TWM601907U - Directional antenna - Google Patents

Abstract

A directional antenna includes: a substrate, a first antenna, a second antenna and an isolation part. The substrate is a multilayer board, and the substrate includes at least a first layer board and a second layer board: the first antenna is disposed on the first layer board and the second layer board, and the first antenna includes a A first reflector, a first radiator and a plurality of first directors; the second antenna is arranged on the first layer board and the second layer board, the first antenna includes a second reflector, a A second radiator and a plurality of second directors; and the isolation part is arranged on the first layer board and the second layer board, and is located between the first antenna and the second antenna. This structure achieves the purpose of improving the directivity of the antenna, and the arrangement of the isolation part reduces the mutual interference of the two antennas and improves the consistency of the main beam directions of the two antennas.

Description

Directional antenna

This creation is about an antenna, especially a directional antenna.

The antenna structure of the current smart glasses, such as the Republic of China Patent Publication No. I589950 "Glasses Type Communication Device", the antenna is a coupling-type monopole antenna, including a radiating part, a parasitic part and a matching part. The antenna is operated in the 2.4GHz band and the 5GHz band.

Another example is the People's Republic of China Patent Publication No. CN110635223 "A 4G-MIMO Smart Glasses Antenna", which uses a loop antenna and monopole antenna structure to cover the 4G low frequency band 824~960MHz and 4G high frequency band 1710~2690MHz.

However, with the advent of the 5G era, many electronic devices are equipped with antenna structures capable of receiving 5G signals. As mentioned above, the antenna structure of current smart glasses has not yet integrated 5G technology. Furthermore, limited by the volume and weight requirements of smart glasses, it is necessary to develop an antenna structure that is small in size, suitable for wearable electronic devices, and has high frequency bandwidth, high speed, and low delay characteristics.

Therefore, how to improve the above problem is the technical difficulty that the creator of this case wants to solve.

In view of the above, this creation is to solve and improve the existing Problems and deficiencies are the purpose.

In order to achieve the above objectives, this invention provides a directional antenna, which includes: a substrate, a first antenna, a second antenna, and an isolation part. The substrate is a multi-layer board, the substrate includes at least a first layer board and a second layer board; the first antenna is arranged on the first layer board and the second layer board, and the first antenna includes a A first reflector, a first radiator and a plurality of first directors; the second antenna is arranged on the first layer board and the second layer board, the first antenna includes a second reflector, a A second radiator and a plurality of second directors; and the isolation part is arranged on the first layer board and the second layer board, and is located between the first antenna and the second antenna.

Preferably, the first radiator includes a first feeding portion and a second feeding portion, the first feeding portion is provided on the first layer board, and the second feeding portion is provided on the second layer board.

Preferably, the second radiator includes a third feeding portion and a fourth feeding portion, the third feeding portion is provided on the first layer board, and the fourth feeding portion is provided on the second layer board.

Preferably, there is a second distance between the first feeding portion and the second feeding portion and does not overlap each other.

Preferably, the third feeding portion and the fourth feeding portion have a second distance between them and do not overlap each other.

Preferably, the first reflector, the first radiator and the first guides are metal conductors printed on the substrate.

Preferably, the second reflector, the second radiator and the second guides are metal conductors printed on the substrate.

Preferably, the first radiator is formed between the first reflector and the first guides.

Preferably, the second radiator is formed between the second reflector and the second guides.

Preferably, the substrate is provided with a plurality of through holes, and the plurality of through holes penetrate the substrate.

This creation uses the structure to achieve the purpose of improving the directivity of the antenna, and also through the arrangement of the isolation part, to reduce the mutual interference of the two antennas and improve the consistency of the main beam directions of the two antennas.

[This creation]

1: substrate

11: First layer board

12: Second layer board

13: The third layer board

14: The fourth layer board

2: The first antenna

21: The first reflector

22: The first radiator

221: The first feeding part

222: The second feeding part

23: The first director

3: second antenna

31: second reflector

32: second radiator

321: The third feeding part

322: The fourth feeding part

33: second director

4a: Isolation Department

4b: Isolation Department

5: Through hole

S1: first spacing

S2: second spacing

S3: third spacing

S4: fourth spacing

The first picture is the front of the creative directional antenna.

The second is the side of the directional antenna of this creation.

The third picture is an exploded view of the creative directional antenna.

The third diagram A is a schematic diagram of the second pitch.

The fourth figure is the frequency-reflection coefficient relationship diagram of the creative directional antenna.

The fifth figure is the radiation pattern of the second antenna of the creative directional antenna.

The sixth figure is the radiation pattern of the first antenna of the creative directional antenna.

In order to make it easier for your examiner to understand the other features and advantages of this creation and the effects achieved by it more clearly, I would like to combine this creation with the attached drawings. The detailed description is as follows:

Please refer to the first and second figures. The present invention provides a directional antenna, which includes: a substrate 1, a first antenna 2, a second antenna 3, and an isolation portion 4a, 4b.

The substrate 1 is in the shape of a flat plate. The substrate 1 can be a printed circuit board (PCB) or a metal structure board, which can be made of insulating materials such as plastic, glass fiber, and bakelite, and can be coated on it Or electroplating metal conductors such as silver and copper to form the antenna structure. In this embodiment, the substrate 1 is a printed circuit board (PCB), and the substrate 1 is a multi-layer board. Each layer is composed of a dielectric layer (epoxy resin, glass fiber) and a high-purity conductor layer (copper foil). The structure of the printed circuit board is formed by the above, and the dielectric layer is hollow. However, since the structure of the printed circuit board is a conventional technology, it will not be repeated in this embodiment.

Please refer to the third figure, the substrate 1 is a multilayer board, the substrate 1 includes at least a first layer 11 and a second layer 12, and the multilayer board may include first to Nth layers stacked in sequence Structure, N can be a positive integer greater than two. In this embodiment, the number of layers of the multilayer board is four, including the first layer 11, the second layer 12, a third layer 13 and a fourth layer 14. In terms of function, the first layer board 11 and the second layer board 12 are component layers, which are used to set the antenna wiring and electronic components. The third layer board 13 and the fourth layer board 14 are power sources respectively. Layer and ground layer. The substrate 1 can be selected from RO4350B and RO4450F high-frequency circuit boards manufactured by Rogers Corporation, but not limited to the above-mentioned circuit board models, and suitable circuit boards can be selected according to actual needs. The above is only for example description.

Please continue to refer to the first and second diagrams (refer to the third diagram in conjunction), the first antenna 2 is provided on the first layer 11 and the second layer 12, the first antenna 2 includes a first reflector 21, a first radiator 22, and a plurality of first guides 23. The first antenna 2 may be a printed Yagi antenna, and the first reflector 21, the first radiator 22 and the first guides 23 are metal conductors printed on the substrate 1.

The first reflector 21 is disposed on the substrate 1, the first reflector 21 is a metal conductor, and the first reflector 21 can be elongated. The first radiator 22 is disposed on the substrate 1, and there is a first distance S1 between the first radiator 22 and the first reflector 21. The first radiator 22 includes a first feeding portion 221 and a The second feeding portion 222, the first feeding portion 221 is provided on the first layer board 11. The second feeding portion 222 is provided on the second layer board 12. The first feeding portion 221 and the second feeding portion 222 have a second distance S2 and do not overlap each other (as shown in the third diagram A). The first radiator 22 may be a printed dipole antenna, and the lateral length of the first radiator 22 is smaller than the lateral length of the first reflector 21.

The first guides 23 are located at one side of the first radiator 22, there is a third distance S3 between the first guides 23 and the first radiator 22, and the first guides 23 are There is a fourth distance S4, and the lateral length of the first guides 23 is smaller than the lateral length of the first radiator 22. The first reflector 21, the first radiator 22, and the first guides 23 are sequentially arranged on the substrate 1 in the same direction. Moreover, the first radiator 22 is formed between the first reflector 21 and the first guides 23.

The second antenna 3 is disposed on the first layer 11 and the second layer 12, and the second antenna 3 includes a second reflector 31, a second radiator 32, and a plurality of second directors 33 . The second antenna 3 may be a printed Yagi antenna, and the second reflector 31, the second radiator 32 and the second guides 33 are metal conductors printed on the substrate 1.

The second reflector 31 is disposed on the substrate 1, the second reflector 31 is a metal conductor, and the second reflector 31 can be elongated. The second radiator 32 is disposed on the substrate 1, the first distance S1 is between the second radiator 32 and the second reflector 31, and the second radiator 32 includes a third feeding portion 321 and a The fourth feeding portion 322, the third feeding portion 321 is provided on the first layer board 11, and the fourth feeding portion 322 is provided on the second layer board 12. The third feeding portion 321 and the fourth feeding portion 322 have the second distance S2 between them and do not overlap each other. The second radiator 32 may be a printed dipole antenna, and the lateral length of the second radiator 32 is smaller than the lateral length of the second reflector 31.

The second guides 33 are located at one side of the second radiator 32, and the second guides 33 and the second radiator 32 have the third distance S3, and each of the second guides 33 has the fourth distance S4, and the lateral length of the second guides 33 is smaller than the second The lateral length of the radiator 32. The second reflector 31, the second radiator 32 and the second guides 33 are sequentially arranged on the substrate 1 in the same direction. Moreover, the second radiator 32 is formed between the second reflector 31 and the second guides 33.

The above-mentioned intervals include the first interval S1, the second interval S2, the third interval S3, and the fourth interval S4, which can be determined according to actual requirements.

The isolation portion 4 a is provided on the first layer board 11, and the isolation portion 4 b is provided on the second layer board 12 and is located between the first antenna 2 and the second antenna 3. The isolating portion 4a and the isolating portion 4b are elongated and connected by a plurality of through holes 5 (Via), such as circular holes as shown, and it should be noted that the arrangement of the plurality of through holes 5 should not affect the The wiring of the first antenna 2 and the second antenna 3. Since the substrate 1 is a multilayer board, the substrate 1 needs to be provided with the plurality of through holes 5, the plurality of through holes 5 penetrate the multilayer board, and the plurality of through holes 5 block the first antenna 2 and the The antenna wave of the second antenna 3 rebounds to the ground layer of the substrate 1 to isolate the rebounding antenna wave like a fence, and also has the function of impedance matching (Iimpedance Matching). The isolation portions 4a, 4b are used to isolate the mutual interference between the first antenna 2 and the second antenna 3 and improve the consistency of the main beam directions of the two antennas.

It is worth mentioning that the number of the first guides 23 and the second guides 33 can be adjusted according to actual requirements to adjust the directivity of the directional antenna.

Please refer to the fourth figure, which shows the frequency-reflection coefficient (Reflection Coefficient) relationship diagram of the directional antenna. From the frequency-reflection coefficient relationship diagram, it can be seen that the reflection coefficient of the directional antenna at 57~64GHz frequency can reach -10dB or less, and the directional antenna can be applied to the ISM band of 57~64GHz. The ISM band refers to Industrial science and medicine without licenses or fees Use frequency band (Industrial Scientific Medical Band, ISM Band for short).

Please refer to the fifth and sixth figures, which show the radiation pattern of the directional antenna. The fifth figure is the radiation pattern of the first antenna, and the sixth figure is the radiation pattern of the second antenna. As shown in the figure, the maximum realized gain of the directional antenna is about 6dBi, and the half power beam width (HPBW) of the directional antenna is about 55 degrees.

Therefore, the directional antenna has two sets of Yagi antennas (that is, the first antenna 2 and the second antenna 3) arranged on the substrate 1, so that the directional antenna is suitable for wearable electronics such as smart glasses. On the equipment, the structure of the Yagi antenna has high directivity. At the same time, the directional antenna is also suitable for the 57~64GHz ISM frequency band to meet the new application requirements created by 5G communication technology and achieve the characteristics of high bandwidth, high speed and low delay. Moreover, the isolation portions 4a, 4b can improve the interference problem between the antennas, avoid the mutual influence between the first antenna 2 and the second antenna 3, and improve the consistency of the main beam directions of the two antennas.

In summary, the directional antenna has the following advantages:

1. Small size, suitable for wearable electronic equipment.

2. It is suitable for 57~64GHz ISM frequency band.

3. High frequency bandwidth, high speed, low latency.

4. Improve the interference problem between the two antennas and improve the consistency of the main beam directions of the two antennas.

5. High directivity.

The above discussion is only a preferred embodiment of this creation, and is not intended to limit the scope of implementation of this creation; therefore, any equivalent shape, structure or combination transformation made without departing from the spirit and scope of this creation should Covered in the scope of patent application for this creation.

1: substrate

11: First layer board

12: Second layer board

13: The third layer board

14: The fourth layer board

2: The first antenna

21: The first reflector

22: The first radiator

221: The first feeding part

222: The second feeding part

23: The first director

3: second antenna

31: second reflector

32: second radiator

321: The third feeding part

322: The fourth feeding part

33: second director

4a: Isolation Department

4b: Isolation Department

5: Through hole

Claims (10)

A directional antenna, which includes: A substrate is a multilayer board, and the substrate includes at least a first layer and a second layer; A first antenna arranged on the first layer board and the second layer board, the first antenna including a first reflector, a first radiator and a plurality of first directors; A second antenna disposed on the first layer board and the second layer board, the second antenna including a second reflector, a second radiator and a plurality of second directors; and An isolation part is arranged on the first layer board and the second layer board, and is located between the first antenna and the second antenna. According to the directional antenna described in claim 1, wherein the first radiator includes a first feeding portion and a second feeding portion, the first feeding portion is provided on the first layer board, and the second feeding portion The entrance is arranged on the second layer board. According to the directional antenna described in claim 1, wherein the second radiator includes a third feeding portion and a fourth feeding portion, the third feeding portion is provided on the first layer board, and the fourth feeding portion The entrance is arranged on the second layer board. According to the directional antenna described in item 2 of the scope of patent application, the first feeding portion and the second feeding portion have a second distance and do not overlap each other. According to the directional antenna described in item 3 of the scope of patent application, the third feeding portion and the fourth feeding portion have a second distance and do not overlap each other. According to the directional antenna described in claim 1, wherein the first reflector, the first radiator and the first guides are metal conductors printed on the substrate. The directional antenna described in item 1 of the scope of patent application, wherein the second reflector, the second The radiator and the second guides are metal conductors printed on the substrate. According to the directional antenna described in claim 1, wherein the first radiator is formed between the first reflector and the first directors. According to the directional antenna described in claim 1, wherein the second radiator is formed between the second reflector and the second directors. According to the directional antenna described in item 1 of the scope of patent application, the substrate is provided with a plurality of through holes, and the plurality of through holes penetrate the substrate.

Images