CN101873382B - Mobile phone, and method and device for dynamically tuning television internal antenna thereof - Google Patents
Mobile phone, and method and device for dynamically tuning television internal antenna thereof Download PDFInfo
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- CN101873382B CN101873382B CN201010213818.3A CN201010213818A CN101873382B CN 101873382 B CN101873382 B CN 101873382B CN 201010213818 A CN201010213818 A CN 201010213818A CN 101873382 B CN101873382 B CN 101873382B
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Abstract
The invention relates to a mobile phone, and a method and a device for dynamically tuning a television internal antenna thereof. The method for dynamically tuning the television internal antenna of the mobile phone comprises the following steps that: a mobile phone baseband circuit receives a frequency band selection signal and a frequency channel selection signal, controls a television receiving chip to be tuned to the selected frequency band and frequency channel, connects the internal antenna to a corresponding tuning network of a plurality of tuning networks in an electronic tuning circuit through the frequency band selection switch based on the selected frequency band so as to set the electronic tuning circuit in the selected frequency band, and regulates the electronic tuning circuit based on the selected frequency channel to make the electronic tuning circuit reach the tuning point of the selected frequency channel. In the invention, an optimal receiving frequency point can be dynamically changed to be synchronous with a television channel to be watched so as to realize the dynamical tuning matching with an optimal sensitivity and improve the receiving sensitivity of an antenna system. Moreover, the invention has the advantages of stable performance, low cost and small volume.
Description
Technical field
The present invention relates to communication equipment, more particularly, relate to a kind of dynamically tuning television internal antenna method and device that is built in the television receiver in portable communication device.
Background technology
Along with the development of communication network and the continuous expansion of business, mobile communication terminal device for example mobile phone has become the necessity of people's routine work, life.User is also more and more to the functional requirement of mobile phone, and for example many users wish mobile phone configuration TV functions, to watch its interested program between facilitating at one's leisure.Mobile-phone manufacturers develop the mobile phone with TV functions thus.At present the antenna of mobile TV can be divided into two kinds of built-in and external antennas.
The receive frequency range of mobile TV is from 150MHz-870MHz, and in order normally to receive wide band signal, the antenna of mobile TV must have corresponding bandwidth of operation.
In order to obtain very wide bandwidth of operation, existing Mobile phone television antenna great majority have all adopted the form of telescopic antenna, adjust the working band of antenna in work by the mode of artificial adjustment antenna length.This mode has following shortcoming: 1, and size is larger, and in order to reach enough bandwidth, when antenna is all pulled out, length can surpass 30cm, is inconvenient to carry.2, cannot make built-in aerial, affect product appearance.3, during manual tuning, due to the contact of staff, affect tuning precision.
Built-in aerial adopts pcb board to make, and advantage is that volume is little, easy to use, so mobile TV built-in aerial has become a kind of trend.The part but it also comes with some shortcomings, for example receiving sensitivity is low, and the beamwidth of antenna is narrow, high directivity.
Owing to making after built-in aerial, contraction in length, can cause receiving sensitivity to decline, and the beamwidth of antenna narrows down.Generally speaking, in the free transmission range of 150MHz-870MHz, be illustrated in figure 1 the band diagram of the television internal antenna of prior art, in figure, can find out that the frequency band of this antenna can only cover very narrow region.It is the highest only having the receiving sensitivity of a Frequency point (fixing), and other Frequency points are all low than this Frequency point.And more by passband edge receiving sensitivity, fall lowlyer.Therefore, under the different frequency that existing built-in aerial technology causes after existing built-in aerial bandwidth to narrow down, the problem that receiving sensitivity is different.
Summary of the invention
The technical problem to be solved in the present invention is, for the mobile TV built-in aerial optimum reception Frequency point of prior art, fixes, and the different defect of receiving sensitivity under different frequency, provides a kind of mobile TV built-in aerial dynamic tuning method.
Another technical problem that the present invention will solve is, for the mobile TV built-in aerial optimum reception Frequency point of prior art, fixes, and the different defect of receiving sensitivity under different frequency, provides a kind of mobile TV built-in aerial dynamic tuning device.
The another technical problem that the present invention will solve is, mobile TV built-in aerial optimum reception Frequency point for prior art is fixed, the different defect of receiving sensitivity under different frequency, provides a kind of mobile phone that disposes mobile TV built-in aerial dynamic tuning device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of mobile TV built-in aerial dynamic tuning method is provided, comprises:
Mobile phone baseband circuit receives Frequency Band Selection signal and channel selecting signal;
Mobile phone baseband circuit control television reception chip be tuned to selected frequency range and channel;
Also comprise:
Mobile phone baseband circuit is connected in an electronic tuning circuit corresponding tuning network in a plurality of tuning networks by Frequency Band Selection switch by described built-in aerial based on selected frequency range, so that described electronic tuning circuit is arranged on to selected frequency range;
Mobile phone baseband circuit is adjusted corresponding tuning network based on selected channel, so that electronic tuning circuit arrives the tuning point of selected channel.
In mobile TV built-in aerial dynamic tuning method of the present invention, described television reception chip is sent to described mobile phone baseband circuit by the strength information of the TV signal receiving;
The strength information of the TV signal of described mobile phone baseband circuit based on received, finely tunes corresponding tuning network.
In mobile TV built-in aerial dynamic tuning method of the present invention, mobile phone baseband circuit is adjusted and is comprised electronic tuning circuit based on selected channel: mobile phone baseband processor is based on selected channel fix and control the output voltage of digital to analog converter, in order to the variable capacitance diode in tuning network is finely tuned.
In mobile TV built-in aerial dynamic tuning method of the present invention, described mobile phone baseband circuit comprises based on selected channel fix the output voltage of controlling digital to analog converter: based on frequency-voltage relationship table, search the digital to analog converter output voltage of corresponding selected channel, or based on frequency-voltage relationship algorithm, calculate the digital to analog converter output voltage of corresponding selected channel.
The present invention solves another technical scheme that its technical problem adopts: construct a kind of mobile TV built-in aerial dynamic tuning device, it is characterized in that, comprise mobile phone baseband circuit, and the electronic tuning circuit being connected with described mobile phone baseband circuit with mobile TV built-in aerial, the output of described electronic tuning circuit is coupled to the television reception chip in mobile phone; Wherein, described electronic tuning circuit comprises Frequency Band Selection switch and a plurality of tuning network, and described Frequency Band Selection switch is connected with described mobile phone baseband circuit respectively with described tuning network; Wherein, described mobile phone baseband circuit comprises:
Frequency Band Selection signal receiving module;
Channel selecting signal receiver module;
Television reception chip frequency range arranges control module, for the Frequency Band Selection signal controlling television reception chip based on received, adjusts to selected frequency range;
Television reception chip channel arranges control module, for channel selecting signal based on received control television reception chip be tuned to selected channel;
Frequency Band Selection switch control module, for Frequency Band Selection switch described in the Frequency Band Selection signal controlling based on received, described built-in aerial is connected to a corresponding tuning network of described a plurality of tuning networks, so that described electronic tuning circuit is arranged on to selected frequency range;
Tuning network control module, adjusts corresponding tuning network for the channel selecting signal based on received, so that electronic tuning circuit arrives the tuning point of selected channel.
In mobile TV built-in aerial dynamic tuning device of the present invention, described mobile phone baseband circuit also comprises:
TV signal intensity information receiving module, for receiving the TV signal intensity information from television reception chip:
Fine setting module, finely tunes corresponding tuning network for the TV signal intensity information based on receiving.
In mobile TV built-in aerial dynamic tuning device of the present invention, described electronic tuning circuit comprises digital to analog converter, each in described a plurality of tuning network comprises variable capacitance diode, and the output of digital to analog converter is connected described in the negative pole of described variable capacitance diode; The input of described digital to analog converter is connected with described mobile phone baseband processor.
The present invention solves the another technical scheme that its technical problem adopts: construct a kind of mobile phone, it is characterized in that, comprise mobile phone baseband circuit and coupled television reception chip, mobile TV built-in aerial, and be connected to the electronic tuning circuit between described mobile TV built-in aerial and described television reception chip; Described electronic tuning circuit comprises Frequency Band Selection switch and a plurality of tuning network; Described Frequency Band Selection switch is connected with described mobile phone baseband circuit respectively with described tuning network; Wherein, described mobile phone baseband processor comprises:
Frequency Band Selection signal receiving module;
Channel selecting signal receiver module;
Television reception chip frequency range arranges control module, for the Frequency Band Selection signal controlling television reception chip based on received, adjusts to selected frequency range;
Television reception chip channel arranges control module, for channel selecting signal based on received control television reception chip be tuned to selected channel;
Frequency Band Selection switch control module, for Frequency Band Selection switch described in the Frequency Band Selection signal controlling based on received, described built-in aerial is connected to a corresponding tuning network of described a plurality of tuning networks, so that described electronic tuning circuit is arranged on to selected frequency range;
Tuning network control module, adjusts corresponding tuning network for the channel selecting signal based on received, so that electronic tuning circuit arrives the tuning point of selected channel.
In mobile phone of the present invention, described mobile phone baseband circuit also comprises:
TV signal intensity information receiving module, for receiving the TV signal intensity information from television reception chip;
Fine setting module, finely tunes corresponding tuning network for the TV signal intensity information based on receiving.
In mobile phone of the present invention, described electronic tuning circuit comprises digital to analog converter, and each in described a plurality of tuning networks comprises variable capacitance diode, and the negative pole of described variable capacitance diode is connected with the output of described digital to analog converter; The input of described digital to analog converter is connected with described mobile phone baseband processor.
Implement the present invention, there is following beneficial effect: the present invention controls electronic tuning circuit by mobile phone baseband processor, can dynamically change optimum reception Frequency point, it is synchronizeed with the current television channel that will watch, to realize optimum sensitivity dynamic tuning coupling.Thereby solved the problem that the beamwidth of antenna narrows down, further improved the receiving sensitivity of antenna system.
In addition, owing to adopting software and hardware combining to realize mobile TV built-in aerial dynamic tuning device of the present invention, make this device there is stable performance, cost is low, volume is little advantage.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the band diagram of the mobile TV built-in aerial of prior art;
Fig. 2 is the structural representation of embedded in mobile phone television receiver according to an embodiment of the invention;
Fig. 3 is according to the module map of the mobile phone baseband circuit in mobile phone of the present invention;
Fig. 4 is the schematic diagram of the electronic tuning circuit in embedded in mobile phone television receiver according to an embodiment of the invention;
Fig. 5 is according to the flow chart of mobile TV built-in aerial dynamic tuning method of the present invention;
Fig. 6 is the flow chart of the course of work of embedded in mobile phone television receiver according to an embodiment of the invention;
Fig. 7 is according to the band diagram of mobile TV built-in aerial of the present invention.
Embodiment
The present invention conceives a kind of electronic tuning technical scheme, utilizes technical scheme of the present invention can abandon large-sized telescopic antenna and use less built-in aerial and guarantee its receptivity.
Fig. 2 is the structural representation of embedded in mobile phone television receiver according to an embodiment of the invention.As shown in Figure 2, embedded in mobile phone television receiver comprises mobile TV built-in aerial 6, electronic tuning circuit 1, television reception chip 2 and mobile phone baseband circuit 3.Wherein, electronic tuning circuit 1 comprises Frequency Band Selection switch 11, tuning network 12a-12c, low noise amplifier 13a-3c and digital to analog converter (DAC) 14.Mobile TV built-in aerial 6 is connected in Frequency Band Selection switch 11.The output of Frequency Band Selection switch 11 is connected with the 3rd tuning network 12c with the first tuning network 12a, second tune network 12b respectively, in order to built-in aerial is connected to the tuning network corresponding with selected TV band and channel.The first tuning network 12a, second tune network 12b and the 3rd tuning network 12c are connected to television reception chip 2 by low noise amplifier 13a-13c respectively.
In the present embodiment, each in tuning network 12a-12c comprises a variable capacitance diode, and the negative pole of variable capacitance diode is connected with the output of digital to analog converter 14.By changing the output voltage of digital to analog converter, can change the electric capacity of variable capacitance diode, thereby make electronic tuning circuit arrive the tuning point of selected channel.For realizing frequency range setting and channel tuning, mobile phone baseband circuit 3 has an I/O port to be connected to Frequency Band Selection switch 11, for exporting Frequency Band Selection signal; Mobile phone baseband circuit 3 also has an I/O port to be connected to DAC 14, for receiving from the data of mobile phone baseband circuit 3 and converting analog voltage to, thereby generate output, controls voltage.In addition, mobile phone baseband circuit 3 has an I/O port for transmitting control signal to television reception chip 2, with control television reception chip 2 be tuned to selected frequency range and channel.As selection, mobile phone baseband circuit 3 has an IO port for receive the signal strength signal intensity report about TV signal intensity information from television reception chip 2.
In the present embodiment, the difficulty realizing in order to reduce circuit, is divided into three sections of difference whole frequency band tuning, and three tuning networks for example, are connected with built-in aerial 6 by Frequency Band Selection switch (can select the HF switch of SP3T) 11.In tuning network, include variable capacitance diode, can change its capacitance according to applied voltage, thereby change the match parameter of network, realize the conversion of input impedance.The input control signal of electronic tuning circuit has two, and one is Frequency Band Selection signal, and this signal deciding built-in aerial is connected with which in three networks, and this signal is provided by mobile phone baseband circuit.Another control signal is tuning voltage, and this signal is provided by DAC analog to digital converter.In the present embodiment, can for example, in the memory (nonvolatile storage FLASH) of mobile phone frequency-voltage relationship table or frequency-voltage relationship algorithm of store electrons tuning circuit, while needing received television signal, mobile phone baseband circuit 3, specifically, that tuning network control module 34 is wherein called this frequency-voltage relationship table or frequency-voltage relationship algorithm, based on selected channel, search the output voltage of corresponding digital to analog converter, or calculate the output voltage of corresponding digital to analog converter, and control the output of digital to analog converter.The principle of electronic tuning circuit as shown in Figure 4.
In the present embodiment, tuning voltage is continuous variable, can obtain very high tuning precision.As an alternative, in another embodiment, can cancel digital to analog converter (DAC), and realize segmented tuning with several fixed voltages, but tuning precision can be lower.
In addition, also can use other tuning methods: for example, utilize some fixed capacities, by switch, select, reach tuning object; Or, utilizing several groups of fixed partial pressure, tunable varactor diode, reaches tuning object.Before a kind of be fixed capacity method, can save varactor and DAC; A kind of is afterwards fixed resistance method, can save DAC.But these two kinds of methods all belong to discontinuous tuning, and precision is on the low side.
These two kinds of methods all need mobile phone baseband processor to participate in, and need software to realize.In concrete enforcement, fixed capacity method utilizes several fixed capacities to substitute variable capacitance diode, and selects different electric capacity (according to current frequency) by a variable connector, reaches tuning object.In this scheme, mobile phone baseband processor, based on selected channel, draws to connect which electric capacity by algorithm or lookup table mode, and outputs control signals to variable connector, makes it be connected to needed that electric capacity.
Fixed resistance method utilizes a variable connector and several fixed resistance to form network, replaces DAC chip, according to current frequency, mates different resistance, produces corresponding magnitude of voltage, de-tuned variable capacitance diode after dividing potential drop.In this scheme, mobile phone baseband processor, based on selected channel, draws and need to be mated great resistance by algorithm or lookup table mode, and outputs control signals to variable connector, makes it be connected to needed build-out resistor.
Fig. 3 is that mobile phone baseband circuit 3 includes microprocessor according to the module map of the mobile phone baseband circuit 3 in mobile phone of the present invention, can control electronic tuning circuit 1 and television reception chip 2.As shown in Figure 3, mobile phone baseband circuit 3 comprises Frequency Band Selection signal receiving module 31; Channel selecting signal receiver module 32; Television reception chip frequency range arranges control module 38, for the Frequency Band Selection signal controlling television reception chip based on received, adjusts to selected frequency range; Television reception chip channel arranges control module 33, for channel selecting signal based on received control television reception chip be tuned to selected channel; Frequency Band Selection switch control module 37, is connected to built-in aerial a corresponding tuning network of a plurality of tuning networks for the Frequency Band Selection signal controlling Frequency Band Selection switch based on received, so that electronic tuning circuit is arranged on to selected frequency range; Tuning network control module 34, adjusts corresponding tuning network for the channel selecting signal based on received, so that electronic tuning circuit arrives the tuning point of selected channel.Also comprise: TV signal intensity information receiving module 35, for receiving the TV signal intensity information from television reception chip; Fine setting module 36, finely tunes electronic tuning circuit for the TV signal intensity information based on receiving.In Fig. 3, TV signal intensity information receiving module 35 and fine setting module 36 adopt dotted line frame, represent that these two assemblies are options, in other embodiments, also can not comprise these two assemblies.
With respect to previous embodiment, each in tuning network 12a-12c comprises a variable capacitance diode, and the negative pole of variable capacitance diode is connected with the output of digital to analog converter (DAC) 14.Frequency Band Selection switch 11 and DAC 14 receive respectively Frequency Band Selection signal and the control voltage signal of the output of Frequency Band Selection switch control module 37 and tuning network control module 34.
Fig. 4 is the schematic diagram of the electronic tuning circuit in embedded in mobile phone television receiver according to an embodiment of the invention.As shown in Figure 4, antenna is connected with three tuning networks by Frequency Band Selection switch U1.In the present embodiment, what Frequency Band Selection switch adopted is the HF switch of SP3T, and it has three output RX3, RX2 and RX1, is connected to respectively the 3rd tuning network, the first tuning network and second tune network; Its input V1, V2 and V3 (pin one, 12 and 4) are connected in mobile phone baseband circuit, for receiving Frequency Band Selection signal.As selection, Frequency Band Selection switch can also adopt and comprise one of a plurality of band pass filters and enter to have more frequency-selecting module and realize.
The first tuning network is for VHF1 frequency range, and as shown in Figure 4, it comprises the second variable capacitance diode D2, the second capacitor C 2, the 3rd capacitor C 3, the first resistance R 1, the 3rd inductance L 3, the 4th inductance L 4 and the 5th inductance L 5.Wherein, the positive pole of the second variable capacitance diode D2 is connected with the RX2 end (pin 5) of the HF switch U1 of SP3T by the second capacitor C 2, and the negative pole of the second variable capacitance diode D2 is connected with the input of television reception chip by the 3rd capacitor C 3; The RX2 that the 3rd inductance L 3 is connected to the HF switch U1 of SP3T holds between (pin 5) and the input of television reception chip; The 4th inductance L 4 is connected between the second capacitor C 2 and the node and ground of the second variable capacitance diode D2; The 5th inductance L 5 is connected between the 3rd capacitor C 3 and the node and ground of the 3rd inductance L 3; In addition, the negative pole of the second variable capacitance diode D2 is also connected to the output of DAC by the first resistance R 1.
Second tune network is for VHF2 frequency range, and as shown in Figure 4, it comprises the 3rd variable capacitance diode D3, the 3rd resistance R 3 and the 6th inductance L 6.Wherein, the plus earth of the 3rd variable capacitance diode D3; The negative pole of the 3rd variable capacitance diode D3 is connected in the RX1 end (pin 8) of the HF switch U1 of SP3T by the 6th inductance L 6, and by the 3rd resistance R 3, is connected to the output of DAC, is also connected in the input of television reception chip.
The 3rd tuning network is for uhf band, and as shown in Figure 4, it comprises the first variable capacitance diode D1, the first capacitor C 1, the 4th capacitor C 4, the second resistance R 2, the first inductance L 1, the second inductance L 2 and the 7th inductance L 7.Wherein, the positive pole of the first variable capacitance diode D1 is connected with the RX3 end (pin two) of the HF switch U1 of SP3T by the first capacitor C 1, and the negative pole of the first variable capacitance diode D2 is connected with the input of television reception chip by the 4th capacitor C 4; The RX3 that the first inductance L 1 is connected to the HF switch U1 of SP3T holds between (pin two) and the input of television reception chip; The second inductance L 2 is connected between the first capacitor C 1 and the node and ground of the first variable capacitance diode D1; The 7th inductance L 7 is connected between the 4th capacitor C 4 and the node and ground of the first inductance L 1; In addition, the negative pole of the first variable capacitance diode D1 is also connected to the output of DAC by the second resistance R 2.
In addition, it should be noted that, signal, from tuning network output, before entering television reception chip, can first amplify by low noise amplifier (13a-13c as shown in Figure 2).In addition, although the present invention be take three tuning networks as example is described, the invention is not restricted to this.The present invention also can comprise two tuning networks, or four, five or more tuning network, to receive the program of different frequency range.
Fig. 5 is according to the flow chart of mobile TV built-in aerial dynamic tuning method of the present invention.As shown in Figure 5, after starting step 510, carry out step 520, mobile phone baseband circuit receives Frequency Band Selection signal and channel selecting signal.In step 530, mobile phone baseband circuit control television reception chip be tuned to selected frequency range and channel.In step 540, mobile phone baseband circuit is connected in an electronic tuning circuit corresponding tuning network in a plurality of tuning networks by Frequency Band Selection switch by described built-in aerial based on selected frequency range, so that described electronic tuning circuit is arranged on to selected frequency range.In step 550, mobile phone baseband circuit is adjusted corresponding tuning network based on selected channel, so that electronic tuning circuit arrives the tuning point of selected channel.Afterwards, in step 560, television reception chip is sent to described mobile phone baseband circuit by the strength information of the TV signal receiving.In step 570, the strength information of the TV signal of mobile phone baseband circuit based on received, finely tunes corresponding tuning network.Step 580, tuning process finishes.
In Fig. 5, step 560 and step 570 are optional steps, in certain embodiments, can save this two steps, do not finely tune.In addition, in further embodiments, can also repeat step 550 and 560, TV signal intensity be carried out to Real-Time Monitoring, and accordingly variable capacitance diode is finely tuned.
Fig. 6 is the flow chart of the course of work of embedded in mobile phone television receiver according to an embodiment of the invention, and it comprises variable capacitance diode corresponding to tuning network, controls the embodiment of the capacitance of variable capacitance diode by DAC.As shown in Figure 6, in step 610, start embedded in mobile phone television receiver, for example, after receiving user's instruction.In step 620, television reception chip is carried out to initialization process.In step 630, after receiving user's frequency range and channel selection instruction, mobile phone baseband circuit is set to the required frequency range of user and channel by television reception chip.In step 640, electronic tuning circuit is set to working frequency range (being selected frequency range).In step 650, the frequency of the channel of mobile phone baseband circuit based on receiving and the frequency-voltage relationship of electronic tuning circuit, DAC output voltage (for example, by tabling look-up or calculating) is set, and utilizes DAC to go to drive variable capacitance diode to make electronic tuning circuit arrive this channel resonance point.In step 660, mobile phone baseband circuit receives the TV signal intensity report from television reception chip.Afterwards, in step 670, whether mobile phone baseband circuit judges TV signal intensity meets the requirements.In this way, return to step 660, continue monitoring TV signal strength signal intensity.As no, return and carry out step 680, the output voltage of DAC is finely tuned.After step 680, return to again 660, continue monitoring TV signal strength signal intensity.Step 660 is carried out repeatedly to 680, so that TV signal intensity is monitored in real time and to be adjusted, until closing hand phone built-in television receiver.
Fig. 7 is according to the band diagram of mobile TV built-in aerial of the present invention.It shows after dynamic tuning, and the working band of narrow band antenna can dynamically change, thereby reaches the object that broadband covers.
The present invention proposes the method for built-in aerial+electronic tuning, realized the miniaturization of Mobile phone television antenna.Compared to existing technology, there is following advantage:
1, realized antenna miniaturization, by dynamic electron tunable technology, can make the working band dynamic change of the built-in aerial of narrow-band, thereby meet wide band performance requirement, this just makes the use of built-in aerial become possibility.
2, use small size antenna, just antenna can be placed into interior of mobile phone, make the design of product appearance more flexible, profile is more attractive in appearance.
3, electronic tuning technology is higher than the manual tuning technology acuracy of telescopic antenna.
4, utilize this technology can use the built-in aerial of arrowband to replace bulky telescopic antenna, be conducive to reduce the volume of product, improve portable.
Claims (4)
1. a mobile TV built-in aerial dynamic tuning device, it is characterized in that, comprise mobile phone baseband circuit, and the electronic tuning circuit being connected with described mobile phone baseband circuit with mobile TV built-in aerial, the output of described electronic tuning circuit is coupled to the television reception chip in mobile phone; Wherein, described electronic tuning circuit comprises Frequency Band Selection switch and a plurality of tuning network, and described Frequency Band Selection switch is connected with described mobile phone baseband circuit respectively with described tuning network; Wherein, described mobile phone baseband circuit comprises:
Frequency Band Selection signal receiving module;
Channel selecting signal receiver module;
Television reception chip frequency range arranges control module, for the Frequency Band Selection signal controlling television reception chip based on received, adjusts to selected frequency range;
Television reception chip channel arranges control module, for channel selecting signal based on received control television reception chip be tuned to selected channel;
Frequency Band Selection switch control module, for Frequency Band Selection switch described in the Frequency Band Selection signal controlling based on received, described built-in aerial is connected to a corresponding tuning network of described a plurality of tuning networks, so that described electronic tuning circuit is arranged on to selected frequency range;
Tuning network control module, adjusts corresponding tuning network for the channel selecting signal based on received, so that electronic tuning circuit arrives the tuning point of selected channel;
Wherein,
Described electronic tuning circuit comprises digital to analog converter, and each in described a plurality of tuning networks comprises variable capacitance diode, and the output of digital to analog converter is connected described in the negative pole of described variable capacitance diode; The input of described digital to analog converter is connected with described mobile phone baseband circuit, and wherein tuning voltage is continuous variable;
Described a plurality of tuning network comprises the first tuning network, second tune network and the 3rd tuning network, wherein
The first tuning network is for VHF1 frequency range, and it comprises the second variable capacitance diode D2, the second capacitor C 2, the 3rd capacitor C 3, the first resistance R 1, the 3rd inductance L 3, the 4th inductance L 4 and the 5th inductance L 5; Wherein, the positive pole of the second variable capacitance diode D2 is connected with the RX2 end of the HF switch U1 of SP3T by the second capacitor C 2, and the negative pole of the second variable capacitance diode D2 is connected with the input of television reception chip by the 3rd capacitor C 3; The 3rd inductance L 3 is connected between the RX2 end of HF switch U1 and the input of television reception chip of SP3T; The 4th inductance L 4 is connected between the second capacitor C 2 and the node and ground of the second variable capacitance diode D2; The 5th inductance L 5 is connected between the 3rd capacitor C 3 and the node and ground of the 3rd inductance L 3; And the negative pole of the second variable capacitance diode D2 is connected to the output of DAC by the first resistance R 1;
Second tune network is for VHF2 frequency range, and it comprises the 3rd variable capacitance diode D3, the 3rd resistance R 3 and the 6th inductance L 6; Wherein, the plus earth of the 3rd variable capacitance diode D3; The RX1 that the negative pole of the 3rd variable capacitance diode D3 is connected in the HF switch U1 of SP3T by the 6th inductance L 6 holds, and by the 3rd resistance R 3, is connected to the output of DAC, is connected in the input of television reception chip;
The 3rd tuning network is for uhf band, and it comprises the first variable capacitance diode D1, the first capacitor C 1, the 4th capacitor C 4, the second resistance R 2, the first inductance L 1, the second inductance L 2 and the 7th inductance L 7; Wherein, the positive pole of the first variable capacitance diode D1 is connected with the RX3 end of the HF switch U1 of SP3T by the first capacitor C 1, and the negative pole of the first variable capacitance diode D1 is connected with the input of television reception chip by the 4th capacitor C 4; The first inductance L 1 is connected between the RX3 end of HF switch U1 and the input of television reception chip of SP3T; The second inductance L 2 is connected between the first capacitor C 1 and the node and ground of the first variable capacitance diode D1; The 7th inductance L 7 is connected between the 4th capacitor C 4 and the node and ground of the first inductance L 1; And the negative pole of the first variable capacitance diode D1 is connected to the output of DAC by the second resistance R 2.
2. mobile TV built-in aerial dynamic tuning device according to claim 1, is characterized in that, described mobile phone baseband circuit also comprises:
TV signal intensity information receiving module, for receiving the TV signal intensity information from television reception chip;
Fine setting module, finely tunes corresponding tuning network for the TV signal intensity information based on receiving.
3. a mobile phone, is characterized in that, comprises mobile phone baseband circuit and coupled television reception chip, mobile TV built-in aerial, and be connected to the electronic tuning circuit between described mobile TV built-in aerial and described television reception chip; Described electronic tuning circuit comprises Frequency Band Selection switch and a plurality of tuning network; Described Frequency Band Selection switch is connected with described mobile phone baseband circuit respectively with described tuning network; Wherein, described mobile phone baseband circuit comprises:
Frequency Band Selection signal receiving module;
Channel selecting signal receiver module;
Television reception chip frequency range arranges control module, for the Frequency Band Selection signal controlling television reception chip based on received, adjusts to selected frequency range;
Television reception chip channel arranges control module, for channel selecting signal based on received control television reception chip be tuned to selected channel;
Frequency Band Selection switch control module, for Frequency Band Selection switch described in the Frequency Band Selection signal controlling based on received, described built-in aerial is connected to a corresponding tuning network of described a plurality of tuning networks, so that described electronic tuning circuit is arranged on to selected frequency range;
Tuning network control module, adjusts corresponding tuning network for the channel selecting signal based on received, so that electronic tuning circuit arrives the tuning point of selected channel;
Wherein,
Described electronic tuning circuit comprises digital to analog converter, and each in described a plurality of tuning networks comprises variable capacitance diode, and the output of digital to analog converter is connected described in the negative pole of described variable capacitance diode; The input of described digital to analog converter is connected with described mobile phone baseband circuit;
Described a plurality of tuning network comprises the first tuning network, second tune network and the 3rd tuning network, wherein
The first tuning network is for VHF1 frequency range, and it comprises the second variable capacitance diode D2, the second capacitor C 2, the 3rd capacitor C 3, the first resistance R 1, the 3rd inductance L 3, the 4th inductance L 4 and the 5th inductance L 5; Wherein, the positive pole of the second variable capacitance diode D2 is connected with the RX2 end of the HF switch U1 of SP3T by the second capacitor C 2, and the negative pole of the second variable capacitance diode D2 is connected with the input of television reception chip by the 3rd capacitor C 3; The 3rd inductance L 3 is connected between the RX2 end of HF switch U1 and the input of television reception chip of SP3T; The 4th inductance L 4 is connected between the second capacitor C 2 and the node and ground of the second variable capacitance diode D2; The 5th inductance L 5 is connected between the 3rd capacitor C 3 and the node and ground of the 3rd inductance L 3; And the negative pole of the second variable capacitance diode D2 is connected to the output of DAC by the first resistance R 1;
Second tune network is for VHF2 frequency range, and it comprises the 3rd variable capacitance diode D3, the 3rd resistance R 3 and the 6th inductance L 6; Wherein, the plus earth of the 3rd variable capacitance diode D3; The RX1 that the negative pole of the 3rd variable capacitance diode D3 is connected in the HF switch U1 of SP3T by the 6th inductance L 6 holds, and by the 3rd resistance R 3, is connected to the output of DAC, is connected in the input of television reception chip;
The 3rd tuning network is for uhf band, and it comprises the first variable capacitance diode D1, the first capacitor C 1, the 4th capacitor C 4, the second resistance R 2, the first inductance L 1, the second inductance L 2 and the 7th inductance L 7; Wherein, the positive pole of the first variable capacitance diode D1 is connected with the RX3 end of the HF switch U1 of SP3T by the first capacitor C 1, and the negative pole of the first variable capacitance diode D1 is connected with the input of television reception chip by the 4th capacitor C 4; The first inductance L 1 is connected between the RX3 end of HF switch U1 and the input of television reception chip of SP3T; The second inductance L 2 is connected between the first capacitor C 1 and the node and ground of the first variable capacitance diode D1; The 7th inductance L 7 is connected between the 4th capacitor C 4 and the node and ground of the first inductance L 1; And the negative pole of the first variable capacitance diode D1 is connected to the output of DAC by the second resistance R 2.
4. mobile phone according to claim 3, is characterized in that, described mobile phone baseband circuit also comprises:
TV signal intensity information receiving module, for receiving the TV signal intensity information from television reception chip;
Fine setting module, finely tunes corresponding tuning network for the TV signal intensity information based on receiving.
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| CN102111169A (en) | 2011-03-14 | 2011-06-29 | 中兴通讯股份有限公司 | Double-mode mobile terminal |
| CN102695012A (en) * | 2012-06-20 | 2012-09-26 | 青岛海信移动通信技术股份有限公司 | Method for improving signal receiving performance of mobile television and mobile terminal |
| CN104078752B (en) * | 2014-06-23 | 2017-05-03 | 芜湖航飞科技股份有限公司 | Vehicle-mounted short-wave communication antenna |
| CN105633553B (en) * | 2015-12-25 | 2018-11-06 | 宇龙计算机通信科技(深圳)有限公司 | A kind of antenna system, mobile terminal and antenna tuning control system |
| CN105977614B (en) * | 2016-05-30 | 2020-02-07 | 北京小米移动软件有限公司 | Communication antenna, control method and device of communication antenna and terminal |
| CN106025545B (en) * | 2016-06-29 | 2018-09-04 | 广东欧珀移动通信有限公司 | Antenna assembly and terminal device |
| CN106025575A (en) * | 2016-07-01 | 2016-10-12 | 天津七二通信广播有限公司 | Antenna system applied to UV frequency band of communication terminal |
| CN106961021A (en) * | 2017-03-14 | 2017-07-18 | 珠海市魅族科技有限公司 | The intelligent selecting method of intelligent selection module and terminal antenna frequency range |
| CN112187377A (en) * | 2020-09-02 | 2021-01-05 | 珠海格力电器股份有限公司 | Antenna frequency modulation system, frequency modulation method, device and medium |
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| CN101646030A (en) * | 2009-05-15 | 2010-02-10 | 上海闻泰电子科技有限公司 | Circuit designing method for extending antenna bandwidth of analogue television |
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