CN107317112B - Antenna circuit and mobile terminal - Google Patents
Antenna circuit and mobile terminal Download PDFInfo
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- CN107317112B CN107317112B CN201710482078.5A CN201710482078A CN107317112B CN 107317112 B CN107317112 B CN 107317112B CN 201710482078 A CN201710482078 A CN 201710482078A CN 107317112 B CN107317112 B CN 107317112B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
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Abstract
The invention provides an antenna circuit and a mobile terminal, and relates to the technical field of mobile terminal antennas. The antenna circuit includes: an antenna unit; the frequency band switching circuit is connected with the antenna unit and is connected to a switching circuit connection point of the antenna unit; the frequency band switching circuit realizes the carrier aggregation of low frequency and medium and high frequency. The frequency band switching circuit is arranged at the switching circuit connection point of the antenna unit, and the low-frequency and medium-high-frequency carrier aggregation is realized by using the frequency band switching circuit, so that the antenna can have the low-frequency and medium-high-frequency states at the same time, and the performance of the antenna circuit is improved.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an antenna circuit and a mobile terminal.
Background
In order to increase the internet access rate of the mobile terminal, a multi-CA (carrier aggregation) technology is popular, for example, a "medium frequency + high frequency" CA combination of B39+ B41 in china, and a certain frequency band of low frequency (0.7-0.96 Ghz) such as B5 is proposed by telecommunication operators in china recently, and a "low frequency + medium frequency" CA combination is formed by combining medium frequency (1.71-2.17G) such as B1 and B3. In the future, it is also possible for telecommunication operators to come out "low frequency + high frequency" CA combinations. The multi-CA technology requires that the mobile terminal antenna be able to support these frequency bands simultaneously, rather than the previous time-sharing support, which presents a significant challenge to the mobile terminal antenna.
In recent years, mobile terminals with an integrated all-metal profile (e.g., a three-piece integrated metal profile, a U-slot integrated metal profile) have gained market favor, but such an appearance also presents a significant challenge to the antenna because the antenna bandwidth at medium and high frequencies tends to be narrow. How to implement a multi-CA antenna is still a difficult problem in the industry.
The mobile terminal with the integrated all-metal shape is a U-shaped gap integrated all-metal shape as shown in fig. 1, a three-section integrated all-metal shape as shown in fig. 2, and a middle frame metal battery cover shape as shown in fig. 3; the existing antenna solution is shown in fig. 4, and includes: an antenna unit 40, where a point a of the antenna unit is a tail end of the antenna unit 40, a point C (i.e., a feed point) of the antenna unit is connected to an antenna matching circuit 41, and one end of the antenna matching circuit 41 is connected to an antenna feed 42; the B point (i.e., the switching circuit connection point) of the antenna unit is connected to the low/medium/high frequency switching circuit 43, the D point of the antenna unit 40 is electrically connected to the tuning circuit 44, and the E point of the antenna unit is electrically grounded; the low/medium/high frequency switching circuit 43 completes switching between low frequency and medium/high frequency (low frequency is 0.7-0.96G, medium/high frequency is 1.71-2.69G), and specifically, a switch is arranged in the low/medium/high frequency switching circuit, and is switched off at low frequency and switched on at medium/high frequency. The tuning circuit 44 realizes tuning within a low-frequency range or a medium-high frequency (1.71-2.69G) range, a single-pole multi-throw switch is arranged in the tuning circuit, and each switch branch is connected with an inductor or a capacitor and other devices. By switching different switch branches to the ground, low-frequency tuning or medium-high frequency tuning can be realized so as to cover different frequency band requirements. For example, when the internal switch of the low/medium/high frequency switching circuit is turned off, a low frequency tuning state is entered; as shown in FIG. 5, switch branch 1 is conducted to cover B12 (0.7-0.746G), branch 2 is conducted to cover B5 (0.824-0.894G), and branch 3 is conducted to cover B8 (0.88-0.96G); when an internal switch of the low-frequency/medium-high frequency switching circuit is switched on, the low-frequency/medium-high frequency switching circuit enters a medium-high frequency tuning state; if branch 4 conducts the overlay B3+ B1 (1.71-2.17G), and branch 5 conducts the overlay B40+ B41 (2.3-2.69G). Generally, in a mobile terminal, the antenna units A-C have a length of about 5-25 mm, the antenna units A-B have a length of about 10-25 mm, the antenna units A-E have a length of about 35-55 mm, and the antenna units D-E have a length of about 5-25 mm.
A second common antenna scheme (using Molopole monopole antenna) of the mobile terminal antenna with full metal appearance is shown in fig. 6, and includes: the antenna comprises an antenna unit 60, wherein an antenna matching circuit 61 is connected to the antenna unit 60, and one end of the antenna matching circuit 61 is connected with an antenna feed source 62; the antenna unit 60 is also connected to a tuning circuit 63 and a low/medium/high frequency switching circuit 64, respectively. The low-frequency/medium-high frequency switching circuit 64 is used for switching between low frequency and medium-high frequency (the low frequency is 0.7-0.96G, and the medium-high frequency is 1.71-2.69G), and specifically, a switch is arranged in the low-frequency/medium-high frequency switching circuit, and is switched off at low frequency and switched on at medium-high frequency. The tuning circuit 63 realizes tuning within a low-frequency range or a medium-high frequency (1.71-2.69G) range, a single-pole multi-throw switch is arranged in the tuning circuit, and each switch branch is connected with an inductor or a capacitor and other devices. By switching different switch branches to the ground, low-frequency tuning or medium-high frequency tuning can be realized so as to cover different frequency band requirements. Generally, in a mobile terminal, the antenna unit 11-12 has a length of about 5-25 mm, the antenna unit 13-14 has a length of about 0-20 mm, the antenna unit 11-14 has a length of about 30-45 mm, and the antenna unit 14-15 has a length of about 0-20 mm.
The first antenna scheme or the second antenna scheme has the disadvantage that the low frequency and the medium-high frequency cannot exist at the same time, namely, the low frequency or the medium-high frequency is realized at the same time. The CA state of low frequency + medium and high frequency cannot be realized, and especially, the CA of low frequency + medium frequency is difficult to realize.
Disclosure of Invention
The embodiment of the invention provides an antenna circuit and a mobile terminal, and aims to solve the problems that in the antenna circuit in the prior art, low frequency and medium and high frequency cannot exist at the same time, only one state exists at the same time, and carrier aggregation of the low frequency and the medium and high frequency cannot be realized.
In a first aspect, an embodiment of the present invention provides an antenna circuit, including:
an antenna unit;
the frequency band switching circuit is connected with the antenna unit and is connected to a switching circuit connection point of the antenna unit;
the frequency band switching circuit realizes the carrier aggregation of low frequency and medium and high frequency.
In a second aspect, an embodiment of the present invention further provides a mobile terminal, including the antenna circuit described above.
In this way, in the embodiment of the present invention, the frequency band switching circuit is disposed at the switching circuit connection point of the antenna unit, and the carrier aggregation of the low frequency and the medium and high frequency is realized by using the frequency band switching circuit, so that the antenna unit can have the states of the low frequency and the medium and high frequency at the same time, and the performance of the antenna circuit is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a U-shaped slot integrated mobile terminal with a full metal appearance;
FIG. 2 is a schematic structural diagram of a three-section integrated mobile terminal with an all-metal appearance;
FIG. 3 is a schematic diagram of a mobile terminal showing the shape of a metal battery cover of a middle frame;
FIG. 4 illustrates one of the components of the antenna structure;
FIG. 5 is a schematic diagram of the tuning circuit;
FIG. 6 is a second schematic diagram of the antenna structure;
fig. 7 is a schematic structural diagram of an antenna circuit according to an embodiment of the present invention;
fig. 8 is a second schematic diagram of an antenna circuit according to an embodiment of the invention;
fig. 9 is a third schematic diagram of an antenna circuit according to an embodiment of the present invention;
FIG. 10 is a graph of antenna efficiency for multiple CAs at LF B5+ IF B1+ IF B3;
FIG. 11 is a graph of antenna efficiency versus B13+ B40 multi-CA;
fig. 12 is a graph comparing antenna efficiency of B8 in the non-CA state;
fig. 13 is a graph comparing antenna efficiency of B5 in the non-CA state;
fig. 14 is a fourth schematic diagram of an antenna circuit according to an embodiment of the invention;
fig. 15 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 7, an embodiment of the present invention provides an antenna circuit, including:
an antenna unit 710;
a band switching circuit 720 connected to the antenna unit 710, wherein the band switching circuit 720 is connected to a switching circuit connection point B of the antenna unit 710;
the band switching circuit 720 implements carrier aggregation for low and medium-high frequencies.
Optionally, the first configuration manner of the frequency band switching circuit 720 is:
the band switching circuit 720 includes:
one end of the high-pass filter circuit is connected with the switching circuit connection point of the antenna unit 710, and the other end of the high-pass filter circuit is grounded;
the high-pass filter circuit is used for realizing carrier aggregation of low frequency, medium and high frequency.
Specifically, as shown in fig. 8, the high-pass filter circuit mainly includes:
a first inductor 721, a first capacitor 722, and a second inductor 723;
wherein a first terminal of the first inductor 721 is connected to a first terminal of the first capacitor 722, and is connected to a first terminal of the second inductor 723 at a connection point where the first terminal of the first inductor 721 is connected to the first terminal of the first capacitor 722; a second terminal of the first inductor 721 is connected to a second terminal of the first capacitor 722, and is grounded at a connection point where the second terminal of the first inductor 721 is connected to the second terminal of the first capacitor 722; a second terminal of the second inductor 723 is connected to a switching circuit point B of the antenna unit 710.
It should be noted that in this implementation, at least one of the first inductor 721, the first capacitor 722 and the second inductor 723 is an adjustable device, that is, the inductor is an adjustable inductor, and the capacitor is an adjustable capacitor; in a specific application, it is only necessary to set a capacitor (i.e., the first capacitor 722) as an adjustable capacitor, and different frequency bands correspond to different capacitance values, for example, when B5 (824-894M), the capacitance value C is 3 pf; b8 (880-960M), the capacitance C is 2.4 pf; b12 (699-746M), the capacitance C is 4.3 pf. That is, the resonant frequency of the parallel resonant circuit of the first inductor 721 and the first capacitor 722 is adjusted, so that the corresponding low frequency band exhibits high impedance characteristics. In order to further improve the if characteristic, the inductor (i.e., the second inductor 723) connected in series is also changed to an adjustable inductor, for example, when B3 (1.71-1.88G), the inductance L is 4.7 nH; and in the case of B1(1.92 to 2.17G), the inductance L is 3.9 nH.
Optionally, the second configuration manner of the frequency band switching circuit 720 is:
the band switching circuit 720 includes:
one end of the high-pass filter circuit is connected with the switching circuit connection point of the antenna unit 710, and the other end of the high-pass filter circuit is grounded;
the high-pass filter circuit is used for realizing carrier aggregation of low frequency, medium and high frequency;
a switch;
the first end of the change-over switch is connected with a connection point of a change-over circuit of the antenna unit, and the second end of the change-over switch is connected with one end of the high-pass filter circuit.
Specifically, as shown in fig. 9, the band switching circuit 720 in such a configuration mainly includes:
a first inductor 721, a first capacitor 722, a second inductor 723 and a switch 724;
wherein a first terminal of the first inductor 721 is connected to a first terminal of the first capacitor 722, and is connected to a first terminal of the second inductor 723 at a connection point where the first terminal of the first inductor 721 is connected to the first terminal of the first capacitor 722; a second terminal of the first inductor 721 is connected to a second terminal of the first capacitor 722, and is grounded at a connection point where the second terminal of the first inductor 721 is connected to the second terminal of the first capacitor 722; a second end of the second inductor 723 is connected to a switching circuit connection point of the antenna unit 710; a first end of the switch 724 is connected to a switching circuit connection point of the antenna unit 710, and a second end of the switch 724 is connected to a second end of the second inductor 723.
When the circuit is applied, when the low-frequency + medium-high frequency CA state occurs, the switch 724 is switched on; the high-pass filter circuit is open-circuited in a certain frequency band (such as B5) of the low frequency, so that the low frequency is realized, meanwhile, the medium-high frequency is still conducted, and the medium-high frequency signal passing influence is small. When in the non-CA low frequency state, the switch 724 is turned off, thereby eliminating the low frequency effect of the high pass filter circuit due to the narrow band characteristic. When the signal is in a non-CA middle-high frequency state, the switch 724 is turned on, the high-pass filter circuit is equivalent to middle-high frequency conduction at the moment, and the passing influence of middle-high frequency signals is small.
In addition, the band switching circuit 720 has special requirements: the medium-high frequency is conducted, and the low frequency is open. Common high-pass filter circuit characteristics are: the medium-high frequency is conductive, but the low frequency is short-circuited to ground.
In this embodiment, a new circuit structure is designed, that is, the first inductor 721 and the first capacitor 722 form a parallel resonant circuit, the resonant frequency range may be (0.7-0.96G), so as to implement the characteristic of low-frequency open circuit, and the medium-high frequency is equivalent to a capacitor at this time, and then form a series resonant circuit with the second inductor 723, and the resonant frequency range may be (1.71-2.69G), so as to implement the characteristic of medium-high frequency short circuit.
It should be noted that, in this implementation, each component in the high-pass filter circuit is non-adjustable, that is, a fixed value is used; the values of the components in the high-pass filter circuit (where the inductance value of the first inductor 721 is represented by L1, the capacitance value of the first capacitor 722 is represented by C1, and the inductance value of the second inductor 723 is represented by L2) may be in various combinations, for example: combination 1(L1 ═ 18nH, C1 ═ 1.8pf, L2 ═ 5.6nH), combination 2(L1 ═ 12nH, C1 ═ 2.7pf, L2 ═ 4.7nH), combination 3(L1 ═ 8.2nH, C1 ═ 3.9pf, L2 ═ 3.9 nH). Combination 1 has better low-frequency performance but poor medium-high frequency performance, and combination 3 has better medium-high frequency performance but poor low-frequency performance, and the best value is combination 2 after the trial. As shown in table 1 (table 1 shows equivalent inductance values or capacitance values of combinations 1, 2, and 3 at respective frequency points commonly used in mobile terminals), the equivalent inductance values or capacitance values of combinations 1, 2, and 3 at respective frequency points commonly used in mobile terminals are shown. As can be seen, the circuit has a narrow-band frequency response characteristic, for example, in the range of 0.824-0.88 Ghz, the inductance is large, and the circuit can be regarded as an open circuit. However, the inductance of 0.7-0.824G is gradually reduced along with the reduction of the frequency, and the circuit can not be regarded as a complete open circuit gradually and still has certain influence; the capacitance of 0.88-0.96G is gradually increased along with the frequency increase, and the circuit cannot be regarded as a complete open circuit or has a certain influence. In addition, the inductance of the middle-high frequency part (1.71-2.69G) is between 0.3-3.4 nH, and the middle-high frequency part has certain influence along with the increase of the frequency.
TABLE 1
It should be noted that, because the actual high-pass filter circuit has obvious narrow-band characteristics, a switch 724 is added, and the switch 724 can improve the bandwidth that the high-pass filter circuit can actually achieve.
The following description of the test result of the antenna efficiency when the combination 2 is selected for each component in the high-pass filter circuit is as follows:
as shown in FIG. 10, a comparison graph of the efficiency of the low-frequency B5 (0.824-0.894G), the intermediate-frequency B1 (1.92-2.17G), the intermediate-frequency B3 (1.71-1.88G) and the multi-CA antenna is shown, after a high-pass filter circuit is added, the efficiency of the low-frequency B5 is (-7.8 dB-12 dB, the original efficiency is lower than-22 dB), the efficiency of the intermediate-frequency B3517 is slightly reduced, and the efficiency of the high-frequency B353-2.69G is improved.
As shown in FIG. 11, a comparison graph of the efficiency of B13 (0.746-0.787G) + B40 (2.3-2.4G) multi-CA antenna is shown, and after a high-pass filter circuit is added, the efficiency of low-frequency B13 is generated (from-7.5 dB to-9.5 dB, the original efficiency is lower than-22 dB), and the difference of the efficiency of high-frequency B40 is small.
As shown in FIG. 12, the antenna efficiency of B8 (0.88-0.96G) in the non-CA state is plotted. After the high-pass filter circuit is added, the efficiency of B8 is improved by 0.5-1 dB, because the high-pass filter circuit enables the low frequency to present an open circuit effect, and the influence of parasitic parameters (such as parasitic capacitance) of the switch is reduced. However, medium-high frequency efficiency is too low and medium-high frequency is not available.
As shown in FIG. 13, the antenna efficiency in the non-CA state B5 (0.824-0.894G) is plotted against the antenna efficiency. After the high-pass filter circuit is added, the efficiency of B5 is improved by 0.5-1 dB. This is because the high-pass filter circuit causes the low frequency to exhibit an open circuit effect, reducing the influence of parasitic parameters (e.g., parasitic capacitance) of the switch. However, medium-high frequency efficiency is too low and medium-high frequency is not available.
Optionally, the third configuration manner of the frequency band switching circuit 720 is as follows:
the band switching circuit 720 includes:
one end of the high-pass filter circuit is connected with the switching circuit connection point of the antenna unit 710, and the other end of the high-pass filter circuit is grounded;
the high-pass filter circuit is used for realizing carrier aggregation of low frequency, medium and high frequency.
The high-pass filter circuit mainly comprises: a broadband phase shifter;
a first end of the broadband phase shifter is connected to a connection point of the switching circuit of the antenna unit 710, and a second end of the broadband phase shifter is grounded.
The broadband phase shifter is used for adjusting the phase of the low frequency and the medium and high frequency, the complexity of the high-pass filter circuit is reduced, and the carrier aggregation of the low frequency and the medium and high frequency can be realized.
For example, broadband phase shifter products with low frequency shifted by 90 degrees and medium and high frequency shifted by 180 degrees exist in the industry at present. A broadband phase shifter is generally used for phase adjustment, but here is used as a high pass filter. Only one end of the broadband phase shifter needs to be grounded, at the moment, the low frequency is open-circuited after shifting the phase by 90 degrees, and the medium-high frequency is shifted by 180 degrees and is also short-circuited to the ground.
In some configurations of the band switching circuit 720, the antenna circuit includes:
an antenna matching circuit 731;
a first end of the antenna matching circuit 731 is connected to a feeding point (i.e., point C in the figure) of the antenna element 710, and a second end of the antenna matching circuit 731 is connected to an antenna feed 732; and
a coordinator circuit 740 connected to the antenna unit, the coordinator circuit 740 being connected to a point D in the figure;
the coordination circuit 740 includes: a second switch 741, a fourth inductor 742, and a second capacitor 743;
a first end of the fourth inductor 742 is connected to the first end of the second capacitor 743, and is grounded at a connection point where the first end of the fourth inductor 742 is connected to the first end of the second capacitor 743, a first end of the second switch 741 is connected to the antenna unit 710, and a second end of the second switch 741 is used for being connected to the second end of the fourth inductor 742 or the second end of the second capacitor 743.
In the above-mentioned several configurations of the band switching circuit 720, the antenna circuit is applied to a mobile terminal with an integrated all-metal external shape, the point a of the antenna circuit is shown as the end of the antenna unit, and the point E is grounded.
Optionally, the fourth configuration manner of the frequency band switching circuit 720 is as follows:
as shown in fig. 14, in addition to the second configuration, the second configuration further includes:
a medium-high frequency tuning circuit 750;
the middle and high frequency tuning circuit 750 includes: a third inductor 751 and a first switch 752;
a first terminal of the first switch 752 is connected to the first terminal of the switch 724, a second terminal of the first switch 752 is connected to the first terminal of the third inductor 751, and a second terminal of the third inductor 751 is connected to the second terminal of the switch 724.
In this case, only the low frequency tuning function is retained in the coordination circuit. In order to realize multi-CA, the middle and high frequency tuning circuit should also pass through a high-pass filter circuit, and D and B can be connected to the same point, and the distance from B to A is still about 10-25 mm.
It should be noted that the implementation principle of the antenna circuit of the mobile terminal adopting the Molopole monopole antenna form is the same as that of the antenna circuit of the mobile terminal adopting the integrated all-metal appearance, and is not described herein again.
It should be noted that the antenna circuit can simultaneously implement carrier aggregation of low frequency and medium and high frequency, so that the antenna circuit can simultaneously have the states of low frequency and medium and high frequency at the same time, and the performance of the antenna circuit is improved.
An embodiment of the present invention further provides a mobile terminal, including the antenna circuit described above.
The mobile terminal comprises at least one of a mobile phone, a tablet computer, a personal digital assistant and a vehicle-mounted computer.
It should be noted that, the mobile terminal provided with the antenna circuit improves the communication performance of the mobile terminal and improves the user experience.
Fig. 15 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. Specifically, the mobile terminal in fig. 15 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), or a vehicle-mounted computer.
The mobile terminal in fig. 15 includes a Radio Frequency (RF) circuit 1510, a memory 1520, an input unit 1530, a display unit 1540, a processor 1550, an audio circuit 1560, a wifi (wireless fidelity) module 1570, a power supply 1580, and a battery connector 1590.
Among other things, the input unit 1530 may be used to receive numerical or character information input by a user and to generate signal inputs related to user settings and function control of the mobile terminal. Specifically, in the embodiment of the present invention, the input unit 1530 may include a touch panel 1531. The touch panel 1531, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of the user on the touch panel 1531 by using a finger, a stylus, or any other suitable object or accessory) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 1531 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 1550, and can receive and execute commands sent from the processor 1550. In addition, the touch panel 1531 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1531, the input unit 1530 may also include other input devices 1532, and the other input devices 1532 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
Among them, the display unit 1540 may be used to display information input by a user or information provided to the user and various menu interfaces of the mobile terminal. The display unit 1540 may include a display panel 1541, and optionally, the display panel 1541 may be configured in the form of an LCD or an Organic Light-Emitting Diode (OLED).
It should be noted that the touch panel 1531 may cover the display panel 1541 to form a touch display screen, and when the touch display screen detects a touch operation thereon or nearby, the touch display screen is transmitted to the processor 1550 to determine the type of the touch event, and then the processor 1550 provides a corresponding visual output on the touch display screen according to the type of the touch event.
The touch display screen comprises an application program interface display area and a common control display area. The arrangement modes of the application program interface display area and the common control display area are not limited, and can be an arrangement mode which can distinguish two display areas, such as vertical arrangement, left-right arrangement and the like. The application interface display area may be used to display an interface of an application. Each interface may contain at least one interface element such as an icon and/or widget desktop control for an application. The application interface display area may also be an empty interface that does not contain any content. The common control display area is used for displaying controls with high utilization rate, such as application icons like setting buttons, interface numbers, scroll bars, phone book icons and the like.
The processor 1550 is a control center of the mobile terminal, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or executing software programs and/or modules stored in the first memory 1521 and calling data stored in the second memory 1522, thereby integrally monitoring the mobile terminal. Optionally, processor 1550 may include one or more processing units.
It should be noted that the Radio Frequency (RF) circuit 1510 includes: an antenna unit;
the frequency band switching circuit is connected with the antenna unit and is connected to a switching circuit connection point of the antenna unit;
the frequency band switching circuit realizes the carrier aggregation of low frequency and medium and high frequency.
Specifically, the frequency band switching circuit includes:
one end of the high-pass filter circuit is connected with the switching circuit connection point of the antenna unit, and the other end of the high-pass filter circuit is grounded;
the high-pass filter circuit is used for realizing carrier aggregation of low frequency, medium and high frequency.
Specifically, the high-pass filter circuit includes:
the first inductor, the first capacitor and the second inductor;
the first end of the first inductor is connected with the first end of the first capacitor, and is connected with the first end of the second inductor at a connection point where the first end of the first inductor is connected with the first end of the first capacitor; the second end of the first inductor is connected with the second end of the first capacitor, and the connection point of the second end of the first inductor and the second end of the first capacitor is grounded; and the second end of the second inductor is connected with the switching circuit connection point of the antenna unit.
Wherein at least one of the first inductance, the first capacitance, and the second inductance is an adjustable device.
Specifically, the frequency band switching circuit further includes:
a switch;
the first end of the change-over switch is connected with a connection point of a change-over circuit of the antenna unit, and the second end of the change-over switch is connected with one end of the high-pass filter circuit.
Optionally, the Radio Frequency (RF) circuit 1510 further includes:
a medium-high frequency tuning circuit;
the medium-high frequency tuning circuit comprises: a third inductor and a first switch;
the first end of the first switch is connected with the first end of the change-over switch, the second end of the first switch is connected with the first end of the third inductor, and the second end of the third inductor is connected with the second end of the change-over switch.
Specifically, the high-pass filter circuit includes:
a broadband phase shifter;
the first end of the broadband phase shifter is connected with the switching circuit connection point of the antenna unit, and the second end of the broadband phase shifter is grounded.
Specifically, the Radio Frequency (RF) circuit 1510 further includes:
an antenna matching circuit;
the first end of the antenna matching circuit is connected with the feed point of the antenna unit, and the second end of the antenna matching circuit is connected with the antenna feed source.
Specifically, the Radio Frequency (RF) circuit 1510 further includes:
a coordination circuit connected to the antenna unit;
the coordination circuit includes: the second switch, the fourth inductor and the second capacitor;
the first end of the fourth inductor is connected with the first end of the second capacitor, the connection point where the first end of the fourth inductor is connected with the first end of the second capacitor is grounded, the first end of the second switch is connected with the antenna unit, and the second end of the second switch is used for being connected with the second end of the fourth inductor or the second end of the second capacitor.
According to the mobile terminal provided by the embodiment of the invention, the frequency band switching circuit is arranged at the switching circuit connection point of the antenna unit, and the low-frequency and medium-high-frequency carrier aggregation is realized by using the frequency band switching circuit, so that the antenna circuit can have the low-frequency and medium-high-frequency states at the same time, the performance of the antenna circuit is improved, the communication performance of the mobile terminal is further improved, and the use experience of a user is improved.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (8)
1. An antenna circuit, comprising:
an antenna unit;
the frequency band switching circuit is connected with the antenna unit and is connected to a switching circuit connection point of the antenna unit;
the frequency band switching circuit realizes the carrier aggregation of low frequency and medium and high frequency;
the first end of the antenna matching circuit is connected with the feed point of the antenna unit, and the second end of the antenna matching circuit is connected with the antenna feed source;
the frequency band switching circuit comprises:
one end of the high-pass filter circuit is connected with the switching circuit connection point of the antenna unit, and the other end of the high-pass filter circuit is grounded;
the high-pass filter circuit is used for realizing carrier aggregation of low frequency, medium and high frequency;
the high-pass filter circuit comprises:
the first inductor, the first capacitor and the second inductor;
the first end of the first inductor is connected with the first end of the first capacitor, and is connected with the first end of the second inductor at a connection point where the first end of the first inductor is connected with the first end of the first capacitor; the second end of the first inductor is connected with the second end of the first capacitor, and the connection point of the second end of the first inductor and the second end of the first capacitor is grounded; and the second end of the second inductor is connected with the switching circuit connection point of the antenna unit.
2. The antenna circuit of claim 1, wherein at least one of the first inductance, the first capacitance, and the second inductance is an adjustable device.
3. The antenna circuit of claim 1, wherein the band switching circuit further comprises:
a switch;
the first end of the change-over switch is connected with a connection point of a change-over circuit of the antenna unit, and the second end of the change-over switch is connected with one end of the high-pass filter circuit.
4. The antenna circuit of claim 3, further comprising:
a medium-high frequency tuning circuit;
the medium-high frequency tuning circuit comprises: a third inductor and a first switch;
the first end of the first switch is connected with the first end of the change-over switch, the second end of the first switch is connected with the first end of the third inductor, and the second end of the third inductor is connected with the second end of the change-over switch.
5. The antenna circuit of claim 1, wherein the high pass filter circuit comprises:
a broadband phase shifter;
the first end of the broadband phase shifter is connected with the switching circuit connection point of the antenna unit, and the second end of the broadband phase shifter is grounded.
6. The antenna circuit of claim 1, further comprising:
a coordination circuit connected to the antenna unit;
the coordination circuit includes: the second switch, the fourth inductor and the second capacitor;
the first end of the fourth inductor is connected with the first end of the second capacitor, the connection point where the first end of the fourth inductor is connected with the first end of the second capacitor is grounded, the first end of the second switch is connected with the antenna unit, and the second end of the second switch is used for being connected with the second end of the fourth inductor or the second end of the second capacitor.
7. A mobile terminal, characterized in that it comprises an antenna circuit according to any one of claims 1 to 6.
8. The mobile terminal of claim 7, wherein the mobile terminal comprises at least one of a cell phone, a tablet computer, a personal digital assistant, and a vehicle-mounted computer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482078.5A CN107317112B (en) | 2017-06-22 | 2017-06-22 | Antenna circuit and mobile terminal |
| PCT/CN2018/087639 WO2018233421A1 (en) | 2017-06-22 | 2018-05-21 | Antenna circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710482078.5A CN107317112B (en) | 2017-06-22 | 2017-06-22 | Antenna circuit and mobile terminal |
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| Publication Number | Publication Date |
|---|---|
| CN107317112A CN107317112A (en) | 2017-11-03 |
| CN107317112B true CN107317112B (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710482078.5A Active CN107317112B (en) | 2017-06-22 | 2017-06-22 | Antenna circuit and mobile terminal |
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| Country | Link |
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| CN (1) | CN107317112B (en) |
| WO (1) | WO2018233421A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317112B (en) * | 2017-06-22 | 2020-04-17 | 维沃移动通信有限公司 | Antenna circuit and mobile terminal |
| CN108110423B (en) * | 2017-12-14 | 2020-03-10 | Oppo广东移动通信有限公司 | Antenna tuning circuit, antenna device and mobile terminal |
| CN108336483B (en) * | 2018-02-02 | 2021-03-02 | Oppo广东移动通信有限公司 | Antenna assembly, electronic equipment and antenna switching method |
| CN108336509B (en) * | 2018-02-07 | 2021-02-19 | Oppo广东移动通信有限公司 | Antenna assembly, electronic equipment and antenna control method |
| CN109687111B (en) * | 2018-12-29 | 2021-03-12 | 维沃移动通信有限公司 | Antenna structure and communication terminal |
| CN114006181A (en) * | 2019-02-18 | 2022-02-01 | 荣耀终端有限公司 | Tuning device, antenna device and terminal equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9128177B2 (en) * | 2013-05-29 | 2015-09-08 | Nokia Technologies Oy | Band grouping combinations for tunable UMTS multi-band filters |
| CN104485512B (en) * | 2014-11-28 | 2018-02-06 | 深圳市信维通信股份有限公司 | For the LTE carrier aggregation antenna with metal framework portable set |
| CN104505589B (en) * | 2014-12-10 | 2018-03-23 | 深圳市信维通信股份有限公司 | LTE carrier aggregation antenna with full metal jacket portable set |
| CN105897280B (en) * | 2016-04-08 | 2018-09-04 | 广东欧珀移动通信有限公司 | A kind of antenna tuning circuit and mobile terminal |
| CN107317112B (en) * | 2017-06-22 | 2020-04-17 | 维沃移动通信有限公司 | Antenna circuit and mobile terminal |
-
2017
- 2017-06-22 CN CN201710482078.5A patent/CN107317112B/en active Active
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| WO2018233421A1 (en) | 2018-12-27 |
| CN107317112A (en) | 2017-11-03 |
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