Antenna system and electronic device

Abstract

The application discloses an antenna system and an electronic device. The antenna system comprises an antenna body and a plurality of feeding ports arranged on the antenna body. A filter circuit is arranged at each feeding port. The filter circuit comprises a switching device and a filter device. The switching device is used for controlling the filtering mode of the filter device, so that the antenna system radiates electromagnetic waves of different frequencies. The filtering mode at least comprises high-pass filtering and low-pass filtering. Through the application, the isolation between the multi-antenna systems is realized without damaging the appearance of the antenna.

Description

Technical Field

[0001] This application generally relates to the field of antenna technology. More specifically, this application relates to an antenna system and electronic device. Background Technology

[0002] To improve signal performance and adapt to multi-band requirements, multi-antenna systems (i.e., covering different frequency bands) are often set up in electronic devices. Therefore, to ensure the communication quality of multi-antenna systems, isolation of these systems is often necessary.

[0003] Currently, for isolation of multi-antenna systems, slots or gaps are often introduced into the antenna structure to weaken coupling and reduce crosstalk. However, this method requires changes to the antenna structure, disrupting the antenna's appearance.

[0004] In view of this, there is an urgent need to provide an antenna system and electronic device that can achieve isolation between multiple antenna systems without damaging the appearance of the antenna. Utility Model Content

[0005] In order to at least solve one or more of the technical problems mentioned above, this application proposes an antenna system and electronic device in several aspects.

[0006] In a first aspect, this application provides an antenna system, comprising: an antenna body; and a plurality of feed ports disposed on the antenna body, each feed port being provided with a filter circuit, the filter circuit comprising a switching device and a filtering device, the switching device being used to control the filtering mode of the filtering device so that the antenna system radiates electromagnetic waves of different frequencies, wherein the filtering mode comprises at least high-pass filtering and low-pass filtering.

[0007] In some embodiments, the filter device includes at least one inductor L and / or at least one capacitor C.

[0008] In some embodiments, the switching device is a single-pole double-throw switch.

[0009] In some embodiments, the switching device includes a first single-pole double-throw (SPD) switch and a second SPD switch, and the filtering device includes an inductor L and a capacitor C; the first output terminal RF1 and the second output terminal RF2 of the first SPD switch are respectively connected to the two ends of the inductor L, and one end of the inductor L is connected to the second output terminal RF2 of the second SPD switch, and the other end is connected to the power supply port; the two ends of the capacitor C are respectively connected to the common terminal ANT of the first SPD switch and the common terminal ANT of the second SPD switch.

[0010] In some embodiments, when the common terminal ANT of the first single-pole double-throw switch is connected to the first output terminal RF1 of the first single-pole double-throw switch, and the common terminal ANT of the second single-pole double-throw switch is connected to the first output terminal RF1 of the second single-pole double-throw switch, the inductor L and the capacitor C are connected in series, the filtering method is low-pass filtering, and the antenna system radiates the first electromagnetic wave.

[0011] In some embodiments, the operating frequency band of the first electromagnetic wave covers the range of 2.4 GHz to 2.5 GHz.

[0012] In some embodiments, when the common terminal ANT of the first single-pole double-throw switch is connected to the second output terminal RF2 of the first single-pole double-throw switch, and the common terminal ANT of the second single-pole double-throw switch is connected to the second output terminal RF2 of the second single-pole double-throw switch, the inductor L and the capacitor C are connected in parallel, the filtering method is high-pass filtering, and the antenna system radiates the second electromagnetic wave.

[0013] In some embodiments, the operating frequency band of the second electromagnetic wave covers the range of 2.5 GHz to 2.69 GHz.

[0014] In some embodiments, the antenna body is an integral metal frame.

[0015] In a second aspect, this application provides an electronic device including an antenna system as described in the first aspect or any of the embodiments of the first aspect.

[0016] With the antenna system and electronic equipment provided above, the antenna system provided in this application, by setting a filtering circuit including switching devices and filtering devices in the antenna's feeding device, can use the switching devices to control the filtering mode of the filtering devices, so that the feeding path can achieve two states: equivalent open circuit and equivalent short circuit, according to actual needs. Thus, the antenna system can radiate electromagnetic waves of different frequencies (e.g., efficient coexistence of WiFi 2.4G and cellular Band 41 (2.5GHz–2.69GHz) bands), achieving isolation between multiple antenna systems without damaging the antenna appearance, and meeting the normal operation of the antenna. Furthermore, based on the above filtering circuit structure, by adjusting the parameter values ​​of the filtering devices, the radiation frequency of the antenna system can be extended to other cellular bands (e.g., LTE Band 7, NR n41) and WLAN systems (e.g., 5G WiFi). Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein: Figure 1 Exemplary structural block diagrams of antenna systems according to some embodiments of this application are shown; Figure 2 Example diagrams of antenna bodies according to some embodiments of this application are shown; Figure 3 The diagram illustrates the working principle of a single-pole double-throw switch according to some embodiments of this application. Figure 4 Example diagrams of filter circuits according to some embodiments of this application are shown; Figure 5 This paper shows an example diagram of an inductor L and a capacitor C connected in series according to some embodiments of this application; Figure 6 This application shows an example diagram of an inductor L and a capacitor C connected in parallel, representing some embodiments of the present application. Figure 7 An example diagram of the antenna body for low-pass filtering according to some embodiments of this application is shown; Figure 8 An example diagram of an antenna body for high-pass filtering according to some embodiments of this application is shown.

[0018] Explanation of reference numerals in the attached figures: Antenna system 100; Antenna body 110; Feed port 120; Filter circuit 130; switching device 1301; filtering device 1302. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0021] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0022] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0023] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] Exemplary application scenarios To improve signal performance and adapt to multi-band requirements, multi-antenna systems (i.e., covering different frequency bands) are often set up in electronic devices. Therefore, to ensure the communication quality of multi-antenna systems, isolation of these systems is often necessary.

[0025] Currently, for isolation of multi-antenna systems, slots or gaps are often introduced into the antenna structure to weaken coupling and reduce crosstalk. However, this method requires modifying the antenna structure, disrupting the antenna's appearance. Alternatively, a filter circuit with fixed parameters can be introduced into the antenna structure, but this circuit can only achieve filtering efficiency within a specific frequency band, thus improving isolation performance at a single frequency point and lacking flexibility.

[0026] In view of this, there is an urgent need to provide an antenna system that can achieve isolation between multiple antenna systems without compromising the appearance of the antenna, and can flexibly support different networks.

[0027] Figure 1 An exemplary structural block diagram of an antenna system according to some embodiments of this application is shown.

[0028] like Figure 1As shown, the antenna system 100 in this embodiment includes: an antenna body 110; and a plurality of feed ports 120 disposed on the antenna body 110. Each feed port 120 is provided with a filter circuit 130. The filter circuit 130 includes a switching device 1301 and a filtering device 1302. The switching device 1301 is used to control the filtering mode of the filtering device 1302 so that the antenna system 100 radiates electromagnetic waves of different frequencies. The filtering mode includes at least high-pass filtering and low-pass filtering.

[0029] For example, the antenna body 110 is an integral metal frame, which can be made of metal or alloy, etc. The integral metal frame can ensure the mechanical strength of the antenna body 110 and make the distribution of electromagnetic wave radiation field more uniform.

[0030] The antenna body 110 described above acts as a co-radiator, capable of radiating at least two different frequencies of electromagnetic waves. For example, it radiates electromagnetic waves of 2.4 GHz to 2.5 GHz to enable the antenna system 100 to operate in WiFi 2.4G, and radiates electromagnetic waves of 2.5 GHz to 2.69 GHz to enable the antenna system 100 to operate in cellular communication Band 41.

[0031] Figure 2 Example diagrams of antenna bodies according to some embodiments of this application are shown. Figure 2 As shown, the antenna body 110 is a metal frame surrounded by metal traces, on which multiple feed ports 120 are provided, for example, Figure 2 The eight power supply ports 120 (i.e., power supply port 1, power supply port 2, power supply port 3, power supply port 4, power supply port 5, power supply port 6, power supply port 7 and power supply port 8).

[0032] Figure 2 In the diagram, the solid line points to the feed port 120, which is used to radiate the electromagnetic waves required for cellular communication Band41, while the dashed line points to the feed port 120, which is used to radiate the electromagnetic waves required for WiFi 2.4G.

[0033] In this embodiment of the application, in order to achieve isolation of the multi-antenna system without damaging the antenna body 110, a filter circuit 130 can be set at each feed port 120, that is, each feed port 120 is electrically connected to an independent filter circuit 130, and the antenna body 110 can switch radiation between electromagnetic waves of different frequencies through the topology switching of the filter circuit 130.

[0034] Exemplarily, the filter circuit 130 includes a switching device 1301 and a filter device 1302. In this embodiment, the filter device 1302 includes at least one inductor L and / or at least one capacitor C, wherein the capacitance value of capacitor C and the inductance value of inductor L can be set according to the frequency of the electromagnetic wave that the antenna body 110 actually radiates. This embodiment is described only as an example where the filter device 1302 includes one inductor L and one capacitor C.

[0035] The aforementioned switching device 1301 can be a single-pole double-throw switch, a single-pole four-throw switch, etc., and its quantity can be only one or at least two. This application embodiment does not make a specific limitation on this. In this application embodiment, two single-pole double-throw switches (denoted as the first single-pole double-throw switch and the second single-pole double-throw switch) are used as the switching device 1301 of the filter circuit 130.

[0036] Figure 3 The diagram illustrates an example of the working principle of a single-pole double-throw switch according to some embodiments of this application.

[0037] like Figure 3 As shown, a single-pole double-throw switch includes: V1 terminal, VDD terminal, RF1 terminal, RF2 terminal, ANT terminal (common terminal), and ground terminal (GND). Figure 3 (Not shown in the diagram). VDD is the positive power supply terminal, providing the operating voltage to the chip and ensuring normal circuit operation. The ground terminal is the circuit's reference ground, used to stabilize signals and power supply and release excess charge. V1 is the control voltage input terminal; the connection between ANT and RF1 or RF2 can be selected by controlling the high or low level of V1. Specifically, when V1 is low, ANT is connected to RF1; when V1 is high, ANT is connected to RF2.

[0038] Based on the above embodiments of this application, the switching device 1301 includes a first single-pole double-throw switch and a second single-pole double-throw switch, and the filtering device 1302 includes an inductor L and a capacitor C. The following describes... Figure 4 The example diagrams of the filter circuit 130 shown in some embodiments of this application describe the connection relationships of the devices in the filter circuit 130, specifically: like Figure 4 As shown, the first single-pole double-throw switch ( Figure 3 The first output terminal RF1 and the second output terminal RF2 of the single-pole double-throw switch on the left are respectively connected to the two ends of the inductor L, and one end of the inductor L is connected to the second single-pole double-throw switch ( Figure 3The second output terminal RF2 of the single-pole double-throw switch on the right is connected, and the other end is connected to the feed port 120; the two ends of the capacitor C are respectively connected to the common terminal ANT of the first single-pole double-throw switch and the common terminal ANT of the second single-pole double-throw switch, and the inductor L is connected to the first output terminal RF1 of the first single-pole double-throw switch and the second output terminal RF2 of the second single-pole double-throw switch, and is connected to the control chip (e.g., SOC chip) of the electronic device where the antenna system 100 is located, so that it can transmit signals with the control chip, and the first output terminal RF1 of the second single-pole double-throw switch is also grounded.

[0039] Based on the description of the filter circuit 130 above, the switching device 1301 can be used to control the filtering mode of the filtering device 1302. That is, different filtering modes can be achieved by controlling the connection path of the two single-pole double-throw switches so that the antenna system 100 radiates electromagnetic waves of different frequencies. The filtering modes here can include high-pass filtering and low-pass filtering.

[0040] Specifically, when the common terminal ANT of the first single-pole double-throw switch is connected to the first output terminal RF1 of the first single-pole double-throw switch, and the common terminal ANT of the second single-pole double-throw switch is connected to the first output terminal RF1 of the second single-pole double-throw switch, the inductor L and the capacitor C are connected in series. At this time, the filtering method of the filter circuit 130 is low-pass filtering, that is, low-frequency signals are allowed to pass while high-frequency signals are suppressed. The antenna system 100 radiates the first electromagnetic wave, and the operating frequency band of the first electromagnetic wave covers the range of 2.4GHz to 2.5GHz, which is compatible with WiFi 2.4G.

[0041] Figure 5 An example diagram of an inductor L and a capacitor C connected in series is shown for some embodiments of this application. Figure 5 As shown, Figure 5 The red line in the diagram represents the series connection of inductor L and capacitor C. After the series connection of inductor L and capacitor C is grounded, this power supply path can be considered as an equivalent open circuit.

[0042] Figure 7 Example diagrams of low-pass filtering antenna bodies according to some embodiments of this application are shown. Figure 7 As shown, the feed paths at feed ports 2, 4, 6, and 8 are all equivalent short circuits, thereby activating the cellular channel and ensuring signal radiation in the cellular Band 41 band.

[0043] When the common terminal ANT of the first single-pole double-throw switch is connected to the second output terminal RF2 of the first single-pole double-throw switch, and the common terminal ANT of the second single-pole double-throw switch is connected to the second output terminal RF2 of the second single-pole double-throw switch, the inductor L and the capacitor C are connected in parallel. At this time, the filtering mode of the filter circuit 130 is high-pass filtering, which allows high-frequency signals to pass through while suppressing low-frequency signals. The antenna system 100 radiates the second electromagnetic wave, and the operating frequency band of the second electromagnetic wave covers the range of 2.5GHz to 2.69GHz, which is compatible with the cellular band 41.

[0044] Figure 6 This application shows an example diagram of an inductor L and capacitor C connected in parallel, representing some embodiments of the present application; as shown... Figure 6 As shown, Figure 6 The red line in the diagram represents the parallel connection of inductor L and capacitor C. After the parallel connection of inductor L and capacitor C is grounded, this power supply path can be considered as an equivalent short circuit.

[0045] Figure 8 Example diagrams of antenna bodies for high-pass filtering according to some embodiments of this application are shown. Figure 8 As shown, the power supply paths at power supply ports 2, 4, 6 and 8 are all equivalent to open circuits, which means that only the WiFi antenna channel can be kept working to ensure the signal radiation of the WiFi 2.4G band.

[0046] Based on the description of the antenna system 100 above, even if WiFi 2.4G and cellular Band 41 have the same frequency of 2.5GHz, the coexistence and isolation of WiFi 2.4G and cellular Band 41 can be achieved by switching the switching device, thus avoiding mutual interference between WiFi 2.4G and cellular Band 41.

[0047] The antenna system provided in this application incorporates a filtering circuit, including switching devices and filtering components, in the antenna's feeding device. The switching devices control the filtering mode of the filtering components, allowing the feeding path to achieve both equivalent open-circuit and equivalent short-circuit states according to actual needs. This enables the antenna system to radiate electromagnetic waves of different frequencies (e.g., efficient coexistence of WiFi 2.4G and cellular Band 41 (2.5GHz–2.69GHz) bands), achieving isolation between multiple antenna systems without damaging the antenna's appearance and ensuring normal antenna operation. Furthermore, based on the aforementioned filtering circuit structure, by adjusting the parameter values ​​of the filtering components, the antenna system's radiation frequency can be extended to other cellular bands (e.g., LTE Band 7, NR n41) and WLAN systems (e.g., 5G WiFi).

[0048] This application also provides an electronic device that includes the antenna system 100 described in the above embodiments. This electronic device can be a smartphone, tablet computer, smartwatch, smart glasses, etc., and this application does not specifically limit it to any particular type.

[0049] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An antenna system, characterized in that, include: Antenna body; as well as Multiple feed ports are provided on the antenna body, and each feed port is equipped with a filter circuit. The filter circuit includes a switching device and a filtering device. The switching device is used to control the filtering mode of the filtering device so that the antenna system radiates electromagnetic waves of different frequencies. The filtering mode includes at least high-pass filtering and low-pass filtering.

2. The antenna system according to claim 1, characterized in that, The filter device includes at least one inductor L and / or at least one capacitor C.

3. The antenna system according to claim 2, characterized in that, The switching device is a single-pole double-throw switch.

4. The antenna system according to claim 3, characterized in that, The switching device includes a first single-pole double-throw switch and a second single-pole double-throw switch, and the filtering device includes an inductor L and a capacitor C; The first output terminal RF1 and the second output terminal RF2 of the first single-pole double-throw switch are respectively connected to the two ends of the inductor L, and one end of the inductor L is connected to the second output terminal RF2 of the second single-pole double-throw switch, and the other end is connected to the power supply port. The two ends of the capacitor C are respectively connected to the common terminal ANT of the first single-pole double-throw switch and the common terminal ANT of the second single-pole double-throw switch.

5. The antenna system according to claim 4, characterized in that, When the common terminal ANT of the first single-pole double-throw switch is connected to the first output terminal RF1 of the first single-pole double-throw switch, and the common terminal ANT of the second single-pole double-throw switch is connected to the first output terminal RF1 of the second single-pole double-throw switch, the inductor L and the capacitor C are connected in series, the filtering method is low-pass filtering, and the antenna system radiates the first electromagnetic wave.

6. The antenna system according to claim 5, characterized in that, The operating frequency band of the first electromagnetic wave covers the range of 2.4 GHz to 2.5 GHz.

7. The antenna system according to claim 4, characterized in that, When the common terminal ANT of the first single-pole double-throw switch is connected to the second output terminal RF2 of the first single-pole double-throw switch, and the common terminal ANT of the second single-pole double-throw switch is connected to the second output terminal RF2 of the second single-pole double-throw switch, the inductor L and the capacitor C are connected in parallel, the filtering method is high-pass filtering, and the antenna system radiates the second electromagnetic wave.

8. The antenna system according to claim 7, characterized in that, The operating frequency band of the second electromagnetic wave covers the range of 2.5 GHz to 2.69 GHz.

9. The antenna system according to claim 1, characterized in that, The antenna body is a one-piece metal frame.

10. An electronic device, characterized in that, Including the antenna system as described in any one of claims 1-9.

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