CN216850326U - Ultra-wideband multiple-input multiple-output antenna with double-notch characteristic - Google Patents
Ultra-wideband multiple-input multiple-output antenna with double-notch characteristic Download PDFInfo
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- CN216850326U CN216850326U CN202123242390.8U CN202123242390U CN216850326U CN 216850326 U CN216850326 U CN 216850326U CN 202123242390 U CN202123242390 U CN 202123242390U CN 216850326 U CN216850326 U CN 216850326U
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Abstract
The utility model discloses an ultra wide band multiple input multiple output antenna with double trapped wave characteristic, including the antenna basement, the antenna basement up end is equipped with the antenna radiation layer, and the antenna radiation layer includes circular paster, the microstrip line of being connected with circular paster and the symmetry sets up the additional rectangular ring paster in microstrip line both sides, imbeds first U-shaped slot and second U-shaped slot on the circular paster in order to constitute antenna unit; the bottom end face of the antenna base is provided with a default ground, the position of the default ground corresponding to the microstrip line is provided with a horn-shaped notch, the position of the default ground vertical to the center line is provided with a rectangular notch, and the bottom end face of the antenna base is provided with an arc-shaped additional ground branch knot and an L-shaped ground branch knot. The utility model discloses introduce many notched structure, L shape ground minor matters, additional minor matters ground and additional rectangle ring paster by default, make antenna impedance bandwidth widen, the isolation improves and the trapped wave produces and realizes simultaneously to reach a good balance.
Description
Technical Field
The utility model relates to an antenna field, in particular to ultra wide band multiple input multiple output antenna with two trapped wave characteristics.
Background
At present, the three key problems to be solved in the development of the ultra-wideband multiple-input multiple-output antenna are to widen the bandwidth, improve the isolation and generate multiple trapped waves, and the difficulty is to widen the impedance bandwidth of the antenna, generate the multiple trapped waves, simultaneously reduce the size of the antenna, reduce the mutual coupling between antenna units and further improve the isolation of the antenna. In order to achieve the purpose, the existing bandwidth broadening technology mainly adopts various geometric shapes of monopole radiators and a default ground plane structure; the existing decoupling technology mainly adopts a separation ground plane, a layout mode, a neutralization line, conductor branches, an Electromagnetic Band Gap (EBG) structure, a decoupling network, a loading element, a loading metamaterial, a characteristic mode orthogonality and the like; the existing trapped wave generation method mainly adopts the technologies of slot gaps, parasitic branches and the like. However, with a single monopole technology, the impedance bandwidth broadening of the antenna is limited; the decoupling technology aiming at a certain frequency band is adopted, isolation is generated in a specific narrow frequency band, and the practical ultra-wideband antenna unit decoupling has defects; by adopting a single slot technology, the number of trapped waves generated by the antenna is limited, the coverage range of the trapped waves is not accurate enough, and the radiation performance of the antenna can be distorted.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a realize the bandwidth widen simultaneously, the isolation improves and the trapped wave produces the ultra wide band multiple input multiple output antenna that has two trapped wave characteristics.
The utility model provides a technical scheme of above-mentioned technical problem is: an ultra wide band multiple-input multiple-output antenna with a double-notch characteristic comprises an antenna substrate, wherein an antenna radiation layer is arranged on the upper end face of the antenna substrate and comprises a circular patch, a microstrip line connected with the circular patch and additional rectangular ring patches symmetrically arranged on two sides of the microstrip line, a first U-shaped slot and a second U-shaped slot are embedded in the circular patch, and the antenna radiation layer, the first U-shaped slot and the second U-shaped slot jointly form an antenna unit; the bottom end face of the antenna base is provided with a default ground, a horn-shaped notch is formed in the position, corresponding to the microstrip line, on the default ground, a rectangular notch is formed in the position, perpendicular to the center line, of the default ground, and a circular arc-shaped additional ground branch is formed in the position, corresponding to the circular patch, on the bottom end face of the antenna base, on the side, away from the microstrip line, of the circular patch.
According to the ultra-wideband multiple-input multiple-output antenna with the double-notch characteristic, two L-shaped ground branches are symmetrically arranged at the positions of two sides of the rectangular notch on the lower end surface of the antenna substrate.
According to the ultra wide band multiple input multiple output antenna with the double-notch characteristic, the antenna units are arranged in a unilateral symmetrical mode or in an opposite side symmetrical mode.
According to the ultra wide band multiple-input multiple-output antenna with the double-notch characteristic, the notches of the first U-shaped slot and the second U-shaped slot are oppositely arranged.
According to the ultra-wideband multiple-input multiple-output antenna with the double-trapped wave characteristic, the microstrip line is rectangular.
According to the ultra-wideband MIMO antenna with the double-notch characteristic, the material of the antenna substrate is glass fiber epoxy resin FR-4 or Rogers 3003.
In the ultra-wideband MIMO antenna with the double-notch characteristic, the ground, the arc-shaped additional ground branch and the L-shaped ground branch are all made of copper.
In the ultra-wideband multiple-input multiple-output antenna with the double-notch characteristic, the feed potential of the antenna unit is set to be near the intersection ending position of the microstrip line corresponding to the default ground.
The beneficial effects of the utility model reside in that:
1. the utility model discloses an introduce many incision technical improvements default ground structure, L shape ground branch knot, additional branch knot ground and additional rectangle ring paster, can produce accurate two trapped waves when widening the antenna bandwidth and solving the high cross coupling problem of antenna work when the low frequency band, make antenna impedance bandwidth widen, the isolation improves and the trapped wave produces and realizes simultaneously to reach a good balance.
2. The utility model discloses rectangle incision both sides position department symmetry is equipped with two L shape ground branches on the lower terminal surface of antenna base, and it is equipped with convex additional ground branches to correspond circular paster and keep away from microstrip line one side position department on the lower terminal surface of antenna base, and L shape ground branches can reduce the cross coupling between the antenna unit, and introduces convex additional ground branches and can further improve the isolation of antenna to improve the radiation characteristic of antenna.
3. The utility model discloses a fuse the geometrical structure of many notched default ground, convex additional ground minor matters and additional rectangle ring paster and can effectively widen antenna impedance bandwidth.
4. The utility model discloses a two U-shaped line of clearances of embedding in circular paster and correspond circular paster on the terminal surface under the antenna substrate and keep away from the convex additional ground branch festival that microstrip line one side position department set up and can produce two trapped wave characteristics.
5. The utility model discloses an antenna unit adopts unilateral symmetrical arrangement or opposite side symmetrical arrangement, can design to two ports when adopting unilateral symmetrical arrangement, when adopting bilateral symmetrical arrangement, can design to four ports.
Drawings
Fig. 1 is a front view of the geometry of the two-port antenna of the present invention.
Fig. 2 is a lower end front view of the geometry of the two-port antenna of the present invention.
Fig. 3 is a front view of the geometry of the four port configuration antenna of the present invention.
Fig. 4 is a front view of the lower end of the geometry of the four port configuration antenna of the present invention.
Fig. 5 is a side view of the antenna geometry.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1-5, an ultra wide band multiple input multiple output antenna with a double notch characteristic includes a rectangular antenna substrate 1, an antenna radiation layer is disposed on an upper end surface of the antenna substrate 1, the antenna radiation layer includes a circular patch 2, a rectangular microstrip line 3 connected to the circular patch 2, and additional rectangular ring patches 4 symmetrically disposed on two sides of the microstrip line 3, a first U-shaped slot 5 and a second U-shaped slot 6 are embedded in the circular patch 2, and slots of the first U-shaped slot 5 and the second U-shaped slot 6 are disposed oppositely; the antenna radiation layer, the first U-shaped slot 5 and the second U-shaped slot 6 jointly form an antenna unit; the lower end face of the antenna substrate 1 is provided with a default ground 8, a horn-shaped notch 10 is formed in the position, corresponding to the microstrip line 3, of the default ground 8, a rectangular notch 9 is formed in the position, perpendicular to the center line, of the default ground 8, and an arc-shaped additional ground branch 7 is formed in the position, corresponding to one side, away from the microstrip line 3, of the circular patch 2, of the lower end face of the antenna substrate 1. Two L-shaped ground branches 11 are symmetrically arranged at the two sides of the rectangular notch 9 on the lower end surface of the antenna substrate 1.
The material of the antenna substrate 1 is glass fiber epoxy resin FR-4 or Rogers 3003.
The ground 8, the arc-shaped additional branch 7 and the L-shaped ground branch 11 are all made of copper.
The feed potential of the antenna unit is set to be near the intersection ending position of the microstrip line 3 corresponding to the default ground 8.
The antenna units are arranged in a single-side symmetrical mode or in a symmetrical mode. The antenna units are arranged in a single-sided symmetrical manner to form a two-port ultra-wideband multiple-input multiple-output antenna, as shown in fig. 1 and 2; the antenna units are symmetrically arranged on opposite sides to form a four-port ultra-wideband multiple-input multiple-output antenna, as shown in fig. 3 and 4.
When the antenna is manufactured, an antenna radiation layer, a default ground 8, an arc-shaped additional branch 7 and an L-shaped ground branch 11 are respectively printed on an antenna substrate 1, and the ports of an antenna unit are connected with a feed through a 50-ohm standard SMA connector.
Claims (8)
1. An ultra wide band multiple-input multiple-output antenna with a double-notch characteristic is characterized by comprising an antenna substrate, wherein an antenna radiation layer is arranged on the upper end face of the antenna substrate, the antenna radiation layer comprises a circular patch, a microstrip line connected with the circular patch and additional rectangular ring patches symmetrically arranged on two sides of the microstrip line, a first U-shaped slot and a second U-shaped slot are embedded in the circular patch, and the antenna radiation layer, the first U-shaped slot and the second U-shaped slot jointly form an antenna unit; the antenna comprises an antenna substrate, a rectangular central line, a circular patch, a defected ground, a horn-shaped notch, a rectangular notch, an arc-shaped additional ground branch knot and a rectangular slot, wherein the defected ground is arranged on the lower end face of the antenna substrate, the horn-shaped notch is arranged at the position, corresponding to the microstrip line, of the defected ground, the rectangular notch is arranged at the position, perpendicular to the defected ground, of the central line, and the arc-shaped additional ground branch knot is arranged at the position, away from the microstrip line, of the lower end face of the antenna substrate, corresponding to the circular patch.
2. The UWB MIMO antenna with the double notch characteristic of claim 1, wherein two L-shaped ground branches are symmetrically arranged at two sides of the rectangular notch on the bottom end surface of the antenna substrate.
3. The UWB MIMO antenna with the dual notch characteristic of claim 1, wherein the antenna units are arranged in a single-side symmetrical arrangement or a side-to-side symmetrical arrangement.
4. The ultra-wideband multiple-input multiple-output antenna with the dual notch characteristic as claimed in claim 1, wherein the notches of the first U-shaped slot and the second U-shaped slot are oppositely arranged.
5. The UWB MIMO antenna with dual-notch characteristic of claim 1 wherein the microstrip line is rectangular.
6. The ultra-wideband multiple-input multiple-output antenna with the double notch characteristic as claimed in claim 1, wherein the material of the antenna substrate is glass fiber epoxy resin FR-4 or Rogers 3003.
7. The UWB MIMO antenna with the double notch characteristic of claim 1, wherein the materials of the defected ground, the arc-shaped additional ground branch and the L-shaped ground branch are all copper.
8. The UWB MIMO antenna with the dual-notch characteristic of claim 1 wherein the antenna element feed potential is set near the intersection end position of the microstrip line corresponding to the defect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123242390.8U CN216850326U (en) | 2021-12-22 | 2021-12-22 | Ultra-wideband multiple-input multiple-output antenna with double-notch characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123242390.8U CN216850326U (en) | 2021-12-22 | 2021-12-22 | Ultra-wideband multiple-input multiple-output antenna with double-notch characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216850326U true CN216850326U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123242390.8U Active CN216850326U (en) | 2021-12-22 | 2021-12-22 | Ultra-wideband multiple-input multiple-output antenna with double-notch characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216850326U (en) |
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2021
- 2021-12-22 CN CN202123242390.8U patent/CN216850326U/en active Active
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