TWI879075B - Antenna module and electronic device - Google Patents

Abstract

An antenna module includes a first radiating body and a second radiating body. The first radiating body includes a first segment, a second segment, a third segment and a fourth segment which are connected in sequence. A feeding terminal is located between the first segment and the second segment. A first slot is formed between the second segment and the fourth segment. The second radiating body includes a fifth segment, a sixth segment, a seventh segment, and an eighth segment which are connected in sequence. A hole is encircled by the fifth segment, the sixth segment, the seventh segment, and the eighth segment, and the fifth segment is separated from the eighth segment. A second slot is formed between the first segment and the sixth segment, the second segment and the sixth segment, and the third segment and the sixth segment. The third slot is formed between the fourth segment and the eighth segment. The first radiating body, the second radiating body, the first slot, the second slot and the third slot jointly couple a low frequency band and a high frequency band.

Description

Antenna modules and electronic devices

The present invention relates to an antenna module and an electronic device, and in particular to an antenna module with good antenna performance and an electronic device with a relatively complete metal back cover.

The frames of existing laptops or tablet devices tend to be narrower and narrower, but this design limits the placement of the antenna module. In conventional designs, if a slot-type antenna is used, the antenna slot will be set on the back cover of the laptop screen or the side of the host case, or the back cover of the tablet device, but such a design will cause holes in the exterior surface, affecting the aesthetics. Therefore, how to make the antenna module have good antenna performance and the electronic device have a complete appearance when the antenna module is set on the electronic device with a narrow frame is the direction that this field is committed to exploring.

The present invention provides an antenna module having good antenna performance.

The present invention provides an electronic device, which includes the above antenna module and has a metal back cover with a relatively complete appearance.

An antenna module of the present invention includes a first radiator and a second radiator. The first radiator includes a first section, a second section, a third section and a fourth section connected in sequence, wherein a feed end is located between the first section and the second section, and a first slot is formed between the second section and the fourth section. The second radiator includes a fifth section, a sixth section, a seventh section and an eighth section connected in sequence, wherein the fifth section, the sixth section, the seventh section and the eighth section surround a hole, the first radiator is located in the hole, and the fifth section and the eighth section are separated. A second slot is formed between the first section and the sixth section, between the second section and the sixth section, and between the third section and the sixth section, and a third slot is formed between the fourth section and the eighth section. The first radiator, the second radiator, the first slot, the second slot and the third slot jointly couple out a low frequency band and a high frequency band.

An electronic device of the present invention includes a metal back cover and an antenna module. The metal back cover includes a back plate and a side wall rising from the back plate, and the back plate and the side wall do not have antenna slots. The antenna module is connected to the side wall and parallel to the back plate, and includes a first radiator and a second radiator. The first radiator includes a first section, a second section, a third section and a fourth section connected in sequence, wherein a feed end is located between the first section and the second section, and a first slot is formed between the second section and the fourth section. The second radiator includes a fifth section, a sixth section, a seventh section and an eighth section connected in sequence, wherein the fifth section, the sixth section, the seventh section and the eighth section surround a hole, the first radiator is located in the hole, and the fifth section and the eighth section are separated. A second slot is formed between the first section and the sixth section, between the second section and the sixth section, and between the third section and the sixth section, and a third slot is formed between the fourth section and the eighth section. The first radiator, the second radiator, the first slot, the second slot, and the third slot jointly couple out a low frequency band and a high frequency band.

In an embodiment of the present invention, the high frequency band includes a first high frequency sub-band, and the first segment, a first part of the sixth segment and the corresponding segment in the second slot are coupled together to form the first high frequency sub-band.

In an embodiment of the present invention, the high frequency band includes a second high frequency sub-band, and the first radiator, the second radiator and the second slot jointly couple out the low frequency band and the second high frequency sub-band.

In an embodiment of the present invention, the high frequency band includes a third high frequency sub-band, and a second portion of the second segment, the third segment, and the sixth segment corresponding to the segment in the second slot are coupled together to produce the third high frequency sub-band.

In one embodiment of the present invention, the low frequency band is 2400-2484 MHz, and the high frequency band is 5150-7125 MHz.

In an embodiment of the present invention, the electronic device further comprises a plate, wherein the metal back cover comprises an extended inner plate extending laterally inward from the side wall, the extended inner plate comprises a second radiator and a hole, the plate is located in the hole, and the first radiator is disposed on the plate.

In an embodiment of the present invention, the electronic device further comprises a plate, wherein the plate is arranged to extend inwardly from the side wall and is parallel to the back plate, the first radiator and the second radiator are arranged on the plate, and the second radiator is connected to the side wall.

Based on the above, the antenna module of the present invention includes a first radiator and a second radiator, the second radiator surrounds a hole, and the first radiator is located in the hole. In addition, a first slot is formed on the first radiator, and a second slot and a third slot are formed between the first radiator and the second radiator. The antenna module couples out a low frequency band and a high frequency band through the first radiator, the second radiator, the first slot, the second slot, and the third slot. Such a design enables the antenna module to have good antenna performance. In addition, the back plate and side wall of the metal back cover of the electronic device of the present invention do not have antenna slots, and the antenna module is connected to the side wall and parallel to the metal back cover, so that the electronic device has a more complete metal back cover and an antenna module with good antenna performance.

Fig. 1 is a schematic top view of an electronic device according to an embodiment of the present invention. Fig. 2 is a cross-sectional side view of the electronic device of Fig. 1 along line A-A. It should be noted that in order to clearly illustrate the antenna module 120 in Fig. 1, the middle and bottom of the electronic device 100 are omitted in Fig. 1.

1 and 2, the electronic device 100 of the present invention is, for example, a notebook computer or a tablet device, and includes a metal back cover 110 and an antenna module 120. The metal back cover 110 is, for example, a top cover of a notebook computer or a back cover of a tablet device, and includes a back plate 111 and a side wall 112 rising from the back plate 111 as shown in FIG2, and the back plate 111 and the side wall 112 do not have antenna slots.

In this embodiment, the metal back cover 110 is a full metal back cover, but not limited thereto. In addition, in this embodiment, the back plate 111 and the side wall 112 do not have antenna slots, but the back plate 111 and the side wall 112 may be provided with other holes such as heat dissipation holes.

On the other hand, in this embodiment, the side wall 112 is perpendicular to the back plate 111, that is, the back plate 111 is parallel to the XY plane, and the side wall 112 is parallel to the XZ plane, but the relative relationship between the back plate 111 and the side wall 112 is not limited to this. In addition, in this embodiment, the distance between the plate 130 and the back plate 111 in the Z-axis direction is 5 mm, but it is not limited to this.

Please continue to refer to FIG. 1 and FIG. 2 . The electronic device 100 further includes a plate 130 . The metal back cover 110 includes an extended inner plate 113 extending laterally inward from the side wall 112 . The extended inner plate 113 includes a hole 1131 ( FIG. 1 ). The plate 130 is located in the hole 1131 and is locked to the side wall 112 through a screw hole S3 ( FIG. 3 ).

In this embodiment, the extended inner plate 113 and the metal back cover 110 are formed in one piece, but the relationship between the extended inner plate 113 and the metal back cover 110 is not limited thereto. In addition, in this embodiment, the plate 130 and the extended inner plate 113 are parallel to the back plate 111, the length and width of the hole 1131 are 36 mm x 4 mm, and the length, width and height of the plate 130 are 36 mm x 4 mm x 0.4 mm, but the dimensions of the hole 1131 and the plate 130 are not limited thereto.

Please continue to refer to FIG. 1 . The electronic device 100 is provided with two antenna modules 120 . The two antenna modules 120 are respectively provided at different positions of the metal back cover 110 , such as the left and right sides. In this embodiment, there are two antenna modules 120 , but the number of antenna modules 120 is not limited thereto. The antenna module 120 on the left side of FIG. 1 is described below.

FIG3 is a partial enlarged schematic diagram of the electronic device of FIG1. Referring to FIG3, the antenna module 120 is connected to the side wall 112 and is parallel to the back plate 111 (FIG2). The antenna module 120 includes a first radiator 121 and a second radiator 122. The first radiator 121 is disposed on the plate 130, and the extended inner plate 113 includes a portion of the second radiator 122. In this embodiment, the shape of the first radiator 121 is C-shaped, but the shape of the first radiator 121 is not limited thereto.

Specifically, the extended inner plate 113 of the electronic device 100 includes a portion of the second radiator 122 and a hole 1131. The plate 130 is provided with the first radiator 121 and is disposed in the hole 1131. Such a design allows the hole 1131 to serve as an antenna slot of the antenna module 120 and allows the radiation energy of the antenna module 120 to be concentrated in the positive direction of the Z axis. In addition, in this embodiment, the plate 130 is a circuit board and a portion of the first radiator 121 and the second radiator 122 are printed on the plate 130, but the type of the plate 130 is not limited thereto. In other examples, the plate 130 may also be a flexible printed circuit (FPC), or a bracket or an insulating plate having an LDS (Laser Direct Structuring) antenna.

It is worth mentioning that, since the hole 1131 is located on the non-exterior surface of the electronic device 100, such a design allows the metal back cover 110 of the electronic device 100 to maintain integrity, thereby improving the aesthetic effect and the yield rate during manufacturing. In other words, under the above configuration, the antenna module 120 can be applied to the electronic device 100 with a narrow frame, and the electronic device 100 can have a metal back cover with a more complete appearance.

Please continue to refer to FIG. 3 , the first radiator 121 includes a first section 1211 (path area from position A1 to feeding end F), a second section 1212 (path area from feeding end F to position A2), a third section 1213 (path area from position A2 to positions A3 and A4 in sequence), and a fourth section 1214 (path area from position A4 to position A5) which are sequentially connected. A first slot C1 is formed between the second section 1212 and the fourth section 1214.

The feed end F of the antenna module 120 is located between the first section 1211 and the second section 1212, and is electrically connected to the first radiator 121 and the signal positive end of the coaxial transmission line 10 to transmit the signal to the first radiator 121. On the other hand, the ground end G of the antenna module 120 is electrically connected to the signal negative end of the coaxial transmission line 10 to connect the antenna module 120 to the system ground plane. In addition, the ground end G is further connected to the metal back cover 110 through the screw hole S3, so that the antenna module 120 has a good grounding environment.

The second radiator 122 includes a fifth section 1221 (path area from position G1 to position B6), a sixth section 1222 (path area from position B6 to positions B5, B4, B1, B2, B3 in sequence), a seventh section 1223 (path area from position B3 to position G2), and an eighth section 1224 (path area from position G2 to position G3) which are connected in sequence. The fifth section 1221, the sixth section 1222, the seventh section 1223, and the eighth section 1224 surround the hole 1131, the first radiator 121 is located in the hole 1131, and the fifth section 1221 and the eighth section 1224 are separated. A second slot C2 is formed between the first section 1211 and the sixth section 1222 , between the second section 1212 and the sixth section 1222 , and between the third section 1213 and the sixth section 1222 . A third slot C3 is formed between the fourth section 1214 and the eighth section 1224 .

The antenna module 120 couples a low frequency band and a high frequency band through the first radiator 121, the second radiator 122, the first slot C1, the second slot C2 and the third slot C3. In this embodiment, the low frequency band is 2400~2484MHz, which is suitable for WiFi 2.4G, and the high frequency band is 5150~7125MHz, which is suitable for WiFi 5G, WiFi 6E and WiFi 7.

It should be noted that the high frequency band includes a first high frequency sub-band, a second high frequency sub-band and a third high frequency sub-band. The generation and adjustment mechanisms of the low frequency band, the first high frequency sub-band, the second high frequency sub-band and the third high frequency sub-band will be described below.

The first section 1211, a first portion P1 of the sixth section 1222 (the path area from position B1 to positions B2 and B3 in sequence) and the corresponding section in the second slot C2 are coupled together to produce a first high-frequency sub-band. In this embodiment, the first high-frequency sub-band is 5150-5900 MHz. The antenna module 120 can adjust the frequency landing position and impedance matching bandwidth of the first high-frequency sub-band by adjusting the length and width of the first section 1211.

The first radiator 121, the second radiator 122 and the second slot C2 jointly couple out a low frequency band and a second high frequency sub-band. In this embodiment, the second high frequency sub-band is 5900-6800 MHz. The antenna module 120 can adjust the frequency landing position of the low frequency band by adjusting the length and width of the fourth section 1214.

The second section 1212, the third section 1213, and a second portion P2 of the sixth section 1222 (the path area from position B1 to positions B4, B5, and B6 in sequence) and the corresponding section in the second slot C2 are coupled together to produce a third high-frequency sub-band. In this embodiment, the third high-frequency sub-band is 6800-7300 MHz. The antenna module 120 can adjust the frequency landing position and impedance matching bandwidth of the third high-frequency sub-band by adjusting the length and width of the second section 1212 and the third section 1213.

In addition, the antenna module 120 can increase the impedance matching bandwidth of the first high-frequency sub-band, the second high-frequency sub-band, and the third high-frequency sub-band through the third slot C3 between the fourth section 1214 and the eighth section 1224.

FIG. 4 is a partially enlarged schematic diagram of an electronic device according to another embodiment of the present invention. It should be noted that the difference between the electronic device 100a of FIG. 4 and the electronic device 100 of FIG. 3 is that the first radiator 121 and the second radiator 122 of the electronic device 100a of FIG. 4 are arranged on a plate 130a, and the second radiator 122 is connected to the side wall 112. In this embodiment, the plate 130a is a circuit board with a length and width of 40 mm x 6 mm, and is locked to the side wall 112 through screw holes S1-S3. The electronic device 100a replaces the extended inner plate 113 of the electronic device 100 shown in FIG. 1 by arranging a larger plate 130a. Such a design enables the electronic device 100a to have the same antenna structure, performance and a more complete metal back cover as the electronic device 100, and can reduce the weight of the electronic device 100a.

Fig. 5 is a frequency-VSWR relationship diagram of the antenna module of Fig. 3. Referring to Fig. 5, in this embodiment, the VSWR of the antenna module 120 in the low frequency band 2400-2484 MHz and the high frequency band 5150-7125 MHz is less than 3, and has good antenna performance.

FIG6 is a frequency-VSWR relationship diagram of the antenna module of FIG3 with different widths. It should be noted that two antenna modules 120 with a width of 5 mm in the Y-axis direction are respectively disposed on the left and right sides of the narrow-frame electronic device 100, and two antenna modules 120 with a width of 6 mm in the Y-axis direction are respectively disposed on the left and right sides of the narrow-frame electronic device 100. Referring to FIG6, in this embodiment, whether the antenna module 120 has a width of 5 mm or 6 mm, its VSWR in the low frequency band 2400~2484MHz and the high frequency band 5150~7125MHz is less than 3, and has good antenna performance.

FIG7 is a frequency-isolation relationship diagram of the antenna module of FIG3 with different widths. Referring to FIG7, whether the antenna module 120 has a width of 5 mm or 6 mm, its isolation in the low frequency band 2400~2484MHz and the high frequency band 5150~7125MHz is less than -20dB, and has good isolation performance.

FIG8 is a frequency-efficiency relationship diagram of the antenna module of FIG3 with different widths. Referring to FIG8 , in this embodiment, the antenna module 120 with a width of 6 mm has an efficiency of -5.6 to -7.0 dBi in the low frequency band 2400 to 2484 MHz and an efficiency of -1.9 to -4.5 dBi in the high frequency band 5150 to 7125 MHz. The antenna module 120 with a width of 5 mm has an efficiency of -6.7 to -8.5 dBi in the low frequency band 2400 to 2484 MHz and an efficiency of -1.6 to -4.0 dBi in the high frequency band 5150 to 7125 MHz. Regardless of whether the antenna module 120 has a width of 6 mm or 5 mm, it has good antenna efficiency.

In summary, the antenna module of the present invention includes a first radiator and a second radiator, the second radiator surrounds a hole, and the first radiator is located in the hole. In addition, a first slot is formed in the first radiator, and a second slot and a third slot are formed between the first radiator and the second radiator. The antenna module couples out a low frequency band and a high frequency band through the first radiator, the second radiator, the first slot, the second slot, and the third slot. Such a design enables the antenna module to have good antenna performance. In addition, the back plate and the side wall of the metal back cover of the electronic device of the present invention do not have antenna slots. The electronic device is connected to the side wall through the antenna module and is parallel to the metal back cover, and the hole of the extended inner plate is used as the antenna slot of the antenna module. Such a design enables the electronic device to have a more complete metal back cover and an antenna module with good antenna performance.

10: coaxial transmission line 100, 100a: electronic device 110: metal back cover 111: back plate 112: side wall 113: extended inner plate 120: antenna module 121: first radiator 122: second radiator 130, 130a: plate 1131: hole 1211: first section 1212: second section 1213: third section 1214: fourth section 1221: fifth section 1222: sixth section 1223: seventh section 1224: eighth section A1~A5, B1~B6, G1~G3: position C1: first slot C2: second slot C3: third slot F: Feed terminal G: Ground terminal P1: First part P2: Second part S1~S3: Screw holes X, Y, Z: Axis

FIG. 1 is a schematic top view of an electronic device according to an embodiment of the present invention. FIG. 2 is a cross-sectional side view of the electronic device of FIG. 1 along the A-A line segment. FIG. 3 is a partially enlarged schematic view of the electronic device of FIG. 1. FIG. 4 is a partially enlarged schematic view of an electronic device according to another embodiment of the present invention. FIG. 5 is a frequency-VSWR relationship diagram of the antenna module of FIG. 3. FIG. 6 is a frequency-VSWR relationship diagram of the antenna module of FIG. 3 with different widths. FIG. 7 is a frequency-isolation relationship diagram of the antenna module of FIG. 3 with different widths. FIG. 8 is a frequency-efficiency relationship diagram of the antenna module of FIG. 3 with different widths.

10: Coaxial transmission line

100: Electronic devices

110:Metal back cover

112: Side wall

113: Extended inner panel

120: Antenna module

121: The First Radiant

122: The Second Radiant

130: Panels

1131: Hole

1211: First paragraph

1212: Second paragraph

1213: The third paragraph

1214: The fourth paragraph

1221: The fifth paragraph

1222: Paragraph 6

1223: Paragraph 7

1224: The eighth paragraph

A1~A5, B1~B6, G1~G3: Location

C1: First groove seam

C2: Second groove seam

C3: The third groove

F: Feeding end

G: Ground terminal

P1: Part 1

P2: Part 2

S3: Screw hole

X, Y, Z: axial direction

Claims (11)

An antenna module comprises: A first radiator, comprising a first section, a second section, a third section and a fourth section connected in sequence, wherein a feed end is located between the first section and the second section, and a first slot is formed between the second section and the fourth section; and A second radiator, comprising a fifth section, a sixth section, a seventh section and an eighth section connected in sequence, wherein the fifth section, the sixth section, the seventh section and the eighth section surround a hole, the first radiator is located in the hole, the fifth section and the eighth section are separated, a second slot is formed between the first section and the sixth section, between the second section and the sixth section and between the third section and the sixth section, and a third slot is formed between the fourth section and the eighth section, The first radiator, the second radiator, the first slot, the second slot and the third slot jointly couple out a low frequency band and a high frequency band. An antenna module as described in claim 1, wherein the high-frequency band includes a first high-frequency sub-band, and the first segment, a first part of the sixth segment and the corresponding segment in the second slot are coupled together to produce the first high-frequency sub-band. The antenna module as described in claim 1, wherein the high-frequency band includes a second high-frequency sub-band, and the first radiator, the second radiator and the second slot jointly couple out the low-frequency band and the second high-frequency sub-band. An antenna module as described in claim 1, wherein the high-frequency band includes a third high-frequency sub-band, and the second section, the third section, and a second part of the sixth section corresponding to the section in the second slot are coupled together to produce the third high-frequency sub-band. The antenna module as described in claim 1, wherein the low frequency band is 2400~2484MHz and the high frequency band is 5150~7125MHz. An electronic device, comprising: A metal back cover, comprising a back plate and a side wall rising from the back plate, wherein the back plate and the side wall have no antenna slots; An antenna module, connected to the side wall and parallel to the back plate, the antenna module comprising: A first radiator, comprising a first section, a second section, a third section and a fourth section connected in sequence, wherein a feed end is located between the first section and the second section, and a first slot is formed between the second section and the fourth section; and A second radiator includes a fifth section, a sixth section, a seventh section and an eighth section connected in sequence, wherein the fifth section, the sixth section, the seventh section and the eighth section surround a hole, the first radiator is located in the hole, the fifth section and the eighth section are separated, a second slot is formed between the first section and the sixth section, between the second section and the sixth section and between the third section and the sixth section, and a third slot is formed between the fourth section and the eighth section. The first radiator, the second radiator, the first slot, the second slot and the third slot jointly couple a low frequency band and a high frequency band. An electronic device as described in claim 6, wherein the high-frequency band includes a first high-frequency sub-band, and the first segment, a first part of the sixth segment and the corresponding segment in the second slot are coupled together to produce the first high-frequency sub-band. An electronic device as described in claim 6, wherein the high-frequency band includes a second high-frequency sub-band, and the first radiator, the second radiator and the second slot jointly couple out the low-frequency band and the second high-frequency sub-band. An electronic device as described in claim 6, wherein the high-frequency band includes a third high-frequency sub-band, and the second section, the third section, and a second part of the sixth section corresponding to the section in the second slot are coupled together to produce the third high-frequency sub-band. The electronic device as described in claim 6 further includes a plate, wherein the metal back cover includes an extended inner plate extending laterally inward from the side wall, the extended inner plate includes the second radiator and the hole, the plate is located in the hole, and the first radiator is disposed on the plate. The electronic device as described in claim 6 further includes a plate, wherein the plate is arranged to extend laterally inward from the side wall and is parallel to the back plate, the first radiator and the second radiator are arranged on the plate, and the second radiator is connected to the side wall.

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