CN221861946U - Low-profile probe feed microstrip antenna - Google Patents

Abstract

The utility model discloses a low-profile probe feed microstrip antenna, comprising: the PCB medium plate is embedded on a radiation sheet on the surface of the top surface of the PCB medium plate, a receiving and transmitting feed point embedded on the radiation sheet, a first broadside coupling branch, a first long side coupling branch, a second broadside coupling branch and a second long side coupling branch; the radiation piece is rectangular, a groove is formed in the upper radiation edge, a group of diagonal angles of the radiation piece are oblique cutting angles, and the broadside coupling branch joint I, the long side coupling branch joint I, the broadside coupling branch joint II and the long side coupling branch joint II correspondingly surround the four sides of the radiation piece; an oscillating plate is arranged on the bottom surface of the PCB dielectric plate; and a through hole at one end of the receiving and transmitting feed point penetrates through the PCB dielectric plate and is connected with the oscillating plate main board. The utility model adopts the probe feed point antenna, and the grooves are additionally arranged in the rectangular radiating sheet, thereby influencing the parameter performance of the antenna, improving the one-to-one problem, improving the stability and resisting 2.4GWIFI interference signals.

Description

A low profile probe-fed microstrip antenna

Technical Field

The utility model relates to the technical field of antennas, in particular to a low-profile probe-fed microstrip antenna.

Background Art

Microstrip antennas have a narrow frequency band and large losses, so they are less efficient, which is similar to microstrip circuits. In particular, traveling wave microstrip antennas have large losses in matching loads. The power capacity of a single microstrip antenna is small. The dielectric substrate has a great impact on performance. Due to the limitations of process conditions, the uniformity and consistency of mass-produced dielectric substrates are still lacking.

The patent document with application number 202223285322.4 discloses a high-order mode-removing dielectric microstrip antenna, characterized in that it includes a dielectric plate, a radiation patch assembly is provided on the surface of the dielectric plate, and an oscillation plate is installed on the bottom surface of the dielectric plate; it also includes a short-circuit column that sequentially passes through the radiation patch assembly and the dielectric plate and is connected to the bottom surface of the dielectric plate, and a transceiver feed point that sequentially passes through the radiation patch assembly and the dielectric plate and is connected to the oscillation plate; the radiation patch assembly includes a radiation metal patch, the radiation metal patch is arranged in a square structure, and one set of diagonals is respectively provided with a bevel angle, and it also includes parallel arranged on the radiation metal patch. The coupling metal patches on each side are arranged in a parallelogram structure, and a coupling gap is provided between the coupling metal patch and the radiating metal patch; the short-circuit post and the transceiver feed point are both located on the radiating metal patch, the short-circuit post is located at the center of the radiating metal patch, and the transceiver feed point is located in the direction in which the short-circuit post is perpendicular to one of the coupling metal patches. This patent has the following defects: 1. It is mainly used for low-impedance antennas and cannot resist 2.4G WIFI interference signals. The peak value of the antenna module after production is not very good and is unstable. Therefore, the applicant has made further improvements on this basis.

Utility Model Content

In view of the problems existing in the prior art, the utility model provides a low-profile probe-fed microstrip antenna.

In order to achieve the above purpose, the technical solution of the utility model is as follows:

The utility model provides a low-profile probe-fed microstrip antenna, comprising: a PCB dielectric board (010), a radiation sheet (011) embedded on the top surface of the PCB dielectric board (010), a transceiver feed point (012) embedded on the radiation sheet (011), a first broadside coupling branch node (013), a first longside coupling branch node (014), a second broadside coupling branch node (015), and a second longside coupling branch node (016);

The radiation sheet (011) is rectangular, and a groove is provided on the upper radiation side. A set of diagonal angles of the radiation sheet are set as bevel angles. The wide side coupling branch node 1 (013), the long side coupling branch node 1 (014), the wide side coupling branch node 2 (015), and the long side coupling branch node 2 (016) are correspondingly arranged around the four sides of the radiation sheet (011);

An oscillating plate is installed on the bottom surface of the PCB dielectric board; a via hole at one end of the transceiver feed point penetrates through the PCB dielectric board and is connected to the oscillating plate main board.

Preferably, the PCB dielectric board is made of FR4 or Rogers 4350 double-sided board material, and the dielectric constant of the PCB dielectric board is 2-4.6 and the thickness is 0.6-1.2 mm.

Preferably, the wide side coupling branch node 1 (013), the long side coupling branch node 1 (014), the wide side coupling branch node 2 (015), and the long side coupling branch node 2 (016) are all embedded in the top surface of the PCB dielectric board and are in the shape of a parallelogram.

Preferably, the lower radiating edge and the right radiating edge of the radiating sheet (011) intersect vertically at 90°, and the length of the lower radiating edge and the right radiating edge is 11-13 mm.

The left radiating edge and the upper radiating edge of the radiating sheet (011) intersect vertically at an angle of 90°, and the length of the left radiating edge and the upper radiating edge is 11-13 mm.

Preferably, the two bevel angles of the radiation sheet (011) are respectively set to a 45° bevel angle structure, and the lengths of the two bevel angles are respectively set to 0.6-2 mm.

Preferably, the transceiver feed point (012) is 6-9 m away from the right radiating edge of the radiation sheet (011), and is 8-10 m away from the lower radiating edge.

Preferably, the hypotenuse 1 of the long side coupling branch 1 (014) and the long side coupling branch 2 (016) are both set at 45° to the corresponding upper horizontal side and 135° to the lower horizontal side, and the length of the hypotenuse 1 is 0.5-1.2mm, and the lengths of the upper horizontal side 1 and the lower horizontal side 1 are 16-20mm.

Preferably, the hypotenuse 2 of the wide-side coupling branch node 1 (013) and the wide-side coupling branch node 2 (015) are both set at 45° to the corresponding right horizontal edge and 135° to the left horizontal edge, and the length of the hypotenuse 2 is 0.5-1.2mm, and the length of the right horizontal edge and the left horizontal edge is 11-13mm.

Preferably, coupling gaps are provided between the long-side coupling branch 1, the long-side coupling branch 2, the wide-side coupling branch 1, and the wide-side coupling branch 2 and the radiation sheet, and the distance of the coupling gaps is 0.3-1.2 mm.

Preferably, the groove is inclined at both sides and is set at 135° to the bottom surface and 45° to the top notch. The length of the bottom surface is 6-8 mm, and the length of the top notch is 7-9 mm.

The technical solution of the utility model has the following beneficial effects:

The utility model adopts a probe feed point antenna, and a groove is added in the rectangular radiation piece, which affects the parameter performance of the antenna, improves the consistency problem, improves the stability, can resist 2.4GWIFI interference signals, and can be applied to human motion sensing products in the 5.725G-5.875G frequency band.

The utility model low-profile probe-fed microstrip antenna changes the radiation structure on the basis of the traditional microstrip antenna to widen the antenna bandwidth, and adds four coupling nodes around the antenna to further widen the antenna bandwidth, thus achieving a new type of antenna with good directivity and easy mass production.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a low-profile probe-fed microstrip antenna according to the present invention;

FIG2 is a second structural schematic diagram of a low-profile probe-fed microstrip antenna according to the present invention;

FIG3 is a graph of antenna return loss of the low-profile probe-fed microstrip antenna of the utility model;

FIG. 4 is a three-dimensional gain pattern of the low-profile probe-fed microstrip antenna of the utility model.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

1 to 2, the utility model provides a low-profile probe-fed microstrip antenna, including: a PCB dielectric board 010, a radiation sheet 011 embedded on the top surface of the PCB dielectric board 010, a transceiver feed point 012 embedded on the radiation sheet 011, a broadside coupling branch node 1 013, a longside coupling branch node 1 014, a broadside coupling branch node 2 015, and a longside coupling branch node 2 016;

The radiation sheet 011 is rectangular, and a groove S3 is provided on the upper radiation edge L4. The groove S3 is inclined at both sides and is set at 135° with the bottom surface, and the top notch is set at 45°. The length of the bottom surface is L9, and L9 is 6-8 mm. The length of the top notch is L10, and L10 is 7-9 mm. A set of diagonal angles of the radiation sheet 011 is set as bevel angles (S1, S2), and the wide side coupling branch node 1 013, the long side coupling branch node 1 014, the wide side coupling branch node 2 015, and the long side coupling branch node 2 016 are correspondingly surrounded by four sides of the radiation sheet 011.

An oscillating plate is installed on the bottom surface of the PCB dielectric plate 010; one end of the transceiver feed point 012 passes through the PCB dielectric plate 010 through a via hole and is connected to the oscillating plate main board.

Furthermore, the PCB dielectric board 010 is made of FR4 or Rogers 4350 double-sided board material, and the dielectric constant of the PCB dielectric board 011 is 2-4.6 and the thickness is 0.6-1.2 mm.

Furthermore, the wide-side coupling branch node 1 013, the long-side coupling branch node 1 014, the wide-side coupling branch node 2 015, and the long-side coupling branch node 2 016 are all embedded in the top surface of the PCB dielectric plate 010 and are in the shape of a parallelogram, and the radiation plate 011 is set as a radiation metal plate; wherein the wide-side coupling branch node 1 013 is close to the radiation plate 011 in the X2-axis direction, the long-side coupling branch node 1 014 is close to the radiation plate 011 in the Y2-axis direction, the wide-side coupling branch node 2 015 is close to the radiation plate 011 in the X1-axis direction, and the long-side coupling branch node 2 016 is close to the radiation plate 011 in the Y1-axis direction.

Furthermore, the lower radiating edge L1 of the radiating plate 011 intersects the right radiating edge at a vertical angle of 90 degrees, and the length of the lower radiating edge L1 and the right radiating edge L2 is 11-13mm; the left radiating edge L3 of the radiating plate 011 intersects the upper radiating edge L4 at a vertical angle of 90 degrees, and the length of the left radiating edge L3 and the upper radiating edge L4 is 11-13mm. The two bevel angles (S1, S2) of the radiating plate 011 are respectively set to a 45° bevel angle structure, and the lengths of the two bevel angles are respectively set to 0.6 to 2mm. The length of the transceiver feed point 012 from the right radiating edge of the radiating plate 011 is L5 and is 6-9m, and the length of the transceiver feed point 012 from the lower radiating edge is L6, and L6 is 8-10m.

Furthermore, the hypotenuse L12 of the long side coupling branch 014 and the long side coupling branch 016 are both set at 45° to the corresponding upper horizontal side L11 and 135° to the lower horizontal side, and the length of the hypotenuse L12 is 0.5-1.2mm, and the length of the upper horizontal side L11 and the lower horizontal side is 16-20mm. The hypotenuse L14 of the wide-side coupling branch 013 and the wide-side coupling branch 015 are both set at 45° to the corresponding right horizontal edge L13 and 135° to the left horizontal edge, and the length of the hypotenuse L13 is 0.5-1.2mm, and the lengths of the right horizontal edge and the left horizontal edge are 11-13mm; the long-side coupling branch 014, the long-side coupling branch 016, the wide-side coupling branch 013, and the wide-side coupling branch 015 are all provided with coupling gaps with the radiation plate 011, and the distance of the coupling gaps is 0.3-1.2mm.

In this embodiment, the local oscillator circuit on the oscillation board mainboard outputs a 5.8G high-frequency signal, which is transmitted to the radiation plate 011 through the transceiver feed point 012 of the mixer to radiate the electromagnetic wave electric field. Since the electromagnetic wave satisfies the reciprocity theorem, the transmitted and received electromagnetic waves can be exchanged, and the electromagnetic waves can be transmitted and received at one feeding port. The wide-side coupling branch 1 013, the long-side coupling branch 1 014, the wide-side coupling branch 2 015, and the wide-side coupling branch 2 016 surround the radiation plate 011 on all four sides, receive and radiate energy, and achieve the effect of widening the bandwidth.

The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly/indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims (10)

1. A low-profile probe-fed microstrip antenna, characterized in that it comprises: a PCB dielectric board, a radiation sheet embedded on the top surface of the PCB dielectric board, a transceiver feed point embedded on the radiation sheet, a first broadside coupling branch, a first longside coupling branch, a second broadside coupling branch, and a second longside coupling branch; The radiation sheet is rectangular, and a groove is provided on the upper radiation side. A set of diagonal angles of the radiation sheet are set as bevel angles. The wide side coupling branch node 1, the long side coupling branch node 1, the wide side coupling branch node 2, and the long side coupling branch node 2 are correspondingly surrounded on four sides of the radiation sheet. An oscillating plate is installed on the bottom surface of the PCB dielectric board; a via hole at one end of the transceiver feed point penetrates through the PCB dielectric board and is connected to the oscillating plate main board. 2. The low-profile probe-fed microstrip antenna according to claim 1 is characterized in that the PCB dielectric board is made of FR4 or Rogers 4350 double-sided board material, the dielectric constant of the PCB dielectric board is 2-4.6, and the thickness is 0.6-1.2 mm. 3. The low-profile probe-fed microstrip antenna according to claim 2 is characterized in that the broadside coupling branch node 1 (013), the long side coupling branch node 1 (014), the broadside coupling branch node 2 (015), and the long side coupling branch node 2 (016) are all embedded in the top surface of the PCB dielectric board and are in the shape of a parallelogram. 4. The low-profile probe-fed microstrip antenna according to claim 1, characterized in that the lower radiating edge and the right radiating edge of the radiating plate (011) intersect vertically at 90°, and the length of the lower radiating edge and the right radiating edge is 11-13 mm; The left radiating edge and the upper radiating edge of the radiating sheet (011) intersect vertically at an angle of 90°, and the length of the left radiating edge and the upper radiating edge is 11-13 mm. 5. The low-profile probe-fed microstrip antenna according to claim 4, characterized in that the two bevel angles of the radiation plate (011) are respectively set to a 45° bevel angle structure, and the lengths of the two bevel angles are respectively set to 0.6 to 2 mm. 6. The low-profile probe-fed microstrip antenna according to claim 5 is characterized in that the length of the transceiver feed point (012) from the right radiating edge of the radiation plate (011) is 6-9m, and the length of the transceiver feed point (012) from the lower radiating edge is 8-10m. 7. The low-profile probe-fed microstrip antenna according to claim 3 is characterized in that the hypotenuse 1 of the long-side coupling branch 1 (014) and the long-side coupling branch 2 (016) are both arranged at 45° to the corresponding upper horizontal side and 135° to the lower horizontal side 1, and the length of the hypotenuse 1 is 0.5-1.2 mm, and the lengths of the upper horizontal side 1 and the lower horizontal side 1 are 16-20 mm. 8. The low-profile probe-fed microstrip antenna according to claim 3 is characterized in that the hypotenuse 2 of the broadside coupling branch node 1 (013) and the broadside coupling branch node 2 (015) are both set at 45° to the corresponding right horizontal edge and 135° to the left horizontal edge, and the length of the hypotenuse 2 is 0.5-1.2 mm, and the lengths of the right horizontal edge and the left horizontal edge are 11-13 mm. 9. The low-profile probe-fed microstrip antenna according to claim 8 is characterized in that coupling gaps are provided between the long-side coupling branch 1, the long-side coupling branch 2, the wide-side coupling branch 1, and the wide-side coupling branch 2 and the radiation plate, and the distance of the coupling gaps is 0.3-1.2 mm. 10. The low-profile probe-fed microstrip antenna according to claim 1 is characterized in that the groove is inclined at both sides and is set at 135° to the bottom surface and 45° to the top notch, the length of the bottom surface is 6-8mm, and the length of the top notch is 7-9mm.