CN112186334B - Multi-frequency antenna module - Google Patents

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 end and a first grounding end. The first radiator is connected to the main radiator for coupling out the first frequency band. The second radiator is connected to the main radiator for coupling out the second frequency band. The third radiator is connected to the main radiator for coupling out a third frequency band. The fourth radiator is located beside the main radiator for coupling out a fourth frequency band and is provided with 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 form a three-dimensional structure.

Description

Multi-Band Antenna Module

technical field

The invention relates to an antenna module, in particular to a multi-frequency antenna module.

Background technique

At present, multi-frequency antennas are usually arranged on a substrate in a planar form. With the advancement of technology, the size of electronic products is becoming thinner and smaller. The combination of multi-frequency antennas and substrates will occupy more internal space of electronic products, making it difficult to reduce the size of electronic products.

Contents of the invention

The invention provides a multi-frequency antenna module, which can couple out multiple frequency bands and is arranged along the outline of the housing to save space.

A multi-frequency antenna module of the present invention is suitable for being arranged on a housing, and the multi-frequency antenna module includes a main radiator, a first radiator, a second radiator, a third radiator and a fourth radiator. The main radiator has a feeding end and a first grounding end. The first radiator is connected to the main radiator for coupling out the first frequency band. The second radiator is connected to the main radiator for coupling out the second frequency band. The third radiator is connected to the main radiator for coupling out the third frequency band. The fourth radiator is located next to the main radiator for coupling out the fourth frequency band and has a second ground terminal, wherein the main radiator, the first radiator, the second radiator, the third radiator and the fourth radiator are suitable for Distributed along the outline of the shell to present a three-dimensional structure.

In an embodiment of the present invention, the above-mentioned casing 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 branches, and the feed-in end and the first ground end are respectively located at the two branches. Above, the feeding end and the first grounding end are adapted to be located on the bottom surface, and the two branches have a plurality of bends and are adapted to extend from the bottom surface to the top surface along at least one of the side surfaces.

In an embodiment of the present invention, the above-mentioned casing has a top surface and a side surface, and the first radiator has a bend and is suitable for extending from the top surface to the side surface.

In an embodiment of the present invention, the above-mentioned casing has a plurality of sides, and a part of the first radiator on one of the sides resonates to the first frequency band.

In an embodiment of the present invention, the above-mentioned casing has a plurality of side surfaces, the first radiator has an end connected to the main radiator, and the first radiator has a third radiator adapted to be respectively located on three of the side surfaces. A widened section, a second widened section and a third widened section, the width of the first widened section, the second widened section and the third widened section is greater than the width of the end portion.

In an embodiment of the present invention, the above-mentioned housing has a plurality of sides, and the second radiator has a first section and a second section that are bent and connected to each other, and is suitable for being disposed on two of these sides. superior.

In an embodiment of the present invention, the width of the above-mentioned first section is greater than the width of the second section.

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

In an embodiment of the present invention, the above-mentioned casing 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 radiator has a plurality of bends and is suitable for passing through at least one of these side surfaces from the bottom surface. Both extend to the top surface.

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

Based on the above, the multi-frequency 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 multiple frequency bands. In addition, the multi-frequency antenna module of the present invention is suitable for being distributed along the outline of the casing to present a three-dimensional structure, which can effectively save space.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

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

FIG. 2 is a schematic diagram of another perspective of FIG. 1 .

FIG. 3 and FIG. 4 are schematic diagrams hiding the housing of FIG. 1 and FIG. 2 .

FIG. 5 is a schematic diagram of another viewing angle of FIG. 1 .

FIG. 6 is a schematic diagram of 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 Frequency-S11 when the multi-frequency antenna module of FIG. 1 is connected in series with variable capacitors.

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

FIG. 9 is a schematic diagram of another viewing angle of FIG. 8 .

Explanation of reference numbers:

10: Shell

11: bottom surface

12: top surface

13: Notch

14a, 14b, 14c: Slopes

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

100, 100a: multi-frequency antenna module

110: main radiator

112, 114: branch

Sections 111, 1122～1126, 1142～1146

116: Feed-in terminal

118: The first ground terminal

120, 120a: first radiator

121: end

122～127: section

125a: first widening section

126a: second widening section

127a: The third widening section

130, 130a: second radiator

132, 132a: first section

134, 134a: second section

140: Third radiator

150, 150a: the fourth radiator

151~155, 153a~155a: sections

156: Second ground terminal

160: variable capacitance

Detailed ways

FIG. 1 is a schematic diagram of a multi-frequency antenna module disposed on a housing according to an embodiment of the present invention. FIG. 2 is a schematic diagram of another perspective of FIG. 1 . FIG. 3 and FIG. 4 are schematic diagrams hiding the housing of FIG. 1 and FIG. 2 . FIG. 5 is a schematic diagram of another viewing angle of FIG. 1 . Please refer to FIG. 1 to FIG. 5, the multi-frequency antenna module 100 of this embodiment can be applied in, for example, a driving recorder, a digital video recorder (Digital video recorder, DVR), a vehicle Internet of Things (Internet of Things, IoT) or It is on the mobile phone, which can upload the information of the electronic device to the cloud system. Of course, the application of the multi-frequency antenna module 100 is not limited thereto.

In this embodiment, the multi-frequency antenna module 100 is suitable to be disposed on the casing 10 . As can be seen from Figures 1 and 2, in this embodiment, the housing 10 has a top surface 12, a plurality of inclined surfaces (only a part of the inclined surfaces 14a, 14b, 14c are marked) and a plurality of side surfaces 15a, 15b, 15c, 15d, 15e , 15f. Furthermore, it can be seen from FIG. 5 that the housing 10 has a bottom surface 11 . These slopes 14 a , 14 b , 14 c and these side surfaces 15 a , 15 b , 15 c , 15 d , 15 e , 15 f are located between the bottom surface 11 and the top surface 12 .

In this embodiment, the shape of the casing 10 is irregular. For example, these side surfaces 15a, 15b, 15c, 15d, 15e, and 15f of the casing 10 form a three-dimensional shape close to an arc or a semicircle. The shape of 10 is not limited thereto. In an embodiment, the housing 10 may also have a three-dimensional shape with a partial 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 current electronic products is getting smaller and smaller, in this embodiment, the multi-frequency antenna module 100 is directly arranged on these surfaces of the housing 10 as the contours of these surfaces are bent, so as to reduce the The space occupied by the electronic product can also be well applied to the casing 10 with an irregular shape, thereby providing a good multi-frequency effect. The structure of the multi-frequency antenna module 100 of this embodiment will be described below.

As shown in Figure 1, in this embodiment, the multi-frequency antenna module 100 (Figure 3) includes a main radiator 110, a first radiator 120, a second radiator 130, a third radiator 140 and a fourth radiator 150 . In this 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 The outline distribution of the surface 12 and these side surfaces 15a, 15b, 15c, 15d, 15e, 15f presents a three-dimensional structure.

In detail, in this embodiment, it can be seen from FIG. 3 that the main radiator 110 includes a section 111 and two branches 112 and 114 connected to the section 111. The two branches 112 and 114 have multiple bends and are suitable for The bottom surface 11 ( FIG. 5 ) extends to the top surface 12 along at least one of these side surfaces 15a, 15b, 15c, 15d, 15e, 15f.

Specifically, the two branches 112, 114 have segments 1122, 1142 (FIG. 5) on the bottom surface 11 (FIG. 5), segments 1124, 1144 (FIG. 3) on the side 15e, and regions on the slope 14b. Sections 1126, 1146 (FIG. 3). Sections 1126 , 1146 are connected to section 111 on top surface 12 . As shown in FIG. 5 , the main radiator 110 has a feeding end 116 and a first grounding end 118 . The feeding end 116 and the first grounding end 118 are respectively located on the two sections 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 multiple bends and is adapted to extend from the top surface 12 to the side. More specifically, it can be seen in FIG. 3 that the first radiator 120 is connected to the section 111 of the main radiator through an end 121, the first radiator 120 has a section 122 configured on the top surface 12 (FIG. 1), The segment 123 arranged on the slope 14a ( FIG. 1 ) of the housing 10 ( FIG. 1 ) and the segments 124 , 125 , 126, 127.

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

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

As shown in FIG. 4 , in this embodiment, the second radiator 130 is connected to the main radiator 110 and has a first section 132 and a second section 134 that are bent and connected to each other. The first segment 132 and the second segment 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 is 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 ). The second section 134 is L-shaped and extends toward (downward) the bottom surface 11 ( FIG. 1 ) at the end.

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

In addition, as shown in FIG. 4 , in this embodiment, the third radiator 140 is connected to the main radiator 110 , and the third radiator 140 is suitable for being disposed on the top surface 12 ( FIG. 1 ). In this embodiment, the shape of the third radiator 140 is close to a zigzag shape with two turns, but the shape of the third radiator 140 is not limited thereto. The third radiator 140 is used for coupling out the third frequency band. The length of the third radiator 140 is, for example, 1/4 wavelength of the third frequency band. The third frequency band is, for example, high frequency, and the frequency band is 2.3 GHz to 2.69 GHz, but the third frequency band is not limited thereto.

As shown in FIG. 4 , in this embodiment, the fourth radiator 150 is located beside the main radiator 110 . The fourth radiator 150 has a plurality of bends and is adapted to extend from the bottom surface 11 ( FIG. 5 ) to the top surface 12 ( FIG. 2). Specifically, the fourth radiator 150 includes a segment 151 located on the bottom surface 11 ( FIG. 5 ), a segment 152 located on the side 15e ( FIG. 2 ), a segment 153 located on the side 15f ( FIG. 2 ), and a segment 153 located on the side 15f ( FIG. 2 ). Section 154 on slope 14c (FIG. 2) and section 155 on top surface 12 (FIG. 2).

In this embodiment, the fourth radiator 150 has a second ground terminal 156 located on the section 151 . Section 152 is L-shaped and extends to the right. Section 153 is perpendicular to section 154 with an inflection. The fourth radiator 150 extends to the top surface 12 ( FIG. 2 ) of the housing 10 ( FIG. 2 ) through the section 155 to avoid the metal outside the housing 10 (such as surrounding the sides 15a, 15b, 15c, 15d of the housing 10 , 15e, 15f (FIG. 2) outside the metal casing (not shown)) interference, and the antenna efficiency can be improved.

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

In addition, please return to FIG. 1. In this embodiment, the housing 10 has a notch 13 for disposing internal metal parts (not shown), and the configuration of the multi-frequency antenna module 100 on the outer surface of the housing 10 can also avoid Shielding of antenna signals by internal metal parts.

It is worth mentioning that, as shown in FIG. 5 , in this embodiment, the multi-frequency antenna module 100 may optionally include a variable capacitor 160 electrically connected to the feeding end 116 . The variable capacitor 160 can be changed between 0.1 pF and 0.8 pF, for example, to adjust the impedance matching, so as to increase the bandwidth or shift the frequency band. Of course, the capacitance range of the variable capacitor 160 is not limited thereto.

Since the frequency bands stipulated by different countries are slightly different, the antenna efficiency requirements of the same frequency band are also different. The multi-frequency antenna module 100 of this embodiment can write a specific capacitance value in the variable capacitor 160 to respond to different countries. Specification. For example, the manufacturer can set the variable capacitor 160 of the product to be sold to country A as a capacitance value (for example, written in software), so that the frequency band coupled by the multi-frequency antenna module 100 of this product Conforms to the specifications of country A. The manufacturer can also set the variable capacitor 160 of the product to be sold in country B to b capacitance value for country B, so that the frequency band coupled by the multi-frequency antenna module 100 of this product meets the specification of country B. In this way, the hardware structure of the multi-frequency antenna module 100 of these products sold to different countries can be the same, without producing different versions of hardware for different countries.

FIG. 6 is a schematic diagram of 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 Frequency-S11 when the multi-frequency antenna module of FIG. 1 is connected in series with variable capacitors. Please refer to Figure 6 and Figure 7. It can be seen from the comparison of the two figures that in Figure 6, the low frequency is between 824MHz and 894MHz. It can be seen from FIG. 7 that when the multi-frequency antenna module 100 is connected in series with the variable capacitor 160 , the bandwidth of the low frequency is increased to between 703 MHz and 960 MHz, and the effect of broadband can be achieved.

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

FIG. 8 is a schematic diagram of a multi-frequency antenna module according to another embodiment of the present invention. FIG. 9 is a schematic diagram of another viewing angle of FIG. 8 . Please refer to FIG. 8 and FIG. 9, the main difference between the multi-frequency antenna module 100a of this embodiment and the multi-frequency antenna module 100 of FIG. 1 is that in this embodiment, the first radiator 120a has a first widening section 125a , the second widened section 126 a and the third widened section 127 a , the widths of the first widened section 125 a , the second widened section 126 a and the third widened section 127 a are greater than the width of the end portion 121 .

In addition, as shown in FIG. 9 , in this embodiment, the width of the first section 132a of the second radiator 130a is greater than the width of the second section 134a. Compared with the multi-frequency antenna module 100 in FIG. 4 , the sections 153 a , 154 a , and 155 a of the fourth radiator 150 a in this embodiment are also widened. In this embodiment, the designer can widen a partial section of the first radiator 120 a , the second radiator 130 a and/or the fourth radiator 150 a to achieve the effect of frequency modulation.

In summary, the multi-frequency 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 multiple frequency bands. In addition, the multi-frequency antenna module of the present invention is suitable for being distributed along the bottom surface, the top surface and the contours of these side surfaces of the casing to present a three-dimensional structure, which can effectively save space.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention should be defined by the claims.

Claims (8)

1. A multi-frequency antenna module is suitable for being configured in a housing, wherein the multi-frequency antenna module comprises: The main radiator has a feeding end and a first grounding end; a first radiator, connected to the main radiator, for coupling out the first frequency band; a second radiator, connected to the main radiator, for coupling out a second frequency band; a third radiator, connected to the main radiator, for coupling out a third frequency band; and The fourth radiator, located next to the main radiator, is used to couple out the fourth frequency band, and has a second ground terminal, wherein the main radiator, the first radiator, the second radiator, the The third radiator and the fourth radiator are adapted to be distributed along the outline of the casing to present a three-dimensional structure, and the casing has a bottom surface, a top surface, and a The main radiator has two branches, the feeding end and the first grounding end are respectively located on the two branches, the feeding end and the first grounding end are suitable for being located on the The bottom surface, the two branches have a plurality of bends and are suitable for extending from the bottom surface along at least one of the plurality of sides to the top surface, and the first radiator has a bend and is suitable for extending from the top surface to the side surface. 2. The multi-frequency antenna module according to claim 1, wherein the housing has multiple sides, and the first radiator resonates to the first frequency band at a position on one of the sides . 3. The multi-frequency antenna module according to claim 1, wherein the housing has multiple sides, the first radiator has an end connected to the main radiator, and the first radiator The body has a first widened section, a second widened section and a third widened section adapted to be respectively located on three of the plurality of sides, the first widened section, the first widened section The widths of the second widening section and the third widening section are greater than the width of the end portion. 4. The multi-frequency antenna module according to claim 1, wherein the housing has a plurality of side surfaces, and the second radiator has a first section and a second section that are bent and connected to each other , suitable for being arranged on two of the plurality of sides. 5. The multi-frequency antenna module according to claim 4, wherein the width of the first section is greater than the width of the second section. 6 . The multi-frequency antenna module according to claim 1 , wherein the housing has a top surface, and the third radiator is adapted to be disposed on the top surface. 7. The multi-frequency antenna module according to 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, and the fourth radiator There are a plurality of bends adapted to extend from the bottom surface to the top surface through at least two of the plurality of sides. 8. The multi-frequency antenna module according to claim 1, further comprising a variable capacitor electrically connected to the feeding end.

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