CN115842236A - High-isolation collinear polarization full-duplex packaging antenna - Google Patents
High-isolation collinear polarization full-duplex packaging antenna Download PDFInfo
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- CN115842236A CN115842236A CN202211454475.9A CN202211454475A CN115842236A CN 115842236 A CN115842236 A CN 115842236A CN 202211454475 A CN202211454475 A CN 202211454475A CN 115842236 A CN115842236 A CN 115842236A
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Abstract
A high isolation co-linear polarization full duplex packaged antenna, comprising: the antenna comprises a TX array antenna radiation unit, an RX array antenna radiation unit, a TX array antenna feeder, an RX array antenna feeder, a decoupling ring structure and a grounding layer, wherein the TX array antenna radiation unit, the RX array antenna radiation unit, the TX array antenna feeder and the RX array antenna feeder are symmetrically arranged on one side of a substrate structure, the decoupling ring structure is positioned on a symmetry axis of the TX array antenna radiation unit, the RX array antenna feeder and the decoupling ring structure are arranged on the other side of the substrate structure, and the grounding layer is arranged on the other side of the substrate structure, wherein: the TX array antenna feed line and the RX array antenna feed line are connected to the ground plane through a TX feed hole structure and an RX feed hole structure, respectively. The invention has the characteristics of facing to inductive-pass integration, meeting the requirements of miniaturization, high integration and high isolation, the electric field radiation direction of the feed port of the invention is mutually orthogonal to the patch radiation direction, and the decoupling ring structure is arranged at the transceiving port, thus realizing the isolation of 67.5dB.
Description
Technical Field
The invention relates to a technology in the field of full-duplex antennas, in particular to a collinear polarization full-duplex packaged Antenna (AiP) with the isolation degree reaching 67.5dB.
Background
The design of the traditional simultaneous same-frequency radio frequency system is mostly applied to a communication system, the system size is large, and the requirements of a short-distance radar sensing system on miniaturization and high integration level cannot be met. With the increasing maturity of semiconductor technology, aiP technology is mostly adopted in terms of high integration and miniaturization design of antennas. In order to adapt to the development trend of high integration, miniaturization and communication-oriented integration, a full-duplex antenna which can be simultaneously applied to the communication field and the near-range radar sensing field and meets the requirements of miniaturization, high integration and high isolation is designed, and the efficient resource utilization is realized, so that the full-duplex antenna has important research value.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-isolation collinear polarization full-duplex packaging Antenna (AiP), which has the characteristics of facing to inductive-communication integration, meeting the requirements of miniaturization, high integration and high isolation, the electric field radiation direction of a feed port of the antenna is orthogonal to the patch radiation direction, and a decoupling ring structure is arranged at a transceiving port, so that the isolation degree of 67.5dB can be realized.
The invention is realized by the following technical scheme:
the invention relates to a high-isolation collinear polarization full duplex packaging antenna, which comprises: the antenna comprises a TX array antenna radiation unit, an RX array antenna radiation unit, a TX array antenna feeder, an RX array antenna feeder, a decoupling ring structure and a grounding layer, wherein the TX array antenna radiation unit, the RX array antenna radiation unit, the TX array antenna feeder and the RX array antenna feeder are symmetrically arranged on one side of a substrate structure, the decoupling ring structure is positioned on a symmetry axis of the TX array antenna radiation unit, the RX array antenna feeder and the decoupling ring structure are arranged on the other side of the substrate structure, and the grounding layer is arranged on the other side of the substrate structure, wherein: the TX array antenna feed line and the RX array antenna feed line are connected to the ground plane through a TX feed hole structure and an RX feed hole structure, respectively.
The TX array antenna radiation unit and the RX array antenna radiation unit respectively comprise an array structure formed by 1 x 2 patch units.
The TX array antenna feeder line and the RX array antenna feeder line are both formed by impedance transformers with different lengths and are used for port matching and equal-amplitude in-phase excitation. The current direction of the feeder line during operation and the radiation direction of the antenna are orthogonal to each other, and the purpose is to improve the port isolation to a certain extent.
The decoupling ring structure is a bent orthogonal coupler and is used for removing the influence of surface waves and space waves on the receiving and transmitting isolation.
Technical effects
The invention is manufactured based on TMV processing technology, can realize that the size of the co-linear polarization full-duplex antenna manufactured in a miniaturized, high-precision and batch mode is only 25mm multiplied by 20mm multiplied by 0.44mm, and the isolation of TX/RX is as high as 67.5dB. The method is a research hotspot in the communication field and the communication integrated scene recently, and has a good development prospect.
Drawings
FIG. 1 is a schematic view of a single layer panel configuration of AiP of the present invention;
fig. 2 is a front view of the antenna structure of the present embodiment;
in the figure: a TX array antenna radiation unit 1, an RX array antenna radiation unit 2, TX array antenna feed lines 3, an RX array antenna feed line 4, a decoupling ring structure 5, a substrate structure 6, a TX feed hole structure 7, an RX feed hole structure 8, a ground layer 9;
FIG. 3 is a diagram of an application scenario of the present invention;
FIG. 4 is a graph showing simulation results of the reflection coefficient and TX/RX isolation of the antenna of this embodiment;
fig. 5 is a diagram showing simulation and test results of the S parameter of the antenna of the present embodiment;
fig. 6 is a graph showing the results of the gain simulation and test of the antenna of the present embodiment.
Detailed Description
As shown in fig. 1, a high-isolation collinear polarization full-duplex packaged Antenna (AiP) with a center frequency of 24GHz according to this embodiment adopts a bottom-feed feeding method, which includes: the TX array antenna radiating element 1, RX array antenna radiating element 2, TX array antenna feed line 3, RX array antenna feed line 4, which are symmetrically disposed on one side of the substrate structure 6, and the decoupling ring structure 5 located on the symmetry axis thereof, and the ground layer 9 disposed on the other side of the substrate structure 6, wherein: the TX array antenna feed line 3 and the RX array antenna feed line 4 are connected to the ground plane 9 through a TX feed aperture structure 7 and an RX feed aperture structure 8, respectively.
The TX array antenna radiation unit 1 and the RX array antenna radiation unit 2 both include an array structure formed by 1 × 2 patch units, the length of each patch unit is 3.23mm, the width of each patch unit is 3.9mm, the center distance between adjacent patches is 7.2mm, and the distance between the transceiving ports is 3mm.
The TX array antenna feeder line 3 and the RX array antenna feeder line 4 are both composed of impedance transformers with different lengths and are used for port matching and equal-amplitude in-phase excitation. The current direction of the feeder line and the radiation direction of the antenna are orthogonal to each other, and the purpose is to improve the port isolation degree to a certain extent.
The decoupling ring structure 5 is a bent orthogonal coupler and is used for removing the influence of surface waves and space waves on the receiving and transmitting isolation.
The substrate structure 6 is made of an EMC substrate material, the dielectric constant of the substrate structure is 3.69, and the loss tangent angle of the substrate structure is 0.006.
The TX feed hole structure 7 and the RX feed hole structure 8 are manufactured based on a TMV process, the dielectric constant of a substrate material at the position of 0.6mm multiplied by 0.4mm around the feed hole is 4.4, the loss tangent angle is 0.01, and the aperture of the feed hole is 0.16mm.
The grounding layer 9 is made of rectangular metal copper with the thickness of 20mm multiplied by 25mm, 2 openings are arranged below corresponding TX/RX feeder lines, and the aperture is 0.4mm.
The total size of the full-duplex packaged antenna is about 20mm × 25mm × 0.44mm.
As shown in fig. 2, the electric field radiation direction of the feed port is orthogonal to the patch radiation direction, so as to improve the port isolation to a certain extent. In order to further improve the port isolation, a decoupling ring structure is arranged at the transceiving port by combining a surface treatment technology and is used for removing the influence of surface waves and space waves on the transceiving isolation. By optimizing the size parameters of the decoupling rings, decoupling points are created at the resonant frequency, and the effect of high isolation in the working frequency is achieved.
Fig. 3 is a view of a scene of the antenna of the present embodiment integrated with the antenna. In the simultaneous co-frequency full duplex system oriented to the inductive-communication integration, the receiving/transmitting antenna not only needs to meet the high isolation characteristic of a wireless communication system, but also needs to meet the requirements of radar sensing on polarization and bandwidth. In a close range radar sensing system, the polarization direction of the signal changes with the change of the backscattered signal after hitting the target. For example: when the polarization of the transmitted signal is vertical polarization, the received signal will be backscattered as vertical polarization; when the polarization of the transmitted signal is horizontally polarized, the received signal will be backscattered as horizontally polarized. Therefore, the polarization mode of the inductive-coupling integrated simultaneous co-frequency full-duplex antenna should be co-linear polarization. Therefore, the full-duplex antenna applied to the inductive-communication integrated scene needs to meet the polarization requirement of collinear polarization.
As shown in fig. 4, the simulation results of the reflection coefficient and TX/RX isolation of the antenna of the present embodiment are shown. It is evident from the figure that the reflection coefficient of the proposed full-duplex antenna is below-10 dB in the range of 23.85-24.2GHz, indicating that the presence of the decoupling loop structure has little negative impact on the impedance matching performance. It is worth noting that with the addition of the decoupling loop structure, the TX/RX isolation expands from 33dB to 67.5dB due to the suppression of the space and surface waves.
Fig. 5 is a diagram showing simulation and test results of the S parameter of the antenna of the present embodiment. It can be seen from the figure that the simulated and tested reflection losses of the designed antenna are below-10 dB in the range of 24.3-24.5 GHz.
Fig. 6 is a graph showing the results of the gain simulation and test of the antenna of the present embodiment. Simulation and test results show that the simulated and measured maximum TX/RX isolation for the narrow band antenna is 65dB and 50dB, respectively. The experimental result is basically consistent with the simulation result, and the effectiveness of the design method and the accuracy of the processing technology are proved. The simulated maximum gain was about 8.1dBi, and the maximum gain of the tested antenna was about 8.3dBi compared to the standard feedhorn gain. The simulated maximum sidelobe level is about 20dB and the tested maximum sidelobe level is about 15dB. The aperture efficiencies of the antenna arrays were 26.7%, respectively. The simulation result is well matched with the actual measurement result, and the feasibility of the design method and the accuracy of the processing technology are proved.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. A high isolation co-linear polarization full duplex packaged antenna, comprising: the antenna comprises a TX array antenna radiation unit, an RX array antenna radiation unit, a TX array antenna feeder, an RX array antenna feeder, a decoupling ring structure and a grounding layer, wherein the TX array antenna radiation unit, the RX array antenna radiation unit, the TX array antenna feeder and the RX array antenna feeder are symmetrically arranged on one side of a substrate structure, the decoupling ring structure is positioned on a symmetry axis of the TX array antenna radiation unit, the RX array antenna feeder and the decoupling ring structure are arranged on the other side of the substrate structure, and the grounding layer is arranged on the other side of the substrate structure, wherein: the TX array antenna feed line and the RX array antenna feed line are connected to the ground plane through a TX feed hole structure and an RX feed hole structure, respectively.
2. The high-isolation collinear polarization full-duplex packaged antenna as claimed in claim 1, wherein the TX array antenna radiating unit and the RX array antenna radiating unit each comprise an array structure formed by 1 × 2 patch elements and a power divider, and a current direction of the power divider during operation is orthogonal to a radiation direction of the antenna, so as to improve port isolation to some extent.
3. The high isolation collinear polarization full duplex packaged antenna according to claim 1, wherein the TX array antenna feed line and the RX array antenna feed line are both formed by impedance transformers with different lengths, and are used for port matching and constant amplitude in-phase excitation.
4. The high isolation co-linear polarization full-duplex packaged antenna as in claim 1, wherein the decoupling ring structure is a folded quadrature coupler for removing the effect of surface waves and space waves on the transmit and receive isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454475.9A CN115842236A (en) | 2022-11-21 | 2022-11-21 | High-isolation collinear polarization full-duplex packaging antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454475.9A CN115842236A (en) | 2022-11-21 | 2022-11-21 | High-isolation collinear polarization full-duplex packaging antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115842236A true CN115842236A (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211454475.9A Pending CN115842236A (en) | 2022-11-21 | 2022-11-21 | High-isolation collinear polarization full-duplex packaging antenna |
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| Country | Link |
|---|---|
| CN (1) | CN115842236A (en) |
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- 2022-11-21 CN CN202211454475.9A patent/CN115842236A/en active Pending
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