CN112864587B

CN112864587B - Antenna device and wireless communication device

Info

Publication number: CN112864587B
Application number: CN201911099319.3A
Authority: CN
Inventors: 陈鹏飞; 周昌文
Original assignee: Oneplus Technology Shenzhen Co Ltd
Current assignee: Oneplus Technology Shenzhen Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2023-05-05
Anticipated expiration: 2039-11-12
Also published as: CN112864587A

Abstract

The application relates to an antenna device, which comprises a metal floor and a metal antenna, wherein a clearance area is arranged on the metal floor; a feed port connected with the metal floor; the first radiator is arranged in the clearance area and is connected with the metal floor; one end of the radiation branch is connected with the feed port, and the other end of the radiation branch is connected with the first radiator; and the second radiator is arranged in the clearance area, is connected with the metal floor and forms electromagnetic coupling with the first radiator. The antenna device can simultaneously realize resonance of a plurality of frequency bands on a single antenna, and occupies small space. The application also relates to a wireless communication device.

Description

Antenna device and wireless communication device

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to an antenna device and a wireless communication device having the same.

Background

An antenna on a wireless communication device is a structure mounted on the wireless communication device for receiving and transmitting transceiver signals. Since different wireless communication providers may use different signal transmission frequency bands, to ensure that the wireless communication device can conveniently and clearly receive wireless signals, the antenna device needs to be capable of implementing multi-band operation.

Conventional multifrequency antennas are typically provided with multiple feed ports to form multiple antennas, or multiple parasitic resonances to increase the frequency band. However, this approach may increase the spatial size of the antenna assembly and thus may be disadvantageous for use in increasingly miniaturized wireless communication devices.

Disclosure of Invention

In view of the above, it is necessary to provide an antenna device which is suitable for a metal environment, has a small size, and can generate multi-frequency resonance.

An antenna device comprises a metal floor provided with a clearance area; a feed port connected with the metal floor; the first radiator is arranged in the clearance area and is connected with the metal floor; one end of the radiation branch is connected with the feed port, and the other end of the radiation branch is connected with the first radiator; and the second radiator is arranged in the clearance area, is connected with the metal floor and is in electromagnetic coupling with the first radiator.

In the antenna device, the first radiator and the second radiator are electromagnetically coupled, and multi-band resonance is realized by sharing the radiation branches. Therefore, the antenna device has compact and reasonable layout, and the space size of the antenna device is not increased while the multi-frequency resonance is realized. Meanwhile, the antenna device is provided with only one feed port, so that the mutual influence between the feed ports is avoided, and the feed ports are not required to be separated through a duplexer and other devices, so that the loss on a transmission path is reduced, and the signal transmission efficiency is improved.

In one embodiment, the clearance area comprises a groove formed in the edge of the metal floor, one end of the first radiator is connected with the groove wall of the groove, and the other end of the first radiator extends along a direction parallel to the groove bottom of the groove.

In one embodiment, the bottom of the groove is a plane or a curved surface.

In one embodiment, the radiating branches include a first radiating branch connected to the feed port and disposed parallel to the first radiator; and one end of the second radiation branch is connected with one end of the first radiation branch, which is far away from the feed port, and the other end of the second radiation branch extends along the direction perpendicular to the first radiation branch and is connected with the first radiator; the second radiation branches divide the first radiator into a radiation area and a coupling area, the radiation area is connected with the metal floor, and the coupling area is arranged at intervals with the second radiator and is used for forming electromagnetic coupling with the second radiator.

In one embodiment, one end of the second radiator is connected to a groove wall of one side of the groove away from the first radiator, and the other end of the second radiator extends along a direction parallel to the groove bottom of the groove and is arranged at a distance from the coupling region.

In one embodiment, the device further comprises a parasitic radiation branch, one end of the parasitic radiation branch is connected with the metal floor, the other end of the parasitic radiation branch is a free end, and the parasitic radiation branch and the radiation branch are arranged at intervals to form electromagnetic coupling.

In one embodiment, the antenna device further comprises a matching unit, which is connected between the feed port and the radiation branch and is used for tuning the resonance frequency and the bandwidth of the antenna device.

In one embodiment, the clearance area is filled with a plastic material, and the first radiator and the second radiator are both disposed on the surface of the plastic material.

The wireless communication device comprises a communication module, wherein the communication module comprises a radio frequency unit, the communication module further comprises an antenna device as described above, and the feed port is connected with the radio frequency unit and used for carrying out signal transmission with the radio frequency unit.

Above-mentioned wireless communication equipment through position, size and the shape of each branch in the adjustment antenna device, can satisfy multiple signal transmission frequency channel simultaneously, and this wireless communication equipment possesses metal casing, and the outward appearance fashion accords with market demand.

In one embodiment, the radiating stub, the first radiator, and the second radiator are each formed from conductive structures on the wireless communication device.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an antenna device of the present application;

fig. 2 is a schematic diagram of a current path of the antenna device of the present application;

fig. 3 is a frequency response diagram of an embodiment of an antenna device of the present application;

fig. 4 is a schematic structural diagram of another embodiment of an antenna device according to the present application.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," "circumferential," and the like as used herein are based on the orientation or positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the conventional technology, technicians also increase the frequency band and bandwidth supported by the antenna by adding an aperture switch. However, since aperture tuning essentially transforms different resonances at different times by the antenna to meet different frequency bands, only the time-sharing requirements of the frequency bands, such as cellular antennas, can be met. However, when multiple frequency bands are required to be supported simultaneously, the aperture switch cannot meet the requirement, and the increase of the aperture switch device also causes the increase of the manufacturing cost of the antenna. For antennas that use a single resonance to cover different frequency bands or generate two resonances to satisfy different frequency bands, there is generally a problem that the single resonance frequency band is not wide or the distance between two resonance frequencies is not far.

In addition, in order to pursue fashion of appearance, a metal is generally used to prepare a frame of the wireless communication device, but a metal environment may cause loss of signal transmission, so that design of an antenna device is also challenged.

The present invention is directed to a method for manufacturing a semiconductor device, and a semiconductor device manufactured by the method.

Referring to fig. 1, the present application provides an antenna device, which can be used as a back shell of a mobile terminal such as a mobile phone, and includes a metal floor 100, an antenna body, and a feeding port 10, wherein the feeding port 10 is connected with the metal floor 100. The metal floor 100 is provided with a clearance area 20 for leaving an open space for the antenna, so as to prevent the electromagnetic wave from being shielded or interfered by the metal floor 100 when the antenna transmits and receives the electromagnetic wave.

The antenna body is disposed on the metal floor 100, and includes a radiation branch 103, a first radiator 101, and a second radiator 102.

Specifically, the first radiator 101 is disposed in the clearance area 20 and is connected to the metal floor 100 through the radiation stub 103. At this time, the radiation branch 103, the first radiator 101, and the metal floor 100 form a first radiation structure. By adjusting the size, position and shape of the first radiator 101, the first radiating structure can be provided with two current paths, and dual-frequency resonance can be realized by the first radiating structure. As shown in fig. 2, the two current paths are a first current path 1 and a second current path 2, respectively, wherein the first current path 1 is shown by a thicker solid line with an arrow, the corresponding resonance frequency is a first resonance frequency f1, and the second current path 2 is shown by a dashed line with an arrow, the corresponding resonance frequency is a second resonance frequency f2.

The second radiator 102 is provided in the clearance area 20, and the second radiator 20 is connected to the metal floor 100 and forms electromagnetic coupling with the first radiator 101. All references to electromagnetic coupling in this case mean indirect electrical connection. At this time, the radiation branch 103, the second radiator 102, and the metal floor 100 form a second radiation structure. As shown in fig. 2, a third current path 3 is formed in the second radiating structure, indicated by a dash-dot line with an arrow, and the corresponding resonance frequency is a third resonance frequency f3.

In the antenna device, the first radiator 101 and the second radiator 102 form electromagnetic coupling, and resonance of at least three frequency bands is realized by sharing the radiation branch 103. The antenna device is a single antenna device, has compact and reasonable layout, and can not increase the space size of the antenna device while realizing multi-frequency resonance. Meanwhile, the antenna device is provided with only one feed port 10, so that the mutual influence among different feed ports is avoided, and the feed ports are not required to be separated through a duplexer and other devices, so that the loss on a transmission path is reduced, and the signal transmission efficiency is improved.

According to some embodiments of the present invention, as shown in fig. 1, the headroom zone 20 includes a groove opened at an edge of the metal floor 100, and the first radiator 101 is connected to a wall of the groove and extends in a direction parallel to a bottom of the groove, wherein the bottom of the groove may be a plane or a curved surface. Through setting up the direction of being on a parallel with clearance district 20 tank bottom with first radiator 101, made things convenient for the length adjustment to first current path 1, also made the overall arrangement of first radiation structure more reasonable orderly simultaneously, be favorable to reducing antenna main body's occupation space. In addition, the processing of the antenna device is also facilitated by setting the bottom of the clearance area 20 as a plane, and the space of the clearance area 20 can be fully utilized by setting the bottom of the clearance area 20 as a curved surface, so that the lengths of the first radiator 101 and the second radiator 102 can be conveniently adjusted, and further the resonance of different frequency bands of the antenna device can be conveniently regulated and controlled.

Further, with continued reference to fig. 1, the radiation branch 103 includes a first radiation branch 1031, where the first radiation branch 1031 is connected to the feed port 10 and is disposed parallel to the first radiator 101; and a second radiation branch 1032, one end of the second radiation branch 1032 is connected to one end of the first radiation branch 1031 remote from the feed port 10, and the other end extends in a direction perpendicular to the first radiation branch 1031 and is connected to the middle of the first radiator 101; the second radiating branch 1032 separates the first radiator 101 into a radiating region 1011 and a coupling region 1012. Further, the radiating area 1011 is connected to the metal floor 100, so as to form a first radiating structure with the radiating branches 103 and the metal floor 100; the coupling region 1012 is spaced apart from the second radiator for forming electromagnetic coupling with the second radiator 102, so that the radiation stub 103 forms a second radiation structure with the second radiator 102 and the metal floor 100 through the coupling region 1012. Wherein the resonant modes of the first radiating structure and the second radiating structure may be loop resonant modes.

Further, one end of the second radiator 102 is connected to a groove wall of the clearance area 20 on a side far away from the first radiator 101, and the other end extends along a direction parallel to a groove bottom of the clearance area 20 and is spaced from the coupling area 1012. Preferably, the second radiator 102 and the first radiator 101 lie in a plane parallel to the bottom of the tank of the headroom zone 20. It should be noted that the size of the gap between the end of the second radiator 102 near the coupling region 1012 and the coupling region 1012 can be adjusted according to the actual resonant frequency requirement, so as to implement the multiband resonance of the antenna device of the present application.

In addition, by setting the radiation branches 103 to be the first radiation branches 1031 and the second radiation branches 1032 which are vertically connected end to end, the position, the size and the shape of the radiation branches 103 can be adjusted, thereby facilitating the adjustment of the resonant frequency and the bandwidth of the antenna device.

According to some embodiments of the invention, the antenna arrangement further comprises a parasitic radiating stub 104. Specifically, one end of the parasitic radiation branch 104 is connected to the metal floor 100 through a connector 105, and the other end is suspended as a free end. The parasitic radiating branches 104 are spaced adjacent to the radiating branches to form electromagnetic coupling such that a fourth current path 4 may be formed in the parasitic radiating branches 104, as shown in fig. 2, the fourth current path 4 being shown by the thinner solid lines with arrows, the corresponding resonant frequency being a fourth resonant frequency f4. By adding the parasitic radiation branches 104, additional resonant frequencies in different frequency bands can be added, so that the antenna device can realize the multi-frequency band resonant effect at the same time. It will be appreciated that the radiating stub 103, the first radiator 101, the second radiator 102, and the parasitic radiating stub are all made of electrically conductive materials.

Fig. 3 is a frequency response diagram of the antenna device according to the present embodiment, wherein the horizontal axis represents frequency in GHz and the vertical axis represents return loss in dB. The first, second, third and fourth resonant frequencies f1, f2, f3 and f4, respectively, have been shown in fig. 3 by solid arrows. In this embodiment, the reflection loss is referenced to-5 dB, i.e., return loss below-5 dB is indicative of an acceptable communication quality range. As can be seen from fig. 3, the first resonant frequency f1 can cover the low frequency diversity around 1.175GHz, the fourth resonant frequency f4 can cover the GPS band around 1.5GHz, the second resonant frequency f2 can cover the WiFi communication band around 2.4GHz, and the third resonant frequency f3 can cover the high frequency diversity around 2.9 GHz.

Corresponding to signals in different frequency bands, the current in the antenna device of the embodiment can respectively realize multi-band operation through corresponding current paths. Specifically, the frequency band and the bandwidth where the resonant frequency is located can be adjusted by adjusting the position, the shape and the size of each branch. In addition, the antenna device has smaller size, small required space and strong practicability.

According to some embodiments of the invention, the antenna device may further comprise a matching unit. The matching unit is interposed between the feed port 10 and the radiating stub 103. Specifically, the matching unit is connected between the feed port 10 and the first radiating stub 1031, for tuning the resonant frequency and bandwidth of the antenna device. The performance of each radiating structure can be improved by the tuning action of the matching unit.

According to some embodiments of the present invention, the clearance area 20 is filled with a plastic material, and the first radiator 101 and the second radiator 102 are disposed on the surface of the plastic material. Through filling nonmetallic structures such as plastic in clearance area 20, can realize firm pleasing to the eye effect, set up first radiator 101 and second radiator 102 at the surface of plastic simultaneously, can make the overall arrangement of antenna main part clear and can not occupy too much space. The depth of the clearance area 20 is in the millimeter order, so that the whole antenna device has high structural firmness and attractive appearance can be ensured.

According to some embodiments of the present invention, the radiating branch 103, the first radiator 101, and the second radiator 102 may be bent adaptively according to the internal structure of the wireless communication device. As shown in fig. 4, since the clearance area 20 is formed at the corner, the bottom of the clearance area 20 is an arc surface, which is favorable for adjusting the length of the first radiator 101, and correspondingly, the second radiator 102 can also be bent adaptively, so that the space of the clearance area 20 is fully utilized, the structure of the antenna main body is more compact, and the multi-frequency resonance effect of the antenna device is not affected. It is understood that fig. 4 represents only one embodiment, and the radiation branches 103, the first radiator 101, and the second radiator 102 in the antenna device may be bent in other shapes according to actual space requirements.

The application further provides a wireless communication device, which comprises a communication module, wherein the communication module comprises a radio frequency unit, the communication module further comprises an antenna device as described above, and the feed port 10 is connected with the radio frequency unit and is used for carrying out signal transmission with the radio frequency unit.

According to the wireless communication equipment, the positions, the sizes and the shapes of all branches in the antenna device are adjusted, so that various signal transmission frequency bands can be simultaneously met, and the wireless communication process is facilitated. In addition, the wireless communication equipment is provided with a metal shell, has fashionable appearance and meets market demands.

In this embodiment, the first radiator 101 and the second radiator 102 may be formed of a conductive structure such as a metal housing in the wireless communication device, so that the space size of the antenna device is further reduced, which is advantageous for realizing miniaturization development of the wireless communication device. The wireless communication device can be a mobile phone, a wristwatch device, an earphone device or other wearable devices, and can also be other electronic devices such as a television, a set top box, a digital camera and the like.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An antenna device, comprising:

a metal floor provided with a clearance area;

a feed port connected with the metal floor;

the first radiator is arranged in the clearance area and is connected with the metal floor; the clearance area comprises a groove formed in the edge of the metal floor, one end of the first radiator is connected with the wall of the groove, and the other end of the first radiator extends along the direction parallel to the bottom of the groove;

one end of the radiation branch is connected with the feed port, and the other end of the radiation branch is connected with the first radiator; the radiation branches, the first radiator and the metal floor form a first radiation structure, and a first current path and a second current path are formed in the first radiation structure; the resonant frequency corresponding to the first current path is a first resonant frequency, and the resonant frequency corresponding to the second current path is a second resonant frequency; the method comprises the steps of,

the second radiator is arranged in the clearance area, is connected with the metal floor and is in electromagnetic coupling with the first radiator;

the radiation branches, the second radiator and the metal floor form a second radiation structure, a third current path is formed in the second radiation structure, and the resonant frequency corresponding to the third current path is a third resonant frequency;

the radiation branch includes:

the first radiation branch is connected with the feed port and is arranged in parallel with the first radiator; the method comprises the steps of,

one end of the second radiation branch is connected with one end of the first radiation branch, which is far away from the feed port, and the other end of the second radiation branch extends along the direction perpendicular to the first radiation branch and is connected with the first radiator;

the second radiation branches divide the first radiator into a radiation area and a coupling area, the radiation area is connected with the metal floor, and the coupling area is arranged at intervals with the second radiator and is used for forming electromagnetic coupling with the second radiator.

2. The antenna device according to claim 1, wherein the radiating area is connected to a metal floor so as to form a first radiating structure with the first radiating stub, the second radiating stub, and the metal floor; the first radiation branch knot and the second radiation branch knot form a second radiation structure with the second radiator and the metal floor through the coupling area.

3. The antenna device according to claim 1, wherein the bottom of the recess is a plane or a curved surface.

4. The antenna device of claim 1, wherein the resonant modes of the first radiating structure and the second radiating structure comprise loop resonant modes.

5. The antenna device according to claim 4, wherein one end of the second radiator is connected to a groove wall of a side of the groove away from the first radiator, and the other end extends in a direction parallel to a groove bottom of the groove and is spaced apart from the coupling region.

6. The antenna device according to claim 1, further comprising:

and one end of the parasitic radiation branch is connected with the metal floor, the other end of the parasitic radiation branch is a free end, and the parasitic radiation branch and the radiation branch are arranged at intervals to form electromagnetic coupling.

7. The antenna device according to claim 1, further comprising a matching unit, which is interposed between the feed port and the radiating stub, for tuning the resonant frequency and bandwidth of the antenna device.

8. The antenna device according to claim 1, wherein the clearance area is filled with a plastic material, and the first radiator and the second radiator are both disposed on a surface of the plastic material.

9. A wireless communication device comprising a communication module, the communication module comprising a radio frequency unit, characterized in that the communication module further comprises an antenna arrangement according to any of claims 1-8, wherein the feed port is connected to the radio frequency unit for signal transmission with the radio frequency unit.

10. The wireless communication device of claim 9, wherein the radiating stub, the first radiator, and the second radiator are each formed from conductive structures on the wireless communication device.