TW201947818A - Communication apparatus - Google Patents

Abstract

A communication apparatus is provided. A planar inverted F antenna is disposed next to a pivot structure of the communication device, and a resonance mode of a high-frequency band is generated by a first slit formed by a grounding element, a first ground plane and a radiating element.

Description

Communication device

The invention relates to an electronic device, and in particular to a communication device.

Because metal casings have the advantages of high strength, good heat dissipation, and increased appearance design, more and more communication devices (such as tablet computers, notebook computers, and mobile phones) use metal material casings. However, the metal environment formed by the housing of the communication device often affects the performance of the antenna element. For example, the coupling effect between the metal casing of the communication device and the antenna element can form an equivalent capacitance, and the formed equivalent capacitance often results in a decrease in the radiation efficiency of the antenna, thereby reducing the wireless communication quality of the communication device. Existing all-metal backed antenna designs on the market. In order to maintain the antenna's radiation efficiency, they are generally damaged in appearance to allow the antenna to have sufficient headroom to radiate. For example, the design of slotted antennas, then This may destroy the design aesthetics of the product.

The invention provides a communication device, which can make the antenna have good antenna efficiency without damaging the appearance of the communication device.

The communication device of the present invention includes a first body, a second body, a pivot structure, and a flat inverted F antenna. The first body and the second body are relatively rotated through the pivot structure. The planar inverted-F antenna is arranged beside the pivot structure. The planar inverted-F antenna includes a radiating member, a feeding member, and a grounding member. The first end of the radiator is an open end, and the first end of the radiator is separated from the first ground plane by a first distance to generate a capacitive effect with the first ground plane. The first end of the feeding member is connected to the second end of the radiating member, and the second end of the feeding member has a feeding point, and the feeding point is used to receive a feeding signal. The first end of the grounding member is connected to the radiation member, the second end of the grounding member is connected to the first ground plane, and the feeding member passes from the feeding point through the first end of the radiation member, the first end of the grounding member, and the first end of the second end. The resonance path operates in the first frequency band and operates in the second frequency band through the second resonance path. The grounding member is disposed between the radiation member and the feeding member. The grounding member, the first ground plane, and the radiation member form a first slit. The slit provides a second resonance path operating in a second frequency band.

In an embodiment of the present invention, the connection between the feeding element and the radiation element is separated from the second ground plane by a second distance to generate a capacitive effect with the second ground plane.

In an embodiment of the present invention, the first interval is between 1 and 2 mm, and the second interval is between 1 and 5 mm.

In an embodiment of the present invention, an angle between the first ground plane and the second ground plane is less than 180 degrees.

In an embodiment of the present invention, an angle between the first ground plane and the second ground plane is equal to 90 degrees.

In an embodiment of the present invention, the planar inverted-F antenna has a bend, and the radiating element, the feeding element, and the grounding element have sections parallel to the first ground plane and parallel to the second ground plane, respectively. Section.

In an embodiment of the invention, the first ground plane and the second ground plane include a pivot structure.

In an embodiment of the present invention, the above-mentioned pivot structure includes a first metal bracket, a second metal bracket, and a metal rotating shaft. The first metal bracket is fixed to the first body. The first metal bracket includes a first metal sheet as a first ground plane and a second metal sheet as a second ground plane. The second metal bracket is fixed to the second body. The metal shaft is connected to the first metal bracket and the second metal bracket. The first body is rotated relative to the metal shaft through the rotation of the first metal bracket and the second metal bracket with respect to the second body.

In an embodiment of the present invention, the second metal sheet is connected to an end of the metal shaft, and the feeding point is disposed outside the metal shaft with respect to the second metal sheet.

In an embodiment of the present invention, the grounding member and the feeding member form a second slit.

In an embodiment of the present invention, a width of the first slit is less than or equal to 2 mm.

In an embodiment of the present invention, the length of the first resonance path is an integer multiple of a quarter wavelength of the center frequency of the first frequency band, and the length of the second resonance path is 1/4 of the center frequency of the second frequency band. An integer multiple of the wavelength.

Based on the above, in the embodiment of the present invention, a planar inverted-F antenna is arranged beside the pivot structure, and a high-frequency band resonance mode is generated through the first slit formed by the ground member, the first ground plane, and the radiation member. In this way, the limited space can be effectively used, and the antenna can still have good antenna efficiency without damaging the appearance of the communication device.

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

FIG. 1 is a schematic diagram of a communication device according to an embodiment of the present invention. The communication device includes a first body 102, a second body 104, a pivot structure 106, and a flat inverted F antenna 108. The pivot structure 106 is connected between the first body 102 and the second body 102, and the first body 102 and the second body 104 can be relatively rotated through the pivot structure 106. The first body 102 may include, for example, a metal casing 110 and a plastic frame 112, and the plastic frame 112 surrounds the display panel 114 of the communication device. The metal casing 110 and the plastic frame 112 are stacked on each other to form a first body 102 of the communication device. In addition, the planar inverted-F antenna 108 is disposed beside the pivot structure 106 to avoid slotting holes in the metal casing 110.

Further, as shown in FIG. 2, the pivot structure 106 may include a metal bracket 106-1, a metal rotating shaft 106-2, and a metal bracket 106-3. The metal bracket 106-1 is fixed to the first body 102 and the metal bracket. 106-3 is fixed to the second body 104. As the metal bracket 106-1 and the metal bracket 106-3 rotate relative to the metal shaft 106-2, the first body 102 also rotates relative to the second body 104. The metal bracket 106-1 includes a first metal piece as the ground surface G1 and a second metal piece as the ground surface G2. The second metal piece is connected to the end of the metal rotating shaft 106-2 and is in contact with the first metal piece. An angle less than 180 degrees is formed, that is, the angle between the ground plane G1 and the ground plane G2 is less than 180 degrees. For example, the angle of the phase gap is 90 degrees in this embodiment, but it is not limited thereto.

The manner in which the planar inverted-F antenna 108 is arranged beside the pivot structure 106 can be shown in FIG. 3. In this embodiment, the planar inverted F antenna 108 disposed on the right side of the communication device is used for description. The planar inverted F antenna 108 on the left side of the communication device and the planar inverted F antenna 108 on the right side of the communication device may be arranged to have a mirrored symmetrical plane inverted F. The antenna has the same implementation details as the planar inverted-F antenna 108 on the right side of the communication device, so it will not be described in detail below. The planar inverted-F antenna 108 includes a radiating member 302, a grounding member 304, and a feeding member 306. In this embodiment, the planar inverted-F antenna 108 has a bend, and the radiating member 302, the feeding member 306, and the grounding member 304 respectively have a section parallel to the ground plane G1 and a section parallel to the ground plane G2. The planar inverted-F antenna 108 may be formed on a non-conductive carrier HD (as shown by a dashed line, which may be, for example, a plastic carrier). For example, in this embodiment, the planar inverted-F antenna 108 is formed on a rectangular parallelepiped non-conductive carrier HD. It has a 90-degree bend. Specifically, the length L1, width L2, and height L3 of the planar inverted-F antenna 108 may be 11 mm, 8 mm, and 8.5 mm, respectively. It is worth noting that the planar inverted-F antenna 108 is not limited to the shape of this embodiment, and it varies with the shape of the non-conductive carrier HD. For example, the angle of the bend of the planar inverted-F antenna 108 may be greater than or less than 90 degrees, so that the radiating member 302, the feeding member 306, and the grounding member 304 are originally sections parallel to the ground plane G1 and areas parallel to the ground plane G2 The segments become non-parallel.

The first end of the radiating member 302 is an open end, and the first end of the radiating member 302 is separated from the ground plane G1 by a distance D1, and can generate a capacitive effect with the ground plane G1. The distance D1 can be, for example, between 1 and 2 millimeters. The first end of the grounding member 304 is connected to the radiation member 302, and the second end of the grounding member 304 is connected to the ground plane G1. In addition, the first end of the feeding member 306 is connected to the second end of the radiation member 302, The two ends have a feeding point F1, and the feeding point F1 may be disposed outside the metal rotating shaft 106-2 with respect to the metal sheet G2. The grounding member 304 is disposed between the radiation member 302 and the feeding member 306. The grounding member 304, the ground plane G1, and the radiation member 302 may form a slit S1, and the grounding member 304 and the feeding member 306 may form a slit S2. The width of the slit S1 may be, for example, 2 mm, and the width of the slit S2 may be, for example, between 1 and 2 mm. In addition, the connection between the feeding element 306 and the radiating element 302 is separated from the ground plane G2 by a distance D2 to generate a capacitive effect with the ground plane G2, and the distance D2 may be, for example, between 1 and 5 millimeters.

The feeding element 306 may receive a feeding signal from the feeding point F1 to generate a resonance mode covering a first frequency band and a second frequency band, where the first frequency band may be, for example, a frequency band near 2.4 GHz, and the second frequency band may be, It is a frequency band located near 5GHz. In detail, the resonance mode of the first frequency band can be generated through a first resonance path (shown by a dotted line) through the first end of the radiating member 302, the first end of the grounding member 304, and the second end as shown in FIG. The resonance mode of the second frequency band can be shown in FIG. 5. The second resonance path provided by the slit S1 (shown as a dotted line, that is, extending from the first end of the radiating member 302 to the grounding member 304 and the radiation Connection of the component 302), in addition, part of the bandwidth of the second frequency band also includes the frequency doubling frequency band contributed by the first resonance path. The length of the first resonance path is an integer multiple of a quarter wavelength of the center frequency of the first frequency band, and the length of the second resonance path is an integer multiple of a quarter wavelength of the center frequency of the second frequency band.

FIG. 6 is a return loss diagram of the planar inverted-F antenna according to the embodiment of FIG. 3. FIG. FIG. 7 is an efficiency diagram of the planar inverted-F antenna according to the embodiment of FIG. 3. FIG. As shown in FIG. 6 and FIG. 7, the planar inverted-F antenna 108 in the embodiment of FIG. 3 generates a resonance mode near 2.4 GHz and 5 GHz. The planar inverted-F antenna can still be made without damaging the appearance of the communication device. 108 has good antenna efficiency. In addition, the capacitive effect generated by the first end of the radiating element 302 and the ground plane G1 and the capacitive effect generated by the connection between the feeding element 306 and the radiating element 302 and the ground plane G2 can effectively reduce the antenna size and facilitate The planar inverted-F antenna 108 is disposed beside the pivot structure 106, which is beneficial to the miniaturization of the communication device and maintains the integrity of the appearance.

In summary, in the embodiment of the present invention, a planar inverted-F antenna is arranged beside the pivot structure, and a high-frequency band resonance mode is generated through the first slit formed by the ground member, the first ground plane, and the radiation member. In this way, the limited space can be effectively used, and the antenna can still have good antenna efficiency without damaging the appearance of the communication device. In some embodiments, the antenna size can also be reduced by the capacitive effect between the open end of the radiating element of the planar inverted-F antenna and the ground plane and the capacitive effect between the connection between the feeding element and the radiating element and the ground plane, and It is beneficial to the configuration of the planar inverted-F antenna and the miniaturization of the communication device.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

102‧‧‧First body

104‧‧‧Second body

106‧‧‧ Pivot Structure

106-1, 106-3‧‧‧ metal bracket

106-2‧‧‧ metal shaft

108‧‧‧Plane inverted F antenna

110‧‧‧metal case

112‧‧‧plastic frame

114‧‧‧Display Panel

302‧‧‧Radiation

304‧‧‧ grounding piece

306‧‧‧feed

D1, D2‧‧‧pitch

F1‧‧‧Feed point

G1, G2‧‧‧ ground plane

HD‧‧‧ Non-conductive carrier

L1‧‧‧ length

L2‧‧‧Width

L3‧‧‧ height

FIG. 1 is a schematic diagram of a communication device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a pivot structure according to an embodiment of the present invention. 3 is a schematic configuration diagram of a planar inverted-F antenna according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a low-frequency resonance path of the planar inverted-F antenna according to the embodiment of FIG. 3. FIG. 5 is a schematic diagram of a high-frequency resonance path of the planar inverted-F antenna of the embodiment of FIG. 3. FIG. FIG. 6 is a return loss diagram of the planar inverted-F antenna according to the embodiment of FIG. 3. FIG. FIG. 7 is an efficiency diagram of the planar inverted-F antenna according to the embodiment of FIG. 3.

Claims (12)

A communication device includes: a first body; a second body; a pivot structure, the first body and the second body are relatively rotated through the pivot structure; and a flat inverted F antenna is disposed on the pivot Beside the structure, the planar inverted-F antenna includes: a radiating element, the first end of the radiating element is an open end, and the first end of the radiating element is separated from a first ground plane by a first distance to be connected to the first The ground produces a capacitive effect; a feeding element whose first end is connected to the second end of the radiating element, the second end of the feeding element has a feeding point for receiving a feeding signal; And a grounding member, a first end of which is connected to the radiation member, a second end of the grounding member is connected to the first ground plane, and the feeding member passes from the feeding point through the first end of the radiation member and the grounding member. A first resonance path of the first end and a second end operates in a first frequency band and operates in a second frequency band through a second resonance path. The grounding member is disposed between the radiating member and the feeding member. The ground member, the first ground plane, and the radiation member form a A slit, the first slit provided to the second path of the second resonant frequency band in operation. The communication device according to item 1 of the scope of patent application, wherein the connection between the feeding element and the radiating element is separated from a second ground plane by a second distance to generate a capacitive effect with the second ground plane. The communication device according to item 2 of the scope of patent application, wherein the first interval is between 1 and 2 mm, and the second interval is between 1 and 5 mm. The communication device according to item 2 of the scope of patent application, wherein an angle between the first ground plane and the second ground plane is less than 180 degrees. The communication device according to item 2 of the scope of patent application, wherein an angle between the first ground plane and the second ground plane is equal to 90 degrees. The communication device according to item 2 of the scope of patent application, wherein the planar inverted-F antenna has a bend, so that the radiating member, the feeding member, and the grounding member each have a region parallel to the first grounding plane. A segment and a segment parallel to the second ground plane. The communication device according to item 2 of the scope of patent application, wherein the first ground plane and the second ground plane include the pivot structure. The communication device according to item 7 of the scope of patent application, wherein the pivot structure includes: a first metal bracket fixed to the first body, the first metal bracket including a first ground plane as the first ground plane A metal sheet and a second metal sheet as the second ground plane; a second metal bracket fixedly connected to the second body; and a metal rotating shaft connecting the first metal bracket and the second metal bracket, the first A body is rotated relative to the metal rotating shaft through the first metal bracket and the second metal bracket, and is rotated relative to the second body. The communication device according to item 8 of the scope of patent application, wherein the second metal piece is connected to an end of the metal shaft, and the feeding point is disposed outside the metal shaft with respect to the second metal piece. The communication device according to item 1 of the scope of patent application, wherein the grounding member and the feeding member form a second slit. The communication device according to item 1 of the patent application scope, wherein a width of the first slit is 2 mm or less. The communication device according to item 1 of the patent application range, wherein a length of the first resonance path is an integer multiple of a quarter wavelength of a center frequency of the first frequency band, and a length of the second resonance path is the second frequency band It is an integral multiple of 1/4 wavelength of its center frequency.