Non-frequency doubling type double-frequency low-profile antenna

Abstract

The utility model relates to a non-frequency doubling type double-frequency low-profile antenna, which comprises a first metal piece, a second metal piece, a third metal piece and a fourth metal piece, an overlapping area is formed between the second metal piece and the first metal piece, and the second metal piece is used for feeding electromagnetic energy in an external transmission line into the antenna through a feeding point and coupling the electromagnetic energy to the first metal piece through the overlapping area so as to radiate the electromagnetic energy to a communication space; and the insulating spacer is arranged between the first metal piece and the second metal piece, so that the second metal piece carries out coupled feeding on the first metal piece. The antenna provided by the utility model adopts a coupled feed structure, broadens the frequency bandwidth of the antenna, supports B3 and B7 frequency bands, achieves the gain of 5.2 dBi and 7.1 dBi, has return loss below-14dB, has good impedance matching performance, miniaturizes the overall size of the antenna, and realizes the dual-frequency antenna performance under the condition of non-frequency multiplication by using the characteristic of a low-profile structure.

Description

Technical Field

[0001] The utility model relates to the field of radio frequency and wireless communication, and in particular to a non-frequency doubling dual-frequency low-profile antenna. Background Art

[0002] The rapid development of wireless communication technology is driving ever-increasing demands on the size and integration of electronic devices. However, customer performance requirements have increased, not decreased. Antennas are crucial for external communication in wireless communication devices. The reliability of these communications depends heavily on antenna performance, which can significantly impact overall performance. Due to the limited number of interfaces in wireless devices, the ability to implement multiple antennas with a single antenna is gaining increasing market attention. Consequently, dual-band and multi-band antennas are finding widespread practical application. Utility Model Content

[0003] The purpose of the present utility model is to overcome the problems existing in the prior art and provide a non-frequency-doubling dual-band low-profile antenna, which uses the low-profile structural characteristics to achieve dual-band antenna performance under non-frequency-doubling conditions and is widely applicable to scenarios such as built-in antennas, small stations or indoor distributed antennas.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A non-frequency-doubling dual-band low-profile antenna, comprising:

[0006] The first metal member is used to radiate electromagnetic waves in the working frequency band;

[0007] a second metal member having an overlapping area with the first metal member, for feeding electromagnetic energy in the external transmission line into the antenna through the feeding point, and coupling to the first metal member through the overlapping area to radiate into the communication space;

[0008] The insulating spacer is arranged between the first metal member and the second metal member, so that the second metal member couples and feeds the first metal member.

[0009] Furthermore, the first metal part includes a first branch, a second branch and a grounding point, which are respectively used to radiate B3 band electromagnetic waves, radiate B7 band electromagnetic waves, and ground, thereby widening the frequency bandwidth of the antenna and achieving the performance of an inverted F antenna.

[0010] Furthermore, the first branch, the second branch and the grounding point are connected to each other, and the grounding point is formed by the middle portion of the end of the first vertical portion that is perpendicular to the first branch and the second branch and extends outward.

[0011] Furthermore, the first branch includes a first radiating portion, a second radiating portion vertically connected to the first radiating portion, a third radiating portion vertically connected to the second radiating portion and parallel to the first radiating portion, and a fourth radiating portion vertically connected to the third radiating portion and parallel to the second radiating portion. The second branch is vertically connected to the fourth radiating portion and parallel to the third radiating portion. One end of the second branch extends toward the first radiating portion and forms an opening therebetween. The second metal part overlaps and couples with the third radiating portion.

[0012] Furthermore, the third radiating portion is provided with a slot opening inward, and the second metal member is provided with a corresponding protrusion to cover the slot.

[0013] Furthermore, the feeding point is formed by the middle portion of the end of the second vertical portion which is perpendicular to the second metal member and extends outward.

[0014] Furthermore, the shape of the insulating spacer is the same as the planar portion of the second metal member.

[0015] The beneficial effects of the utility model are:

[0016] The antenna of this utility model adopts a coupled feeding structure, which broadens the frequency bandwidth of the antenna, supports the B3 and B7 frequency bands, achieves a gain of 5.2dBi and 7.1dBi, and a return loss below -14dB. It has good impedance matching performance and miniaturizes the overall size of the antenna. It achieves dual-frequency antenna performance in non-frequency doubling conditions with its low-profile structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a spatial view of the antenna of the utility model after assembly;

[0018] Figure 2 This is a disassembled structural diagram of the antenna of the utility model;

[0019] Figure 3 This is a schematic diagram of the antenna of the utility model installed in a wireless device;

[0020] Figure 4 This is the antenna gain diagram of the utility model;

[0021] Figure 5 This is the return loss diagram of the antenna of this utility model.

[0022] Explanation of the numbers in the figure: 1. First metal part, 11. First branch, 111. First radiating part, 112. Second radiating part, 113. Third radiating part, 114. Fourth radiating part, 12. Second branch, 13. Grounding point, 14. First vertical part, 2. Second metal part, 21. Feeding point, 22. Second vertical part, 3. Insulating spacer, 4. Wireless device base, 5. Wireless device cover. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0024] Example 1:

[0025] like Figure 1 and Figure 2 As shown, a non-frequency-doubling dual-band low-profile antenna, the antenna comprising:

[0026] The first metal member 1 is used to radiate electromagnetic waves in the working frequency band;

[0027] The second metal member 2 has an overlapping area with the first metal member 1, and is used to feed the electromagnetic energy in the external transmission line into the antenna through the feeding point 21. The electromagnetic wave goes vertically upward and is coupled to the first metal member 1 through the overlapping area to be radiated into the communication space;

[0028] An insulating spacer 3 is positioned between the first metal member 1 and the second metal member 2, enabling the second metal member 2 to couple and feed the first metal member 1. Due to operating height limitations, direct feeding would not fully cover the B3 frequency band. However, coupled feeding further broadens the antenna's operating bandwidth, fully meeting performance requirements.

[0029] The first metal part 1 includes a first branch 11, a second branch 12 and a grounding point 13, which are respectively used to radiate electromagnetic waves in the B3 (1.71-1.88GHz) frequency band, radiate electromagnetic waves in the B7 (2.5-2.69GHz) frequency band, and be grounded, thereby broadening the frequency bandwidth of the antenna, miniaturizing the overall size of the antenna, and achieving the performance of an inverted F antenna.

[0030] The first branch section 11 , the second branch section 12 and the grounding point are connected to each other. The grounding point is formed by the middle portion of the end of a first vertical portion 14 that is perpendicular to the first branch section 11 and the second branch section 12 and extends outward.

[0031] The first branch 11 includes a first radiating portion 111, a second radiating portion 112 vertically connected to the first radiating portion 111, a third radiating portion 113 vertically connected to the second radiating portion 112 and parallel to the first radiating portion 111, and a fourth radiating portion 114 vertically connected to the third radiating portion 113 and parallel to the second radiating portion 112. The second branch 12 is vertically connected to the fourth radiating portion 114 and parallel to the third radiating portion 113. One end of the second branch 12 extends toward the first radiating portion 111 and forms an opening therebetween. The second metal part 2 overlaps and couples with the third radiating portion 113.

[0032] The third radiating portion 113 is provided with a slot opening inward, and the second metal member 2 is provided with a corresponding protrusion to cover the slot.

[0033] The feeding point 21 is formed by the middle portion of the end of the second vertical portion 22 which is perpendicular to the second metal member 2 and extends outward.

[0034] The shape of the insulating spacer 3 is the same as the planar portion of the second metal member 2 , which facilitates better insulation.

[0035] like Figure 4 As shown in the antenna gain diagram, it can be seen that it can reach 5.2dBi in the B3 band and 7.1dBi in the B7 band. Figure 5 As shown in the antenna return loss diagram, it can be seen that it is less than -14.0dB in the operating frequency band, which has good impedance matching performance.

[0036] Example 2:

[0037] Replace the first metal part 1 and the second metal part 2 with a flexible circuit board FPC of equivalent metal structure, replace the insulating spacer 3 with a plastic bracket, and then print the two flexible circuit boards FPC on the plastic bracket, while keeping the rest unchanged.

[0038] In addition, it should be noted that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A non-frequency doubling dual-band low-profile antenna, characterized in that: The antenna includes: A first metal member (1) is used to radiate electromagnetic waves in the working frequency band; A second metal member (2) has an overlapping area with the first metal member (1), and is used to feed electromagnetic energy in an external transmission line into the antenna through a feeding point (21), and couple to the first metal member (1) through the overlapping area to radiate into the communication space; An insulating spacer (3) is arranged between the first metal member (1) and the second metal member (2), so that the second metal member (2) couples and feeds the first metal member (1).

2. The non-frequency doubling dual-band low-profile antenna according to claim 1, characterized in that: The first metal member (1) comprises a first branch (11), a second branch (12) and a grounding point (13), which are respectively used for radiating electromagnetic waves in the B3 frequency band, radiating electromagnetic waves in the B7 frequency band and grounding, thereby widening the frequency bandwidth of the antenna and achieving the performance of an inverted F antenna.

3. The non-frequency doubling dual-band low-profile antenna according to claim 2, characterized in that: The first branch section (11), the second branch section (12) and the grounding point are connected to each other, and the grounding point is formed by the middle portion of the end of a first vertical portion (14) that is perpendicular to the first branch section (11) and the second branch section (12) and extends outward.

4. The non-frequency doubling dual-band low-profile antenna according to claim 3, characterized in that: The first branch (11) includes a first radiating portion (111), a second radiating portion (112) vertically connected to the first radiating portion (111), a third radiating portion (113) vertically connected to the second radiating portion (112) and parallel to the first radiating portion (111), and a fourth radiating portion (114) vertically connected to the third radiating portion (113) and parallel to the second radiating portion (112); the second branch (12) is vertically connected to the fourth radiating portion (114) and parallel to the third radiating portion (113); one end of the second branch (12) extends toward the first radiating portion (111) and forms an opening therebetween; the second metal member (2) overlaps and couples with the third radiating portion (113).

5. The non-frequency doubling dual-band low-profile antenna according to claim 4, characterized in that: The third radiation portion (113) is provided with a slot opening inward, and the second metal member (2) is provided with a corresponding protrusion to cover the slot.

6. The non-frequency doubling dual-band low-profile antenna according to claim 1 or 5, characterized in that: The feeding point (21) is formed by the middle portion of the end of a second vertical portion (22) that is perpendicular to the second metal piece (2) and extends outward.

7. The non-frequency doubling dual-band low-profile antenna according to claim 6, characterized in that: The shape of the insulating spacer (3) is the same as the plane portion of the second metal member (2).

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