Ultra-wideband ceramic antenna

Abstract

The present invention is an ultra-wideband ceramic antenna, comprising a circuit board substrate, a solder pad is provided at a corner area of ​​the front side of the circuit board substrate, a ceramic antenna substrate is connected to the solder pad, the side end surface and the upper end surface of the ceramic antenna substrate are covered with an antenna metal plate, and a feed circuit board is provided on the back side of the circuit board substrate relative to the solder pad, and the feed circuit board is connected to the antenna metal plate on the other side through a via hole provided on the circuit board substrate and a conductive column in the via hole. The antenna of the present invention supports WIFI5 / WIFI6 / WIFI6E / UWB frequency bands, can work within an ultra-large bandwidth of 5GHz-8.5GHz, and achieve a return loss of -10dB within this bandwidth.

Description

Technical Field

[0001] The invention relates to the technical field of wireless communications, and in particular to an ultra-wideband ceramic antenna. Background Art

[0002] With the rapid development of wireless communication technology, the size and integration of electronic devices are becoming increasingly demanding, but customers' requirements for performance have not decreased but increased. Antennas are an important part of wireless communication equipment's external communication, and the reliability of its communication with the outside world depends largely on antenna performance. Recently, the wireless communication industry has become increasingly interested in 6GHz-8.5GHz frequency band communications. Some countries will use the WIFI6E frequency band as a supplement to 5G communications. In addition, UWB communications will also be increasingly widely used.

[0003] In view of the above huge technical and market demands, the present invention proposes an ultra-wideband, small-size, easily integrated ceramic antenna for the communication hotspots in this frequency band to meet the wireless communication needs. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems existing in the prior art and provide an ultra-wideband ceramic antenna.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] An ultra-wideband ceramic antenna comprises a circuit board substrate, a soldering pad is provided at a corner area of ​​the front side of the circuit board substrate, the soldering pad is connected to the ceramic antenna substrate, the side end surface and the upper end surface of the ceramic antenna substrate are covered with an antenna metal plate, and a feed circuit board is provided on the back side of the circuit board substrate relative to the soldering pad, and the feed circuit board is connected to the antenna metal plate on the other side through a via hole provided on the circuit board substrate and a conductive column in the via hole.

[0007] Furthermore, the antenna metal plate includes a first antenna metal plate and a second antenna metal plate, the first antenna metal plate and the second antenna metal plate are symmetrically covered on the side end surface and the upper end surface of the ceramic antenna substrate, and an isolation gap is left between the first antenna metal plate and the second antenna metal plate at the upper end surface of the ceramic antenna substrate to optimize the return loss, and the feed circuit board is connected to the first antenna metal plate or the second antenna metal plate through a conductive column.

[0008] Furthermore, a first metal layer is provided on the front side of the circuit board substrate, and a bridging metal layer is provided on the back side of the circuit board substrate and on one side of the feed circuit board. The first metal layer is connected to one end of the bridging metal layer on the other side through a via and a conductive column in the via, and the other end of the bridging metal layer is connected to the second antenna metal plate or the first antenna metal plate through a via and a conductive column in the via.

[0009] Furthermore, a second metal layer is provided on the back side of the circuit board substrate and on the other side of the feed circuit board, and one end of the second metal layer is connected to the first metal layer through a via hole and a conductive column in the via hole.

[0010] Furthermore, a circular hole with a notch is provided on the first metal layer, and the notch ends of the circular hole respectively form a first straight leg edge and a second straight leg edge at a certain angle, the first straight leg edge extends to an outer edge of the first metal layer, and the second straight leg edge extends obliquely to one end of the isolation gap, and the other outer edge of the first metal layer extends obliquely and intersects with the second straight leg edge below one end of the isolation gap to form an intersection tip portion for optimizing the return loss.

[0011] Furthermore, the isolation gap is in the shape of a straight gap, a cross gap, a gradient gap or a gap with a circle in the middle.

[0012] Furthermore, the second metal layer is provided with a circular hole having a notch and a straight leg edge extending outward along the notch.

[0013] The beneficial effects of the present invention are:

[0014] The antenna of the present invention supports WIFI5 / WIFI6 / WIFI6E / UWB frequency bands, can be easily surface-mounted on an integrated circuit, and can operate within an ultra-large bandwidth of 5GHz-8.5GHz at an extremely low height, and achieve a return loss of -10dB and good radiation performance within the bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the back structure of the present invention;

[0017] Figure 3 It is a front oblique perspective stereogram of the present invention;

[0018] Figure 4 It is a three-dimensional image of the present invention from a rear oblique viewing angle;

[0019] Figure 5 For the present invention Figure 1 A view of the circuit board substrate after being made transparent;

[0020] Figure 6 This is a 3D perspective view of the transparent circuit board substrate of the present invention;

[0021] Figure 7 Return loss diagram of the antenna of the present invention;

[0022] Figure 8 It is the gain diagram of the antenna of the present invention.

[0023] Explanation of the numbers in the figure: 1. circuit board substrate, 2. soldering pad, 3. ceramic antenna substrate, 4. first antenna metal plate, 5. second antenna metal plate, 6. isolation gap, 7. feed circuit board, 8. conductive column, 9. first metal layer, 91. circular hole, 92. first straight leg edge, 93. second straight leg edge, 94. intersection tip, 10. bridging metal layer, 11. second metal layer. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] like Figures 3 to 6 As shown, an ultra-wideband ceramic antenna includes a circuit board substrate 1, a soldering pad 2 is provided at a corner area of ​​the front side of the circuit board substrate 1, a ceramic antenna substrate 3 is connected to the soldering pad 2, the side end surface and the upper end surface of the ceramic antenna substrate 3 are covered with an antenna metal plate, and a feed circuit board 7 is provided on the back side of the circuit board substrate 1 relative to the soldering pad 2, and the feed circuit board 7 is connected to the antenna metal plate on the other side through a via hole provided on the circuit board substrate 1 and a conductive column 8 in the via hole.

[0026] The antenna metal plate includes a first antenna metal plate 4 and a second antenna metal plate 5, which are symmetrically covered on the side end surface and the upper end surface of the ceramic antenna substrate 3. In the present embodiment, the length of the first antenna metal plate 4 and the second antenna metal plate 5 is between 0.3-0.5 dielectric wavelengths, the width is between 0.12-0.22 dielectric wavelengths, and the thickness is between 0.1-0.15 dielectric wavelengths. An isolation gap 6 is left between the first antenna metal plate 4 and the second antenna metal plate 5 at the upper end surface of the ceramic antenna substrate 3 to optimize the return loss. In the present embodiment, the width of the isolation gap 6 is 0.012-0.02 dielectric wavelengths. The feed circuit board 7 is connected to the first antenna metal plate 4 or the second antenna metal plate 5 through a conductive column 8.

[0027] A first metal layer 9 is provided on the front side of the circuit board substrate 1, and a bridging metal layer 10 is provided on the back side of the circuit board substrate 1 and on one side of the feed circuit board 7. The first metal layer 9 is connected to one end of the bridging metal layer 10 on the other side through a via and a conductive column 8 in the via, and the other end of the bridging metal layer 10 is connected to the second antenna metal plate 5 or the first antenna metal plate 4 through a via and a conductive column 8 in the via.

[0028] A second metal layer 11 is provided on the back side of the circuit board substrate 1 and on the other side of the feed circuit board 7 , and one end of the second metal layer 11 is connected to the first metal layer 9 through a via hole and a conductive column 8 in the via hole.

[0029] like Figure 1 As shown, a circular hole 91 with a notch is provided on the first metal layer 9, and the notch ends of the circular hole 91 respectively form a first straight leg side 92 and a second straight leg side 93 with a certain angle, the first straight leg side 92 extends to an outer edge of the first metal layer 9, and the second straight leg side 93 extends obliquely to one end of the isolation gap 6, and the other outer edge of the first metal layer 9 extends obliquely and intersects with the second straight leg side 93 below one end of the isolation gap 6, forming an intersection tip 94 for optimizing the return loss.

[0030] The isolation gap 6 is in the shape of a straight gap, a cross gap, a gradient gap or a gap with a circle in the middle.

[0031] like Figure 2 As shown, the second metal layer 11 is provided with a circular hole with a notch and a straight leg edge extending outward along the notch.

[0032] In this embodiment, only one of the first metal layer 9 and the second metal layer 11 can be retained as needed without affecting the performance. The length is between 0.19-0.31 wavelengths of the center frequency of the frequency band used, and the width is between 0.08-0.10 wavelengths of the center frequency of the frequency band used. Electronic components can be arranged in the first metal layer 9 or the second metal layer 11 without affecting the antenna performance.

[0033] like Figure 7 As shown, this is the antenna return loss diagram of the present invention. The ultra-wideband ceramic antenna of the present invention is used. It can be clearly seen from the figure that two resonances can be achieved, and the operating frequency band can reach an ultra-large bandwidth of 5GHz-8.5GHz, supporting WIFI5 / WIFI6 / WIFI6E / UWB frequency bands, and achieving a return loss of -10dB within this bandwidth.

[0034] like Figure 8 As shown, it is the antenna gain diagram of the present invention, which can achieve a gain of 2.1dBi-3.3dBi and has good omnidirectional radiation performance.

[0035] In addition, it should be noted that, unless otherwise specified or indicated, the terms "first", "second", etc. in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-wideband ceramic antenna, characterized in that: It comprises a circuit board substrate (1), a solder pad (2) is provided at a corner area of ​​the front side of the circuit board substrate (1), a ceramic antenna substrate (3) is connected to the solder pad (2), the side end surface and the upper end surface of the ceramic antenna substrate (3) are covered with an antenna metal plate, and a feeder circuit board (7) is provided on the back side of the circuit board substrate (1) relative to the solder pad (2), and the feeder circuit board (7) is connected to the antenna metal plate on the other side via a via hole provided on the circuit board substrate (1) and a conductive column (8) in the via hole; The antenna metal plate comprises a first antenna metal plate (4) and a second antenna metal plate (5), wherein the first antenna metal plate (4) and the second antenna metal plate (5) symmetrically cover the side end surface and the upper end surface of the ceramic antenna substrate (3), and an isolation gap (6) is left between the first antenna metal plate (4) and the second antenna metal plate (5) at the upper end surface of the ceramic antenna substrate (3) to optimize return loss, and the feed circuit board (7) is connected to the first antenna metal plate (4) or the second antenna metal plate (5) via a conductive column (8); A first metal layer (9) is provided on the front side of the circuit board substrate (1), and a bridging metal layer (10) is provided on the back side of the circuit board substrate (1) and on one side of the feed circuit board (7); the first metal layer (9) is connected to one end of the bridging metal layer (10) on the other side through a via hole and a conductive column (8) in the via hole, and the other end of the bridging metal layer (10) is connected to the second antenna metal plate (5) or the first antenna metal plate (4) through the via hole and the conductive column (8) in the via hole; The first metal layer (9) is provided with a circular hole (91) with a notch, and the notch ends of the circular hole (91) respectively form a first straight leg edge (92) and a second straight leg edge (93) with a certain angle, the first straight leg edge (92) extends to an outer edge of the first metal layer (9), the second straight leg edge (93) extends obliquely to one end of the isolation gap (6), and the other outer edge of the first metal layer (9) extends obliquely and intersects with the second straight leg edge (93) below one end of the isolation gap (6), forming an intersection tip portion (94) for optimizing return loss.

2. The ultra-wideband ceramic antenna according to claim 1, characterized in that: A second metal layer (11) is provided on the back side of the circuit board substrate (1) and on the other side of the feeder circuit board (7), and one end of the second metal layer (11) is connected to the first metal layer (9) through a via hole and a conductive column (8) in the via hole.

3. The ultra-wideband ceramic antenna according to claim 1 or 2, characterized in that: The isolation gap (6) is in the shape of a straight gap, a cross gap, a gradient gap, or a gap with a circle in the middle.

4. The ultra-wideband ceramic antenna according to claim 2, characterized in that: The second metal layer (11) is provided with a circular hole having a notch and a straight leg edge extending outward along the notch.

Images