CN1525773A - Handset and method accomplishing antenna matching with different matching circuits in different frequency bands - Google Patents
Handset and method accomplishing antenna matching with different matching circuits in different frequency bands Download PDFInfo
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- CN1525773A CN1525773A CNA031063276A CN03106327A CN1525773A CN 1525773 A CN1525773 A CN 1525773A CN A031063276 A CNA031063276 A CN A031063276A CN 03106327 A CN03106327 A CN 03106327A CN 1525773 A CN1525773 A CN 1525773A
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Abstract
The invention provides a relative device for mobile phone antenna match and the method. The mobile phone sets an antenna, one or several radio frequency signal circuit which use different frequency band, and frequency band duplexer, in order to connects the radio frequency signal in different frequency band to the antenna. There sets correspondent match circuit in each radio frequency signal circuit, the antenna characters of receiving and transmitting signal in each radio frequency signal circuit aren't affected from each other, and they can adjust to the optimized performance by themselves.
Description
Technical field
The present invention provides a kind of mobile phone and adjusts the method for antenna for mobile phone characteristic, especially finger is a kind of is provided with antenna-matching circuit individually in the radiofrequency signal circuit of different frequency bands, so that mobile phone and correlation technique that the antenna performance of different frequency bands radiofrequency signal circuit transceiver signal can independently be adjusted.
Background technology
In radio communication is the highly developed modernized information-intensive society of system, and people can be by convenient light and handy mobile phone or other radio communication device, anywhere or anytime access network resource, exchange message, share one's experience, increase knowledge.In order to increase the convenience in the use, modern mobile phone also has the function of double frequency or multifrequency mostly, allow the user can access the wireless communication network resource of different frequency bands, the extend information access capability.How to promote the function of dual-band mobile phone, also become the emphasis of present information industry research and development.As known to persons skilled in the art, in the wireless communication network of different frequency bands, even use the same antenna of same mobile phone, concerning the different electromagnetic wave of frequency, the situation of its antenna performance (the especially antenna performance near field), diffraction, scattering, characteristic impedance and Circuit Matching also can be different fully, how effectively the access facility of different frequency bands wireless communication network is integrated in same mobile phone and can not interferes with each other, also just become the important topic of mobile phone science and technology research and development.
Please refer to figure one and figure two.Figure one and figure two are respectively the external view and the function block schematic diagram of existing dual-band mobile phone 10.Be provided with baseband circuit 18, radio circuit 40, antenna 20 in the mobile phone 10, and input unit 12, display 14, microphone 36, loud speaker 38.Be provided with processor 16 in the baseband circuit 18, be used for the running of master control mobile phone 10.Input unit 12 can be button or other contactor control device, is used for receiving the control command of user's input, and transfers to the processor 16 in the baseband circuit 18, allows processor 16 can control the operation of mobile phone 10 according to controlling of user; And processor 16 also can be on display 14 be shown as graphic picture with the mode of operation of mobile phone 10.Display 14 can be a LCD, also can be the contact panel that is integrated into input unit 12.Microphone 36 is used for receiving the sound wave that the user speaks and produces, and produces corresponding electronic form audio signal 42, exports it to baseband circuit 18.38 energy of loud speaker are converted to sound wave with the voice signal 43 of electronic form, allow the user can hear corresponding sound.
As dual-band mobile phone, the radio circuit 40 in the mobile phone 10 is provided with two radiofrequency signal circuit 22A, 22B, is used for the cordless communication network of access different frequency bands respectively.For instance, radiofrequency signal circuit 22A can be CDMA (the Code Division Multiple Access) communication that is used for carrying out PCS (Personal CommunicationServices), and its frequency band range is greatly in 1,900 megahertzes (MHz); Another radiofrequency signal circuit 22B then can be the communication that is used for carrying out AMPS (Advanced Mobile Phone System), and its frequency band range is greatly about about 900 megahertzes.Be respectively equipped with power adjusting circuit 28A, 22B among radiofrequency signal circuit 22A, the 22B; Isolator 30A, 30B; Duplexer (duplexer) 32A, 32B and receiving circuit 49A, 49B.In existing mobile phone 10, radiofrequency signal circuit 22A, 22B can be electrically connected to match circuit 26 by common channel duplexer (diplexer) 24, are electrically connected to antenna 20 again.When the user will use a certain frequency band in the dual-band mobile phone 10 to carry out radio communication, will begin operation to radiofrequency signal circuit that should frequency band, mobile phone 10 also can stop supplies electric power be given the radio circuit of another frequency band simultaneously, makes its shut-down operation.
The operational scenario that mobile phone 10 carries out radio communication can be described below.For instance, the user will carry out radio communication with the pairing frequency band of radiofrequency signal circuit 22A, and radiofrequency signal circuit 22B will shut-down operation.User's one's voice in speech can be received, be converted to the audio signal 42 of electronics by microphone 36, transfers to baseband circuit 18.Necessary signal processing be encoded, modulates or be carried out to baseband circuit 18 can with audio signal 42 according to the demand of this band radio communication, to produce the signal of communication 44A corresponding to this frequency band, transfers to power adjusting circuit 28A again.Power adjusting circuit 28A can adjust the watt level of signal of communication 44A, and the adjusted signal of communication 46A of power will transfer to duplexer 32A through isolator 30A.Wherein isolator (isolator) 30A can guarantee that power is to transfer to duplexer 32A by power adjusting circuit 28A, and can significantly be decayed by isolator 30A by duplexer 32A passback, the power that reflexes to power adjusting circuit 28A, prevent that the power breakdown power that returns from adjusting circuit 28A.The signal of communication 46A that transfers to duplexer 32A can continue channel duplexer 24 and transfer to match circuit 26, transfers to antenna 20 again, by antenna 20 it is launched in wireless mode.So, mobile phone 10 users' information just can be sent to cordless communication network and suffered.In like manner, the radio signal that is reached mobile phone 10 by cordless communication network also can be received by antenna 20, transfers in the radio circuit 40 through match circuit 26, channel duplexer 24.Wherein the function class of channel duplexer 24 is similar to filter, and the signal that can will meet different frequency bands radiofrequency signal circuit leaches, and transfers to corresponding radiofrequency signal circuit.For instance, if being respectively the frequency bands with 1,900 megahertzes, 900 megahertzes, radiofrequency signal circuit 22A, 22B carry out radio communication, channel duplexer 24 is when receiving antenna 20 through signal that match circuit 26 transmits, signal in 1,900 mhz band will be leached, and transfer among the radiofrequency signal circuit 22A; Signal in 900 mhz band then can be filtered off, transfer to radiofrequency signal circuit 22B.The signal (just receiving letter signal 49A) that transfers among the radiofrequency signal circuit 22A can transfer to receiving circuit 34A through duplexer (duplexer) 32A, transmit back baseband circuit 18 again, undertaken demodulation that should frequency band, separate and compile or signal processing by baseband circuit 18, to form corresponding voice signal 43, transfer to loud speaker 38 again, by loud speaker 38 voice signal 43 is converted to sound wave and plays back.Like this, the user of mobile phone 10 also just can receive information that long-range another cellie is transmitted.Wherein, in radiofrequency signal circuit 22A, the function of duplexer 32A also is similar to filter; Continue to use aforesaid example, carry out radio communication though radiofrequency signal circuit 22A is a frequency band with 1,900 megahertzes, be emitted to the signal of cordless communication network through antenna 20, its frequency band range reality is between the 1850-1910 megahertz; And cordless communication network passback, through the signal that antenna 20 receives, its frequency band range reality is between the 1930-1990 megahertz.So duplexer 32A can leach the signal that belongs in the signal in the 1930-1990 mhz band scope into receiving letter signal 49A, transfers to receiving circuit 34A.
According to identical principle, when the user will carry out radio communication with the corresponding frequency band of radiofrequency signal circuit 22B, radiofrequency signal circuit 22A will shut-down operation.User's voice can be sent to the cordless communication network of corresponding frequency band again through microphone 36, baseband circuit 18, radiofrequency signal circuit 22B power adjusting circuit 28B, isolator 30B, duplexer 32B and channel duplexer 24, match circuit 26 in wireless mode by antenna 20.The radio signal that is back to antenna 20 by corresponding band radio communication network then can be back to baseband circuit 18 through match circuit 26, channel duplexer 24, duplexer 32B and receiving circuit 34B, is played back by microphone 38 at last.Continue aforesaid example, radiofrequency signal circuit 22B can be the radiofrequency signal circuit of corresponding 900 mhz band, and through the signal that antenna 20 sends, its frequency band range reality is about the 824-849 megahertz, and the signal that antenna 20 receives, frequency band range reality is between the 864-894 megahertz.According to the difference on the frequency band, duplexer 32B just can leach the signal that antenna 20 receives to receiving letter signal 49B and be back to receiving circuit 34B.
In the radio circuit 40 of existing mobile phone 10, match circuit 26 generally all is made up of some passive circuit element elements (similarly being resistance, electric capacity or inductance); When signal process match circuit 26, the pass of phase place is to be changed between voltage of signals, electric current, and the amplitude size also may be attenuated.When the signal that is fed into antenna 20 had the change of phase place on voltage, the electric current, the antenna performance that antenna 20 transmits also can change thereupon; In like manner, because the impedance of match circuit 26 restriction, when the component parameters (similarly being resistance value, capacitance or inductance value) of circuit element in the match circuit 26 changed, the antenna performance that antenna 20 receives the letter signal also can change thereupon.Can find out that by figure two and foregoing description in existing mobile phone 10, no matter be to carry out signal transmitting and receiving at that frequency band, signal all can pass through match circuit 26; In other words, the equiva lent impedance of match circuit 26 can influence the antenna performance of mobile phone 10 all band signal transmitting-receivings.In case change the component parameters of circuit element in the match circuit 26, the antenna performance of all band signal transmitting-receivings all can change thereupon.So, the puzzlement that will cause antenna match to design.As previously mentioned, because the employed electromagnetic wave of different frequency bands radio communication can have different frequencies and wavelength, also different to the requirement of antenna performance.For instance, when the signal of the corresponding frequency band of antenna 20 emitting radio frequency signal circuit 22A, the gain of its antenna performance may be excessive and cause the power of antenna 20 emission wireless signals strong excessively.But the antenna performance gain that if the component parameters that will change match circuit 26 circuit elements reduces radiofrequency signal circuit 22A when posting a letter, because the signal of radiofrequency signal circuit 22B can pass through match circuit 26 equally, it is low that the antenna performance of radiofrequency signal circuit 22B was gained, or exceed a certain default value.The low effect that can influence radio communication that gained, the too high power of antenna transmitted radio signal that then can make that gains is strong excessively, may bring secret worry on the health to the user.In like manner, in existing mobile phone 10, even when carrying out the radio communication of identical frequency band, signal transmitting and receiving also all can pass through match circuit 26 equally; If the antenna performance of antenna 20 in the time of will adjusting the signal emission, the antenna performance of antenna 20 also can be affected when signal received so.For instance, antenna performance gain when as if the component parameters that will change match circuit 26 antenna 20 being posted a letter is turned down to lower the misgivings on user's health, even receiving the antenna performance gain of letter signal, antenna 20 can not influence user's health, the antenna performance gain that antenna 20 is collected mail also can reduce together, causes the quality of radio communication low.In other words, because match circuit 26 has been controlled the antenna performance of all frequency band transceiver signals in the existing mobile phone 10, so can't take into account the individual demand of each band radio transceiver communication letter information, often only can between each band signal transmitting-receiving, carry out the compromise on the performance, not only increase the difficulty in the mobile phones design, more can influence the usefulness that mobile phone carries out multi-band wireless communication, also be difficult to take into account the user the too high doubt of mobile phone launching electromagnetic wave power.
Please continue with reference to figure three.Figure three is the function block schematic diagram of another existing dual-band mobile phone 50.Mobile phone 50 can be a typical GSM (Global System for Mobilecommunications)/DCS dual-band mobile phone, to carry out radio communication in GSM900 megahertz, two kinds of wireless communication frequency band of DCS1800 megahertz; For the purpose of simplifying the description, under the situation that does not hinder technical discussion, label, title identical functions square or element among label, title and the figure two among the figure three have identical functions in mobile phone 50.It similarly is the match circuit 26 that also has the antenna 20 of microphone 36, baseband circuit 18, processor 16, input unit 12, display 14, the transmitting/receiving wireless signal of telecommunication in the mobile phone 50 and be used for mating antenna 20.Radio circuit 45 in the mobile phone 50 is also distinguished the transmitting-receiving of corresponding different frequency bands radiofrequency signals with two radiofrequency signal circuit 52A, 52B, and also is respectively equipped with power adjusting circuit 28A, 28B and receiving circuit 34A, 34B in the two radiofrequency signal circuit.The function class of commutation circuit 56 is similar to the channel duplexer 24 among the figure two, is used for the signal of antenna 20 is transferred to radiofrequency signal circuit 52A, 52B respectively according to the difference of signal band; And the function of commutation circuit 54A, 54B (switch) among each radiofrequency signal circuit 52A, 52B also is similar to duplexer 32A, 32B among the figure two, signal by antenna 20 receptions, just can after transferring to the radiofrequency signal circuit, further transfer to corresponding receiving circuit.Though the duplexer in the approximate mobile phone 10 of function, commutation circuit 56,54A, 54B are the functions that realizes the signal shunting in the mode that circuit switches.When mobile phone 50 will be posted a letter, also be sound wave to be converted to electronic signal, through baseband circuit 18 codings, modulation, signal processing by microphone 36; If will carry out radio communication, will launch by antenna 20 again through power adjusting circuit 28B, commutation circuit 54B, commutation circuit 56, match circuit 26 through the signal after baseband circuit 18 processing with the frequency band of radiofrequency signal circuit 52B correspondence.Relatively, reach the signal of mobile phone 50, then can transfer to receiving circuit 34B, baseband circuit 18, play back by loud speaker 38 at last through antenna 20, match circuit 26, commutation circuit 56, commutation circuit 54B by corresponding band radio communication network.By finding out among the figure three, even in existing mobile phone 50, different frequency bands transceiver signal still can be through same match circuit 26, so the antenna performance of each frequency band transceiver signal still can not be adjusted independently, its shortcoming is still identical with the shortcoming of mobile phone 10 among the figure two.
In the prior art, the radiofrequency signal circuit of different frequency bands receiving and transmitting signal all mates antenna performance through same antenna match circuit, in case the component parameters of circuit element in the change match circuit, the antenna performance of different frequency bands receiving and transmitting signal all can change, make the coupling of antenna performance between the demand of different frequency bands transmitting-receiving, to compromise, can't adapt to different demand between each frequency band transmitting-receiving.
Summary of the invention
Therefore, main purpose of the present invention is to provide a kind of mobile phone and the correlation technique that can independently adjust each frequency band transceiver signal antenna characteristic, to overcome the shortcoming of prior art.
The present invention discloses a kind of mobile phone, and it includes baseband circuit, is used for producing signal of communication; Match circuit is electrically connected in this baseband circuit, is used for changing phase place or size between this signal of communication electric current, voltage, to produce corresponding transmitting; Antenna is used for this is transmitted and launches in wireless mode, and receives the signal that transmits with wireless system, to produce corresponding received signal; Receiving circuit is used for this received signal is transferred to this baseband circuit; And duplexer, be electrically connected between this match circuit and this antenna, being used for this is transmitted transfers to this antenna, and this received signal is transferred to this receiving circuit; Wherein this match circuit can be under the situation that does not change phase place between this current receive signal, voltage or size, change phase place or size between this signal of communication electric current, voltage, make antenna performance when this antenna is launched this and transmitted with wireless system, the antenna performance when not being subjected to this antenna with the wireless system received signal influences.
In the present invention, then in each radiofrequency signal circuit, different match circuits is set individually, can adjusts the antenna performance of each frequency band receiving and transmitting signal independently, and can not disturb the characteristic of other frequency band receiving and transmitting signal for receiving and transmitting signal.So, just can be under the situation that does not influence other frequency band receiving and transmitting signal characteristic, adjust each frequency band receipts/signalling characteristic, make the coupling of antenna more can meet the demand of different frequency bands signal transmitting and receiving, take into account radio communication quality and user reducing the requirement of mobile phone transmitting power.
Description of drawings:
Fig. 1 is the profile schematic diagram of existing mobile phone.
Fig. 2 is a cell-phone function block schematic diagram among Fig. 1.
Fig. 3 is the schematic diagram of another existing cell-phone function square.
Fig. 4 to Fig. 6 is respectively the schematic diagram of three different embodiment function squares of the present invention.
Embodiment
Please refer to figure four.Figure four is the function block schematic diagram of the dual-band mobile phone 60 of the embodiment of the invention.Be similar to the mobile phone 10 among the figure one, mobile phone 60 also can be the CDMA/AMPS dual-band mobile phone; Also be provided with baseband circuit 68, radio circuit 90, antenna 70, microphone 86, loud speaker 88 and input unit 62, display 64 in the mobile phone 60.Be provided with processor 66 in the baseband circuit 68, be used for the operation of master control mobile phone 60, the user can be by input unit 62 input control orders to processor 66, and is demonstrated the state of mobile phone 60 operations by display (similarly being LCD) 64.Be similar to the configuration of mobile phone 10, also be provided with two radiofrequency signal circuit 72A, 72B in the mobile phone 60 of the present invention, correspond respectively to 60 two different wireless communication frequency band of dual-band mobile phone; For instance, radiofrequency signal circuit 72A can be used for carrying out cdma wireless communication under the PCS, and radiofrequency signal circuit 72B can be used for carrying out the AMPS radio communication.In radiofrequency signal circuit 72A, 72B, power adjusting circuit 78A, 78B, isolator 80A, 80B and receiving circuit 84A, 84B respectively just and power adjusting circuit 28A, 28B among the figure two, isolator 30A, 30B and receiving circuit 34A, 34B have identical functions.And the function of channel duplexer 74, duplexer 82A, 82B among the figure four, the function of channel duplexer 24, duplexer 32A, 32B is identical just and among the figure two respectively, is used for the signal of different frequency bands transmitting-receiving is branched to the processing square of correspondence.Similarly be channel duplexer 74, its input port 75A directly is electrically connected in antenna 70; Through its two output port 75A, 75B, the signal that antenna 70 is received just can transfer to radiofrequency signal circuit 72A, 72B respectively according to frequency bandwidth characteristics.
The present invention and prior art are most important one of not to exist together, and is that promptly the present invention is on the approach of different frequency bands receiving and transmitting signal, is respectively arranged with independently match circuit, with the antenna performance of indivedual adjustment different frequency bands receiving and transmitting signals; And channel duplexer 74 also just can directly be electrically connected to antenna 70.Shown in figure four, in radiofrequency signal circuit 72A, on the approach of signal transmitting and receiving, be respectively equipped with match circuit 77A, 76A; And also on the approach of signal transmitting and receiving, be respectively equipped with match circuit 77B, 76B among the radiofrequency signal circuit 72B.Mobile phone 60 carries out the situation of radio communication, can be described below.For instance, when the user will carry out radio communication with the corresponding frequency band of radiofrequency signal circuit 72A, user's sound can receive and be converted to audio signal 92 by microphone 86, and after baseband circuit 68 carries out corresponding codes, modulation, signal processing (or the exchange between simulation, digital signal), produce corresponding signal of communication 94A, transfer to radiofrequency signal circuit 72A.At the same time, then shut-down operation of radiofrequency signal circuit 72B.In radiofrequency signal circuit 72A, power adjusting circuit 78A can adjust the power of signal of communication 94A and form signal of communication 96A, and transfers to match circuit 76A through isolator 80A.Match circuit 76A can adjust the phase place (or power of the signal of communication 96A that decays again) between signal of communication 96A electric current, voltage, forms the corresponding 98A that transmits.Transmit 98A through duplexer 82A, channel duplexer 74, just can it be sent to cordless communication network in wireless mode by antenna 70.
In like manner, the radio signal that is reached mobile phone 60 by cordless communication network can receive through antenna 70, the shunting of channel duplexer 74, duplexer 82A and form received signal 99A among the radiofrequency signal circuit 72A, and transfer to match circuit 77A.Match circuit 77A also can change the phase difference between received signal 99A electric current, voltage, form corresponding received signal 99B, be back to baseband circuit 68 through receiving circuit 84A again, carry out corresponding decoding, demodulation or signal processing by baseband circuit 68, form corresponding voice signal 93A at last, be converted to sound wave by loud speaker 88 again and play back.The user just can hear information that remote handset transmits through cordless communication network like this.Because match circuit 77A can change the phase relation between electric current, voltage among the received signal 99A, be equivalent to change the input impedance of antenna 70 on channel duplexer 74, duplexer 82A, this approach of match circuit 77A, also just can have changed the antenna performance of antenna 70 received signal in radiofrequency signal circuit 72A in the equivalence.
According to identical principle, when mobile phone 60 will carry out radio communication with the corresponding frequency band of radiofrequency signal circuit 72B, also be by antenna 70 signal to be launched with wireless system again through microphone 86, baseband circuit 68, power adjusting circuit 78B, isolator 80B, match circuit 76B, duplexer 82B and channel duplexer 74.By the signal that antenna 70 receives, then channel duplexer 74, duplexer 82B, match circuit 77B, receiving circuit 84B are back to baseband circuit 68, play back through loud speaker 88 again.
By foregoing description as can be known, the present invention is respectively equipped with other antenna-matching circuit on the approach of different frequency bands receiving and transmitting signal, makes the antenna performance of different frequency bands receiving and transmitting signal independently to adjust under non-interfering situation, reaches preferable effect.For instance, if radiofrequency signal circuit 72A is too high through the antenna performance gain that antenna transmits, just can adjust the component parameters of each circuit element among the match circuit 76A, make signal through power adjusting circuit 78A, isolator 76A, when match circuit 76A transfers to antenna 70, the gain of its antenna performance can moderately decay.Because match circuit 76A is arranged between duplexer 82A and the power adjusting circuit 78A, equiva lent impedance on the approach of antenna 70 received signals (just transferring to the approach of receiving circuit 84A through duplexer 82A) can not be changed, and the gain of the antenna performance of antenna 70 received signals just can not be changed yet in the equivalence.So, antenna 70 both characteristics of sending and receiving signal just can independently without interfering with each other be adjusted, the on the one hand suitably characteristic gain that transmits of control antenna 70, reduce user's misgivings excessive to the electromagnetic wave transmitting power, the characteristic of antenna 70 received signals still can be kept necessarily on the one hand, guarantees the quality that signal receives in the radio communication.
Similarly, the present invention also can the independent without interfering with each other antenna performance of adjusting each band signal transmitting-receiving between different frequency bands.Shown in figure four, being used for the match circuit of matched signal dual-mode antenna characteristic in each frequency band all is arranged between channel duplexer 74 and the baseband circuit 68, even adjust the component parameters of match circuit in the single frequency band, can not influence the antenna performance of other band signal transmitting-receiving yet.For instance, change the antenna performance that radiofrequency signal circuit 72B transmits even adjust the component parameters of match circuit 76B, the antenna performance of radiofrequency signal circuit 72A receiving and transmitting signal (together with the antenna performance of received signal among the radiofrequency signal circuit 72B) can not change.So, just can adjust antenna performance independently according to the characteristic of each band radio communication, and needn't look like situation of the prior art, in case change the component parameters of match circuit, will change the antenna performance of each frequency band receiving and transmitting signal simultaneously, also will between the demand of different frequency bands radio communication, compromise.In addition, in the present invention's mobile phone 60, match circuit 76A, 76B are located between duplexer 82A, 82B and isolator 80A, the 80B respectively, because isolator can be isolated the power that is reached power adjusting circuit by match circuit, so when adjusting the component parameters of match circuit 76A, 76B, have bigger elasticity, the match circuit of needn't worrying can cause power reflection to power adjusting circuit and breakdown power is adjusted circuit.
Please refer to figure five.Figure five is the function block schematic diagram of the dual-band mobile phone 100 of another embodiment of the present invention.For the purpose of simplifying the description, do not hindering under the disclosed situation of the technology of the present invention, identical functions square among label, title and the figure four has identical functions among the figure five.Comprise the channel duplexer 74 in baseband circuit 68, microphone 86, loud speaker 88, antenna 70, the radio circuit 104, and duplexer 82A, 82B among radiofrequency signal circuit 102A, the 102B, receiving circuit 84A, 84B and isolator 80A, 80B, power adjusting circuit 78A, 78B or the like.Mobile phone 60 main differences among mobile phone 100 and the figure four are that only be respectively equipped with antenna-matching circuit 76A, 76B in the mobile phone 100 on the approach of each band transmission signal, the match circuit in each frequency band on the signal reception approach then can omit.As previously mentioned, the antenna performance gain that the antenna 70 of suitably decaying transmits can reduce the user to the unhealthful doubt of electromagnetic wave power, so can use match circuit 76A, 76B to adjust the antenna performance gain of signal emission in (suitably decay) two different frequency bands respectively; And when mobile phone when each frequency band receives letter signal, antenna 70 only can not have the seedbed and receives radio signals, and can't initiatively send electromagnetic wave, can not cause the misgivings on the health, so it is also little to adjust the needs of received signal characteristic, can omit its corresponding antenna-matching circuit.Also drawn the typical implementation method of match circuit among the figure five.For instance, match circuit 76A can change the difference between signal code, voltage with the network that electric capacity C1, C2 and inductance L 1 each circuit element are formed.Adjust the situation of antenna match, can adjust the capacitance of capacitor C 1, C2 or the inductance value of inductance L 1.Match circuit 76B among the figure five then forms with three three circuit element frameworks such as capacitor C 3, C4 and C5, and the capacitance that also can change each electric capacity mates the antenna performance that antenna 70 transmits for radiofrequency signal circuit 102B.In addition, except electric capacity, inductance, also can use resistance to come suitably deamplification in the match circuit.
Please refer to figure six.Figure six is the function block schematic diagram of the mobile phone 110 of another embodiment of the present invention.Be similar to the mobile phone 50 among the figure three, mobile phone 110 also is the GSM/DCS dual-band mobile phone.For the purpose of simplifying the description, do not hindering under the disclosed situation of the technology of the present invention, identical functions square among label, title and the figure five among the figure six, also having identical functions, similarly is antenna 70, baseband circuit 68, processor 66, microphone 86, loud speaker 88, input unit 62, display 64 or the like.In the radio circuit 134 of mobile phone 110, also be provided with two radiofrequency signal circuit 122A, 122B, respectively corresponding two different frequency bands; Be respectively equipped with commutation circuit 124A, 124B, power adjusting circuit 108A, 108B, receiving circuit 114A, 114B in the two radiofrequency signal circuit, its function is just identical with commutation circuit 54A, 54B, power adjusting circuit 28A, 28B, receiving circuit 34A, 34B among the figure three respectively; And the commutation circuit 126 among the figure six is also the same with commutation circuit 56 among the figure three, is used for the signal of antenna 70 is branched to two radiofrequency signal circuit 122A, 122B.Comparison diagram three and figure six, can understand mobile phone 110 of the present invention also is that independently antenna-matching circuit 116A, 116B and 117A, 117B are set respectively on the approach of different frequency bands transceiver signal, so that the antenna performance of each band signal transmitting-receiving can independently be adjusted, not disturb mutually.
In the prior art, only be provided with the single antenna match circuit, the approach of different frequency bands receiving and transmitting signal all can pass through this match circuit, makes the antenna performance of each frequency band receiving and transmitting signal influenced by this match circuit.When design, coupling antenna performance, in case adjust the antenna performance of this match circuit to cooperate a certain frequency band to collect mail or post a letter, the antenna performance of other frequency band receiving and transmitting signal will relatedly be affected, and can't take into account between different frequency bands the individual demand to the receiving and transmitting signal antenna performance.In comparison, in the present invention, then independently antenna-matching circuit can be set respectively on the approach of different frequency bands receiving and transmitting signal.When adjusting single match circuit, the characteristic that only has corresponding frequency band to collect mail or post a letter can be affected, the antenna performance of other frequency band receiving and transmitting signal all can remain unchanged, so when design, coupling antenna performance, just the antenna performance that can independently a certain frequency band be collected mail or be posted a letter also can not influence the antenna performance of other frequency band receiving and transmitting signal simultaneously according to being adjusted to preferable situation individually.This also makes the present invention be able to take into account the quality that radio communication is collected mail in each frequency band, and reduces the electromagnetic wave transmitting power to user's health affected.In the above-described embodiments, technology of the present invention is to apply to dual-band mobile phone, but spirit of the present invention also can be widely used in the single-frequency mobile phone, adjusts the collection of letters, the concrete antenna performance of posting a letter in the single frequency band; In addition, spirit of the present invention also can be promoted, to be used in the radio communication device of other kind.
The above only is the preferred embodiments of the present invention, according to identical change and the improvement that the present patent application claim is made, all should belong to the covering scope of patent of the present invention.
Claims (25)
1. mobile phone, it includes:
Baseband circuit is used for producing signal of communication;
Match circuit is electrically connected in this baseband circuit, is used for changing phase place or size between this signal of communication electric current, voltage, to produce corresponding transmitting;
Antenna is used for this is transmitted and launches in wireless mode, and receives the signal that transmits with wireless system, to produce corresponding received signal;
Receiving circuit is used for this received signal is transferred to this baseband circuit;
And
Duplexer is electrically connected between this match circuit and this antenna, is used for this is transmitted transferring to this antenna, and this received signal is transferred to this receiving circuit;
Wherein this match circuit can be under the situation that does not change phase place between this current receive signal, voltage or size, change phase place or size between this signal of communication electric current, voltage, make antenna performance when this antenna is launched this and transmitted with wireless system, the antenna performance when not being subjected to this antenna with the wireless system received signal influences.
2. mobile phone as claimed in claim 1, it also includes:
Microphone is electrically connected in this baseband circuit, is used for receiving sound wave and produces electronic audio signal; And this baseband circuit is that this audio signal is carried out signal processing to produce this signal of communication; And
Loud speaker is electrically connected in this baseband circuit; Wherein this baseband circuit also can carry out signal processing to produce corresponding voice signal to this received signal; And this loud speaker is to be used for this voice signal is converted to sound wave.
3. mobile phone as claimed in claim 1 wherein is provided with at least one circuit element in this match circuit, and wherein when the component parameters of this circuit element changed, the degree that phase place or size change between this signal of communication electric current, voltage also can change thereupon.
4. mobile phone as claimed in claim 3, wherein this circuit element is an electric capacity, this component parameters is the capacitance of this electric capacity.
5. mobile phone as claimed in claim 3, wherein this circuit element is an inductance, and this component parameters is the inductance value of this inductance.
6. mobile phone as claimed in claim 1, it also includes:
Power adjusting circuit is electrically connected between this baseband circuit and this match circuit, is used for adjusting the power of this signal of communication and adjusted signal of communication is transferred to this match circuit;
Isolator is electrically connected between this match circuit and this power adjusting circuit, be used for this signal of communication is transferred to this match circuit by this power adjusting circuit, and decay reflexes to the signal of power adjusting circuit by this match circuit, to protect this power adjusting circuit.
7. mobile phone as claimed in claim 1, it also includes second match circuit, be electrically connected in this duplexer and this receiving circuit, be used for changing phase place between electric current, voltage or size in this received signal, the antenna performance when adjusting this antenna with the wireless system received signal.
8. adjust the method that mobile phone signal is received and dispatched performance for one kind, wherein this mobile phone includes:
Baseband circuit is used for producing signal of communication;
Match circuit is electrically connected in this baseband circuit, is used for changing phase place or size between this signal of communication electric current, voltage, to produce corresponding transmitting; Wherein be provided with at least one circuit element in this match circuit; When the component parameters of this circuit element changed, the degree that phase place or size change between this signal of communication electric current, voltage also can change thereupon;
Antenna is used for this is transmitted and launches in wireless mode, and receives the signal that transmits with wireless system, to produce corresponding reception letter signal;
Receiving circuit is used for this received signal is transferred to this baseband circuit; And
Duplexer is electrically connected between this match circuit and this antenna, is used for this is transmitted transferring to this antenna, and this received signal is transferred to this receiving circuit;
And this method includes: the component parameters that changes circuit element in this match circuit, so that under the situation that does not change phase place between this current receive signal, voltage or size, change phase place or size between this signal of communication electric current, voltage, when making antenna performance change when this antenna is launched this and transmitted with wireless system, in fact the antenna performance of this antenna during with the wireless system received signal can keep remaining unchanged.
9. method as claimed in claim 8, wherein this circuit element is an electric capacity, this component parameters is the capacitance of this electric capacity.
10. method as claimed in claim 8, wherein this circuit element is an inductance, and this component parameters is the inductance value of this inductance.
11. method as claimed in claim 8, wherein this mobile phone also includes:
Power adjusting circuit is electrically connected between this baseband circuit and this match circuit, is used for adjusting the power of this signal of communication and adjusted signal of communication is transferred to this match circuit;
Isolator is electrically connected between this match circuit and this power adjusting circuit, be used for this signal of communication is transferred to this match circuit by this power adjusting circuit, and decay reflexes to the signal of power adjusting circuit by this match circuit, to protect this power adjusting circuit.
12. method as claimed in claim 8, wherein this mobile phone also includes second match circuit, be electrically connected in this duplexer and this receiving circuit, be used for changing phase place or size between electric current, voltage in this reception letter signal, the antenna performance when adjusting this antenna with the wireless system received signal.
13. method as claimed in claim 8, wherein this mobile phone also includes:
Microphone is electrically connected in this baseband circuit, is used for receiving sound wave and produces electronic audio signal; And this baseband circuit is that this audio signal is carried out signal processing to produce this signal of communication; And
Loud speaker is electrically connected in this baseband circuit; Wherein this baseband circuit also can carry out signal processing to produce corresponding voice signal to this received signal; And this loud speaker is to be used for this voice signal is converted to sound wave.
14. a mobile phone, it includes:
Baseband circuit is used for producing first signal of communication and second communication signal;
First power adjusting circuit is electrically connected in this baseband circuit, is used for adjusting the power of this first signal of communication;
First match circuit is electrically connected in this first power adjusting circuit, is used for receiving first signal of communication that is transmitted by this first power adjusting circuit, and changes phase place or size between this first signal of communication electric current, voltage, transmits to produce corresponding first;
Second power adjusting circuit is electrically connected in this baseband circuit, is used for adjusting the power of this second communication signal, and produces corresponding second and transmit;
Antenna is used for this first is transmitted and this second transmits and launch in wireless mode;
The channel duplexer is provided with output port and two input ports, and wherein two input ports are electrically connected in this first match circuit and this second power adjusting circuit respectively, and this output port is electrically connected in this antenna; This channel duplexer is to be used for this first is transmitted and this second transmits and transfer to this antenna;
Wherein this first match circuit can second transmit under the situation of phase place between electric current, voltage or size not changing this, change phase place or size between this first signal of communication electric current, voltage, make this antenna launch this first antenna performance when transmitting with wireless system, not being subjected to this antenna to launch this second antenna performance when transmitting with wireless system influences.
15. mobile phone as claimed in claim 14, it also includes second match circuit, be electrically connected between this second power adjusting circuit and this channel multiplexer, be used for first transmitting under the situation of phase place between electric current, voltage or size not changing this, change this second phase place or size that transmits between electric current, voltage, make this antenna launch this second antenna performance when transmitting with wireless system, not being subjected to this antenna to launch this first antenna performance when transmitting with wireless system influences.
16. mobile phone as claimed in claim 14; it also includes second isolator; be electrically connected between this second match circuit and this second power adjusting circuit; be used for this second is transmitted and transfer to this second match circuit by this second power adjusting circuit; and decay reflexes to the signal of second power adjusting circuit by this second match circuit, to protect this second power adjusting circuit.
17. mobile phone as claimed in claim 14; it also includes first isolator; be electrically connected between this first match circuit and this first power adjusting circuit; be used for this first signal of communication is transferred to this first match circuit by this first power adjusting circuit; and decay reflexes to the signal of first power adjusting circuit by this first match circuit, to protect this first power adjusting circuit.
18. mobile phone as claimed in claim 14, wherein this baseband circuit can make this first signal of communication take different frequency bands with this second communication signal.
19. mobile phone as claimed in claim 14, it also includes microphone, is electrically connected in this baseband circuit, is used for receiving sound wave to produce the corresponding audio signal; And this baseband circuit is that this audio signal is carried out signal processing to produce this first signal of communication and this second communication signal.
20. adjust the transmit method of emitting performance of machine difference for one kind, wherein this mobile phone includes:
Baseband circuit is used for producing first signal of communication and second communication signal;
First power adjusting circuit is electrically connected in this baseband circuit, is used for adjusting the power of this first signal of communication;
First match circuit is electrically connected in this first power adjusting circuit, is used for receiving first signal of communication that is transmitted by this first power adjusting circuit, and changes phase place or size between this first signal of communication electric current, voltage, transmits to produce corresponding first; Wherein be provided with at least one circuit element in this first match circuit; When the component parameters of this circuit element changed, the degree that phase place or size change between this first signal of communication electric current, voltage also can change thereupon;
Second power adjusting circuit is electrically connected in this baseband circuit, is used for adjusting the power of this second communication signal, and produces corresponding second and transmit;
Antenna is used for this first is transmitted and this second transmits and launch in wireless mode;
The channel duplexer is provided with output port and two input ports, and wherein two input ports are electrically connected in this first match circuit and this second power adjusting circuit respectively, and this output port is electrically connected in this antenna; This channel duplexer is to be used for this first is transmitted and this second transmits and transfer to this antenna;
And this method includes: the component parameters that changes circuit element in this first match circuit, this first match circuit second is transmitted under the situation of phase place between electric current, voltage or size not changing this, change phase place or size between this first signal of communication electric current, voltage, and making this antenna launch this first antenna performance when transmitting when changing with wireless system, this antenna is launched this second antenna performance when transmitting with wireless system and is in fact remained unchanged.
21. method as claimed in claim 20, wherein this mobile phone also includes second match circuit, be electrically connected between this second power adjusting circuit and this channel multiplexer, be used for first transmitting under the situation of phase place between electric current, voltage or size not changing this, change phase place or size between this second communication signal code, voltage, make this antenna launch this second antenna performance when transmitting with wireless system, not being subjected to this antenna to launch this first antenna performance when transmitting with wireless system influences.
22. method as claimed in claim 20; wherein this mobile phone also includes second isolator; be electrically connected between this second match circuit and this second power adjusting circuit; be used for this second communication signal is transferred to this second match circuit by this second power adjusting circuit; and decay reflexes to the signal of second power adjusting circuit by this second match circuit, to protect this second power adjusting circuit.
23. method as claimed in claim 20; wherein this mobile phone also includes first isolator; be electrically connected between this first match circuit and this first power adjusting circuit; be used for this first signal of communication is transferred to this first match circuit by this first power adjusting circuit; and decay reflexes to the signal of first power adjusting circuit by this first match circuit, to protect this first power adjusting circuit.
24. method as claimed in claim 20, wherein this baseband circuit can make this first signal of communication take different frequency bands with this second communication signal.
25. method as claimed in claim 20, wherein this mobile phone also includes microphone, is electrically connected in this baseband circuit, is used for receiving sound wave to produce the corresponding audio signal; And this baseband circuit is that this audio signal is carried out signal processing to produce this first signal of communication and this second communication signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031063276A CN1262133C (en) | 2003-02-24 | 2003-02-24 | Handset and method accomplishing antenna matching with different matching circuits in different frequency bands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031063276A CN1262133C (en) | 2003-02-24 | 2003-02-24 | Handset and method accomplishing antenna matching with different matching circuits in different frequency bands |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1525773A true CN1525773A (en) | 2004-09-01 |
| CN1262133C CN1262133C (en) | 2006-06-28 |
Family
ID=34282732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031063276A Expired - Fee Related CN1262133C (en) | 2003-02-24 | 2003-02-24 | Handset and method accomplishing antenna matching with different matching circuits in different frequency bands |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1262133C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431858A (en) * | 2015-02-02 | 2017-12-01 | 思睿逻辑国际半导体有限公司 | Loudspeaker is protected |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9716307B2 (en) | 2012-11-08 | 2017-07-25 | Htc Corporation | Mobile device and antenna structure |
-
2003
- 2003-02-24 CN CNB031063276A patent/CN1262133C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431858A (en) * | 2015-02-02 | 2017-12-01 | 思睿逻辑国际半导体有限公司 | Loudspeaker is protected |
| US10356521B2 (en) | 2015-02-02 | 2019-07-16 | Cirrus Logic, Inc. | Loudspeaker protection |
| US10356522B2 (en) | 2015-02-02 | 2019-07-16 | Cirrus Logic, Inc. | Loudspeaker protection |
| CN107431858B (en) * | 2015-02-02 | 2020-11-17 | 思睿逻辑国际半导体有限公司 | Loudspeaker protection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1262133C (en) | 2006-06-28 |
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