CN106711588A - Dual-frequency antenna - Google Patents

Abstract

The invention discloses a dual-frequency antenna which comprises a first radiation part and a second radiation part. The first radiation portion is disposed along a first direction. One end of the first radiation part comprises a first feed-in part, and the other end of the first radiation part extends towards the second direction to form a first bending part. The second radiation portion is disposed along the first direction. One end of the second radiation part comprises a second feed-in part, and the projection of the end of the second feed-in part in the second direction is at least partially overlapped with the first radiation part. The second feed-in part is separated from the first feed-in part by a first interval, the first bending part is separated from the second radiation part by a second interval, and the first interval is not equal to the second interval.

Description

dual frequency antenna

technical field

The present invention relates to an antenna device, and in particular to a dual-frequency antenna.

Background technique

Recently, with the development of communication technology, various electronic products, such as notebook computers, mobile phones, wireless access points (Access Point, AP), etc., often need to have the ability of wireless transmission.

Traditionally, various antennas such as Planar Inverse-F Antenna (PIFA), Monopole Antenna (Monopole Antenna), and Dipole Antenna (Dipole Antenna) have existed and are widely used in various handheld Wireless transmission of electronic devices, notebook computers or wireless communication devices. However, most electronic products usually need to apply communication protocols in different frequency bands. In the past, antenna architectures that were only applicable to a single frequency band could not support wireless transmission in multiple frequency bands. In addition, in response to the trend of thinner and lighter electronic products, the design of some antenna structures is also restricted.

Therefore, how to provide a multi-frequency antenna with a simple structure, which can be easily adjusted and applied according to product requirements is one of the issues that the industry is currently working on.

Contents of the invention

The object of the present invention is to provide a dual-frequency antenna, which has a simple structure and can easily adjust the frequency of the resonant mode of the antenna.

To achieve the above purpose, according to one aspect of the present invention, a dual-band antenna is provided, including a first radiating part and a second radiating part. The first radiation part is arranged along the first direction. One end of the first radiating portion includes a first feed-in portion, and the other end of the first radiating portion extends toward the second direction and forms a first bending portion. The second radiation part is arranged along the first direction. One end of the second radiating part includes a second feeding part, the second feeding part is adjacent to the first feeding part, and the projection of the end of the second feeding part in the second direction at least partially overlaps with the first radiating part. The second feed-in portion is separated from the first feed-in portion by a first interval, the first bending portion is separated from the second radiation portion by a second interval, and the first interval is not equal to the second interval.

According to an aspect of the present invention, a dual-band antenna is provided, including a first radiating part and a second radiating part. The first radiation part is arranged along the first direction. One end of the first radiating portion includes a first feed-in portion, and the other end of the first radiating portion extends toward the second direction and forms a first bending portion. The second radiation part is arranged along the first direction. One end of the second radiating part includes a second feeding part, the second feeding part is adjacent to the first feeding part, and the projection of the end of the second feeding part in the second direction at least partially overlaps with the first radiating part. The second feed-in portion is separated from the first feed-in portion by a first interval, the first bending portion is separated from the second radiation portion by a second interval, and the first interval is not equal to the second interval. Wherein, one side of the second radiating part includes a metal patch, the metal patch extends in the opposite direction of the second direction, and is separated from the first feed-in part by a third interval, at least one of the first interval, the second interval and the third interval Both are different from each other.

According to an aspect of the present invention, a dual-band antenna is provided, including a first radiating part and a second radiating part. The first radiation part is arranged along the first direction. One end of the first radiating portion includes a first feed-in portion, and the other end of the first radiating portion extends toward the second direction and forms a first bending portion. The second radiation part is arranged along the first direction. One end of the second radiating part includes a second feeding part, the second feeding part is adjacent to the first feeding part, and the projection of the end of the second feeding part in the second direction at least partially overlaps with the first radiating part. The second feed-in portion is separated from the first feed-in portion by a first interval, the first bending portion is separated from the second radiation portion by a second interval, and the first interval is not equal to the second interval. Wherein, after the other end of the second radiating portion extends in the opposite direction of the second direction, it extends toward the first radiating portion to form a second bending portion, and the terminal of the second bending portion is a distance of three thirds from the first radiating portion. The intervals, at least two of the first interval, the second interval and the third interval are different from each other.

According to an aspect of the present invention, a dual-band antenna is provided, including a first radiating part and a second radiating part. One end of the first radiating portion includes a first feed-in portion, and the other end of the first radiating portion extends toward the second direction and forms a first bending portion. The second radiation part is arranged along the first direction. One end of the second radiating part includes a second feeding part, the second feeding part is adjacent to the first feeding part, and the projection of the end of the second feeding part in the second direction at least partially overlaps with the first radiating part. The second feeding part is separated from the first feeding part by a first interval. The terminal end of the first bending portion of the first radiating portion extends toward the second radiating portion, the terminal end of the first bending portion is separated from the second radiating portion by a second interval, and the first interval is not equal to the second interval.

According to an aspect of the present invention, a dual-band antenna is provided, including a first radiating part and a second radiating part. The first radiation part is arranged along the first direction. One end of the first radiating portion extends toward a second direction to form a first bent portion, and the first direction is perpendicular to the second direction. The second radiation part is arranged along the first direction. A projection of one end of the second radiating portion in the second direction at least partially overlaps with the first radiating portion.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the preferred embodiments are specifically cited below, together with the accompanying drawings, and described in detail as follows:

Description of drawings

FIG. 1 is a schematic diagram of a dual-frequency antenna according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a dual-frequency antenna according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a dual-band antenna according to another embodiment of the present invention.

Symbol Description

100, 200, 300: dual-band antenna

102, 302: the first radiation department

104, 204, 304: the second radiation department

1022, 3022: the first bending part

2042: Metal Patch

3042: second bending part

D1: first direction

D2: Second direction

F1: the first feed-in part

F2: Second feed-in part

W1, W2: Width

G1, G1': first interval

G2, G2': second interval

G3, G3': the third interval

OL: projected length

detailed description

Various embodiments of the present disclosure will be described in detail below, with accompanying drawings as examples. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and any easy substitution, modification, and equivalent change of any of the described embodiments are included in the scope of the present application, and are defined by the appended claims. prevail. In the description of the specification, many specific details are provided in order to enable readers to have a more complete understanding of the present invention; however, the present invention may still be practiced under the premise of omitting some or all of these specific details. Also, well-known steps or elements have not been described in detail in order to avoid unnecessarily limiting the invention. The same or similar elements will be denoted by the same or similar symbols in the drawings. It should be noted that the drawings are for illustrative purposes only, and do not represent the actual size or quantity of components, unless otherwise specified.

FIG. 1 is a schematic diagram of a dual-band antenna 100 according to an embodiment of the present invention. The dual-band antenna 100 mainly includes a first radiating portion 102 and a second radiating portion 104 . The dual-band antenna 100 is, for example, printed on a substrate (not shown). The first radiating portion 102 and the second radiating portion 104 are, for example, printed on the same side of the substrate and are metal patterns separated from each other, serving as two radiating branches under the dipole antenna structure. According to the disclosed embodiment of the present invention, the first radiating portion 102 and the second radiating portion 104 are, for example, complete metal sheets without any slots and/or slits.

The first radiating portion 102 is arranged along the first direction D1. One end of the first radiating portion 102 includes the first feeding portion F1 , and the other end extends toward the second direction D2 to form the first bending portion 1022 . In this exemplary embodiment, the first direction D1 is substantially perpendicular to the second direction D2. Therefore, the first radiating portion 102 is approximately an L-shaped metal pattern. In some embodiments, as long as the first direction D1 and the second direction D2 are non-parallel, the first radiation part 102 operates in a first frequency band.

The second radiating portion 104 is also arranged along the first direction D1, but the second radiating portion 104 and the first radiating portion 102 are not arranged head-to-head on the same imaginary line, but are located on two parallel imaginary lines and are staggered from each other. As shown in FIG. 1, one end of the second radiating part 104 includes a second feeding part F2, the second feeding part F2 is adjacent to the first feeding part F1, and the end of the second radiating part 104 is in the second direction D2. The projection at least partially overlaps with the first radiating part 102 (as indicated by the shaded area, the length of the overlapping part (ie, the projection length) is marked as "OL"), and the second radiating part 104 operates in a second frequency band. According to an embodiment of the present invention, the width W1 of the end of the first radiating portion 102 including the first feeding portion F1 is different from the width W2 of the end of the second radiating portion 104 including the second feeding portion F2 . As shown in FIG. 1, the width W1 is thinner than the width W2.

The first feeding part F1 and the second feeding part F2 are used for receiving radio frequency signals from signal transmission lines (not shown). For example, the ground wire and live wire of the signal transmission line can be connected to the first feeding part F1 and the second feeding part F2 to feed the radio frequency signal to the dual-band antenna 100 . The second feeding part F2 is separated from the first feeding part F1 by a first interval G1, for example.

In this exemplary embodiment, the distance between the first bending portion 1022 and the second radiation portion 104 is a second interval G2, wherein the second interval G2 is, for example, greater than the first interval G1, and adjusting the size of the second interval G2 can adjust the first interval G2. The operating frequency and bandwidth of the band.

FIG. 2 is a schematic diagram of a dual-band antenna 200 according to another embodiment of the present invention. The dual-band antenna 200 is similar to the dual-band antenna 100 except that the dual-band antenna 200 further includes a metal patch 2042 . As shown in FIG. 2 , one side of the second radiating portion 204 of the dual-band antenna 200 includes a metal patch 2042 , and the metal patch 2042 extends in the direction opposite to the second direction D2 (downward in the figure). It can be understood that the metal patch 2042 is not limited to be implemented in the pattern shown in FIG. 2 . Any metal pattern protruding from one side of the second radiation portion 204 can be used as a metal patch 2042 according to the embodiment of the present invention. For example, the width of the metal patch 2042 may not only gradually shrink toward one end of the second radiation portion 204 as shown in FIG. Such as rectangle, trapezoid, triangle and so on. The metal patch 2042 can increase the current path formed in the second radiating part 204, thereby increasing the operating bandwidth of the antenna. In addition, the metal patch 2042 can also be used as a design factor for antenna impedance matching.

In this exemplary embodiment, there is a third distance G3 between the metal patch 2042 and the first radiation part 102 , and adjusting the size of the third distance G3 can adjust the operating frequency and bandwidth of the second frequency band. At least two of the first interval G1 , the second interval G2 and the third interval G3 are different from each other. For example, the third interval G3 is larger than the first interval G1.

FIG. 3 is a schematic diagram of a dual-band antenna 300 according to yet another embodiment of the present invention. The dual-band antenna 300 is similar to the dual-band antenna 100 , except that the first radiating portion 302 of the dual-band antenna 300 includes a first bent portion 3022 , and the second radiating portion 304 includes a second bent portion 3042 . As shown in FIG. 3 , after one end of the first radiating portion 302 extends toward the second direction D2 , its terminal end extends toward the second radiating portion 304 to form the first bending portion 3022 . Therefore, the first radiating portion 302 is a substantially U-shaped metal pattern. Wherein, the first bending portion 3022 and the second radiation portion 304 are separated by a second interval G2'.

On the other hand, one end of the second radiating portion 304 extends toward the opposite direction of the second direction D2 (downward in the figure), and then extends toward the first radiating portion 304 to form the second bending portion 3042 . Wherein, the terminal of the second bending portion 3042 is separated from the first radiation portion 302 by a third distance G3'.

Similar to the foregoing embodiments, one end of the first radiating part 302 including the first feeding part F1' at least partially overlaps with one end of the second radiating part 304 including the second feeding part F2'. Wherein, the first feeding part F1' and the second feeding part F2' are separated by a first interval G1', and at least two of the first interval G1', the second interval G2' and the third interval G3' are different from each other.

It should be noted that the dual-band antennas 100 , 200 , and 300 disclosed according to the embodiments of the present invention can also be combined and replaced to produce various deformations. For example, the first bent portion 1022 of the dual-band antenna 100, 200 and the first bent portion 3022 of the dual-band antenna 300 can be replaced with each other, the metal patch 2042 of the dual-band antenna 200 and the second bent portion of the dual-band antenna 300 The bent portion 3042 can also be replaced with each other, and the dual-band antenna 100 can be selectively added with the second bent portion 3042 of the dual-band antenna 300 , etc., and these modifications all belong to the spirit of the present invention.

To sum up, the dual-band antenna provided by the present invention is based on the dipole antenna structure, and the two radiating branches are set to partially overlap projections to excite another resonance mode, so that the antenna can perform dual-band operation. The antenna designer can easily adjust the operating frequency of the antenna by changing the length of the projected overlapping portion and/or the structure of the radiating branch. In addition, the dual-frequency antenna provided by the present invention has the advantages of simple structure and light weight of the dipole antenna, so it can be combined with various communication electronic products according to different application requirements.

Although the present invention has been disclosed in conjunction with the above preferred embodiments, they are not intended to limit the present invention. Those skilled in the technical field of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (11)

1. a kind of dual-band antenna, including：

First Department of Radiation, is set along a first direction, and one end of first Department of Radiation includes the first feeding portion, The other end of first Department of Radiation extends toward a second direction and forms one first kink；And

Second Department of Radiation, is set along the first direction, and one end of second Department of Radiation includes the second feeding portion, Projection of the end of second feeding portion in the second direction is least partially overlapped with first Department of Radiation, Second feeding portion is with first feeding portion at a distance of one first interval, first kink and second radiation At a distance of one second interval, first interval is not equal to second interval in portion.

2. dual-band antenna as claimed in claim 1, the wherein side of second Department of Radiation include that metal is mended Block, the metal patch along the oppositely extending of the second direction, and with first Department of Radiation between one the 3rd Every.

3. dual-band antenna as claimed in claim 1, the wherein other end of second Department of Radiation toward this second Direction it is oppositely extending after, then extend to form one second kink towards first Department of Radiation, this is second curved The terminal of folding part is with first Department of Radiation at a distance of one the 3rd interval.

4. dual-band antenna as claimed in claim 1, the wherein terminal of first kink are towards second spoke Portion's extension is penetrated, the terminal of first kink is with second Department of Radiation at a distance of second interval.

5. the dual-band antenna as described in claim 1,2,3 or 4, wherein second interval were more than should First interval.

6. dual-band antenna as claimed in claim 2 or claim 3, wherein first interval, second interval and Both 3rd interval wherein at least are different each other.

7. the dual-band antenna as described in claim 1,2,3 or 4, the wherein first direction with this second Direction is vertical.

8. a kind of dual-band antenna, including：

First Department of Radiation, is set along a first direction, and one end of first Department of Radiation is prolonged toward a second direction One first kink is stretched and is formed, the first direction is vertical with the second direction；And

Second Department of Radiation, is set along the first direction, and one end of second Department of Radiation is in the second direction Projection it is least partially overlapped with first Department of Radiation.

9. dual-band antenna as claimed in claim 8, the wherein side of second Department of Radiation include that metal is mended Block, the metal patch is along the oppositely extending of the second direction.

10. dual-band antenna as claimed in claim 8, the wherein other end of second Department of Radiation toward this Two directions it is oppositely extending after, then extend forming one second kink towards first Department of Radiation.

11. dual-band antennas as claimed in claim 10, the wherein terminal of first kink towards this second Department of Radiation extends, and with second Department of Radiation at a distance of an interval.