WO2018188302A1

WO2018188302A1 - High-gain filter antenna

Info

Publication number: WO2018188302A1
Application number: PCT/CN2017/107194
Authority: WO
Inventors: 曲美君; 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: 2017-04-15
Filing date: 2017-10-21
Publication date: 2018-10-18
Also published as: CN206619694U

Abstract

Disclosed in the present utility model is a high-gain filter antenna. The high-gain filter antenna comprises an upper surface and a lower surface; the upper surface comprises a first microstrip line, a rectangular resonant ring, and a second microstrip line; the lower surface comprises a ground surface, a third microstrip line, a fourth microstrip line, and a fifth microstrip line. According to the present utility model, by providing a rectangular resonant ring in an existing antenna, the antenna in the present utility model has a good filtering performance; by forming a reflector by means of the ground surface, the antenna in the present utility model has a good radiation performance; by providing a fifth microstrip line at the other side of a dipole to form a director, the antenna gain is further improved; by providing a triangular notch at a connection part of the third microstrip antenna, the signal matching degree is improved.

Description

High gain filter antenna

Technical field

[0001] The present invention relates to the field of radio frequency microwave communication technologies, and in particular, to a high gain filter antenna.

Background technique

[0002] With the rapid development of wireless communication and electronic technology, electronic devices in a system need to meet a variety of needs. In most wireless communication systems, the filter is typically connected directly to the input or output port of the antenna. Filters and antennas are two of the larger critical components, usually designed separately, but when the filter is cascaded with the antenna, the impedance is often mismatched. This requires the introduction of additional matching circuits for impedance matching, which in turn complicates the system and increases the weight, size and loss of the system. Therefore, it is very important to integrate the filter and the antenna to ensure its radiation characteristics, filtering characteristics, high gain and signal matching to form a filter antenna.

[0003] However, existing filter integrated antennas cannot simultaneously ensure good radiation characteristics, filtering characteristics, high gain, and signal matching.

technical problem

[0004] The main object of the present invention is to provide a high-gain filter antenna, which aims to solve the problem that the existing filter integrated antenna cannot ensure good radiation characteristics, filtering characteristics, high gain, and signal matching technical problems.

Technical solution

In order to achieve the above object, the present invention provides a high gain filter antenna, wherein the high gain filter antenna includes an upper surface and a lower surface, and the upper surface and the lower surface are both printed on a dielectric board, The upper surface includes a first microstrip line, a rectangular resonant ring, and a second microstrip line, the rectangular resonant ring being disposed between the first microstrip line and the second microstrip line; Upper surface metal via;

[0006] The lower surface includes a ground, a third microstrip line, a fourth microstrip line, and a fifth microstrip line; one end of the third microstrip line is disposed as a funnel type, and the third microstrip line The other end is disposed in a rectangular shape and is connected with the lower bottom end of the funnel type to form a connecting portion, the connecting portion is provided with a triangular notch; the fourth microstrip The line is disposed on the same line as the other end of the third microstrip line; the fourth microstrip line is provided with a lower surface metal via that matches the upper surface metal via;

[0007] The upper surface and the lower surface of the antenna are connected through the upper surface metal via and the lower surface metal via through a metal copper pillar, such that the second microstrip line, the third microstrip line, and the fourth The microstrip lines together form a dipole;

[0008] The fifth microstrip line is disposed on a right side of the third microstrip line and the fourth microstrip line to form a guide.

[0009] Preferably, the first microstrip line and the second microstrip line are both "L-shaped" structures, both including a lateral end and a vertical mountain.

[0010] Preferably, the upper surface metal via is disposed at a lateral end of the second microstrip line away from an end of the rectangular resonant ring.

[0011] Preferably, the lower surface metal via is disposed at a position adjacent to an end of the third microstrip line connecting portion corresponding to the upper surface metal via.

[0012] Preferably, a vertical end of the first microstrip line and a vertical end of the second microstrip line are respectively disposed in parallel with a long side of the rectangular resonant ring, and a lateral end of the first microstrip line And lateral ends of the second microstrip line are respectively disposed in parallel with short sides of the rectangular resonance ring.

[0013] Preferably, the length of the vertical end of the first microstrip line is the same as the length of the vertical end of the second microstrip line, and both are smaller than the length of the long side of the rectangular resonant ring.

[0014] Preferably, one end of the lateral end of the first microstrip line is disposed on a left edge of an upper surface of the dielectric plate.

Advantageous effects of the invention

Beneficial effect

[0015] Compared with the prior art, the high-gain filter antenna of the present invention adopts the above technical solution, and achieves the following technical effects: The utility model adds the rectangular resonant ring to the existing antenna, so that the antenna of the present invention It has better filtering characteristics; constituting a reflector through the ground, so that the antenna of the present invention has better radiation characteristics; adding a fifth microstrip line on the other side of the dipole to form a director, further Increase the antenna gain; Improve the matching of the signal by setting a triangular notch at the connection of the third microstrip line.

Brief description of the drawing

DRAWINGS 1 is a schematic diagram showing the upper surface geometry and size of a preferred embodiment of the high gain filter antenna of the present invention. [0017] FIG. 2 is a schematic diagram showing the lower surface geometry and size of a preferred embodiment of the high gain filter antenna of the present invention.

3 is a graph showing reflection coefficient and gain effect of simulation and testing of a preferred embodiment of the high gain filter antenna of the present invention;

4 is a schematic diagram of simulation and testing of a preferred embodiment of the high gain filter antenna of the present invention.

[0020] The objects, features, and advantages of the present invention will be described in conjunction with the embodiments of the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

[0021] In order to further illustrate the technical means and functions of the present invention in order to achieve the above objects, the specific embodiments, structures, features and functions of the present invention will be 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.

1 is a schematic diagram showing the upper surface geometry and size of a preferred embodiment of the high gain filter antenna of the present invention; FIG. 2 is a lower surface of a preferred embodiment of the high gain filter antenna of the present invention; Schematic diagram of geometry and dimensions.

In the embodiment, the high gain filter antenna is printed on the dielectric board 00, and the high gain filter antenna includes an upper surface and a lower surface. The dielectric plate 00 preferably has a dielectric constant of 3.66, a thickness of preferably 0.762 m, and a material of preferably RO4350B.

[0024] In this embodiment, the upper surface of the high gain filter antenna includes a first microstrip line 10, a rectangular resonant ring 11 and a second microstrip line 12, and the rectangular resonant ring 11 is disposed on the first microstrip Between the line 10 and the second microstrip line 12. The first microstrip line 10 and the second microstrip line 12 are both "L-shaped" structures, that is, the first microstrip line 10 and the second microstrip line 12 both include a horizontal end and a vertical end. . The vertical end of the first microstrip line 10 and the vertical end of the second microstrip line 12 are respectively disposed in parallel with the long side of the rectangular resonant ring 11, and the length of the vertical end of the first microstrip line 10 And the length of the vertical end of the second microstrip line 12 is smaller than the length of the long side of the rectangular resonant ring 11, the length of the vertical end of the first microstrip line 10 and the vertical of the second microstrip line 12. End length the same. The lateral ends of the first microstrip line and the lateral ends of the second microstrip line are respectively disposed in parallel with the short sides of the rectangular resonance ring. One end of the lateral end of the first microstrip line is disposed on a left edge of an upper surface of the dielectric plate. The lateral end of the second microstrip line is disposed with an upper surface metal via away from the end of the rectangular resonant ring. The upper surface of the antenna is connected to the lower surface of the antenna through a metal via through the upper surface metal via (see below).

Specifically, the transverse end of the first microstrip line and the transverse end of the second microstrip line are both w _{1 ;} the length of the horizontal end of the first microstrip line is the first microstrip line The length of the vertical end is that the width of the vertical end of the first microstrip line is w _b , and the outer diameter of the rectangular resonant ring is close to the long side of the first microstrip line and the vertical of the first microstrip line The distance between the outer diameters of the ends is w, and the distance between the outer diameter of the rectangular resonant ring near the long side of the second microstrip line and the outer diameter of the vertical end of the second microstrip line is w. The width of the long side of the rectangular resonant ring is w _a , the outer diameter of the long side of the rectangular resonant ring is _a , and the distance between the inner diameters of the two long sides of the rectangular resonant ring is w _d . Referring to the figure, the lower surface of the high gain filter antenna includes a ground, a third microstrip line, a fourth microstrip line, and a fifth microstrip line. The ground is disposed at one end of the left side of the lower surface of the dielectric plate to constitute a reflector. The width of the ground is such that the length of the ground is the same as the width of the dielectric plate. One end of the third microstrip line is arranged in a funnel type, the upper mouth of the funnel type has a width w ₃ , the lower length of the funnel type is a rectangle, and the other end of the third microstrip line is set to be a rectangle Connecting with the lower bottom end of the funnel type forms a connecting portion, and the connecting portion is provided with a triangular notch to facilitate signal matching. The length of the other end of the third microstrip line is such that the other end of the third microstrip line has a width _{W l} . The fourth microstrip line and the other end of the third microstrip line are disposed on the same line. The fourth microstrip line is adjacent to one end of the third microstrip line connecting portion and is provided with a lower surface metal via 4 corresponding to a position of a lateral end port of the second microstrip line. The width of the fourth microstrip line 22 is w .

The upper surface and the lower surface of the antenna are connected through the upper surface metal via and the lower surface metal via through a metal copper pillar, such that the second microstrip line, the third microstrip line, and the fourth microstrip The lines together form a dipole.

The fifth microstrip line is disposed on a right side of the dipole to form a director. The length of the fifth microstrip line is such that the width of the fifth microstrip line 23 is w ₂ . The fifth microstrip line 23 and the fourth micro The distance between the strip lines 22 is w ₄ .

[0029] The embodiment of the present invention provides a good filtering effect by adding a rectangular resonant ring to the existing antenna, and has good filtering characteristics; forming a reflector through the ground, so that the antenna has an directional effect and has good radiation. Characteristics: By adding a fifth microstrip line on the other side of the dipole to form a director, the antenna gain is further improved; by setting a triangular notch at the connection portion of the third microstrip line, the signal matching degree is improved.

[0030] The technical effects of the high gain filter antenna of the present invention will be described below with reference to specific embodiments. Referring to Table 1, Table 1 is a parameter value of a preferred embodiment of the high gain filter antenna of the present invention.

[0031] Table 1 of the present invention high gain filter antenna preferred embodiment parameter values

[]

[] [Table 1]

[0032] 3

[0033]

[0034] As shown in FIG. 3, FIG. 3 is a graph showing reflection coefficient and gain effect of simulation and testing of a preferred embodiment of the high gain filter antenna of the present invention. The preferred embodiment uses the parameter values shown in Table 1. It can be seen from the simulation and actual measurement results of Fig. 3 that the reflection coefficient IS11I of the high gain filter antenna of the present invention has two resonance frequency points, respectively resonating at 2.35 GHz and 2.45 GHz. This is because the utility model integrates a rectangular resonant ring on the basis of the existing antenna, which is equivalent to integrating a dual-mode high-selectivity filter. Due to the different values of the odd-even mode, the antenna can resonate at two frequencies. , reflects the good filtering characteristics. It can also be seen from Fig. 3 that the measured antenna gain is flat in the operating frequency band and rapidly drops outside the operating band, reflecting the high selectivity of the antenna. If the rectangular resonant ring is removed and connected directly with the microstrip line, it can be seen that the antenna is not filterable. Can and out of band suppression performance.

[0035] As shown in FIG. 4, FIG. 4 is a schematic diagram of simulation and testing of a preferred embodiment of the high gain filter antenna of the present invention. The preferred embodiment uses the parameter values shown in Table 1. As can be seen from Fig. 4, the antenna of the present invention has an orientation effect in the y direction, which embodies good radiation characteristics. The simulated gain is 5.87dB and the front-to-back ratio is 1 6.3dB. There are some deviations between the simulation and the measured results, which are caused by the loss of the connector and the machining error.

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

Compared with the prior art, the high-gain filter antenna of the present invention adopts the above technical solution, and achieves the following technical effects: The utility model adds the rectangular resonant ring to the existing antenna, so that the antenna of the present invention It has better filtering characteristics; constituting a reflector through the ground, so that the antenna of the present invention has better radiation characteristics; adding a fifth microstrip line on the other side of the dipole to form a director, further Increase the antenna gain; Improve the matching of the signal by setting a triangular notch at the connection of the third microstrip line.

Claims

Claim

A high gain filter antenna, comprising: an upper surface and a lower surface, wherein the upper surface and the lower surface are both printed on a dielectric plate, wherein: the upper surface comprises a first microstrip line, a rectangular resonant ring and a second microstrip line, the rectangular resonant ring being disposed between the first microstrip line and the second microstrip line; the second microstrip line being provided with an upper surface metal via; The surface includes a ground, a third microstrip line, a fourth microstrip line, and a fifth microstrip line; one end of the third microstrip line is disposed in a funnel type, and the other end of the third microstrip line is disposed in a rectangular shape Connecting with the lower bottom end of the funnel type to form a connecting portion, the connecting portion is provided with a triangular notch; the fourth microstrip line and the other end of the third microstrip line are disposed on the same line; a fourth surface of the microstrip is provided with a lower surface metal via matching the upper surface metal via; the upper surface and the lower surface of the antenna pass through the upper surface metal via and the lower surface through the metal copper pillar Metal vias are connected to make the second Strip line, microstrip line and the third microstrip line together constitute a fourth dipole; microstrip line disposed on the right side of the fifth to the third microstrip line and the fourth microstrip line formed guide.

The high gain filter antenna according to claim 1, wherein said first microstrip line and said second microstrip line are both "L-shaped" structures, each comprising a lateral end and a vertical end.

The high gain filter antenna according to claim 2, wherein said upper surface metal via is disposed at a lateral end of said second microstrip line away from an end of said rectangular resonant ring. The high gain filter antenna according to claim 3, wherein said lower surface metal via is provided at a position close to one end of said third microstrip line connecting portion and corresponding to said upper surface metal via.

The high gain filter antenna according to claim 2, wherein a vertical end of the first microstrip line and a vertical end of the second microstrip line are respectively disposed in parallel with a long side of the rectangular resonance ring, The lateral ends of the first microstrip line and the lateral ends of the second microstrip line are respectively disposed in parallel with the short sides of the rectangular resonance ring.

The high gain filter antenna according to claim 2, wherein a length of the vertical end of the first microstrip line is the same as a length of the vertical end of the second microstrip line, and both are smaller than the rectangular resonant ring The length of the long side. [Claim 7] The high gain filter antenna according to claim 2, wherein one end of the lateral end of the first microstrip line is disposed on a left edge of an upper surface of the dielectric plate.