sides are respectively set in a range of λ/4 or more and λ/2 or less.

3. The panel antenna according to claim 2, wherein side lengths of both the radiation short sides of the radiation plate are set in a range of λ/4±2mm, and the side length of each of the radiation short sides is smaller than the side length of each of the radiation long sides.

4. The panel antenna according to claim 1, wherein the radiation plate is provided as a circular plate, wherein a diameter of the radiation plate provided as a circular plate is set in a range of λ/4 or more and λ/2 or less.

5. The patch antenna of any one of claims 1 to 4, wherein a range of a parameter L3 at l3+.λ/32 is set to trend toward λ/32, a range of a parameter L4 at l4+.λ/64 is set to trend toward λ/64 to a line direction between the feeding point and a physical center of the radiation plate, so that a size of the reference ground plate can be set in a range of less than 22mm while reducing a size of the patch antenna in that direction.

6. The panel antenna according to claim 5, wherein a dimension of the reference floor in a direction parallel to a line between a physical center of the radiation plate and the feeding point is set in a range of 15.00mm to 20mm, and a dimension in a direction perpendicular to a line between a physical center of the radiation plate and the feeding point is set in a range of 26mm to 30 mm.

7. The patch antenna of any one of claims 1 to 4, wherein a parameter L3 is set in a range of λ/4±2mm so that the reference floor can enhance a gain of the patch antenna in response to a peak of an electric wave generated by the patch antenna.