Co-radiator monopole

Abstract

A co-radiator single antenna includes a radiator unit, a feed unit, a sensing module and a grounding unit. The feed unit is coupled with the radiator unit and used to jointly transmit or receive radio frequency signals with the radiator unit. The sensing module is connected with the radiator unit and used to sense a spacing distance between the radiator unit and an external object through the radiator unit. The grounding unit forms a distributed capacitance structure between the radiator unit.

Description

TECHNICAL FIELD

[0001] The present application relates to a monopole antenna with a common radiator, and more particularly to a monopole antenna with a common radiator applied to a specific adsorption rate (SAR) test. BACKGROUND

[0002] Generally, in order to avoid the electromagnetic waves generated by a communication electronic product such as a mobile phone or a tablet computer from affecting human health, the electronic product needs to pass a SAR test. In the prior art, a sensing module is electrically connected to the antenna of the electronic product to detect the separation distance between the antenna and the human body, and the output power of the radio frequency signal is adjusted according to the separation 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 in the capacitance value of the antenna radiator to determine the separation distance, which is a low frequency signal, a capacitor needs to be added between the antenna radiator and the ground plane to isolate the high and low frequency signals and prevent 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 can be detected by the sensing module. Therefore, the added capacitor affects the detection capability of the sensing module, reducing the maximum separation distance that can be detected. Therefore, how to provide a monopole antenna with a common radiator that can isolate high and low frequency signals without affecting the separation 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, the present application aims to provide a monopole antenna with a common radiator that can isolate high and low frequency signals without affecting the separation distance detection capability.

[0005] To achieve the above-mentioned purpose, the present application provides a monopole antenna with a common radiator, which comprises a radiator unit, a feed-in unit, a sensing module, and a ground unit.

[0006] The feed-in unit is coupled to the radiator unit and is used to transmit or receive radio frequency signals together with the radiator unit; the sensing module is connected to the radiator unit and is used to sense the separation distance between the radiator unit and an external object through the radiator unit; and the ground unit forms a distributed capacitor structure between the radiator unit.

[0007] In an embodiment of the present application, the monopole antenna with a common radiator further comprises a radio frequency signal module connected to the feed-in unit to generate or receive radio frequency signals.

[0008] In one embodiment of the present invention, the sensing module is further configured to generate a distance signal based on the distance between itself and an external object, and the radio frequency signal module is further configured to adjust the output power of the radio frequency signal based on the distance signal.

[0009] In one embodiment of the present invention, the feed unit is a loop antenna, a monopole antenna, or a PIFA (Planar Inverted-F Antenna) antenna.

[0010] In one embodiment of the present invention, the distributed capacitor structure is a single-layer capacitor structure, a double-layer capacitor structure, or a finger-type capacitor structure.

[0011] In one embodiment of the present invention, the common radiator single antenna further includes a connecting capacitor, one end of which is connected to the radiator element and the other end of which is connected to the feed element element.

[0012] Compared to existing technologies, the co-radiator single antenna of the present invention forms a distributed capacitor structure between the grounding unit and the radiator unit, which can isolate high and low frequency signals. Since the conductor length or area of ​​the distributed capacitor structure at the radiator unit end is much smaller than that at the grounding unit end, it is difficult to store charge, so the capacitance value is very small and will not affect the interval distance sensing capability of the sensing module, thus fully solving the problems of existing technologies. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the architecture of a common-radiator single antenna according to the first embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the architecture of a co-radiator single antenna according to the second embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the architecture of a common-radiator single antenna according to the third embodiment of the present invention.

[0016] Symbol explanation:

[0017] 10 radiator units

[0018] 100 Distributed Capacitor Structure

[0019] 11 Feed unit

[0020] 12 Sensing Modules

[0021] 13 Grounding Unit

[0022] 14 Radio Frequency Signal Module

[0023] 15 Connect capacitors Detailed Implementation

[0024] The present application is herein described, by way of example only, with the assistance of the accompanying drawings detailed description given herein. Other advantages of the present application will be readily observed by those with ordinary skill in the art from a review of the disclosure, wherein other embodiments of the present application can be used and other advantages of the application achieved.

[0025] It is to be understood that the structure, proportions, elements, materials and / or arrangements of the various examples described herein are not limiting and that other examples can be used without departing from the spirit and scope of the present application. Further, it is to be understood that features of the various examples described herein can be combined, altered, modified, enhanced, improved and / or interchanged, according to design, application and / or function without departing from the spirit and scope of the present application. It is therefore intended that the disclosure be considered as exemplary only and that the scope of the application be determined from the appended claims.

[0026] Referring to FIG. 1, which is a schematic diagram of a co-radiator single antenna according to a first embodiment of the present application. As shown in FIG. 1, the co-radiator single antenna of the present application includes a radiator unit 10, a feed unit 11, a sensing module 12, and a ground unit 13. Figure 1

[0027] In one embodiment, the feed unit 11 is coupled to the radiator unit 10 and is used to transmit or receive radio frequency signals with the radiator unit 10. For example, the radio frequency signals can be electromagnetic wave signals of 2.4 GHz or 5 GHz based on IEEE 802.11 standards, but not limited thereto. In addition, the size or shape of the feed unit 11 and the radiator unit 10 can be adjusted to receive radio frequency signals of different frequency bands.

[0028] In one embodiment, the sensing module 12 is connected to the radiator unit 10 and is used to sense the separation distance between the radiator unit 10 and an external object (e.g., a human body) through the radiator unit 10. When the external object approaches, the sensing module 12 can sense the 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. In addition, for radio frequency signals of different transmission powers, an inductor can be added between the sensing module 12 and the radiator unit 10 to isolate high-power high-frequency signals.

[0029] In one embodiment, a distributed capacitance structure 100 is formed between the ground unit 13 and the radiator unit 10, as shown in FIG. 2. The distributed capacitance structure 100 includes a plurality of capacitors 101, 102, 103, 104, 105, 106, 107, 108, 109, and 110. Figure 1 ​The portion framed by the dotted line is the co-radiator single antenna of the present application. Instead of using the ceramic capacitor in the prior art, the co-radiator single antenna of the present application uses the distributed capacitance structure 100 to isolate the high and low frequency signals. Since the conductor length or area at the end of the radiating element 10 is much smaller than that at the end of the grounding element 13, it is difficult to store electric charges, and thus the capacitance value is very small, which does not affect the sensing distance sensing capability of the sensing module 12. For example, compared with the ceramic capacitor with a capacitance value of about tens of pF in the prior art, the co-radiator single antenna of the present application can improve the sensing distance by 20% to 60%, and at the same time, it does not need to additionally add a capacitor or an inductor, which can reduce the overall volume and cost. In addition, adjusting the gap distance between the radiating element 10 and the grounding element 13 can adjust the capacitance value of the distributed capacitance structure 100. For example, the capacitance value of the distributed capacitance structure 100 can be finely adjusted to offset the influence of other parasitic capacitances.

[0030] Furthermore, the lumped capacitor component used in the prior art has a high Q value (Quality factor), which will result in a narrow bandwidth of the antenna, while the Q value of the distributed capacitance structure 100 of the present application is low, and thus has a wide bandwidth.

[0031] Please refer to Figure 2 , Figure 2 The figure is a schematic diagram of the architecture of the co-radiator single antenna of the second embodiment of the present application. In an embodiment, the co-radiator single antenna of the present application can also include a radio frequency signal module 14 connected with the feed-in element 11, which is used to generate or receive a radio frequency signal.

[0032] In an embodiment, the sensing module 12 can also be used to generate a distance signal according to the distance from the external object, and the radio frequency signal module 14 is also used to adjust the output power of the radio frequency signal according to the distance signal. For example, when the external object (such as a human body) approaches, the radio frequency signal module 14 reduces the output power of the radio frequency signal to meet the specifications of the SAR test.

[0033] In an embodiment, the feed-in element 11 can be a loop antenna, a monopole antenna or a PIFA antenna, but is not limited thereto.

[0034] In an embodiment, the distributed capacitance structure 100 can be a single-layer capacitance structure, a double-layer capacitance structure (such as arranging conductors on the upper and lower layers of a substrate) or a fork capacitance structure, but is not limited thereto.

[0035] Please refer to Figure 3 , Figure 3Fig. 3 is a schematic diagram of a co-radiator single antenna according to a third embodiment of the present application. In one embodiment, the co-radiator single antenna of the present application can further include a connecting capacitor 15, one end of which is connected to the radiator unit 10 and the other end of which is connected to the feed unit 11. After the connecting capacitor 15 is added, the sensing module 12 can sense the distance to the external object through the radiator unit 10 and the feed unit 11, and thus the sensing capability of the sensing module 12 when the external object approaches from the direction of the feed unit 11 can be improved, and the sensing range of the sensing module 12 can be further improved.

[0036] Compared with the prior art, the co-radiator single antenna of the present application forms a distributed capacitor structure between the ground unit and the radiator unit, which can isolate high and low frequency signals, and because the conductor length or area at the end of the radiator unit is much smaller than that at the end of the ground unit, it is difficult to store electric charges, and thus the capacitance value is very small, which does not affect the sensing capability of the sensing module for the distance, and fully solves the problems of the prior art. In addition, the co-radiator single antenna of the present application does not need additional components such as capacitors, and thus the overall volume and cost can be reduced.

[0037] The features and spirits of the present application can be more clearly understood through the above description of the preferred embodiments, which are only used to illustrate the principles and effects of the present application, but not to limit the present application. Therefore, any modification and change to the above embodiments without departing from the spirit of the present application is still within the scope of the present application, and the scope of the present application should be subject to the claims.

Claims

1. A co-radiator single antenna, characterized by, The common radiator single antenna comprises: a radiator unit; a feed-in unit coupled with the radiator unit and used for jointly transmitting or receiving radio frequency signals with the radiator unit; a sensing module connected with the radiator unit and used for sensing a distance between the radiator unit and an external object through the radiator unit; and a ground unit forming a distributed capacitance structure with the radiator unit, the distributed capacitance structure having a conductor length or area at the end of the radiator unit much smaller than that at the end of the ground unit.

2. The co-radiator single antenna of claim 1, wherein, The common radiator single antenna further comprises: a radio frequency signal module connected with the feed-in unit and used for generating or receiving the radio frequency signals.

3. The corporate-body single antenna of claim 2, wherein, The sensing module is further used for generating a distance signal according to the distance between the external object, and the radio frequency signal module is further used for adjusting the output power of the radio frequency signals according to the distance signal.

4. The corporate-fed monopole antenna of Claim 1, wherein: The feed-in unit is a loop antenna, a monopole antenna or a PIFA antenna.

5. The co-radiator single antenna of claim 1, wherein, The distributed capacitance structure is a single-layer capacitance structure, a double-layer capacitance structure or a fork capacitance structure.

6. The co-radiator single antenna of claim 1, wherein, The common radiator single antenna further comprises: a connecting capacitance having one end connected with the radiator unit and the other end connected with the feed-in unit.

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