CN112186334A

CN112186334A - Multi-frequency antenna module

Info

Publication number: CN112186334A
Application number: CN201910593835.5A
Authority: CN
Inventors: 刘建昇
Original assignee: Askey Technology Jiangsu Ltd; Askey Computer Corp
Current assignee: Askey Technology Jiangsu Ltd; Askey Computer Corp
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2021-01-05
Anticipated expiration: 2039-07-03
Also published as: CN112186334B

Abstract

The invention provides a multi-frequency antenna module which is suitable for being configured on a shell and comprises a main radiator, a first radiator, a second radiator, a third radiator and a fourth radiator. The main radiator has a feed-in terminal and a first grounding terminal. The first radiator is connected to the main radiator and used for coupling out the first frequency band. The second radiator is connected to the main radiator and used for coupling out a second frequency band. The third radiator is connected to the main radiator and used for coupling out a third frequency band. The fourth radiator is located beside the main radiator, is used for coupling out a fourth frequency band, and has a second grounding end, wherein the main radiator, the first radiator, the second radiator, the third radiator and the fourth radiator are suitable for being distributed along the outline of the shell to present a three-dimensional structure.

Description

Multi-frequency antenna module

Technical Field

The present invention relates to an antenna module, and more particularly, to a multi-band antenna module.

Background

Currently, a multi-frequency antenna is generally configured on a substrate in a planar form. With the development of technology, the size of electronic products is becoming thinner and smaller, and the matching of the multi-frequency antenna and the substrate occupies more internal space of the electronic products, so that the size of the electronic products is difficult to be reduced.

Disclosure of Invention

The invention provides a multi-frequency antenna module which can be coupled out of multiple frequency bands and is arranged along the outline of a shell, so that the space is saved.

The invention relates to a multi-frequency antenna module which is suitable for being configured on a shell. The main radiator has a feed-in terminal and a first grounding terminal. The first radiator is connected to the main radiator and used for coupling out the first frequency band. The second radiator is connected to the main radiator and used for coupling out a second frequency band. The third radiator is connected to the main radiator and used for coupling out a third frequency band. The fourth radiator is located beside the main radiator, is used for coupling out a fourth frequency band, and has a second grounding end, wherein the main radiator, the first radiator, the second radiator, the third radiator and the fourth radiator are suitable for being distributed along the outline of the shell to present a three-dimensional structure.

In an embodiment of the invention, the housing has a bottom surface, a top surface and a plurality of side surfaces located between the bottom surface and the top surface, the main radiator has two branch portions, the feeding end and the first ground end are respectively located on the two branch portions, the feeding end and the first ground end are suitable for being located on the bottom surface, and the two branch portions have a plurality of bends and are suitable for extending from the bottom surface to the top surface along at least one of the side surfaces.

In an embodiment of the invention, the housing has a top surface and a side surface, and the first radiator has a bend adapted to extend from the top surface to the side surface.

In an embodiment of the invention, the housing has a plurality of side surfaces, and a portion of the first radiator on one of the side surfaces resonates with the first frequency band.

In an embodiment of the invention, the housing has a plurality of side surfaces, the first radiator has an end portion connected to the main radiator, the first radiator has a first widened portion, a second widened portion and a third widened portion, which are respectively located on three of the side surfaces, and widths of the first widened portion, the second widened portion and the third widened portion are greater than a width of the end portion.

In an embodiment of the invention, the housing has a plurality of side surfaces, and the second radiator has a first section and a second section connected to each other in a bent manner, and is adapted to be disposed on two of the side surfaces.

In an embodiment of the invention, a width of the first section is greater than a width of the second section.

In an embodiment of the invention, the third radiator is adapted to be disposed on the top surface.

In an embodiment of the invention, the housing has a bottom surface, a top surface and a plurality of side surfaces located between the bottom surface and the top surface, and the fourth radiation body has a plurality of bends adapted to extend from the bottom surface to the top surface through at least two of the side surfaces.

In an embodiment of the invention, the multi-frequency antenna module further includes a variable capacitor electrically connected to the feeding terminal.

In view of the above, the multi-band antenna module of the present invention has a main radiator, a first radiator, a second radiator, a third radiator, and a fourth radiator, and can couple out multiple frequency bands. In addition, the multi-frequency antenna module of the invention is suitable for being distributed along the outline of the shell to present a three-dimensional structure, thereby effectively saving space.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic diagram of a multi-frequency antenna module disposed on a housing according to an embodiment of the invention.

Fig. 2 is a schematic view of another perspective of fig. 1.

Fig. 3 and 4 are schematic views for hiding the housing of fig. 1 and 2.

Fig. 5 is a schematic view of another perspective of fig. 1.

Fig. 6 is a schematic diagram of the frequency-S11 when the multi-frequency antenna module of fig. 1 is not connected in series with a variable capacitor.

Fig. 7 is a schematic diagram of the frequency-S11 when the multi-frequency antenna module of fig. 1 is connected in series with a variable capacitor.

Fig. 8 is a schematic diagram of a multi-frequency antenna module according to another embodiment of the invention.

Fig. 9 is a schematic view of another perspective of fig. 8.

The reference numbers illustrate:

10: shell body

11: bottom surface

12: the top surface

13: notch (S)

14a, 14b, 14 c: inclined plane

15a, 15b, 15c, 15d, 15e, 15 f: side surface

100. 100 a: multi-frequency antenna module

110: main radiator

112. 114: branch part

111. 1122 to 1126, 1142 to 1146 sections

116: feed-in terminal

118: first ground terminal

120. 120 a: first radiator

121: end part

122 to 127: segment of

125 a: first widened section

126 a: second widened section

127 a: third widened section

130. 130 a: second radiator

132. 132 a: the first section

134. 134 a: second section

140: third radiator

150. 150 a: a fourth radiator

151 to 155, 153a to 155 a: segment of

156: second ground terminal

160: variable capacitance

Detailed Description

Fig. 1 is a schematic diagram of a multi-frequency antenna module disposed on a housing according to an embodiment of the invention. Fig. 2 is a schematic view of another perspective of fig. 1. Fig. 3 and 4 are schematic views for hiding the housing of fig. 1 and 2. Fig. 5 is a schematic view of another perspective of fig. 1. Referring to fig. 1 to 5, the multi-band antenna module 100 of the present embodiment may be applied to a driving recorder, a Digital Video Recorder (DVR), an Internet of Things (IoT) for a vehicle, or a mobile phone, for example, and may upload information of an electronic device to a cloud system. Of course, the application of the multi-frequency antenna module 100 is not limited thereto.

In the present embodiment, the multi-frequency antenna module 100 is adapted to be disposed on the housing 10. As shown in fig. 1 and 2, in the present embodiment, the housing 10 has a top surface 12, a plurality of inclined surfaces (only some of the

inclined surfaces

14a, 14b, 14c are indicated), and a plurality of

side surfaces

15a, 15b, 15c, 15d, 15e, 15 f. Furthermore, as can be seen from fig. 5, the housing 10 has a bottom surface 11. The

inclined surfaces

14a, 14b, 14c and the side surfaces 15a, 15b, 15c, 15d, 15e, 15f are located between the bottom surface 11 and the top surface 12.

In the present embodiment, the shape of the housing 10 is irregular, for example, the side surfaces 15a, 15b, 15c, 15d, 15e, and 15f of the housing 10 are assembled to form a three-dimensional shape close to an arc or a semicircle, but the shape of the housing 10 is not limited thereto. In an embodiment, the housing 10 may also be a three-dimensional shape with a partial circular arc, or the housing 10 may also be a combination of polygons or a regular shape (such as a common polygon).

Since the size of the electronic product is smaller and smaller, in the embodiment, the multi-frequency antenna module 100 is directly disposed on the surfaces of the housing 10 along with the bending of the contours of the surfaces, so as to reduce the space occupied by the multi-frequency antenna module 100 in the electronic product, and can be well applied to the housing 10 with an irregular shape, thereby providing a good multi-frequency effect. The structure of the multi-frequency antenna module 100 of the present embodiment will be explained below.

As shown in fig. 1, in the present embodiment, the multi-frequency antenna module 100 (fig. 3) includes a main radiator 110, a first radiator 120, a second radiator 130, a third radiator 140, and a fourth radiator 150. In the present embodiment, the main radiator 110, the first radiator 120, the second radiator 130, the third radiator 140 and the fourth radiator 150 are suitable for being distributed along the outline of the bottom surface 11 (fig. 5), the top surface 12 and the side surfaces 15a, 15b, 15c, 15d, 15e and 15f of the casing 10 to present a three-dimensional structure.

In detail, in the present embodiment, as shown in fig. 3, the main radiator 110 includes a section 111 and two

branches

112 and 114 connected to the section 111, and the two

branches

112 and 114 have a plurality of bends and are adapted to extend from the bottom surface 11 (fig. 5) to the top surface 12 along at least one of the side surfaces 15a, 15b, 15c, 15d, 15e, and 15 f.

Specifically, the two

branches

112, 114 have sections 1122, 1142 (fig. 5) on the bottom surface 11 (fig. 5), sections 1124, 1144 (fig. 3) on the side surface 15e, and sections 1126, 1146 (fig. 3) on the inclined surface 14 b. The

sections

1126, 1146 are connected to the section 111 on the top surface 12. As shown in fig. 5, the main radiator 110 has a feeding terminal 116 and a first ground terminal 118. The feeding terminal 116 and the first ground terminal 118 are respectively located on the two

segments

1122, 1142 and located on the bottom surface 11 of the housing 10.

In addition, as shown in fig. 1, the first radiator 120 has a plurality of bends adapted to extend from the top surface 12 to the side surface. More specifically, as shown in fig. 3, the first radiator 120 is connected to the section 111 of the main radiator through the end 121, and the first radiator 120 has a section 122 disposed on the top surface 12 (fig. 1), a section 123 disposed on the inclined surface 14a (fig. 1) of the housing 10 (fig. 1), and

sections

124, 125, 126, 127 disposed on the side surfaces 15a, 15b, 15c (fig. 1) of the housing 10 (fig. 1).

In the present embodiment, the first radiator 120 is configured to couple out the first frequency band. The length of the first radiator 120 is, for example, 1/4 wavelengths of the first frequency band. In this embodiment, the first frequency band is, for example, a low frequency band, and the frequency band is 824MHz to 894MHz, but the first frequency band is not limited thereto.

In addition, in the present embodiment, the section 125 of the first radiator 120 on the side surface 15a can be used to help resonate low frequency. Of course, in other embodiments, the shape of the first radiator 120 is not limited thereto.

As shown in fig. 4, in the present embodiment, the second radiator 130 is connected to the main radiator 110 and has a first section 132 and a second section 134 connected to each other in a bent manner. The first section 132 and the second section 134 are adapted to be disposed on two of the

sides

15a, 15b, 15c, 15d, 15e, 15f (fig. 1) of the housing 10 (fig. 1). Specifically, the first section 132 is connected to the section 1144 of the main radiator and located on the side surface 15d (fig. 1), and the extending direction of the first section 132 is perpendicular to the extending direction of the section 1144. The second section 134 is located on the side surface 15c (fig. 1), and the second section 134 is L-shaped and extends in a direction (downward) toward the bottom surface 11 (fig. 1) at the end.

In this embodiment, the second radiator 130 is configured to couple out the second frequency band. The length of the second radiator 130 is, for example, 1/4 wavelengths of the second frequency band. The second frequency band is, for example, a part of the intermediate frequency, and the frequency band is 1.71GHz to 1.88GHz, but the second frequency band is not limited thereto.

In addition, as shown in fig. 4, in the present embodiment, the third radiator 140 is connected to the main radiator 110, and the third radiator 140 is suitably disposed on the top surface 12 (fig. 1). In the present embodiment, the shape of the third radiator 140 is close to a zigzag shape and has two turns, but the shape of the third radiator 140 is not limited thereto. The third radiator 140 is configured to couple out a third frequency band. The length of the third radiator 140 is, for example, 1/4 wavelengths of the third frequency band. The third frequency band is, for example, a high frequency band ranging from 2.3GHz to 2.69GHz, but the third frequency band is not limited thereto.

As shown in fig. 4, in the present embodiment, the fourth radiator 150 is located beside the main radiator 110. The fourth radiator 150 has a plurality of bends adapted to extend from the bottom surface 11 (fig. 5) to the top surface 12 (fig. 2) through at least two of the side surfaces 15a, 15b, 15c, 15d, 15e, 15f (fig. 2). Specifically, the fourth radiator 150 includes a section 151 located on the bottom surface 11 (fig. 5), a section 152 located on the side surface 15e (fig. 2), a section 153 located on the side surface 15f (fig. 2), a section 154 located on the inclined surface 14c (fig. 2), and a section 155 located on the top surface 12 (fig. 2).

In the present embodiment, the fourth radiator 150 has a second ground terminal 156 located on the segment 151. The section 152 is L-shaped and extends to the right. Segment 153 is perpendicular to segment 154 and has a turn. The fourth radiator 150 extends to the top surface 12 (fig. 2) of the housing 10 (fig. 2) through the section 155, so that metal outside the housing 10 (such as a metal casing (not shown) surrounding the side surfaces 15a, 15b, 15c, 15d, 15e, 15f (fig. 2) of the housing 10) can be prevented from interfering, and the antenna efficiency can be improved.

The fourth radiator 150 is configured to couple out the fourth frequency band. The length of the fourth radiator 150 is, for example, 1/4 wavelengths in the fourth frequency band. The fourth frequency band is another part of the intermediate frequency, for example, the frequency band is 1.99GHz to 2.17GHz, but the fourth frequency band is not limited thereto.

In addition, referring back to fig. 1, in the embodiment, the housing 10 has a recess 13 for disposing an internal metal part (not shown), and the multi-frequency antenna module 100 is disposed on an outer surface of the housing 10 to prevent the internal metal part from shielding the antenna signal.

It should be noted that, as shown in fig. 5, in the present embodiment, the multi-frequency antenna module 100 further optionally includes a variable capacitor 160 electrically connected to the feeding terminal 116. The variable capacitor 160 can be varied between 0.1pF to 0.8pF, for example, to adjust impedance matching, to increase bandwidth, or to shift frequency band. Of course, the capacitance range of the variable capacitor 160 is not limited thereto.

Since the frequency bands specified in different countries are slightly different, and the antenna performance requirements of the same frequency band are also different, the multi-band antenna module 100 of the present embodiment can meet the specifications of different countries by writing a specific capacitance value into the variable capacitor 160. For example, the manufacturer can set the capacitance a (e.g., written in software) of the variable capacitor 160 of the product to be sold in country a, so that the frequency band coupled by the multi-band antenna module 100 of the product conforms to the specification of country a. The manufacturer can also set the B-capacitance value of the variable capacitor 160 of a product to be sold in country B, so that the frequency band coupled by the multi-band antenna module 100 of the product conforms to the specification of country B. As a result, the hardware structure of the multi-band antenna module 100 sold to different countries can be the same, and different versions of hardware do not need to be produced for different countries.

Fig. 6 is a schematic diagram of the frequency-S11 when the multi-frequency antenna module of fig. 1 is not connected in series with a variable capacitor. Fig. 7 is a schematic diagram of the frequency-S11 when the multi-frequency antenna module of fig. 1 is connected in series with a variable capacitor. Referring to fig. 6 and 7, as can be seen from comparison of the two figures, in fig. 6, the low frequency is between 824MHz and 894 MHz. As shown in fig. 7, when the multi-band antenna module 100 is connected in series to the variable capacitor 160, the low frequency bandwidth is increased to 703MHz to 960MHz, and the effect of wide band can be achieved.

In addition, when the multi-band antenna module 100 is connected in series with the variable capacitor 160, the antenna has a smaller S11 value in the middle frequency range, especially 1990MHz to 2170MHz, and thus has better antenna efficiency. In addition, when the multi-band antenna module 100 is connected in series with the variable capacitor 160, the band of high frequency (between 2300MHz and 2690 MHz) is shifted to the right.

Fig. 8 is a schematic diagram of a multi-frequency antenna module according to another embodiment of the invention. Fig. 9 is a schematic view of another perspective of fig. 8. Referring to fig. 8 and 9, a main difference between the multi-band antenna module 100a of the present embodiment and the multi-band antenna module 100 of fig. 1 is that in the present embodiment, the first radiator 120a has a first widened section 125a, a second widened section 126a and a third widened section 127a, and widths of the first widened section 125a, the second widened section 126a and the third widened section 127a are greater than a width of the end portion 121.

In addition, as shown in fig. 9, in the present embodiment, the width of the first section 132a of the second radiator 130a is greater than the width of the second section 134 a. Compared to the multi-frequency antenna module 100 of fig. 4, the

sections

153a, 154a, 155a of the fourth radiator 150a of the present embodiment are also widened. In the present embodiment, the designer may widen a partial section of the first radiator 120a, the second radiator 130a and/or the fourth radiator 150a to achieve the frequency modulation effect.

In summary, the multi-band antenna module of the present invention has a main radiator, a first radiator, a second radiator, a third radiator, and a fourth radiator, and can couple out multiple frequency bands. In addition, the multi-frequency antenna module of the invention is suitable for being distributed along the outline of the bottom surface, the top surface and the side surfaces of the shell to present a three-dimensional structure, thereby effectively saving space.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A multi-frequency antenna module adapted to be disposed in a housing, the multi-frequency antenna module comprising:

a main radiator having a feed-in terminal and a first ground terminal;

the first radiator is connected to the main radiator and used for coupling out a first frequency band;

the second radiator is connected to the main radiator and used for coupling out a second frequency band;

the third radiator is connected to the main radiator and used for coupling out a third frequency band; and

and a fourth radiator, disposed beside the main radiator, for coupling out a fourth frequency band, and having a second ground, wherein the main radiator, the first radiator, the second radiator, the third radiator, and the fourth radiator are adapted to be distributed along a contour of the housing to form a three-dimensional structure.

2. The multi-band antenna module of claim 1, wherein the housing has a bottom surface, a top surface, and a plurality of side surfaces between the bottom surface and the top surface, the main radiator has two branches, the feeding end and the first ground end are respectively located on the two branches, the feeding end and the first ground end are adapted to be located on the bottom surface, and the two branches have a plurality of bends adapted to extend from the bottom surface to the top surface along at least one of the side surfaces.

3. The multi-frequency antenna module of claim 1, wherein the housing has a top surface and side surfaces, and the first radiator has a bend adapted to extend from the top surface to the side surfaces.

4. The multi-band antenna module of claim 1, wherein the housing has a plurality of sides, and wherein the first radiator is resonant to the first frequency band at a location on one of the sides.

5. The multi-frequency antenna module of claim 1, wherein the housing has a plurality of sides, the first radiator has an end connected to the main radiator, the first radiator has a first widened section, a second widened section, and a third widened section adapted to be located on three of the plurality of sides, respectively, the first widened section, the second widened section, and the third widened section having widths greater than widths of the end.

6. The multi-band antenna module of claim 1, wherein the housing has a plurality of sides, and wherein the second radiator has a first section and a second section connected to each other in a meander manner, adapted to be disposed on two of the plurality of sides.

7. The multi-frequency antenna module of claim 6, wherein a width of the first section is greater than a width of the second section.

8. The multi-frequency antenna module of claim 1, wherein the housing has a top surface, the third radiator being adapted to be disposed on the top surface.

9. The multi-frequency antenna module of claim 1, wherein the housing has a bottom surface, a top surface, and a plurality of side surfaces between the bottom surface and the top surface, the fourth radiator having a plurality of bends adapted to extend from the bottom surface to the top surface through at least two of the plurality of side surfaces.

10. The multi-frequency antenna module of claim 1, further comprising a variable capacitor electrically connected to the feed terminal.