TWI763276B - Antenna module - Google Patents

Abstract

An antenna module includes a first antenna, a second antenna and a feed line. The second antenna is perpendicular to the first antenna. The feed line connects the first antenna with the second antenna in series.

Description

Antenna module

The present invention relates to a module, and more particularly, to an antenna module.

Satellite signal transmission requires an antenna module that can provide circularly polarized wireless signals. The conventional antenna module includes several antennas and several feed lines. In order to excite the circularly polarized wireless signal, the structure and/or extension direction of the antenna and the feed line may cause the distance between the two adjacent antennas to be too large, for example, greater than one air wavelength λ, which leads to the radiation field of the antenna module. The main lobe (major lobe) and the side lobe (side lobe) of the shape map are close in characteristics or positions and are difficult to distinguish, which leads to difficulties in application. Therefore, providing a new antenna module to increase the difference between the main lobe and the side lobe of the radiation pattern of the antenna module is an important issue for those skilled in the art.

Therefore, the present invention provides an antenna module which can improve the conventional problems.

An embodiment of the present invention provides an antenna module. The antenna module includes a first antenna, a second antenna and a feeding line. The feed line electrically connects the first antenna and the second antenna. Either one of the first antenna and the second antenna includes a first substrate, a first electrode, a second electrode and an auxiliary electrode. The first substrate has a first surface and a second surface opposite to each other. The first electrode is located on the second surface of the first substrate and overlaps with the feeding line, wherein the first electrode is annular. The second electrode has a through hole, and the through hole overlaps with the first electrode. The auxiliary electrode is located in the through hole and partially overlaps the first electrode. The feeding line is disposed on the first surface of the first substrate.

Another embodiment of the present invention provides an antenna module. The antenna module includes a first antenna, a second antenna and a feeding line. The second antenna is arranged perpendicular to the first antenna. The feed line connects the first antenna and the second antenna in series.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given and described in detail in conjunction with the accompanying drawings as follows:

10a: Antenna unit

100, 100’, 200, 300, 400: Antenna Module

110: The first antenna

111: The first substrate

112: The first electrode

113: Second electrode

113a: Through hole

114: auxiliary electrode

115: Second substrate

116: dielectric layer

120: The second antenna

111b: first side

111u: second side

130, 230, 330, 430: Feed line

131,231: Single straight line segment

131A, 231A, 334A: first end

131B, 231B, 334B: Second end

132: Transmission segment

331,431: First straight line segment

333,433: Second straight line segment

334: Third straight line segment

A1, A2: included angle

C11~C14, C21~C24, C31~C34: Curve

D1: first direction

D2: Second direction

D3: extension direction

H1: Distance

L _X ,L _Y : length

R1: Region

λ: Air wavelength

FIG. 1A shows a top view of an antenna module according to an embodiment of the present invention.

FIG. 1B shows a back view of the antenna module of FIG. 1A.

FIG. 1C is a cross-sectional view of the antenna module of FIG. 1A along the direction 1B-1B'.

FIG. 2 shows the relationship between the frequency and the far-field radiated energy and the relationship between the frequency and the axial ratio of the antenna module of FIG. 1A according to the simulation results.

FIG. 3 is a top view of an antenna module according to an embodiment of the present invention.

FIG. 4A shows a top view of an antenna module according to another embodiment of the present invention.

FIG. 4B is a back view of the antenna module of FIG. 4A.

FIG. 5 is a back view of an antenna module according to another embodiment of the present invention.

FIG. 6 is a back view of an antenna module according to another embodiment of the present invention.

FIG. 7 is a graph showing the correlation between the frequency and the radiated energy of the antenna module at different angles according to an embodiment of the present invention.

Please refer to FIGS. 1A and 1B. FIG. 1A shows a top view of an antenna module 100 according to an embodiment of the present invention, FIG. 1B shows a back view of the antenna module 100 of FIG. 1A, and FIG. 1C shows a The cross-sectional view of the antenna module 100 in FIG. 1A along the direction 1B-1B'.

As shown in FIG. 1A , the antenna module 100 includes a first antenna 110 , a second antenna 120 and a feeding line 130 . The first antenna 110 and the second antenna 120 are vertically disposed (for example, the included angle A1 between the first antenna 110 and the second antenna 120 is approximately 90 degrees). As shown in FIG. 1C , the feeding line 130 is connected in series with the first antenna 110 and the second antenna 120 . The first antenna 110 and the second antenna 120 respectively excite two linearly polarized signals perpendicular to each other, and the two linearly polarized signals arranged perpendicular to each other have a phase difference of 90 degrees, which can be coupled to form a circularly polarized wireless signal. In other words, the antenna module 100 of the embodiment of the present invention can be used as a circularly polarized polarized antenna module, which is suitable for satellite signal transmission.

In the embodiment, the first antenna 110 and the second antenna 120 are, for example, coplanar configuration, for example, the first antenna 110 and the second antenna 120 extend along the XY plane. The first antenna 110 and the second antenna 120 are vertically arranged on the XY plane (the same plane), for example.

The structure of the first antenna 110 is at least partially the same as the structure of the second antenna 120 , and the first antenna 110 is used as an example for description below.

As shown in FIG. 1A , the first antenna 110 and the second antenna 120 extend along a straight line, so that a good linearly polarized signal can be provided. As shown in FIG. 1C , the first antenna 110 includes a first substrate 111 , a first electrode 112 , a second electrode 113 , and an auxiliary electrode 114 , the second substrate 115 and the dielectric layer 116 .

As shown in FIGS. 1A and 1C, the first substrate 111 has a first surface 111b and a second surface 111u opposite to each other. The first electrode 112 is located on the second surface 111u of the first substrate 111 and overlaps with the feeding line 130 , wherein the first electrode 112 is annular. The second electrode 113 has a through hole 113 a, and the through hole 113 a overlaps with the first electrode 112 . The auxiliary electrode 114 is located in the through hole 113 a and partially overlaps the first electrode 112 . The feeding line 130 is disposed on the first surface 111 b of the first substrate 111 . In this way, the first antenna 110 can excite the linearly polarized signal.

As shown in FIG. 1C , the first electrode 112 and the feeding line 130 overlap, for example, along the thickness direction (eg, the Z-axis) of the antenna module 100 , and the auxiliary electrode 114 and the first electrode 112 are along the thickness of the antenna module 100 . The directions (eg, Z-axis) partially overlap.

As shown in FIG. 1C , the second substrate 115 is disposed opposite to the first substrate 111 , and the first electrode 112 , the second electrode 113 , the auxiliary electrode 114 and the dielectric layer 116 are located between the second substrate 115 and the first substrate 111 .

As shown in FIG. 1A , the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 allows the linearly polarized signal excited by the first antenna 110 to communicate with the second antenna. The phase difference of the linearly polarized signal excited by 120 is approximately 90 degrees. In this way, the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be coupled to form a circularly polarized wireless signal. The embodiment of the present invention does not limit the value of the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 , which may be determined by the included angle A2 of the first antenna 110 relative to the X-axis.

As shown in FIG. 1A , in this embodiment, the first antenna 110 is opposite to X The axial included angle A2 is, for example, 45 degrees, the shortest distance H1 can be between 0.2λ~0.3λ, and the longest distance H1 can be between 0.7λ~0.8λ, where λ is the air wavelength. In this way, the phase difference between the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be approximately 90 degrees. However, as long as the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 is less than one air wavelength λ, the embodiment of the present invention does not limit the specific value of the distance H1.

As shown in FIG. 1A , the first antenna 110 and the second antenna 120 may be located in a region R1 . The region R1 is, for example, a polygon, a circle, an ellipse, etc. This embodiment is described by taking a polygon, such as a square, as an example. The side length of the region R1 is less than 1 air wavelength λ. In other words, due to the linear (eg, extending in a straight line) antenna structure design of the embodiment of the present invention, the first antenna 110 and the second antenna 120 can be arranged in a small area R1 . One side of the region R1 may be parallel to the X axis of the drawing, and the adjacent side of the region R1 may be parallel to the Y axis. The first antenna 110 and/or the second antenna 120 may be located at any position in the region R1, which is not limited in the embodiment of the present invention.

As shown in FIG. 1A , the distribution length L _X of the first antenna 110 and the second antenna 120 along the X axis is, for example, less than 0.15λ, and the distance between the first antenna 110 and the second antenna 120 along the Y axis The distribution length L _Y is, for example, less than 0.3λ, wherein the distribution lengths L _X and L _Y are regarded as the overall size of the antenna module. The embodiments of the present invention do not limit the values of the distribution lengths L _X and L _Y , as long as the distribution lengths L _X and L _Y are less than one air wavelength λ (for example, located in the region R1 ), the embodiments of the present invention do not limit the distribution length L Specific values of _X and _LY .

In a simulation result, the ratio of the left circular polarization (LHCP) to the right circular polarization (RHCP) of the antenna module 100 is approximately 1000:1 (LHCP:RHCP= 1000:1), it can be seen that the antenna module 100 can couple out a circularly polarized wireless signal (the greater the ratio of LHCP to RHCP, the higher the degree of circularly polarized polarization).

The dielectric layer 116 is located between the first electrode 112 and the auxiliary electrode 114 . In this embodiment, the dielectric layer 116 includes liquid crystal. The dielectric constant of the dielectric layer 116 changes as the orientation of the liquid crystal guide axis changes. In other words, by turning the liquid crystal in the dielectric layer 116 by an electric field, the dielectric constant of the dielectric layer 116 can be changed. Since the resonant frequency of the antenna module 100 is directly affected by the dielectric coefficient of the dielectric layer 116 , the radiation intensity of the antenna module 100 is changed. Therefore, the dielectric layer 116 can be used as a switch of the antenna module 100 . In this embodiment, the first electrode 112 is actually electrically connected with other wires (not shown) and/or active elements (not shown), so an electric field can be formed between the first electrode 112 and the auxiliary electrode 114 , to control the turning (or tilt) of the liquid crystal in the dielectric layer 116 . In this embodiment, the thickness of the dielectric layer 116 is, for example, less than 6 microns. In this embodiment, the process of forming the liquid crystal layer in the liquid crystal display panel can be used to form the dielectric layer 116 of the antenna module 100, but the embodiment of the present invention is not limited to this.

The resonant frequency of the antenna module 100 can be changed by changing the tilt angle of the liquid crystal. In this way, compared with the conventional antenna module without liquid crystal, the antenna module 100 of the embodiment of the present invention does not need a radio frequency switch (RF switch).

As shown in FIG. 1B , in the embodiment, the antenna module 100 only needs one feed line 130 to connect the first antenna 110 and the second antenna 120 . The high-frequency electromagnetic signal will form an electric field and a magnetic field in the dielectric layer 116 between the feeding line 130 and the second electrode 112 , so as to transmit the signal of the antenna module 100 . The feeding line 130 includes a single straight segment 131 and a transmission segment 132 , the first end 131A of the single straight segment 131 and the auxiliary power of the first antenna 110 . The poles 114 overlap, and the second end 131B of the single straight segment 131 overlaps the auxiliary electrode 114 of the second antenna 120 . The transmission segment 132 is connected to a single linear segment 131, and the transmission segment 132 and the single linear segment 131 may be collinear, but may also intersect (ie, not collinear).

Please refer to FIG. 2 , which shows the relationship between the frequency and the far field radiation energy and the relationship between the frequency and the Axial Ratio of the antenna module 100 in FIG. 1A according to the simulation results. The curve in FIG. 2 is drawn according to the radiation signal of the antenna module 100 viewed along the -Z axis.

As shown in FIG. 2 , in the relationship between the frequency and the far-field radiation energy, the curves C11 to C14 respectively represent different tilt angles of the liquid crystal in the dielectric layer 116 . It can be seen from the curves C11-C14 that different liquid crystal tilt angles can change the frequency of the antenna module 100 (frequency offset control), for example, the resonance frequency can be controlled between 13.5GHz and 14.2GHz, so that the technical effect of multi-frequency division of labor can be achieved. Of course, the frequency offset range may be determined by the actual structure of the antenna module 100 and is not limited by the aforementioned range. In the relationship between the frequency and the axial ratio, the curves C21~C24 correspond to the curves C11~C14 respectively. It can be seen from the curves C21-C24 that the axial ratio of the antenna module 100 in the frequency offset range (roughly the point corresponding to the resonant frequency) is less than 15dB (the smaller the axial ratio, the higher the degree of circular polarization), which shows that the antenna module 100 Circularly polarized wireless signals can be coupled out.

Please refer to FIG. 3 , which shows a top view of an antenna module 100 ′ according to another embodiment of the present invention. The antenna module 100 ′ includes a plurality of first antennas 110 , a plurality of second antennas 120 and at least one feeding line 130 (not shown in FIG. 3 ). A first antenna 110 and a second antenna 120 form an antenna unit 10a, which is located in the area formed by the length _LX and the length _LY . This area is, for example, a polygon, such as a rectangle or a square. Since the length of each side of this area is less than 1 air wavelength λ, the distance S1 between the two adjacent antenna elements 10a can be smaller than 1 air wavelength λ, so that the main lobe of the radiation pattern of the antenna module 100 ′ is compared with the secondary antenna element 100 ′. The lobes are more obvious, and the characteristics and/or positions of the main lobes can be better resolved in application. In addition, although not shown, in this embodiment, one feeding line 130 can be connected in series with the first antenna 110 and the second antenna 120 of at least some of all the antenna units 10a.

Please refer to FIGS. 4A and 4B. FIG. 4A shows a top view of the antenna module 200 according to another embodiment of the present invention, and FIG. 4B shows a back view of the antenna module 200 of FIG. 4A.

The antenna module 200 includes a first antenna 110 , a second antenna 120 and a feeding line 230 . The first antenna 110 and the second antenna 120 are vertically disposed (for example, the included angle A1 between the first antenna 110 and the second antenna 120 is approximately 90 degrees). The feeding line 230 connects the first antenna 110 and the second antenna 120 in series. The first antenna 110 and the second antenna 120 respectively excite two linearly polarized signals perpendicular to each other, and the two linearly polarized signals arranged perpendicular to each other have a phase difference of 90 degrees, which can be coupled to form a circularly polarized wireless signal. In other words, the antenna module 200 of the embodiment of the present invention can be used as a circularly polarized polarized antenna module, which is suitable for satellite signal transmission.

The antenna module 200 has the same or similar features as the antenna module 100, and the difference is that the first antenna 110 of the antenna module 200 is parallel or perpendicular to one side of the region R1. The extension manner and/or structure of the feeding line 230 can be designed according to the configuration of the first antenna 110 and the second antenna 120 . For example, in this embodiment, the feeding line 230 includes the first straight line segment 231 and the transmission segment 132 . The first end 231A of the single linear segment 231 overlaps with the auxiliary electrode 114 of the first antenna 110 , and the second end 231B of the single linear segment 231 overlaps with the auxiliary electrode 114 of the second antenna 120 . The transmission segment 132 is connected to a single straight line segment 231. The transmission segment 132 and the single straight line segment 231 may be collinear, but may also intersect (ie, not collinear).

In this embodiment, the extending direction of the first antenna 110 is, for example, parallel to one side of the region R1. In another embodiment, the extending direction of the first antenna 110 and one side of the region R1 may form an acute angle.

In this embodiment, the included angle A2 of the first antenna 110 relative to the X axis is, for example, 90 degrees, the shortest distance H1 may be between 0.2λ˜0.3λ, and the longest distance H1 may be between 0.7λ˜0.8λ . In this way, the phase difference between the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be approximately 90 degrees. However, as long as the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 is less than one air wavelength λ, the embodiment of the present invention does not limit the specific value of the distance H1.

As shown in FIG. 4A , the first antenna 110 and the second antenna 120 may be located in a region R1 , and the side length of the region R1 is less than one air wavelength λ. In other words, due to the linear antenna structure design of the embodiment of the present invention, the first antenna 110 and the second antenna 120 can be arranged in a small area R1. The X-axis of the drawing may be parallel to one side of the region R1, and the Y-axis may be parallel to the adjacent side of the region R1. The first antenna 110 and/or the second antenna 120 may be located at any position in the region R1, which is not limited in the embodiment of the present invention.

As shown in FIG. 4A , the distribution length L _X of the first antenna 110 and the second antenna 120 along the X axis is, for example, less than 0.45λ, and the distance between the first antenna 110 and the second antenna 120 along the Y axis The distribution length L _Y is, for example, less than 0.45λ, wherein the distribution lengths L _X and L _Y are regarded as the overall size of the antenna module. The embodiments of the present invention do not limit the values of the distribution lengths L _X and L _Y , as long as the distribution lengths L _X and L _Y are less than one air wavelength λ (for example, located in the region R1 ), the embodiments of the present invention do not limit the distribution length L Specific values of _X and _LY .

In a simulation result, the ratio of the left circular polarization to the right circular polarization of the antenna module 200 is approximately 200:1 (LHCP:RHCP=1000:1), it can be seen that the antenna module 200 can couple out the circular polarization Polarized wireless signal. According to the simulation results, the antenna module 200 has a similar relationship between the frequency and the far-field radiated energy, the relationship between the frequency and the axial ratio (as shown in FIG. 2 ) and the corresponding technical effects of the antenna module 100 , which will not be repeated here. .

Please refer to FIG. 5 , which shows a rear view of an antenna module 300 according to another embodiment of the present invention.

The antenna module 300 includes a first antenna 110 , a second antenna 120 and a feeding line 330 . The first antenna 110 and the second antenna 120 are vertically disposed (for example, the included angle A1 between the first antenna 110 and the second antenna 120 is approximately 90 degrees). The feeding line 330 connects the first antenna 110 and the second antenna 120 in series. The first antenna 110 and the second antenna 120 respectively excite two linearly polarized signals perpendicular to each other, and the two linearly polarized signals arranged perpendicular to each other have a phase difference of 90 degrees, which can be coupled to form a circularly polarized wireless signal. In other words, the antenna module 300 of the embodiment of the present invention can be used as a circularly polarized polarized antenna module, which is suitable for satellite signal transmission.

The antenna module 300 has the same or similar features as the antenna module 200 , except that the structure of the feed line 330 of the antenna module 300 is different from the structure of the feed line 230 of the antenna module 200 . For example, the feeding line 330 includes a first straight section 331 , a transmission section 132 , a second straight section 333 and a third straight section 334 . The first straight section 331 extends from the first antenna 110 along the first direction D1 to the third straight section 334 The first end 334A, the second straight section 333 extends from the second antenna 120 along the second direction D2 to the second end 334B of the third straight section 334, the first direction D1 is different from the second direction D2, and the third straight line The extending direction D3 of the segment 334 is different from the first direction D1 and the second direction D2.

In this embodiment, the first direction D1 is, for example, parallel to the X-axis, and the second direction D2 is, for example, parallel to the Y-axis, and the extending direction D3 of the third straight segment 334 is, for example, intersecting the first direction D1 and the first direction D1. The two directions D2, however, the embodiment of the present invention is not limited to this. In another embodiment, the first direction D1 and the X axis may form an angle not equal to 0 or 180 degrees, and the second direction D2 and the Y axis may form an angle not equal to 0 or 180 degrees.

As shown in FIG. 5 , the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 can allow the linearly polarized signal excited by the first antenna 110 to communicate with the second antenna. The phase difference of the linearly polarized signal excited by 120 is approximately 90 degrees. In this way, the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be coupled to form a circularly polarized wireless signal. The embodiment of the present invention does not limit the value of the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 , which may be determined by the included angle A2 of the first antenna 110 relative to the X-axis.

As shown in FIG. 5, in this embodiment, the included angle A2 of the first antenna 110 relative to the X axis is, for example, 90 degrees, the shortest distance H1 can be between 0.2λ˜0.3λ, and the longest distance H1 can be between Between 0.7λ and 0.8λ, where λ is the air wavelength. In this way, the phase difference between the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be approximately 90 degrees. However, as long as the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 is less than one air wavelength λ, the embodiment of the present invention does not limit the specific value of the distance H1.

As shown in FIG. 5 , the first antenna 110 and the second antenna 120 may be located in a region R1 , and the side length of the region R1 is less than one air wavelength λ. In other words, since the present invention The linear antenna structure design of the embodiment can allow the first antenna 110 and the second antenna 120 to be arranged in a small area R1. The X-axis of the drawing may be parallel to one side of the region R1, and the Y-axis may be parallel to the adjacent side of the region R1. The first antenna 110 and/or the second antenna 120 may be located at any position in the region R1, which is not limited in the embodiment of the present invention.

As shown in FIG. 5 , the distribution length L _X of the first antenna 110 and the second antenna 120 along the X axis is, for example, less than 0.42λ, and the distance between the first antenna 110 and the second antenna 120 along the Y axis The distribution length L _Y is, for example, less than 0.42λ, wherein the distribution lengths L _X and L _Y are regarded as the overall size of the antenna module. The embodiments of the present invention do not limit the values of the distribution lengths L _X and L _Y , as long as the distribution lengths L _X and L _Y are less than one air wavelength λ (for example, located in the region R1 ), the embodiments of the present invention do not limit the distribution length L Specific values of _X and _LY .

In a simulation result, the ratio of left circular polarization (LHCP) to right circular polarization (RHCP) of the antenna module 100 is approximately 275:1 (LHCP:RHCP=275:1), it can be seen that the antenna module 100 The circularly polarized wireless signal can be coupled out (the greater the ratio of LHCP and RHCP, the higher the degree of circularly polarized polarization). According to the simulation results, the antenna module 300 has a similar relationship between the frequency and the far-field radiated energy, the relationship between the frequency and the axial ratio (as shown in FIG. 2 ) and the corresponding technical effects of the antenna module 100 , which will not be repeated here. .

Please refer to FIG. 6 , which shows a rear view of an antenna module 400 according to another embodiment of the present invention.

The antenna module 400 includes a first antenna 110 , a second antenna 120 and a feeding line 430 . The first antenna 110 and the second antenna 120 are vertically disposed (for example, the included angle A1 between the first antenna 110 and the second antenna 120 is approximately 90 degrees). The feeding line 430 connects the first antenna 110 and the second antenna 120 in series. The first antenna 110 and the second antenna 120 are excited respectively Two linearly polarized signals perpendicular to each other are output, and the two linearly polarized signals arranged perpendicular to each other have a phase difference of 90 degrees, which can be coupled to form a circularly polarized wireless signal. In other words, the antenna module 400 of the embodiment of the present invention can be used as a circularly polarized polarized antenna module, which is suitable for satellite signal transmission.

The antenna module 400 has the same or similar features as the antenna module 200 , except that the structure of the feed line 430 of the antenna module 400 is different from that of the feed line 230 of the antenna module 200 . For example, for example, the feeding line 430 includes a first straight section 431 , a transmission section 132 and a second straight section 433 , the first straight section 431 extends from the first antenna 110 along the first direction D1 to the second straight section 433 , and the second straight section 433 It extends from the second antenna 120 to the first straight line segment 431 along the second direction D2, and the first direction D1 is different from the second direction D2.

As shown in FIG. 6 , the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 allows the linearly polarized signal excited by the first antenna 110 to communicate with the second antenna. The phase difference of the linearly polarized signal excited by 120 is approximately 90 degrees. In this way, the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be coupled to form a circularly polarized wireless signal. The embodiment of the present invention does not limit the value of the distance H1 between the auxiliary electrode 114 of the first antenna 110 and the auxiliary electrode 114 of the second antenna 120 , which may be determined by the included angle A2 of the first antenna 110 relative to the X-axis.

As shown in FIG. 6 , in this embodiment, the included angle A2 of the first antenna 110 relative to the X-axis is, for example, 90 degrees, the shortest distance H1 can be between 0.2λ˜0.3λ, and the longest distance H1 can be between Between 0.7λ and 0.8λ, where λ is the air wavelength. In this way, the phase difference between the linearly polarized signal excited by the first antenna 110 and the linearly polarized signal excited by the second antenna 120 can be approximately 90 degrees. However, as long as the auxiliary power of the first antenna 110 The distance H1 between the pole 114 and the auxiliary electrode 114 of the second antenna 120 may be less than one air wavelength λ, and the embodiment of the present invention does not limit the specific value of the distance H1.

As shown in FIG. 6 , the first antenna 110 and the second antenna 120 may be located in a region R1 , and the side length of the region R1 is less than one air wavelength λ. In other words, due to the linear antenna structure design of the embodiment of the present invention, the first antenna 110 and the second antenna 120 can be arranged in a small area R1. The X-axis of the drawing may be parallel to one side of the region R1, and the Y-axis may be parallel to the adjacent side of the region R1. The first antenna 110 and/or the second antenna 120 may be located at any position in the region R1, which is not limited in the embodiment of the present invention.

As shown in FIG. 6 , the distribution length L _X of the first antenna 110 and the second antenna 120 along the X-axis is, for example, less than 0.4λ, and the distance between the first antenna 110 and the second antenna 120 along the Y-axis is, for example, less than 0.4λ. The distribution length L _Y is, for example, less than 0.4λ, wherein the distribution lengths L _X and L _Y are regarded as the overall size of the antenna module. The embodiments of the present invention do not limit the values of the distribution lengths L _X and L _Y , as long as the distribution lengths L _X and L _Y are less than one air wavelength λ (for example, located in the region R1 ), the embodiments of the present invention do not limit the distribution length L Specific values of _X and _LY .

In a simulation result, the ratio of left circular polarization (LHCP) to right circular polarization (RHCP) of the antenna module 100 is approximately 10:1 (LHCP:RHCP=10:1), it can be seen that the antenna module 100 The circularly polarized wireless signal can be coupled out (the greater the ratio of LHCP and RHCP, the higher the degree of circularly polarized polarization). According to the simulation results, the antenna module 400 has the relationship between the frequency and the far-field radiated energy, the relationship between the frequency and the axial ratio (as shown in FIG. 2 ), and the corresponding technical effect similar to the antenna module 100 , which will not be repeated here. .

At least one of all the antenna units 10a of the antenna module 100' in FIG. 3 can be replaced by the structure of at least one of the antenna modules 200-400 (structures in the regions of distribution length _LX and _LY ). The antenna units 10a of the antenna module 100' can be formed by arranging at least one of the aforementioned antenna modules 100-400, that is, the antenna module 100' can be mixed with at least one of the antenna modules 100-400.

The aforementioned antenna modules 100 to 400 do not limit the numerical range of the included angle A2. The included angle A2 may be 30 degrees, 45 degrees (eg, the antenna module 100), 60 degrees, or 90 degrees (eg, the antenna modules 200-400), or any other real number between 0-90 degrees. The radiation direction of the antenna module and the linear polarization direction of the antenna can be changed according to the included angle A2, but the change of the included angle A2 has little effect on the resonant frequency range of the antenna module. Please refer to the following instructions.

Please refer to FIG. 7 , which is a graph showing the correlation between the frequency and the radiated energy of the antenna module under different included angles A2 according to an embodiment of the present invention. It can be seen from the figure that the change of the included angle A2 has little effect on the bandwidth range of the antenna module. In detail, for the antenna module (curve C31 ) whose included angle A2 is 0 degrees, the antenna module (curve C32 ) whose included angle A2 is 30 degrees, the antenna module whose included angle A2 is 45 degrees (curve C33 ), and the included angle A2 are: For the 60-degree antenna module (curve C34), its bandwidth varies within a small range of 13.6GHz to 13.9GHz. It can be seen that the change of the included angle A2 has little effect on the bandwidth variation of the antenna module (that is, the antenna mode The bandwidth of the group is not sensitive to changes in the included angle A2). In this way, even if the numerical design of the included angle A2 is changed according to the actual situation, it will not change or excessively change the working frequency bandwidth of the antenna module. This feature enables the antenna module to maintain bandwidth stability under different angles A2, which can increase the design flexibility of the antenna module.

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those skilled in the art to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the appended patent application.

110: The first antenna

112: The first electrode

113a: Through hole

114: auxiliary electrode

115: Second substrate

120: The second antenna

A1, A2: included angle

H1: Distance

L _X ,L _Y : length

R1: Region

Claims (19)

An antenna module, comprising: a first antenna; a second antenna; and a feed line, electrically connecting the first antenna and the second antenna; wherein, the first antenna and the second antenna Any one of the antennas includes: a first substrate having an opposite first surface and a second surface; a first electrode located on the second surface of the first substrate and overlapping the feeding line, wherein The first electrode is annular; a second electrode has a through hole, and the through hole overlaps with the first electrode; and an auxiliary electrode is located in the through hole and partially overlaps with the first electrode; wherein, the feed The incoming wire is arranged on the first surface of the first substrate, and the first antenna and the second antenna are arranged vertically. The antenna module of claim 1, wherein the feed line is connected in series with the first antenna and the second antenna. The antenna module of claim 1, wherein the first antenna and the second antenna are substantially vertically disposed on the same plane. The antenna module of claim 1, wherein the distance between the auxiliary electrode of the first antenna and the auxiliary electrode of the second antenna is less than 1 air wavelength. The antenna module of claim 1, wherein the first antenna and the second antenna are located in a square area, and the side length of the square area is less than one air wavelength. The antenna module of claim 1, wherein the feeding line comprises a single straight line segment, a first end of the single straight line segment overlaps with the auxiliary electrode of the first antenna, and a first end of the single straight line segment is overlapped with the auxiliary electrode of the first antenna. The two ends overlap with the auxiliary electrode of the second antenna. The antenna module of claim 1, wherein the feed line comprises a first straight line segment and a second straight line segment, the first straight line segment extends from the first antenna along a first direction to the second straight line segment, The second straight line segment extends from the second antenna to the first straight line segment along a second direction, and the first direction is different from the second direction. The antenna module of claim 1, wherein the feed line comprises a first straight line segment, a second straight line segment and a third straight line segment, the first straight line segment extending from the first antenna along a first direction to A first end of the third straight line segment, the second straight line segment extends from the second antenna along a second direction to a second end of the third straight line segment, the first direction is opposite to the second direction and the extending direction of the third straight line segment is different from the first direction and the second direction. The antenna module of claim 1, wherein the first antenna and the second antenna are located in a square area, and the first antenna is parallel or perpendicular to one side of the square area. The antenna module of claim 1, wherein the first antenna and the second antenna are located in a square area, and an acute angle is formed between the first antenna and one side of the square area. The antenna module of claim 1, wherein the first antenna and the second antenna are arranged coplanarly. An antenna module, comprising: a first antenna; a second antenna, arranged vertically with the first antenna; and a feed line, connecting the first antenna and the second antenna in series; wherein the first antenna The distance between an auxiliary electrode of the antenna and an auxiliary electrode of the second antenna is less than 1 air wavelength; wherein, any one of the first antenna and the second antenna further comprises: an electrode, the electrode has a through hole; and the auxiliary electrode, located in the through hole. The antenna module of claim 12, wherein the first antenna and the second antenna are located in a square area, and the side length of the square area is less than one air wavelength. The antenna module of claim 12, wherein the feed line comprises a single straight line segment, a first end of the single straight line segment overlaps with the auxiliary electrode of the first antenna, and a first end of the single straight line segment The two ends overlap with the auxiliary electrode of the second antenna. The antenna module of claim 12, wherein the feed line comprises a first straight line segment and a second straight line segment, the first straight line segment extends from the first antenna along a first direction to the second straight line segment, The second straight line segment extends from the second antenna to the first straight line segment along a second direction, and the first direction is different from the second direction. The antenna module of claim 12, wherein the feed line includes a first straight line segment, a second straight line segment and a third straight line segment, the first straight line segment extending from the first antenna along a first direction to A first end of the third straight line segment, the second straight line segment extends from the second antenna along a second direction to a second end of the third straight line segment, the first direction is opposite to the second direction and the extending direction of the third straight line segment is different from the first direction and the second direction. The antenna module of claim 12, wherein the first antenna and the second antenna are located in a square area, and the first antenna is parallel or perpendicular to one side of the square area. The antenna module of claim 12, wherein the first antenna and the second antenna are located in a square area, and an acute angle is formed between the first antenna and one side of the square area. The antenna module of claim 12, wherein the first antenna and the second antenna are arranged coplanarly.

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