TWM654981U - Multiband printed antenna - Google Patents

Abstract

A multi-band printed antenna comprises: a circuit board having a first surface and a second surface opposite to each other; a feed end disposed at the right side of the center of the first surface; a first radiating portion extending upward and downward from the feed end to the edge of the circuit board and then to the left; a ground end disposed at the right side of the feed end; a first grounding portion extending rightward, upward and downward from the grounding portion to the edge of the circuit board and keeping a distance from the first radiating portion; a second grounding portion disposed on the second surface and symmetrical to the first grounding portion; a second radiating portion disposed at the right side of the second grounding portion; at least one radiating portion through hole and at least one grounding portion through hole electrically connecting two radiating portions and two grounding portions, respectively, and disposed along the edge of the circuit board.

Description

Multi-frequency printed antenna

This invention relates to an antenna, and more particularly to a small-sized and multi-band printed antenna.

As 5G communication technology becomes more popular, the 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.

Nowadays, people prefer electronic devices that are more convenient to carry, which has promoted the miniaturization of the appearance and size of commercially available electronic devices. As the overall size of electronic devices decreases, the space that can be occupied by the antennas connected to the host housing and the antennas housed inside the device housing is also limited. Under the premise of meeting the smaller space, the antenna needs to be able to provide multiple working frequency bands, but the miniaturization of the antenna itself makes it difficult to provide multiple frequency bands.

Therefore, it is necessary to provide a multi-band printed antenna that can provide multiple frequency bands under limited space.

The purpose of this creative content is to provide a multi-frequency printed antenna, including: a circuit board, having a first surface and a second surface opposite to each other; a feed end, the feed end is arranged in an area to the right of the center of the first surface; a first radiating portion, the first radiating portion is arranged on the first surface, and extends upward and downward from the feed 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 feed 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 board and fills the area on the right side of the first surface, and the first grounding portion is separated from the first radiating portion by a distance; a second grounding portion, the second grounding portion is arranged on the second surface and is adjacent to the first grounding portion. The grounding portion is symmetrical; 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 side area of the second surface, and the second radiating portion and the second grounding portion are separated by the distance; at least one radiating portion through hole penetrating the first surface and the second surface of the circuit board, 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 board; at least one grounding portion through hole penetrating the first surface and the second surface of the circuit board, 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 board; and wherein the extension areas of the first grounding portion and the second grounding portion are substantially equal.

In some embodiments, the left 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 off so that the lower branch radiating portion is stepped.

In some embodiments, the grounding through hole is arranged along the upper edge, the lower edge and one side edge of the circuit carrier.

Another purpose of the present invention is to provide a multi-frequency printed antenna, comprising: a circuit board 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 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 is 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 second surface The position of the second grounding portion of the circuit board corresponds to the position of the first grounding portion of the first surface; a second radiating portion, which is disposed on the second surface and disposed on one side of the second grounding portion, and 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 board, 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 board, the grounding portion through hole electrically connecting the first grounding portion and the second grounding portion.

In some embodiments, the radiation portion through hole is disposed on the upper edge of the upper branch radiation portion and the upper edge of the second radiation portion.

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

In some embodiments, the feeding part and the upper branch radiation part are both provided with the radiation part through hole, and the feeding part and the upper branch radiation part are respectively connected to the second radiation part through the radiation part through hole.

In some embodiments, the radiation portion through hole is disposed on the upper edge of the upper branch radiation portion, the upper edge of the feeding portion, and the upper edge of the second radiation portion.

In some embodiments, the edge of the first grounding portion and the edge of the second grounding portion are provided with a plurality of grounding portion through holes.

As mentioned above, the multi-frequency printed antenna of this invention can stably provide multiple working frequency bands in a limited space.

100: Multi-frequency printed antenna

10: Circuit board

11: First surface

12: Second surface

20: First Radiation Division

21: Upper branch radiation part

22: Lower branch radiation part

23: Feeding Department

25: Feeding end

30: Second Radiation Division

35: Ground terminal

40: First grounding part

50: Second grounding part

60: Radiation through hole

70: Grounding through hole

s1: Spacing

M1~M8: points

The first picture is the front structure diagram of this creation's multi-frequency printed antenna.

The second picture is the structural diagram of the back of this creation's multi-frequency printed antenna.

The third figure is the voltage-to-wave ratio test diagram of the multi-frequency printed antenna of this invention.

The fourth figure is the efficiency diagram of the multi-frequency printed antenna of this creation.

In order to explain in detail the technical content, structural features, purpose and effect of the multi-frequency printed antenna of this invention, the following examples are given and detailed descriptions are provided with drawings. For the convenience of explanation, the upper part referred to in this patent specification is defined as a higher position in the direction facing the drawing, the lower part is defined as a lower position in the direction facing the drawing, the left side is defined as a position on the left hand side in the direction facing the drawing, and the right side is defined as a position on the right hand side in the direction facing the drawing.

Please refer to the first and second figures. As shown in the first and second figures, the multi-frequency printed antenna 100 of the present invention is a monopole antenna, which is arranged on an electronic device (not shown in the figure). The multi-frequency printed antenna 100 is composed of a circuit board 10, a first radiation part 20, a second radiation part 30, a first grounding part 40, a second grounding part 50, a plurality of radiation part through holes 60 and a plurality of grounding part through holes 70. The first radiation part 20, the second radiation part 30, the first grounding part 40 and the second grounding part 50 are all arranged on the circuit board 10. The circuit board 10 has a first surface 11 and a second surface 12 opposite to each other.

Please refer to the first figure, the first radiation part 20 and the first grounding part 40 are both disposed on the first surface 11 of the circuit board 10. Please refer to the second figure, the second radiation part 30 and the second grounding part 50 are both disposed on the second surface 12 of the circuit board 10. The position of the first radiation part 20 on the first surface 11 corresponds to the position of the second radiation part 30 on the second surface 12. The position of the first grounding part 40 on the first surface 11 corresponds to the position of the second grounding part 50 on the second surface 12.

The plurality of radiation through holes 60 and the plurality of grounding through holes 70 penetrate the first surface 11 and the second surface 12 of the circuit board 10, wherein the plurality of radiation through holes 60 electrically connect the first radiation part 20 and the second radiation part 30, and the plurality of grounding through holes 70 electrically connect the first grounding part 40 and the second grounding part 50. The plurality of radiation through holes 60 are arranged along the upper edge of the first radiation part 20 and the upper edge of the second radiation part 30. The plurality of grounding through holes 70 are arranged along the periphery of the first grounding part 40 and the periphery of the second grounding part 50.

Continuing to refer to the first figure, the first radiating portion 20 is approximately located in the middle and left side of the first surface 11 of the circuit board 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 radiating portion 20 extends upward and downward from the feeding end 25 to the edge of the circuit board 10, and extends to the left to form an upper branch radiating portion 21 and a lower branch radiating 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 edge of the upper branch radiation portion 21 is aligned with the edge of the circuit board 10, and the upper left corner of the lower branch radiation portion 22 is cut off so that the lower branch radiation portion 22 is stepped, and the distance that the lower branch radiation portion 22 extends to the left in a straight line is shorter than the distance that the upper branch radiation portion 21 extends to the left in a straight line.

Please refer to the first and second figures again. A grounding terminal 35 is provided on the left edge of the first grounding portion 40. The feeding terminal 25 is provided on the right edge of the feeding portion 23. The feeding terminal 25 and the grounding terminal 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. The first grounding portion 40 and the first radiating portion 20 are separated by a distance s1. The shape of the second grounding portion 50 is symmetrical to the shape of the first grounding portion 40. 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 distance s1. In this embodiment, the second radiating portion 30 is roughly disposed in the middle of the second surface 12, the second grounding portion 50 covers the entire left side of the second surface 12, and the shape of the second radiating portion 30 is roughly rectangular.

As shown in the first and second figures, the radiation portion through hole 60 is arranged along the upper edge of the circuit board 10, and the grounding portion through hole 70 is arranged along the upper edge, the lower edge and one side edge of the circuit board 10.

When the multi-frequency printed antenna 100 of this invention is used for wireless communication, the current is fed from the feeding end 25, and the current passes through the feeding part 23 and the upper branch radiation part 21 to oscillate a frequency band of 600MHZ~960MHZ. At the same time, the current passes through the feeding part 23, the lower branch radiation part 22 and the second radiation part 30 to oscillate a frequency band of 1710MHZ~2700MHZ.

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~3800MHZ and 4700MHZ~6000MHZ through the mutual transmission or interaction of the electromagnetic waves of the first radiation part 20, the first grounding part 40 and the second grounding part 50. In practice, the spacing s1 is 2 mm. This increases the frequency bands that can be provided by the multi-frequency printed antenna 100 in a limited space.

Please refer to the third figure, which is the voltage standing wave ratio (VSWR) test diagram of the multi-frequency printed antenna 100 of the present invention. When the multi-frequency printed antenna 100 of the present invention operates at 700MHz, the voltage standing wave ratio is 6.2505 (M1 in the figure), when the multi-frequency printed antenna 100 of the present invention operates at 960MHz, the voltage standing wave ratio is 3.4606 (M2 in the figure), when the multi-frequency printed antenna 100 of the present invention operates at 1710MHz, the voltage standing wave ratio is 4.1363 (M3 in the figure), when the multi-frequency printed antenna 100 of the present invention 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 invention operates at 3600 MHz, the voltage-to-wave ratio is 2.5236 (M5 in the figure); when the multi-frequency printed antenna 100 of the invention operates at 3800 MHz, the voltage-to-wave ratio is 2.5652 (M6 in the figure); when the multi-frequency printed antenna 100 of the invention operates at 4200 MHz, the voltage-to-wave ratio is 2.2551 (M7 in the figure); when the multi-frequency printed antenna 100 of the invention operates at 6000 MHz, the voltage-to-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~960MHz, 1710MHz~2700MHz, 3300MHz~3800MHz and 4700MHz~6000MHz. According to the above voltage-to-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~960MHz, 1710MHz~2700MHz, 3300MHz~3800MHz and 4700MHz~6000MHz is roughly within -20dB, indicating that the loss 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.

Please refer to Figure 4 and Table 1 for the efficiency diagram and data table of the multi-frequency printed antenna 100 of the present invention. 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~960MHz, 1710MHz~2700MHz, 3300MHz~3800MHz and 4700MHz~6000MHz is approximately 65%. Therefore, the multi-frequency printed antenna 100 of the present invention can achieve high efficiency in the working frequency band in a limited space and its performance is maintained at a certain level.

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

Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field may make some changes and modifications within the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of the patent application attached hereto.

100: Multi-frequency printed antenna

10: Circuit board

11: First surface

20: First Radiation Division

21: Upper branch radiation part

22: Lower branch radiation part

23: Feeding Department

25: Feeding end

35: Ground terminal

40: First grounding part

60: Radiation through hole

70: Grounding through hole

s1: Spacing

Claims (9)

A multi-frequency printed antenna comprises: a circuit board having a first surface and a second surface opposite to each other; a feed end, the feed end being arranged in a region 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 board, and extending leftward 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 being 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 board and filling the region 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 opposite to 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 left side area of the second surface, and the second radiating portion and the second grounding portion are separated by the distance; at least one radiating portion through hole penetrating the first surface and the second surface of the circuit board, 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 board; at least one grounding portion through hole penetrating the first surface and the second surface of the circuit board, 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 board; and wherein the extension areas of the first grounding portion and the second grounding portion are substantially equal. A multi-band printed antenna as described in claim 1, wherein the left 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 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 so that the lower branch radiating portion is stepped. A multi-frequency printed antenna as described in claim 2, wherein the grounding through hole is arranged along the upper edge, the lower edge and one side edge of the circuit carrier. A multi-band printed antenna comprises: a circuit board 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 grounding portion on the second surface being The position of the ground portion corresponds to the position of the first ground portion of the first surface; a second radiation portion is arranged on the second surface and arranged on one side of the second ground portion, and the position of the second radiation portion of the second surface corresponds to the position of the feeding portion of the first radiation portion of the first surface; at least one radiation portion through hole penetrating the first surface and the second surface of the circuit board, the radiation portion through hole electrically connects the first radiation portion and the second radiation portion, and connects the upper branch radiation portion and the second radiation portion; and at least one ground portion through hole penetrating the first surface and the second surface of the circuit board, the ground portion through hole electrically connects the first ground portion and the second ground portion. The multi-frequency printed antenna as described in claim 4, wherein the radiation portion through hole is disposed on the upper edge of the upper branch radiation portion and the upper edge of the second radiation portion. A multi-frequency printed antenna as described in claim 5, wherein the grounding portion through hole is disposed at the edge of the first grounding portion and the edge of the second grounding portion. The multi-frequency printed antenna as described in claim 4, wherein the feeding part and the upper branch radiation part are both provided with the radiation part through hole, and the feeding part and the upper branch radiation part are respectively connected to the second radiation part through the radiation part through hole. The multi-frequency printed antenna as described in claim 4, wherein the radiation portion through hole is disposed on the upper edge of the upper branch radiation portion, the upper edge of the feed portion and the upper edge of the second radiation portion. A multi-frequency printed antenna as described in claim 8, wherein the edge of the first grounding portion and the edge of the second grounding portion are provided with a plurality of grounding portion through holes.