An antenna switching circuit for positioning and electronic device

Abstract

This utility model relates to the field of positioning technology and discloses an antenna switching circuit and electronic device for positioning. The circuit includes: a signal processing module, including a transmitting port and three receiving ports; an antenna assembly, including multiple antennas; and multiple switching elements, divided into a first switching group and a second switching group. The first end of the first switching group is electrically connected to the transmitting port and the receiving port respectively, and the second end is electrically connected to multiple first ends of the second switching group. The second end of the second switching group is electrically connected to multiple antennas respectively. When the transmitting port is working, the connection state formed by the first switching group and the second switching group is used to connect the transmitting port to one of the multiple antennas. When the receiving port is working, the three receiving ports are respectively connected to three of the multiple antennas, providing a basis for subsequent selection of the antenna with the strongest transmitting performance and the antenna with the strongest receiving performance, which can improve the amount of received information and the timing accuracy, and thus is suitable for positioning in complex scenarios.

Description

Technical Field

[0001] This utility model relates to the field of positioning technology, and in particular to an antenna switching circuit and electronic device for positioning. Background Technology

[0002] With the rapid development of IoT technology, more and more terminals are connected to the network, enabling communication between people and things or between things themselves. Among them, UWB, as an emerging wireless communication technology, is favored for its advantages of high precision, low power consumption, and low cost, especially when combined with PDA products, where it demonstrates great advantages.

[0003] In modern digital work environments, PDA products have been widely used due to their convenient data acquisition and processing capabilities. However, most existing UWB chips have a single-transmitter, dual-receiver structure, which makes it difficult to acquire enough signals simultaneously in complex indoor environments, leading to a decrease in positioning accuracy. Therefore, even PDA products equipped with UWB positioning technology are currently unable to adapt to complex scenarios such as shopping malls, warehouses, and public transportation, limiting their effectiveness.

[0004] Therefore, improvements to existing technologies are necessary.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides an antenna switching circuit and electronic device for positioning, in order to solve the problems existing in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An antenna switching circuit for positioning includes:

[0009] The signal processing module includes one transmit port and three receive ports.

[0010] Antenna assembly, including multiple antennas;

[0011] Multiple switching elements are provided, which are divided into a first switching group and a second switching group. The first terminal of the first switching group is electrically connected to the transmitting port and the receiving port, respectively, and the second terminal is electrically connected to multiple first terminals of the second switching group. The second terminal of the second switching group is electrically connected to the multiple antennas.

[0012] When the transmitting port is working, the connection state formed by the first switch group and the second switch group is used to connect the transmitting port to one of the multiple antennas; when the receiving port is working, the three receiving ports are respectively connected to three of the multiple antennas.

[0013] Optionally, the switching element is a double-pole double-throw switch with two input terminals and two output terminals.

[0014] Optionally, the first switch group and the second switch group each include two switching elements, and the antenna switching circuit for positioning includes four antennas.

[0015] Optionally, in the first switch group, the four input terminals of the two switch elements are respectively connected to the one transmitting port and the three receiving ports, and the four output ports of the first switch group are respectively electrically connected to the four input ports of the second switch group.

[0016] In the second switch group, the four output ports of the two switch elements are respectively connected to the four antennas one by one.

[0017] Optionally, the first switch group and the second switch group are cross-connected, such that any switch element in the first switch group can be electrically connected to at least two switch elements in the second switch group, and the one transmitting port and the three receiving ports are respectively connected to one of the four antennas.

[0018] Optionally, the four antennas are distributed in different spatial locations.

[0019] Optionally, the system may also include multiple filtering circuits, wherein the first terminals of the multiple filtering circuits are connected one-to-one with the second terminals of the second switch group, and the second terminals of the multiple filtering circuits are connected one-to-one with the multiple antennas.

[0020] Optionally, the signal processing module is a UWB chip.

[0021] Optionally, the antenna switching circuit allows a UWB signal frequency range of 3.1 GHz to 10.6 GHz.

[0022] This invention also provides an electronic device, including an antenna switching circuit for positioning as described in any of the preceding claims.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This utility model provides an antenna switching circuit and electronic device for positioning. By setting up a signal processing module with one transmitter and three receivers, and cooperating with a switching network composed of multiple switching elements, it realizes a four-to-one connection of the transmitting port and a four-to-three parallel connection of the receiving port. This provides a basis for subsequent selection of the antenna with the strongest transmitting performance and the antenna with the strongest receiving performance, which can improve the amount of received information and the timing accuracy, and thus is suitable for positioning in complex scenarios.

[0025] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a circuit block diagram of an antenna switching circuit for positioning provided in an embodiment of the present invention.

[0028] Reference numerals: 10, signal processing module; 21, first switch group; 22, second switch group; 30, antenna assembly; 41, filter circuit. Detailed Implementation

[0029] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0030] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0031] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0032] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0033] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0034] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0035] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0036] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] Please refer to Figure 1 This utility model embodiment provides an antenna switching circuit for positioning, comprising:

[0039] Signal processing module 10, which includes one transmit port and three receive ports;

[0040] Antenna assembly 30 includes multiple antennas;

[0041] Multiple switching elements are divided into a first switch group 21 and a second switch group 22. The first end of the first switch group 21 is electrically connected to the transmitting port and the receiving port, respectively, and the second end is electrically connected to multiple first ends of the second switch group 22. The second end of the second switch group 22 is electrically connected to multiple antennas.

[0042] When the transmitting port is working, the connection state formed by the first switch group 21 and the second switch group 22 is used to connect the transmitting port to one of the multiple antennas; when the receiving port is working, the three receiving ports are respectively connected to three of the multiple antennas.

[0043] In this embodiment, the signal processing module 10 is a UWB chip.

[0044] Based on the aforementioned design, this embodiment uses a two-stage switch group connection to achieve flexible switching between the transmission and reception paths, providing a hardware foundation for flexible antenna switching. Therefore, when facing positioning challenges in complex scenarios, the transmitting port can be connected to the antenna with the best performance at any time, and the receiving port can be connected to the three antennas with the best reception effect.

[0045] like Figure 1As shown, based on signal strength, the antenna with the strongest signal is selected from ANT#1, ANT#2, ANT#3, and ANT#4 for switching. For example, if ANT#1 receives a signal strength of -95dBm and ANT#2 receives a signal strength of -90dBm, the signal will operate on the ANT#2 antenna because ANT#2 has a stronger signal. The switching flexibility of this structure stems from the interconnection method between the switch groups, allowing for rapid reconfiguration of the RF link under different communication states.

[0046] Compared with fixed connection methods, the hardware solution provided in this embodiment lays the foundation for dynamic matching of antennas and ports, improves signal quality and link stability, adapts to channel changes in complex environments, and thus improves positioning accuracy and communication reliability.

[0047] In some alternative implementations, the switching element is a double-pole double-throw (DPDT) switch with two inputs and two outputs, as shown in the figure. Each DPDT switch can achieve switchable dual-channel connection between the two inputs and the two outputs, thereby enabling simultaneous switching of two signals within a single device.

[0048] Specifically, the two inputs of a DPDT switch can be connected to transmit or receive signal paths, while the two outputs can be connected to another switch group or antenna port in the subsequent stage. By switching the internal contact positions of the switch, rapid switching between different outputs can be achieved while maintaining RF signal isolation and low-loss transmission. Compared to a single-pole double-throw (SPDT), the DPDT structure can complete the switching of more paths with fewer components, reducing wiring complexity and PCB space occupation, while improving the consistency and matching accuracy of RF paths.

[0049] In some alternative implementations, the first switch group 21 and the second switch group 22 each include two switching elements, and the antenna switching circuit for positioning includes four antennas.

[0050] Specifically, in the first switch group 21, the four input terminals of the two switching elements are respectively connected to one transmitting port and three receiving ports, and the four output ports of the first switch group 21 are respectively electrically connected to the four input ports of the second switch group 22.

[0051] In the second switch group 22, the four output ports of the two switching elements are connected to the four antennas one by one.

[0052] This one-to-one connection method allows all four ports of the signal processing module 10 to enter the input terminal of the second switch group 22 through the first switch group 21, and then switch to any antenna through the second switch group 22. This reduces signal loss and reflection during the switching process, improves the radio frequency performance after switching, and ensures high-quality transmission of the positioning signal.

[0053] In some alternative implementations, the first switch group 21 and the second switch group 22 are cross-connected, such that any switch element in the first switch group 21 can be electrically connected to at least two switch elements in the second switch group 22, and one transmit port and three receive ports are respectively connected to one of the four antennas.

[0054] In this embodiment, the cross-connection, as described above, breaks the fixed one-to-one mapping, enabling any input port to access multiple output paths. Combined with the dual-channel switching capability of the DPDT switching device, multiple connection states can be achieved under the same hardware architecture. Therefore, the optimal antenna combination can be flexibly selected according to the real-time signal quality, thereby significantly improving the system's anti-interference capability and positioning accuracy.

[0055] In some alternative implementations, the four antennas are distributed in different spatial locations, for example, on different sides of the electronic device, so that each antenna differs from the others in azimuth and polarization. When the device operates in different postures, some antennas may be in shadow areas or locations with strong reflection interference. By distributing the antennas, it can be ensured that at least some antennas are in a good signal coverage area in any posture, improving the signal stability and coverage of the system during dynamic use, which is especially suitable for positioning applications of handheld or mobile devices.

[0056] In some optional embodiments, the antenna switching circuit further includes a plurality of filter circuits 41, the first terminals of the plurality of filter circuits 41 being connected one-to-one with the second terminals of the second switch group 22, and the second terminals of the plurality of filter circuits 41 being connected one-to-one with the plurality of antennas.

[0057] In this embodiment, the filter circuit 41 is preferably a bandpass filter, used to suppress spurious signals and noise in non-operating frequency bands. By configuring the filter circuit 41 at the antenna front end, the signal-to-noise ratio of the receiving link can be significantly improved, the impact of interference signals on positioning accuracy can be reduced, and the subsequent circuits can be protected from excessive clutter.

[0058] In some alternative implementations, the antenna switching circuit allows a UWB signal frequency range of 3.1 GHz to 10.6 GHz.

[0059] This invention also provides an electronic device, including an antenna switching circuit for positioning as described in any of the above claims. This antenna switching circuit is applied in electronic devices, such as PDA products, handheld terminals, industrial positioners, etc.

[0060] When the electronic device integrates the aforementioned antenna switching circuit, it can operate stably in complex electromagnetic environments. Through dynamic antenna allocation and multi-path reception, it improves the continuity and accuracy of indoor and outdoor positioning. When the electronic device works in conjunction with the antenna switching circuit through the signal processing module 10, it can select the optimal antenna path for transmission and reception in real time. This reduces power consumption and switching delay while ensuring positioning accuracy, improving the device's flexibility and positioning performance. It is particularly suitable for applications in scenarios requiring high-precision positioning, such as warehousing, manufacturing, and logistics.

[0061] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this application and utilizing the content described in the text and drawings of this application, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of protection of this utility model.

Claims

1. An antenna switching circuit for positioning, characterized in that, include: The signal processing module includes one transmit port and three receive ports. Antenna assembly, including multiple antennas; Multiple switching elements are provided, which are divided into a first switching group and a second switching group. The first terminal of the first switching group is electrically connected to the transmitting port and the receiving port, respectively, and the second terminal is electrically connected to multiple first terminals of the second switching group. The second terminal of the second switching group is electrically connected to the multiple antennas. When the transmitting port is in operation, the connection state formed by the first switch group and the second switch group is used to connect the transmitting port to one of the multiple antennas; When the receiving port is in operation, the three receiving ports are respectively connected to three of the multiple antennas.

2. The antenna switching circuit for positioning according to claim 1, characterized in that, The switching element is a double-pole double-throw switch with two input terminals and two output terminals.

3. The antenna switching circuit for positioning according to claim 2, characterized in that, The first switch group and the second switch group each include two switching elements, and the antenna switching circuit for positioning includes four antennas.

4. The antenna switching circuit for positioning according to claim 3, characterized in that, In the first switch group, the four input terminals of the two switch elements are respectively connected to the one transmitting port and the three receiving ports, and the four output ports of the first switch group are respectively electrically connected to the four input ports of the second switch group. In the second switch group, the four output ports of the two switch elements are respectively connected to the four antennas one by one.

5. The antenna switching circuit for positioning according to claim 4, characterized in that, The first switch group and the second switch group are cross-connected, such that any switch element in the first switch group can be electrically connected to at least two switch elements in the second switch group, and that the one transmitting port and the three receiving ports are respectively connected to one of the four antennas.

6. The antenna switching circuit for positioning according to claim 3, characterized in that, The four antennas are distributed in different spatial locations.

7. The antenna switching circuit for positioning according to any one of claims 1 to 6, characterized in that, It also includes multiple filtering circuits, the first end of which is connected to the second end of the second switch group in a one-to-one correspondence, and the second end of which is connected to the multiple antennas in a one-to-one correspondence.

8. The antenna switching circuit for positioning according to claim 1, characterized in that, The signal processing module is a UWB chip.

9. The antenna switching circuit for positioning according to claim 8, characterized in that, The antenna switching circuit allows a UWB signal frequency range of 3.1 GHz to 10.6 GHz.

10. An electronic device, characterized in that, Includes the antenna switching circuit for positioning as described in any one of claims 1 to 9.

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