TWI852290B - 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 a multi-level array

The present invention relates to an antenna device, in particular to an antenna device having a main coil and a sub-coil and having a multi-stage array that can be used in one-dimensional space and multi-dimensional space.

In the field of antenna-related engineering, loop antennas are a common type of antenna. A loop antenna may include a coil structure for receiving wireless signals and generating corresponding signals by induction, thereby transmitting the generated signals to an external circuit through a conductive path. A loop antenna may also receive signals from an external circuit and generate corresponding wireless signals by induction, thereby transmitting wirelessly. Loop antennas are used in many scenarios. For example, a loop antenna may be provided in a near field communication (NFC) device to send and receive signals.

Although the ring antenna is already available in the industry, there are still some practical problems that are difficult to deal with. When using a ring antenna, the effective area and effective height corresponding to the antenna pattern are not easy to increase, so it is difficult to improve the effectiveness of signal reception and transmission.

The embodiment provides an antenna device, comprising 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 electrically connected to the first feed point through a first terminal, wherein the main coil corresponds to a main area. The 1st sub-coil to the nth sub-coil respectively correspond to a 1st sub-region to an nth sub-region, the 1st sub-region to the nth sub-region are located in the main region, an i-th sub-coil corresponds to an i-th sub-region, an (i+1)th sub-coil corresponds 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 second feed point through a second end point. A winding direction of the main coil is the same as a winding direction of each of the 1st sub-coil to the nth sub-coil.

100: Antenna device

105: Processing circuit

110: First feedback point

120: Second feedback point

150: Main coil

150A: Main area

150A1: Part 1

150A2: Part 2

150A3: Part 3

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

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

710,720,730: Neck part

d1,d2: winding direction

N1: First endpoint

N2: Second endpoint

P1: First plane

P2: Second plane

P3: The third plane

S1: First signal

S2: Second signal

SR,ST: Wireless signal

W1: First width

W2: Second width

W3: Third width

X,Y,Z: reference axis

θ: angle of intersection

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

Figure 2 is a schematic diagram of Figure 1 where n is equal to 3 and the sub-areas are located on the same plane.

Figure 3 is a schematic diagram showing multiple sub-regions located on two planes in an embodiment.

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

Figure 5 is a schematic diagram of an embodiment in which a plurality of sub-coils are located in three planes to have a three-dimensional structure.

Figure 6 is a schematic diagram showing an embodiment in which the main area has another shape.

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

In this article, if "substantially" is used for description, it means that 90% to 110% of the numerical value or range described can fall within the scope of the embodiment. For example, if the specification states that a numerical value can be substantially 100, then when the numerical value is between 90 and 110, it falls within the scope of the embodiment. In this article, if a group of objects is mentioned, the group of objects may include one object or multiple 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 nth sub-coil 15n. The first feed point 110 may be used to receive or transmit a first signal S1, and the second feed point 120 may be used to receive or transmit a second signal S2. In FIG. 1, the first feed point 110 transmits a first signal S1, and the second feed point 120 receives a second signal S2, for example. As shown in FIG. 1, the first feed point 110 and the second feed point 120 may be coupled to the processing circuit 105, and the processing circuit 105 may be used to generate a first signal S1, and receive and process a second signal S2.

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

In the 1st 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-region 15(i+1)A. Here, i and n are integers, and 0<i<n. The 1st sub-region 151A to the nth sub-region 15nA may be located within the main region 150A. The i-th sub-coil 15i may be 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 1st sub-coil 151 to the nth sub-coil 15n. In FIG. 1, the winding directions d1 and d2 are taken as counterclockwise directions, 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 current direction on the main coil 150 can be the same as the current direction on each of the first sub-coil 151 to the nth sub-coil 15n. Thus, when the current flow directions of two adjacent coils are in the same direction, a better signal transmission and reception effect 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 other of the first signal S1 and the second signal 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-area 151A to the nth sub-area 15nA may be located in the same plane. FIG. 2 is a schematic diagram of FIG. 1 in which n is equal to 3 and the sub-areas are located in the same plane. As shown in FIG. 2, the first sub-area 151A to the third sub-area 153A may be located in the same plane, that is, the plane defined by the reference axis X and the reference axis Y.

In other embodiments, in the first sub-region 151A to the nth sub-region 15nA, the first group of sub-regions may be located in the first plane, and the second group of sub-regions may be located in the second plane. According to the 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 in two planes in an embodiment. In FIG. 3, n=3 is taken as an example. In FIG. 3, the first sub-region 151A and the second sub-region 152A are located in the first plane P1, and the third sub-region 153A is located in 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 three-dimensional space by 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 at multiple angles.

According to the embodiment, in the first sub-area 151A to the nth sub-area 15nA corresponding to the first sub-coil 151 to the nth sub-coil 15n, the i-th sub-area 15i may be adjacent to the (i+1)-th sub-area. FIG. 4 is a schematic diagram of the antenna device 100 including four sub-areas in the embodiment. Among them, the first sub-area 151A and the second sub-area 152A may be adjacent, and the third sub-area 153A and the fourth sub-area 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-regions 151A to the nth sub-regions 15nA corresponding to the first sub-coil 151 to the nth sub-coil 15n, respectively, the first group of sub-regions may be located on a first plane, the second group of sub-regions may be located on a second plane, and the third group of sub-regions may be 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 (i.e., 3

n), the plurality of sub-regions corresponding to the plurality of sub-coils may be located in three planes respectively. FIG. 5 is a schematic diagram of an embodiment in which the plurality of sub-coils are located in three planes to have a three-dimensional structure. As shown in FIG. 5, the first sub-region 151A, the second sub-region 152A and the third sub-region 153A may be located in 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 may be defined in three-dimensional space by reference axes X, Y and Z. 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 showing another shape of the main region 150A in an embodiment. As shown in FIG. 6 , the main region 150A may include a first portion 150A1, a second portion 150A2, and a third portion 150A3. The second portion 150A2 may be 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 represented as W1

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 ease of description, the narrower portion of the main coil 150 (e.g., the second portion 150A2) may be referred to as a neck portion.

According to the 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 of Figure 6, the number of sub-coils located in the first part 150A1 is 2, and the number of another sub-coil located in the third part 150A3 is 1. This is only an example and is not intended to limit the scope of the embodiment. The user can adjust the number of sub-coils in each part of the main area 150A according to needs.

By using the structure of FIG. 6, when the antenna device 100 is bent, the neck portion can be bent to reduce the probability of the coil breaking. For example, after the antenna device 100 of FIG. 6 is bent, the first portion 150A1 can be located on the first plane, the third portion 150A3 can be located on the second plane, a portion of the second portion 150A2 (i.e., the neck portion) can be located on the first plane, and another portion of the second portion 150A2 can be located on the second plane.

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

By using the antenna device 100 provided in the embodiment, the range of the antenna magnetic field distribution 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 mm, while the antenna magnetic field distribution of the antenna device 100 in FIG. 2 can have a range of about 34 mm, so the improvement can be greater than 6%.

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

In summary, the antenna device provided by the embodiment can effectively improve the effective area and effective height corresponding to the antenna pattern. The multiple sub-coils of the antenna device can correspond to multiple levels of arrays, so the antenna device of the embodiment can be used in one-dimensional space and/or multi-dimensional space and has a multi-level array. Therefore, the antenna device provided by the embodiment is helpful for dealing with related problems of antenna-related applications, such as improving the antenna performance of near field communication (NFC).

The above is only the preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

100: Antenna device

105: Processing circuit

110: First feedback point

120: Second feedback point

150: Main coil

150A: Main area

151A to 15nA, 152A, 15iA, 15(i+1)A: sub-area

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

d1,d2: winding direction

N1: First endpoint

N2: Second endpoint

S1: First signal

S2: Second signal

SR,ST: Wireless signal

X,Y,Z: reference axis

Claims (9)

An antenna device comprises: 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 electrically connected to the first feed point via a first end point, wherein the main coil corresponds to a main region; and a first sub-coil to an nth sub-coil, wherein the first sub-coil to the nth sub-coil respectively correspond to a first sub-region to an nth sub-region, the first sub-region to the nth sub-region are located in the main region, an i-th sub-coil corresponds to an i-th sub-region, an (i+1)th sub-coil corresponds to an (i+1)th sub-region, and an (i+1)th sub-coil corresponds to an (i+1)th sub-region. region, the i-th sub-coil is electrically connected to the (i+1)-th sub-coil and the main coil, the n-th sub-coil is electrically connected to the second feed point via a second end 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; wherein the antenna device is used to transmit a first wireless signal and receive a second wireless signal, the first wireless signal is generated according to one of the first signal and the second signal, and the other of the first signal and the second signal is generated according to the second wireless signal. The antenna device as described in claim 1, wherein the first sub-area to the nth sub-area are located in the same plane. An antenna device includes: 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 electrically connected to the first feed point via a first end point, wherein the main coil corresponds to a main region; and a first sub-coil to an nth sub-coil, wherein the first sub-coil to the nth sub-coil respectively correspond to a first sub-region to an nth sub-region, the first sub-region to the nth sub-region are located in the main region, an i-th sub-coil corresponds to an i-th sub-region, and an (i+1)th sub-coil corresponds to an (i+1)th sub-coil. The coil corresponds 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, the n-th sub-coil is electrically connected to the second feed point through a second end point, a winding direction of the main coil is the same as a winding direction of each of the 1st to the nth sub-coil, i and n are integers, and 0<i<n; wherein in the 1st to the nth sub-region, a first group of sub-regions is located in a first plane, a second group of sub-regions is located in a second plane, and the first plane is substantially perpendicular to the second plane. An antenna device comprises: 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 electrically connected to the first feed point via a first end point, wherein the main coil corresponds to a main region; and a first sub-coil to an nth sub-coil, wherein the first sub-coil to the nth sub-coil respectively correspond to a first sub-region to an nth sub-region, the first sub-region to the nth sub-region are located in the main region, an i-th sub-coil corresponds to an i-th sub-region, and an (i+1)th sub-coil corresponds to 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, the n-th sub-coil is electrically connected to the second feed point through a second end point, a winding direction of the main coil is the same as a winding direction of each of the 1st to the nth sub-coil, i and n are integers, and 0<i<n; wherein in the 1st to the nth sub-region, a first group of sub-regions is located in a first plane, a second group of sub-regions is located in a second plane, and the first plane is substantially not perpendicular to the second plane. An antenna device comprises: 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 electrically connected to the first feed point via a first end point, wherein the main coil corresponds to a main region; and a first sub-coil to an nth sub-coil, wherein the first sub-coil to the nth sub-coil respectively correspond to a first sub-region to an nth sub-region, the first sub-region to the nth sub-region are located in the main region, an i-th sub-coil corresponds to an i-th sub-region, an (i+1)th sub-coil corresponds to an (i+1)th sub-region, and , the i-th sub-coil is electrically connected to the (i+1)-th sub-coil and the main coil, the n-th sub-coil is electrically connected to the second feed point through a second end point, a winding direction of the main coil is the same as a winding direction of each of the 1st to the n-th sub-coil, i and n are integers, and 0<i<n; wherein in the 1st to the n-th sub-regions, a first group of sub-regions is located in a first plane, a second group of sub-regions is located in a second plane, and a third group of sub-regions is located in a third plane, wherein any two of the first plane, the second plane and the third plane are not coplanar. An antenna device comprises: 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 electrically connected to the first feed point via a first end point, wherein the main coil corresponds to a main region; and a first sub-coil to an nth sub-coil, wherein the first sub-coil to the nth sub-coil respectively correspond to a first sub-region to an nth sub-region, the first sub-region to the nth sub-region are located in the main region, an i-th sub-coil corresponds to an i-th sub-region, an (i+1)th sub-coil corresponds to an (i+1)th sub-region, the i-th The sub-coil is electrically connected to the (i+1)th sub-coil and the main coil, the nth sub-coil is electrically connected to the second feed point through a second end point, a winding direction of the main coil is the same as a winding direction of each of the first to nth sub-coils, i and n are integers, and 0<i<n; 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; a first width of the first part is greater than or equal to a second width of the second part; and a third width of the third part is greater than or equal to the second width of the second part. The antenna device as described in claim 6, wherein: the first portion is located in a first plane; the third portion is located in a second plane; and a portion of the second portion is located in the first plane, and another portion of the second portion is located in the second plane. The antenna device as described in claim 6, 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 1. The antenna device as described 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 nth sub-coil.

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