TWM652541U - Multiband printed antenna - Google Patents

Abstract

A multi-frequency printed antenna, including: a circuit carrier board; a A ground body on the left part of the circuit carrier board; a radiator located in the middle part of the circuit carrier board and separated from the ground body; and a connecting part, the connection part extends from the lower part of the ground body to the right Extends and is connected to the bottom of the radiator; wherein the ground body is provided with a ground portion and an extension section extending from the upper part of the ground section and extending toward the top of the radiator, and the extension section is stepped; The radiator is provided with a first radiating part, a second radiating part formed by a lower part of the first radiating part extending straight to the right, and a feed part formed by a lower part of the first radiating part extending to the left, The feed portion is disposed in a space surrounded by the extension section, the ground portion and the connecting portion.

Description

multi-frequency printed antenna

The invention relates to an antenna, in particular to a printed antenna with multiple frequency bands.

With the rapid development of the high-tech communication industry, in order to improve the speed and stability of data transmission, different communication technologies have begun to adopt new frequency bands, resulting in an increasing demand for communication product antennas in multiple frequency bands.

The antennas of electronic devices currently used for mobile communications on the market are all housed inside the device casing. Taking electronic devices with metal casings as an example, the antennas are not only limited by the space of the casing, but are also subject to the shielding effect of metal on electromagnetic waves. Impact, small dipole antennas, planar inverted F antennas (PIFA), etc. are usually used as antennas for electronic devices. However, the small size makes it difficult for the antenna itself to provide multiple frequency bands.

Therefore, it is necessary to provide a multi-frequency printed antenna that can increase the provided frequency band and work stably in the case of limited space.

The purpose of this creative content is to provide a multi-frequency printed antenna, which includes: a circuit carrier board; a grounding body disposed on the left side of the circuit carrier board; a radiator disposed in the middle part of the circuit carrier board and separated from the ground body; and a connecting part extending to the right from the lower part of the right edge of the ground body and connected to the radiator The bottom; wherein the grounding body is provided with a grounding portion and an extension section extending from the upper part of the right edge of the grounding section and extending towards the top of the radiator, the extension section is in a stepped shape; the radiator is provided with There is a first radiating part, a second radiating part extending linearly to the right from the lower part of the right edge of the first radiating part, and a feed part extending leftward from the lower part of the left edge of the first radiating part. , the first radiating part is in the shape of a longitudinal strip, the second radiating part is in the shape of a transverse strip, and the feed part is provided in the space surrounded by the extension section, the ground part and the connecting part. within.

In some embodiments, the right edge of the extension section is separated from the left edge of the first radiating portion by a first distance, and the upper side edge of the feed portion is separated from the lower side edge of the extension section by a second distance. , the left edge of the feed-in part is separated from the right edge of the ground part by a third distance, and the lower side edge of the feed-in part is separated by a fourth distance from the upper side edge of the connection.

In some embodiments, the circuit carrier board is provided with at least one screw hole.

Based on the above, the multi-band printed antenna of the present invention can have multi-band functions in a limited space and can work stably.

100:Multi-frequency printed antenna

10:Circuit carrier board

20: Ground body

21: Grounding part

22:Extended section

30:radiator

31:First Radiation Department

32:Second Radiation Department

33: Feeding Department

40:Connection part

50: Clearance area

s1: first spacing

s2: second spacing

s3: third spacing

s4: fourth spacing

v1~v3: screw hole

w22,w31,w32:width

M1~M5: points

The first picture is the structural diagram of the multi-band printed antenna of this invention.

The second picture is the voltage standing wave ratio test chart of the multi-frequency printed antenna of this invention.

The third picture is the efficiency diagram of the multi-band printed antenna of this invention.

In order to explain in detail the technical content, structural features, objectives and effects of the multi-band printed antenna 100 of the present invention, examples are given below and explained in detail along with the drawings.

Please refer to the first figure. As shown in the first figure, the multi-band printed antenna 100 of the present invention is a Planar Inverted-F Antenna (PIFA), which is installed in an electronic device (not shown in the figure). On the circuit carrier board 10, the multi-frequency printed antenna 100 is composed of a ground body 20, a radiator 30 and a connecting part 40. The ground body 20, the radiator 30 and the connecting part 40 are all provided with On the circuit carrier board 10 , the ground body 20 and the radiator 30 are separated from each other, and a gap is formed between them. The connecting portion 40 is connected to the ground body 20 and the radiator 30 . 30. In this embodiment, the connecting portion 40 is connected to the lower part of the right edge of the ground body 20 and the bottom of the radiator 30.

The grounding body 20 is disposed on the left side of the circuit carrier board 10 . The grounding body 20 is provided with a grounding portion 21 and an extension section 22 . The extension section 22 extends from an upper portion of the right edge of the ground portion 21 and extends toward the top of the radiator 30 . In this embodiment, the upper right corner of the extension section 22 is cut so that the extension section 22 has a stepped shape.

The radiator 30 is disposed in the middle part of the circuit carrier board 10 On the right side of the ground body 20 , the radiator 30 is provided with a first radiation part 31 , a second radiation part 32 and a feed part 33 . The first radiating part 31 is in the shape of a longitudinal strip, and the left edge of the first radiating part 31 is separated from the right edge of the extension section 22 by a first spacing s1. The second radiating part 32 is formed by a lower part of the right edge of the first radiating part 31 extending straight to the right, and the second radiating part 32 is in a transverse strip shape. The feed portion 33 is formed by extending leftward from a lower portion of the left edge of the first radiation portion 31 .

Continuing to refer to the first figure, in this embodiment, the feed portion 33 is disposed in the space surrounded by the extension section 22 , the ground portion 21 and the connecting portion 40 , wherein the feed portion 33 The upper edge is separated from the lower edge of the extension section 22 by a second distance s2. The left edge of the feed portion 33 is separated from the right edge of the ground portion 21 by a third distance s3. The lower edge of the feed portion 33 is separated by a third distance s3. The side edge is separated from the upper side edge of the connecting portion 40 by a fourth distance s4.

The first spacing s1 to the fourth spacing s4, the width w22 of the extension section 22, the width w31 of the first radiating part 31 and the width w32 of the second radiating part 32 respectively have certain size requirements. To achieve impedance matching between the first spacing s1 to the fourth spacing s4 , the extension section 22 , the first radiating part 31 and the second radiating part 32 , the feed part 33 can be used to achieve impedance matching. The electromagnetic waves mutually transmit or interact with the first radiating part 31 and the second radiating part 32 to oscillate the frequency bands of 2.4GHz~2.5GHz and 5GHz~6GHz. In practice, the multi-frequency printed antenna 100 is disposed on the electronic device with a metal casing. placed inside, such as the inside of a metal shell computer, where the first spacing s1 is 0.7 mm, the second spacing s2 is 1 mm, the third spacing s3 is 0.9 mm, and the fourth spacing s4 is 2 mm , the width w22 of the extension section 22 is 9.7 mm, the width w31 of the first radiating part 31 is 5.3 mm, and the width w32 of the second radiating part 32 is 5.1 mm.

In this embodiment, in order to fix the circuit carrier board 10 inside the electronic device, and because various electronic components (such as hard drives or switches) inside the electronic device may interfere with antenna reception, Therefore, the position of the clearance area 50 on the right half of the circuit carrier board 10 can correspond to the various electronic components mentioned above, so that the radiation field pattern of the multi-frequency printed antenna 100 becomes more circular, thereby improving the multi-frequency printed antenna. The stability of the antenna 100 during operation. The circuit carrier board 10 is provided with a plurality of screw holes v1 to v3. The circuit carrier board 10 is fixed inside the electronic device by screws being locked in the screw holes v1 to v3.

When the multi-frequency printed antenna 100 of the present invention is used for wireless communication, the current is fed from the feeding part 33, and the frequency range that the current can oscillate through is 5GHz~6GHz through the first radiating part 31, and at the same time, the current passes through the second radiation The frequency band that part 32 can oscillate is 2.4GHz~2.5GHz. The extension section 22 is coupled with the first radiating part 31 , thereby extending the bandwidth of the oscillated frequency band of 5 GHz to 6 GHz. The multi-band printed antenna 100 of this invention can increase the frequency bands it can provide in a limited space.

Please refer to the second figure for the Voltage Standing Wave Ratio (VSWR) of the multi-band printed antenna 100 of this creation. Test chart. When the multi-frequency printed antenna 100 of the present invention operates at 2.4GHz, the voltage standing wave ratio is 2.1571 (M1 in the figure). When the multi-frequency printed antenna 100 of the present invention operates at 2.44GHz, the voltage standing wave ratio is 1.8057 (M2 in the figure). ), when the multi-frequency printed antenna 100 of the present invention operates at 2.48GHz, the voltage standing wave ratio is 1.4815GHz (M3 in the figure), when the multi-frequency printed antenna 100 of the present invention operates at 5.2GHz, the voltage standing wave ratio is 1, 6905 (M4 in the figure), when the multi-frequency printed antenna 100 of the present invention operates at 5.8GHz, the voltage standing wave ratio is 2.4050 (M5 in the figure). Therefore, the multi-band printed antenna 100 of the present invention can stably operate in the frequency range of 2.4GHz ~ 2.5GHz and 5GHz ~ 6GHz. Based on the above voltage standing wave ratio, it can be calculated that the multi-band printed antenna 100 of the present invention operates in the frequency range of 2.4GHz~2.5GHz and 5GHz~6GHz, and the reflection loss of the bandwidth is approximately within -10dB, indicating that the multi-band printed antenna 100 of the present invention operates in the frequency range of 2.4GHz~2.5GHz and 5GHz~6GHz. The loss degree of the printed antenna 100 is small, and the radiation energy of the multi-frequency printed antenna 100 is large.

表一

Table I

Please refer to the third figure and Table 1 for the efficiency diagram and data table of the multi-band printed antenna 100 of this invention. Basically, when the antenna operates 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 2.4GHz~2.5GHz and 5GHz~6GHz is approximately 50%. Therefore, the multi-frequency printed antenna 100 of the present invention can operate in the working frequency band in a limited space. Achieve high efficiency and maintain a certain level of performance.

To sum up, the multi-band printed antenna 100 of the present invention can increase the frequency bands provided in a limited space, and can work stably inside an electronic device with a metal casing, adapting to the development trend of miniaturization of electronic products.

Although this case has been disclosed as above through embodiments, it is not intended to limit this case. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of this case. Therefore, the protection of this case The scope shall be determined by the appended patent application scope.

100:Multi-frequency printed antenna

10:Circuit carrier board

20: Ground body

21: Grounding part

22: Extension section

30:radiator

31:First Radiation Department

32:Second Radiation Department

33: Feeding Department

40:Connection part

50: Clearance area

s1: first spacing

s2: second spacing

s3: third spacing

s4: fourth spacing

v1~v3: screw hole

w22,w31,w32:width

Claims (3)

A multi-band printed antenna containing: a circuit carrier board; A grounding body provided on the left part of the circuit carrier board; a radiator disposed in the middle part of the circuit carrier board and separated from the ground body; and A connecting part, the connecting part extends to the right from the lower part of the right edge of the ground body and is connected to the bottom of the radiator; wherein The ground body is provided with a ground portion and an extension section extending from an upper portion of the right edge of the ground portion and extending toward the top of the radiator, and the extension section is stepped; The radiator is provided with a first radiating part, a second radiating part extending linearly from the lower part of the right edge of the first radiating part to the right, and a second radiating part extending from the lower part of the left edge of the first radiating part to the left. An extended feed-in part, the first radiation part is in the shape of a longitudinal strip, the second radiation part is in the shape of a transverse strip, the feed-in part is provided on the extension section, the ground part and the connecting part within the enclosed space. The multi-band printed antenna according to claim 1, wherein the right edge of the extension section is separated from the left edge of the first radiating part by a first distance, and the upper side edge of the feed part is separated from the lower edge of the extension section. The side edges are separated by a second distance, the left edge of the feed-in part is separated by a third distance from the right edge of the ground part, and the lower side edge of the feed-in part is separated by a fourth distance from the upper side edge of the connection. The multi-frequency printed antenna according to claim 1, wherein the circuit carrier board is provided with at least one screw hole.