This application claims the benefit of priority to Taiwan Patent Application No. 111122963, filed on Jun. 21, 2022. The entire content of the above identified application is incorporated herein by reference.
Some references, which may include patents, patent applications and various publications, may be cited and discussed in the description of this disclosure. The citation and/or discussion of such references is provided merely to clarify the description of the present disclosure and is not an admission that any such reference is “prior art” to the disclosure described herein. All references cited and discussed in this specification are incorporated herein by reference in their entireties and to the same extent as if each reference was individually incorporated by reference.
The present disclosure relates to an antenna structure and an electronic device, and more particularly to an antenna structure and an electronic device capable of increasing isolation by adjusting radiation patterns.
Electronic devices like smart phones, tablet computers and laptop computers are normally equipped with multiple antennas for wireless communication in different frequency bands. Because signals generated by adjacent antennas would interfere with each other, an isolator is then placed in between the two antennas to increase isolation. However, due to the light and thin design trend of electronic devices, there is no excess space in the electronic device to place the isolator.
So, how to improve isolation through a structural design that does not require the addition of extra isolator to the antenna structure has become an issue to be overcome.
In response to the above-referenced technical inadequacies, the present disclosure provides an antenna structure and an electronic device to effectively improve on the isolation issue between adjacent antennas associated with lack of space for isolator installation in conventional electronic devices.
In one aspect, the present disclosure provides an antenna structure, which includes a radiating element, a first feeding element, a second feeding element, a grounding element, and a grounding branch. The first feeding element has a first feeding portion and is connected with the radiating element through the first feeding portion. The second feeding element has a second feeding portion and is connected with the radiating element through the second feeding portion. The grounding element is connected with the radiating element and is located between the first feeding element and the second feeding element. The grounding branch has a first end and a second end. The first end is connected with the second feeding portion, and the second end is connected with a ground plane. The first feeding element is used for feeding a signal to excite the radiating element to generate a first radiation pattern. The second feeding element is used for feeding another signal to excite the radiating element to generate a second radiating pattern. The first radiation pattern is different from the second radiation pattern.
In another aspect, the present disclosure provides an electronic device, which includes a housing and an antenna structure disposed in the housing. The antenna structure includes a radiating element, a first feeding element, a second feeding element, a grounding element, and a grounding branch. The first feeding element has a first feeding portion and is connected with the radiating element through the first feeding portion. The second feeding element has a second feeding portion and is connected with the radiating element through the second feeding portion. The grounding element is connected with the radiating element and is located between the first feeding element and the second feeding element. The grounding branch has a first end and a second end. The first end is connected with the second feeding portion, and the second end is connected with a ground plane. The ground plane is electrically connected with the housing. The first feeding element is used for feeding a signal to excite the radiating element to generate a first radiation pattern. The second feeding element is used for feeding another signal to excite the radiating element to generate a second radiation pattern. The first radiation pattern is different from the second radiation pattern.
Therefore, through the design of the grounding element being located between the first feeding element and the second feeding element and the grounding branch being connected with the second feeding portion in the antenna structure and the electronic device provided by the present disclosure, the first radiation pattern generated by the first feeding element differs from the second radiation pattern generated by the second feeding element, and thus the isolation between the first antenna and the second antenna is enhanced.
These and other aspects of the present disclosure will become apparent from the following description of the embodiment taken in conjunction with the following drawings and their captions, although variations and modifications therein may be affected without departing from the spirit and scope of the novel concepts of the disclosure.
The described embodiments may be better understood by reference to the following description and the accompanying drawings, in which:
The present disclosure is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Like numbers in the drawings indicate like components throughout the views. As used in the description herein and throughout the claims that follow, unless the context clearly dictates otherwise, the meaning of “a”, “an”, and “the” includes plural reference, and the meaning of “in” includes “in” and “on”. Titles or subtitles can be used herein for the convenience of a reader, which shall have no influence on the scope of the present disclosure.
The terms used herein generally have their ordinary meanings in the art. In the case of conflict, the present document, including any definitions given herein, will prevail. The same thing can be expressed in more than one way. Alternative language and synonyms can be used for any term(s) discussed herein, and no special significance is to be placed upon whether a term is elaborated or discussed herein. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms is illustrative only, and in no way limits the scope and meaning of the present disclosure or of any exemplified term. Likewise, the present disclosure is not limited to various embodiments given herein. Numbering terms such as “first”, “second” or “third” can be used to describe various components, signals or the like, which are for distinguishing one component/signal from another one only, and are not intended to, nor should be construed to impose any substantive limitations on the components, signals or the like.
In addition, the term “or”, as used herein, should include any one or a combination of the associated enlisted items, as the case may be. The term “connect” in the context of the present disclosure means there is a physical connection between two elements and is directly or indirectly connected. The term “couple” in the context of the present disclosure means there is no physical connection between two separated elements, and the two elements are instead connected by their electric field energy where the electric field energy generated by the current of one element excites the electric field energy of the other element.
Referring to
Referring to
The grounding element 3 is connected with the radiating element T and is located between the first feeding element S1 and the second feeding element S2. The grounding branch 4 has a first end 41 and a second end 42. The first end 41 is connected with the second feeding portion 2, and the second end 42 is connected with a ground plane G. Specifically, the second end 42 is directly connected with the ground plane G. The ground plane G is, for example, a surface of the housing H or a metal piece electrically connected with the housing H, and the present disclosure is not limited thereby. It is to be noted that the antenna structure M shown in
For example, the first antenna that includes the first feeding element S1 and the radiating element T may be a long term evolution (LTE) antenna, a wireless wide area network (WWAN) antenna, a multi-in multi-out (MIMO) antenna, and the present disclosure does not limit the type of the first antenna. Moreover, in the present disclosure, the second antenna that includes the second feeding element S2 and the radiating element T is a wireless local area network (WLAN) antenna. The second feeding element S2 is used to excite the radiating element T to generate a first operating frequency band and a second operating frequency band. The first operating frequency band is the low frequency band generated by the WLAN antenna and has a frequency range of 2.4 GHz to 2.5 GHz. The second operating frequency band is the high frequency band generated by the WLAN antenna and has a frequency range between 5.15 GHz and 5.85 GHz. The first operating frequency band is lower than the second operating frequency band.
When the first antenna is a multiband antenna like an LTE antenna, the antenna structure M further includes a parasitic coupling element 5. The parasitic coupling element 5 is disposed close to or near the first feeding element S1. The first feeding element S1 is closer to the parasitic coupling element 5 than the second feeding element S2 is to the parasitic coupling element 5. The first feeding element S1, the radiating element T, and the parasitic coupling element 5 together form the first antenna. The first antenna is configured to generate a frequency range that is adjustable by coupling the parasitic coupling element 5 with the radiating element T.
Referring to
Specifically, as shown in
Referring to
Hence, in this embodiment, the path length of the first antenna path is the sum of the first length L1, the second length L2, the third length L3, and the length of the grounding element 3. The path length of the second antenna path is the sum of the first length L1, the length of the grounding branch 4, and the fourth length L4.
Furthermore, another difference between the antenna structure M of
Referring to
The inductive element 6 and the radiating element T meet at a fifth connecting point P5, and there is a fifth length L5 between the second connecting point P2 and the fifth connecting point P5 as the second connecting point P2 is separate from the fifth connecting point P5 by the fifth length L5. Thus, in this embodiment, the path length of the first antenna path is the sum of the first length L1, the second length L2, the fifth length L5, the length of the inductive element 6, and the length of the grounding element 3. The path length of the second antenna path is the sum of the first length L1, the length of the grounding branch 4, and the length of the grounding element 3. Through the placement of the inductive element 6, the antenna structure M of the present disclosure effectively shortens the path length of the first antenna path, thereby minimizing the overall length of the radiating element T, and as such the antenna structure M can be adjusted to fit the location and the space.
In conclusion, through the design of the grounding element 3 being located between the first feeding element S1 and the second feeding element S2 and the grounding branch 4 connecting with the second feeding portion 2, the first radiation pattern generated by the first feeding element S1 differs from the second radiation pattern generated by the second feeding element S2, and so the antenna structure M and the electronic device provided by the present disclosure can enhance the isolation between the first antenna and the second antenna.
More specifically, by placing the grounding element 3 between the first feeding element S1 and the second feeding element S2, the isolation of the antenna structure M of the present disclosure in the low frequency band (2.4 GHz to 2.5 GHz) is improved. Moreover, the isolation of the antenna structure M of the present disclosure in the high frequency band (5.15 GHz to 5.85 GHz) is improved by connecting the grounding branch 4 with the second feeding portion 2.
Take the first antenna being a WWAN antenna and the second antenna being a WLAN antenna as an example. Referring to
Then, referring to
It is to be noted that
The foregoing description of the exemplary embodiments of the disclosure has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.
The embodiments were chosen and described in order to explain the principles of the disclosure and their practical application so as to enable others skilled in the art to utilize the disclosure and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present disclosure pertains without departing from its spirit and scope.
Number | Date | Country | Kind |
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111122963 | Jun 2022 | TW | national |