CN112787078B

CN112787078B - Antenna and terminal

Info

Publication number: CN112787078B
Application number: CN201911073234.8A
Authority: CN
Inventors: 刘瑞斌
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2022-12-02
Anticipated expiration: 2039-11-05
Also published as: CN112787078A

Abstract

The embodiment of the invention provides an antenna and a terminal, wherein the antenna comprises the following components: including the radiation branch festival, the ground connection branch festival, feed branch festival and resonant frequency switching circuit, the radiation branch festival and ground connection branch festival, feed branch festival and resonant frequency switching circuit connect, wherein, resonant frequency switching circuit sets up in ground connection branch festival or feed branch festival, resonant frequency switching circuit is used for switching over the resonant frequency of antenna, in some implementation processes, because resonant frequency switching circuit sets up in ground connection branch festival or feed branch festival, consequently, need not to set up the tie point of resonant frequency switching circuit and terminal mainboard alone, thereby the number of antenna and terminal mainboard tie point has been reduced, the degree of difficulty that sets up of antenna has been reduced, the problem of influencing other device overall arrangements has been avoided.

Description

Antenna and terminal

Technical Field

The embodiment of the invention relates to the field of communication, in particular to but not limited to an antenna and a terminal.

Background

At present, terminals such as smart phones tend to have large screens, ultrathin bodies, and the like, which results in less space left for antennas. In order to meet communication requirements such as multi-band coverage and reduction of influence of human body parts (such as hands, heads and the like) on communication performance of the terminal in daily use, the number of antennas in the terminal is increased, and space reserved for each antenna in the terminal is further reduced. In the related art, the number of connection points between the antenna and the terminal main board is large, and the number of connection points between the antenna and the terminal main board is large in a narrow space, so that the difficulty in setting the antenna is increased, and the layout of other devices (such as a camera, a loudspeaker and the like) is influenced.

Disclosure of Invention

The antenna and the terminal provided by the embodiment of the invention mainly solve the technical problems that the number of the connected antennas and a terminal main board is large, the difficulty in setting the antenna is increased, and the layout of other devices is influenced.

To solve the above technical problem, the present invention provides an antenna, including: the antenna comprises a radiation branch section, a grounding branch section, a feed branch section and a resonant frequency switching circuit, wherein the radiation branch section is connected with the grounding branch section, the feed branch section and the resonant frequency switching circuit, the resonant frequency switching circuit is arranged in the grounding branch section or the feed branch section, and the resonant frequency switching circuit is used for switching the resonant frequency of the antenna.

The embodiment of the invention also provides a terminal which comprises the antenna.

The beneficial effects of the invention are:

according to the antenna and the terminal provided by the embodiment of the invention, the antenna comprises: radiation branch section, ground connection branch section, feed branch section and resonant frequency switching circuit, radiation branch section and ground connection branch section, feed branch section and resonant frequency switching circuit are connected, wherein, resonant frequency switching circuit sets up in ground connection branch section or feed branch section, resonant frequency switching circuit is used for switching over the resonant frequency of antenna, in some implementation processes, because resonant frequency switching circuit sets up in ground connection branch section or feed branch section, consequently, need not to set up the tie point of resonant frequency switching circuit and terminal mainboard alone, thereby the number of antenna and terminal mainboard tie point has been reduced, the degree of difficulty that sets up of antenna has been reduced, the problem of influencing other device overall arrangements has been avoided.

Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic diagram of an antenna structure according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a resonant frequency configuration sub-circuit according to a first embodiment of the present invention;

fig. 3 is a schematic view of another structure of an antenna according to a first embodiment of the present invention

Fig. 4 is a schematic structural diagram of an example of a resonant frequency configuration sub-circuit according to a first embodiment of the present invention;

fig. 5 is a schematic diagram of an antenna structure according to a second embodiment of the present invention;

fig. 6 is a schematic diagram of an antenna structure according to a third embodiment of the present invention;

fig. 7 is a schematic diagram of an antenna structure according to a fourth embodiment of the present invention;

fig. 8 is a schematic diagram of an arrangement position of adjacent antennas according to a fifth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows:

at present, an antenna generally includes a frequency switching module, a radiation module, a ground module, a feed module, and the like, where the frequency switching module is used to switch a resonant frequency of the antenna, so that the antenna can operate in multiple frequency bands, and in the related art, the frequency switching module, the radiation module, the ground module, the feed module, and the like in the antenna all need to be connected with a terminal motherboard, which results in more connection points between the antenna and the terminal motherboard, increases the difficulty in setting the antenna, and affects the layout of other devices. In order to solve the above problem, an embodiment of the present invention provides an antenna, and referring to fig. 1, the antenna includes: the antenna comprises a radiation branch section 10, a grounding branch section 20, a feed branch section 30 and a resonant frequency switching circuit 40, wherein the radiation branch section 10 is connected with the grounding branch section 20, the feed branch section 30 and the resonant frequency switching circuit 40, the resonant frequency switching circuit 40 is arranged in the grounding branch section 20 or the feed branch section 30, and the resonant frequency switching circuit 40 is used for switching the resonant frequency of the antenna, so that the antenna can work in different frequency bands. That is, the resonant frequency switching circuit 40 may be provided in the ground branch 20 (in fig. 1, explanation is made with the resonant frequency switching circuit 40 provided in the ground branch 20), or may be provided in the feed branch 30. In the embodiment of the present invention, since the resonant frequency switching circuit 40 is disposed in the ground branch section 20 or the feed branch section 30, it is not necessary to separately set the connection point between the resonant frequency switching circuit 40 and the terminal motherboard, thereby reducing the number of connection points between the antenna and the terminal motherboard, reducing the difficulty in setting the antenna, and avoiding the problem of affecting the layout of other devices.

In the embodiment of the present invention, the grounding branch section 20 is used for grounding.

It should be noted that the feed leg 30 includes a feed point.

In the embodiment of the present invention, referring to fig. 2, the resonant frequency switching circuit 40 includes a selection circuit 401 and at least two frequency configuration sub-circuits 402, where the selection circuit 401 is used to switch the resonant frequency of the antenna, and may be any circuit capable of switching the resonant frequency of the antenna. One end of the selection circuit 401 is connected to the radiation branch 10, the other end is connected to each frequency configuration sub-circuit 402, one end of each frequency configuration sub-circuit 402 is connected to the radiation branch 10, and the other end may be grounded. It should be noted that the resonant frequencies of the frequency configuration sub-circuits 402 are different, so that the antenna can operate in different frequency bands. The frequency configuration sub-circuit 402 may be formed of a capacitor, an inductor, and other components, and in order to make the resonant frequency of each frequency configuration sub-circuit 402 different, the capacitance value of the capacitor and/or the inductance value of the inductor of each frequency configuration sub-circuit 402 may be different.

In an embodiment of the present invention, referring to fig. 3, the resonant frequency switching circuit 40 may be disposed in the feed branch section 30. When the resonant frequency switching circuit 40 is provided in the feed branch 30, the resonant frequency switching circuit 40 is connected in parallel with a feed point 301 in the feed branch 30, the feed point 301 being connected to the radiation branch 10. The selection circuit 401 may be a multi-selection switch, a fixed end of the multi-selection switch is connected to the radiation branch 10, a selection end of the multi-selection switch is connected to the resonant frequency configuration sub-circuit 402, and the multi-selection switch is used to control a connection state between each frequency configuration sub-circuit 402 and the radiation branch 10, so as to switch the resonant frequency of the antenna. For example, referring to fig. 4, it is assumed that the resonant frequency switching circuit 40 includes two frequency configuring sub-circuits (a first frequency configuring sub-circuit 4021 and a second frequency configuring sub-circuit 4022, respectively) and an alternative switch 4011 (the number of the selection terminals of the multiple selection switch may be set according to the number of the frequency configuring sub-circuits 402), the frequency of the first frequency configuring sub-circuit 4021 is frequency 1, the frequency of the second frequency configuring sub-circuit 4022 is frequency 2, the fixed terminal of the switch 4011 is connected to the radiation branch 10, the two selection terminals of the switch 4011 are connected to the first frequency configuring sub-circuit 4021 and the second frequency configuring sub-circuit 4022, respectively, in the figure, the first frequency configuring sub-circuit 4021 is connected to the radiation branch 10 through the switch 4011, the resonant frequency of the antenna is frequency 1, if it is required to switch the resonant frequency of the antenna to the radiation branch 2, the connection of the first frequency configuring sub-circuit 4021 to the radiation branch 10 is disconnected through the switch 4011, and the second frequency configuring sub-circuit 4022 is connected to the antenna through the switch 4011, and thus the antenna is the second frequency configuring sub-circuit 4022, that is the radiation branch 10, that is the second frequency configuring sub-circuit (i.e., the second frequency configuring sub-circuit after the antenna, that is the resonant frequency configuring sub-frequency (i.g., the resonant frequency configuring sub-circuit 4012).

In the embodiment of the present invention, the resonant frequency switching circuit 40 may be disposed in the ground branch 20, and one end of the resonant frequency configuration sub-circuit 402 is connected to the selection circuit 401, and the other end is grounded. The selection switch may be a multi-selection switch, a fixed end of the multi-selection switch is connected to the radiation branch 10, a selection end of the multi-selection switch is connected to each frequency configuration sub-circuit 402, and the multi-selection switch is used to control a connection state between each frequency configuration sub-circuit 402 and the radiation branch 10, so as to switch the resonant frequency of the antenna. Alternatively, to avoid the problem of the antenna low frequency resonance switching being motionless or not efficient after switching, the selection circuit 401 may be a circuit with frequency selection function, which can switch the resonance frequency of the antenna by filtering the frequency generated by the frequency configuration sub-circuit 402, for example, assuming that the resonance frequency switching circuit includes two frequency configuration sub-circuits, one of which generates 1900Mhz, and the other one of which generates 1950Mhz, if the antenna needs to resonate at 1900Mhz, the selection circuit may filter out 1950Mhz, leaving 1900Mhz; if the antenna needs to resonate at 1950Mhz, the selection circuit can filter out 1900Mhz, leaving 1950Mhz, thereby achieving switching of the antenna resonant frequency. The circuit with the frequency selection function may be a high-pass filter, or may be a combiner, or of course, may be a circuit with other specific frequency selection functions.

In the embodiment of the present invention, the antenna may be an IFA (Inverted F antenna), may also be an antenna with a suitably modified IFA, and may also be an antenna in another form. Wherein the antennas may be diversity antennas.

The antenna provided by the embodiment of the invention comprises: radiation branch section, ground connection branch section, feed branch section and resonant frequency switching circuit, radiation branch section and ground connection branch section, feed branch section and resonant frequency switching circuit are connected, wherein, resonant frequency switching circuit sets up in ground connection branch section or feed branch section, resonant frequency switching circuit is used for switching over the resonant frequency of antenna, in some implementation processes, because resonant frequency switching circuit sets up in ground connection branch section or feed branch section, consequently, need not to set up the tie point of resonant frequency switching circuit and terminal mainboard alone, thereby the number of antenna and terminal mainboard tie point has been reduced, the degree of difficulty that sets up of antenna has been reduced, the problem of influencing other device overall arrangements has been avoided.

Example two:

for a better understanding of the present invention, the present embodiment is described with reference to more specific examples. Referring to fig. 5, the antenna includes: the antenna comprises a radiation branch section 10, a grounding branch section 20, a feed branch section 30 and a resonant frequency switching circuit 40, wherein the radiation branch section 10 is connected with the grounding branch section 20, the feed branch section 30 and the resonant frequency switching circuit 40, the resonant frequency switching circuit 40 is arranged on the grounding branch section 20, and the resonant frequency switching circuit 40 is used for switching the resonant frequency of the antenna, so that the antenna can work in different frequency bands. In the embodiment of the invention, because the resonant frequency switching circuit 40 is arranged in the grounding branch section 20, the connection point of the resonant frequency switching circuit 40 and the terminal mainboard does not need to be separately arranged, thereby reducing the number of the connection points of the antenna and the terminal mainboard, reducing the arrangement difficulty of the antenna and avoiding the problem of influencing the layout of other devices.

It should be noted that the feeding branch 30 includes a feeding point 301, and the feeding point 301 is connected to the radiation branch 10.

In the embodiment of the present invention, the resonant frequency switching circuit 40 includes a selection circuit 401 and at least two frequency configuration sub-circuits 402, the selection circuit 401 is a high-pass filter, one end of the high-pass filter is connected to the radiation branch 10, the other end of the high-pass filter is connected to each frequency configuration sub-circuit 402, one end of each frequency configuration sub-circuit 402 is connected to the high-pass filter, and the other end of the frequency configuration sub-circuit is grounded. It should be noted that the resonant frequencies of the frequency configuration sub-circuits 402 are different, so that the high-pass filter can perform filtering as needed, thereby realizing the switching of the antenna resonant frequency. And the high-pass filter can improve the isolation between the antenna and other antennas, and realize the free switching of low-frequency resonance.

The frequency arrangement sub-circuit 402 may be formed of a capacitor, an inductor, or other components, and in order to make the resonant frequency of each frequency arrangement sub-circuit 402 different, the capacitance value of the capacitor and/or the inductance value of the inductor of each frequency arrangement sub-circuit 402 are different.

In the embodiment of the present invention, the antenna is an IFA, and the antenna may be a diversity antenna.

The antenna provided by the embodiment of the invention comprises: radiation branch section, ground connection branch section, feed branch section and resonant frequency switching circuit, radiation branch section and ground connection branch section, feed branch section and resonant frequency switching circuit are connected, wherein, resonant frequency switching circuit sets up in ground connection branch section, resonant frequency switching circuit is used for switching over the resonant frequency of antenna, in some implementation processes, because resonant frequency switching circuit sets up in ground connection branch section, consequently, need not to set up the tie point of resonant frequency switching circuit and terminal mainboard alone, thereby the number of antenna and terminal mainboard tie point has been reduced, the degree of difficulty that sets up of antenna has been reduced, the problem of influencing other device overall arrangements has been avoided.

Example three:

for a better understanding of the present invention, the present embodiment is described with reference to more specific examples. Referring to fig. 6, the antenna includes: the antenna comprises a radiation branch section 10, a grounding branch section 20, a feed branch section 30 and a resonant frequency switching circuit 40, wherein the radiation branch section 10 is connected with the grounding branch section 20, the feed branch section 30 and the resonant frequency switching circuit 40, the resonant frequency switching circuit 40 is arranged on the grounding branch section 20, and the resonant frequency switching circuit 40 is used for switching the resonant frequency of the antenna, so that the antenna can work in different frequency bands. In the embodiment of the present invention, since the resonant frequency switching circuit 40 is disposed in the ground branch 20, it is not necessary to separately set a connection point between the resonant frequency switching circuit 40 and the terminal motherboard, thereby reducing the number of connection points between the antenna and the terminal motherboard, reducing the difficulty in setting the antenna, and avoiding the problem of affecting the layout of other devices.

In the embodiment of the present invention, the resonant frequency switching circuit 40 includes a selection circuit 401 and at least two frequency configuration sub-circuits 402, the selection circuit 401 is a combiner, one end of the combiner is connected to the radiation branch 10, the other end of the combiner is connected to each frequency configuration sub-circuit 402, one end of each frequency configuration sub-circuit 402 is connected to the combiner, and the other end of the frequency configuration sub-circuit is grounded. It should be noted that the resonant frequencies of the frequency configuration sub-circuits 402 are different, so that the combiner can perform filtering as needed, thereby implementing the switching of the antenna resonant frequencies. And the combiner is arranged, so that low-frequency switching is easier, the difficulty of antenna frequency is reduced, and the performance of the antenna is improved.

The frequency arrangement sub-circuit 402 may be composed of components such as a capacitor and an inductor, and in order to make the resonant frequency of each frequency arrangement sub-circuit 402 different, the capacitance value of the capacitor and/or the inductance value of the inductor of each frequency arrangement sub-circuit 402 are different.

Example four:

for a better understanding of the present invention, the present embodiment is described with reference to more specific examples. Referring to fig. 7, the antenna includes: radiation branch section 10, ground branch section 20, feed branch section 30 and resonant frequency switching circuit 40, radiation branch section 10 is connected with ground branch section 20, feed branch section 30 and resonant frequency switching circuit 40, and resonant frequency switching circuit 40 sets up at feed branch section 30, and resonant frequency switching circuit 40 is used for switching the resonant frequency of antenna, and like this, the antenna can work in different frequency channels. In the embodiment of the present invention, since the resonant frequency switching circuit 40 is disposed in the feed branch section 30, it is not necessary to separately set a connection point between the resonant frequency switching circuit 40 and the terminal motherboard, thereby reducing the number of connection points between the antenna and the terminal motherboard, reducing the difficulty in setting the antenna, and avoiding the problem of affecting the layout of other devices.

It should be noted that the feeding branch 30 includes a feeding point 301, the feeding point 301 is connected to the radiation branch 10, and the resonant frequency switching circuit 40 is connected in parallel to the feeding point 301.

In the embodiment of the present invention, the resonant frequency switching circuit 40 includes a selection circuit 401 and at least two frequency configuration sub-circuits 402, and the frequencies generated by the frequency configuration sub-circuits 402 are different. The selection circuit 401 may be a multi-selection switch, a fixed end of the multi-selection switch is connected to the radiation branch 10, a selection end of the multi-selection switch is connected to the resonant frequency configuration sub-circuit 402, and the multi-selection switch is used to control a connection state between each frequency configuration sub-circuit 402 and the radiation branch 10, so as to switch the resonant frequency of the antenna. Assuming that the resonant frequency switching circuit includes three frequency configuration sub-circuits (a first frequency configuration sub-circuit, a second frequency configuration sub-circuit, a third resonant frequency configuration sub-circuit) and a three-out-of-one switch, where a frequency of the first frequency configuration sub-circuit is a, a frequency of the second frequency configuration sub-circuit is b, a frequency of the third frequency configuration sub-circuit is c, a fixed end of the three-out-of-one switch is connected with the radiation branch node, three selection ends of the switch are respectively connected with the first frequency configuration sub-circuit, the second frequency configuration sub-circuit and the third frequency configuration sub-circuit, and if the antenna needs to resonate at the frequency a, a dial of the switch is connected with the first frequency configuration sub-circuit, so as to connect the first frequency configuration sub-circuit with the radiation circuit, and enable the antenna to resonate at the frequency a; if the antenna needs to resonate at the frequency b, the shifting sheet of the switch is connected with the second frequency configuration sub-circuit, so that the second frequency configuration sub-circuit is connected with the radiation circuit, and the antenna resonates at the frequency b; if the antenna needs to resonate at the frequency c, the plectrum of the switch is connected with the third frequency configuration sub-circuit, so that the third frequency configuration sub-circuit is connected with the radiation circuit, and the antenna resonates at the frequency c.

The antenna provided by the embodiment of the invention comprises: radiation branch festival, the ground connection branch festival, feed branch festival and resonant frequency switching circuit, radiation branch festival and ground connection branch festival, feed branch festival and resonant frequency switching circuit are connected, wherein, resonant frequency switching circuit sets up in the feed branch festival, resonant frequency switching circuit is used for switching over the resonant frequency of antenna, in some implementation processes, because resonant frequency switching circuit sets up in the feed branch festival, therefore, need not to set up the tie point of resonant frequency switching circuit and terminal mainboard alone, thereby the number of antenna and terminal mainboard tie point has been reduced, the degree of difficulty that sets up of antenna has been reduced, the problem of influencing other device overall arrangements has been avoided.

EXAMPLE five

An embodiment of the present invention provides a terminal including an antenna according to at least one of the first to fourth embodiments. In an embodiment of the present invention, in order to distinguish the antenna according to any one of the first to fourth embodiments from other antennas, the antenna according to any one of the first to fourth embodiments is used as a target antenna.

Wherein the terminal may include at least one antenna.

When the terminal includes at least two antennas, the antennas included in the terminal may all be target antennas, or the terminal may include at least one target antenna, and the remaining antennas may be other antennas (including but not limited to GPS antennas, WIFI antennas, and the like).

When the target antenna is adjacent to the installation position of a certain antenna (the antenna may be the target antenna, or may be another antenna), the installation manner may be: the ground leg of the target antenna is adjacent to its neighboring antenna. For example, referring to fig. 8, it is assumed that the terminal includes two antennas, a first antenna (the antenna positioned on the left in fig. 8) is the antenna shown in fig. 1, a second antenna (the antenna positioned on the right in fig. 8) is a GPS antenna, the second antenna includes a radiation branch 50, a feed branch 60, and a ground branch 70, the radiation branch 50 is connected to the feed branch 60 and the ground branch 70, the first antenna and the second antenna are disposed adjacent to each other, and the ground branch 20 of the first antenna is close to the second antenna.

The terminal provided by the embodiment of the invention comprises a target antenna, wherein the target antenna comprises: radiation branch festival, the ground connection branch festival, feed branch festival and resonant frequency switching circuit, radiation branch festival and ground connection branch festival, feed branch festival and resonant frequency switching circuit are connected, wherein, resonant frequency switching circuit sets up in feed branch festival or ground connection branch festival, resonant frequency switching circuit is used for switching over the resonant frequency of antenna, in some implementation processes, because resonant frequency switching circuit sets up in feed branch festival or ground connection branch festival, consequently, need not to set up the tie point of resonant frequency switching circuit and terminal mainboard alone, thereby the number of antenna and terminal mainboard tie point has been reduced, the degree of difficulty of setting up the antenna in the terminal has been reduced, the problem of influencing other device overall arrangements has been avoided.

It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented as computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.

In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media. Thus, the present invention is not limited to any specific combination of hardware and software.

The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. An antenna, the antenna being a first antenna, the first antenna comprising: the antenna comprises a radiation branch section, a grounding branch section, a feed branch section and a resonant frequency switching circuit;

the radiation branch section is connected with the grounding branch section, the feed branch section and the resonant frequency switching circuit, and the grounding branch section is adjacent to a second antenna;

the resonant frequency switching circuit is arranged in the grounding branch, the resonant frequency switching circuit comprises a selection circuit and at least two frequency configuration sub-circuits, one end of the selection circuit is connected with the radiation branch, the other end of the selection circuit is connected with the frequency configuration sub-circuits, the resonant frequencies of the frequency configuration sub-circuits are different, and the selection circuit is a high-pass filter circuit or a combiner and is used for switching the resonant frequency of the antenna by filtering the frequency generated by the frequency configuration sub-circuits.

2. The antenna of claim 1, wherein the resonant frequency switching circuit is disposed in the feed leg, the resonant frequency switching circuit being in parallel with a feed point in the feed leg, the feed point being connected with the radiating leg.

3. The antenna of claim 1, wherein the resonant frequency switching circuit is disposed in the ground stub, the frequency configuration subcircuit being connected to the selection circuit at one end and to ground at the other end.

4. An antenna according to any of claims 1-3, characterized in that the antenna is an inverted-F antenna, IFA.

5. A terminal comprising an antenna as claimed in any of claims 1 to 4.