Multi-frequency printed antenna

Abstract

A multi-frequency printed antenna includes: a circuit board having a first surface and a second surface opposite to each other; the feed-in end is arranged on the right side of the center of the first surface; the first radiation part respectively extends upwards and downwards from the feed-in end to the edge of the circuit carrier plate and then extends leftwards; the grounding end is positioned on the right side of the feed-in end; the first grounding part extends rightwards, upwards and downwards from the grounding end to the edge of the circuit carrier plate, and a distance is kept between the first grounding part and the first radiation part; the second grounding part is arranged on the second surface and is symmetrical to the first grounding part; the second radiation part is positioned on the right side of the second grounding part; and the at least one radiation part through hole and the at least one grounding part through hole are electrically connected with the two radiation parts and the two grounding parts respectively and are arranged along the edge of the circuit carrier board.

Description

Technical Field

[0001] The utility model relates to an antenna, in particular to a small-sized printed antenna with multiple frequency bands. Background Art

[0002] As 5G communication technology becomes more popular, various frequency bands of 5G communication are gradually being widely adopted. The FR1 frequency band of 5G communication partially overlaps with the original 4G communication frequency band, which increases the demand for multi-band antennas used in mobile communication products.

[0003] Nowadays, people prefer electronic devices that are more convenient to carry, which has promoted the miniaturization of the appearance and size design of commercially available electronic devices. As the overall size of electronic devices becomes smaller, the space that can be occupied by antennas external to the host housing and antennas housed inside the device housing is also limited. Under the premise of fitting into a smaller space, the antenna must be able to provide multiple operating frequency bands, but the miniaturization of the antenna itself makes it difficult to provide multiple frequency bands.

[0004] Therefore, it is necessary to provide a multi-frequency printed antenna that can provide multiple frequency bands under limited space. Summary of the invention

[0005] The purpose of the present utility model is to provide a multi-frequency printed antenna, comprising: a circuit carrier having a first surface and a second surface opposite to each other; a feed end, the feed end being arranged in an area slightly to the right of the center of the first surface; a first radiating portion, the first radiating portion being arranged on the first surface, and extending upward and downward from the feed end to the edge of the circuit carrier respectively, and extending to the left to form an upper branch radiating portion and a lower branch radiating portion; a grounding end, the grounding end being arranged on the first surface and located on the right side of the feed end; a first grounding portion, the first grounding portion extending rightward, upward and downward from the grounding end to the edge of the circuit carrier and covering the area on the right side of the first surface, the first grounding portion being spaced apart from the first radiating portion by a distance; a second grounding portion, the second grounding portion being arranged on the second surface and being spaced apart from the The first grounding portion is symmetrical in shape; a second radiating portion, the second radiating portion is arranged on the second surface and is located on the right side of the second grounding portion, the second radiating portion and the second grounding portion both cover the left area of ​​the second surface, and the second radiating portion and the second grounding portion are separated by the spacing; at least one radiating portion through hole penetrating the first surface and the second surface of the circuit carrier, the radiating portion through hole electrically connects the first radiating portion and the second radiating portion, and is arranged along the edge of the circuit carrier; at least one grounding portion through hole penetrating the first surface and the second surface of the circuit carrier, the grounding portion through hole electrically connects the first grounding portion and the second grounding portion, and is arranged along the edge of the circuit carrier; and wherein the extension areas of the first grounding portion and the second grounding portion are substantially equal.

[0006] In some embodiments, the left end edge of the upper branch radiating portion is flush with the edge of the circuit carrier, the distance that the lower branch radiating portion extends to the left in a straight line is shorter than the distance that the upper branch radiating portion extends to the left in a straight line, and the upper left corner of the lower branch radiating portion is cut off to make the lower branch radiating portion stepped.

[0007] In some embodiments, the grounding through holes are disposed along an upper edge, a lower edge, and a side edge of the circuit carrier.

[0008] Another object of the present invention is to provide a multi-frequency printed antenna, comprising: a circuit carrier having a first surface and a second surface opposite to each other; a first radiating portion, disposed on the first surface, the first radiating portion comprising: a feeding portion; a feeding end, disposed on the feeding portion; an upper branch radiating portion, extending from the upper end of the feeding portion to the left; a lower branch radiating portion, extending from the lower end of the feeding portion to the left, the extension length of the lower branch radiating portion being less than the extension length of the upper branch radiating portion; a first grounding portion, disposed on the right side of the feeding portion and spaced apart from the feeding portion by a distance; a grounding end, disposed on the first grounding portion; a second grounding portion, disposed on the second surface and symmetrically shaped with the first grounding portion, the second The position of the second grounding portion of the surface corresponds to the position of the first grounding portion of the first surface; a second radiating portion, arranged on the second surface and on one side of the second grounding portion, the position of the second radiating portion of the second surface corresponds to the position of the feeding portion of the first radiating portion of the first surface; at least one radiating portion through hole penetrating the first surface and the second surface of the circuit carrier, the radiating portion through hole electrically connecting the first radiating portion and the second radiating portion, and connecting the upper branch radiating portion and the second radiating portion; and at least one grounding portion through hole penetrating the first surface and the second surface of the circuit carrier, the grounding portion through hole electrically connecting the first grounding portion and the second grounding portion.

[0009] In some embodiments, the radiation portion through hole is disposed at an upper edge of the upper branch radiation portion and an upper edge of the second radiation portion.

[0010] In some embodiments, the grounding portion through hole is disposed at an edge of the first grounding portion and an edge of the second grounding portion.

[0011] In some embodiments, the feeding portion and the upper branch radiating portion are both provided with the radiating portion through hole, and the feeding portion and the upper branch radiating portion are respectively connected to the second radiating portion through the radiating portion through the radiating portion through hole.

[0012] In some embodiments, the radiation portion through hole is disposed at an upper edge of the upper branch radiation portion, an upper edge of the feeding portion, and an upper edge of the second radiation portion.

[0013] In some embodiments, a plurality of grounding portion through holes are disposed at an edge of the first grounding portion and an edge of the second grounding portion.

[0014] As described above, the multi-frequency printed antenna of the utility model can stably provide multiple operating frequency bands in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the above and other purposes, features, advantages and embodiments of the present invention more obvious and understandable, the content of the present invention can be better understood when reading in conjunction with the accompanying drawings.

[0016] Figure 1 It is a structural diagram of the front side of the multi-frequency printed antenna of the utility model.

[0017] Figure 2 It is a structural diagram of the back side of the multi-frequency printed antenna of the utility model.

[0018] Figure 3 This is a voltage standing wave ratio test diagram of the multi-frequency printed antenna of the utility model.

[0019] Figure 4 This is an efficiency diagram of the multi-frequency printed antenna of the utility model. DETAILED DESCRIPTION

[0020] In order to explain in detail the technical content, structural features, objectives and effects of the multi-frequency printed antenna of the utility model, the following examples are given and detailed descriptions are provided with the help of drawings. For the convenience of description, the upper part referred to in this specification is defined as a higher position in the direction facing the drawings, the lower part is defined as a lower position in the direction facing the drawings, the left part is defined as a position on the left hand side in the direction facing the drawings, and the right part is defined as a position on the right hand side in the direction facing the drawings.

[0021] See also Figure 1 and Figure 2 ,like Figure 1 and Figure 2 As shown, the multi-frequency printed antenna 100 of the utility model is a monopole antenna, which is disposed on an electronic device (not shown in the figure), and the multi-frequency printed antenna 100 is composed of a circuit carrier 10, a first radiating portion 20, a second radiating portion 30, a first grounding portion 40, a second grounding portion 50, a plurality of radiating portion through holes 60 and a plurality of grounding portion through holes 70, wherein the first radiating portion 20, the second radiating portion 30, the first grounding portion 40 and the second grounding portion 50 are all disposed on the circuit carrier 10. The circuit carrier 10 has a first surface 11 and a second surface 12 opposite to each other.

[0022] See also Figure 1 , both the first radiation portion 20 and the first grounding portion 40 are disposed on the first surface 11 of the circuit board 10. Figure 2, the second radiation portion 30 and the second grounding portion 50 are both disposed on the second surface 12 of the circuit carrier 10. The position of the first radiation portion 20 on the first surface 11 corresponds to the position of the second radiation portion 30 on the second surface 12. The position of the first grounding portion 40 on the first surface 11 corresponds to the position of the second grounding portion 50 on the second surface 12.

[0023] The plurality of radiation portion through holes 60 and the plurality of ground portion through holes 70 all penetrate the first surface 11 and the second surface 12 of the circuit board 10, wherein the plurality of radiation portion through holes 60 electrically connect the first radiation portion 20 and the second radiation portion 30, and the plurality of ground portion through holes 70 electrically connect the first ground portion 40 and the second ground portion 50. The plurality of radiation portion through holes 60 are disposed along the upper edge of the first radiation portion 20 and the upper edge of the second radiation portion 30. The plurality of ground portion through holes 70 are disposed along the periphery of the first ground portion 40 and the periphery of the second ground portion 50.

[0024] Continue reading Figure 1 The first radiation portion 20 is approximately located in the middle and left part of the first surface 11 of the circuit carrier 10, and is provided with a feeding portion 23 located in the center of the first surface 11, and a feeding end 25 is provided on the feeding portion 23. The extension path of the first radiation portion 20 extends upward and downward from the feeding end 25 to the edge of the circuit carrier 10, and extends to the left to form an upper branch radiation portion 21 and a lower branch radiation portion 22. In this embodiment, the upper branch radiation portion 21 extends to the left from the upper end of the feeding portion 23, and the lower branch radiation portion 22 extends to the left from the lower end of the feeding portion 23. The left end edge of the upper branch radiation portion 21 is aligned with the edge of the circuit carrier 10, and the upper left corner of the lower branch radiation portion 22 is cut so that the lower branch radiation portion 22 is stepped, and the distance that the lower branch radiation portion 22 extends to the left is shorter than the distance that the upper branch radiation portion 21 extends to the left.

[0025] Please see again Figure 1 and Figure 2, a grounding end 35 is provided at the left edge of the first grounding portion 40, the feeding end 25 is arranged at the right edge of the feeding portion 23, and the feeding end 25 and the grounding end 35 are opposite to each other in the left and right directions, the first grounding portion 40 covers the right area of ​​the first surface 11 of the circuit carrier 10, and the first grounding portion 40 and the first radiating portion 20 are separated by a spacing s1. The shape of the second grounding portion 50 is symmetrical to the shape of the first grounding portion 40, and the extension area of ​​the second grounding portion 50 is substantially equal to the extension area of ​​the first grounding portion 40. The second radiating portion 30 is located on the right side of the second grounding portion 50 and is separated from the second grounding portion 50 by the spacing s1. In this embodiment, the second radiating portion 30 is approximately arranged in the middle of the second surface 12, the second grounding portion 50 covers the left area of ​​the second surface 12, and the shape of the second radiating portion 30 is substantially rectangular.

[0026] like Figure 1 to Figure 2 As shown, the radiation portion through hole 60 is disposed along the upper edge of the circuit carrier 10 , and the grounding portion through hole 70 is disposed along the upper edge, the lower edge and one side edge of the circuit carrier 10 .

[0027] When the multi-frequency printed antenna 100 of the present invention is used for wireless communication, current is fed into the feeding end 25, and the current passes through the feeding portion 23 and the upper branch radiation portion 21 to oscillate a frequency band of 600 MHZ to 960 MHZ. Meanwhile, the current passes through the feeding portion 23, the lower branch radiation portion 22 and the second radiation portion 30 to oscillate a frequency band of 1710 MHZ to 2700 MHZ.

[0028] In this embodiment, the spacing s1 has a certain size requirement, so that the spacing s1 has a coupling effect, and can oscillate the frequency bands of 3300MHZ to 3800MHZ and 4700MHZ to 6000MHZ through the electromagnetic waves of the first radiating portion 20, the first grounding portion 40 and the second grounding portion 50. In practice, the spacing s1 is 2 mm. This increases the frequency bands that the multi-frequency printed antenna 100 of the utility model can provide in a limited space.

[0029] See also Figure 3, which is a voltage standing wave ratio (VSWR) test diagram of the multi-frequency printed antenna 100 of the utility model. When the multi-frequency printed antenna 100 of the utility model operates at 700MHz, the voltage standing wave ratio is 6.2505 (M1 in the figure), when the multi-frequency printed antenna 100 of the utility model operates at 960MHz, the voltage standing wave ratio is 3.4606 (M2 in the figure), when the multi-frequency printed antenna 100 of the utility model operates at 1710MHz, the voltage standing wave ratio is 4.1363 (M3 in the figure), when the multi-frequency printed antenna 100 of the utility model operates at 2700MHz, the voltage standing wave ratio is 2.3114 (M4 in the figure), when When the multi-frequency printed antenna 100 of the present invention operates at 3600MHz, the voltage standing wave ratio is 2.5236 (M5 in the figure), when the multi-frequency printed antenna 100 of the present invention operates at 3800MHz, the voltage standing wave ratio is 2.5652 (M6 in the figure), when the multi-frequency printed antenna 100 of the present invention operates at 4200MHz, the voltage standing wave ratio is 2.2551 (M7 in the figure), and when the multi-frequency printed antenna 100 of the present invention operates at 6000MHz, the voltage standing wave ratio is 2.1725 (M8 in the figure). Therefore, the multi-frequency printed antenna 100 of the present invention can stably operate in the frequency bands of 600MHz to 960MHz, 1710MHz to 2700MHz, 3300MHz to 3800MHz, and 4700MHz to 6000MHz. According to the above voltage standing wave ratio, it can be calculated that the reflection loss of the bandwidth of the multi-frequency printed antenna 100 of the present invention operating in the frequency bands of 600MHz to 960MHz, 1710MHz to 2700MHz, 3300MHz to 3800MHz and 4700MHz to 6000MHz is roughly within -20dB, indicating that the loss degree of the multi-frequency printed antenna 100 of the present invention is small and the radiation energy of the multi-frequency printed antenna 100 is large.

[0030] See also Figure 4 , is an efficiency diagram of the multi-frequency printed antenna 100 of the utility model. When the antenna works at different frequencies, the higher the efficiency value converted from the average power, the better the performance of the antenna. In this embodiment, the efficiency of the multi-frequency printed antenna 100 in the working frequency bands of 600MHz to 960MHz, 1710MHz to 2700MHz, 3300MHz to 3800MHz and 4700MHz to 6000MHz is approximately 65%. Therefore, the multi-frequency printed antenna 100 of the utility model can achieve high efficiency in the working frequency band in a limited space and its performance is maintained at a certain level.

[0031] In summary, the multi-frequency printed antenna 100 of the present invention can increase the frequency bands provided in a limited space, adapting to the development trend of popularization of 5G communication technology and miniaturization of electronic products.

[0032] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the attached claims.

Claims

1. A multi-frequency printed antenna, characterized in that: The invention comprises: a circuit carrier having a first surface and a second surface opposite to each other; a feeding end, the feeding end being arranged in a region slightly to the right of the center of the first surface; a first radiating portion, which is disposed on the first surface and extends upward and downward from the feeding end to the edge of the circuit board, and extends to the left to form an upper branch radiating portion and a lower branch radiating portion; a grounding end, the grounding end is arranged on the first surface and is located on the right side of the feeding end; a first grounding portion, the first grounding portion extends from the grounding end to the right, upward and downward to the edge of the circuit carrier and covers the area on the right side of the first surface, and the first grounding portion is separated from the first radiating portion by a spacing; a second grounding portion, the second grounding portion is arranged on the second surface and is symmetrical with the first grounding portion; a second radiating portion, the second radiating portion is arranged on the second surface and is located on the right side of the second grounding portion, the second radiating portion and the second grounding portion both cover the area on the left side of the second surface, and the second radiating portion and the second grounding portion are separated by the spacing; at least one radiating portion through hole penetrating the first surface and the second surface of the circuit carrier, the radiating portion through hole electrically connects the first radiating portion and the second radiating portion, and is arranged along the edge of the circuit carrier; at least one grounding portion through hole penetrating the first surface and the second surface of the circuit carrier, the grounding portion through hole electrically connects the first grounding portion and the second grounding portion, and is arranged along the edge of the circuit carrier; and wherein the extension areas of the first grounding portion and the second grounding portion are substantially equal.

2. The multi-frequency printed antenna according to claim 1, characterized in that: The left end edge of the upper branch radiating portion is aligned with the edge of the circuit board, the distance that the lower branch radiating portion extends to the left is shorter than the distance that the upper branch radiating portion extends to the left, and the upper left corner of the lower branch radiating portion is cut to make the lower branch radiating portion stepped.

3. The multi-frequency printed antenna according to claim 2, characterized in that: The grounding through hole is arranged along the upper edge, the lower edge and one side edge of the circuit carrier.

4. A multi-frequency printed antenna, characterized in that: It comprises: a circuit carrier having a first surface and a second surface opposite to each other; a first radiating portion, arranged on the first surface, the first radiating portion comprising: a feeding portion; a feeding end, arranged on the feeding portion; an upper branch radiating portion, extending leftward from the upper end of the feeding portion; a lower branch radiating portion, extending leftward from the lower end of the feeding portion, the extension length of the lower branch radiating portion being less than the extension length of the upper branch radiating portion; a first grounding portion, arranged on the right side of the feeding portion and spaced apart from the feeding portion by a distance; a grounding end, arranged on the first grounding portion; a second grounding portion, arranged on the second surface and symmetrically shaped with the first grounding portion, the position of the second grounding portion on the second surface corresponding to the first surface The position of the first grounding portion; a second radiating portion, arranged on the second surface and on one side of the second grounding portion, the position of the second radiating portion on the second surface corresponds to the position of the feeding portion of the first radiating portion on the first surface; at least one radiating portion through hole penetrating the first surface and the second surface of the circuit carrier, the radiating portion through hole electrically connecting the first radiating portion and the second radiating portion, and connecting the upper branch radiating portion and the second radiating portion; and at least one grounding portion through hole penetrating the first surface and the second surface of the circuit carrier, the grounding portion through hole electrically connecting the first grounding portion and the second grounding portion.

5. The multi-frequency printed antenna according to claim 4, characterized in that: The radiation portion through hole is disposed at an upper edge of the upper branch radiation portion and an upper edge of the second radiation portion.

6. The multi-frequency printed antenna according to claim 5, characterized in that: The grounding portion through hole is disposed at an edge of the first grounding portion and an edge of the second grounding portion.

7. The multi-frequency printed antenna according to claim 4, characterized in that: The feeding portion and the upper branch radiating portion are both provided with the radiating portion through hole, and the feeding portion and the upper branch radiating portion are respectively connected to the second radiating portion through the radiating portion through hole.

8. The multi-frequency printed antenna according to claim 4, characterized in that: The radiation portion through hole is disposed at an upper edge of the upper branch radiation portion, an upper edge of the feeding portion, and an upper edge of the second radiation portion.

9. The multi-frequency printed antenna according to claim 8, characterized in that: A plurality of grounding portion through holes are disposed on an edge of the first grounding portion and an edge of the second grounding portion.

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