TWI672862B - Communication apparatus - Google Patents

Abstract

A communication device. The planar inverted F antenna is disposed beside the pivot structure of the communication device, and generates a resonant mode of the high frequency band through the grounding member, the first ground plane, and the first slit formed by the radiating member.

Description

Communication device

The present invention relates to an electronic device, and more particularly to a communication device.

Due to the high strength, good heat dissipation, and increased design of the metal casing, more and more communication devices (for example, tablets, notebooks, and mobile phones) are made of a metal casing. However, the metal environment formed by the housing of the communication device tends to affect the performance of the antenna elements. For example, the coupling effect between the metal housing of the communication device and the antenna element can form an equivalent capacitance, and the equivalent capacitance formed tends to reduce the radiation efficiency of the antenna, thereby reducing the wireless communication quality of the communication device. The existing antenna design of the all-metal back cover in the market, in order to maintain the radiation efficiency of the antenna, generally destroys the appearance so that the antenna can have sufficient clearance area for radiation, for example, the design of the slotted antenna. This will likely damage the design aesthetics of the product.

The present invention provides a communication device that allows the antenna to still 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 planar inverted-F antenna. The first body and the second body are relatively rotated through the pivot structure. The planar inverted F antenna is placed next to the pivot structure. The planar inverted F antenna includes a radiating element, a feedthrough, and a grounding member. The first end of the radiating member is an open end, and the first end of the radiating member is spaced apart from the first grounding surface by a first distance to generate a capacitive effect with the first grounding surface. The first end of the feedthrough is coupled to the second end of the radiating member, and the second end of the feedthrough has a feed point for receiving the feed signal. The first end of the grounding member is connected to the radiating member, the second end of the grounding member is connected to the first grounding surface, and the feeding member is transmitted through the first end of the radiating member from the feeding point, the first end of the grounding member and the first end of the second end The resonant path operates in the first frequency band and operates in the second frequency band via the second resonant path, the grounding member is disposed between the radiating member and the feed member, and the grounding member, the first grounding surface, and the radiating member form the first slit, the first The slit provides a second resonant path that operates in the second frequency band.

In an embodiment of the invention, the connection between the feeding member and the radiating member is separated from the second grounding surface by a second distance to generate a capacitive effect with the second grounding surface.

In an embodiment of the invention, the first pitch is between 1 and 2 millimeters, and the second pitch is between 1 and 5 millimeters.

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

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

In an embodiment of the invention, the planar inverted-F antenna has a bend, and the radiation member, the feed member and the grounding member respectively have a section parallel to the first ground plane and a parallel to the second ground plane. Section.

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

In an embodiment of the invention, the pivot structure includes a first metal bracket, a second metal bracket, and a metal shaft. The first metal bracket is fixed to the first body, and the first metal bracket includes a first metal piece as a first ground plane and a second metal piece as a second ground plane. The second metal bracket is fixed to the second body. The metal rotating shaft connects the first metal bracket and the second metal bracket, and the first body rotates relative to the second body through the rotation of the first metal bracket and the second metal bracket relative to the metal shaft.

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

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

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

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

Based on the above, an embodiment of the present invention generates a resonant mode of a high frequency band by arranging a planar inverted-F antenna adjacent to the pivot structure and transmitting the ground through the grounding member, the first ground plane, and the first slit formed by the radiating member. This makes it possible to effectively utilize the limited space and still make the antenna have good antenna efficiency without damaging the appearance of the communication device.

The above described features and advantages of the invention will be apparent from the following description.

1 is a schematic diagram of a communication device in accordance with an embodiment of the present invention. The communication device includes a first body 102, a second body 104, a pivot structure 106, and a planar inverted-F antenna 108. The pivot structure 106 is coupled between the first body 102 and the second body 102. The first body 102 and the second body 104 are relatively rotatable through the pivot structure 106. The first body 102 can include, for example, a metal housing 110 and a plastic frame 112, and the plastic frame 112 surrounds the display panel 114 of the communication device. The metal housing 110 and the plastic frame 112 overlap each other to form the first body 102 of the communication device. In addition, a planar inverted F antenna 108 is disposed adjacent to the pivot structure 106 to avoid slotting holes in the metal housing 110.

Further, the pivot structure 106 can be as shown in FIG. 2, including a metal bracket 106-1, a metal shaft 106-2, and a metal bracket 106-3, wherein the metal bracket 106-1 is fixed to the first body 102, the metal bracket The first body 102 is also rotated relative 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 metal bracket 106-1 includes a first metal piece as a ground plane G1 and a second metal piece as a ground plane G2. The second metal piece is connected to the end of the metal rotating shaft 106-2 and is interposed between the first metal piece and the first metal piece. An angle of 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 clamp is 90 degrees in this embodiment, but not limited thereto.

The manner in which the planar inverted F antenna 108 is disposed adjacent to the pivot structure 106 can be as shown in FIG. In the present embodiment, the planar inverted F antenna 108 disposed on the right side of the communication device is illustrated. The left side of the communication device can also be disposed with the plane inverted F antenna 108 on the right side of the communication device to present a plane symmetry of the left and right mirrors. The antenna has the same implementation details as the planar inverted-F antenna 108 on the right side of the communication device, so the following will not be described. The planar inverted-F antenna 108 includes a radiating element 302, a grounding member 304, and a feedthrough 306. In the present embodiment, the planar inverted-F antenna 108 has a bent portion, and the radiation member 302, the feedthrough 306, and the grounding member 304 have a section parallel to the ground plane G1 and a section parallel to the ground plane G2, respectively. The planar inverted-F antenna 108 may be formed on the non-conductive carrier HD (as shown by a broken line, which may be, for example, a plastic carrier). For example, in the embodiment, the planar inverted-F antenna 108 is formed on the rectangular parallelepiped non-conductive carrier HD. It has a 90 degree bend. Specifically, the length L1, the width L2, and the height L3 of the planar inverted-F antenna 108 may be 11 mm, 8 mm, and 8.5 mm, respectively. It is to be noted that the planar inverted-F antenna 108 is not limited to the shape of the embodiment, and the shape of the non-conductive carrier HD is different. For example, the angle of the bend of the planar inverted-F antenna 108 may be greater than or less than 90 degrees, and the portion of the radiation member 302, the feedthrough 306, and the grounding member 304 that is originally parallel to the ground plane G1 and the region parallel to the ground plane G2. The segments become non-parallel.

The first end of the radiating element 302 is an open end, and the first end of the radiating element 302 is spaced apart from the ground plane G1 by a distance D1, and a capacitive effect can be generated with the ground plane G1, and the spacing D1 can be, for example, between 1 and 2 mm. The first end of the grounding member 304 is connected to the radiating element 302, the second end of the grounding member 304 is connected to the grounding surface G1, and the first end of the feeding member 306 is connected to the second end of the radiating member 302, and the feeding member 306 is The two ends have a feed point F1, and the feed point F1 is disposed outside the metal shaft 106-2 with respect to the metal piece G2. The grounding member 304 is disposed between the radiating member 302 and the feeding member 306. The grounding member 304, the grounding surface G1, and the radiating member 302 can form a slit S1. The grounding member 304 and the feeding member 306 can 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 member 306 and the radiating member 302 is spaced apart from the ground plane G2 by a distance D2 to generate a capacitive effect with the ground plane G2, and the spacing D2 may be, for example, between 1 and 5 mm.

The feedthrough 306 can receive the feed signal from the feed point F1 to generate a resonant mode covering the first frequency band and the second frequency band, wherein the first frequency band can be, for example, a frequency band located near 2.4 GHz, and the second frequency band can be, for example, It is a frequency band located near 5 GHz. In detail, the resonant mode of the first frequency band can be generated by the first resonant path (shown by a broken 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. And the resonant mode of the second frequency band can be as shown in FIG. 5, and the second resonant path can be provided by the slit S1 (as indicated by a broken line, that is, extending from the first end of the radiating element 302 to the grounding member 304 and the radiation). The junction of the piece 302 is generated, and in addition, the partial bandwidth of the second frequency band further includes a frequency doubling band contributed by the first resonance path. The length of the first resonant path is an integer multiple of 1/4 wavelength of the center frequency of the first frequency band, and the length of the second resonant path is an integer multiple of 1/4 wavelength of the center frequency of the second frequency band.

Figure 6 is a diagram showing the return loss of a planar inverted-F antenna in accordance with the embodiment of Figure 3. Figure 7 is a graph showing the efficiency of a planar inverted-F antenna in accordance with the embodiment of Figure 3. As shown in FIG. 6 and FIG. 7, the planar inverted-F antenna 108 of the embodiment of FIG. 3 has a resonant mode at 2.4 GHz and 5 GHz, and the planar inverted-F antenna can still be obtained without damaging the appearance of the communication device. 108 has good antenna efficiency. In addition, by 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 member 306 and the radiating element 302 and the ground plane G2, the antenna size can be effectively reduced, and the The planar inverted-F antenna 108 is disposed beside the pivot structure 106 to facilitate miniaturization of the communication device and to maintain the integrity of the appearance.

In summary, the embodiment of the present invention generates a resonant mode of a high frequency band by arranging a planar inverted-F antenna adjacent to the pivot structure and passing through the grounding member, the first ground plane, and the first slit formed by the radiating member. In this way, the limited space can be effectively utilized, and the antenna can still have good antenna efficiency without damaging the appearance of the communication device. In some embodiments, the size of the antenna can also be reduced by the capacitive effect between the open end of the radiating element of the planar inverted-F antenna and the capacitive effect between the junction of the feed member and the radiating element and the ground plane. It is advantageous for the configuration of the planar inverted F antenna and the miniaturization of the communication device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

102‧‧‧First body

104‧‧‧Second body

106‧‧‧ pivot structure

106-1, 106-3‧‧‧ metal bracket

106-2‧‧‧Metal shaft

108‧‧‧ Planar inverted F antenna

110‧‧‧Metal housing

112‧‧‧Plastic border

114‧‧‧ display panel

302‧‧‧radiation parts

304‧‧‧ Grounding parts

306‧‧‧Feed parts

D1, D2‧‧‧ spacing

F1‧‧‧Feeding point

G1, G2‧‧‧ ground plane

HD‧‧‧non-conductive carrier

L1‧‧‧ length

L2‧‧‧Width

L3‧‧‧ Height

1 is a schematic diagram of a communication device in accordance with an embodiment of the present invention. 2 is a schematic view of a pivot structure in accordance with an embodiment of the present invention. FIG. 3 is a schematic diagram of a configuration of a planar inverted-F antenna according to an embodiment of the invention. 4 is a schematic diagram of a low frequency resonant path of a planar inverted-F antenna in accordance with the embodiment of FIG. Figure 5 is a schematic illustration of the high frequency resonant path of the planar inverted F antenna of the embodiment of Figure 3. Figure 6 is a diagram showing the return loss of a planar inverted-F antenna in accordance with the embodiment of Figure 3. Figure 7 is a graph showing the efficiency of a planar inverted-F antenna in accordance with the embodiment of Figure 3.

Claims (13)

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 planar inverted F antenna disposed on the pivot Next to the structure, the planar inverted-F antenna includes: a radiating member, the first end of the radiating member is an open end, and the first end of the radiating member is separated from a first grounding surface by a first spacing to be connected to the first The ground surface generates a capacitive effect; a feed member having a first end connected to the second end of the radiating member, and a second end of the feed member having a feed point for receiving a feed signal; And a grounding member, the first end of which is connected to the radiating member, the second end of the grounding member is connected to the first grounding surface, and the feeding member is transmitted through the first end of the radiating member from the feeding point, the grounding member a first resonant path of the first end and the second end is operated in a first frequency band and is operated in a second frequency band via a second resonant path, and the grounding member is disposed between the radiating element and the feeding member, a grounding member, the first grounding surface, and the radiating member form a first Slit, the first slit provided in the second operating path of the second resonant frequency band, the grounding member is formed with a second slit of the feeding member. The communication device of claim 1, wherein the feeding The junction of the component and the radiating element is spaced apart from a second ground plane by a second spacing to create a capacitive effect with the second ground plane. The communication device of claim 2, wherein the first pitch is between 1 and 2 mm, and the second pitch is between 1 and 5 mm. The communication device of claim 2, wherein an angle between the first ground plane and the second ground plane is less than 180 degrees. The communication device of claim 2, wherein an angle between the first ground plane and the second ground plane is equal to 90 degrees. The communication device of claim 2, wherein the planar inverted-F antenna has a bend, and the radiation member, the feed member and the ground member respectively have a region parallel to the first ground plane a segment and a segment parallel to the second ground plane. The communication device of claim 2, wherein the first ground plane and the second ground plane comprise the pivot structure. The communication device of claim 7, wherein the pivot structure comprises: a first metal bracket fixed to the first body, the first metal bracket including a first one as the first ground plane a metal piece and a second metal piece as the second grounding surface; a second metal bracket fixed to the second body; and a metal rotating shaft connecting the first metal bracket and the second metal bracket, the first metal bracket a body passing through the first metal bracket and the second metal bracket relative to the metal The rotation of the shaft is rotated relative to the second body. The communication device of claim 8, wherein the second metal piece is connected to an end of the metal rotating shaft, and the feeding point is disposed outside the metal rotating shaft with respect to the second metal piece. The communication device of claim 1, wherein the first slit has a width of 2 mm or less. The communication device of claim 1, wherein the length of the first resonant path is an integer multiple of a quarter wavelength of a center frequency of the first frequency band, and the length of the second resonant path is the second frequency band. An integral multiple of 1/4 wavelength of the center frequency. 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 planar inverted F antenna disposed on the pivot Next to the structure, the planar inverted-F antenna includes: a radiating member, the first end of the radiating member is an open end, wherein the first end of the radiating member is separated from a first grounding surface by a first spacing, and the first The grounding surface generates a capacitive effect; a feed member has a first end connected to the second end of the radiating member, and a second end of the feeding member has a feeding point for receiving a feeding signal ,its The connection between the feedthrough and the radiating member is separated from the second ground plane by a second spacing to generate a capacitive effect with the second ground plane, wherein the angle between the first ground plane and the second ground plane is a grounding member, the first end of which is coupled to the radiating member, the second end of the grounding member is coupled to the first grounding surface, and the feeding member is transmitted through the first end of the radiating member from the feeding point a first resonant path of the first end and the second end of the grounding member is operated in a first frequency band and is operated in a second frequency band via a second resonant path, the grounding member is disposed on the radiating element and the feeding member The grounding member, the first grounding surface, and the radiating member form a first slit, the first slit provides the second resonant path operating in the second frequency band, the grounding member and the feeding member A second slit is formed. 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 planar inverted F antenna disposed on the pivot Next to the structure, the planar inverted-F antenna includes: a radiating member, the first end of the radiating member is an open end, wherein the first end of the radiating member is separated from a first grounding surface by a first spacing, and the first The grounding surface generates a capacitive effect; a feed member has a first end connected to the second end of the radiating member, and a second end of the feeding member has a feeding point for receiving a feeding signal ,its The connection between the feedthrough and the radiating member is separated from a second ground plane by a second distance to generate a capacitive effect with the second ground plane; and a grounding member having a first end connected to the radiating member, a second end of the grounding member is connected to the first grounding surface, and the feeding member is operated through a first resonant path from the feeding point via the first end of the radiating member, the first end and the second end of the grounding member a first frequency band and a second frequency band are operated in a second frequency band, the grounding member is disposed between the radiation member and the feeding member, and the grounding member, the first grounding surface and the radiating member form a first a slit, the first slit provides the second resonant path operating in the second frequency band, the grounding member and the feeding member form a second slit, wherein the planar inverted-F antenna has a bend, The radiation member, the feed member, and the ground member respectively have a section parallel to the first ground plane and a section parallel to the second ground plane.