Ultra-wideband directive planar antenna

Abstract

The application discloses a kind of ultra-wideband directivity plane antennas, it is related to the technical field of radio, including dielectric plate, metal radiation patch, microstrip line, metal through hole and feed connector;The metal radiation patch is arranged in the front of dielectric plate, and microstrip line is arranged in the back of dielectric plate;The metal through hole is through the front and back of dielectric plate, connects metal radiation patch and microstrip line;The feed connector includes center feed needle and outer conductor, the center feed needle is connected with metal radiation patch, and the outer conductor is connected with microstrip line.The application has ultra-wideband operating range and directional radiation characteristics, can maintain good directional radiation characteristics at high frequency, has higher gain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radio, more particularly, to an ultra-wideband directional planar antenna. BACKGROUND

[0002] Although the existing ultra-wideband antenna realizes ultra-wideband operation, its radiation pattern is split at high frequencies, so that the directivity of the antenna radiation is poor and the gain is low in the high frequency range.

[0003] The prior art discloses a logarithmic-periodic monopole antenna, comprising an antenna plate and a feed line plate, the antenna plate is vertically arranged on the feed line plate, a microstrip feed line is arranged on the contact line of the feed line plate and the antenna plate, and a copper layer is arranged on the back of the feed line plate and serves as a feed line ground; the antenna plate is printed with a plurality of parallel monopoles connected perpendicularly to the microstrip feed line, the monopole is a metal strip, and the length, width and spacing of adjacent monopoles are scaled proportionally; the application has a plurality of parallel monopoles printed on the antenna plate and connected perpendicularly to the microstrip feed line, the length, width and spacing of adjacent monopoles are scaled proportionally, and has impedance matching characteristics and directional radiation characteristics to a certain extent, but its radiation pattern is split at high frequencies, so that the directivity is poor and the gain is low in the high frequency range. SUMMARY

[0004] In order to overcome the poor directivity of the existing ultra-wideband antenna in the high frequency range, the present application provides an ultra-wideband directional planar antenna, which has an ultra-wideband operating range and directional radiation characteristics, can maintain good directional radiation characteristics in the high frequency range, and has a high gain.

[0005] To solve the above technical problems, the technical scheme of the present application is as follows:

[0006] The present application discloses an ultra-wideband directional planar antenna, comprising a dielectric plate, a metal radiation patch, a microstrip line, a metal through hole and a feed connector.

[0007] The metal radiation patch is arranged on the front surface of the dielectric plate, and the microstrip line is arranged on the back surface of the dielectric plate; the metal through hole penetrates the front and back surfaces of the dielectric plate and connects the metal radiation patch and the microstrip line.

[0008] The feed connector comprises a center feed pin and an outer conductor, the center feed pin is connected with the metal radiation patch, and the outer conductor is connected with the microstrip line.

[0009] Preferably, the dielectric plate is square with a side length of a millimeters.

[0010] Preferably, the metal radiation patch comprises a first metal radiation patch part and a second metal radiation patch part which are structurally identical; the first metal radiation patch part and the second metal radiation patch part are symmetrically arranged with a straight line where the midpoints of opposite sides of the dielectric plate are connected as the axis of symmetry, and the side perpendicular to the axis of symmetry is the bottom side of the dielectric plate;

[0011] The first metal radiation patch part and the second metal radiation patch part each comprise a 90° sector metal patch, a first strip-shaped metal patch, and a second strip-shaped metal patch;

[0012] The vertex of the 90° sector metal patch coincides with the vertex of the dielectric plate, the first straight angle side of the 90° sector metal patch coincides with the bottom side of the dielectric plate, the second straight angle side of the 90° sector metal patch coincides with the adjacent side of the bottom side of the dielectric plate, and the radius of the 90° sector metal patch is less than a / 2 mm;

[0013] One end of the first strip-shaped metal patch and one end of the second strip-shaped metal patch overlap and are arranged on the first straight angle side of the 90° sector metal patch, and the end point of one end coincides with the intersection point of the first straight angle side and the arc side of the 90° sector metal patch;

[0014] The included angle between the first strip-shaped metal patch and the first straight angle side of the 90° sector metal patch is referred to as a first included angle, the included angle between the second strip-shaped metal patch and the first straight angle side of the 90° sector metal patch is referred to as a second included angle, and the first included angle and the second included angle are not equal.

[0015] Preferably, the lengths of the first strip-shaped metal patch and the second strip-shaped metal patch are not equal.

[0016] Preferably, the length of the first strip-shaped metal patch is less than the length of the second strip-shaped metal patch.

[0017] Preferably, the first included angle is less than the second included angle.

[0018] Preferably, the first included angle ranges from [65 ° to 75 ° ).

[0019] Preferably, the second included angle ranges from [75 ° to 85 ° .

[0020] Preferably, the microstrip line comprises a 50-ohm microstrip line and an impedance matching microstrip line;

[0021] The 50-ohm microstrip line is rectangular, and the impedance matching microstrip line is trapezoidal;

[0022] One short side of the 50-ohm microstrip line coincides with the adjacent side of the bottom edge of the dielectric plate, and the other short side of the 50-ohm microstrip line is connected with the lower bottom edge of the impedance matching microstrip line, and the upper bottom edge of the impedance matching microstrip line is connected with the metal through hole.

[0023] The outer conductor of the feed connector is connected with the 50-ohm microstrip line.

[0024] Preferably, the length of the short side of the 50-ohm microstrip line is equal to the length of the lower bottom edge of the impedance matching microstrip line.

[0025] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0026] The present application sets a metal radiation patch and a microstrip line on the front and back of the dielectric plate respectively, the metal connects the metal radiation patch and the microstrip line through the dielectric plate, the center feeding needle of the feed connector is connected with the metal radiation patch, and the outer conductor of the feed connector is connected with the microstrip line. The metal radiation patch of the present application improves the high-frequency radiation pattern of the antenna, has an ultra-wideband working range and directional radiation characteristics, can maintain good directional radiation characteristics at high frequencies, and has a higher gain. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Front view of an ultra-wideband directional planar antenna according to embodiment 1.

[0028] Figure 2 Back view of an ultra-wideband directional planar antenna according to embodiment 1.

[0029] Figure 3 Front view of an ultra-wideband directional planar antenna according to embodiment 2.

[0030] Figure 4 Back view of an ultra-wideband directional planar antenna according to embodiment 2.

[0031] Figure 5 Comparison of the antenna radiation pattern of the ultra-wideband directional planar antenna according to embodiment 4 with the planar antenna without a strip-shaped metal patch and the planar antenna with a group of strip-shaped metal patches at 2g frequency point.

[0032] Figure 6 Comparison of the antenna radiation pattern of the ultra-wideband directional planar antenna according to embodiment 4 with the planar antenna without a strip-shaped metal patch and the planar antenna with a group of strip-shaped metal patches at 6g frequency point.

[0033] Figure 7The antenna radiation pattern comparison chart of the ultra-wideband directional planar antenna described in embodiment 4 and the planar antenna without strip metal patch and the planar antenna with a group of strip metal patches at 10g frequency point.

[0034] Figure 8 The S parameter characteristic diagram of an ultra-wideband directional planar antenna described in embodiment 4. DETAILED DESCRIPTION

[0035] The drawings are only used for illustrative description and cannot be understood as limiting the patent;

[0036] In order to better illustrate the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size;

[0037] It is understandable for those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0038] The technical solutions of the present application will be further described below in combination with the drawings and embodiments.

[0039] Embodiment 1

[0040] The present embodiment discloses an ultra-wideband directional planar antenna, as shown in Figure 1 and Figure 2 , comprising a dielectric plate 1, a metal radiation patch 2, a microstrip line 3, a metal through hole 4 and a feed connector 5;

[0041] The metal radiation patch 2 is arranged on the front surface of the dielectric plate 1, and the microstrip line 3 is arranged on the back surface of the dielectric plate 1;

[0042] The metal through hole 4 penetrates through the front and back surfaces of the dielectric plate 1 and connects the metal radiation patch 2 and the microstrip line 3;

[0043] The center feed pin of the feed connector 5 is connected with the metal radiation patch 2, and the outer conductor of the feed connector 5 is connected with the microstrip line 3.

[0044] In the specific implementation process, the present embodiment arranges the metal radiation patch 2 and the microstrip line 3 on the front and back surfaces of the dielectric plate 1 respectively, the metal through hole 4 penetrates through the dielectric plate 1 to connect the metal radiation patch 2 and the microstrip line 3, the center feed pin of the feed connector 5 is connected with the metal radiation patch 2, and the outer conductor of the feed connector 5 is connected with the microstrip line 3. The metal radiation patch 2 of the present embodiment improves the high-frequency radiation pattern of the antenna, has an ultra-wideband working range and directional radiation characteristics, can maintain good directional radiation characteristics at high frequency, and has higher gain.

[0045] Embodiment 2

[0046] The present embodiment discloses an ultra-wideband directional planar antenna, as shown inFigure 3 and Figure 4 As shown in the figure, it comprises a dielectric plate 1, a metal radiation patch 2, a microstrip line 3, a metal via 4 and a feed terminal 5;

[0047] The dielectric plate 1 is square with a side length of a millimeters;

[0048] The metal radiation patch 2 is arranged on the front surface of the dielectric plate 1, and the microstrip line 3 is arranged on the back surface of the dielectric plate 1;

[0049] The metal radiation patch 2 comprises a first metal radiation patch part and a second metal radiation patch part with the same structure; the first metal radiation patch part and the second metal radiation patch part are symmetrically arranged with a straight line where the midpoints of opposite sides of the dielectric plate 1 are connected as the axis of symmetry, and the side perpendicular to the axis of symmetry is the bottom side of the dielectric plate 1;

[0050] The first metal radiation patch part and the second metal radiation patch part each comprise a 90° sector metal patch 21, a first strip metal patch 22 and a second strip metal patch 23;

[0051] The vertex of the 90° sector metal patch 21 coincides with the vertex of the dielectric plate 1, the first straight angle side of the 90° sector metal patch 21 coincides with the bottom side of the dielectric plate 1, the second straight angle side of the 90° sector metal patch 21 coincides with the adjacent side of the bottom side of the dielectric plate 1, and the radius of the 90° sector metal patch 21 is less than a / 2 millimeters;

[0052] One end of the first strip metal patch 22 and one end of the second strip metal patch 23 overlap and are arranged on the first straight angle side of the 90° sector metal patch 21, and the end point of one end coincides with the intersection point of the first straight angle side and the arc side of the 90° sector metal patch 21;

[0053] The included angle between the first strip metal patch 22 and the first straight angle side of the 90° sector metal patch 21 is denoted as the first included angle, the included angle between the second strip metal patch 23 and the first straight angle side of the 90° sector metal patch 21 is denoted as the second included angle, and the first included angle and the second included angle are not equal;

[0054] The first included angle is smaller than the second included angle, the angle of the first included angle is 65 ° , and the angle of the second included angle is 75 ° .

[0055] The lengths of the first strip metal patch 22 and the second strip metal patch 23 are not equal;

[0056] The length of the first strip metal patch 22 is smaller than the length of the second strip metal patch 23;

[0057] The microstrip line 3 comprises a 50-ohm microstrip line 31 and an impedance matching microstrip line 32;

[0058] The 50-ohm microstrip line 31 is rectangular, and the impedance matching microstrip line 32 is trapezoidal;

[0059] One short side of the 50-ohm microstrip line 31 coincides with the adjacent side of the bottom side of the dielectric plate 1, the other short side of the 50-ohm microstrip line 31 is connected with the lower base of the impedance matching microstrip line 32, and the upper base of the impedance matching microstrip line 32 is connected with the metal via hole 4;

[0060] The length of the short side of the 50-ohm microstrip line 31 is equal to the length of the lower base of the impedance matching microstrip line 32;

[0061] The metal via hole 4 penetrates the front surface and the back surface of the dielectric plate 1, and connects the metal radiating patch 2 and the impedance matching microstrip line 32;

[0062] The center feeding pin of the feeding connector 5 is connected with the metal radiating patch 2, and the outer conductor of the feeding connector 5 is connected with the 50-ohm microstrip line 31.

[0063] Embodiment 3

[0064] The embodiment discloses an ultra-wideband directional planar antenna, which comprises a dielectric plate 1, a metal radiating patch 2, a microstrip line 3, a metal via hole 4, and a feeding connector 5;

[0065] The dielectric plate 1 is square with a side length of a millimeters;

[0066] The metal radiating patch 2 is arranged on the front surface of the dielectric plate 1, and the microstrip line 3 is arranged on the back surface of the dielectric plate 1;

[0067] The metal radiating patch 2 comprises a first metal radiating patch part and a second metal radiating patch part which are the same in structure; the first metal radiating patch part and the second metal radiating patch part are symmetrically arranged with a straight line where the midpoints of opposite sides of the dielectric plate 1 are connected as a symmetric axis, and the bottom side of the dielectric plate 1 is perpendicular to the symmetric axis;

[0068] The first metal radiating patch part and the second metal radiating patch part each comprise a 90° sector metal patch 21, a first strip metal patch 22, and a second strip metal patch 23;

[0069] The vertex of the 90° sector metal patch 21 coincides with the vertex of the dielectric plate 1, the first straight angle side of the 90° sector metal patch 21 coincides with the bottom side of the dielectric plate 1, the second straight angle side of the 90° sector metal patch 21 coincides with the adjacent side of the bottom side of the dielectric plate 1, and the radius of the 90° sector metal patch 21 is less than a / 2 millimeters;

[0070] One end of the first strip-shaped metal patch 22 and one end of the second strip-shaped metal patch 23 overlap and are arranged on the first right-angle side of the 90° sector-shaped metal patch 21, and the end point of one end coincides with the intersection point of the first right-angle side and the arc side of the 90° sector-shaped metal patch 21;

[0071] The included angle between the first strip-shaped metal patch 22 and the first right-angle side of the 90° sector-shaped metal patch 21 is referred to as a first included angle, the included angle between the second strip-shaped metal patch 23 and the first right-angle side of the 90° sector-shaped metal patch 21 is referred to as a second included angle, and the first included angle and the second included angle are not equal;

[0072] The first included angle is smaller than the second included angle, the angle of the first included angle is 74°, and the angle of the second included angle is 85°. ° ° .

[0073] The lengths of the first strip-shaped metal patch 22 and the second strip-shaped metal patch 23 are not equal;

[0074] The length of the first strip-shaped metal patch 22 is smaller than the length of the second strip-shaped metal patch 23;

[0075] The microstrip line 3 includes a 50-ohm microstrip line 31 and an impedance matching microstrip line 32;

[0076] The 50-ohm microstrip line 31 is rectangular, and the impedance matching microstrip line 32 is trapezoidal;

[0077] One short side of the 50-ohm microstrip line 31 coincides with the adjacent side of the bottom side of the dielectric plate 1, the other short side of the 50-ohm microstrip line 31 is connected with the lower base of the impedance matching microstrip line 32, and the upper base of the impedance matching microstrip line 32 is connected with the metal via hole 4;

[0078] The length of the short side of the 50-ohm microstrip line 31 is equal to the length of the lower base of the impedance matching microstrip line 32;

[0079] The metal via hole 4 penetrates the front surface and the back surface of the dielectric plate 1 and connects the metal radiation patch 2 and the impedance matching microstrip line 32;

[0080] The center feeding needle of the feeding connector 5 is connected with the metal radiation patch 2, and the outer conductor of the feeding connector 5 is connected with the 50-ohm microstrip line 31.

[0081] Embodiment 4

[0082] The embodiment discloses an ultra-wideband directional planar antenna, which comprises a dielectric plate 1, a metal radiation patch 2, a microstrip line 3, a metal via hole 4 and a feeding connector 5;

[0083] The dielectric plate 1 is square with a side length of a millimeters;​

[0084] The metal radiation patch 2 is arranged on the front surface of the dielectric plate 1, and the microstrip line 3 is arranged on the back surface of the dielectric plate 1;

[0085] The metal radiation patch 2 comprises a first metal radiation patch part and a second metal radiation patch part which are symmetrically arranged with the straight line where the connecting line of the midpoints of the opposite sides of the dielectric plate 1 as the axis of symmetry, and the side perpendicular to the axis of symmetry is the bottom side of the dielectric plate 1;

[0086] The first metal radiation patch part and the second metal radiation patch part each comprise a 90° sector metal patch 21, a first strip metal patch 22 and a second strip metal patch 23;

[0087] The vertex of the 90° sector metal patch 21 coincides with the vertex of the dielectric plate 1, the first straight angle side of the 90° sector metal patch 21 coincides with the bottom side of the dielectric plate 1, the second straight angle side of the 90° sector metal patch 21 coincides with the adjacent side of the bottom side of the dielectric plate 1, and the radius of the 90° sector metal patch 21 is less than a / 2 mm;

[0088] One end of the first strip metal patch 22 and one end of the second strip metal patch 23 overlap and are arranged on the first straight angle side of the 90° sector metal patch 21, and the end point of one end coincides with the intersection point of the first straight angle side and the arc side of the 90° sector metal patch 21;

[0089] The included angle between the first strip metal patch 22 and the first straight angle side of the 90° sector metal patch 21 is referred to as a first included angle, the included angle between the second strip metal patch 23 and the first straight angle side of the 90° sector metal patch 21 is referred to as a second included angle, and the first included angle and the second included angle are not equal;

[0090] The first included angle is smaller than the second included angle, the angle of the first included angle is 72°, and the angle of the second included angle is 80°. ° ° .

[0091] The lengths of the first strip metal patch 22 and the second strip metal patch 23 are not equal;

[0092] The length of the first strip metal patch 22 is smaller than the length of the second strip metal patch 23;

[0093] The microstrip line 3 comprises a 50-ohm microstrip line 31 and an impedance matching microstrip line 32;

[0094] The 50-ohm microstrip line 31 is rectangular, and the impedance matching microstrip line 32 is trapezoidal; ​

[0095] One short side of the 50-ohm microstrip line 31 coincides with the adjacent side of the bottom edge of the dielectric plate 1, and the other short side of the 50-ohm microstrip line 31 is connected with the lower bottom edge of the impedance matching microstrip line 32, and the upper bottom edge of the impedance matching microstrip line 32 is connected with the metal via hole 4;

[0096] The length of the short side of the 50-ohm microstrip line 31 is equal to the length of the lower bottom edge of the impedance matching microstrip line 32;

[0097] The metal via hole 4 penetrates the front surface and the back surface of the dielectric plate 1, and connects the metal radiating patch 2 and the impedance matching microstrip line 32;

[0098] The center feeding needle of the feeding connector 5 is connected with the metal radiating patch 2, and the outer conductor of the feeding connector 5 is connected with the 50-ohm microstrip line 31.

[0099] In the specific implementation process, the side length of the dielectric plate 1 is 242mm, the radius of the 90° sector metal patch 21 is 120mm, the length of the first strip-shaped metal patch 22 is 195mm, and the length of the second strip-shaped metal patch 23 is 225mm;

[0100] Figure 5 、 Figure 6 、 Figure 7 respectively, are the antenna radiation pattern comparison diagrams of the antenna of the present embodiment, the planar antenna not containing strip-shaped metal patches, and the planar antenna containing a group of strip-shaped metal patches at 2g frequency points, 6g frequency points, and 10g frequency points. The inclination angle of the planar antenna containing a group of strip-shaped metal patches is 72°. From Figure 5 、 Figure 6 、 Figure 7 It can be seen from the above that the two groups of strip-shaped metal patches of the present embodiment improve the directional radiation characteristics of the antenna, and the improvement effect is more obvious at high frequencies. Compared with the planar antenna not containing strip-shaped metal patches and the planar antenna containing a group of strip-shaped metal patches, the main polarization direction radiation ability is improved by 4dB at 6g and 10g frequency points. Figure 8 is the S parameter characteristics of the antenna of the present embodiment. From the figure, it can be seen that the working range of the antenna of the present embodiment covers the entire frequency band of 0.5G-20G. Therefore, by adding two groups of strip-shaped metal patches, the antenna can work in a super wide bandwidth range, and at the same time has good directional radiation characteristics.

[0101] The same or similar reference signs correspond to the same or similar parts;

[0102] The terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent;

[0103] Obviously, the above embodiments of the present application are merely exemplary but not intended to limit the embodiments of the present application. Based on the above description, any other variations or changes can be made by those skilled in the art without departing from the spirit and principles of the present application. It is not necessary to list all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall fall within the scope of the claims of the present application.

Claims

1. An ultra-wideband directive planar antenna, characterized by, The antenna comprises a dielectric plate (1), a metal radiation patch (2), a microstrip line (3), a metal via (4) and a feed connector (5); The metal radiation patch (2) is arranged on the front surface of the dielectric plate (1), and the microstrip line (3) is arranged on the back surface of the dielectric plate (1); The metal via (4) penetrates through the front surface and the back surface of the dielectric plate (1) and connects the metal radiation patch (2) and the microstrip line (3); The center feed pin of the feed connector (5) is connected with the metal radiation patch (2), and the outer conductor of the feed connector (5) is connected with the microstrip line (3); The dielectric plate (1) is square-shaped, and the side length is a millimeter; The metal radiation patch (2) comprises a first metal radiation patch part and a second metal radiation patch part which are symmetrical to each other with the straight line where the midpoints of the opposite sides of the dielectric plate (1) are connected as the axis of symmetry, and the side perpendicular to the axis of symmetry is the bottom side of the dielectric plate (1); The first metal radiation patch part and the second metal radiation patch part each comprise a 90° sector metal patch (21), a first strip metal patch (22) and a second strip metal patch (23); The vertex of the 90° sector metal patch (21) coincides with the vertex of the dielectric plate (1), the first straight angle side of the 90° sector metal patch (21) coincides with the bottom side of the dielectric plate (1), the second straight angle side of the 90° sector metal patch (21) coincides with the adjacent side of the bottom side of the dielectric plate (1), and the radius of the 90° sector metal patch (21) is smaller than a / 2 millimeter; One end of the first strip metal patch (22) and one end of the second strip metal patch (23) overlap and are arranged on the first straight angle side of the 90° sector metal patch (21), and the end point of one end coincides with the intersection point of the first straight angle side and the arc side of the 90° sector metal patch (21); The included angle between the first strip metal patch (22) and the first straight angle side of the 90° sector metal patch (21) is defined as the first included angle, the included angle between the second strip metal patch (23) and the first straight angle side of the 90° sector metal patch (21) is defined as the second included angle, and the first included angle and the second included angle are not equal.

2. The ultra-wideband directive planar antenna of claim 1, wherein, The lengths of the first strip metal patch (22) and the second strip metal patch (23) are not equal.

3. The ultra-wideband directive planar antenna of claim 2, wherein, The length of the first strip metal patch (22) is smaller than the length of the second strip metal patch (23).

4. The ultra-wideband directive planar antenna of claim 1, wherein, The first included angle is smaller than the second included angle.

5. The ultra-wideband directive planar antenna of claim 4, wherein, the first included angle is in the range of .

6. The ultra-wideband directive planar antenna of claim 5, wherein, The second included angle ranges from 0.5 to 2.5 degrees. .

7. The ultra-wideband directive planar antenna of claim 1, wherein, The microstrip line (3) comprises a 50-ohm microstrip line (31) and an impedance matching microstrip line (32); The 50-ohm microstrip line (31) is rectangular, and the impedance matching microstrip line (32) is trapezoidal; One short side of the 50-ohm microstrip line (31) coincides with the adjacent side of the bottom side of the dielectric plate (1), the other short side of the 50-ohm microstrip line (31) is connected with the lower base of the impedance matching microstrip line (32), and the upper base of the impedance matching microstrip line (32) is connected with the metal via (4); The outer conductor of the feed connector (5) is connected with the 50-ohm microstrip line (31).

8. The ultra-wideband directive planar antenna of claim 7, wherein, The length of the short side of the 50-ohm microstrip line (31) is equal to the length of the lower bottom side of the impedance matching microstrip line (32).

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