Antenna device

Abstract

The present invention discloses an antenna device. The antenna device includes a feeding end, a first radiation portion, a second radiation portion, a third radiation portion, a fourth radiation portion, and a grounding end. The second end of the first radiation portion is connected to the feeding end. The first end of the second radiation portion is connected to the first end of the first radiation portion. The first end of the third radiation portion is connected to the first end of the fourth radiation portion. A gap is included between the second end of the fourth radiation portion and the first end of the second radiation portion. The second end of the third radiation portion is connected to the grounding end.

Description

Technical Field

[0001] The present invention relates to an antenna device, and particularly to an antenna device with a simple structure. Background Art

[0002] With the development of communication systems, more and more antennas are required in mobile communication devices, and it will be increasingly difficult to design antenna devices in a limited space.

[0003] How to provide an antenna device with a simple structure and meeting the requirements of multiple frequency bands has become one of the important issues to be solved in this field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an antenna device in view of the deficiencies of the prior art, which is characterized by including: a feeding end; a first radiation part including a first end and a second end, wherein the second end of the first radiation part is connected to the feeding end; a second radiation part including a first end and a second end, wherein the first end of the second radiation part is connected to the first end of the first radiation part; a third radiation part including a first end and a second end; a fourth radiation part including a first end and a second end, wherein a gap is included between the first end of the third radiation part and the first end of the fourth radiation part, and between the second end of the fourth radiation part and the first end of the second radiation part; and a grounding end, wherein the second end of the third radiation part is connected to the grounding end.

[0005] Preferably, the first end of the second radiation part and the second end of the fourth radiation part are arranged on the same plane.

[0006] Preferably, the first radiation part and the second radiation part generate a first radiation frequency, and the third radiation part and the fourth radiation part generate a second radiation frequency, and the first radiation frequency and the second radiation frequency are between 3.2 GHz and 5.2 GHz.

[0007] Preferably, the first radiation frequency is between 3.2 GHz and 3.7 GHz, and the second radiation frequency is between 4.5 GHz and 5.2 GHz.

[0008] Preferably, the first radiation part, the second radiation part, the third radiation part and the fourth radiation part are arranged on the same plane or the same curved surface.

[0009] Preferably, the second radiation part and the fourth radiation part are arranged on a first plane.

[0010] Preferably, the first radiation part and the third radiation part are disposed on a second plane, and the first plane and the second plane are two adjacent planes with an included angle therebetween.

[0011] Preferably, the gap is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

[0012] Preferably, the total distance between the first radiation part and the second radiation part is between 18 mm and 21 mm, and the total distance between the third radiation part and the fourth radiation part is between 8 mm and 10 mm.

[0013] Preferably, the gap is disposed at a first position. When the gap moves from the first position towards the first radiation part, the second radiation frequency decreases, and when the gap moves from the first position towards the third radiation part, the second radiation frequency increases.

[0014] One beneficial effect of the present invention is that the antenna device provided by the present invention can provide two modal frequency bands with a relatively small installation space. It not only has a simple structure, is easy to design, and has a relatively wide bandwidth, but also has the advantages of low cost and easy manufacturing. Moreover, the structure of the antenna device provided by the present invention can be extended to different types of antenna design methods, making the application more flexible.

[0015] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided drawings are only for reference and illustration, and are not used to limit the present invention. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the antenna device according to the first embodiment of the present invention.

[0017] Figure 2A is the antenna characteristic curve diagram of the antenna device according to the first embodiment of the present invention.

[0018] Figure 2B is Figure 2A the current distribution diagram of the antenna device.

[0019] Figure 3A is another antenna characteristic curve diagram of the antenna device according to the first embodiment of the present invention.

[0020] Figure 3B is Figure 3A the corresponding another current distribution diagram of the antenna device.

[0021] Figure 4A is the adjustment schematic diagram of the antenna characteristic curve of the antenna device according to the first embodiment of the present invention.

[0022] Figure 4B is the schematic diagram of the antenna device gap adjustment corresponding to Figure 4A the adjustment of the antenna characteristic curve.

[0023] Figure 5A is the schematic diagram after the adjustment of the antenna characteristic curve of the antenna device according to the first embodiment of the present invention.

[0024] Figure 5B is the corresponding Figure 5A schematic diagram of the antenna device gap after the adjustment of the antenna characteristic curve.

[0025] Figure 6A is another schematic diagram of the antenna device according to the second embodiment of the present invention.

[0026] Figure 6B is another schematic diagram of the antenna device according to the third embodiment of the present invention. Detailed implementation manners

[0027] The following are specific embodiments to illustrate the implementation manners of the "antenna device" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not drawn according to actual sizes, which is stated in advance. The following implementation manners will further detail the related technical content of the present invention, but the disclosed content is not used to limit the protection scope of the present invention. In addition, the term "or" used herein should include any one or a combination of more of the related listed items depending on the actual situation.

[0028] [First Embodiment]

[0029] Please refer to Figure 1 , Figure 2A , Figure 2B , Figure 3A and Figure 3B , Figure 1 is the schematic diagram of the antenna device according to the first embodiment of the present invention. Figure 2A is the antenna characteristic curve graph of the antenna device according to the first embodiment of the present invention. Figure 2B is Figure 2A a current distribution diagram of the antenna device. Figure 3A is another antenna characteristic curve graph of the antenna device according to the first embodiment of the present invention. Figure 3B is Figure 3A the corresponding another current distribution diagram of the antenna device.

[0030] Please refer to Figure 1, in this embodiment, an antenna device SYS is provided. The antenna device SYS includes a feed end FEED, a first radiation part L1, a second radiation part L2, a third radiation part L3, a fourth radiation part L4, and a ground end GND.

[0031] In the following description, for a horizontally arranged path, the left side is the first end and the right side is the second end; for a vertically arranged path, the upper side is the first end and the lower side is the second end.

[0032] The first radiation part L1 includes a first end and a second end. The second end of the first radiation part L1 is connected to the feed end FEED.

[0033] The second radiation part includes a first end and a second end. The first end of the second radiation part L2 is connected to the first end of the first radiation part L1, so that the first radiation part L1 and the second radiation part L2 form a T-shaped radiation part or an L-shaped radiation part.

[0034] The third radiation part L3 includes a first end and a second end.

[0035] The fourth radiation part L4 includes a first end and a second end. The first end of the third radiation part L3 is connected to the first end of the fourth radiation part L4. There is a gap GAP between the second end of the fourth radiation part L4 and the first end of the second radiation part L2. In addition, the third radiation part L3 and the fourth radiation part L4 also form an L-shaped radiation part. That is, when the gap GAP is set between the second radiation part L2 and the fourth radiation part L4, the position of the gap GAP can be, for example, between the third radiation part L3 and the first radiation part L1.

[0036] The second end of the third radiation part L3 is connected to the ground end GND.

[0037] The antenna signal of the feed end FEED passes through the first radiation part L1, the second radiation part L2, the third radiation part L3, and the fourth radiation part L4, and then two frequency bands of frequencies can be received and transmitted. That is, the antenna device SYS in this embodiment is a dual-band mode antenna.

[0038] In this embodiment, the first radiation part L1, the second radiation part L2, the third radiation part L3, and the fourth radiation part L4 are arranged on a first plane S1. The ground end GND and the feed end are arranged on a second plane S2. The first plane S1 and the second plane S2 are the same plane. In other embodiments, the first plane S1 and the second plane S2 are the same curved surface. Among them, the first plane S1 and the second plane S2 can be the same plane or different planes of the same carrier, such as a circuit board or a housing. The first plane S1 and the second plane S2 can also be different planes of different carriers, such as the first plane S1 is a plane of the housing and the second plane S2 is a plane of the circuit board.

[0039] Please refer to Figure 2A and Figure 2B , in this embodiment, the current (antenna signal) flowing through Figure 2B the first radiation portion L1 and the second radiation portion L2 therein will generate a first radiation frequency. That is, corresponding to Figure 2A the frequency region R1 in

[0040] Please refer to Figure 3A and Figure 3B , the current (antenna signal) flowing through Figure 3A the third radiation portion and the fourth radiation portion therein will generate a second radiation frequency, which corresponds to Figure 3B the frequency region R2 in. The first radiation frequency and the second radiation frequency are, for example, between 3.2 GHz and 5.2 GHz. Among them, the arrow is the current direction. Figure 2A The curve C1 of Figure 3A and

[0041] is the frequency response curve of a single - frequency antenna, and the curve C2 is the frequency response curve of the dual - frequency antenna of the antenna device SYS in this embodiment.

[0042] The antenna device SYS of this embodiment is based on a PIFA antenna, and the gap GAP is set between the second radiation portion L2 and the fourth radiation portion L4.

[0043] After adding the gap GAP, the originally single - frequency PIFA antenna generates two resonance modes. One antenna radiation mode is jointly generated by the first radiation portion L1 and the second radiation portion L2, and the resonance frequency is about 3.48 GHz. The current path length is about one - quarter of the wavelength. Therefore, the total distance of the first radiation portion L1 and the second radiation portion L2 is about 20 mm. That is, the sum of the first radiation portion L1 and the second radiation portion L2 is, for example, between 18 and 21 mm.

[0044] The resonance frequency of the other antenna radiation mode is 4.95 GHz. It is jointly generated by the paths of the third radiation portion L3 and the fourth radiation portion L4. The current path length is about one - quarter of the wavelength. Therefore, the total distance of the third radiation portion L3 and the fourth radiation portion L4 is about 9.5 mm.

[0045] In this embodiment, the first radiation frequency is, for example, between 3.2 GHz and 3.7 GHz. The second radiation frequency is, for example, between 4.5 GHz and 5.2 GHz.

[0046] In this embodiment, the width of the gap GAP is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

[0047] The sum distance of the first radiation portion and the second radiation portion is, for example, between 18 mm and 21 mm. The sum distance of the third radiation portion and the fourth radiation portion is, for example, between 8 mm and 10 mm.

[0048] In addition, the first radiation portion L1, the second radiation portion L2, the third radiation portion L3, and the fourth radiation portion L4 are also disposed on the same plane (the first plane S1).

[0049] Please refer to Figure 4A 、 Figure 4B 、 Figure 5A and Figure 5B , Figure 4A is a schematic diagram of the adjustment of the antenna characteristic curve of the antenna device according to the first embodiment of the present invention. Figure 4B is corresponding to Figure 4A is a schematic diagram of the gap adjustment of the antenna device for the adjustment of the antenna characteristic curve. Figure 5A is a schematic diagram after the adjustment of the antenna characteristic curve of the antenna device according to the first embodiment of the present invention. Figure 5B is corresponding to Figure 5A is a schematic diagram of the gap adjustment of the antenna device after the adjustment of the antenna characteristic curve.

[0050] Figure 4A and Figure 4B are the antenna characteristic diagram and the antenna device gap position before adjustment. Figure 5A and Figure 5B are the antenna characteristic diagram and the antenna device gap position after adjustment. Figure 4A and Figure 5A The curve C1 of and Figure 5A is the frequency response curve of the single-frequency antenna, and the curve C2 is the frequency response curve of the dual-frequency antenna of the antenna device SYS in this embodiment.

[0051] The gap GAP is set at a first position P1. When the gap GAP moves from the first position towards the first radiation portion L1 and the second radiation portion L2, the fourth radiation portion L4 increases, that is, the second radiation frequency decreases. On the contrary, when the gap GAP moves from the first position P1 towards the third radiation portion L3 and the fourth radiation portion L4 to the second position P2, the second radiation frequency will increase.

[0052] Figure 4A and Figure 4B are to adjust the position of the gap GAP so that the gap GAP approaches the first radiation portion L1 by 2 mm, and its second radiation frequency will shift towards the low frequency by a frequency amount from 4.95 GHz to 4.77 GHz. In the actual adjustment process, the frequency shift amount is 150 MHz to 180 MHz. Among them,Figure 4B The fourth radiating portion L4 will be shorter than Figure 5B the fourth radiating portion L4' of

[0053] Relatively, when the gap GAP approaches the third radiating portion L3, the first radiation frequency will shift to a higher frequency by a certain frequency amount.

[0054] That is, in this embodiment, the benefit of frequency control can be achieved by adjusting the first position P1 of the gap GAP.

[0055] In addition, in this embodiment, the antenna device SYS can be disposed on substrates such as circuit boards, flexible boards, plastics, carbon fibers, etc., without limitation in the present invention.

[0056] For example, when the antenna device SYS is disposed on a substrate made of FR4, the substrate thickness is 1.6 mm. A gap GAP is placed between the feeding end and the grounding end, and the width of the gap GAP is 0.4 mm. The simulation results show that after adding the gap GAP, the original single-frequency antenna device will generate two resonance modes. One resonance mode is generated by the first radiating portion L1 and the second radiating portion L2, and the resonance frequency is 3.48 GHz, and the current path length is about one-quarter wavelength. The resonance frequency of the other mode is 4.95 GHz, which is generated by the third radiating portion L3 and the fourth radiating portion L4, and the current path length is also about one-quarter wavelength.

[0057] [Second Embodiment]

[0058] Please refer to Figure 6A , the second radiating portion L2 and the fourth radiating portion L4 are disposed on a first plane S1. The first radiating portion L2 and the third radiating portion L3 are disposed on a second plane S2. The first plane S1 and the second plane S2 are two adjacent planes with an included angle θ. The included angle θ is less than 360 degrees and greater than 0 degrees.

[0059] [Third Embodiment]

[0060] Please refer to Figure 6B , the second radiating portion L2 and the fourth radiating portion L4 are disposed on a first plane S1'. The first radiating portion L2 and the third radiating portion L3 are disposed on a second plane S2. The first plane S1' and the second plane S2 are two adjacent planes. In addition, the first plane S1' is a curved surface or an arc surface.

[0061] [Advantages of the Embodiment]

[0062] One of the beneficial effects of the present invention is that the antenna device provided by the present invention can utilize a relatively small installation space to provide frequency bands of two modal frequency bands. It not only has a simple structure, is easy to design, and has a relatively wide bandwidth, but also has the advantages of low cost and easy manufacturing in the structure of the antenna device provided by the present invention. Moreover, it can be extended to different types of antenna design methods, making the application method more flexible.

[0063] The content disclosed above is only the preferred feasible embodiment of the present invention, and does not limit the claims of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the claims of the present invention.

Claims

1. An antenna device, characterized in that, Comprising: A feeding end; A first radiation part, including a first end and a second end, the second end of the first radiation part being connected to the feeding end; A second radiation part, including a first end and a second end, the first end of the second radiation part being connected to the first end of the first radiation part, wherein the first radiation part and the second radiation part jointly generate an antenna signal with a first radiation frequency; A third radiation part, including a first end and a second end; A fourth radiation part, including a first end and a second end, the first end of the third radiation part being connected to the first end of the fourth radiation part, and there being a gap between the second end of the fourth radiation part and the first end of the second radiation part, wherein the third radiation part and the fourth radiation part jointly generate an antenna signal with a second radiation frequency; And A grounding end, the second end of the third radiation part being connected to the grounding end; Wherein, the total distance of the first radiation part and the second radiation part is between 18 mm and 21 mm, and the total distance of the third radiation part and the fourth radiation part is between 8 mm and 10 mm.

2. The antenna device according to claim 1, wherein The first end of the second radiation part and the second end of the fourth radiation part are arranged on the same plane.

3. The antenna device according to claim 2, wherein, The first radiation frequency and the second radiation frequency are between 3.2 GHz and 5.2 GHz.

4. The antenna device according to claim 3, wherein The first radiation frequency is between 3.2 GHz and 3.7 GHz, and the second radiation frequency is between 4.5 GHz and 5.2 GHz.

5. The antenna device according to claim 4, characterized in that, The first radiation part, the second radiation part, the third radiation part and the fourth radiation part are arranged on the same plane or the same curved surface.

6. The antenna device according to claim 1, wherein The second radiation part and the fourth radiation part are arranged on a first plane.

7. The antenna device according to claim 6, wherein: The first radiation part and the third radiation part are arranged on a second plane, and the first plane and the second plane are two adjacent planes with an included angle.

8. The antenna device according to claim 1, wherein, The gap is greater than or equal to 0.2 mm and less than or equal to 0.4 mm.

9. The antenna device according to claim 5, wherein, The gap is arranged at a first position. When the gap moves towards the first radiation part from the first position, the second radiation frequency will decrease. When the gap moves towards the third radiation part from the first position, the second radiation frequency will increase.

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