TWM642884U - Antenna device with multi-level array that can be used in one-dimensional space and multi-dimensional space - Google Patents

Abstract

An antenna device includes a first feed point, a second feed point, a main coil, and a first sub-coil to an nth sub-coil. The first feed point is used to receive or transmit a first signal. The second feed point is used to receive or transmit a second signal. The main coil is corresponding to a main area. The first sub-coil to the nth sub-coil are respectively corresponding a first sub-area to an nth sub-area. The first sub-area to the nth sub-area are in the main area. The main coil is electrically connected to the first sub-coil to the nth sub-coil, the first feed point and the second feed point. A winding direction of the main coil is the same as a winding direction of each of the first sub-coil to the nth sub-coil.

Description

Antenna device that can be used in one-dimensional space and multi-dimensional space and has multi-level array

The invention relates to an antenna device, especially an antenna device with a multi-level array that includes a main coil and a sub-coil, and can be used in one-dimensional space and multi-dimensional space.

In the field of antenna related engineering, the loop antenna (loop antenna) is a common type of antenna. The loop antenna may include a coil structure for receiving wireless signals and inductively generating corresponding signals, so as to transmit the generated signals to external circuits through conductive paths. The loop antenna can also receive signals from external circuits and generate corresponding wireless signals in an inductive manner for wireless transmission. The application of loop antennas can be seen in a variety of contexts. For example, in a near field communication (NFC) device, a loop antenna may be provided for sending and receiving signals.

Although the loop antenna has been used in the industry, there are still difficult problems in practice. When a loop antenna is used, the effective area and effective height corresponding to the antenna pattern are not easy to increase, so it is difficult to improve the effect of signal transmission and reception.

The embodiment provides an antenna device, which includes a first feed point, a second feed point, a main coil, and a first sub-coil to an nth sub-coil. The first feeding point is used for receiving or transmitting a first signal. The second feeding point is used for receiving or transmitting a second signal. The main coil is electrically connected to the first feeding point through a first terminal, wherein the main coil corresponds to a main area. The first sub-coil to the nth sub-coil respectively correspond to a first sub-region to an n-th sub-region, and the first sub-region to the n-th sub-region are In the main area, an i-th sub-coil corresponds to an i-th sub-area, an (i+1)-th sub-coil corresponds to an (i+1)-th sub-area, and the i-th sub-coil is electrically connected to the The (i+1)th sub-coil and the main coil, the nth sub-coil are electrically connected to the second feeding point through a second terminal. A winding direction of the main coil is the same as a winding direction of each of the first sub-coil to the nth sub-coil.

100: Antenna device

105: Processing circuit

110: The first feed contact

120: The second feed point

150: main coil

150A: Main area

150A1: Part I

150A2: Part Two

150A3: Part Three

151A to 15nA, 152A, 153A, 154A, 15iA, 15(i+1)A: subregions

151 to 15n, 152, 153, 154, 15i, 15(i+1): sub-coils

710,720,730: neck part

d1, d2: winding direction

N1: first endpoint

N2: second endpoint

P1: first plane

P2: second plane

P3: third plane

S1: The first signal

S2: Second signal

SR, ST: wireless signal

W1: first width

W2: second width

W3: third width

X, Y, Z: reference axis

θ: included angle

FIG. 1 is a schematic diagram of an antenna device coupled to a processing circuit in an embodiment.

Figure 2 is a schematic diagram in which n is equal to 3 in Figure 1 and the sub-regions are located on the same plane.

FIG. 3 is a schematic diagram of a plurality of sub-regions located on two planes in the embodiment.

FIG. 4 is a schematic diagram of an antenna device including four sub-areas in an embodiment.

Fig. 5 is a schematic diagram of a plurality of sub-coils located in three planes to have a three-dimensional structure in the embodiment.

FIG. 6 is a schematic diagram of another shape of the main region in the embodiment.

FIG. 7 is a schematic diagram of another embodiment in which the antenna device having a neck portion is bent to have a three-dimensional structure.

Herein, if "substantially" is used for description, it means that 90% to 110% of the stated value or range may fall within the range of the embodiment. For example, if the specification states that a value may be substantially 100, then if the value is between 90 and 110, it falls within the scope of the embodiment. Herein, if a group of objects is mentioned, the group of objects may include one object or a plurality of objects.

FIG. 1 is a schematic diagram of an antenna device 100 coupled to a processing circuit 105 in an embodiment. The antenna device 100 may include a first feed point 110 , a second feed point 120 , a main coil 150 , and a first sub-coil 151 to an n-th sub-coil 15n. The first feed point 110 can be used to receive or transmit the first signal S1, and the second feed point 120 can be used to receive or transmit the second signal S2. In FIG. 1 , the first feed point 110 transmits the first signal S1 and the second feed point 120 receives the second signal S2 as an example for illustration. As shown in FIG. 1 , the first feed point 110 and the second feed point 120 can be coupled to the processing circuit 105 , and the processing circuit 105 can be used to generate the first signal S1 and receive and process the second signal S2 .

As shown in FIG. 1 , the main coil 150 can be electrically connected to the first feeding point 110 through the first terminal N1. The nth sub-coil 15n can be electrically connected to the second feeding point 120 through the second terminal N2. The main coil 150 may correspond to the main area 150A, and the first sub-coil 151 to the nth sub-coil 15n may respectively correspond to the first sub-area 151A to the n-th sub-area 15nA.

Among the first sub-coil 151 to the nth sub-coil 15n, the i-th sub-coil 15i may correspond to the i-th sub-region 15iA, and the (i+1)th sub-coil 15(i+1) may correspond to the (i+1)th sub-coil 15iA. ) sub-region 15(i+1)A. Here, i and n are integers, and 0<i<n. The first sub-region 151A to the n-th sub-region 15nA may be located within the main region 150A. The i-th sub-coil 15 i is electrically connected to the (i+1)-th sub-coil 15 (i+1) and the main coil 150 . The winding direction d1 of the main coil 150 may be the same as the winding direction d2 of each of the first sub-coil 151 to the n-th sub-coil 15n. In FIG. 1 , the winding directions d1 and d2 are counterclockwise as an example, but the embodiment is not limited thereto. In other embodiments, the winding direction of the main coil and the sub-coil may also be clockwise.

According to the embodiment, by controlling the winding direction, the direction of the current on the main coil 150 can be the same as the direction of the current on each of the first sub-coil 151 to the n-th sub-coil 15n. In this way, when the currents of two adjacent coils flow in the same direction, better signal sending and receiving effects can be achieved.

As shown in FIG. 1, the antenna device 100 can be used to transmit a wireless signal ST and receive a wireless signal SR. The wireless signal ST can be generated according to one of the first signal S1 and the second signal S2, and the first signal S1 and the second signal The other of the two signals S2 can be generated according to the wireless signal SR. In FIG. 1 , the wireless signal ST can be generated according to the first signal S1 , and the second signal S2 can be generated according to the wireless signal SR. This is an example, and the embodiment is not limited thereto.

In the antenna device 100, the first sub-region 151A to the n-th sub-region 15nA may be located on the same plane. noodle. Figure 2 is a schematic diagram in which n is equal to 3 in Figure 1 and the sub-regions are located on the same plane. As shown in FIG. 2 , the first sub-region 151A to the third sub-region 153A may be located on the same plane, that is, the plane defined by the reference axis X and the reference axis Y.

In other embodiments, among the first sub-region 151A to the n-th sub-region 15nA, the first group of sub-regions may be located on the first plane, and the second group of sub-regions may be located on the second plane. According to an embodiment, the first plane may be substantially perpendicular to the second plane, that is, the angle between the first plane and the second plane may be substantially 90 degrees. According to another embodiment, the first plane may not be substantially perpendicular to the second plane. FIG. 3 is a schematic diagram of a plurality of sub-regions located on two planes in the embodiment. In Figure 3, n=3 is taken as an example. In FIG. 3 , the first sub-region 151A and the second sub-region 152A are located on the first plane P1, and the third sub-region 153A is located on the second plane P2. As shown in FIG. 3 , an angle θ may be formed between the first plane P1 and the second plane P2 , and the angle θ may be substantially 90 degrees or other angles. As shown in FIG. 3 , the first plane P1 and the second plane P2 are defined in a three-dimensional space through reference axes X, Y, and Z. By bending the antenna device 100 so that the antenna device 100 has a three-dimensional structure, the antenna magnetic field strength can be generated on multiple planes to realize an omnidirectional antenna, thereby detecting signals from multiple angles.

According to an embodiment, among the first sub-region 151A to the n-th sub-region 15nA corresponding to the first sub-coil 151 to the n-th sub-coil 15n, the i-th sub-region 15i may be adjacent to the (i+1)-th sub-region. FIG. 4 is a schematic diagram of the antenna device 100 including four sub-areas in the embodiment. Wherein, the first sub-region 151A and the second sub-region 152A may be adjacent, and the third sub-region 153A and the fourth sub-region 154A may be adjacent.

n)，則複數個子線圈對應的複數個子區域可分別位於三個平面。第5圖為實施例中，複數個子線圈位於三個平面以具有三維結構之示意圖。如第5圖所示， 第1子區域151A、第2子區域152A及第3子區域153A可分別位於第一平面P1、第二平面P2及第三平面P3。第一平面P1、第二平面P2及第三平面P3可透過參考軸X、Y及Z被定義於三維空間之中。第一平面P1、第二平面P2及第三平面P3之兩者，實質上可互為垂直或不垂直。 According to another embodiment, in the first sub-region 151A to the n-th sub-region 15nA respectively corresponding to the first sub-coil 151 to the n-th sub-coil 15n, the first group of sub-regions can be located on the first plane, and the second group of sub-regions can be located on the first plane. It may be located on a second plane, and the third group of sub-regions is located on a third plane, wherein any two of the first plane, the second plane, and the third plane are not coplanar. In other words, if the number of sub-coils is 3 or more (that is, 3

n), then the plurality of sub-regions corresponding to the plurality of sub-coils can be respectively located in three planes. Fig. 5 is a schematic diagram of a plurality of sub-coils located in three planes to have a three-dimensional structure in the embodiment. As shown in FIG. 5 , the first sub-region 151A, the second sub-region 152A and the third sub-region 153A may be located on the first plane P1 , the second plane P2 and the third plane P3 respectively. The first plane P1 , the second plane P2 and the third plane P3 can be defined in a three-dimensional space through the reference axes X, Y and Z. The two of the first plane P1, the second plane P2 and the third plane P3 may be substantially perpendicular or non-perpendicular to each other.

W2)。第三部分150A3之第三寬度W3可大於等於第二部分150A2之第二寬度W2(其可表示為W3

W2)。換言之，第一部分150A1及第三部分150A3可較寬，且第二部分150A2可較窄。為了便於敘述，在此將主線圈150較窄的部分(例如，第二部分150A2)可稱為頸型部分。 FIG. 6 is a schematic diagram of another shape of the main region 150A in the embodiment. As shown in FIG. 6 , the main area 150A may include a first portion 150A1 , a second portion 150A2 and a third portion 150A3 . The second portion 150A2 may be located between the first portion 150A1 and the third portion 150A3. The first width W1 of the first portion 150A1 may be greater than or equal to the second width W2 of the second portion 150A2 (which may be expressed as W1

W2). The third width W3 of the third portion 150A3 may be greater than or equal to the second width W2 of the second portion 150A2 (which may be expressed as W3

W2). In other words, the first portion 150A1 and the third portion 150A3 may be wider, and the second portion 150A2 may be narrower. For the convenience of description, the narrower part of the main coil 150 (eg, the second part 150A2 ) may be referred to as a neck-shaped part.

According to an embodiment, the number of sub-coils located in the first part 150A1 may be greater than or equal to 1, and the number of another sub-coil located in the third part 150A3 may be greater than or equal to 1. In the example shown in FIG. 6 , the number of sub-coils located in the first part 150A1 is two, and the number of another sub-coil located in the third part 150A3 is one. This is just an example, not intended to limit the scope of the embodiment, and the user can adjust the number of sub-coils in each part of the main area 150A according to requirements.

By using the structure shown in FIG. 6, when bending the antenna device 100, the neck portion can be bent to reduce the probability of coil breakage. For example, when the antenna device 100 in FIG. 6 is bent, the first part 150A1 can be located on the first plane, the third part 150A3 can be located on the second plane, and a part of the second part 150A2 (that is, the neck part) can be is located on the first plane, and another part of the second portion 150A2 may be located on the second plane.

FIG. 7 is a schematic diagram of another embodiment in which the antenna device 100 having a neck portion is bent to have a three-dimensional structure. As shown in Figure 7, the first sub-area corresponding to the first sub-coil 151 to the third sub-coil The domain 151A to the third sub-region 153A may be located on the first plane P1 to the third plane P3 respectively. The neck portion 710 can be bent between the first plane P1 and the third plane P3, the neck portion 720 can be bent between the first plane P1 and the second plane P2, and the neck portion 730 can be bent between the first plane P1 and the third plane P3. The second plane P2 and the third plane P3 are bent. By bending the neck part, the space adaptability can be improved, so the usable area can be reduced.

By using the antenna device 100 provided by the embodiment, the distribution range of the antenna magnetic field can be increased. Taking the antenna device 100 in FIG. 2 as an example, the antenna magnetic field distribution of a conventional antenna without a sub-coil can have a range of about 32 millimeters (mm), while the antenna magnetic field distribution of the antenna device 100 in FIG. 2 can have a range of about The range of 34 mm, so the degree of improvement can be greater than 6%.

In addition, taking the antenna device 100 in FIG. 3 as an example, the antenna magnetic field distribution of a conventional antenna without a sub-coil can have a range of about 28 millimeters in the antenna magnetic field distribution on the first plane, and the antenna device 100 in FIG. 3 The distribution of the antenna magnetic field in the first plane may have a range of about 30 mm, so the degree of improvement may be greater than 7%.

To sum up, the antenna device provided by the embodiment can effectively improve the effective area and effective height corresponding to the antenna pattern. The plurality of sub-coils of the antenna device may correspond to the plurality of stage arrays, so the antenna device of the embodiment is an antenna device that can be used in one-dimensional space and/or multi-dimensional space and has a multi-stage array. Therefore, the antenna device provided by the embodiment is really helpful for solving problems related to antenna-related applications, such as improving the antenna performance of Near Field Communication (NFC).

100: Antenna device

105: Processing circuit

110: The first feed contact

120: The second feed point

150: main coil

150A: Main area

151A to 15nA, 152A, 15iA, 15(i+1)A: subregions

151 to 15n, 152, 15i, 15(i+1): sub-coils

d1, d2: winding direction

N1: first endpoint

N2: second endpoint

S1: The first signal

S2: Second signal

SR, ST: wireless signal

X, Y, Z: reference axis

Claims (10)

An antenna device, comprising: a first feed point for receiving or transmitting a first signal; a second feed point for receiving or transmitting a second signal; a main coil through a first terminal Electrically connected to the first feeding point, wherein the main coil corresponds to a main area; and a first sub-coil to an nth sub-coil, wherein the first sub-coil to the nth sub-coil respectively correspond to a The first sub-area to the nth sub-area, the first sub-area to the n-th sub-area are located in the main area, an i-th sub-coil corresponds to an i-th sub-area, and an (i+1)-th sub-coil Corresponding to an (i+1)th sub-region, the i-th sub-coil is electrically connected to the (i+1)-th sub-coil and the main coil, and the n-th sub-coil is electrically connected to the At the second feeding point, a winding direction of the main coil is the same as a winding direction of each of the first sub-coil to the n-th sub-coil, i and n are integers, and 0<i<n . The antenna device as described in claim 1, wherein: the antenna device is used to transmit a first wireless signal and receive a second wireless signal, and the first wireless signal is based on one of the first signal and the second signal and the other of the first signal and the second signal is generated based on the second wireless signal. The antenna device according to claim 1, wherein the first sub-area to the n-th sub-area are located on the same plane. The antenna device according to claim 1, wherein in the first sub-area to the nth sub-area, a first group of sub-areas is located on a first plane, a second group of sub-areas is located on a second plane, and The first plane is substantially perpendicular to the second plane. The antenna device according to claim 1, wherein in the first sub-area to the n-th sub-area, a first group of sub-areas is located on a first plane, a second group of sub-areas is located on a second plane, and the The first plane is not substantially perpendicular to the second plane. The antenna device according to claim 1, wherein: in the first sub-area to the n-th sub-area, a first group of sub-areas is located on a first plane, a second group of sub-areas is located on a second plane, and A third group of sub-regions is located on a third plane, wherein any two of the first plane, the second plane, and the third plane are not coplanar. The antenna device as claimed in claim 1, wherein: the main area includes a first part, a second part and a third part; the second part is between the first part and the third part; the first part A first width is greater than or equal to a second width of the second portion; and a third width of the third portion is greater than or equal to the second width of the second portion. The antenna device as claimed in item 7, wherein: the first part is located in a first plane; the third part is located in a second plane; and a part of the second part is located in the first plane, and the second part Another part is located on the second plane. The antenna device as claimed in claim 7, wherein: the number of sub-coils located in the first part can be greater than or equal to 1; and The number of another sub-coil located in the third part can be greater than or equal to one. The antenna device as claimed in claim 1, wherein: the direction of the current on the main coil is the same as the direction of the current on each of the first sub-coil to the n-th sub-coil.

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