CN105099470A - Electronic device and control method thereof - Google Patents
Electronic device and control method thereof Download PDFInfo
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- CN105099470A CN105099470A CN201510330436.1A CN201510330436A CN105099470A CN 105099470 A CN105099470 A CN 105099470A CN 201510330436 A CN201510330436 A CN 201510330436A CN 105099470 A CN105099470 A CN 105099470A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/084—Equal gain combining, only phase adjustments
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention provides an electronic device and a control method thereof, which can, by a simple structure, effectively enhance quality of radio-frequency signals received through an antenna. The electronic device comprises the antenna, a first filter, a second filter, an amplifier, a radio-frequency signal demodulator and a controller. The antenna is used for receiving the radio-frequency signals; the first filter is used for filtering the radio-frequency signals received through the antenna; the second filter is used for filtering the radio-frequency signals filtered by the first filter; the amplifier is used for amplifying the radio-frequency signals filtered by the second filter; the radio-frequency demodulator is used for demodulating the radio-frequency signals amplified by the amplifier; and the controller is connected with the first filter and the second filter, and is configured for controlling working frequency ranges and working modes of the first filter and the second filter based on a frequency band of the radio-frequency signals received by the antenna.
Description
Technical field
The present invention relates to electronic equipment and control method thereof.
Background technology
In the electronic equipment of such as mobile phone etc., the radiofrequency signal received by antenna is sent to radiofrequency signal demodulator in electronic equipment internal, thus carries out demodulation process in radiofrequency signal demodulator.
Along with the slimming of electronic equipment and the variation of function, the limited space of electronic equipment internal, thus cause the transmission line between antenna and radiofrequency signal demodulator elongated, thus the loss resulting through the radiofrequency signal that antenna receives becomes large, and be easily subject to the impact of noise, be input to the degradation of the radiofrequency signal of radiofrequency signal demodulator.
Especially, in the electronic equipment being provided with main collection antenna and diversity antenna, in order to avoid disturbing mutually between main collection antenna and classification antenna, main collection antenna and diversity antenna are arranged at respectively the two ends of electronic equipment.Therefore, between the radiofrequency signal demodulator arranged near main collection antenna and diversity antenna, transmission line becomes long, received by diversity antenna and the radiofrequency signal being input to radiofrequency signal demodulator because of the impact of loss and noise, its degradation, causes being difficult to effectively play diversity reception characteristic.
Summary of the invention
The present invention completes in view of the above problems, its object is to provide a kind of electronic equipment and control method thereof, effectively can be strengthened the quality of the radiofrequency signal received by antenna by simple structure, antenna can be tackled and become interference that is large and noise to the long loss caused of the transmission line of radiofrequency signal demodulator.
According to an aspect of the present invention, a kind of electronic equipment is provided.Described electronic equipment comprises: antenna, and configuration carrys out received RF signal; First filter, is connected with described antenna, and configuration carries out filtering to the radiofrequency signal received by described antenna; Second filter, is connected with described first filter, and configuration carries out filtering to by the radiofrequency signal after described first filter filtering; Amplifier, is connected with described second filter, and configuration is amplified by the radiofrequency signal after described second filter filtering; Radiofrequency signal demodulator, is connected with described amplifier, configures and carries out demodulation to by the radiofrequency signal after described amplifier amplification; And controller, be connected with described first filter and described second filter, configure the frequency range based on the radiofrequency signal received by described antenna, control working band and the working method of described first filter and described second filter.
According to a further aspect in the invention, a kind of control method being applied to electronic equipment is provided.Described control method comprises: by antenna received RF signal; Based on the frequency range of the radiofrequency signal received by described antenna, control working band and the working method of the first filter and the second filter, by described first filter, filtering is carried out to the radiofrequency signal received by described antenna, and carry out filtering by described second filter to by the radiofrequency signal after described first filter filtering; Amplify by the radiofrequency signal after described second filter filtering; Demodulation is carried out to the radiofrequency signal after being amplified by described amplifier.
According to electronic equipment of the present invention and control method thereof, by carrying out based on the frequency range of radiofrequency signal the first filter of controlling and the second filter carries out filtering to the radiofrequency signal received by antenna, and then be sent to radiofrequency signal demodulator after filtered radiofrequency signal is amplified.Therefore, it is possible to effectively strengthened the quality of the radiofrequency signal received by antenna by simple structure, antenna can be tackled and become interference that is large and noise to the long loss caused of the transmission line of radiofrequency signal demodulator.Further, electronic equipment of the present invention and control method thereof also can be adapted to the radiofrequency signal of carrier aggregation.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the electronic equipment representing embodiments of the present invention.
Fig. 2 is the illustration figure representing the first filter of embodiments of the present invention and the structure of the second filter.
Fig. 3 is the flow chart of the control method representing embodiments of the present invention.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.There is provided the description referring to accompanying drawing, to help the understanding to the example embodiment of the present invention limited by claim and equivalent thereof.It comprises the various details helping to understand, but they can only be counted as exemplary.Therefore, those skilled in the art will recognize that, can make various changes and modifications execution mode described herein, and do not depart from the scope of the present invention and spirit.And, in order to make specification clearly succinct, will the detailed description to well known function and structure be omitted.
See figures.1.and.2 the electronic equipment that embodiments of the present invention are described.Fig. 1 is the functional block diagram of the electronic equipment representing embodiments of the present invention.
As shown in Figure 1, the electronic equipment 1 of embodiments of the present invention comprises: antenna 11, first filter 12, second filter 13, amplifier 14, radiofrequency signal demodulator 15 and controller 16.Wherein, electronic equipment 1 is such as mobile phone, but is not limited to this, as long as pass through the electronic equipment of antenna received RF signal.
Antenna 11 configures received RF signal.Wherein, in embodiments of the present invention, the concrete structure of antenna 11 not circumscribed.
In addition, as described later, in the electronic device 1, signal is carried out to the radiofrequency signal received by antenna 11 and strengthens process (filtering, amplification etc.), reduce the wastage thus and the impact of noise.Be preferably, in the electronic device 1, signal carried out to the radiofrequency signal received by diversity antenna and strengthens process, but also can carry out signal to the radiofrequency signal received by diversity antenna strengthens process.In addition, in the electronic equipment 1 that main collection antenna and diversity antenna are not set, also in order to reduce the wastage and the impact of noise, signal can be carried out to the radiofrequency signal received by specific antenna and strengthens process.Therefore, in embodiments of the present invention, the radiofrequency signal needing to carry out signal enhancing process is received by antenna 11.
First filter 12 and the configuration of the second filter 13 carry out filtering process to the radiofrequency signal received by antenna 11.Thus, before radio frequency signal amplifies, carry out filtering process, thus can avoid carrying out amplification process to the interference signal outside effective band and noise etc.
Particularly, the first filter 12 is connected with antenna 11, and configuration carries out filtering to the radiofrequency signal received by antenna 11.Second filter 13 is connected with the first filter 12, and configuration carries out filtering to by the filtered radiofrequency signal of the first filter 12.
Wherein, in embodiments of the present invention, the first filter 12 and the second filter 13 are tunable optic filter, can under the control of following controller 16, adjustment working band and working method (low pass, high pass, band lead to, be with resistance etc.).Such as, comprising variable capacitor at the first filter 12 and the second filter 13, by changing the capacitance of this variable capacitor, thus working band and working method can be adjusted.In addition, in the first filter 12 and the second filter 13, also working band and working method can be adjusted by other tunable parts.
By the first filter 12 and the second filter 13 as tunable optic filter, the radiofrequency signal received is carried out to the filtering of twice, therefore, it is possible to carry out filtering to the radiofrequency signal of two frequency ranges simultaneously by antenna 11.Such as, in the wireless communication system of prior art, in order to effectively utilize radio band and improve transmission speed, sent and receive the radiofrequency signal of two frequency ranges by carrier aggregation.In embodiments of the present invention, by the first filter 12 and the second filter 13 as tunable optic filter, effectively filtering can be carried out to the radiofrequency signal being sent and receive two frequency ranges by carrier aggregation.Certainly, by the first filter 12 and the second filter 13 as tunable optic filter, also filtering can be carried out to the signal of single frequency band.Concrete tuning process, is specifically described below.
Fig. 2 is the illustration figure representing the first filter 12 of embodiments of the present invention and the structure of the second filter 13.Comprise two Piezocapacitors at illustrative first filter 12 of Fig. 2, comprise a Piezocapacitor at the second filter 13.Under the control of controller 16 described later, the bias voltage of above-mentioned Piezocapacitor is set, changes the capacitance of Piezocapacitor thus, thus working band and working method can be adjusted.In addition, the first filter 12 illustrated in Fig. 2 and the structure of the second filter 13 are only examples, can adopt the filter of other structure as required, and also can adopt the miscellaneous part beyond Piezocapacitor as tunable parts.
Controller 16 is connected with the first filter 12 and the second filter 13, configures the frequency range based on the radiofrequency signal received by antenna 11, controls working band and the working method of the first filter 12 and the second filter 13.
Particularly, controller 16 can determine the frequency range of the radiofrequency signal received by antenna 11 according to the signaling such as received in advance from base station, in addition also can pass through the power of the radiofrequency signal detected by detection part (not shown), determine which frequency range is the radiofrequency signal received by antenna 11 comprise.
In addition, when constituting first filter 12 and second filter 13 as shown in Figure 2, working band and the working method of filter is changed by the Piezocapacitor comprised in filter.Now, controller 16 arranges based on the frequency range of the radiofrequency signal received by antenna 11 bias voltage supplied Piezocapacitor, change the capacitance of described Piezocapacitor, thus control working band and the working method of the first filter 12 and the second filter 13.Also can be, when adjusting working band and working method by other tunable parts in the first filter 12 and the second filter 13, controller 16, based on the frequency range of the radiofrequency signal received by antenna 11, suitably controls these other tunable parts.
Particularly, when receiving the radiofrequency signal of carrier aggregation first frequency range and the second frequency range by antenna 11, controller 16 is controlled the first filter 12 and carries out bandpass filtering with the band passband comprising the first frequency range and the second frequency range to the radiofrequency signal received by antenna 11, further, controller 16 controls the second filter 13 and carries out bandreject filtering with the band suppressed frequency band between the first frequency range and the second frequency range to by the radiofrequency signal after the first filter filtering.
Thus, after having carried out twice filtering by the first filter 12 and the second filter 13, the signal of the first frequency range and the second frequency range in the radiofrequency signal after filtering, has only been comprised.Thus, before radio frequency signal amplifies, carry out filtering process, thus can avoid carrying out amplification process to the interference signal outside effective band and noise etc.
Such as, when the radiofrequency signal of the signal needing to carry out filtering the first frequency range (791 ~ 821MHz) that has been carrier aggregation and the second frequency range (925 ~ 960MHz), controller 16 is controlled the first filter 12 and carries out bandpass filtering with the band passband (791MHz ~ 960MHz) comprising the first frequency range and the second frequency range to the radiofrequency signal received by antenna 11, and, controller 16 controls the second filter 13 and carries out bandreject filtering with the band suppressed frequency band (821 ~ 925MHz) between the first frequency range and the second frequency range to by the radiofrequency signal after the first filter filtering.Wherein, the first above-mentioned frequency range and the example of the second frequency range are not limited to above-mentioned frequency, suitably change according to the bandwidth assignment situation of cordless communication network.
Particularly, when controller 16 controls the working band of the first filter 12 and the second filter 13 and working method, Piezocapacitor such as shown in Figure 2 by comprising in filter changes working band and the working method of filter, be suitably arranged on the bias voltage of the Piezocapacitor comprised in filter.Such as, be determined at working band and the working method of the first filter 12 under each bias voltage in advance, be determined at working band and the working method of the second filter 13 under each bias voltage equally in advance, and store working band and the working method of the first filter 12 and the second filter 13 accordingly with each bias voltage.If so, when controller 16 controls the working band of the first filter 12 and working method, the bias voltage of the Piezocapacitor comprised in the first filter 12 is set as the bias voltage corresponding with the working band of first filter that will set and working method.Equally, when controller 16 controls the working band of the second filter 13 and working method, the bias voltage of the Piezocapacitor comprised in the second filter 13 is set as the bias voltage corresponding with the working band of first filter that will set and working method.
In addition, when being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by antenna 11, controller 16 controls the first filter 12 and the second filter carries out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by antenna collaboratively.
Thus, after having carried out cooperation filtering by the first filter 12 and the second filter 13, the signal of the 3rd frequency range in the radiofrequency signal after filtering, has only been comprised.Thus, before radio frequency signal amplifies, carry out filtering process, thus can avoid carrying out amplification process to the interference signal outside effective band and noise etc.
Such as, when when needing the signal carrying out filtering being the radiofrequency signal of single frequency range (925 ~ 960MHz) of not carrying out carrier aggregation, controller 16 controls the first filter 12 and the second filter 13 carries out bandpass filtering with the band passband comprising the 3rd frequency range (925 ~ 960MHz) to the radiofrequency signal received by antenna collaboratively.Wherein, the example of the 3rd above-mentioned frequency range is not limited to above-mentioned frequency, suitably changes according to the bandwidth assignment situation of cordless communication network.
Particularly, when controller 16 controls the working band of the first filter 12 and the second filter 13 and working method, Piezocapacitor such as shown in Figure 2 by comprising in filter changes working band and the working method of filter, be suitably arranged on the bias voltage of the Piezocapacitor comprised in filter.Such as, be determined at working band when the first filter 12 under each bias voltage and the second filter 13 cooperate and working method in advance, and store the first filter 12 accordingly with each bias voltage and the second filter 13 cooperates time working band and working method.
If so, when controller 16 first filter 12 and the second filter 13 carry out bandpass filtering with the band passband comprising the 3rd frequency range (925 ~ 960MHz) to the radiofrequency signal received by antenna collaboratively, the bias voltage of the Piezocapacitor comprised in the first filter 12 and the second filter 13 is set as working band when cooperating with first filter 12 that will set and the second filter 13 and the corresponding bias voltage of working method.
In addition, when processing the radiofrequency signal of single frequency band, in embodiments of the present invention, also can control as follows.Namely, when being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by antenna 11, controller 16 is controlled the first filter 12 and carries out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by antenna 11, and controller 16 controls the second filter 13 carries out bandpass filtering with the band passband comprising the 3rd frequency range to by the filtered radiofrequency signal of the first filter 12.
Such as, when when needing the signal carrying out filtering being the radiofrequency signal of single frequency range (925 ~ 960MHz) of not carrying out carrier aggregation, controller 16 is controlled the first filter 12 and carries out bandpass filtering with the band passband comprising the 3rd frequency range (925 ~ 960MHz) to the radiofrequency signal received by antenna 11, and controls the second filter 13 and carry out bandpass filtering with the band passband comprising the 3rd frequency range (925 ~ 960MHz) to the radiofrequency signal received by antenna 11.Wherein, the example of the 3rd above-mentioned frequency range is not limited to above-mentioned frequency, suitably changes according to the bandwidth assignment situation of cordless communication network.
Particularly, when controller 16 controls the working band of the first filter 12 and the second filter 13 and working method, Piezocapacitor such as shown in Figure 2 by comprising in filter changes working band and the working method of filter, be suitably arranged on the bias voltage of the Piezocapacitor comprised in filter.As mentioned above, be determined at working band and the working method of the first filter 12 under each bias voltage in advance, be determined at working band and the working method of the second filter 13 under each bias voltage equally in advance, and store working band and the working method of the first filter 12 and the second filter 13 accordingly with each bias voltage.If so, when controller 16 controls the working band of the first filter 12 and working method, the bias voltage of the Piezocapacitor comprised in the first filter 12 is set as the bias voltage corresponding with the working band of first filter that will set and working method.Equally, when controller 16 controls the working band of the second filter 13 and working method, the bias voltage of the Piezocapacitor comprised in the second filter 13 is set as the bias voltage corresponding with the working band of first filter that will set and working method.
In addition, due to the restriction of the scope of the working band of filter, along with the increase of the scope of working band, cost of manufacture increases, and structure becomes complicated.Therefore, in embodiments of the present invention, also high frequency band path and low-frequency band path can be such as divided into the radiofrequency signal received by antenna 11.
Now, the first filter and the second filter are arranged respectively to each path.Such as, when high frequency band path and low-frequency band path being divided into the radiofrequency signal received by antenna 11, arrange for the first filter of the radiofrequency signal of high frequency band path and the second filter to carry out filtering to the radiofrequency signal of high frequency band path, and arrange for the first filter of the radiofrequency signal of low-frequency band path and the second filter to carry out filtering to the radiofrequency signal of low-frequency band path.
Turn back to Fig. 1, amplifier 14 is connected with the second filter 13, and configuration is amplified by the radiofrequency signal after the second filter filtering.In addition, in embodiments of the present invention, being preferably amplifier 14 is low noise amplifiers, thus reduces noise jamming.
Wherein, as mentioned above, when high frequency band path and low-frequency band path are such as divided into the radiofrequency signal received by antenna 11, amplifier 14 can be set respectively for each path, thus be used for amplifying by for the signal after the first filter of high frequency band path and the second filter filtering for the amplifier of high frequency band path, be used for amplifying by for the signal after the first filter of low-frequency band path and the second filter filtering for the amplifier of low-frequency band path.In addition, in embodiments of the present invention, also an amplifier 14 can be only set to high frequency band path and low-frequency band path, this amplifier 14 accepted the signal after for the first filter of low-frequency band path and the second filter filtering and by for the signal after the first filter of high frequency band path and the second filter filtering, and amplified two signals simultaneously.
Radiofrequency signal demodulator 15 is connected with amplifier 14, configures and carries out demodulation to the radiofrequency signal after being amplified by amplifier 14.
In addition, in embodiments of the present invention, can as required, and then to the process being undertaken decoding etc. by the signal after radiofrequency signal demodulator 15 demodulation.
Electronic equipment 1 according to the embodiment of the present invention, by carrying out based on the frequency range of radiofrequency signal the first filter of controlling and the second filter carries out filtering to the radiofrequency signal received by antenna, and then be sent to radiofrequency signal demodulator after filtered radiofrequency signal is amplified.Therefore, be through filtering by the signal of radiofrequency signal demodulator 15 demodulation and the radiofrequency signal of amplifying, signal strength signal intensity obviously strengthens.Thus, effectively can be strengthened the quality of the radiofrequency signal received by antenna by simple structure, antenna can be tackled and become interference that is large and noise to the long loss caused of the transmission line of radiofrequency signal demodulator.
Below, the flow chart of control method of the present invention is described with reference to Fig. 3.Control method shown in Fig. 3 can be applied to the electronic equipment 1 described in Fig. 1.As shown in Figure 1, electronic equipment 1 comprises: antenna 11, first filter 12, second filter 13, amplifier 14, radiofrequency signal demodulator 15 and controller 16.
In step sl, by antenna received RF signal.
Particularly, in follow-up process, signal is carried out to the radiofrequency signal received by antenna and strengthens process (filtering, amplification etc.), reduce the wastage thus and the impact of noise.Be preferably, in the electronic equipment 1 of Fig. 1, signal carried out to the radiofrequency signal received by diversity antenna and strengthens process, but also can carry out signal to the radiofrequency signal received by diversity antenna strengthens process.In addition, in the electronic equipment 1 that main collection antenna and diversity antenna are not set, also in order to reduce the wastage and the impact of noise, signal can be carried out to the radiofrequency signal received by specific antenna and strengthens process.Therefore, in embodiments of the present invention, in step sl, the signal received by antenna needs to carry out the radiofrequency signal that signal strengthens process.
In step s 2, based on the frequency range of the radiofrequency signal received by antenna, control working band and the working method of the first filter and the second filter, by the first filter, filtering is carried out to the radiofrequency signal received by described antenna, and carry out filtering by the second filter to by the radiofrequency signal after described first filter filtering.
Wherein, the frequency range of the radiofrequency signal received by antenna 11 can be determined according to the signaling such as received in advance from base station, in addition also can pass through the power of the radiofrequency signal detected by detection part (not shown), determine which frequency range is the radiofrequency signal received by antenna 11 comprise.
Particularly, when being applied to electronic equipment 1 of Fig. 1, the first filter 12 is connected with antenna 11, and configuration carries out filtering to the radiofrequency signal received by antenna 11.Second filter 13 is connected with the first filter 12, and configuration carries out filtering to by the filtered radiofrequency signal of the first filter 12.
Wherein, the first filter 12 and the second filter 13 are tunable optic filter, can adjust working band and working method (low pass, high pass, band lead to, be with resistance etc.).Such as shown in Fig. 2, comprising variable capacitor at the first filter 12 and the second filter 13, by changing the capacitance of this variable capacitor, thus working band and working method can be adjusted.
By the first filter 12 and the second filter 13 as tunable optic filter, the radiofrequency signal received is carried out to the filtering of twice, therefore, it is possible to carry out filtering to the radiofrequency signal of two frequency ranges simultaneously by antenna 11.In embodiments of the present invention, by the first filter 12 and the second filter 13 as tunable optic filter, effectively filtering can be carried out to the radiofrequency signal being sent and receive two frequency ranges by carrier aggregation.Certainly, by the first filter 12 and the second filter 13 as tunable optic filter, also filtering can be carried out to the signal of single frequency band.
Such as, when constituting first filter 12 and second filter 13 as shown in Figure 2, working band and the working method of filter is changed by the Piezocapacitor comprised in filter.Now, controller 16 arranges based on the frequency range of the radiofrequency signal received by antenna 11 bias voltage supplied Piezocapacitor, change the capacitance of described Piezocapacitor, thus control working band and the working method of the first filter 12 and the second filter 13.Also can be, when adjusting working band and working method by other tunable parts in the first filter 12 and the second filter 13, controller 16, based on the frequency range of the radiofrequency signal received by antenna 11, suitably controls these other tunable parts.
Particularly, when receiving the radiofrequency signal of carrier aggregation first frequency range and the second frequency range by antenna 11, in step s 2, controller 16 is controlled the first filter 12 and carries out bandpass filtering with the band passband comprising the first frequency range and the second frequency range to the radiofrequency signal received by antenna 11, further, controller 16 controls the second filter 13 and carries out bandreject filtering with the band suppressed frequency band between the first frequency range and the second frequency range to by the radiofrequency signal after the first filter filtering.
Thus, after having carried out twice filtering by the first filter 12 and the second filter 13, the signal of the first frequency range and the second frequency range in the radiofrequency signal after filtering, has only been comprised.Thus, before radio frequency signal amplifies, carry out filtering process, thus can avoid carrying out amplification process to the interference signal outside effective band and noise etc.
Particularly, when controller 16 controls the working band of the first filter 12 and the second filter 13 and working method, Piezocapacitor such as shown in Figure 2 by comprising in filter changes working band and the working method of filter, be suitably arranged on the bias voltage of the Piezocapacitor comprised in filter.Such as, be determined at working band and the working method of the first filter 12 under each bias voltage in advance, be determined at working band and the working method of the second filter 13 under each bias voltage equally in advance, and store working band and the working method of the first filter 12 and the second filter 13 accordingly with each bias voltage.If so, when controller 16 controls the working band of the first filter 12 and working method, the bias voltage of the Piezocapacitor comprised in the first filter 12 is set as the bias voltage corresponding with the working band of first filter that will set and working method.Equally, when controller 16 controls the working band of the second filter 13 and working method, the bias voltage of the Piezocapacitor comprised in the second filter 13 is set as the bias voltage corresponding with the working band of first filter that will set and working method.
In addition, when being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by antenna, in step s 2, the first filter 12 is controlled and the second filter 13 carries out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by antenna collaboratively.
Thus, after having carried out cooperation filtering by the first filter 12 and the second filter 13, the signal of the 3rd frequency range in the radiofrequency signal after filtering, has only been comprised.Thus, before radio frequency signal amplifies, carry out filtering process, thus can avoid carrying out amplification process to the interference signal outside effective band and noise etc.
Particularly, when controller 16 controls the working band of the first filter 12 and the second filter 13 and working method, Piezocapacitor such as shown in Figure 2 by comprising in filter changes working band and the working method of filter, be suitably arranged on the bias voltage of the Piezocapacitor comprised in filter.Such as, be determined at working band when the first filter 12 under each bias voltage and the second filter 13 cooperate and working method in advance, and store the first filter 12 accordingly with each bias voltage and the second filter 13 cooperates time working band and working method.If so, when controller 16 first filter 12 and the second filter 13 carry out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by antenna collaboratively, the bias voltage of the Piezocapacitor comprised in the first filter 12 and the second filter 13 is set as working band when cooperating with first filter 12 that will set and the second filter 13 and the corresponding bias voltage of working method.
In addition, when processing the radiofrequency signal of single frequency band, in step s 2, when being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by antenna 11, control the first filter 12, with the band passband comprising the 3rd frequency range, bandpass filtering is carried out to the radiofrequency signal received by antenna 11, and controller 16 controls the second filter 13 carries out bandpass filtering with the band passband comprising the 3rd frequency range to by the filtered radiofrequency signal of the first filter 12.
Particularly, when controller 16 controls the working band of the first filter 12 and the second filter 13 and working method, Piezocapacitor such as shown in Figure 2 by comprising in filter changes working band and the working method of filter, be suitably arranged on the bias voltage of the Piezocapacitor comprised in filter.As mentioned above, be determined at working band and the working method of the first filter 12 under each bias voltage in advance, be determined at working band and the working method of the second filter 13 under each bias voltage equally in advance, and store working band and the working method of the first filter 12 and the second filter 13 accordingly with each bias voltage.If so, when controller 16 controls the working band of the first filter 12 and working method, the bias voltage of the Piezocapacitor comprised in the first filter 12 is set as the bias voltage corresponding with the working band of first filter that will set and working method.Equally, when controller 16 controls the working band of the second filter 13 and working method, the bias voltage of the Piezocapacitor comprised in the second filter 13 is set as the bias voltage corresponding with the working band of first filter that will set and working method.
In step s3, amplify by the radiofrequency signal after the second filter filtering.
Particularly, when being applied to the electronic equipment 1 of Fig. 1, the amplifier be connected with the second filter 13 accepts the radiofrequency signal after by the second filter filtering, and amplifies it.In embodiments of the present invention, preferably by the amplifier 14 be made up of low noise amplifier, filtered radiofrequency signal is amplified.
And then, in step s 4 which, demodulation is carried out to the radiofrequency signal after being amplified by amplifier.
Particularly, when being applied to the electronic equipment 1 of Fig. 1, the radiofrequency signal demodulator be connected with amplifier 14 accepts the radiofrequency signal after being amplified by amplifier 14, and carries out demodulation to it.
In addition, in embodiments of the present invention, can as required, and then the signal after demodulation is carried out to the process of decoding etc.
Control method according to the embodiment of the present invention, by carrying out based on the frequency range of radiofrequency signal the first filter of controlling and the second filter carries out filtering to the radiofrequency signal received by antenna, and then be sent to radiofrequency signal demodulator after filtered radiofrequency signal is amplified.Therefore, the signal carrying out demodulation is through filtering and the radiofrequency signal of amplifying, and signal strength signal intensity obviously strengthens.Thus, effectively can be strengthened the quality of the radiofrequency signal received by antenna by simple structure, antenna can be tackled and become interference that is large and noise to the long loss caused of the transmission line of radiofrequency signal demodulator.
Each execution mode of the present invention is described in detail above.But, it should be appreciated by those skilled in the art that without departing from the principles and spirit of the present invention, various amendment can be carried out to these execution modes, combination or sub-portfolio, and such amendment should fall within the scope of the present invention.
Claims (10)
1. an electronic equipment, comprising:
Antenna, configuration carrys out received RF signal;
First filter, is connected with described antenna, and configuration carries out filtering to the radiofrequency signal received by described antenna;
Second filter, is connected with described first filter, and configuration carries out filtering to by the radiofrequency signal after described first filter filtering;
Amplifier, is connected with described second filter, and configuration is amplified by the radiofrequency signal after described second filter filtering;
Radiofrequency signal demodulator, is connected with described amplifier, configures and carries out demodulation to by the radiofrequency signal after described amplifier amplification; And
Controller, is connected with described first filter and described second filter, configures the frequency range based on the radiofrequency signal received by described antenna, controls working band and the working method of described first filter and described second filter.
2. electronic equipment as claimed in claim 1, wherein,
When receiving the radiofrequency signal of carrier aggregation first frequency range and the second frequency range by described antenna, described controller is controlled described first filter and carries out bandpass filtering with the band passband comprising the first frequency range and the second frequency range to the radiofrequency signal received by described antenna, further, described second filter of described controller control carries out bandreject filtering with the band suppressed frequency band between the first frequency range and the second frequency range to by the radiofrequency signal after described first filter filtering.
3. electronic equipment as claimed in claim 2, wherein,
When being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by described antenna, described controller controls described first filter and described second filter carries out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by described antenna collaboratively.
4. electronic equipment as claimed in claim 2, wherein,
When being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by described antenna, described controller is controlled described first filter and carries out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by described antenna, and described second filter of described controller control carries out bandpass filtering with the band passband comprising the 3rd frequency range to by the radiofrequency signal after described first filter filtering.
5. electronic equipment as claimed in claim 1, wherein,
Described first filter and described second filter comprise Piezocapacitor respectively,
Described controller arranges based on the frequency range of the radiofrequency signal received by described antenna the bias voltage supplied described Piezocapacitor, change the capacitance of described Piezocapacitor, thus control working band and the working method of described first filter and described second filter.
6. a control method, is applied to electronic equipment, and described control method comprises:
By antenna received RF signal;
Based on the frequency range of the radiofrequency signal received by described antenna, control working band and the working method of the first filter and the second filter, by described first filter, filtering is carried out to the radiofrequency signal received by described antenna, and carry out filtering by described second filter to by the radiofrequency signal after described first filter filtering;
Amplify by the radiofrequency signal after described second filter filtering;
Demodulation is carried out to the radiofrequency signal after being amplified by described amplifier.
7. control method as claimed in claim 6, wherein,
In the frequency range based on the radiofrequency signal received by described antenna, control working band and the working method of the first filter and the second filter, by described first filter, filtering is carried out to the radiofrequency signal received by described antenna, and carried out in the step of filtering by the radiofrequency signal after described first filter filtering by described second filter
When receiving the radiofrequency signal of carrier aggregation first frequency range and the second frequency range by described antenna, control described first filter, with the band passband comprising the first frequency range and the second frequency range, bandpass filtering is carried out to the radiofrequency signal received by described antenna, and control described second filter and carry out bandreject filtering with the band suppressed frequency band between the first frequency range and the second frequency range to by the radiofrequency signal after described first filter filtering.
8. control method as claimed in claim 7, wherein,
In the frequency range based on the radiofrequency signal received by described antenna, control working band and the working method of the first filter and the second filter, by described first filter, filtering is carried out to the radiofrequency signal received by described antenna, and carried out in the step of filtering by the radiofrequency signal after described first filter filtering by described second filter
When being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by described antenna, control described first filter and described second filter carries out bandpass filtering with the band passband comprising the 3rd frequency range to the radiofrequency signal received by described antenna collaboratively.
9. control method as claimed in claim 7, wherein,
In the frequency range based on the radiofrequency signal received by described antenna, control working band and the working method of the first filter and the second filter, by described first filter, filtering is carried out to the radiofrequency signal received by described antenna, and carried out in the step of filtering by the radiofrequency signal after described first filter filtering by described second filter
When being received the radiofrequency signal of the 3rd frequency range of not carrying out carrier aggregation by described antenna, control described first filter, with the band passband comprising the 3rd frequency range, bandpass filtering is carried out to the radiofrequency signal received by described antenna, and control described second filter and carry out bandpass filtering with the band passband comprising the 3rd frequency range to by the radiofrequency signal after described first filter filtering.
10. control method as claimed in claim 6, wherein,
In the frequency range based on the radiofrequency signal received by described antenna, control in the working band of the first filter and the second filter and the step of working method,
Bias voltage to the Piezocapacitor supply comprised respectively in described first filter and described second filter is set based on control signal, changes the capacitance of described Piezocapacitor, thus control described first filter and described second filter.
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| US20150009079A1 (en) * | 2013-07-02 | 2015-01-08 | Wispry | Filtering antenna systems, devices, and methods |
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| CN1860682A (en) * | 2003-11-11 | 2006-11-08 | 富士通株式会社 | Semiconductor device, radio terminal and radio communication unit |
| CN102124658A (en) * | 2008-08-21 | 2011-07-13 | 剑桥硅无线电有限公司 | Tuneable filter |
| CN101847976A (en) * | 2009-03-27 | 2010-09-29 | 奎兰股份有限公司 | Utilize signal to eliminate the filter shape of function |
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| US20150009079A1 (en) * | 2013-07-02 | 2015-01-08 | Wispry | Filtering antenna systems, devices, and methods |
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