Multi-frequency printed antenna

Abstract

A multi-frequency printed antenna includes: a circuit board; the radiating body is arranged on the circuit carrier plate; the grounding body is arranged on the circuit carrier plate and is isolated from the radiating body; the radiator is provided with a longitudinal strip-shaped first radiation part, a second radiation part which extends leftwards from the top end of the first radiation part, a third radiation part which extends leftwards from the middle section of the first radiation part and is bent for multiple times, and a fourth radiation part which extends leftwards from the bottom end of the first radiation part; and the grounding body is positioned on the right side of the radiating body and is provided with a first grounding part which is in a longitudinal strip shape, a second grounding part which extends rightwards from the top end of the first grounding part, a third grounding part which extends rightwards from the middle section of the first grounding part, and a fourth grounding part which extends rightwards from the bottom end of the first grounding part.

Description

TECHNICAL FIELD

[0001] The utility model relates to an antenna, in particular to a printed antenna with multiple frequency bands. BACKGROUND

[0002] With the rapid development of wireless communication industry, Wi-Fi 6E technology gradually popularizes, Wi-Fi 6E and original Wi-Fi 6 use same standard, but the available channel of Wi-Fi 6E extends to Wi-Fi 6GHz frequency band, and the frequency band range of Wi-Fi 6GHz is 5.925 to 7.125 GHz.According to the adoption of Wi-Fi 6GHz frequency band, and under the trend of miniaturization of electronic devices, the market demand for multi-frequency and small-size antennas that can support Wi-Fi 6GHz frequency band increases, but the miniaturization of the antenna body makes it difficult to provide multiple frequency bands.

[0003] Therefore, it is necessary to provide a multi-frequency printed antenna that increases frequency bands and supports Wi-Fi 6GHz frequency band in a limited space. SUMMARY

[0004] The utility model discloses a multi-frequency printed antenna, comprising: a circuit carrier plate; a radiator arranged on the circuit carrier plate; and a ground body arranged on the circuit carrier plate and isolated from the radiator, wherein the radiator is provided with a first radiation part in the form of a longitudinal strip, a second radiation part extending linearly to the left from the top end of the first radiation part, a third radiation part extending to the left from the middle position of the first radiation part and bent multiple times, and a fourth radiation part extending linearly to the left from the bottom end of the first radiation part, the second radiation part and the fourth radiation part are both in the form of a horizontal strip, the third radiation part is kept at a distance from the second radiation part and the fourth radiation part, and the right end of the third radiation part is provided with a feed-in end; the ground body is located on the right side of the radiator and is separated from the radiator by a first distance, the ground body is provided with a first ground part in the form of a longitudinal strip, a second ground part extending linearly to the right from the top end of the first ground part, a third ground part extending to the right from the middle position of the first ground part, and a fourth ground part extending linearly to the right from the bottom end of the first ground part, the first ground part is separated from the first radiation part by the first distance, and the top end and the bottom end of the two are cut flush with each other, the second ground part and the fourth ground part are both in the form of a horizontal strip, the third ground part is kept at a distance from the second ground part and the fourth ground part, and the extension path of the third ground part is in the form of an inverted T, and the left end of the third ground part is provided with a ground end.

[0005] In some embodiments, the third radiation portion comprises a first radiation segment extending straight left from a middle position of the first radiation portion, a second radiation segment extending left from a left end of the first radiation segment and formed by four bends, and a third radiation segment extending straight left from a left end of the second radiation segment, wherein the first radiation segment and the third radiation segment are horizontally long strips, the third radiation segment extends left by a distance greater than the first radiation segment, and the second radiation segment is a wave shape with up-and-down staggered bends.

[0006] In some embodiments, the third ground portion comprises a first ground segment extending straight right from a middle position of the first ground portion, a second ground segment extending straight up from a right end of the first ground segment, and a third ground segment extending straight down from a right end of the first ground segment, wherein the first ground segment is a horizontally long strip, the first ground segment extends right by a distance greater than the second ground portion and the fourth ground portion, the second ground segment extends up by a distance not exceeding a top edge of the second ground portion, and the third ground segment extends down by a distance not exceeding a bottom edge of the fourth ground portion.

[0007] In some embodiments, the left end of the second radiation portion and the left end of the fourth radiation portion are both cut flush, the left end of the third radiation segment is separated from the left end of the second radiation portion by a second distance in the horizontal direction, the right end of the second ground portion and the right end of the fourth ground portion are both cut flush, the left edge of the second ground segment is separated from the right end of the second ground portion by a third distance, and the left edge of the third ground segment is separated from the right end of the fourth ground portion by a fourth distance.

[0008] As mentioned above, the multi-frequency printed antenna can have multiple frequency bands in limited space and support Wi-Fi 6GHz frequency band. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to make the above and other purposes, features, advantages and embodiments of the present application more obvious and easy to understand, the content of the present application can be better understood by reading the accompanying drawings.

[0010] Figure 1 is a structural diagram of the multi-frequency printed antenna of the present application.

[0011] Figure 2 is a voltage standing wave ratio test diagram of the multi-frequency printed antenna of the present application.

[0012] Figure 3 is a Smith chart of the multi-frequency printed antenna of the present application.

[0013] Figure 4The utility model discloses a multi-frequency printed antenna's reflection loss diagram.

[0014] Figure 5 The utility model discloses a multi-frequency printed antenna's efficiency diagram. DETAILED DESCRIPTION

[0015] In order to facilitate the explanation, in the patent specification, the upper is defined as the position higher in the direction facing the drawing, the lower is defined as the position lower in the direction facing the drawing, the left is defined as the position left-hand side in the direction facing the drawing, and the right is defined as the position right-hand side in the direction facing the drawing.

[0016] Please refer to Figure 1 The utility model discloses a multi-frequency printed antenna 100 sets up on a circuit carrier plate 10 of an electronic device (not shown in the drawing), the multi-frequency printed antenna 100 is composed of a radiator 20 and a ground body 30, the radiator 20 and the ground body 30 are both set up on the circuit carrier plate 10. In the embodiment, the radiator 20 and the ground body 30 are isolated from each other, and a first spacing s1 is formed between the two.

[0017] Please refer to Figure 1 The radiator 20 is provided with a first radiation part 21, a second radiation part 22, a third radiation part 23 and a fourth radiation part 24. The first radiation part 21 is in longitudinal strip shape and is arranged in the center of the circuit carrier plate 10. The second radiation part 22 is formed by extending linearly left from the top end of the first radiation part 21, and the second radiation part 22 is in horizontal strip shape. The third radiation part 23 is formed by extending left from the middle position of the first radiation part 21 and passing through multiple bends to extend the path length of the first radiation part 21 to the terminal end of the third radiation part 23, and the right end of the third radiation part 23 is provided with a feed-in end 25. The fourth radiation part 24 is formed by extending linearly left from the bottom end of the first radiation part 21, and the fourth radiation part 24 is in horizontal strip shape. In the embodiment, the third radiation part 23 is kept away from the second radiation part 22 and the fourth radiation part 24, and the distance of the left extension of the third radiation part 23 exceeds the distance of the left extension of the second radiation part 22 and the fourth radiation part 24, while the distance of the left extension of the second radiation part 22 is equal to the distance of the left extension of the fourth radiation part 24, so that the left end of the second radiation part 22 is flush with the left end of the fourth radiation part 24.

[0018] The third radiation portion 23 comprises a first radiation segment 231 extending straight leftward from the middle position of the first radiation portion 21, a second radiation segment 232 extending leftward from the left end of the first radiation segment 231 and formed by four bends, and a third radiation segment 233 extending straight leftward from the left end of the second radiation segment 232. The first radiation segment 231 and the third radiation segment 233 are both horizontally long, and the third radiation segment 233 extends leftward farther than the first radiation segment 231, so that the left end of the third radiation segment 233 is horizontally spaced apart from the left end of the second radiation portion 22 by a second distance s2. In this embodiment, the second radiation segment 232 is in a wave shape with up-and-down staggered bends.

[0019] Continuing to refer to Figure 1 The ground body 30 is located rightward of the radiation body 20 and comprises a first ground portion 31, a second ground portion 32, a third ground portion 33, and a fourth ground portion 34. The first ground portion 31 is vertically long, and the first ground portion 31 and the first radiation portion 21 are spaced apart by the first distance s1, and the top end and the bottom end of the first ground portion 31 and the first radiation portion 21 are flush with each other. The second ground portion 32 extends straight rightward from the top end of the first ground portion 31 and is horizontally long. The third ground portion 33 extends rightward from the middle position of the first ground portion 31 and has an inverted T-shaped extension path, and the left end of the third ground portion 33 is provided with a ground end 35. The fourth ground portion 34 extends straight rightward from the bottom end of the first ground portion 31 and is horizontally long. In this embodiment, the third ground portion 33 is spaced apart from the second ground portion 32 and the fourth ground portion 34, and the second ground portion 32 and the fourth ground portion 34 extend leftward by equal distances, so that the right end of the second ground portion 32 is flush with the right end of the fourth ground portion 34.

[0020] The third grounding portion 33 comprises a first grounding section 331 extending straight to the right from the middle position of the first grounding portion 31, a second grounding section 332 extending straight upward from the right end of the first grounding section 331, and a third grounding section 333 extending straight downward from the right end of the first grounding section 331. The first grounding section 331 is horizontally long, and the first grounding section 331 extends to the right by a distance greater than the distances by which the second grounding portion 32 and the fourth grounding portion 34 extend to the right, so that the left side edge of the second grounding section 332 is separated from the right end of the second grounding portion 32 by a third spacing s3, and the left side edge of the third grounding section 333 is separated from the right end of the fourth grounding portion 34 by a fourth spacing s4. In this embodiment, the second grounding section 332 extends upward by a distance not exceeding the top edge of the second grounding portion 32, and the third grounding section 333 extends downward by a distance not exceeding the bottom edge of the fourth grounding portion 34.

[0021] When the multi-frequency printed antenna 100 is used for wireless communication, current is fed in from the feed end 25, flows through the first radiating portion 21, and then through the third radiating portion 23. Meanwhile, the first radiating portion 21 and the third radiating portion 23 are coupled to the first grounding portion 31 and the third grounding portion 33, respectively, and can oscillate at a frequency band of 2.4-2.5 GHz. Current flows through the first radiating portion 21, and then through the second radiating portion 22 and the fourth radiating portion 24. Meanwhile, the second radiating portion 22 and the fourth radiating portion 24 are coupled to the second grounding portion 32 and the fourth grounding portion 34, respectively, and can oscillate at a frequency band of 5-7.1 GHz.

[0022] In this embodiment, the first spacing s1 to the fourth spacing s4 have certain size requirements, so that the first spacing s1 to the fourth spacing s4 have a coupling effect, and can transmit or interact electromagnetic waves between the radiator 20 and the grounding body 30, so as to oscillate at a frequency band of 2.4-2.5 GHz and 5-7.1 GHz. This increases the frequency band that can be provided by the multi-frequency printed antenna 100 in a limited space.

[0023] In practice, the first spacing s1 is 1 mm, the second spacing s2 is 4.8 mm, the third spacing s3 is 2 mm, and the fourth spacing s4 is 2 mm.

[0024] Please refer to Figure 2 and Figure 3, the Voltage Standing Wave Ratio (VSWR) test diagram of the multi-frequency printed antenna 100 of the utility model and Smith chart.When the utility model multi-frequency printed antenna 100 operates at 2.4GHz, voltage standing wave ratio is 1.6734 (in the figure M1), when the utility model multi-frequency printed antenna 100 operates at 2.45GHz, voltage standing wave ratio is 1.1267 (in the figure M2), when the utility model multi-frequency printed antenna 100 operates at 2.5GHz, voltage standing wave ratio is 1.4509 (in the figure M3).When the utility model multi-frequency printed antenna 100 operates at 5GHz, voltage standing wave ratio is 2.135 (in the figure M4), when the utility model multi-frequency printed antenna 100 operates at 6GHz, voltage standing wave ratio is 1.2802 (in the figure M5), when the utility model multi-frequency printed antenna 100 operates at 7.1GHz, voltage standing wave ratio is 1.8101 (in the figure M6).Therefore, the utility model multi-frequency printed antenna 100 can be stably operated in the frequency range of 2.4GHz to 2.5GHz and 5GHz to 7.1GHz.

[0025] Please refer to Figure 4 , as Figure 4 indicated, the utility model multi-frequency printed antenna 100 operates in the frequency range of 2.4GHz to 2.5GHz and 5GHz to 7.1GHz, and the reflection loss of the frequency width is approximately within-15dB, which shows that the loss degree of the multi-frequency printed antenna 100 is small, and the radiation energy is large.

[0026] Please refer to Figure 5 , the efficiency diagram of the utility model multi-frequency printed antenna 100.The efficiency value converted from the average power when the antenna works at different frequencies is higher, indicating that the performance of the antenna is better.In the embodiment, the efficiency of the multi-frequency printed antenna 100 in the working frequency range of 2.4GHz to 2.5GHz and 5GHz to 7.1GHz is approximately 85%, therefore, the utility model multi-frequency printed antenna 100 can achieve high efficiency in the working frequency range in limited space, and the efficiency remains at a certain level.

[0027] In summary, the utility model multi-frequency printed antenna 100 can increase the frequency range provided in limited space, and support the frequency range of Wi-Fi 6GHz, adapt to the development trend of Wi-Fi 6E technology popularization and electronic product miniaturization.

[0028] Although the case has been disclosed as above with examples, it is not intended to limit the case, anyone with ordinary knowledge in the art can make some changes and modifications without departing from the spirit and scope of the case, therefore, the protection scope of the case shall be subject to the appended claims.

Claims

1. A multi-frequency printed antenna, characterized by: The multi-frequency printed antenna comprises a circuit carrier, a radiator arranged on the circuit carrier, and a ground arranged on the circuit carrier and separated from the radiator, wherein the radiator is provided with a first radiation part in longitudinal strip shape, a second radiation part extending linearly leftward from the top end of the first radiation part, a third radiation part extending leftward from the middle of the first radiation part and being bent multiple times, and a fourth radiation part extending linearly leftward from the bottom end of the first radiation part, the second and fourth radiation parts are in horizontal strip shape, the third radiation part is kept apart from the second and fourth radiation parts, and the right end of the third radiation part is provided with a feeding end; the ground is located right to the radiator and separated from the radiator by a first distance, the ground is provided with a first ground part in longitudinal strip shape, a second ground part extending linearly rightward from the top end of the first ground part, a third ground part extending rightward from the middle of the first ground part, and a fourth ground part extending linearly rightward from the bottom end of the first ground part, the first ground part is separated from the first radiation part by the first distance, and the top and bottom ends of the first ground part and the first radiation part are cut flush with each other, the second and fourth ground parts are in horizontal strip shape, the third ground part is kept apart from the second and fourth ground parts, and the left end of the third ground part is provided with a ground end.

2. The multi-band printed antenna of Claim 1, wherein: The third radiation part comprises a first radiation segment extending linearly leftward from the middle of the first radiation part, a second radiation segment extending leftward from the left end of the first radiation segment and being bent four times, and a third radiation segment extending linearly leftward from the left end of the second radiation segment, wherein the first and third radiation segments are in horizontal strip shape, the third radiation segment extends leftward by a distance greater than that of the first radiation segment, and the second radiation segment is in wave shape with up-and-down staggered bends.

3. The multi-band printed antenna of Claim 2, wherein: The third ground part comprises a first ground segment extending linearly rightward from the middle of the first ground part, a second ground segment extending linearly upward from the right end of the first ground segment, and a third ground segment extending linearly downward from the right end of the first ground segment, wherein the first ground segment is in horizontal strip shape, the first ground segment extends rightward by a distance greater than that of the second and fourth ground parts, the second ground segment extends upward by a distance not exceeding the top end of the second ground part, and the third ground segment extends downward by a distance not exceeding the bottom end of the fourth ground part.

4. The multi-band printed antenna of Claim 3, wherein: The left end of the second radiating portion and the left end of the fourth radiating portion are both cut flush, and the left end of the third radiating section is separated from the left end of the second radiating portion by a second horizontal distance, and the right end of the second ground portion and the right end of the fourth ground portion are both cut flush, and the left edge of the second ground section is separated from the right end of the second ground portion by a third distance, and the left edge of the third ground section is separated from the right end of the fourth ground portion by a fourth distance.

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