CN108390149B - Harmonic suppression device, antenna assembly and electronic device - Google Patents
Harmonic suppression device, antenna assembly and electronic device Download PDFInfo
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- 238000004891 communication Methods 0.000 abstract description 4
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The application provides a harmonic suppression device, an antenna assembly and an electronic device. The harmonic suppression apparatus includes: the demodulation unit is used for demodulating a first mixed signal obtained by the receiving antenna from the electromagnetic wave signal received in the space to obtain a plurality of first harmonic signals; the judging unit is used for respectively judging whether the power of each first harmonic signal is greater than a first preset power; the phase inversion unit is used for inverting a first harmonic signal with power greater than first preset power to obtain a first inverted harmonic signal, and when the first inverted harmonic signal is loaded in the transmitting antenna, at least part of radiation stray caused by the fact that the transmitting antenna radiates a first electromagnetic wave signal in a first frequency band is eliminated, wherein when the transmitting antenna radiates the first electromagnetic wave signal in the first frequency band, the receiving antenna receives the first mixed signal. The harmonic suppression device is favorable for suppressing radiation stray and improving communication quality.
Description
Technical Field
The present application relates to the field of electronic devices, and in particular, to a harmonic suppression apparatus, an antenna assembly, and an electronic apparatus.
Background
With the development of mobile communication technology, electronic devices (especially mobile phones) have developed various forms and materials. The metal rear cover enables the electronic device to be more gorgeous in appearance and more wear-resistant, so that the rear cover (battery cover) of the electronic device is gradually mainstream and made of metal. When an electronic device communicates with other electronic devices, an antenna is often required to radiate electromagnetic wave signals, and the antenna is required to receive electromagnetic wave signals sent by other electronic devices. However, when the electronic device with a metal shell emits electromagnetic wave signals, the radiated stray is easy to exceed the standard. The stray radiation is a mandatory certification index of electronic equipment, and particularly, in a Global System for mobile Communication (GSM) frequency band, the stray radiation exceeds the standard due to the high power of GSM itself.
Disclosure of Invention
The application provides a harmonic suppression device, the harmonic suppression device includes:
the demodulation unit is used for demodulating a first mixed signal obtained by the receiving antenna from the electromagnetic wave signal received in the space to obtain a plurality of first harmonic signals;
the judging unit is used for respectively judging whether the power of each first harmonic signal is greater than a first preset power;
the phase inversion unit is used for inverting the phase of a first harmonic signal with power greater than first preset power to obtain a first inverted harmonic signal, and when the first inverted harmonic signal is loaded in the transmitting antenna, at least part of radiation stray caused by the fact that the transmitting antenna radiates a first electromagnetic wave signal in a first frequency band is eliminated.
The present application further provides an antenna assembly, comprising: the harmonic suppression device comprises a demodulation unit, a judgment unit and an inversion unit, wherein the demodulation unit is used for demodulating the first mixed signal to obtain a plurality of first harmonic signals, the judgment unit is used for respectively judging whether the power of each first harmonic signal is greater than a first preset power, the inversion unit is used for inverting the first harmonic signal with the power greater than the first preset power to obtain a first inverted harmonic signal, the first inverse harmonic signal is used for eliminating at least part of radiation stray caused by radiation of a first electromagnetic wave signal of a first frequency band by the transmitting antenna when the first inverse harmonic signal is loaded in the transmitting antenna, wherein when the first electromagnetic wave signal of the first frequency band is radiated by the transmitting antenna, the first mixed signal is received by the receiving antenna.
Compared with the prior art, the harmonic suppression device demodulates a first mixed signal obtained by a receiving antenna from an electromagnetic wave signal received in space to obtain a plurality of first harmonic signals, and inverts the first harmonic signal with the power larger than the first preset power to obtain a first inverted harmonic signal, and when the first inverted harmonic signal is loaded in the transmitting antenna, at least part of radiation stray caused by the first electromagnetic wave signal of the first frequency band radiated by the transmitting antenna is eliminated.
The present application further provides an electronic device including the antenna assembly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a harmonic suppression apparatus according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an antenna assembly according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 inventive step, are within the scope of the present disclosure.
In the description of the embodiments of the present application, it should be understood that the terms "thickness" and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, and do not imply or indicate that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
The stray radiation is a mandatory certification index of electronic equipment, and particularly, in a global system for Mobile Communication (GSM) frequency band, the stray radiation exceeds the standard due to the high power of GSM itself. For example, in one embodiment, when the transmitting antenna in the antenna assembly radiates the first electromagnetic wave signal in the first frequency band according to the first excitation signal, due to the existence of the linear devices (e.g., the fingerprint support, the fingerprint chip, the USB socket, the tuning switch of the antenna, etc.) around the antenna assembly, due to the nonlinear function of these nonlinear devices, the nonlinear devices tend to generate harmonics such as the second harmonic or the third harmonic according to the first electromagnetic wave signal in the first frequency band. When the size of the nonlinear device is exactly matched to the size of the radiated harmonics, the nonlinear device radiates these harmonics out, resulting in the radiated spurs exceeding the standard. For the first electromagnetic wave signal of the first frequency band, the second harmonic wave, the third harmonic wave and other harmonics constitute radiation stray. Generally, matching the size of the nonlinear device to the size of the radiated harmonic refers to: the electrical length of the nonlinear device is equal to one quarter of the harmonic. For a rectangular nonlinear device, the electrical length of the nonlinear device is the length of the long side of the nonlinear device; for a non-linear device that is circular in shape, the electrical length of the non-linear device is the perimeter of the non-linear device. Therefore, for a rectangular nonlinear device, when the length of the long side of the nonlinear device is equal to a quarter of the wavelength of the harmonic wave, the size of the nonlinear device is matched with the size of the radiated harmonic wave, and the nonlinear device can radiate the harmonic wave; for a non-linear device that is shaped as an arc of a circle, when the perimeter of the non-linear device that is shaped as an arc of a circle is equal to one quarter of the wavelength of a harmonic, then the size of the non-linear device matches the size of the radiating harmonic, and then the non-linear device can radiate the harmonic out. In addition, when the size of the transmitting antenna 200 is matched with the size of the radiated harmonic, the harmonic generated on the nonlinear device can also be transmitted to the transmitting antenna 200 along the relevant path to be radiated by the transmitting antenna 200. These harmonics are radiated out, which leads to spurious emissions exceeding the standard.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a harmonic suppression device according to an embodiment of the present disclosure. The harmonic suppression apparatus 400 includes a demodulation unit 410, a determination unit 420, and an inversion unit 430. The function of each unit is described below.
The demodulation unit 410 is configured to demodulate a first mixed signal obtained by the receiving antenna 300 from an electromagnetic wave signal received in space, so as to obtain a plurality of first harmonic signals.
When the transmitting antenna 200 in the antenna assembly 10 radiates the first electromagnetic wave signal of the first frequency band according to the first excitation signal, the receiving antenna 300 in the antenna assembly 10 receives the electromagnetic wave signal from the space, so as to obtain a first mixed signal. At this time, the electromagnetic wave signals received by the receiving antenna 300 in the antenna assembly 10 from the space include the first electromagnetic wave signal of the first frequency band and the respective harmonic signals (e.g., the second harmonic signal, the third harmonic signal, etc.) of the first electromagnetic wave signal of the first frequency band. If the first mixed signal is completely demodulated, a first baseband signal corresponding to the first electromagnetic wave signal of the first frequency band and a plurality of first harmonic signals are obtained. In the present embodiment, demodulation section 410 demodulates the first mixed signal to obtain a plurality of first harmonic signals.
The determining unit 420 is configured to determine whether the power of each first harmonic signal is greater than a first preset power. When a first harmonic signal with power greater than the first preset power exists, the radiation stray caused by the first harmonic signal with power greater than the first preset power is considered to be large, and the first harmonic signal with power greater than the first preset power needs to be suppressed. In other words, when the power of the first harmonic signal is greater than the first predetermined power, the first harmonic signal is considered to cause the radiation stray. It is understood that the first preset power may be set according to actual conditions.
The phase inverting unit 430 is configured to invert a first harmonic signal with power greater than a first preset power to obtain a first inverted harmonic signal, where the first inverted harmonic signal is used to eliminate at least part of radiation stray caused by the transmission antenna 200 radiating a first electromagnetic wave signal in a first frequency band when the first inverted harmonic signal is loaded in the transmission antenna 200. When the transmitting antenna radiates the first electromagnetic wave signal of the first frequency band, the receiving antenna receives the first mixed signal.
Compared with the prior art, the harmonic suppression device 400 demodulates the first mixed signal obtained by the electromagnetic wave signal received by the receiving antenna from the space to obtain a plurality of first harmonic signals, and inverts the first harmonic signal with the power greater than the first preset power to obtain a first inverted harmonic signal, and when the first inverted harmonic signal is loaded in the transmitting antenna, at least part of radiation stray caused by the first electromagnetic wave signal of the first frequency band radiated by the transmitting antenna is eliminated.
The demodulation unit 410 is further configured to demodulate the first mixed signal to obtain a first baseband signal corresponding to the first electromagnetic wave signal in the first frequency band. Accordingly, the harmonic suppression apparatus 400 further includes: and a combining unit 440. The combining unit 440 is configured to combine the first baseband signal with the first inverse harmonic signal; the combined first baseband signal and the first inverse harmonic signal are applied to the transmitting antenna 200.
The harmonic suppression apparatus 400 further includes: a monitoring unit 450 and a retrieving unit 460, each of which is described in detail below.
The monitoring unit 450 is configured to monitor whether the excitation signal received by the receiving antenna 300 is switched from a first excitation signal to a second excitation signal, where the transmitting antenna 200 generates a first electromagnetic wave signal in a first frequency band according to the first excitation signal, and the transmitting antenna 200 generates a first electromagnetic wave signal in a second frequency band according to the second excitation signal. Specifically, the monitoring unit 450 is configured to detect the frequency of the excitation signal emitted by the excitation source 100 at preset time intervals to determine whether the excitation signal emitted by the excitation source 100 is switched from a first excitation signal to a second excitation signal. It is to be understood that, in another embodiment, the monitoring unit 450 is further configured to determine whether the excitation signal emitted by the excitation source 100 is switched from the first excitation signal to the second excitation signal according to the frequency of the first harmonic signal. For example, when the excitation source 100 emits the first excitation signal and the receiving antenna 300 generates the electromagnetic wave signal of GSM900MHZ according to the first excitation signal, the frequency of the second harmonic generated by the non-linear device around the electronic device 1 according to the electromagnetic wave signal of GSM900MHZ is 1800MHZ, the frequency of the third harmonic generated by the non-linear device according to the electromagnetic wave signal of GSM900MHZ is 2700MHZ, and the frequency of the N-th harmonic generated by the non-linear device according to the electromagnetic wave signal of GSM900MHZ is (900 × N) MHZ, where N is a positive integer. When the excitation source 100 emits the second excitation signal and the receiving antenna 300 generates the electromagnetic wave signal of GSM800 according to the second excitation signal, the frequency of the second harmonic generated by the nonlinear device around the electronic device 1 according to the electromagnetic wave signal of GSM800MHZ is 1600MHZ, the frequency of the third harmonic generated by the nonlinear device according to the electromagnetic wave signal of GSM800MHZ is 2400 MHZ. Therefore, the detection unit can determine whether the excitation signal emitted by the excitation source 100 is switched from the first excitation signal to the second excitation signal according to the frequency of the first harmonic signal.
When the monitoring unit 450 monitors that the first excitation signal is switched to the second excitation signal, the retrieving unit 460 retrieves a pre-stored second inverse harmonic signal, where the second inverse harmonic signal is used to eliminate at least part of radiation stray caused by the transmission antenna 200 radiating the first electromagnetic wave signal in the second frequency band.
It is to be understood that, in other embodiments, when the monitoring unit 450 monitors that the first excitation signal is switched to the second excitation signal, the demodulating unit 410 is further configured to demodulate a second mixed signal obtained by the receiving antenna 300 from the electromagnetic wave signal received in the space to obtain a plurality of second harmonic signals. When the transmitting antenna 200 in the antenna assembly 10 radiates the first electromagnetic wave signal of the second frequency band according to the second excitation signal, the receiving antenna 300 in the antenna assembly 10 receives the electromagnetic wave signal from the space, so as to obtain a second mixed signal. At this time, the electromagnetic wave signals received by the receiving antenna 300 in the antenna assembly 10 from the space include the first electromagnetic wave signal of the second frequency band and the respective harmonic signals (e.g., the second harmonic signal, the third harmonic signal, etc.) of the first electromagnetic wave signal of the second frequency band. If the second mixed signal is completely demodulated, a second baseband signal corresponding to the first electromagnetic wave signal of the second frequency band and a plurality of second harmonic signals are obtained. At this time, the determining unit 420 is further configured to determine whether the power of each second harmonic signal is greater than a second preset power. When there is a first harmonic signal with power greater than the second preset power, the radiation stray caused by a second harmonic signal with power greater than the second preset power is considered to be large, and the second harmonic signal with power greater than the second preset power needs to be suppressed. It is understood that the second preset power can be set according to actual conditions. At this time, the phase inverting unit 430 is further configured to invert the second harmonic signal with power greater than the second preset power to obtain the second inverted harmonic signal. The second inverted harmonic signal is loaded in the transmitting antenna 200 to eliminate at least part of the radiation stray caused by the transmitting antenna 200 radiating the first electromagnetic wave signal of the second frequency band.
It is understood that, in other embodiments, when the detection unit detects that the first excitation signal is switched to the second excitation signal, the demodulation unit 410 is configured to demodulate a second mixed signal obtained by the receiving antenna 300 from the electromagnetic wave signal received in space to obtain a plurality of second harmonic signals. When the transmitting antenna 200 in the antenna assembly 10 radiates the first electromagnetic wave signal of the second frequency band according to the second excitation signal, the receiving antenna 300 in the antenna assembly 10 receives the electromagnetic wave signal from the space, so as to obtain a second mixed signal. At this time, the electromagnetic wave signals received by the receiving antenna 300 in the antenna assembly 10 from the space include the first electromagnetic wave signal of the second frequency band and the respective harmonic signals (e.g., the second harmonic signal, the third harmonic signal, etc.) of the first electromagnetic wave signal of the second frequency band. If the second mixed signal is completely demodulated, a second baseband signal corresponding to the first electromagnetic wave signal of the second frequency band and a plurality of second harmonic signals are obtained.
At this time, the phase inverting unit 430 is configured to invert the second harmonic signal with power greater than the third preset power to obtain a second inverted harmonic signal, where the second inverted harmonic signal is loaded in the transmitting antenna 200, and at this time, the retrieving unit 460 is further configured to retrieve a prestored third inverted harmonic signal, where the second inverted harmonic signal and the third inverted harmonic signal are used to eliminate at least part of radiation stray caused when the transmitting antenna 200 radiates the first electromagnetic wave signal of the second frequency band.
For example, a second harmonic signal with a power greater than a third preset power is inverted to obtain a second inverted harmonic signal, and when the second inverted harmonic signal is loaded in the transmitting antenna 200, the second harmonic signal with a larger power (greater than the first threshold value) can be eliminated to eliminate main radiation stray caused when the transmitting antenna 200 radiates the electromagnetic wave signal of the second frequency band; then, the retrieving unit 460 retrieves a pre-stored third inverse harmonic signal, which can cancel the second harmonic signal whose power is secondarily large (greater than the second threshold value and less than or equal to the first threshold value). The technical effect of better suppressing the radiation stray is achieved by eliminating the radiation stray caused by the radiation of the electromagnetic wave signal of the second frequency band by the transmitting antenna 200 in a layering manner.
It is understood that the combining unit 440 in other embodiments combines the first excitation signal for driving the transmitting antenna 200 with the first inverse harmonic signal; the combined first excitation signal and the first inverse harmonic signal are applied to the transmitting antenna 200.
Please refer to fig. 2, and fig. 2 is a schematic structural diagram of an antenna assembly according to an embodiment of the present application. The antenna assembly 10 includes: the harmonic suppression device 400 comprises a demodulation unit 410, a judgment unit 420 and an inversion unit 430, wherein the demodulation unit 410 is configured to demodulate the first mixed signal to obtain a plurality of first harmonic signals, the judgment unit 420 respectively judges whether the power of each first harmonic signal is greater than a first preset power, the inversion unit 430 is configured to invert the first harmonic signal with the power greater than the first preset power, to obtain a first anti-phase harmonic signal, which is loaded in the transmitting antenna 200 to cancel at least part of the radiated spurs caused by the transmitting antenna 200 radiating the first electromagnetic wave signal of the first frequency band.
The demodulation unit 410 is further configured to demodulate the first mixed signal to obtain a first baseband signal corresponding to the first electromagnetic wave signal in the first frequency band. The harmonic suppression apparatus 400 further includes a combining unit 440, where the combining unit 440 is configured to combine the first baseband signal and the first inverse harmonic signal, the combined first baseband signal and the first inverse harmonic signal are loaded onto the transmitting antenna 200, and the transmitting antenna 200 generates a second electromagnetic wave signal according to the combined first baseband signal and the first inverse harmonic signal.
The excitation source 100 is further configured to generate a second excitation signal, and the transmitting antenna 200 is further configured to generate a first electromagnetic wave signal in a second frequency band according to the second excitation signal.
The harmonic suppression apparatus 400 further includes a monitoring unit 450 and a retrieving unit 460. The monitoring unit 450 is configured to monitor whether the excitation signal emitted by the excitation source 100 is switched from a first excitation signal to a second excitation signal. Specifically, the monitoring unit 450 is configured to detect the frequency of the excitation signal emitted by the excitation source 100 at preset time intervals to determine whether the excitation signal emitted by the excitation source 100 is switched from a first excitation signal to a second excitation signal. It is to be understood that, in another embodiment, the monitoring unit 450 is further configured to determine whether the excitation signal emitted by the excitation source 100 is switched from the first excitation signal to the second excitation signal according to the frequency of the first harmonic signal. For example, when the excitation source 100 emits the first excitation signal and the receiving antenna 300 generates the electromagnetic wave signal of GSM900MHZ according to the first excitation signal, the frequency of the second harmonic generated by the non-linear device around the electronic device 1 according to the electromagnetic wave signal of GSM900MHZ is 1800MHZ, the frequency of the third harmonic generated by the non-linear device according to the electromagnetic wave signal of GSM900MHZ is 2700MHZ, and the frequency of the N-th harmonic generated by the non-linear device according to the electromagnetic wave signal of GSM900MHZ is (900 × N) MHZ, where N is a positive integer. When the excitation source 100 emits the second excitation signal and the receiving antenna 300 generates the electromagnetic wave signal of GSM800 according to the second excitation signal, the frequency of the second harmonic generated by the nonlinear device around the electronic device 1 according to the electromagnetic wave signal of GSM800MHZ is 1600MHZ, the frequency of the third harmonic generated by the nonlinear device according to the electromagnetic wave signal of GSM800MHZ is 2400 MHZ. Therefore, the detection unit can determine whether the excitation signal emitted by the excitation source 100 is switched from the first excitation signal to the second excitation signal according to the frequency of the first harmonic signal.
The retrieving unit 460 is configured to, when the harmonic suppression apparatus 400 monitors that the excitation signal sent by the excitation source 100 is switched from the first excitation signal to the second excitation signal, retrieve a second pre-stored inverse harmonic signal, and load the second inverse harmonic signal on the transmitting antenna 200, where the second inverse harmonic signal is used to eliminate at least part of radiation stray caused by the transmitting antenna 200 radiating the first electromagnetic wave signal in the second frequency band.
It is to be understood that, in other embodiments, when the monitoring unit 450 monitors that the first excitation signal is switched to the second excitation signal, the demodulating unit 410 is further configured to demodulate a second mixed signal obtained by the receiving antenna 300 from the electromagnetic wave signal received in the space to obtain a plurality of second harmonic signals. When the transmitting antenna 200 in the antenna assembly 10 radiates the first electromagnetic wave signal of the second frequency band according to the second excitation signal, the receiving antenna 300 in the antenna assembly 10 receives the electromagnetic wave signal from the space, so as to obtain a second mixed signal. At this time, the electromagnetic wave signals received by the receiving antenna 300 in the antenna assembly 10 from the space include the first electromagnetic wave signal of the second frequency band and the respective harmonic signals (e.g., the second harmonic signal, the third harmonic signal, etc.) of the first electromagnetic wave signal of the second frequency band. If the second mixed signal is completely demodulated, a second baseband signal corresponding to the first electromagnetic wave signal of the second frequency band and a plurality of second harmonic signals are obtained. At this time, the determining unit 420 is further configured to determine whether the power of each second harmonic signal is greater than a second preset power. When there is a first harmonic signal with power greater than the second preset power, the radiation stray caused by a second harmonic signal with power greater than the second preset power is considered to be large, and the second harmonic signal with power greater than the second preset power needs to be suppressed. It is understood that the second preset power can be set according to actual conditions. At this time, the phase inverting unit 430 is further configured to invert the second harmonic signal with power greater than the second preset power to obtain the second inverted harmonic signal. The second inverted harmonic signal is loaded in the transmitting antenna 200 to eliminate at least part of the radiation stray caused by the transmitting antenna 200 radiating the first electromagnetic wave signal of the second frequency band.
It is understood that, in other embodiments, when the detection unit detects that the first excitation signal is switched to the second excitation signal, the demodulation unit 410 is configured to demodulate a second mixed signal obtained by the receiving antenna 300 from the electromagnetic wave signal received in space to obtain a plurality of second harmonic signals. When the transmitting antenna 200 in the antenna assembly 10 radiates the first electromagnetic wave signal of the second frequency band according to the second excitation signal, the receiving antenna 300 in the antenna assembly 10 receives the electromagnetic wave signal from the space, so as to obtain a second mixed signal. At this time, the electromagnetic wave signals received by the receiving antenna 300 in the antenna assembly 10 from the space include the first electromagnetic wave signal of the second frequency band and the respective harmonic signals (e.g., the second harmonic signal, the third harmonic signal, etc.) of the first electromagnetic wave signal of the second frequency band. If the second mixed signal is completely demodulated, a second baseband signal corresponding to the first electromagnetic wave signal of the second frequency band and a plurality of second harmonic signals are obtained.
At this time, the phase inverting unit 430 is configured to invert the second harmonic signal with power greater than the third preset power to obtain a second inverted harmonic signal, where the second inverted harmonic signal is loaded in the transmitting antenna 200, and at this time, the retrieving unit 460 is further configured to retrieve a prestored third inverted harmonic signal, where the second inverted harmonic signal and the third inverted harmonic signal are used to eliminate at least part of radiation stray caused when the transmitting antenna 200 radiates the first electromagnetic wave signal of the second frequency band.
For example, a second harmonic signal with a power greater than a third preset power is inverted to obtain a second inverted harmonic signal, and when the second inverted harmonic signal is loaded in the transmitting antenna 200, the second harmonic signal with a larger power (greater than the first threshold value) can be eliminated to eliminate main radiation stray caused when the transmitting antenna 200 radiates the electromagnetic wave signal of the second frequency band; then, the retrieving unit 460 retrieves a pre-stored third inverse harmonic signal, which can cancel the second harmonic signal whose power is secondarily large (greater than the second threshold value and less than or equal to the first threshold value). The technical effect of better suppressing the radiation stray is achieved by eliminating the radiation stray caused by the radiation of the electromagnetic wave signal of the second frequency band by the transmitting antenna 200 in a layering manner.
In this embodiment, the transmitting antenna 200 is a main antenna, and the receiving antenna 300 is a diversity antenna. The transmitting antenna 200 and the receiving antenna 300 may be disposed at intervals on two sides of the electronic device 1 to which the antenna assembly 10 is applied, so as to increase the isolation between the transmitting antenna 200 and the receiving antenna 300 and provide the communication quality of the electronic device 1.
It is understood that the antenna assembly 10 of the present application further includes an impedance matching circuit 500, one end of the impedance matching circuit 500 is electrically connected to the excitation source 100, the other end is electrically connected to the transmitting antenna 200, the impedance matching circuit 500 is configured to adjust an output impedance of the excitation source 100, and the impedance matching circuit 500 is further configured to adjust an input impedance of the transmitting antenna 200, so as to adjust a matching degree of the output impedance and the input impedance. The antenna assembly 10 of the present invention adjusts the matching degree between the output impedance and the input impedance, so that the output impedance of the excitation source 100 is matched with the input impedance of the transmitting antenna 200, thereby reducing the energy loss of the excitation signal emitted by the excitation source 100 transmitted to the transmitting antenna 200, and improving the signal transmission quality of the excitation signal emitted by the excitation source 100, so as to improve the communication quality of the electronic device 1 to which the antenna assembly 10 is applied.
It is understood that, in other embodiments, the combining unit 440 of the harmonic suppression device 400 in the antenna assembly 10 is configured to combine the first excitation signal and the first inverse harmonic signal, the combined first excitation signal and the first inverse harmonic signal are applied to the transmitting antenna 200, and the transmitting antenna 200 generates the second electromagnetic wave signal according to the combined first baseband signal and the first inverse harmonic signal.
Fig. 3 shows a schematic structural diagram of an electronic device 1 according to an embodiment of the present application, where fig. 3 is a schematic structural diagram of the electronic device. The electronic device 1 comprises the antenna assembly 10 according to any of the preceding embodiments. The electronic apparatus 1 includes, but is not limited to, a smart phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), a Personal Digital Assistant (PDA), or other Portable devices.
It should be understood that in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.
In embodiments of the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the application. In order to simplify the disclosure of the embodiments of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, embodiments of the present application may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present application provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the embodiments of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processor, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present application, and that such changes and modifications are also to be considered as within the scope of the present application.
Claims (10)
1. A harmonic suppression apparatus, characterized in that the harmonic suppression apparatus comprises:
the demodulation unit is used for demodulating a first mixed signal obtained by the receiving antenna from the electromagnetic wave signal received in the space to obtain a plurality of first harmonic signals;
the judging unit is used for respectively judging whether the power of each first harmonic signal is greater than a first preset power;
the phase inversion unit is used for inverting a first harmonic signal with power greater than first preset power to obtain a first inverted harmonic signal, and the first inverted harmonic signal is used for eliminating at least part of radiation stray caused by radiation of a first electromagnetic wave signal of a first frequency band by a transmitting antenna when being loaded in the transmitting antenna, wherein when the transmitting antenna radiates the first electromagnetic wave signal of the first frequency band, the receiving antenna receives the first mixed signal;
the monitoring unit is used for monitoring whether the excitation signal received by the receiving antenna is switched from a first excitation signal to a second excitation signal or not, wherein the receiving antenna generates a first electromagnetic wave signal of a first frequency band according to the first excitation signal, and the receiving antenna generates a first electromagnetic wave signal of a second frequency band according to the second excitation signal;
and the modulation unit is used for modulating a prestored second inverse harmonic signal when the monitoring unit monitors that the first excitation signal is switched to the second excitation signal, wherein the second inverse harmonic signal is used for eliminating at least part of radiation stray caused by the radiation of the first electromagnetic wave signal of the second frequency band by the transmitting antenna.
2. The harmonic suppression apparatus of claim 1, wherein the demodulation unit is further configured to demodulate the first mixed signal to obtain a first baseband signal;
the harmonic suppression apparatus further includes:
a combining unit, configured to combine the first baseband signal with the first inverse harmonic signal; the combined first baseband signal and the first inverse harmonic signal are loaded onto a transmit antenna.
3. The harmonic suppression apparatus as claimed in claim 1, further comprising:
the combining unit is used for driving a first excitation signal of a transmitting antenna to be combined with the first inverse harmonic signal; the combined first excitation signal and the first inverse harmonic signal are loaded onto the transmit antenna.
4. The harmonic suppression apparatus of claim 1, wherein the monitoring unit is configured to detect the frequency of the excitation signal from the excitation source at predetermined intervals to determine whether the excitation signal from the excitation source is switched from the first excitation signal to the second excitation signal.
5. An antenna assembly, characterized in that the antenna assembly comprises: the harmonic suppression device comprises a demodulation unit, a judgment unit and an inversion unit, wherein the demodulation unit is used for demodulating the first mixed signal to obtain a plurality of first harmonic signals, the judgment unit is used for respectively judging whether the power of each first harmonic signal is greater than a first preset power, the inversion unit is used for inverting the first harmonic signal with the power greater than the first preset power to obtain a first inverted harmonic signal, the first inverse harmonic signal is used for eliminating at least part of radiation stray caused by the radiation of the first electromagnetic wave signal of a first frequency band by the transmitting antenna when being loaded in the transmitting antenna, wherein when the first electromagnetic wave signal of the first frequency band is radiated by the transmitting antenna, the receiving antenna receives the first mixed signal, the excitation source is also used for generating a second excitation signal, the transmitting antenna is also used for generating the first electromagnetic wave signal of a second frequency band according to the second excitation signal, the harmonic suppression device further comprises a monitoring unit and an invoking unit, the monitoring unit is used for monitoring whether the excitation signal sent by the excitation source is switched from the first excitation signal to the second excitation signal, and when the harmonic suppression device monitors that the excitation signal sent by the excitation source is switched from the first excitation signal to the second excitation signal, the modulation unit modulates a pre-stored second inverse harmonic signal and loads the second inverse harmonic signal on the transmitting antenna, wherein the second inverse harmonic signal is used for eliminating at least part of radiation stray caused by the first electromagnetic wave signal of a second frequency band radiated by the transmitting antenna.
6. The antenna assembly of claim 5, wherein the demodulation element is further configured to demodulate the first mixed signal to obtain a first baseband signal, and the harmonic rejection apparatus further comprises a combining element configured to combine the first baseband signal with the first inverse harmonic signal, wherein the combined first baseband signal and first inverse harmonic signal are applied to a transmitting antenna, and wherein the transmitting antenna generates a second electromagnetic wave signal according to the combined first baseband signal and first inverse harmonic signal.
7. The antenna assembly of claim 5, wherein the harmonic rejection device further comprises a combining element for combining the first excitation signal with the first anti-phase harmonic signal, the combined first excitation signal and first anti-phase harmonic signal being applied to the transmitting antenna, the transmitting antenna generating a second electromagnetic wave signal based on the combined first baseband signal and first anti-phase harmonic signal.
8. The antenna assembly of claim 5, wherein the monitoring unit is configured to detect the frequency of the excitation signal from the excitation source at predetermined intervals to determine whether the excitation signal from the excitation source is switched from a first excitation signal to a second excitation signal.
9. The antenna assembly of claim 5, wherein the transmit antenna is a primary antenna and the receive antenna is a diversity antenna.
10. An electronic device, characterized in that the electronic device comprises an antenna assembly according to any one of claims 5-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810114976.XA CN108390149B (en) | 2018-02-05 | 2018-02-05 | Harmonic suppression device, antenna assembly and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810114976.XA CN108390149B (en) | 2018-02-05 | 2018-02-05 | Harmonic suppression device, antenna assembly and electronic device |
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| CN108390149A CN108390149A (en) | 2018-08-10 |
| CN108390149B true CN108390149B (en) | 2020-02-11 |
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| JP2013090188A (en) * | 2011-10-19 | 2013-05-13 | Renesas Electronics Corp | Crystal oscillator circuit |
| CN105120389B (en) * | 2015-08-17 | 2019-07-12 | 惠州Tcl移动通信有限公司 | A kind of method and earphone carrying out noise reduction process according to scene |
| CN105812003B (en) * | 2016-03-21 | 2019-02-05 | Oppo广东移动通信有限公司 | Clutter interference suppressing method, clutter interference inhibit device and electronic device |
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