A bidirectional radiating antenna based on folded SIW feed
Patent Information
- Application Number
- CN202522114988.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0006]本实用新型所要解决的技术问题是传统贴片天线带宽窄、馈电网络损耗大，目的在于提供一种基于折叠SIW馈电的双向辐射天线，解决了传统贴片天线带宽窄、馈电网络损耗大的问题
[0019]本实用新型提供的基于折叠SIW馈电的双向辐射天线，根据折叠SIW的电磁传输特性，将第一金属层、第一介质层、第二金属层、第一介质粘接层、第三金属层、第二介质层与背面辐射层、第四介质层、第六金属层、第二介质粘接层、第五金属层、第三介质层设计成分别关于第四金属层在垂直方向镜像对称，实现了电磁场的双向定向辐射，从而有效简化了馈电网络。该天线的辐射贴片均开设缝隙，展宽了天线的带宽，并且辐射贴片通过金属化过孔与下层金属片连接，实现辐射贴片的折叠，引入谐振点，进一步拓展了带宽。本实用新型通过缝隙结构能够实现电磁波从SIW馈电网络耦合到上层辐射结构，设计成折叠SIW结构，实现了馈电网络的小型化。综上，本实用新型的基于折叠SIW馈电的双向辐射天线不仅能够降低天线损耗，同时展宽天线的带宽，而且兼顾了传统贴片天线的优点。
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Figure CN224789928U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of patch antenna technology, specifically to a bidirectional radiating antenna based on folded SIW feeding. Background Technology
[0002] Patch antennas have been widely used in millimeter-wave communication and other fields due to their low profile, ease of integration, small size, and light weight. Traditional patch antennas often use microstrip lines or striplines as the feed network, which suffers from high losses and is limited by the operating bandwidth, making it difficult to meet the needs of broadband communication. Bidirectional radiating antennas have a figure-eight pattern, capable of covering two opposite directions for electromagnetic transmission. To achieve bidirectional radiation, two feeds or a single feed are often required, and electromagnetic excitation is achieved through the design of the feed network.
[0003] Folded SIW structures possess the transmission characteristics of SIW structure metallic waveguides, featuring low loss and high quality factor, while also significantly reducing size, making them suitable for miniaturized applications.
[0004] Therefore, how to reduce antenna loss while widening the antenna bandwidth, and take into account the advantages of traditional patch antennas, so as to overcome the shortcomings of traditional patch antennas such as narrow bandwidth and large power supply network loss, is an urgent problem to be solved in this field.
[0005] In summary, in view of the problems existing in the prior art, there is an urgent need in the art for a bidirectional radiating antenna based on folded SIW feeding that can reduce antenna loss and broaden antenna bandwidth. Utility Model Content
[0006] The technical problem to be solved by this utility model is that traditional patch antennas have narrow bandwidth and high power supply network loss. The purpose is to provide a bidirectional radiating antenna based on folded SIW feeding, which solves the problems of narrow bandwidth and high power supply network loss of traditional patch antennas.
[0007] This utility model is achieved through the following technical solution:
[0008] One aspect of this utility model provides a bidirectional radiating antenna based on folded SIW feeding. The antenna includes, from top to bottom, a first metal layer, a first dielectric layer, a second metal layer, a first dielectric bonding layer, a third metal layer, a second dielectric layer, a fourth metal layer, a third dielectric layer, a fifth metal layer, a second dielectric bonding layer, a sixth metal layer, a fourth dielectric layer, and a back radiating layer. The first metal layer, the first dielectric layer, the second metal layer, the first dielectric bonding layer, the third metal layer, and the second dielectric layer are respectively mirror-symmetrical with respect to the back radiating layer, the fourth dielectric layer, the sixth metal layer, the second dielectric bonding layer, the fifth metal layer, and the third dielectric layer in the vertical direction about the fourth metal layer.
[0009] The bidirectional radiating antenna based on folded SIW feeding described above is preferably provided in which both the first metal layer and the back radiating layer include a radiating patch and a metal ground, and the radiating patch is composed of two symmetrically distributed metal structures.
[0010] Preferably, in the bidirectional radiating antenna based on folded SIW feeding described above, both the first dielectric layer and the fourth dielectric layer are provided with a first metallized via and a second metallized via.
[0011] The bidirectional radiating antenna based on folded SIW feeding described above is preferably characterized in that the first metallized via of the first dielectric layer connects the ground of the first metal layer and the second metal layer, and the second metallized via connects upward to the radiating patch of the first metal layer and downward to the metal sheet of the second metal layer; the first metallized via of the fourth dielectric layer connects the ground of the sixth metal layer and the back radiating layer, and the second metallized via connects downward to the radiating patch of the back radiating layer and upward to the metal sheet of the sixth metal layer.
[0012] Preferably, in the bidirectional radiating antenna based on folded SIW feeding described above, both the second metal layer and the sixth metal layer are composed of metal sheets and metal ground.
[0013] Preferably, in the bidirectional radiating antenna based on folded SIW feeding described above, a third metallized via is provided in both the first dielectric bonding layer and the second dielectric bonding layer.
[0014] Preferably, in the bidirectional radiating antenna based on folded SIW feeding described above, gaps are formed on both the third metal layer and the fifth metal layer.
[0015] Preferably, in the bidirectional radiating antenna based on folded SIW feeding described above, a fourth metallized via is provided in both the second dielectric layer and the third dielectric layer.
[0016] In the bidirectional radiating antenna based on folded SIW feeding described above, preferably, the fourth metallized via of the second dielectric layer connects the third metal layer and the fourth metal layer; the fourth metallized via of the third dielectric layer connects the fourth metal layer and the fifth metal layer.
[0017] Preferably, in the bidirectional radiating antenna based on folded SIW feeding described above, a gap is formed on the fourth metal layer.
[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0019] This invention provides a bidirectional radiating antenna based on folded SIW feeding. Based on the electromagnetic transmission characteristics of folded SIW, the first metal layer, first dielectric layer, second metal layer, first dielectric bonding layer, third metal layer, second dielectric layer, and the back radiating layer, fourth dielectric layer, sixth metal layer, second dielectric bonding layer, fifth metal layer, and third dielectric layer are designed to be mirror-symmetrical about the fourth metal layer in the vertical direction, achieving bidirectional directional radiation of the electromagnetic field and effectively simplifying the feeding network. The radiating patches of this antenna all have slots, widening the antenna bandwidth. Furthermore, the radiating patches are connected to the lower metal sheet through metallized vias, achieving folding of the radiating patches, introducing resonant points, and further expanding the bandwidth. This invention, through its slot structure, enables electromagnetic waves to couple from the SIW feeding network to the upper radiating structure. The folded SIW structure design achieves miniaturization of the feeding network. In summary, this invention's bidirectional radiating antenna based on folded SIW feeding not only reduces antenna loss and widens the antenna bandwidth but also retains the advantages of traditional patch antennas. Attached Figure Description
[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:
[0021] Figure 1 This is a schematic top view of a bidirectional radiating antenna based on folded SIW feed according to an embodiment of the present invention;
[0022] Figure 2 for Figure 1 A schematic top view of the first metal layer of a bidirectional radiating antenna;
[0023] Figure 3 for Figure 1 A schematic top view of the first dielectric layer of a bidirectional radiating antenna;
[0024] Figure 4 for Figure 1 A schematic top view of the second metal layer of a bidirectional radiating antenna;
[0025] Figure 5 for Figure 1 A schematic top view of the first dielectric bonding layer of a bidirectional radiating antenna;
[0026] Figure 6 for Figure 1 A schematic top view of the third metal layer of a bidirectional radiating antenna;
[0027] Figure 7 for Figure 1 A schematic top view of the second dielectric layer of a bidirectional radiating antenna;
[0028] Figure 8 for Figure 1 A schematic top view of the fourth metal layer of a bidirectional radiating antenna;
[0029] Figure 9 The simulation results of S11 for the Port port of the bidirectional radiating antenna based on folded SIW feeding according to this invention; and
[0030] Figure 10 The simulated radiation pattern of the bidirectional radiating antenna based on folded SIW feeding according to this invention is shown at 80 GHz.
[0031] The attached diagram shows the markings and corresponding component names:
[0032] 1-Radiating patch, 2-Metallic coverage area, 3-First metallized via, 4-Second metallized via, 5-Metallic sheet, 6-Metallic ground, 7-Third metallized via, 8-Gap, 9-Fourth metallized via, 10-Gap. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0034] It should be noted that all expressions such as "first" and "second" used in the embodiments of this utility model are for the purpose of distinguishing multiple entities or parameters with the same name but different names. It can be seen that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.
[0035] Example
[0036] Based on the above objectives, this utility model provides an embodiment of a bidirectional radiating antenna based on folded SIW feeding. Figure 1This is a schematic top view of the bidirectional radiating antenna based on folded SIW feeding according to this embodiment. Figure 1 As shown, the bidirectional radiating antenna based on folded SIW feeding includes, from top to bottom, a first metal layer, a first dielectric layer, a second metal layer, a first dielectric bonding layer, a third metal layer, a second dielectric layer, a fourth metal layer, a third dielectric layer, a fifth metal layer, a second dielectric bonding layer, a sixth metal layer, a fourth dielectric layer, and a back radiating layer. The first metal layer, the first dielectric layer, the second metal layer, the first dielectric bonding layer, the third metal layer, and the second dielectric layer are respectively mirror-symmetrical about the back radiating layer, the fourth dielectric layer, the sixth metal layer, the second dielectric bonding layer, the fifth metal layer, and the third dielectric layer in the vertical direction about the fourth metal layer.
[0037] The ultra-wideband bidirectional radiating patch antenna based on folded SIW feeding provided in this embodiment has a mirror-symmetric structure in the vertical direction with the folded SIW structure as the center. Electromagnetic waves are fed in through the port, pass through the folded SIW structure, and couple with the radiating structure through the slot, realizing the radiation of electromagnetic waves from the medium into space. This structure can combine the advantages of traditional patch antennas while reducing antenna loss and widening the antenna bandwidth. Furthermore, the antenna in this embodiment can radiate simultaneously on both sides of the antenna plate, making it a single-fed, bidirectional radiating patch antenna.
[0038] It should be noted that, since the first metal layer, first dielectric layer, second metal layer, first dielectric adhesive layer, third metal layer, and second dielectric layer are mirror images of the back radiating layer, fourth dielectric layer, sixth metal layer, second dielectric adhesive layer, fifth metal layer, and third dielectric layer in the vertical direction with respect to the fourth metal layer, for the sake of brevity and ease of understanding, the following text and accompanying figures only illustrate the structure of the first metal layer, first dielectric layer, second metal layer, first dielectric adhesive layer, third metal layer, and second dielectric layer, while omitting the description of the back radiating layer, fourth dielectric layer, sixth metal layer, second dielectric adhesive layer, fifth metal layer, and third dielectric layer (see the corresponding content and accompanying figures below).
[0039] Based on the above embodiments, both the first metal layer and the back radiation layer include a radiation patch 1 and a metal ground, wherein the radiation patch 1 is composed of two symmetrically distributed metal structures.
[0040] Figure 2 The diagram shows a schematic top view of the first metal layer, which includes a radiating patch 1 and a metal ground. The radiating patch 1 consists of two symmetrically distributed metal structures, left and right. Figure 2 Region 2 is a metal-covered area, while the remaining areas are exposed media.
[0041] Based on the above embodiments, both the first dielectric layer and the fourth dielectric layer are provided with a first metallized via 3 and a second metallized via 4. The first metallized via 3 of the first dielectric layer connects the ground plane of the first metal layer and the second metal layer, and the second metallized via 4 connects upward to the radiating patch 1 of the first metal layer and downward to the metal sheet of the second metal layer; the first metallized via 3 of the fourth dielectric layer connects the ground plane of the sixth metal layer and the back radiating layer, and the second metallized via 4 connects downward to the radiating patch of the back radiating layer and upward to the metal sheet of the sixth metal layer.
[0042] Figure 3 The diagram shows a schematic top view of the first dielectric layer, which includes metallized vias connecting the first and second metal layers. These metallized vias consist of two types: first metallized vias 3 and second metallized vias 4. The first metallized vias 3 connect the ground planes of the first and second metal layers, primarily serving an electromagnetic shielding function. The two second metallized vias 4 connect upwards to two radiating patches 1 of the first metal layer and downwards to the metal plates of the second metal layer, primarily serving to broaden the bandwidth.
[0043] Based on the above embodiments, both the second metal layer and the sixth metal layer are composed of a metal sheet 5 and a metal ground 6.
[0044] Figure 4 The diagram shows a schematic top view of the second metal layer, which includes a metal sheet 5 and a metal ground plane 6. The metal sheet 5 is connected to the radial patch 1 of the first metal layer via a second metallized via 4. The remaining portion of the second metal layer is filled with a dielectric adhesive layer.
[0045] Based on the above embodiments, a third metallized via 7 is provided in both the first and second dielectric adhesive layers.
[0046] Figure 5 The diagram shows a schematic top view of the first dielectric adhesive layer, which serves to connect the upper and lower dielectric plates. The first dielectric adhesive layer contains a third metallized via 7 that serves to connect to the metal ground.
[0047] Based on the above embodiments, gaps 8 are provided on both the third metal layer and the fifth metal layer.
[0048] Figure 6 The diagram shows a schematic top view of the third metal layer, which is a metal slot layer. Slots 8 are provided on this complete third metal layer to enable electromagnetic waves to couple from the SIW structure to the radiation layer, thereby enabling electromagnetic fields to radiate in space.
[0049] Based on the above embodiments, a fourth metallized via 9 is provided in both the second dielectric layer and the third dielectric layer. The fourth metallized via 9 in the second dielectric layer connects the third metal layer and the fourth metal layer; the fourth metallized via 9 in the third dielectric layer connects the fourth metal layer and the fifth metal layer.
[0050] Figure 7 The diagram shows a schematic top view of the second dielectric layer, which has a fourth metallized via 9. The fourth metallized via 9 connects the third metal layer and the fourth metal layer, and together with the fifth metal layer and the third dielectric layer, forms a folded SIW structure, which serves as the feed structure for the patch antenna in this embodiment.
[0051] Based on the above embodiment, a gap 10 is formed on the fourth metal layer.
[0052] Figure 8 The diagram shows a schematic top view of the fourth metal layer, which is the ground of the folded SIW structure. A gap 10 is opened on the fourth metal layer, which halves the size of the SIW structure and realizes SIW folding.
[0053] Figure 9 and Figure 10 The simulation results are for the bidirectional radiating antenna based on folded SIW feeding according to this invention. Figure 9 The simulation results for the S11 of the Port port of the bidirectional radiating antenna based on folded SIW feed show that the patch antenna satisfies S11≤-10dB and has an operating bandwidth≥20% in the frequency range of 67.3~83GHz. Figure 10 The simulation pattern of the bidirectional radiating antenna based on folded SIW feed at 80GHz shows that the radiation pattern of the patch antenna is "figure-eight shaped". The patch antenna can simultaneously radiate electromagnetic fields in the forward and backward directions on the PCB board.
[0054] In summary, the bidirectional radiating antenna based on folded SIW feeding provided by this invention, based on the electromagnetic transmission characteristics of folded SIW, designs the first metal layer, first dielectric layer, second metal layer, first dielectric bonding layer, third metal layer, second dielectric layer, and the back radiating layer, fourth dielectric layer, sixth metal layer, second dielectric bonding layer, fifth metal layer, and third dielectric layer to be mirror-symmetrical about the fourth metal layer in the vertical direction, achieving bidirectional directional radiation of the electromagnetic field, thereby effectively simplifying the feeding network. The radiating patches of this antenna all have slots, widening the antenna bandwidth, and the radiating patches are connected to the lower metal sheet through metallized vias, realizing the folding of the radiating patches, introducing resonant points, and further expanding the bandwidth. This invention, through the slot structure, enables electromagnetic waves to couple from the SIW feeding network to the upper radiating structure, and the folded SIW structure design achieves miniaturization of the feeding network. In conclusion, the bidirectional radiating antenna based on folded SIW feeding of this invention not only reduces antenna loss and widens the antenna bandwidth, but also takes into account the advantages of traditional patch antennas.
[0055] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A bidirectional radiating antenna based on folded SIW feeding, characterized in that, The antenna comprises, from top to bottom, a first metal layer, a first dielectric layer, a second metal layer, a first dielectric bonding layer, a third metal layer, a second dielectric layer, a fourth metal layer, a third dielectric layer, a fifth metal layer, a second dielectric bonding layer, a sixth metal layer, a fourth dielectric layer, and a back radiating layer. The first metal layer, the first dielectric layer, the second metal layer, the first dielectric adhesive layer, the third metal layer, and the second dielectric layer are respectively mirror-symmetrical about the back radiation layer, the fourth dielectric layer, the sixth metal layer, the second dielectric adhesive layer, the fifth metal layer, and the third dielectric layer in the vertical direction with respect to the fourth metal layer.
2. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, Both the first metal layer and the back radiation layer include a radiation patch and a metal ground, wherein the radiation patch is composed of two symmetrically distributed metal structures.
3. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, Both the first dielectric layer and the fourth dielectric layer are provided with a first metallized via and a second metallized via.
4. The bidirectional radiating antenna based on folded SIW feeding according to claim 3, characterized in that, The first metallized via of the first dielectric layer connects the ground of the first metal layer and the second metal layer, and the second metallized via connects upward to the radiating patch of the first metal layer and downward to the metal sheet of the second metal layer; the first metallized via of the fourth dielectric layer connects the ground of the sixth metal layer and the back radiating layer, and the second metallized via connects downward to the radiating patch of the back radiating layer and upward to the metal sheet of the sixth metal layer.
5. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, Both the second metal layer and the sixth metal layer are composed of metal sheets and metal ground.
6. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, Both the first and second dielectric adhesive layers have a third metallized via.
7. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, Both the third metal layer and the fifth metal layer have gaps.
8. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, Both the second dielectric layer and the third dielectric layer are provided with a fourth metallized via.
9. The bidirectional radiating antenna based on folded SIW feeding according to claim 8, characterized in that, The fourth metallized via of the second dielectric layer connects the third metal layer and the fourth metal layer; the fourth metallized via of the third dielectric layer connects the fourth metal layer and the fifth metal layer.
10. The bidirectional radiating antenna based on folded SIW feeding according to claim 1, characterized in that, The fourth metal layer has gaps.