TW202013813A - Dual-band antenna - Google Patents

Abstract

A dual-band antenna includes a first radiation part and a second radiation part. The first radiation part includes a first main block, a first and a second extension part, a first and a second bending part. The first extension part and the second extension part are connected to one side of the first main block. The first and the second bending part is connected separately to an end of the first and the second extension part thereof opposite the end that is connected to the first main block. The second radiation part includes a second main block, a connecting part and a matching part. The first main block disposed adjacent to the second main part by a first gap, the connecting part disposed adjacent to the first main block by a second gap, and the second main block disposed adjacent to the second extension part by a third gap.

Description

Dual frequency antenna

The invention relates to a dual-band antenna, especially a small area, small space, low cost, independent design, which can be used on a substrate of insulating material (such as a printed circuit board), which can easily adjust the resonance mode of the antenna Frequency, to achieve a dual-band antenna for the frequency band required by the wireless LAN system.

In the current era of rapid technological development, a variety of light-weight or type antennas have been developed for use in various increasingly light-weight handheld electronic devices (such as mobile phones or notebook computers) or wireless transmission devices (USB Dongle , Wireless LAN Card or AP). For example, printed antennas that are lightweight, have good transmission performance, and can be easily placed on the inner wall of handheld electronic devices already exist, and are widely used in wireless transmission of a variety of handheld electronic devices or notebook computers or Wireless communication device.

However, the conventional antenna has many shortcomings that make people sick. For example, the conventional dual-band antenna has a large area, a large space, a high cost, requires an additional lower ground, and is limited by a system ground. Therefore, it is not suitable for electronic devices that are increasingly miniaturized.

According to this, how can there be a small area, small space, low cost, with an independent design that can be used on a substrate of insulating material (such as a printed circuit board), the frequency of the antenna resonance mode can be easily adjusted to achieve wireless The "dual-band antenna" of the frequency band required by the local area network system is a subject urgently needed to be solved by those in the relevant technical field.

In one embodiment, the present invention provides a dual-band antenna, including: a first radiating portion made of conductive material, including: a first body block; and a first extension portion connected to the first body area One side of the block; a second extension portion connected to the side of the first body block where the first extension portion is provided, and the first extension portion extend in different directions, the second extension portion and the first An angle is formed between an extension; a first turning portion is connected to the other end of the first extension portion relative to the first body block, the length direction of the first turning portion and the first extending portion The length direction is different; a second turning portion connected to the other end of the second extension portion connected to the first body block, the length direction of the second turning portion is different from the length direction of the second extension portion ; And a second radiating portion, which is a conductive material, including: a second body block; a connecting portion, connected to one side of the second body block; a matching portion, connected to the connecting portion opposite On the other side where the second body block is provided; the first body block and the second body block are disposed adjacent to each other with a first spacing, and the connection portion and the first body block are Adjacent to each other with a second distance between the second body block and the second extension with a third distance, the first body block is welded to a welding section of a signal line At one end, the one end is used as a feed-in signal end; the other end of the welding section is welded to the second body block, and the other end is used as a feed-in signal ground.

The embodiments of the present disclosure will be described in detail below, together with the drawings as examples. In addition to these detailed descriptions, the present invention can be widely implemented in other embodiments, and the easy replacement, modification, and equivalent changes of any of the described embodiments are included in the scope of this case, and the following patent scope is quasi. In the description of the specification, in order to give the reader a more complete understanding of the present invention, many specific details are provided; however, the present invention may still be implemented on the premise that some or all of these specific details are omitted. In addition, well-known steps or elements are not described in detail to avoid unnecessary limitation of the invention. The same or similar elements in the drawings will be represented by the same or similar symbols. It is important to note that the drawings are for illustrative purposes only and do not represent the actual size or number of elements unless otherwise specified.

Please refer to FIG. 1 for an embodiment structure of the dual-band antenna 1 provided by the present invention, which mainly includes a first radiating portion 10 and a second radiating portion 20, which are used as two radiating branches under a dipole antenna structure. The first radiating portion 10 and the second radiating portion 20 are made of conductive materials, for example, can be metal sheets, or the first radiating portion 10 and the second radiating portion 20 can be, for example, printed on an insulating material substrate (such as a printed circuit board) Are the same metal surface and two metal patterns separated from each other. FIG. 1 shows an embodiment in which the first radiating portion 10 and the second radiating portion 20 are two metal sheets.

The first radiating portion 10 includes a first body block 11, a first extending portion 12, a second extending portion 13, a first turning portion 14 and a second turning portion 15; the first extending portion 12 is connected to the first One side of a main body block 11; the second extension portion 13 is connected to the side of the first main body block 11 where the first extension portion 12 is provided, and extends in different directions from the first extension portion 12, the second extension portion 13 There is an angle θ1 with the first extending portion 12, and the angle θ1 is approximately 90 degrees. The first turning portion 14 is connected to the other end of the first extending portion 12 relative to the first body block 11. The length direction of the first turning portion 14 is different from the length direction of the first extending portion 12, for example, the first turning portion The length direction of the portion 14 and the length direction of the first extension portion 12 are substantially at an angle θ2 of 90 degrees; the second turning portion 15 is connected to the other end of the second extension portion 13 relative to the first body block 11, The longitudinal direction of the second turning portion 15 is different from the longitudinal direction of the second extending portion 13, for example, the longitudinal direction of the second turning portion 15 and the longitudinal direction of the second extending portion 13 form an angle θ3 of approximately 90 degrees.

The role of the second radiating portion 20 is to ground and match. The second radiating portion 20 includes a second radiating portion 20 including a second body block 21, a connecting portion 22 and a matching portion 23; the connecting portion 22 is connected and disposed on one side of the second body block 21; the matching portion 23 is connected The connecting portion 22 is disposed on the other side of the connecting body 22 with respect to the second main body block 21, which is used to adjust the impedance matching of the antenna.

The first body block 11 and the second body block 21 are adjacently arranged with a first gap G1, and the connecting portion 22 and the first body block 11 are adjacently arranged with a second gap G2. The second body block 21 and the second extension portion 13 are adjacent to each other with a third gap G3. The first body block 11 is welded to one end 311 of the welding section 31 of a signal line 30 as a feeding signal end; The other end 312 of the segment 31 is welded to the second body block 21 as the grounding end of the feed signal. The signal line 30 is soldered to one end of the second body block 21 and connected to a signal module. The portion of the welding section 31 spanning the first gap G1 serves as an intermediate isolation layer between the feed-in signal terminal and the feed-in signal ground terminal. As for the size of the first pitch G1, the second pitch G2 and the third pitch G3, there is no limit, and it is designed according to actual needs.

The length directions of the first body block 11, the first extension portion 12, the second turning portion 15, and the second body block 21 are parallel to a first direction F1, and the length directions of the second extension portion 13 and the first turning portion 14 Parallel to a second direction F2.

The first body block 11 and the first extension 12 are used to transmit and receive a signal with a first frequency, the first frequency has a first wavelength λ1, the first body block 11 (by welding to the signal line 30 The total length of the first end 311 of the segment 31) and the first extension 12 is the first length L1. The relationship between the first length L1 and the first wavelength λ1 conforms to the following formula: L1=(λ1)/4; where, the first The unit of the value of the length L1 and the unit of the value of the first wavelength λ1 are both centimeters. For example, when the first frequency is 2450 MHz, the first wavelength λ1 is 12.2 cm, so the total length (first length L1) of the first body 11 and the first extension 12 is 12.2/4=3.05 cm.

The first body block 11 and the second extension 13 are used to transmit and receive a signal with a second frequency, the second frequency has a second wavelength λ2, the first body block 11 (by welding to the signal line 30 The total length of the first end 311 of the segment 31) and the second extension 13 is the second length L2. The relationship between the second length L2 degrees and the second wavelength λ2 conforms to the following formula: L2=(λ2)/4; where, the second The unit of the value of the length L2 and the unit of the value of the second wavelength λ2 are both centimeters. For example, when the second frequency is 5000 MHz, the second wavelength λ2 is 6.0 cm, so the total length (second length L2) of the first body 11 and the second extension 13 is 6.0/4=1.5 cm.

The first extending portion 12 has a first width W1, the second turning portion 15 has a second width W2, and there is a fourth distance G4 between the first extending portion 12 and the second turning portion 15, the first width W1, the first The relationship between the two widths W2 and the fourth pitch G4 conforms to the following formula: G4>(W1+W2)/2; where the units of the values of the first width W1, the second width W2 and the fourth pitch G4 are the same. Through this design, it can be ensured that the two paths of the first body block 11 and the first extension portion 12, the first body block 11 and the second extension portion 13 form a dual-frequency structure.

It must be noted that in the embodiment shown in FIG. 1, the first extending portion 12 is not completely parallel to the first direction F1, but forms an arc with the connecting portion 22 and the matching portion 23, but this design is only an implementation For example, and does not affect the definition of the above values, in other words, when defining the first length L1, the second length L2 or the first width W1, the second width W2 and the fourth distance G4 of the present invention, as long as they can meet the above formula However, the shapes of the first radiation portion 10 and the second radiation portion 20 are not limited to the illustrations. In addition, the lengths of the first turning portion 14 and the second turning portion 15 are not limited, and depend on the frequency of actual application.

Please refer to FIG. 2 for an embodiment structure of the dual-band antenna 2 provided by the present invention. As described above, the first radiating portion 10 and the second radiating portion 20 can be printed on a substrate 40 of an insulating material. In addition, A first bare copper area 111 is provided on the first body block 11 and a second bare copper area 211 is provided on the second body block 21, which are soldered to the two ends 311, 312 of the welding section 31 of the signal line 30, respectively. Respectively as the feed-in signal terminal and feed-in signal ground terminal.

Please refer to Fig. 3 and Fig. 4, the actual application area mentioned in the figure is generally applicable to the wireless system that requires a dual-band system operating at 11/bg[2400MHz~2500MHz]+11/ac[4900MHz~5850MHz] Communication device. Figure 3 shows that at the above different operating frequency bands (about 2.4GHz and 5.15GHz), the minimum reflection loss can be achieved respectively. FIG. 4 shows that the radiation efficiency can be maintained smoothly in the above different operating frequency bands.

It must be noted that the present invention can be adjusted and modified according to the needs of the product to achieve suitable applications, for example, it can be applied to the operating frequency bands: 802.11a (5150~5850MHz), 802.11b (2400~2500MHz), 802.11g (2400~ 2500MHz), 802.11n (2.4GHz or 5GHz Band) system band requirements, or frequency band adjustment can be applied to other wideband wireless communication system device antenna applications.

In summary, the dual-band antenna provided by the present invention has a small area, a small space, and an independent design. It can be used on a substrate of insulating material (such as a printed circuit board), and can easily adjust the resonance mode of the antenna. In order to achieve the frequency band required by the wireless local area network system, compared with the conventional dual-band antenna, the invention reduces the width by more than 25-50%, which can greatly save the material cost of the printed antenna and reduce the antenna area At the same time, it does not reduce the efficiency of the antenna. In addition, the present invention can avoid the mold cost and assembly cost required by the stereo antenna and the risk of the stereo antenna being easily deformed, and can be placed at any position in the system without being limited to the system ground.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

1, 2: Dual-band antenna 10: First radiating portion 11: First body block 111: First bare copper area 12: First extension portion 13: Second extension portion 14: First turning portion 15: Second turning Part 20: Second radiation part 21: Second body block 211: Second bare copper region 22: Connection part 23: Matching part 30: Signal line 31: Solder section 311, 312: Both ends 40: Substrate F1: First Direction F2: Second direction G1: First pitch G2: Second pitch G3: Third pitch G4: Fourth pitch W1: First width W2: Second width θ1, θ2, θ3: Angle

FIG. 1 is a schematic structural diagram of an embodiment of the present invention. FIG. 2 is a schematic structural diagram of the embodiment of FIG. 1 printed on a substrate. Fig. 3 is a table of antenna reflection loss of the embodiment of Fig. 1. 4 is a radiation efficiency diagram of the antenna of the embodiment of FIG.

no

1: Dual frequency antenna

10: First Radiation Department

11: The first body block

12: The first extension

13: Second extension

14: The first turning point

15: Second turning point

20: Second Radiation Department

21: second body block

22: Connection

23: Matching Department

30: Signal cable

31: Welding section

311, 312: two ends

F1: First direction

F2: Second direction

G1: first pitch

G2: second pitch

G3: third pitch

G4: Fourth pitch

W1: first width

W2: second width

θ 1, θ 2, θ 3: included angle

Claims (10)

A dual-band antenna includes: a first radiating portion made of conductive material, including: a first body block; a first extension portion connected to one side of the first body block; a second extension A portion connected to the side of the first body block where the first extension portion is provided, and the first extension portion extend in different directions, and an angle is formed between the second extension portion and the first extension portion; A first turning portion connected to the other end of the first extending portion relative to the first body block, the length direction of the first turning portion is different from the length direction of the first extending portion; a second turning Part, connected to the other end of the second extension part connected to the first body block, the length direction of the second turning part is different from the length direction of the second extension part; and a second radiating part is Conductive material, including: a second body block; a connecting part connected to one side of the second body block; a matching part connected to the connecting part relative to the second body block The other side; the first body block and the second body block are adjacent to each other with a first spacing, and the connecting portion is adjacent to the first body block with a second spacing The first body block is welded to one end of a welding section of a signal line, and the one end is used as a feed signal The other end of the welding section is welded to the second body block, and the other end is used as the grounding end of the feed-in signal. The dual-band antenna as described in item 1 of the patent scope, wherein the length direction of the first body block, the first extension portion, the second turning portion, and the second body block is parallel to a first direction, The length direction of the second extending portion and the first turning portion is parallel to a second direction. The dual-band antenna as described in item 1 of the patent application, wherein the first body block and the first extension are used to transmit and receive a signal having a first frequency, the first frequency having a first wavelength λ1 , The total length of the first body block and the first extension is the first length L1, and the relationship between the first length L1 degrees and the first wavelength λ1 conforms to the following formula: L1=(λ1)/4; the first A body block and the second extension are used to transmit and receive a signal with a second frequency, the second frequency has a second wavelength λ2, and the total length of the first body block and the second extension is The second length L2, the relationship between the second length L2 degrees and the second wavelength λ2 conforms to the following formula: L2=(λ2)/4; where the unit of the value of the first length L1, the value of the value of the first wavelength λ1 The unit, the unit of the value of the second length L2, and the unit of the value of the second wavelength λ2 are all centimeters. The dual-band antenna as described in item 1 of the patent application, wherein the first extension portion has a first width W1, the second turning portion has a second width W2, the first extension portion and the second turning portion There is a fourth distance G4, the relationship between the first width W1, the second width W2 and the fourth distance G4 conforms to the following formula: G4>(W1+W2)/2; wherein, the first width W1 The unit of the second width W2 is the same as the value of the fourth pitch G4. The dual-band antenna as described in item 1 of the patent scope, wherein the signal line is soldered to one end of the second body block and connected to a signal module. The dual-band antenna as described in item 5 of the patent application scope, wherein the welding section spans the first pitch. The dual-band antenna as described in item 1 of the patent application, wherein the first radiating portion and the second radiating portion are disposed on a substrate made of an insulating material. The dual-band antenna as described in item 1 of the patent application range, wherein the angle between the second extension and the first extension is approximately 90 degrees. The dual-band antenna as described in item 1 of the patent application range, wherein the length direction of the first turning portion and the length direction of the first extending portion are approximately at an angle of 90 degrees. The dual-band antenna as described in item 1 of the patent application range, wherein the length direction of the second turning portion and the length direction of the second extending portion are approximately at an angle of 90 degrees.

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