WO2018184367A1

WO2018184367A1 - Reconfigurable dual-polarized broadband antenna

Info

Publication number: WO2018184367A1
Application number: PCT/CN2017/106220
Authority: WO
Inventors: 彭彪; 邓力; 李书芳; 张贯京; 葛新科; 高伟明; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-04-07
Filing date: 2017-10-14
Publication date: 2018-10-11
Also published as: CN206806508U

Abstract

The utility model discloses a reconfigurable dual-polarized broadband antenna, which comprises a hollow-out metal plate attached to an upper surface of a dielectric plate, an L-shaped metal microstrip line and an axe shaped monopole structure attached to a lower surface of the dielectric plate. A step-shaped hollow-out slit is etched on the hollow-out metal plate. The hollow-out metal plate is electrically connected to a ground end of a first SMA head, and the L-shaped metal microstrip line is electrically connected to a feeding end of the first SMA head. The axe shaped monopole structure is electrically connected to a feeding end of a second SMA head, and the hollow-out metal plate is electrically connected to a ground end of the second SMA head. A top of the tip of an equilateral trapezoidal metal piece of the axe shaped monopole structure is provided with a metal pad. The metal pad is grounded through a through-hole, and the metal pad is connected to the tip of the equilateral trapezoidal metal piece through a lumped capacitance. The reconfigurable dual-polarized broadband antenna of the present invention realizes dual polarization by using an orthogonal electric field mode of the step-shaped hollow-out slit resonance, so that the frequencies of the two feeding ports can be reconstructed and independently tuned.

Description

Reconfigurable dual-polarized broadband antenna

Technical field

[0001] The present invention relates to the field of communications technologies, and in particular, to a reconfigurable dual-polarized broadband antenna.

Background technique

[0002] In order to facilitate the large-scale popularization and application of communication terminals and radio frequency identification systems, the economic cost and size of terminals or systems are important considerations. As an important component of the antenna, the premise of ensuring higher performance indicators Underneath, multi-frequency, broadband, and miniaturization must be required. The mainstream method of prior art dual-polarized antenna design is achieved by arranging two identical antenna elements in mutually orthogonal orthogonal layout. Although the two antenna elements are placed in a vertical position and the shapes are closely embedded with each other to reduce the overall size of the antenna, subject to the design size of the antenna unit, the size of the dual-polarized antenna is difficult to be further reduced. And the two antenna elements are also more difficult to form better isolation.

technical problem

[0003] The main object of the present invention is to provide a reconfigurable dual-polarized broadband antenna, which aims to solve the technical problem that the existing dual-polarized antenna has a large size and poor isolation.

Problem solution

Technical solution

[0004] To achieve the above object, a reconfigurable dual-polarized broadband antenna includes a dielectric plate, a hollow metal sheet, an L-shaped metal microstrip line, a first SMA head, an axe monopole structure, and a second SMA a hollow metal sheet attached to an upper surface of the dielectric plate, the L-shaped metal microstrip line and the axe monopole structure being attached to a lower surface of the dielectric plate; the hollow metal The stepped hollowing slit is formed by the first rectangular hollowing, the second rectangular hollowing, the third rectangular hollowing, the fourth rectangular hollowing, and the fifth rectangular hollowing; the L-shaped metal micro a transverse portion of the line is parallel to a long side of a lower surface of the dielectric plate, a vertical portion of the L-shaped metal microstrip line being perpendicular to a long side of a lower surface of the dielectric plate; the axe monopole structure Including a strip-shaped vertical portion and an axe-shaped cross portion, the strip-shaped vertical portion of the axe-shaped monopole structure includes a first rectangular metal piece and a second rectangular metal piece that are connected, and the strip shape of the axe-shaped monopole structure The vertical portion is perpendicular to the long side of the lower surface of the dielectric plate Ax hatchet shaped cross section of the monopole structure comprises a symmetric

1 An equilateral trapezoidal metal piece disposed on two sides of the strip-shaped vertical portion of the axe monopole structure, the axe-shaped monopole structure being symmetric about a central axis of a broad side of a lower surface of the dielectric plate; An SMA head is disposed on the dielectric plate, the hollow metal piece is electrically connected to a ground end of the first SMA head, and the L-shaped metal microstrip line is electrically connected to a feeding end of the first SMA head; The SMA head is disposed on the dielectric plate, the axe monopole structure is electrically connected to the feeding end of the second SMA head, and the hollow metal piece is electrically connected to the ground end of the second SMA head; a vertical portion of the metal microstrip line extending to a bottom long side of a lower surface of the dielectric plate, the first SMA head being disposed on a vertical portion of the L-shaped metal microstrip line and a lower surface of the dielectric plate a first feeding port is formed on the dielectric plate at the intersection of the long sides of the bottom; a vertical portion of the axe monopole structure extends to a top long side of a lower surface of the dielectric plate, and the second SMA head is disposed on a medium at a position where a vertical portion of the axe monopole structure intersects a top long side of a lower surface of the dielectric plate Forming a second feed port; the reconfigurable dual-polarized broadband antenna further includes a pair of metal pads disposed on an upper portion of the tip end of the equilateral trapezoidal metal piece of the axe monopole structure, A via hole is disposed on the metal pad, and the metal pad is grounded through the via hole, and the metal pad is further connected to a tip end of the equilateral trapezoidal metal piece of the axe monopole structure by a lumped capacitance.

[0005] Preferably, the first rectangular hollow, the second rectangular hollow, the third rectangular hollow, the fourth rectangular hollow, and the wide side of the fifth rectangular hollow are parallel to the central axis of the broad side of the upper surface of the dielectric plate; The first rectangular cutout, the second rectangular cutout, the third rectangular cutout, the fourth rectangular cutout, and the fifth rectangular cutout are symmetric about the central axis of the wide side.

[0006] Preferably, the dielectric plate is a dielectric substrate of FR4, and the dielectric plate has a thickness of 0.8 mm and a dielectric constant of 4.4.

[0007] Preferably, the length of the dielectric plate and the hollow metal sheet is 74 mm, the width of the dielectric plate and the hollow metal sheet is 106 mm; the length of the first rectangular hollow is 52 mm, and the first rectangular hollow a width of 44 mm; a length of the second rectangular hollow is 32 mm, a width of the second rectangular hollow is 6 mm; a length of the third rectangular hollow is 6.7 mm, and a width of the third rectangular hollow is 10.5 mm; The fourth rectangular hollow has a length of 2.6 mm, the fourth rectangular hollow has a width of 17.7 mm, the fifth rectangular hollow has a length of 9.6 mm, and the fifth rectangular hollow has a width of 1.5 mm.

[0008] Preferably, the distance between the lower longitudinal edge of the stepped hollow gap and the lower longitudinal edge of the upper surface of the dielectric plate is 6.3 mm.

2 [0009] Preferably, the width of the L-shaped metal microstrip line is 1.32 mm, the length of the lateral portion of the L-shaped metal microstrip line is 27.6 mm, and the length of the vertical portion of the L-shaped metal microstrip line is 11.32mm.

[0010] Preferably, the distance between the vertical portion of the L-shaped metal microstrip line and the left wide side of the lower surface of the dielectric plate is 20.4 mm.

[0011] Preferably, the length of the first rectangular metal piece of the axe monopole structure is 2.5 mm, the width of the first rectangular metal piece is 36 mm; the second rectangle of the axe monopole structure The length of the metal piece is 1 mm, the width of the second rectangular metal piece is 11 mm; the length of the upper base of the equilateral trapezoidal metal piece of the axe-shaped monopole structure is 2.5 mm, and the equilateral trapezoidal metal piece The length of the lower base is 16 mm, and the height of the equilateral trapezoidal metal piece is 6.75 mm.

[0012] Preferably, a vertical distance between a center point of the equilateral trapezoidal metal piece of the axe-shaped monopole structure and a lower bottom side of the first rectangular metal piece of the axe-shaped monopole structure is 9.8 mm.

Advantageous effects of the invention

Beneficial effect

[0013] The reconfigurable dual-polarized broadband antenna of the present invention can realize the dual-polarized antenna by using the stepped-type hollow-cavity resonance, effectively utilizing the orthogonal electric field mode of the stepped-type hollow-cavity resonance, and can sufficiently reduce the antenna design size. A high isolation is formed between the two feed ports so that the frequencies of the two feed ports can be reconstructed and independently tuned.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a preferred embodiment of a reconfigurable dual-polarized broadband antenna of the present invention;

2 is a schematic structural view of a preferred embodiment of a hollow metal sheet of a reconfigurable dual-polarized broadband antenna of the present invention;

3 is a schematic structural view of a preferred embodiment of an L-shaped metal microstrip line and an axe monopole structure of the reconfigurable dual-polarized broadband antenna of the present invention;

4 is a schematic diagram showing simulation results of reflection coefficients of a reconfigurable dual-polarized broadband antenna of the present invention;

5 is a schematic diagram showing the simulation results of the reflection coefficient of the L0 parameter of the reconfigurable dual-polarized broadband antenna of the present invention.

6 is a schematic diagram showing the simulation results of the reflection coefficient of the dl parameter of the reconfigurable dual-polarized broadband antenna of the present invention. 7 is a schematic diagram of a simulation result of a reflection coefficient of a reconfigurable dual-polarized broadband antenna W4 parameter of the present invention. [0021] FIG. 8 is a simulation of a reflection coefficient of a reconfigurable dual-polarized broadband antenna LP3 parameter of the present invention. [0022] FIG. 9 is a schematic diagram showing the simulation results of the reflection coefficient of the reconfigurable dual-polarized broadband antenna S1 parameter of the present invention.

10 is a schematic diagram showing simulation results of reflection coefficients of a lumped capacitance parameter of a reconfigurable dual-polarized broadband antenna of the present invention.

[0024] The objects, features, and advantages of the present invention will be described in conjunction with the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1, FIG. 1 is a plan view showing a planar structure of a preferred embodiment of a reconfigurable dual-polarized wideband antenna of the present invention. In this embodiment, the reconfigurable dual-polarized broadband antenna 1 includes a dielectric plate 10, a hollow metal sheet 20, an L-shaped metal microstrip line 30, and a first SMA (Sub-Miniature-A) head 40, an axe shape. The monopole structure 50 and the second SMA (Sub-Miniature-A) head 60. The reconfigurable dual-polarized broadband antenna 1 has a rectangular parallelepiped structure (only a schematic plan view is shown in FIG. 1), the hollow metal sheet 20, the L-shaped metal microstrip line 30, and the axe monopole structure 50. All are copper. The dielectric plate 10 is a dielectric substrate of FR4, and the dielectric plate 10 has a thickness of 0.8 mm and a dielectric constant of preferably 4.4. The first SMA head 40 and the second SMA head 60 are coaxial connectors. The hollow metal sheet 20 is attached to the upper surface of the dielectric plate 10, and the L-shaped metal microstrip line 30 and the axe monopole structure 50 are attached to the lower surface of the dielectric plate 10. The stepped hollow sheet 21 is etched with a stepped hollow slit 21, and the stepped hollow slit 21 is composed of a first rectangular hollow 211, a second rectangular hollow 212, a third rectangular hollow 213, a fourth rectangular hollow 214, and a fifth rectangular shape. Hollow 215 in turn

4 The lateral portion 31 of the L-shaped metal microstrip line is parallel to the long side of the lower surface of the dielectric plate 10, and the vertical portion 32 of the L-shaped metal microstrip line and the lower surface of the dielectric plate 10 The long side is vertical; the axe monopole structure 50 includes a strip-shaped vertical portion 51 and an axe-shaped cross portion 52, and the strip-shaped vertical portion 51 of the axe-shaped monopole structure includes a first rectangular metal piece 511 that is joined And a second rectangular metal piece 512, the strip-shaped vertical portion 51 of the axe-shaped monopole structure is perpendicular to a long side of a lower surface of the dielectric plate 10; the axe-shaped lateral portion 52 of the axe-shaped monopole structure An equilateral trapezoidal metal piece 521 symmetrically disposed on both sides of the strip-shaped vertical portion 51 of the axe monopole structure, the wide side of the lower surface of the dielectric plate 10 with respect to the axe-shaped monopole structure 50 The first SMA head 40 is disposed on the dielectric plate 10, and the hollow metal piece 20 is electrically connected to the ground end of the first SMA head 40, and the L-shaped metal microstrip line 30 and the The feeding end of an SMA head 40 is electrically connected; the second SMA head 60 is disposed on the dielectric plate 10, and the axe monopole structure 50 and the feeding of the second SMA head 60 The terminal metal is electrically connected, and the hollow metal piece 20 is electrically connected to the ground end of the second SMA head 60. The vertical portion 32 of the L-shaped metal microstrip line extends to the bottom long side of the lower surface of the dielectric plate 10, and the first SMA head 40 is disposed on the vertical portion 32 of the L-shaped metal microstrip line a first feed port S11 is formed on the dielectric plate 10 at the intersection of the bottom and long sides of the lower surface of the dielectric plate 10; the vertical portion 51 of the axe monopole structure extends to the lower surface of the dielectric plate 10. a top side of the top, the second SMA head 60 is disposed on the dielectric plate 10 at a position where the vertical portion 51 of the axe monopole structure intersects the top long side of the lower surface of the dielectric plate 10 to form a second Feed port S22. The reconfigurable dual-polarized broadband antenna 1 further includes a pair of metal pads 70 disposed on an upper portion of the tip end of the equilateral trapezoidal metal piece 521 of the axicon monopole structure 50, the metal pad 70 A via 71 is provided, and the metal pad 70 is grounded through the via 71. The metal pad 70 also passes through the lumped capacitor 80 and the equilateral trapezoidal metal piece 521 of the axe monopole structure 50. Tip connection.

[0027] The reconfigurable dual-polarized broadband antenna of the present invention can realize the dual-polarized antenna by using the stepped-type hollow-cavity resonance, effectively utilizing the orthogonal electric field mode of the stepped-type hollow-cavity resonance, and can sufficiently reduce the antenna design size. A high isolation is formed between the two feed ports so that the frequencies of the two feed ports can be reconstructed and independently tuned.

Referring to FIG. 2, FIG. 2 is a schematic structural view of a preferred embodiment of a hollow metal sheet of a reconfigurable dual-polarized broadband antenna. In this embodiment, the wide sides of the first rectangular hollow 211, the second rectangular hollow 212, the third rectangular hollow 213, the fourth rectangular hollow 214, and the fifth rectangular hollow 215 are opposite to the upper surface of the dielectric plate 10. The broad side central axis is parallel; the first rectangular hollow 211, the second rectangular hollow 212, and the third rectangular hollow 2 13. The fourth rectangular cutout 214 and the fifth rectangular cutout 214 are symmetric about the central axis of the broad side.

[0029] The length W of the dielectric plate 10 and the hollow metal sheet 20 is 74 mm, the width L of the dielectric plate 10 and the hollow metal sheet 20 is 106 mm; and the length WO of the first rectangular hollow 211 is 52 mm. The width L0 of the first rectangular hollow 211 is 44 mm; the length W1 of the second rectangular hollow 212 is 32 mm, the width L1 of the second rectangular hollow 212 is 6 mm; and the length W2 of the third rectangular hollow 213 is 6.7. Mm, the width L2 of the third rectangular hollow 213 is 10.5 mm; the length W3 of the fourth rectangular hollow 214 is 2.6 mm, and the width L3 of the fourth rectangular hollow 214 is 17.7 mm; The length W4 of the 215 is 9.6 mm, and the width L4 of the fifth rectangular hollow 215 is 1.5 mm. The distance dx between the lower long side of the stepped hollow slit 21 and the lower longitudinal side of the upper surface of the dielectric plate 10 is 6.3 mm.

Referring to FIG. 3, FIG. 3 is a schematic structural view of a preferred embodiment of an L-shaped metal microstrip line and an axe monopole structure of a reconfigurable dual-polarized broadband antenna. The width WP1 of the L-shaped metal microstrip line 30 is 1.32 mm, the length d2 of the lateral portion 31 of the L-shaped metal microstrip line is 27.6 mm, and the length dl of the vertical portion 32 of the L-shaped metal microstrip line It is 11.32mm. The distance dO between the vertical portion 32 of the L-shaped metal microstrip line and the left wide side of the lower surface of the dielectric plate 10 was 20.4 mm. The length WP2 of the first rectangular metal piece 511 of the axe-shaped monopole structure 50 is 2.5 mm, the width LP2 of the first rectangular metal piece 511 is 36 mm, and the second rectangle of the axe-shaped monopole structure 50 5毫米, The length of the upper base S2 of the equilateral trapezoidal metal piece 521 of the axe-shaped monopole structure 50 is 2. 5mm, The length of the lower base of the equilateral trapezoidal metal piece is 16 mm, and the height d3 of the equilateral trapezoidal metal piece is 6.75 mm. The vertical distance between the center point of the equilateral trapezoidal metal piece 521 of the axe-shaped monopole structure 50 and the lower bottom side of the first rectangular metal piece 511 of the axe-shaped monopole structure 50 is 9.8 mm.

[0031] Referring to FIG. 4, FIG. 4 is a schematic diagram showing simulation results of reflection coefficients of a reconfigurable dual-polarized broadband antenna of the present invention. As can be seen from FIG. 4, the reconfigurable dual-polarized broadband antenna 1 has two feed ports, the reflection coefficient of the first feed port S11 is below -10 dB, and the operating frequency can cover 1.15 GHz to 2.93. GHz, FBW=86.9%, realizes three resonance modes of fml, fm2, and fm3; the reflection coefficient of the second feed port S 22 is below -10dB, and the operating frequency can cover 1.15GHz to 2.99GHz, FBW=58.9 % , realizes two resonance modes of fpl and f _P 2 . The isolation between the first feed port S11 and the second feed port S22 is less than -32 dB.

[0032] Referring to FIG. 5, FIG. 5 is a reflection coefficient simulation of the L0 parameter of the reconfigurable dual-polarized broadband antenna of the present invention. A schematic diagram of the true results. As can be seen from Figure 5, independent tuning of fm2 can be achieved by adjusting the width L0 of the first rectangular cutout 211. Referring to FIG. 6, FIG. 6 is a schematic diagram showing simulation results of reflection coefficients of a dl parameter of a reconfigurable dual-polarized broadband antenna of the present invention. As can be seen from Figure 6, independent tuning of fm3 can be achieved by adjusting the length dl of the vertical portion 32 of the L-shaped metal microstrip line. Referring to FIG. 7, FIG. 7 is a schematic diagram showing simulation results of reflection coefficients of a reconfigurable dual-polarized broadband antenna W4 parameter of the present invention. As can be seen from Figure 7, tuning of fml is accomplished by adjusting the length W4 of the fifth rectangular cutout 215.

Referring to FIG. 8, FIG. 8 is a schematic diagram showing the simulation results of the reflection coefficient of the LP3 parameter of the reconfigurable dual-polarized broadband antenna of the present invention. As can be seen in Figure 8, independent tuning of fpl can be achieved by adjusting the width LP3 of the second rectangular metal piece 512 of the axe monopole structure 50. Referring to FIG. 9, FIG. 9 is a schematic diagram showing the simulation results of the reflection coefficient of the S1 parameter of the new reconfigurable dual-polarized broadband antenna. As can be seen from Fig. 9, by adjusting the lower base length Sl of the equilateral trapezoidal metal piece 521 of the axicon monopole structure 50, independent tuning of fp2 can be achieved.

[0034] Referring to FIG. 10, FIG. 10 is a schematic diagram showing simulation results of reflection coefficients of a lumped capacitance parameter of a reconfigurable dual-polarized broadband antenna of the present invention. As can be seen from FIG. 10, by adjusting the size of the lumped capacitor 80, the frequency of f _P 2 can be reconstructed. As the lumped capacitor 80 increases, the resonant frequency fp2 decreases.

[0035] The reconfigurable dual-polarized broadband antenna of the present invention can realize the dual-polarized antenna by effectively adopting the orthogonal electric field mode of the stepped hollow-spaced slit resonance by setting the stepped hollow-spaced slit resonance, and the antenna design size can be sufficiently reduced. And form a high isolation between the two feed ports, so that the frequency of the two feed ports can be reconstructed and can be independently tuned.

The above is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, and the equivalent structure or equivalent function transformation made by the specification and the drawings of the present invention, or directly or indirectly In other related technical fields, the same is included in the scope of patent protection of the present invention.

Industrial applicability

[0037] The reconfigurable dual-polarized broadband antenna of the present invention can realize the dual-polarized antenna by using the stepped-type hollow-cavity resonance, effectively utilizing the orthogonal electric field mode of the stepped-type hollow-cavity resonance, and can sufficiently reduce the antenna design size. And form a high isolation between the two feed ports, so that the frequency of the two feed ports can be heavy Structure and can be independently tuned.

8

Claims

Claim

[Claim 1] A reconfigurable dual-polarized wideband antenna comprising a dielectric plate, a hollow metal sheet, an L-shaped metal microstrip line, a first SMA head, an axe monopole structure, and a second SMA head, The hollow metal sheet is attached to the upper surface of the dielectric plate, and the L-shaped metal microstrip line and the axe monopole structure are attached to the lower surface of the dielectric plate; Forming a stepped hollow slit on the metal sheet, wherein the stepped hollow gap is formed by sequentially connecting a first rectangular hollow, a second rectangular hollow, a third rectangular hollow, a fourth rectangular hollow, and a fifth rectangular hollow; the L-shaped metal a lateral portion of the microstrip line is parallel to a long side of a lower surface of the dielectric plate, and a vertical portion of the L-shaped metal microstrip line is perpendicular to a long side of a lower surface of the dielectric plate; the axe monopole The structure comprises a strip-shaped vertical portion and an axe-shaped transverse portion, the strip-shaped vertical portion of the axe-shaped monopole structure comprising a first rectangular metal piece and a second rectangular metal piece connected, the strip of the axe-shaped monopole structure a vertical portion perpendicular to a long side of a lower surface of the dielectric plate; The axe-shaped cross-section of the monopole structure includes an equilateral trapezoidal metal piece symmetrically disposed on both sides of the strip-shaped vertical portion of the axe-shaped monopole structure, the axe-shaped monopole structure being related to the dielectric plate The central axis of the wide side of the lower surface is symmetrical; the first SMA head is disposed on the dielectric plate, and the hollow metal piece is electrically connected to the ground end of the first SMA head, the L-shaped metal microstrip line and the first The feeding end of the SMA head is electrically connected; the second SMA head is disposed on the dielectric plate, and the axe monopole structure is electrically connected to the feeding end of the second SMA head, the hollow metal piece and the first The grounding end of the two SMA heads is electrically connected; the vertical portion of the L-shaped metal microstrip line extends to the bottom long side of the lower surface of the dielectric board, and the first SMA head is disposed on the L-shaped metal microstrip line Forming a first feed port on the dielectric plate at a position where the vertical portion intersects the long side of the bottom surface of the lower surface of the dielectric plate; the vertical portion of the axe monopole structure extends to the lower surface of the dielectric plate a top long side, the second SMA head is disposed on the vertical portion of the axe monopole structure and the dielectric plate a second feed port is formed on the dielectric plate at the intersection of the top and long sides of the lower surface; the reconfigurable dual-polarized broadband antenna further includes a pair of equilateral trapezoidal metal disposed on the axe monopole structure a metal pad on the upper end of the tip of the chip, the metal pad is provided with a via hole, the metal pad is grounded through the via hole, and the metal pad further passes through the lumped capacitance and the axe monopole The tip of the equilateral trapezoidal metal piece of the structure Pick up.

The reconfigurable dual-polarization broadband antenna according to claim 1, wherein the first rectangular hollow, the second rectangular hollow, the third rectangular hollow, the fourth rectangular hollow, and the fifth rectangular hollow wide side Parallel to the central axis of the broad side of the upper surface of the dielectric plate; the first rectangular hollow, the second rectangular hollow, the third rectangular hollow, the fourth rectangular hollow, and the fifth rectangular hollow are symmetric about the central axis of the broad side.

The reconfigurable dual-polarized broadband antenna according to claim 1, wherein the dielectric plate is a dielectric substrate of FR4, and the dielectric plate has a thickness of 0.8 mm and a dielectric constant of 4.4. The reconfigurable dual-polarized broadband antenna according to any one of the preceding claims, wherein the dielectric plate and the hollow metal sheet have a length of 74 mm, and the width of the dielectric plate and the hollow metal sheet is 106 mm; The length of the first rectangular hollow is 52 mm, the width of the first rectangular hollow is 44 mm; the length of the second rectangular hollow is 32 mm, the width of the second rectangular hollow is 6 mm; the length of the third rectangular hollow 6.7 mm, the width of the third rectangular hollow is 10.5 mm; the length of the fourth rectangular hollow is 2.6 mm, the width of the fourth rectangular hollow is 17.7 mm; the length of the fifth rectangular hollow is 9 6mm, the fifth rectangular hollow has a width of 1.5mm.

The reconfigurable dual-polarized wideband antenna according to claim 4, wherein a distance between a lower longitudinal edge of said stepped hollow slit and a lower longitudinal edge of said upper surface of said dielectric plate is 6.3 mm.

The reconfigurable dual-polarized broadband antenna according to claim 5, wherein the L-shaped metal microstrip line has a width of 1.32 mm, and the length of the lateral portion of the L-shaped metal microstrip line is

27.6 mm, the vertical length of the L-shaped metal microstrip line is 11.32 mm.

The three-mode wideband stepped slot antenna according to claim 6, wherein a distance between a vertical portion of the L-shaped metal microstrip line and a left wide side of a lower surface of the dielectric plate is 20.4 mm.

The reconfigurable dual-polarization broadband antenna according to claim 7, wherein the first rectangular metal piece of the axe monopole has a length of 2.5 mm, and the first rectangular metal

10 The width of the sheet is 36 mm; the length of the second rectangular metal piece of the axe monopole structure is 1 mm, the width of the second rectangular metal piece is 11 mm; the equilateral trapezoid of the axe monopole structure The length of the upper base of the metal piece is 2.5 mm, the length of the lower base of the equilateral trapezoidal metal piece is 16 mm, and the height of the equilateral trapezoidal metal piece is 6.75 mm.

[Claim 9] The reconfigurable dual-polarized broadband antenna according to claim 8, wherein a center point of the equilateral trapezoidal metal piece of the axe monopole structure and the axe monopole The vertical distance of the lower base of the first rectangular metal piece of the substructure is 9.8 mm.

11