TWI829203B - Overlapping multi-element coupled antenna - Google Patents

Abstract

An overlapping multi-elements coupled antenna includes a feeding part, a first coupling part, a second coupling part, and an extension part. The feeding part is electrically coupled to a transmission line. The first coupling part is adjacent to the feeding part for adjacently coupling to the feeding part. The second coupling part is adjacent to the feeding part for coupling to the feeding part. The extension part is coupled to the second coupling part. A portion of the extension part covers the feeding part and the first coupling part. When the portion of the extension part covers the feeding part and the first coupling part, the second coupling part overlaps the feeding part and the first coupling part. The feeding part is disposed between the first coupling part and the second coupling part.

Description

Overlapping multi-element coupled antenna

The present invention describes an overlapping multi-element coupling antenna, particularly an overlapping multi-element coupling antenna that optimizes radio frequency return loss parameters and reduces the design difficulty of multi-band antennas.

As the market's demand for communications continues to increase, fifth-generation (5G) mobile communications are booming. Automobiles, the Internet and medical equipment have increasingly extensive demands for the integration of mobile communications, wireless navigation, wireless fidelity, etc. Therefore, the requirements of the above multiple communication standards are undoubtedly a challenge for antenna design. In order to improve the communication capacity, data transmission speed and anti-noise capability of the communication system, good antenna design and lightweight antenna design are inevitable trends.

Generally, the radiation efficiency of antennas at specific frequencies will be attenuated when there is insufficient environmental space. Moreover, many antennas have complex structures, and if their electrical properties are unstable when fixed to an object, they can easily deform under severe shaking or impact. In addition, since large broadband antennas require a wide frequency band and the specifications for specific frequency bands are strict, it is not easy to meet the efficiency specifications for specific frequency bands through past adjacent coupling or the frequency band extracted using the antenna body.

Therefore, it is an important design issue to develop an antenna that optimizes radiation efficiency, has a simple structure, stable electrical characteristics, and can optimize radiation efficiency in a specific frequency band.

One embodiment of the present invention provides an overlapping multi-element coupling antenna. The overlapping multi-element coupling antenna includes a feed part, a first coupling part, a second coupling part and an extension part. The feed-in part is electrically coupled to the transmission line. The first coupling part is adjacent to the feed part and is used for coupling adjacent to the feed part. The second coupling part is adjacent to the feeding part and is used for coupling with the feeding part. The extension part is coupled to the second coupling part. A part of the extension part covers the feed part and the first coupling part. When a part of the extension part covers the feed part and the first coupling part, the second coupling part overlaps and couples the feed part and the first coupling part. The feed-in part is located between the first coupling part and the second coupling part.

100: Overlapping multi-element coupled antenna

10: Feeding Department

11: First coupling part

12:Second coupling part

13:Extension part

20: Fixed part

L: transmission line

Figure 1 is a block diagram of an embodiment of the overlapping multi-element coupling antenna of the present invention viewed from a first plan view.

Figure 2 is a block diagram of the overlapping multi-element coupling antenna of Figure 1 in a second plan view.

Figure 3 is a schematic diagram of the relationship between components in the first step of the overlapping multi-element coupling antenna in Figure 1.

Figure 4 is a schematic diagram of the relationship between components in the second step of the overlapping multi-element coupling antenna in Figure 1.

Figure 5 is a schematic diagram of the relationship between components in the third step of the overlapping multi-element coupling antenna in Figure 1.

Figure 1 is a block diagram of an embodiment of the overlapping multi-element coupling antenna 100 of the present invention viewed from a first plan view. Figure 2 is a block diagram of an embodiment of the overlapping multi-element coupling antenna 100 viewed from a second plan view. The overlapping multi-element coupled antenna 100 includes a feed part 10 , a first coupling part 11 , a second coupling part 12 and an extension part 13 . The feed part 10 , the first coupling part 11 , the second coupling part 12 and the extension part 13 may be radiators made of electrically conductive materials, such as good conductors but the materials are not limited thereto. Moreover, the materials of the feed part 10 , the first coupling part 11 , the second coupling part 12 and the extension part 13 may also be different or the same, or may be reasonable. change. The feed part 10 is electrically coupled to the transmission line L and is used to receive the energy transmitted by the transmission line L. The first coupling part 11 is adjacent to the feed part 10 and is used for coupling adjacent to the feed part 10 . The second coupling part 12 is adjacent to the feed part 10 and is used for coupling with the feed part 10 . The extension part 13 is coupled to the second coupling part 12 . Moreover, a part of the extension part 13 covers the feed part 10 and the first coupling part 11 . In the overlapping multi-element coupling antenna 100, when a part of the extension part 13 covers the feed part 10 and the first coupling part 11, since the extension part 13 and the second coupling part 12 are electrically coupled, the second coupling part 12 The coupling feed part 10 and the first coupling part 11 are regarded as overlapping. Furthermore, referring to FIG. 1 and FIG. 2 , the feed part 10 is located between the first coupling part 11 and the second coupling part 12 .

In the overlapping multi-element coupling antenna 100, the fixed part can be an antenna carrier, and its material can be any insulator. Moreover, as shown in FIG. 1 , the feed portion 10 and the first coupling portion 11 are located on the first plane. In other words, the feed portion 10 and the first coupling portion 11 are adjacently coupled on the first plane. Moreover, as shown in FIG. 2 , the second coupling part 12 and the extension part 13 are located on the second plane. The first plane and the second plane may be the front and back surfaces of the overlapping multi-element coupling antenna 100 . Therefore, the extension part 13 and the feed part 10 of the overlapping multi-element coupling antenna 100 are located on different planes. Moreover, after the first coupling part 11 is adjacently coupled to the feed part 10, the first coupling part 11 may generate the first frequency. For example, after the first coupling part 11 is adjacently coupled to the feed part 10, the first coupling part 11 may generate a resonance frequency of 3 GHz to 7 GHz, but is not limited thereto. In addition, after a part of the extension part 13 covers the feed part 10 and the first coupling part 11, since the extension part 13 can be regarded as overlapping the feed part 10 and the first coupling part 11, the extension part 13 can also produce a structure close to the first coupling part 10. The second frequency of the frequency. In other words, the resonance frequencies generated by the extension part 13 and the first coupling part 11 are almost the same.

Figure 3 is a schematic diagram of the relationship between components in the first step of the overlapping multi-element coupling antenna 100. Figure 4 is a schematic diagram of the relationship between components in the second step of the overlapping multi-element coupling antenna 100. Figure 5 is a schematic diagram of the relationship between components in the third step of the overlapping multi-element coupling antenna 100. In FIG. 3 , the first step of overlapping the multi-element coupling antenna 100 includes a feed part 10 and a first coupling part 11 . To be precise, in Figure 3, the feed part 10 and the first coupling part 11 are located on the first plane. (Top View). Therefore, if the overlapping multi-element coupling antenna 100 in Figure 3 is turned over and viewed from the second plane (Bottom View), the feed part 10 and the first coupling part 11 cannot be seen due to the relationship between them on the other side. element. Looking at the overlapping multi-element coupled antenna 100 in Figure 3, if we observe its radio frequency return loss (S11) parameter, it can be seen that its S11 parameter decreases after a certain frequency (such as 5GHz), such as between -10dB and -20dB. time, indicating that the overlapping multi-element coupled antenna 100 has good impedance matching at this frequency. The above parameters are only the simulation results of an embodiment and do not limit the present invention.

In Figure 4, the second step of overlapping the multi-element coupling antenna 100 adds the second coupling part 12 in the second plane (Bottom View). Before the extension part 13 is introduced, the second coupling part 12 is adjacently coupled to the feed part 10 . In Figure 4, as mentioned above, since the feed portion 10 and the first coupling portion 11 are on the first plane, if viewed from the perspective of the second plane (Bottom View), the feed portion 10 and the first coupling portion 11 will be on the back, so it is marked with the feed part (see-through) 10 and the first coupling part (see-through) 11. Looking at the overlapping multi-element coupling antenna 100 in Figure 4, if we observe its radio frequency return loss (S11) parameter, compared with Figure 3, if only the second coupling part 12 is added to the second plane, the overall performance will be degraded. Impedance matching, such as S11 parameters will rise to between -5dB and -10dB.

In FIG. 5 , the third step of overlapping the multi-element coupling antenna 100 is that the second coupling part 12 extends an extension part 13 on the second plane (Bottom View). The extension part 13 covers the feed part 10 and the first coupling part 11 . As mentioned above, since the extension part 13 covers the feed part 10 and the first coupling part 11 , the extension part 13 is electrically coupled to the second coupling part 12 . Therefore, the second coupling part 12 will be regarded as overlapping coupling with the feed part 10 and the first coupling part 11 . In other words, in the overlapping multi-element coupling antenna 100, after the feed portion 10 is vertically projected onto the second plane where the extension portion 13 is located, the projected feed portion 10 and the extension portion 13 partially overlap on the second plane. Moreover, after the first coupling part 11 is vertically projected onto the second plane where the extension part 13 is located, the projected first coupling part 11 and the extension part 13 partially overlap on the second plane. Looking at the overlapping multi-element coupled antenna 100 in Figure 4, the changes in its radio frequency return loss (S11) parameters are explained as follows. If the extension part 13 is only overlapped and coupled with the feed part 10, the overall impedance matching will be further deteriorated, such as the S11 parameter further rising. to -3dB to -5dB.

However, if the extension part 13 overlaps and couples with the feed part 10 and the first coupling part 11 at the same time, the radio frequency return loss parameter in a frequency range can be effectively optimized. For example, if the extension part 13 overlaps and couples with the feed part 10 and the first coupling part 11 at the same time, the radio frequency return loss parameter in the frequency range of 4.2GHz to 7.125GHz can be effectively optimized, and is significantly better than the S11 parameter corresponding to the structure in Figure 3 (-10dB to -20dB), such as -15dB to -25dB. However, the above frequency range includes but does not limit the embodiments of the present invention. In other embodiments, the overlapping multi-element coupling antenna 100 can optimize RF return loss parameters over any reasonable frequency range.

In summary, the present invention describes an overlapping multi-element coupling antenna. The overlapping multi-element coupling antenna can overlap and couple the second coupling part with the feed part and the first coupling part. After the second coupling part is overlapped and coupled with the feed part and the first coupling part, the radio frequency return loss parameters within a specific frequency range can be effectively optimized, and the radiation efficiency of the antenna can be increased. Moreover, the overlapping multi-element coupling antenna of the present invention has a simple structure and stable electrical performance, and is relatively less susceptible to deformation due to external force. In other words, the overlapping multi-element coupling antenna of the present invention can enhance the radiation efficiency of the antenna in a specific frequency band through multiple overlapping couplings without occupying additional space.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the patentable scope of the present invention shall fall within the scope of the present invention.

100: Overlapping multi-element coupled antenna

10: Feeding Department

11: First coupling part

12:Second coupling part

13:Extension part

20: Fixed part

L: transmission line

Claims (5)

An overlapping multi-element coupling antenna includes: a feed part electrically coupled to a transmission line; a first coupling part adjacent to the feed part for coupling adjacent to the feed part; a second coupling part, Adjacent to the feed portion, for coupling with the feed portion; and an extension portion, coupled to the second coupling portion, and partially covering the feed portion and the first coupling portion; wherein when the extension portion When a part of the feeding part and the first coupling part is covered, the second coupling part overlaps and couples the feeding part and the first coupling part, and the feeding part is located between the first coupling part and the second coupling part. The feed-in part and the first coupling part are located on a first plane, the second coupling part and the extension part are on a second plane, the extension part and the feed-in part are on different planes, and the feed-in part is vertically projected to where the extension part is. After the second plane, the projected feed portion and the extension portion partially overlap on the second plane, and the first coupling portion is vertically projected to the second plane where the extension portion is located, the projected third A coupling portion partially overlaps the extension portion on the second plane. The antenna according to claim 1, wherein after the first coupling part is adjacently coupled to the feed part, the first coupling part generates a first frequency. The antenna according to claim 2, wherein the part of the extension part covers behind the feed part and the first coupling part, and the extension part generates a second frequency close to the first frequency. The antenna according to claim 1, wherein the feed part, the first coupling part, the second coupling part and the extension part are radiators made of conductive material. The antenna according to claim 1, wherein the part of the extension part covers the feed part and the first coupling part, optimizing a radio frequency return loss (S11) parameter in a frequency range.

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