WO2018184356A1

WO2018184356A1 - Axe-shaped dual-mode monopole antenna

Info

Publication number: WO2018184356A1
Application number: PCT/CN2017/101986
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: 2017-09-16
Publication date: 2018-10-11
Also published as: CN107093792A

Abstract

Disclosed by the present invention is an axe-shaped dual-mode monopole antenna, comprising a dielectric board, a hollowed-out metal plate, an axe-shaped monopole structure and a SubMiniature version A (SMA) connector, wherein the hollowed-out metal plate is attached on the upper surface of the dielectric board, and the axe-shaped monopole structure is attached to the lower surface of the dielectric board. Etched on the hollowed-out metal plate are stepped hollowed-out gaps. The axe-shaped monopole structure comprises a bar-shaped vertical part and an axe-shaped horizontal part, wherein the vertical part of the axe-shaped monopole structure is perpendicular to the long edge of the lower surface of the dielectric board. The axe-shaped horizontal part of the axe-shaped monopole structure comprises isosceles trapezoid metal plates which are provided symmetrically at both sides of the bar-shaped vertical part of the axe-shaped monopole structure. The SMA connector is provided on the dielectric board, wherein the axe-shaped monopole structure is electrically connected to the feed end of the SMA connector, and the hollowed-out metal plate is electrically connected to the grounding end of the SMA connector. The axe-shaped dual-mode monopole antenna in the present invention has two resonance modes that may be tuned independently.

Description

Axe dual mode monopole antenna

[0001] The present invention relates to the field of communications technologies, and in particular, to an axe-shaped dual-mode monopole 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. Prior art monopole antennas have two resonant modes, one resonant mode resulting from the longitudinal configuration of the monopole antenna and the other resonant mode being produced by the lateral configuration of the monopole antenna. At present, the monopole antenna design can effectively adjust the antenna frequency bandwidth by reasonably adjusting its horizontal and vertical dimensions. However, the current monopole antenna is basically difficult to effectively split the two resonance modes, and there is a technical problem that the two resonance modes cannot be independently tuned.

technical problem

The main object of the present invention is to provide an axe-shaped dual-mode monopole antenna, which aims to solve the technical problem that the existing monopole antenna cannot independently align the two resonance modes.

Problem solution

Technical solution

[0004] In order to achieve the above object, the present invention provides an axe-shaped dual-mode monopole antenna including a dielectric plate, a hollow metal sheet, an axe monopole structure and an SMA head, and the hollow metal sheet is attached to the The upper surface of the dielectric plate, the axe monopole structure is attached to the lower surface of the dielectric plate; the hollow metal piece is etched with a stepped hollow slit, and the stepped hollowing slit is hollowed out by the first rectangle a second rectangular hollow, a third rectangular hollow, a fourth rectangular hollow, and a fifth rectangular hollow connected in sequence; the axe monopole structure includes a strip vertical portion and an axe cross portion, the axe monopole The strip-shaped vertical portion of the structure includes a connected first rectangular metal piece and a second rectangular metal piece, the strip-shaped vertical portion of the axe-shaped monopole structure being perpendicular to a long side of a lower surface of the dielectric plate; The axe-shaped transverse portion 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 The broad side central axis of the lower surface of the dielectric plate is symmetrical; the SMA head is disposed on the dielectric plate, and the axe monopole structure is electrically connected to the feeding end of the SMA head, the hollow metal piece and the SMA The ground terminal of the head is electrically connected.

[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.

[0009] 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.

[0010] 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

[0011] Compared with the prior art, the axe-type dual-mode monopole antenna of the present invention has an axe-type monopole structure, because of the coupling area of the axe-shaped cross-section of the axe-shaped monopole structure and the radio frequency ground. Small, and the axe The axe-shaped transverse portion of the pole structure is effectively isolated from the strip-shaped vertical portion of the axe-shaped monopole structure, and two resonant modes are independently tuned.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a preferred embodiment of an axe-type dual-mode monopole antenna according to the present invention;

2 is a schematic structural view of a preferred embodiment of a hollow metal sheet of an axe-type dual-mode monopole antenna of the present invention;

3 is a schematic structural view of a preferred embodiment of an axe-shaped monopole structure of an axe-type dual-mode monopole antenna according to the present invention;

4 is a schematic diagram showing simulation results of reflection coefficients of an axe-type dual-mode monopole antenna of the present invention;

5 is a schematic diagram showing simulation results of reflection coefficients of LP3 parameters of the axe-type dual-mode monopole antenna of the present invention;

6 is a schematic diagram showing simulation results of reflection coefficients of the S1 parameter of the axe-type dual-mode monopole antenna of the present invention.

[0018] The objects, features, and advantages of the invention will be described in conjunction with the embodiments of the invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and utilities 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 schematic plan view showing a preferred embodiment of an axe-type dual-mode monopole antenna according to the present invention. In the present embodiment, the axe-shaped dual-mode monopole antenna 1 includes a dielectric plate 10, a hollow metal sheet 20, an axe monopole structure 50, and an SMA (Sub-Miniature-A) head 60. The axe-shaped dual-mode monopole antenna 1 has a rectangular parallelepiped structure (only a schematic plan view is shown in FIG. 1), and the hollow metal piece 20 and the axe-shaped monopole structure 50 are both 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 SMA head 60 is a coaxial connector. The hollow metal sheet 20 is attached to the upper surface of the dielectric plate 10, and the axe monopole structure 50 is attached to the lower surface of the dielectric plate 10. The hollow metal sheet 20 is etched with a step. a hollowing slit 21, the stepped hollowing 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 moment The shape hollow 215 is connected in sequence; 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 to be joined a strip 511 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 sheet 10; the axe-shaped cross-section of the axe-shaped monopole structure The portion 52 includes an equilateral trapezoidal metal piece 521 symmetrically disposed on both sides of the strip-shaped vertical portion 51 of the axe-shaped monopole structure, the width of the axe-shaped monopole structure 50 with respect to the lower surface of the dielectric plate 10 The SMA head 60 is disposed on the dielectric plate 10, and the axe monopole structure 50 is electrically connected to the feeding end of the SMA head 60, and the hollow metal piece 20 and the SMA head 60 are The ground terminal is electrically connected.

[0021] As a preferred embodiment of the present invention, the vertical portion 51 of the axe monopole structure extends to the top long side of the lower surface of the dielectric plate 10, and the SMA head 60 is disposed on the axe monopole A first feed port is formed on the dielectric plate 10 at a position where the vertical portion 51 of the structure intersects the top long side of the lower surface of the dielectric plate 10.

[0022] The axe-type dual-mode monopole antenna of the present invention has an axe-type monopole structure, and the coupling area of the axe-shaped cross-section of the axe-shaped monopole structure and the radio frequency ground is small, and the axe The axe-shaped transverse portion of the monopole structure can be effectively isolated from the strip-shaped vertical portion of the axe-shaped monopole structure, and two resonant modes are independently tuned.

Referring to FIG. 2, FIG. 2 is a schematic structural view of a preferred embodiment of a hollow metal sheet of an axe-type dual-mode monopole antenna. In this embodiment, the wide sides of the first rectangular hollow 211, the second rectangular hollow 212, the third rectangular hollow 2 13 , the fourth rectangular hollow 214 and the fifth rectangular hollow 215 and 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, the third rectangular hollow 213, the fourth rectangular hollow 214, and the fifth rectangular hollow 214 are symmetrical about the broad side central axis.

[0024] 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 W0 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 longitudinal edge of the stepped hollow slit 21 and the lower longitudinal edge 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 axe-shaped monopole structure of an axe-shaped dual-mode monopole antenna. 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 The length WP3 of the metal piece 512 is 1 mm, the width of the second rectangular metal piece 512 is 11 mm, and the length of the upper base S2 of the equilateral trapezoidal metal piece 521 of the axe-shaped monopole structure 50 is 2.5 mm. The lower base length S1 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.

Referring to FIG. 4, FIG. 4 is a schematic diagram showing simulation results of reflection coefficients of an axe-type dual-mode monopole antenna of the present invention.

As can be seen from FIG. 4, the reflection coefficient of the axe-shaped dual-mode monopole antenna 1 is below -10 dB, and the operating frequency can cover 1.15 GHz to 2.99 GHz, realizing two resonance modes of fpl and fp2. Referring to FIG. 5, FIG. 5 is a schematic diagram showing simulation results of reflection coefficients of the axe-type dual-mode monopole antenna LP3 parameters of the present invention. As can be seen in Figure 5, 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. 6, FIG. 6 is a schematic diagram showing simulation results of reflection coefficients of the axe-type dual-mode monopole antenna S1 of the present invention. As can be seen from Fig. 6, by adjusting the lower base length S1 of the equilateral trapezoidal metal piece 521 of the axicon monopole structure 50, independent tuning of f _P 2 can be achieved.

[0027] The axe-shaped dual-mode monopole antenna of the present invention is provided with an axe-type monopole structure, by providing an axe-type monopole structure, due to the axe-shaped cross-section of the axe-shaped monopole structure and the radio frequency ground The coupling area is small, and the axe-shaped lateral portion of the axe-shaped monopole structure and the strip-shaped vertical portion of the axe-shaped monopole structure can be effectively isolated, and two resonance modes are independently tuned.

[0028]

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent function transformations made by the description of the invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Industrial applicability

[0030] Compared with the prior art, the axe-type dual-mode monopole antenna of the present invention has an axe-type monopole structure, because of the coupling area of the axe-shaped cross-section of the axe-shaped monopole structure and the radio frequency ground. Small, and the axe-shaped lateral portion of the axe-shaped monopole structure and the strip-shaped vertical portion of the axe-shaped monopole structure can be effectively isolated, thereby realizing

Claims

Claim

[Attach 1] An axe-shaped dual-mode monopole antenna comprising a dielectric plate, a hollow metal sheet, an axe monopole structure, and an SMA head, wherein: the hollow metal sheet is attached to the dielectric sheet The upper surface, the axe-shaped monopole structure is attached to the lower surface of the dielectric plate; the hollow metal piece is etched with a stepped hollow slit, and the stepped hollowing slit is hollowed out by the first rectangle, the second a rectangular hollow, a third rectangular hollow, a fourth rectangular hollow, and a fifth rectangular hollow are sequentially connected; the axe monopole structure includes a strip vertical portion and an axe horizontal portion, and the axe monopole structure strip The vertical portion includes a connected first rectangular metal piece and a second rectangular metal piece, the strip vertical portion of the axe monopole structure being perpendicular to a long side of a lower surface of the dielectric plate; the axe monopole The axe-shaped transverse portion of the substructure includes an equilateral trapezoidal metal piece symmetrically disposed on opposite sides of the strip-shaped vertical portion of the axe monopole structure, the axe-shaped monopole structure being related to a lower surface of the dielectric plate The broad side central axis is symmetrical; the SMA head And disposed on the dielectric plate, the axe monopole structure is electrically connected to a feeding end of the SMA head, and the hollow metal piece is electrically connected to a ground end of the SMA head.

[Attachment 2] The axe-shaped dual-mode monopole 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 a hollow wide side parallel to a broad side central axis 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 with respect to the wide side The central axis is symmetrical.

The axe-shaped dual-mode monopole 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 axe-shaped dual-mode monopole antenna according to any one of claims 1 to 3, wherein the dielectric plate and the hollow metal piece have a length of 74 mm, and the dielectric plate and the hollow metal The width 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, and the width of the second rectangular hollow is 6 mm; The third rectangular hollow has a length of 6.7 mm, the third rectangular hollow has a width of 10.5 mm; the fourth rectangular hollow has a length of 2.6 mm, and the fourth rectangular hollow has a width of 17.7 mm; The length of the fifth rectangular cutout is 9.6m m, the fifth rectangular hollow has a width of 1.5 mm.

[Attachment 5] The axe-shaped dual-mode monopole antenna according to claim 4, wherein a distance between a lower side of the stepped hollow gap and a lower side of the upper surface of the dielectric plate is 6.3mm.

[Attachment 6] The axe-shaped dual-mode monopole antenna according to claim 5, wherein the first rectangular metal piece of the axe-shaped monopole has a length of 2.5 mm, the first rectangle The width of the metal piece 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 trapezoidal shape 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.

[Attachment 7] The axe-shaped dual-mode monopole antenna according to claim 6, wherein a center point of the equilateral trapezoidal metal piece of the axe-shaped monopole structure and the axe-shaped monopole The vertical distance of the lower base of the first rectangular metal piece of the structure is 9.8 mm.