Co-radiator dual antenna

Abstract

A co-radiator dual antenna includes a radiator unit, a first feed unit, a second feed unit, a sensing module, and a grounding unit. The first feed unit and the second feed unit are coupled with the radiator unit respectively. The sensing module is connected to a substantially central position of the radiator unit, and the sensing module is used to sense a distance between the radiator unit and an external object through the radiator unit. The grounding unit is connected with the sensing module. The first feed unit and the second feed unit are used to jointly transmit or receive a first radio frequency signal or a second radio frequency signal with the radiator unit respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to a dual antenna of a common radiator, in particular, a dual antenna of a common radiator applied to a specific adsorption rate (SAR) test. BACKGROUND

[0002] Generally, in order to avoid the electromagnetic wave generated by a communication electronic product such as a mobile phone or a tablet computer from affecting human health, these electronic products need to pass the SAR test. In the prior art, a sensing module is electrically connected to the antenna of the electronic product to detect the interval distance between the antenna and the human body, and the output power of the radio frequency signal is adjusted according to the interval distance to meet the specifications of the SAR test. Since the radio frequency signal used for communication is a high frequency signal, and the sensing module detects the change of the capacitance value of the antenna radiator to determine the interval distance, which is a low frequency signal, therefore a capacitor needs to be added between the antenna radiator and the ground plane to isolate the high and low frequency signals and avoid mutual interference.

[0003] However, the capacitor added in the prior art is generally a ceramic capacitor, and its capacitance value varies with the operating frequency of the antenna, which is about several tens of pF, close to the upper limit of the capacitance value that the sensing module can detect, so the added capacitor affects the detection capability of the sensing module, reducing the maximum interval distance that can be detected. Therefore, how to provide a dual antenna of a common radiator that can isolate high and low frequency signals without affecting the interval distance detection capability has become an urgent problem to be solved in the industry. SUMMARY

[0004] To solve the various problems of the prior art, one object of the present application is to provide a dual antenna of a common radiator that can isolate high and low frequency signals without affecting the interval distance detection capability.

[0005] To achieve the foregoing object, the dual antenna of a common radiator of the present application comprises a radiator unit, a first feed-in unit, a second feed-in unit, a sensing module, and a grounding unit.

[0006] In an embodiment of the present application, the first feed-in unit is coupled to the radiator unit; the second feed-in unit is coupled to the radiator unit; the sensing module is connected to the substantially central position of the radiator unit, and the sensing module is used to sense the interval distance between the radiator unit and an external object through the radiator unit; and the grounding unit is connected to the sensing module, wherein the first feed-in unit is used to jointly transmit or receive a first radio frequency signal with the radiator unit, and the second feed-in unit is used to jointly transmit or receive a second radio frequency signal with the radiator unit.

[0007] In an embodiment of the present application, the first feed-in unit and the second feed-in unit are symmetrical.

[0008] In an embodiment of the present application, the first feeding unit and the second feeding unit are loop antennas, monopole antennas or PIFA (Planar Inverted-F Antenna) antennas.

[0009] In an embodiment of the present application, the length of the coupling part between the first feeding unit or the second feeding unit and the radiator unit is less than or equal to 1 / 4 wavelength.

[0010] In an embodiment of the present application, the co-radiator dual antenna further comprises a first radio frequency signal module and a second radio frequency signal module. The first radio frequency signal module is connected to the first feeding unit to generate or receive a first radio frequency signal, and the second radio frequency signal module is connected to the second feeding unit to generate or receive a second radio frequency signal. The first radio frequency signal module and the second radio frequency signal module are further connected to the grounding unit.

[0011] In an embodiment of the present application, the sensing module is further used to generate a distance signal according to the distance from the external object, and the first radio frequency signal module and the second radio frequency signal module are further used to adjust the output power of the first radio frequency signal or the second radio frequency signal, respectively, according to the distance signal.

[0012] In an embodiment of the present application, the radiator unit is in a rectangular structure.

[0013] In an embodiment of the present application, the length of the radiator unit is less than or equal to 1 / 2 wavelength.

[0014] In an embodiment of the present application, the co-radiator dual antenna further comprises at least one connecting capacitor, which is connected between the first feeding unit and the radiator unit, or connected between the second feeding unit and the radiator unit.

[0015] In an embodiment of the present application, the co-radiator dual antenna further comprises at least one connecting inductor, which is connected between the sensing module and the radiator unit.

[0016] Compared with the prior art, the sensing module of the co-radiator dual antenna of the present application is connected to the substantial center position of the radiator unit. Since the radio frequency signals of the first radio frequency signal module and the second radio frequency signal module will be severely attenuated at the center position of the radiator unit, the sensing ability of the sensing module will not be affected. At the same time, the sensing module connected to this position will not affect the performance of the first radio frequency signal module and the second radio frequency signal module, so there is no need to add a capacitor or an inductor between the sensing module and other units to isolate high and low frequency signals, which can reduce the overall volume and cost, and improve the sensing distance of the sensing module. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 This is a schematic diagram of the architecture of the co-radiator dual antenna according to the first embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the architecture of a co-radiator dual antenna according to the second embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the frequency response of a common-radiator dual-antenna according to the third embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the current at the first operating frequency according to the fourth embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the current at the second operating frequency according to the fifth embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the architecture of a common radiator dual antenna according to the sixth embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the frequency response of a common-radiator dual-antenna according to the seventh embodiment of the present invention.

[0024] Symbol explanation:

[0025] 10 radiating body units

[0026] 11 First Feed Unit

[0027] 12 Second Feed Unit

[0028] 13 Sensing Modules

[0029] 14 Grounding Unit

[0030] 15 First Radio Frequency Signal Module

[0031] 16 Second Radio Frequency Signal Module

[0032] C1 and C2 are connected to capacitors

[0033] D1 Length

[0034] D2 Length

[0035] L connects to the inductor Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different embodiments.

[0037] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings accompanying the present disclosure are merely intended to assist in the understanding of the present disclosure and are not intended to limit the scope of the present disclosure, and therefore, any modification, change in proportion, or adjustment in size that does not affect the effects and purposes of the present disclosure should be included in the scope of the present disclosure. Meanwhile, the terms such as "upper", "inner", "outer", "bottom", and "one" used in the present disclosure are merely for the convenience of clear description, and are not intended to limit the scope of the present disclosure, and any modification or adjustment of the relative relationship without substantial change in technical content is also considered to be within the scope of the present disclosure, and it is hereby stated in advance.

[0038] Referring to Figure 1 FIG. 1 is a schematic diagram of a co-radiator dual antenna according to an embodiment of the present disclosure. As shown in the figure, the co-radiator dual antenna according to the present disclosure includes a radiator unit 10, a first feed unit 11, a second feed unit 12, a sensing module 13, and a grounding unit 14.

[0039] In an embodiment, the first feed unit 11 is coupled to the radiator unit 10, and the second feed unit 12 is coupled to the radiator unit 10. The first feed unit 11 is configured to transmit or receive a first radio frequency signal together with the radiator unit 10, and the second feed unit 12 is configured to transmit or receive a second radio frequency signal together with the radiator unit 10. The first radio frequency signal and the second radio frequency signal have one of the operating frequencies, and can be in the same frequency band or different frequency bands. For example, the first radio frequency signal or the second radio frequency signal can be an electromagnetic wave signal based on the Wi-Fi frequency band, the LTE frequency band, or the 5G New Radio frequency band standard, but the present disclosure is not limited thereto. In addition, the radiator unit 10 helps to isolate the first radio frequency signal and the second radio frequency signal.

[0040] The sensing module 13 is connected to a substantially central position of the radiator unit 10, and is configured to sense a separation distance between the radiator unit 10 and an external object (e.g., a human body) through the radiator unit 10. The grounding unit 14 is connected to the sensing module 13. When the external object approaches, the sensing module 13 can sense a change in the parasitic capacitance generated by the radiator unit 10, thereby determining the separation distance between the sensing radiator unit 10 and the external object. If the position at which the sensing module 13 is connected to the radiator unit 10 is not at the central position of the radiator unit 10, frequency offset will occur.

[0041] On the other hand, since the first radio frequency signal or the second radio frequency signal has been severely attenuated when passing through the center position of the radiator unit 10, it does not affect the sensing capability of the sensing module 13, so there is no need to add a capacitor or an inductor between the sensing module 13 and other units to isolate high and low frequency signals as in the prior art, which can reduce the overall size and cost, and improve the sensing distance of the sensing module 13.

[0042] Furthermore, the prior art uses a lumped capacitor component with a high Q value (Quality factor), which will result in a narrow bandwidth of the antenna, while the distributed capacitance formed between the radiator unit 10 and the first feed unit 11 and the second feed unit 12 of the present application has a lower Q value, and therefore has a wider bandwidth.

[0043] In an embodiment, the first feed unit 11 and the second feed unit 12 are symmetrical with respect to a straight line passing through the center position of the radiator unit 10 as the axis of symmetry.

[0044] Referring to Figure 2 , Figure 2 is a schematic diagram of the architecture of the co-radiator dual antenna of the second embodiment of the present application. In an embodiment, the first feed unit 11 and the second feed unit 12 can be a loop antenna, a monopole antenna or a PIFA antenna, but are not limited thereto.

[0045] Referring to Figure 3 , Figure 3 is a schematic diagram of the frequency response of the co-radiator dual antenna of the third embodiment of the present application, in which the vertical axis is the gain in dB and the horizontal axis is the frequency value. As shown in the figure, the co-radiator dual antenna of the present application can correspond to multiple operating frequencies, in this embodiment, two operating frequencies (N77 to N79, 3.3 to 5 GHz), but is not limited thereto. Adjusting the length of the radiator unit 10, the first feed unit 11 or the second feed unit 12 will affect the frequency response.

[0046] Referring to Figure 4 , Figure 4 is a schematic diagram of the current at the first operating frequency of the fourth embodiment of the present application, in which the current is represented by a triangle, and the larger the triangle, the greater the current at that point. In an embodiment, the length of the coupling portion of the first feed unit 11 or the second feed unit 12 and the radiator unit 10 can be less than or equal to 1 / 4 wavelength (referring to the wavelength of the operating frequency). As shown in the figure, the current at the first operating frequency is mainly concentrated in the coupling portion of the first feed unit 11 and the radiator unit 10, and the current at the second operating frequency is mainly concentrated in the coupling portion of the second feed unit 12 and the radiator unit 10. Figure 4As shown, the length of the coupling part between the first feeding unit 11 and the radiator unit 10 is D1, which is designed to be less than or equal to 1 / 4 wavelength of the first operating frequency in this embodiment. When the co-radiator dual antenna operates at the first operating frequency, the current at the center of the radiator unit 10 will be greatly attenuated, so the sensing module 13 connected at this position will not affect the performance of transmitting or receiving radio frequency signals.

[0047] As shown in FIG. 1, the co-radiator dual antenna includes a first feeding unit 11, a second feeding unit 12, a radiator unit 10, a ground unit 14, a sensing module 13, a first radio frequency signal module 15, and a second radio frequency signal module 16. Figure 5 , Figure 5 As shown in FIG. 2, the length of the coupling part between the first feeding unit 11 and the radiator unit 10 is D1, which is designed to be less than or equal to 1 / 4 wavelength of the first operating frequency in this embodiment. When the co-radiator dual antenna operates at the first operating frequency, the current at the center of the radiator unit 10 will be greatly attenuated, so the sensing module 13 connected at this position will not affect the performance of transmitting or receiving radio frequency signals. Figure 5 As shown in FIG. 3, the length of the coupling part between the first feeding unit 11 and the radiator unit 10 is D1, which is designed to be less than or equal to 1 / 4 wavelength of the first operating frequency in this embodiment. When the co-radiator dual antenna operates at the first operating frequency, the current at the center of the radiator unit 10 will be greatly attenuated, so the sensing module 13 connected at this position will not affect the performance of transmitting or receiving radio frequency signals.

[0048] As shown in FIG. 4, the length of the coupling part between the first feeding unit 11 and the radiator unit 10 is D1, which is designed to be less than or equal to 1 / 4 wavelength of the first operating frequency in this embodiment. When the co-radiator dual antenna operates at the first operating frequency, the current at the center of the radiator unit 10 will be greatly attenuated, so the sensing module 13 connected at this position will not affect the performance of transmitting or receiving radio frequency signals.

[0049] As shown in FIG. 5, the length of the coupling part between the first feeding unit 11 and the radiator unit 10 is D1, which is designed to be less than or equal to 1 / 4 wavelength of the first operating frequency in this embodiment. When the co-radiator dual antenna operates at the first operating frequency, the current at the center of the radiator unit 10 will be greatly attenuated, so the sensing module 13 connected at this position will not affect the performance of transmitting or receiving radio frequency signals.

[0050] As shown in FIG. 6, the length of the coupling part between the first feeding unit 11 and the radiator unit 10 is D1, which is designed to be less than or equal to 1 / 4 wavelength of the first operating frequency in this embodiment. When the co-radiator dual antenna operates at the first operating frequency, the current at the center of the radiator unit 10 will be greatly attenuated, so the sensing module 13 connected at this position will not affect the performance of transmitting or receiving radio frequency signals.

[0051] In an embodiment, the radiator unit 10 is in a rectangular structure, but it is not limited thereto.

[0052] Referring to Figure 6 , Figure 6 Figure 6 is a schematic diagram of a co-radiator dual antenna according to a sixth embodiment of the present application. In one embodiment, the co-radiator dual antenna can further comprise at least one connecting capacitor C1 connected between the first feed unit 11 and the radiator unit 10, and at least one connecting capacitor C2 connected between the second feed unit 12 and the radiator unit 10. In other embodiments, the co-radiator dual antenna can have only one of the connecting capacitors C1 or C2, or more connecting capacitors.

[0053] With the connecting capacitors C1 and C2, the sensing module 13 can sense the distance to the external object through the radiator unit 10, the first feed unit 11 and the second feed unit 12, thus improving the sensing ability of the sensing module 13 when the external object approaches from the direction of the first feed unit 11 or the second feed unit 12, and further improving the sensing range of the sensing module 13.

[0054] In one embodiment, the co-radiator dual antenna can further comprise at least one connecting inductor L connected between the sensing module 13 and the radiator unit 10. For radio frequency signals of different transmission power, the connecting inductor L can be added between the sensing module 13 and the radiator unit 10 to isolate high frequency signals of high power.

[0055] Referring to Figure 7 , Figure 7 Figure 7 is a schematic diagram of the frequency response of a co-radiator dual antenna according to a seventh embodiment of the present application, in which the vertical axis is the gain in dB and the horizontal axis is the frequency value. As shown, adding inductors of different sizes (10 nH to 40 nH) in front of the sensing module 13 can have different attenuation effects (20 dB to 45 dB) for first radio frequency signals or second radio frequency signals of different transmission power.

[0056] In summary, the sensing module of the co-radiator dual antenna of the present application is connected to the substantially central position of the radiator unit. Since the radio frequency signals of the first radio frequency signal module and the second radio frequency signal module will be severely attenuated at the central position of the radiator unit, the sensing ability of the sensing module will not be affected. At the same time, the sensing module connected to this position will not affect the performance of the first radio frequency signal module and the second radio frequency signal module, so there is no need to add capacitors or inductors between the sensing module and other units to isolate high and low frequency signals, which can reduce the overall volume and cost, and improve the sensing distance of the sensing module.

[0057] The features and advantages of the present application will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. However, it should be understood that the application can be carried out in various ways, and that the presentation of a preferred embodiment does not limit the scope of the application to that embodiment. Therefore, any modification and variation of this preferred embodiment is possible without departing from the spirit and scope of the present application, and it should be understood that the scope of the present application should be defined by the appended claims.

Claims

1. A co-radiator dual antenna, characterized by, The co-radiator dual antenna comprises: a radiator unit; a first feed unit coupled to the radiator unit; a second feed unit coupled to the radiator unit; a sensing module for sensing a distance between the radiator unit and an external object through the radiator unit; and a ground unit connected to the sensing module, wherein the first feed unit is configured to transmit or receive a first radio frequency signal in cooperation with the radiator unit, the second feed unit is configured to transmit or receive a second radio frequency signal in cooperation with the radiator unit, the sensing module is connected to a substantially central position of the radiator unit, and the ground unit is not connected to the substantially central position by a capacitor.

2. The co-radiator dual antenna of claim 1, wherein, The first feed unit is symmetrical to the second feed unit.

3. The co-radiator dual antenna of claim 1, wherein, The first feed unit and the second feed unit are loop antennas, monopole antennas or PIFA antennas.

4. The co-radiator dual antenna of claim 1, wherein, A length of a coupling portion between the first feed unit or the second feed unit and the radiator unit is less than or equal to 1 / 4 wavelength.

5. The co-radiator dual antenna of claim 1, wherein, The co-radiator dual antenna further comprises: a first radio frequency signal module connected to the first feed unit for generating or receiving the first radio frequency signal; and a second radio frequency signal module connected to the second feed unit for generating or receiving the second radio frequency signal, wherein the first radio frequency signal module and the second radio frequency signal module are further connected to the ground unit.

6. The co-radiator dual antenna of claim 5, wherein, The sensing module is further configured to generate a distance signal according to the distance between the external object, and the first radio frequency signal module and the second radio frequency signal module are further configured to adjust output power of the first radio frequency signal or the second radio frequency signal, respectively, according to the distance signal.

7. The co-radiator dual antenna of claim 1, wherein, The radiator unit has a rectangular structure.

8. The co-radiator dual antenna of claim 1, wherein, A length of the radiator unit is less than or equal to 1 / 2 wavelength.

9. The co-radiator dual antenna of claim 1, wherein, The co-radiator dual antenna further comprises: at least one connection capacitor connected between the first feed unit and the radiator unit or between the second feed unit and the radiator unit.

10. The co-radiator dual antenna of claim 1, wherein, The co-radiator dual antenna further comprises: at least one connection inductor connected between the sensing module and the radiator unit.

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