TWI761078B - Double magnetic moment antenna - Google Patents

Abstract

A double magnetic moment antenna is disclosed. The double magnetic moment antenna includes a first substrate, a signal feeding line, a main double magnetic moment antenna, an auxiliary antenna and a liquid crystal layer. The first substrate includes a first surface and a second surface. The signal feeding line is disposed on the first surface. The main double magnetic moment antenna and the auxiliary antenna are disposed on the second surface. The main double magnetic moment antenna is overlapped with the signal feeding line. The auxiliary antenna and the main double magnetic moment antenna are arranged in series. The auxiliary antenna is located in the direction towards the end of the feeding line. The liquid crystal layer is disposed on the main double magnetic moment antenna and the auxiliary antenna.

Description

Dual Magnetic Moment Antenna

The present invention relates to a dual magnetic moment antenna, in particular to a dual magnetic moment antenna which improves the forward radiation energy and reduces the back radiation energy.

The planar antenna adopts the electronic non-mechanical rotating beam scanning method, which has the advantages of high stability, the beam gain increases with the increase of the number of antenna elements, and the small size and high integration. It can be used in various fields such as millimeter-wave radar for automatic driving assistance systems, automatic navigation beyond the sight of unmanned aerial vehicles, satellite positioning and navigation systems, wireless communication area network systems, long-distance monitoring of physiological characteristics, wireless power transmission and fifth-generation mobile communications. among.

The antenna unit of the planar antenna mainly uses a medium that can adjust the dielectric constant around the electrode, such as liquid crystal, and uses the voltage to control the direction of the liquid crystal molecules, changing the dielectric constant of the medium, and then changing the capacitance value in the resonant circuit. make the resonance frequency different. When the antenna unit gives different control voltages to the liquid crystal through the electrodes, the antenna unit can generate different resonance frequency responses, adjust the operating frequency of the antenna appropriately, control the radiation intensity of electromagnetic waves, and arrange the antenna units in an array to achieve a specific angle. beam scanning function.

By designing a dual magnetic moment antenna, the present invention improves the deficiencies of the prior art, thereby enhancing the implementation and utilization in the industry.

In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a dual magnetic moment antenna, which can solve the problem of energy leakage generated at the end of the feeding line during the energy transfer process.

According to the above objective, an embodiment of the present invention provides a dual magnetic moment antenna, which includes a first substrate, a signal feeding line, a main dual magnetic moment antenna, an auxiliary antenna, and a liquid crystal layer. The first substrate includes a first surface and a second surface opposite to the first surface. The signal feeding line is arranged on the first surface. The main dual magnetic moment antenna is disposed on the second surface, the main dual magnetic moment antenna overlaps with the signal feeding line to form an overlapping area, and the end of the feeding wire of the signal feeding line has an end distance from the overlapping area. The auxiliary antenna is arranged on the second surface, and the auxiliary antenna is arranged in series with the main dual magnetic moment antenna and is located in the direction of the main dual magnetic moment antenna toward the end of the feeding line. The liquid crystal layer is arranged on the main dual magnetic moment antenna and the auxiliary antenna.

In an embodiment of the present invention, the main dual magnetic moment antenna may include a main first electrode and a main second electrode, the main first electrode is a ring electrode, the main second electrode is a rectangular electrode, and the main first electrode partially overlaps the main first electrode. Two electrodes.

In the embodiment of the present invention, the auxiliary antenna may be an auxiliary dual magnetic moment antenna, the auxiliary dual magnetic moment antenna includes an auxiliary first electrode and an auxiliary second electrode, the auxiliary first electrode is a ring electrode, and the auxiliary second electrode is a rectangular electrode, The auxiliary first electrode partially overlaps the auxiliary second electrode.

In the embodiment of the present invention, the auxiliary antenna may be an auxiliary single magnetic moment antenna, the auxiliary single magnetic moment antenna includes an auxiliary first electrode and an auxiliary second electrode, the auxiliary first electrode is a ring electrode, and the auxiliary second electrode is a rectangular electrode, The auxiliary first electrode partially overlaps the auxiliary second electrode.

In the embodiment of the present invention, the auxiliary antenna may be a slot-patch antenna, and the slot-patch antenna includes a groove and a patch electrode, and the patch electrode partially overlaps the groove.

In an embodiment of the present invention, the area of the auxiliary antenna may be equal to the area of the main dual magnetic moment antenna.

In an embodiment of the present invention, the area of the auxiliary antenna may be smaller than that of the main dual magnetic moment antenna.

In the embodiment of the present invention, there may be a series connection distance between the main dual magnetic moment antenna and the auxiliary antenna, and the series connection distance is greater than 2/3 of the end distance.

In the embodiment of the present invention, the main dual magnetic moment antenna and the auxiliary antenna may have a series connection distance between the installation positions, and the series connection distance is between 1/3 of the end distance and 2/3 of the end distance.

In the embodiment of the present invention, the installation positions of the main dual-magnetic moment antenna and the auxiliary antenna may have a series connection distance, and the series connection distance is less than 2/3 of the end distance.

Another embodiment of the present invention provides a dual magnetic moment antenna, which includes a first substrate, a signal feeding line, a main dual magnetic moment antenna, an auxiliary antenna, and a liquid crystal layer. The first substrate includes a first surface and a second surface opposite to the first surface. The signal feeding line is arranged on the first surface. The main dual magnetic moment antenna is disposed on the second surface, and the main dual magnetic moment antenna overlaps with the end of the feeding line of the signal feeding line to form an overlapping area. The liquid crystal layer is disposed on the main dual magnetic moment antenna.

Continuing from the above, according to the dual magnetic moment antenna disclosed in the embodiment of the present invention, an auxiliary antenna can be arranged in the direction of the end of the feed line, so as to solve the problem that leakage waves are generated at the end and affect the forward energy pattern of the antenna, and avoid the problem of When a matrix is formed, the back radiation causes the antenna elements to resonate and affects the antenna frequency.

10, 30, 40, 50, 60: Dual Magnetic Moment Antennas

11, 21, 31, 41, 51, 61: First substrate

11a, 61a: first surface

11b, 61b: Second surface

12,22,32,42,52,62: Signal feed line

13, 23, 33, 43, 53, 63: Main Dual Moment Antennas

14, 34, 34A, 44, 44A, 54, 54A: Auxiliary Antennas

15, 25, 35, 45, 55, 65: Liquid crystal layer

16, 26, 36, 46, 56, 66: Second substrate

24: Electrode layer

24H: Slotted hole

24L: Connection line

27: Third substrate

D1: The first setting area

D2: Second setting area

D3: The third setting area

E: Feed-in line end

E1: The first electrode

E11: Main first electrode

E12, E13, E14, E15: auxiliary first electrode

E2: Second electrode

E21: Main second electrode

E22, E23, E24, E25: auxiliary second electrode

OA: Overlap Area

PCB: Printed Circuit Board

In order to make the technical features, content and advantages of the present invention and the effects that can be achieved more obvious, the present invention is hereby combined with the accompanying drawings, and is described in detail in the form of an embodiment as follows: Figure 1 is an embodiment of the present invention. Schematic diagram of a dual magnetic moment antenna.

FIG. 2A and FIG. 2B are schematic diagrams of the main dual magnetic moment antenna according to the embodiment of the present invention.

FIG. 3A is a schematic diagram of the auxiliary antenna according to the first embodiment of the present invention.

FIG. 3B is a schematic diagram of the auxiliary antenna according to the second embodiment of the present invention.

FIG. 4A is a schematic diagram of an auxiliary antenna according to a third embodiment of the present invention.

FIG. 4B is a schematic diagram of the auxiliary antenna according to the fourth embodiment of the present invention.

FIG. 5A is a schematic diagram of an auxiliary antenna according to a fifth embodiment of the present invention.

FIG. 5B is a schematic diagram of the auxiliary antenna according to the sixth embodiment of the present invention.

FIG. 6 is a schematic diagram of a dual magnetic moment antenna according to another embodiment of the present invention.

In order to facilitate the understanding of the technical features, content and advantages of the present invention and the effects that can be achieved, the present invention is hereby described in detail with the accompanying drawings, and in the form of embodiments as follows, and the drawings used therein are only for the purpose of For the purpose of illustrating and assisting the description, it is not necessarily the real proportion and precise configuration after the implementation of the present invention. Therefore, the proportion and configuration relationship of the attached drawings should not be interpreted or limited to the scope of rights of the present invention in actual implementation. Say Ming.

In the drawings, the thickness or width of layers, films, panels, regions, light guides, etc., are exaggerated for clarity. The same reference numerals refer to the same elements throughout the specification. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements can be also exists. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may refer to the existence of other elements between the two elements. Furthermore, it will be understood that, although the terms “first,” “second,” and “third” may be used herein to describe various elements, components, regions, layers and/or sections, they are , region, layer and/or section is distinguished from another element, component, region, layer and/or section. Therefore, it is for descriptive purposes only and should not be construed to indicate or imply relative importance or their sequential relationship.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be construed as having meanings consistent with their meanings in the context of the related art and the present invention, and are not to be construed as idealized or excessive Formal meaning unless expressly so defined herein.

Please refer to FIG. 1 , which is a schematic diagram of a dual magnetic moment antenna according to an embodiment of the present invention. The left side of FIG. 1 is a side view of the dual magnetic moment antenna, and the right side of FIG. 1 is a plan view of the dual magnetic moment antenna. As shown in the side view, the dual magnetic moment antenna 10 includes a first substrate 11 , a signal feeding line 12 , a main dual magnetic moment antenna 13 , an auxiliary antenna 14 and a liquid crystal layer 15 . The first substrate 11 can be a glass substrate, and the substrate includes a first surface 11a and a second surface 11b opposite to the first surface 11a. In this embodiment, the first surface 11a of the first substrate 11 is disposed on the printed circuit board PCB, the signal feed line 12 is disposed on the first surface 11a through the printed circuit board PCB, and the signal feed line 12 can extend to the printed circuit board One end of the PCB is coupled to the signal source through a line.

The main dual magnetic moment antenna 13 and the auxiliary antenna 14 are disposed on the second surface 11b, and the liquid crystal layer 15 is disposed on the main dual magnetic moment antenna 13 and the auxiliary antenna 14, covering or filling the main dual magnetic moment antenna 13 and the auxiliary antenna 14. The dielectric constant of the liquid crystal layer 15 changes due to the change of the direction of the liquid crystal guide axis, and the electric field Turning the liquid crystal in the liquid crystal layer 15 can change the dielectric coefficient, adjust the resonant frequency of the main dual magnetic moment antenna 13 and the auxiliary antenna 14 , and then change the radiation intensity of the dual magnetic moment antenna 10 . A second substrate 16 is disposed on the liquid crystal layer 15 , and the second substrate 16 may be a glass substrate, covering the main dual magnetic moment antenna 13 and the auxiliary antenna 14 .

Combined with the schematic plan view, the main dual magnetic moment antenna 13 overlaps with the signal feed line 12 to form an overlap area OA. The signal feed line 12 has an end distance Stun from the overlap area OA to the end E of the feed line. The structure of the end E of the feed line will cause spillage in the process of energy transfer, and leakage waves will be generated to both sides and the end. The higher the frequency of the antenna, the higher the leakage energy. The back-radiation at the tail end of the signal feed line 12 directly affects the forward electric field pattern due to destructive interference. When the back-radiated leaky waves form a matrix, they will also resonate with other antennas and affect the antenna. frequency. In this regard, in this embodiment, the auxiliary antenna 14 is provided in the direction of the main dual magnetic moment antenna 13 toward the end E of the feed line, and the auxiliary antenna 14 and the main dual magnetic moment antenna 13 are arranged on the second surface 11b in series.

In this embodiment, the auxiliary antenna 14 is disposed at the end of the signal feed line 12 , that is, the auxiliary antenna 14 overlaps or partially overlaps the end E of the feed line. When the auxiliary antenna 14 is located in such a first setting area D1, the auxiliary antenna 14 There is a series distance between the antenna 14 and the main dual magnetic moment antenna 13, and this series distance is greater than 2/3 of the end distance Stun. By arranging the auxiliary antenna 14 in the first setting area D1, the forward radiation energy of the dual magnetic moment antenna 10 can be increased by about 30%, and the backward radiation energy can be reduced by about 60%. However, the present disclosure is not limited to this setting area. In other embodiments, the auxiliary antenna 14 can be arranged in the second setting area D2, and the series distance between the auxiliary antenna 14 and the main dual magnetic moment antenna 13 is 1/3 between the end distance Stun and 2/3 the end distance Stun. By arranging the auxiliary antenna 14 in the second setting area D2, the forward radiation energy of the dual magnetic moment antenna 10 can be increased by about 200%, and the backward radiation energy can be reduced by about 40%. In another embodiment, the auxiliary antenna 14 may be disposed in the third setting area D3, and the series distance between the auxiliary antenna 14 and the main dual magnetic moment antenna 13 is less than 2/3 of the end distance Stun. By arranging the auxiliary antenna 14 in the third By setting the area D3, the forward radiation energy of the dual magnetic moment antenna 10 can be increased by about 200%, and the backward radiation energy can be reduced by about 16%. It can be known from the above embodiment that when the auxiliary antenna 14 is arranged in the direction of the main dual magnetic moment antenna 13 towards the end E of the feed line, and is arranged in series with the main dual magnetic moment antenna 13, the forward energy for increasing the main frequency is equal to Reducing the back energy was significantly improved.

Please refer to FIG. 2A and FIG. 2B at the same time, which are schematic diagrams of the main dual magnetic moment antenna according to the embodiment of the present invention, FIG. 2A is a schematic plan view of the main dual magnetic moment antenna, and FIG. 2B is along the dotted line in FIG. 2A Schematic cross-section of AA'. As shown in the figure, the main dual magnetic moment antenna 23 includes a first electrode E1 and a second electrode E2, the first electrode E1 and the second electrode E2 are disposed on the upper surface of the first substrate 21, and the signal feeding line 22 is disposed on the first electrode E1 and the second electrode E2. On the lower surface of the substrate 21 , the first electrode E1 is a rectangular electrode, the second electrode E2 is a ring electrode, and the rectangular electrode partially overlaps the ring electrode. The first electrode E1 and the electrode layer 24 are the same conductive electrode layer. The electrode layer 24 has a hollow slot 24H structure. The first electrode E1 is disposed in the slot 24H and is electrically connected to the electrode layer 24 through the connecting line 24L.

The liquid crystal layer 25 is arranged between the first electrode E1 and the second electrode E2, and the direction of the liquid crystal molecules in the liquid crystal layer 25 is controlled by the voltage of the first electrode E1 and the second electrode E2, thereby changing the dielectric coefficient of the liquid crystal material, so that the A resonant circuit (LC resonance circuit) of equivalent inductance and capacitance is formed between the metal electrode and the liquid crystal material, thereby adjusting the resonant frequency of the planar antenna circuit. In this embodiment, the first electrode E1 , the second electrode E2 and the liquid crystal layer 25 are disposed between the first substrate 21 and the second substrate 26 , and the signal feeding line 22 is disposed between the first substrate 21 and the third substrate 27 , the first substrate 21 , the second substrate 26 and the third substrate 27 may be glass substrates.

Please refer to FIG. 3A , which is a schematic diagram of the auxiliary antenna according to the first embodiment of the present invention. As shown in the figure, the dual magnetic moment antenna 30 includes a first substrate 31 , a signal feeding line 32 , a main dual magnetic moment antenna 33 , an auxiliary antenna 34 and a liquid crystal layer 35 . The signal feeding line 32 is disposed on the first substrate 31 through the printed circuit board PCB Above, the main dual magnetic moment antenna 33, the auxiliary antenna 34 and the liquid crystal layer 35 are arranged between the first substrate 31 and the second substrate 36, the auxiliary antenna 34 and the main dual magnetic moment antenna 33 can change the liquid crystal molecules through electrodes, and then use This is frequency modulated to achieve the desired antenna frequency.

In this embodiment, the main dual magnetic moment antenna 33 is the dual magnetic moment antenna as described in the previous embodiment, and the auxiliary antenna 34 and the main dual magnetic moment antenna 33 are also dual magnetic moment antennas. The main dual magnetic moment antenna 33 includes a main first electrode E11 and a main second electrode E21, the main first electrode E11 is a ring electrode, the main second electrode E21 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. The auxiliary antenna 34 includes an auxiliary first electrode E12 and an auxiliary second electrode E22, the auxiliary first electrode E12 is a ring electrode, the auxiliary second electrode E22 is a rectangular electrode, and the rectangular electrode partially overlaps with the ring electrode. The main dual magnetic moment antenna 33 and the auxiliary antenna 34 have the same area, that is, the resonant frequency of the auxiliary antenna 34 is the same as that of the main dual magnetic moment antenna 33, which can increase the forward energy of the main frequency.

Please refer to FIG. 3B , which is a schematic diagram of the auxiliary antenna according to the second embodiment of the present invention, which is similar to the dual magnetic moment antenna of FIG. 3A , and the same structures are denoted by the same symbols. As shown in the figure, the dual magnetic moment antenna 30 includes a first substrate 31 , a signal feeding line 32 , a main dual magnetic moment antenna 33 , an auxiliary antenna 34A and a liquid crystal layer 35 . The signal feed line 32 is disposed on the first substrate 31 through the printed circuit board PCB. The main dual magnetic moment antenna 33 , the auxiliary antenna 34A and the liquid crystal layer 35 are disposed between the first substrate 31 and the second substrate 36 .

In this embodiment, the main dual magnetic moment antenna 33 and the auxiliary antenna 34A are also dual magnetic moment antennas. The main dual magnetic moment antenna 33 includes a main first electrode E11 and a main second electrode E21, the main first electrode E11 is a ring electrode, the main second electrode E21 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. The auxiliary antenna 34A includes an auxiliary first electrode E13 and an auxiliary second electrode E23, the auxiliary first electrode E13 is a ring electrode, the auxiliary second electrode E23 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. Different from the previous embodiment, the area of the auxiliary antenna 34A is smaller than that of the main dual magnetic moment antenna 33, that is, The resonant frequency of the auxiliary antenna 34A is higher than the resonant frequency of the main dual magnetic moment antenna 33, which can suppress the back-radiated energy of higher frequencies.

Please refer to FIG. 4A , which is a schematic diagram of an auxiliary antenna according to a third embodiment of the present invention. As shown in the figure, the dual magnetic moment antenna 40 includes a first substrate 41 , a signal feeding line 42 , a main dual magnetic moment antenna 43 , an auxiliary antenna 44 and a liquid crystal layer 45 . The signal feeding line 42 is disposed on the first substrate 41 through the printed circuit board PCB, the main dual magnetic moment antenna 43, the auxiliary antenna 44 and the liquid crystal layer 45 are disposed between the first substrate 41 and the second substrate 46, the auxiliary antenna 44 and the main Both the dual magnetic moment antennas 43 can change the liquid crystal molecules through electrodes, and then perform frequency modulation to achieve the desired antenna frequency. The same structure as that of the previous embodiment will not be described repeatedly.

In this embodiment, the main dual magnetic moment antenna 43 is a dual magnetic moment antenna, and the auxiliary antenna 44 is a single magnetic moment antenna. The main dual magnetic moment antenna 43 includes a main first electrode E11 and a main second electrode E21, the main first electrode E11 is a ring electrode, the main second electrode E21 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. The auxiliary antenna 44 includes an auxiliary first electrode E14 and an auxiliary second electrode E24, the auxiliary first electrode E14 is a ring electrode, the auxiliary second electrode E24 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. The main dual magnetic moment antenna 43 and the auxiliary antenna 44 have the same area, that is, the resonant frequency of the auxiliary antenna 44 is the same as that of the main dual magnetic moment antenna 43, which can increase the forward energy of the main frequency.

Please refer to FIG. 4B , which is a schematic diagram of an auxiliary antenna according to a fourth embodiment of the present invention, which is similar to the dual magnetic moment antenna in FIG. 4A , and the same structures are represented by the same symbols. As shown in the figure, the dual magnetic moment antenna 40 includes a first substrate 41 , a signal feeding line 42 , a main dual magnetic moment antenna 43 , an auxiliary antenna 44A and a liquid crystal layer 45 . The signal feeding line 42 is disposed on the first substrate 41 through the printed circuit board PCB. The main dual magnetic moment antenna 43 , the auxiliary antenna 44A and the liquid crystal layer 45 are disposed between the first substrate 41 and the second substrate 46 .

In this embodiment, the main dual magnetic moment antenna 43 is a dual magnetic moment antenna, and the auxiliary antenna 44 is a single magnetic moment antenna. The main dual magnetic moment antenna 43 includes a main first electrode E11 and a main second electrode E21, the main The first electrode E11 is a ring-shaped electrode, and the main second electrode E21 is a rectangular electrode, and the rectangular electrode and the ring-shaped electrode are partially overlapped. The auxiliary antenna 44A includes an auxiliary first electrode E15 and an auxiliary second electrode E25, the auxiliary first electrode E15 is a ring electrode, the auxiliary second electrode E25 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. Different from the previous embodiment, the area of the auxiliary antenna 44A is smaller than that of the main dual-magnetic-moment antenna 43, that is, the resonant frequency of the auxiliary antenna 44A is greater than that of the main dual-magnetic-moment antenna 43, which can suppress higher frequency backlash. radiant energy.

Please refer to FIG. 5A , which is a schematic diagram of an auxiliary antenna according to a fifth embodiment of the present invention. As shown in the figure, the dual magnetic moment antenna 50 includes a first substrate 51 , a signal feeding line 52 , a main dual magnetic moment antenna 53 , an auxiliary antenna 54 and a liquid crystal layer 55 . The signal feed line 52 is disposed on the first substrate 51 through the printed circuit board PCB, the main dual magnetic moment antenna 53, the auxiliary antenna 54 and the liquid crystal layer 55 are disposed between the first substrate 51 and the second substrate 56, the auxiliary antenna 54 and the main Both the dual magnetic moment antennas 53 can change the liquid crystal molecules through electrodes, and then perform frequency modulation to achieve the desired antenna frequency. The same structure as that of the previous embodiment will not be described repeatedly.

In this embodiment, the main dual magnetic moment antenna 53 is a dual magnetic moment antenna, and the auxiliary antenna 54 is a slot-patch antenna. The main dual magnetic moment antenna 53 includes a main first electrode E11 and a main second electrode E21, the main first electrode E11 is a ring electrode, the main second electrode E21 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. The auxiliary antenna 54 includes a trench Tr1 and a patch electrode EP1, and the patch electrode EP1 partially overlaps the trench Tr1. The main dual magnetic moment antenna 53 and the auxiliary antenna 54 have the same area, that is, the resonant frequency of the auxiliary antenna 54 is the same as that of the main dual magnetic moment antenna 53, which can increase the forward energy of the main frequency.

Please refer to FIG. 5B , which is a schematic diagram of an auxiliary antenna according to a sixth embodiment of the present invention, which is similar to the dual magnetic moment antenna of FIG. 5A , and the same structures are represented by the same symbols. As shown in the figure, the dual magnetic moment antenna 50 includes a first substrate 51, a signal feeding line 52, a main dual magnetic moment antenna 53, an auxiliary antenna 54A, and a liquid crystal layer 55 . The signal feeding line 52 is disposed on the first substrate 51 through the printed circuit board PCB. The main dual magnetic moment antenna 53 , the auxiliary antenna 54A and the liquid crystal layer 55 are disposed between the first substrate 41 and the second substrate 46 .

In this embodiment, the main dual magnetic moment antenna 53 is a dual magnetic moment antenna, and the auxiliary antenna 54A is a slot patch antenna. The main dual magnetic moment antenna 53 includes a main first electrode E11 and a main second electrode E21, the main first electrode E11 is a ring electrode, the main second electrode E21 is a rectangular electrode, and the rectangular electrode and the ring electrode partially overlap. The auxiliary antenna 54A includes a trench Tr2 and a patch electrode EP2, and the patch electrode EP2 partially overlaps the trench Tr2. Different from the previous embodiment, the area of the auxiliary antenna 54A is smaller than that of the main dual-magnetic-moment antenna 53, that is, the resonant frequency of the auxiliary antenna 54A is greater than that of the main dual-magnetic-moment antenna 53, which can suppress higher-frequency backlash. radiant energy.

In the above-mentioned different auxiliary antenna embodiments, the setting position of the auxiliary antenna is located in the first setting area D1, that is, the end distance Stun where the series distance between the two antennas is greater than 2/3. However, the present disclosure is not limited thereto, and in other embodiments, the auxiliary antenna may also be disposed in the second setting area D2 or the third setting area D3, and may be adjusted according to product requirements to improve forward radiation or backward radiation.

Please refer to FIG. 6 , which is a schematic diagram of a dual magnetic moment antenna according to another embodiment of the present invention. The left side of FIG. 6 is a side view of the dual magnetic moment antenna, and the right side of FIG. 6 is a plan view of the dual magnetic moment antenna. As shown in the side view, the dual magnetic moment antenna 60 includes a first substrate 61 , a signal feeding line 62 , a main dual magnetic moment antenna 63 and a liquid crystal layer 65 . The first substrate 61 can be a glass substrate, and the substrate includes a first surface 61a and a second surface 61b opposite to the first surface 61a. In this embodiment, the first surface 11a of the first substrate 61 is disposed on the printed circuit board PCB, the signal feeding line 62 is disposed on the first surface 61a through the printed circuit board PCB, and the signal feeding line 62 can extend to the printed circuit board One end of the PCB is coupled to the signal source through a line.

The main dual magnetic moment antenna 63 is disposed on the second surface 61 b , and the liquid crystal layer 65 is disposed on the main dual magnetic moment antenna 63 , covering or filling the main dual magnetic moment antenna 63 . The dielectric constant of the liquid crystal layer 65 is due to the liquid crystal The direction of the guide shaft changes, and the liquid crystal in the liquid crystal layer 65 is turned by the electric field, which can change the dielectric coefficient, adjust the resonant frequency of the main dual magnetic moment antenna 63 , and then change the radiation intensity of the dual magnetic moment antenna 60 . A second substrate 66 is disposed on the liquid crystal layer 65 , and the second substrate 66 may be a glass substrate, covering the main dual magnetic moment antenna 63 .

In combination with the schematic plan view, the main dual magnetic moment antennas 63 are arranged at positions overlapping the end E of the feed line. Since the structure of the end E of the feed line will cause spillage in the process of energy transfer, leakage waves will be generated to both sides and the end. The end E of the feed line suppresses the leakage wave at the end, avoids the influence of the forward electric field of the dual magnetic moment antenna 60, and also prevents the back radiation from resonating with other antennas and affecting the antenna frequency.

The above description is exemplary only, not limiting. Any equivalent modifications or changes that do not depart from the spirit and scope of the present invention shall be included in the appended patent application scope.

10: Dual Magnetic Moment Antenna

11: The first substrate

11a: First surface

11b: Second surface

12: Signal feed line

13: Main dual magnetic moment antenna

14: Auxiliary antenna

15: Liquid crystal layer

16: Second substrate

D1: The first setting area

D2: Second setting area

D3: The third setting area

E: Feed-in line end

OA: Overlap Area

PCB: Printed Circuit Board

Claims (11)

A dual magnetic moment antenna, comprising: a first substrate including a first surface and a second surface opposite to the first surface; a signal feeding line disposed on the first surface; a main dual magnetic moment an antenna, disposed on the second surface, the main dual magnetic moment antenna overlaps the signal feed line to form an overlapping area, a feed line end of the signal feed line has an end distance from the overlap area; an auxiliary antenna, Disposed on the second surface, the auxiliary antenna and the main dual magnetic moment antenna are arranged in series and located in the direction of the main dual magnetic moment antenna towards the end of the feed line, the main dual magnetic moment antenna and the auxiliary antenna are arranged There is a series connection distance between the positions; and a liquid crystal layer is arranged on the main dual magnetic moment antenna and the auxiliary antenna. The dual magnetic moment antenna of claim 1, wherein the main dual magnetic moment antenna comprises a main first electrode and a main second electrode, the main first electrode is a ring electrode, the main second electrode is a rectangular electrode, The main first electrode partially overlaps the main second electrode. The dual magnetic moment antenna of claim 2, wherein the auxiliary antenna is an auxiliary dual magnetic moment antenna, the auxiliary dual magnetic moment antenna comprises an auxiliary first electrode and an auxiliary second electrode, and the auxiliary first electrode is annular electrode, the auxiliary second electrode is a rectangular electrode, and the auxiliary first electrode partially overlaps the auxiliary second electrode. The dual magnetic moment antenna of claim 2, wherein the auxiliary antenna is an auxiliary single magnetic moment antenna, and the auxiliary single magnetic moment antenna comprises an auxiliary first electrode and an auxiliary The second electrode, the auxiliary first electrode is a ring electrode, the auxiliary second electrode is a rectangular electrode, and the auxiliary first electrode is partially overlapped with the auxiliary second electrode. The dual magnetic moment antenna of claim 2, wherein the auxiliary antenna is a slot patch antenna, the slot patch antenna comprises a groove and a patch electrode, and the patch electrode partially overlaps the groove . The dual magnetic moment antenna of claim 1, wherein the area of the auxiliary antenna is equal to the area of the main dual magnetic moment antenna. The dual magnetic moment antenna of claim 1, wherein the area of the auxiliary antenna is smaller than that of the main dual magnetic moment antenna. The dual magnetic moment antenna of claim 1, wherein the series connection distance is greater than 2/3 of the end distance. The dual magnetic moment antenna of claim 1, wherein the series connection distance is between 1/3 of the end distance and 2/3 of the end distance. The dual magnetic moment antenna of claim 1, wherein the series connection distance is less than 2/3 of the end distance. A dual magnetic moment antenna, comprising: a first substrate including a first surface and a second surface opposite to the first surface; a signal feeding line disposed on the first surface; a main dual magnetic moment The antenna is disposed on the second surface, the main dual magnetic moment antenna overlaps with an end of a feeding line of the signal feeding line to form an overlapping area; and a liquid crystal layer is disposed on the main dual magnetic moment antenna.

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