CN102420625B - Matching circuit, matching circuit network and signal transmit-receive device - Google Patents
Matching circuit, matching circuit network and signal transmit-receive device Download PDFInfo
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- CN102420625B CN102420625B CN201110376547.8A CN201110376547A CN102420625B CN 102420625 B CN102420625 B CN 102420625B CN 201110376547 A CN201110376547 A CN 201110376547A CN 102420625 B CN102420625 B CN 102420625B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
Abstract
The invention discloses a matching circuit, which comprises an isolating module, a filtering module and a matching module. The filtering module is connected between the isolating module and the matching module; the isolating module is used for isolating signals outside an assigned frequency and sending signals at the assigned frequency; the filtering module is used for filtering away the signals outside the assigned frequency; and the matching module is used for matching the signals at the assigned frequency. Correspondingly, the invention also discloses a matching circuit network and a signal transmit-receive device. The matching circuit, the matching circuit network and the signal transmit-receive device disclosed by the invention not only reduces complexity of the signal transmit-receive device, decreases cost and saves hardware resources, but also solves a problem that multiple paths of signals cannot be received at the same time in the case of using antenna switches and the like in the prior art and improves signal receiving efficiency.
Description
Technical field
The present invention relates to signal reception technique, relate in particular to a kind of match circuit, match circuit network and signal receiving/transmission device.
Background technology
Multiband aerial is very common in Antenna Design.Be usually expressed as, an Antenna Design is gone out to different minor matters, thereby realize the multiband reception of single antenna.Yet in the ever-increasing situation of hand aircraft antenna quantity, multi-antenna technology will cause a large amount of area consumptions.In fact, along with the development of antenna match technology, same antenna, when match parameter is different, is also the reception demand that can meet different frequency range.Therefore, a single-band antenna coordinates different antenna match schemes, and the multiband that just can realize antenna receives.
At present, prior art is that the multiband of realizing single antenna receives by using duplexer to be switched to different match circuits.Shown in Fig. 1 is the signal receiving/transmission device of prior art single-band antenna when realizing double frequency and receiving, in this signal receiving/transmission device, comprise duplexer, low frequency transmission branch road 1 and high frequency and transmitted branch road 2, wherein, low frequency transmits in branch road 1 and comprises match circuit 1, low noise amplifier, match circuit 2 and transmission circuit 1, high frequency transmits in branch road 2 and comprises match circuit 2, filter, match circuit 4 and transmission circuit 2, wherein, the circuit structure of match circuit 1 as shown in Figure 2, consists of series inductance and shunt capacitance.The circuit structure of match circuit 2 as shown in Figure 3, consists of series capacitance and shunt inductance.In above-mentioned signal receiving/transmission device, utilize duplexer to switch on different receiving branchs, realize the switching of receive path, reach the object of utilizing same single-band antenna to carry out multiband reception.
Above-mentioned signal receiving/transmission device comprises duplexer, accordingly, using the equipment of described signal receiving/transmission device (as notebook computer, portable flat panel computer, hand held mobile phone, with the media player of radio function etc.) in, also need correspondingly to increase to the circuit of duplexer and Logic control module, so, just increased the complexity of whole signal receiving/transmission device, and the implementation procedure to the transmitting-receiving of single antenna multiband.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of match circuit, match circuit network and signal receiving/transmission device, to solve the high problem of existing signal receiving/transmission device complexity.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of match circuit, described match circuit comprises: isolation module, filtration module and matching module, and described filtration module is connected between described isolation module and matching module, wherein, isolation module, for isolating assigned frequency signal in addition, transmits the signal of assigned frequency; Filtration module, for filtering out described assigned frequency signal in addition; Matching module, for carrying out matching treatment to the signal of described assigned frequency.
The present invention also provides a kind of match circuit network, and described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road, wherein,
Described high frequency transmits branch road and comprises one or two high frequency match circuit, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal;
Described low frequency transmits branch road and comprises one or two low frequency match circuit, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal.
In such scheme, described the first isolation module comprises the first electric capacity, and described the first filtration module comprises the first series resonant tank, and described the first matching module comprises described the 3rd electric capacity and the 3rd inductance;
Described the 3rd electric capacity is connected with the 3rd inductance, and described the 3rd inductance ground connection, described first series resonant tank one end ground connection, one end of described the first electric capacity connects respectively one end of the other end and the 3rd electric capacity of described the first series resonant tank, the other end is as one end of described high frequency match circuit, and the tie point between described the 3rd electric capacity and the 3rd inductance is as the other end of described high frequency match circuit.
In such scheme, described the first isolation module also comprises the first inductance, described the first inductance and described the first Capacitance parallel connection;
Wherein, between described the first inductance and the first electric capacity, meet formula:
wherein L represents the inductance value of the first inductance, and C represents the capacitance of the first electric capacity, and F represents that the appointment of described high-frequency signal suppresses the centre frequency of frequency range, lower than the band connection frequency of described the first isolation module.
In such scheme, described the first series resonant tank comprises the second inductance and the second electric capacity being connected in series, and wherein, meets formula between described the second inductance and the second electric capacity:
wherein L represents the inductance value of the second inductance, and C represents the capacitance of the second electric capacity, and F represents that the appointment of described high-frequency signal suppresses the centre frequency of frequency range, lower than the band connection frequency of described the first isolation module.
In such scheme, described the second isolation module comprises the 4th inductance, and the second filtration module comprises series resonant tank, and the second matching module comprises described the 6th inductance and the 5th electric capacity;
Described the 6th inductance and the 5th capacitances in series, and described the 5th capacity earth, described second series resonant tank one end ground connection, one end of described the 4th inductance connects respectively one end of the other end and described the 6th inductance of described the second series resonant tank, the other end is as one end of described low frequency match circuit, and the tie point between described the 6th inductance and the 5th electric capacity is as the other end of described low frequency match circuit.
In such scheme, described the second series resonant tank comprises the 5th inductance and the 4th electric capacity being connected in series, and wherein, meets formula between described the 5th inductance and the 4th electric capacity:
wherein L represents the inductance value of the 5th inductance, and C represents the capacitance of the 4th electric capacity, and F represents that the appointment of described low frequency signal suppresses the centre frequency of frequency range, higher than the band connection frequency of described the second isolation module.
In such scheme, when described high frequency transfer circuit comprises two high frequency match circuits, between the first matching module of described two high frequency match circuits, be connected in series; When described low frequency transfer circuit comprises two low frequency match circuits, between the second matching module of described two low frequency match circuits, be connected in series.
In such scheme, described low frequency transmits branch road and also comprises: low noise amplifier, and described low noise amplifier is connected on the second matching module of a described low frequency match circuit, or between the second matching module of described two low frequency match circuits.
In such scheme, described low noise amplifier is worked when needs receive low frequency signal, when not needing to receive low frequency signal, does not work.
In such scheme, described high frequency transmits branch road and also comprises: filter, and described filter is connected on the first matching module of a described high frequency match circuit, or between the first matching module of described two high frequency match circuits.
The present invention also provides a kind of signal receiving/transmission device, described signal receiving/transmission device comprises: antenna, match circuit network, the first transmission circuit and the second transmission circuit, wherein, described match circuit network transmits low frequency signal between described antenna and the first transmission circuit, and high-frequency signal is transmitted between described antenna and the second transmission circuit;
Described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road; Wherein,
Described high frequency transmits branch road and comprises a high frequency match circuit, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal;
Described low frequency transmits branch road and comprises a low frequency match circuit, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal.
The present invention also provides a kind of signal receiving/transmission device, described signal receiving/transmission device comprises: antenna, at least one match circuit network, transmission circuit, wherein, described at least one match circuit network is divided into high-frequency signal and low frequency signal by the signal of a plurality of frequencies, and between described antenna and transmission circuit, transmits respectively;
Described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road; Wherein,
Described high frequency transmits branch road and comprises two high frequency match circuits that are connected in series, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal;
Described low frequency transmits branch road and comprises two low frequency match circuits that are connected in series, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal.
In such scheme, a described match circuit network is for being divided into high-frequency signal or low frequency signal by the signal of two frequencies; And, between described antenna and transmission circuit, transmit respectively, or at self, connect, the high frequency described in other in match circuit network transmits branch road or low frequency and transmits on branch road and transmit.
Match circuit provided by the invention, match circuit network and signal receiving/transmission device, by increasing in match circuit for isolating assigned frequency with the isolation module of external signal, and for filtering out assigned frequency with the filtration module of external signal, make match circuit self possess the function of isolation signals, so, making does not need to use duplexer in corresponding signal receiving/transmission device, just can reach the object that same single-band antenna carries out multiband reception, not only can reduce the complexity of signal receiving/transmission device, reduce costs, save hardware resource, and owing to not needing to carry out the respective switch switching flow of duplexer in signal receiving course, thereby solved in prior art, in the situation of use duplexer etc., multiple signals can not be realized the problem simultaneously receiving, and improved signal receiving efficiency.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of signal receiving/transmission device in prior art;
Fig. 2 is the composition structural representation that signal receiving/transmission device medium and low frequency shown in Fig. 1 transmits branch road;
Fig. 3 is the composition structural representation that signal receiving/transmission device medium-high frequency shown in Fig. 1 transmits branch road;
Fig. 4 is the composition structural representation of a kind of match circuit of the present invention;
Fig. 5 is a kind of electrical block diagram of match circuit network medium-high frequency match circuit of the present invention;
Fig. 6 is the another kind of electrical block diagram of match circuit network medium-high frequency match circuit of the present invention;
Fig. 7 is a kind of electrical block diagram of match circuit network medium and low frequency match circuit of the present invention;
Fig. 8 is the composition structural representation of a kind of signal receiving/transmission device in the embodiment of the present invention one;
Fig. 9 is the composition structural representation of another kind of signal receiving/transmission device in the embodiment of the present invention one;
Figure 10 is the composition structural representation of a kind of signal receiving/transmission device in the embodiment of the present invention two;
Figure 11 is the composition structural representation of another kind of signal receiving/transmission device in the embodiment of the present invention two;
Figure 12 is the composition structural representation of signal receiving/transmission device in the embodiment of the present invention three;
Figure 13 is the part WCDMA system configuration schematic diagram of application signal receiving/transmission device of the present invention.
Embodiment
Basic thought of the present invention is: by the match circuit to antenna, improve, make its match circuit there is the function of isolation high-frequency signal or low frequency signal, for for mating the match circuit of low frequency signal, can directly high-frequency signal be isolated out, only low frequency signal is transferred to transmission circuit, for for mating the match circuit of high-frequency signal, can directly low frequency signal be isolated out, only high-frequency signal is transferred to transmission circuit.So, in signal receiving/transmission device, do not need to use duplexer, just can realize the multiband transmitting-receiving of single antenna, thereby guaranteeing, under the prerequisite of the normal work of signal receiving/transmission device, to have reduced the complexity of signal receiving/transmission device.
A kind of match circuit of the present invention, as shown in Figure 4, described match circuit comprises: isolation module, filtration module and matching module, described filtering module is connected between described isolation module and matching module, wherein, isolation module, for isolating assigned frequency signal in addition, transmits the signal of assigned frequency; Filtration module, for filtering out the signal beyond described assigned frequency, with strengthen match circuit to assigned frequency the isolation effect with external signal; Matching module, for carrying out matching treatment to the signal of described assigned frequency.
Here, the signal of described assigned frequency can be the high-frequency signal of assigned frequency, or the low frequency signal of assigned frequency.Here, described high-frequency signal is relative concept with low frequency signal, the signal of two kinds of different frequency ranges receiving and dispatching for need, and the signal of high band is described high-frequency signal, the signal of low-frequency range is described low frequency signal.For example, for Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) in system, need W850 frequency band signals and the W2100 frequency band signals of reception, W850 frequency band signals is above-mentioned low frequency signal, and W2100 frequency band signals is above-mentioned high-frequency signal.
In addition, the present invention also provides a kind of match circuit network, described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road, wherein, described high frequency transmits branch road and comprises one or two high frequency match circuit, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal; Described low frequency transmits branch road and comprises one or two low frequency match circuit, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal.
Described the first isolation module comprises the first electric capacity, and described the first filtration module comprises the first series resonant tank, and described the first matching module comprises described the 3rd electric capacity and the 3rd inductance; Described the 3rd electric capacity is connected with the 3rd inductance, and described the 3rd inductance ground connection, described first series resonant tank one end ground connection, one end of described the first electric capacity connects respectively one end of the other end and the 3rd electric capacity of described the first series resonant tank, the other end is as a signal transmission end of described high frequency match circuit, and the tie point between described the 3rd electric capacity and the 3rd inductance is as another signal transmission end of described high frequency match circuit.Described the first series resonant tank comprises an inductance and the electric capacity being connected in series.
Particularly, two kinds of circuit structures that described high frequency match circuit can be following:
The first, as shown in Figure 5, comprise: the first capacitor C 1, the second inductance L 2, the second capacitor C 2, the 3rd capacitor C 3, with the 3rd inductance L 3, wherein, the second inductance L 2 is connected with the second capacitor C 2, and described the second capacitor C 2 ground connection, described the 3rd capacitor C 3 is connected with the 3rd inductance L 3, and described the 3rd inductance L 3 ground connection, one end of described the first capacitor C 1 is as one end of described the first high frequency match circuit, the other end connects respectively described the second inductance L 2 and the 3rd capacitor C 3, tie point between described the 3rd capacitor C 3 and the 3rd inductance L 3 is as the other end of described the first high frequency match circuit.Wherein, the first isolation module comprises that described the first capacitor C 1, the first filtration module comprises that described the second inductance L 2 and the second capacitor C 2, the first matching modules comprise described the 3rd capacitor C 3 and the 3rd inductance L 3.
The second, as shown in Figure 6, comprise: the first inductance L 1, the first capacitor C 1, the second inductance L 2, the second capacitor C 2, the 3rd capacitor C 3, with the 3rd inductance L 3, wherein, the second inductance L 2 is connected with the second capacitor C 2, and described the second capacitor C 2 ground connection, described the 3rd capacitor C 3 is connected with the 3rd inductance L 3, and described the 3rd inductance L 3 ground connection, described the first inductance L 1 is in parallel with described the first capacitor C 1, one end of described the first capacitor C 1 is as one end of described the first high frequency match circuit, the other end connects respectively described the second inductance L 2 and the 3rd capacitor C 3, tie point between described the 3rd capacitor C 3 and the 3rd inductance L 3 is as the other end of described the first high frequency match circuit.Wherein, the first isolation module comprises that described the first inductance L 1 and the first capacitor C 1, the first filtration module comprise that described the second inductance L 2 and the second capacitor C 2, the first matching modules comprise described the 3rd capacitor C 3 and the 3rd inductance L 3.
Wherein, described the second isolation module comprises the 4th inductance, and the second filtration module comprises series resonant tank, and the second matching module comprises described the 6th inductance and the 5th electric capacity; Described the 6th inductance and the 5th capacitances in series, and described the 5th capacity earth, described second series resonant tank one end ground connection, one end of described the 4th inductance connects respectively one end of the other end and described the 6th inductance of described the second series resonant tank, the other end is as one end of described low frequency match circuit, and the tie point between described the 6th inductance and the 5th electric capacity is as the other end of described low frequency match circuit.
Particularly, the circuit structure of described low frequency match circuit as shown in Figure 7, comprise: the 4th inductance L 4, the 5th inductance L 5, the 4th capacitor C 4, the 6th inductance L 6, the 5th capacitor C 5, wherein, described the 5th inductance L 5 is connected with the 4th capacitor C 4, and described the second capacitor C 4 ground connection, described the 6th inductance L 6 is connected with the 5th capacitor C 5, and described the 5th capacitor C 5 ground connection, one end of described the 4th inductance L 4 is as one end of described the first low frequency match circuit, the other end connects respectively described the 5th inductance L 5 and the 6th inductance L 6, tie point between described the 6th inductance L 6 and the 5th capacitor C 5 is as the other end of described the first low frequency match circuit.Wherein, the second isolation module comprises that described the 4th inductance L 4, the second filtration modules comprise that described the 5th inductance L 5 and the 4th capacitor C 4, the second matching modules comprise described the 6th inductance L 6 and the 5th capacitor C 5.
Wherein, the first capacitor C 1 is compared with the signal of low-frequency range, to make it not affect the work of high band for isolation, and reduces the 5th inductance L 5 and the impact of the 4th capacitor C 4 on the second inductance L 2 and the second capacitor C 2; The 4th inductance L 4 is for isolating the signal of higher frequency band, to make it not affect the work of low-frequency range, and reduces the second inductance L 2 and the impact of the second capacitor C 2 on the 5th inductance L 5 and the 4th capacitor C 4; The 3rd capacitor C 3 and the 3rd inductance L 3, the 5th capacitor C 5 and the 6th inductance L 6 are mainly used in realizing tuning to signal, carry out matching treatment; The second inductance L 2 and the second capacitor C 2, for filtering low-band signal, form high pass filter together with the first capacitor C 1; The 5th inductance L 5 and the 4th capacitor C 4, for filtering high frequency band signal, form low pass filter together with the 4th inductance L 4.
Wherein, between the first inductance L 1 and the first capacitor C 1, between the second inductance L 2 and the second capacitor C 2 and all meet formula between the 5th inductance L 5 and the 4th capacitor C 4:
wherein L represents the inductance value of corresponding inductance, and C represents the capacitance of corresponding capacitance, and F represents that the appointment of corresponding signal suppresses the centre frequency of frequency range.Particularly, for the first inductance L 1 and the first capacitor C 1 and the second inductance L 2 and the second capacitor C 2,, F represents that the appointment of described high-frequency signal suppresses the centre frequency of frequency range, lower than the band connection frequency of described the first isolation module.For the 5th inductance L 5 and the 4th capacitor C 4, the appointment that F is described low frequency signal suppresses the centre frequency of frequency range, higher than the band connection frequency of described the second isolation module.
In practical application, for the high frequency match circuit shown in Fig. 6, owing to having increased by the first inductance L 1, thereby there is more high performance isolation effect compared to the first high frequency match circuit, and also can make low frequency bandwidth narrow down.Therefore, the second high frequency match circuit is applicable to the slightly narrow situation of low frequency bandwidth, for example, can be that low frequency relative bandwidth is in the situation below 40%.
Wherein, when described high frequency transfer circuit comprises two high frequency match circuits, between the first matching module of described two high frequency match circuits, be connected in series; When described low frequency transfer circuit comprises two low frequency match circuits, between the second matching module of described two low frequency match circuits, be connected in series.
Here, described low frequency transmits branch road and can also comprise: low noise amplifier, and described low noise amplifier is connected on the second matching module of a described low frequency match circuit, or between the second matching module of described two low frequency match circuits.Described low noise amplifier is worked when needs receive low frequency signal, when not needing to receive low frequency signal, does not work.
Here, described high frequency transmits branch road and can also comprise: filter, and described filter is connected on the first matching module of a described high frequency match circuit, or between the first matching module of described two high frequency match circuits.
For example, application for simulated television, receive the signal that frequency range is greater than 160MHz, and frequency range is while being less than the signal of 120MHz, two high frequency match circuits that high frequency transmits on branch road all adopt the circuit structure shown in Fig. 5, two low frequency match circuits that low frequency transmits on branch road all adopt the circuit structure shown in Fig. 7, , its design parameter can be: C1=22pF, C2=56pF, C3=22pF, C4=27pF, the design parameter of C5 can be adjusted by concrete condition, in this example, C5 is vacancy, L2=56nH, L3 design parameter can be adjusted by concrete condition, in this example, L3 is vacancy, L4=68nH, L5=22nH, L6=68nH.
In addition, the present invention also provides a kind of signal receiving/transmission device, described signal receiving/transmission device comprises: antenna, match circuit network, the first transmission circuit and the second transmission circuit, wherein, described match circuit network transmits low frequency signal between described antenna and the first transmission circuit, and high-frequency signal is transmitted between described antenna and the second transmission circuit;
Described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road; Wherein, described high frequency transmits branch road and comprises a high frequency match circuit, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, for isolating low frequency signal, transmits high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal; Described low frequency transmits branch road and comprises a low frequency match circuit, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal.
The present invention also provides another kind of signal receiving/transmission device, described signal receiving/transmission device comprises: antenna, at least one match circuit network, transmission circuit, wherein, described at least one match circuit network is divided into high-frequency signal and low frequency signal by the signal of a plurality of frequencies, and between described antenna and transmission circuit, transmits respectively;
Described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road; Wherein, described high frequency transmits branch road and comprises two high frequency match circuits that are connected in series, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, for isolating low frequency signal, transmits high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal; Described low frequency transmits branch road and comprises two low frequency match circuits that are connected in series, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal.
Wherein, a described match circuit network is for being divided into high-frequency signal or low frequency signal by the signal of two frequencies; And, between described antenna and transmission circuit, transmit respectively, or transmit on high-frequency transmission branch road that connect at self, described in other in match circuit network or low frequency transmission branch road.
Embodiment mono-
Signal receiving/transmission device in the present embodiment as shown in Figure 8, mainly comprise: antenna, high frequency transmit branch road, low frequency transmits branch road, the first transmission circuit and the second transmission circuit, wherein, high frequency transmits branch road and low frequency transmits branch circuit parallel connection between described antenna and the first transmission circuit and the second transmission circuit, described high frequency transmits the input of branch road and the input of low frequency transmission branch road connects described antenna, the output that described high frequency transmits branch road connects described the second transmission circuit, and the output that low frequency transmits branch road connects described the first transmission circuit.
Wherein, high frequency transmits branch road and comprises the first high frequency match circuit, and low frequency transmits branch road and comprises the first low frequency match circuit.Described the second transmission circuit transmits for receiving and dispatching via described high frequency the high-frequency signal that branch road transmits, and described the first transmission circuit transmits for receiving and dispatching via described low frequency the low frequency signal that branch road transmits.
Here, described the first high frequency match circuit is identical with above-mentioned high frequency match circuit structure, wherein, the first high frequency match circuit is usingd the input of described the first isolation module as self input, usings the output of described the first matching module as self output.
Described the first low frequency match circuit is identical with above-mentioned low frequency match circuit structure, and wherein, the first low frequency match circuit is usingd the input of described the second isolation module as self input, usings the output of described the second matching module as self output.
In signal receiving/transmission device in the present embodiment, can also transmit and in branch road, increase low noise amplifier at low frequency, can also transmit branch road at high frequency and increase filter, increase low noise amplifier and filter signal receiving/transmission device afterwards as shown in Figure 9, wherein, the input of low noise amplifier connects the output of the first low frequency match circuit, output connects the input of the first transmission circuit, described low noise amplifier is worked when needs receive low frequency signal, when not needing to receive low frequency signal, does not work.Particularly, described low noise amplifier is controlled by baseband chip, and this baseband chip, when needs receive low frequency signal, for described low noise amplifier switches on power, makes described low noise amplifier work; This baseband chip, when not needing to receive low frequency signal, is described low noise amplifier powered-down, and described low noise amplifier is not worked.So, by the opening and closing of low noise amplifier, can strengthen low frequency and transmit the isolation of branch road to high-frequency signal, make high frequency reception and low frequency reception can work the time-division unaffected.
If high frequency match circuit is not good to the isolation effect of low frequency, or while needing better isolation effect, can also transmit and on branch road, increase filter at high frequency, the input of described filter is connected to the output of described the first high frequency match circuit, output is connected to the input of described the second transmission circuit, for filtering interference signals and prevent that self-oscillation from appearring in low noise amplifier.And, by increasing filter, can strengthen high frequency and transmit the isolation of branch road to low frequency signal, high frequency reception and low frequency reception can be worked unaffected the time-division, while working at the same time, can reduce impact each other.
Particularly, when the signal of telecommunication of antenna reception low frequency, low noise amplifier work, the signal of telecommunication transmits branch road via low frequency and arrives the first transmission circuit.When the signal of telecommunication of antenna reception high frequency, low noise amplifier is not worked, and the signal of telecommunication transmits branch road via high frequency and arrives the second transmission circuit.
In the present embodiment, by increasing low noise amplifier and transmit on branch road and increase filter at high frequency on low frequency transmission branch road, can be so that while receiving high-frequency signal, and the isolation between low frequency signal is greater than 20dB, can reach the performance that duplexer can reach completely.
The present embodiment is applied to the situation of double-receiver.
Embodiment bis-
Signal receiving/transmission device in the present embodiment as shown in figure 10, mainly comprise: antenna, high frequency transmit branch road, low frequency transmits branch road and transmission circuit, wherein, high frequency transmits branch road and low frequency transmits branch circuit parallel connection between described antenna and described transmission circuit, described high frequency transmits the input of branch road and the input of low frequency transmission branch road connects described antenna, and output connects described transmission circuit.High frequency transmits branch road and comprises the first high frequency match circuit and the second high frequency match circuit, and low frequency transmits branch road and comprises the first low frequency match circuit and the second low frequency match circuit, and transmission circuit is used for receiving high-frequency signal and low frequency signal.
Wherein, the first high frequency match circuit is connected with the second high frequency match circuit, and the first high frequency match circuit connects described antenna, and the second high frequency match circuit connects described transmission circuit; The first low frequency match circuit is connected with the second low frequency match circuit, and the first low frequency match circuit connects described antenna, and the second low frequency match circuit connects described transmission circuit.
Here, the composition structure of described the first high frequency match circuit and the second high frequency match circuit, identical with above described high frequency match circuit structure, repeat no more, wherein, the first high frequency match circuit is usingd the input of described the first isolation module as self input, using the output of described the first matching module as self output, the second high frequency match circuit is usingd the input of described the first matching module as self input, usings the output of described the first isolation module as self output.
The composition structure of described the first low frequency match circuit and the second low frequency match circuit, identical with above described high frequency match circuit structure, repeat no more, wherein, the first low frequency match circuit is usingd the input of described the second isolation module as self input, using the output of described the second matching module as self output, the second low frequency match circuit is usingd the input of described the second matching module as self input, usings the output of described the second isolation module as self output.
In like manner, the signal receiving/transmission device in the present embodiment also can transmit in branch road and increase low noise amplifier at low frequency, and at high frequency, transmitting branch road increases filter, increases low noise amplifier and filter signal receiving/transmission device afterwards as shown in figure 11.Described low noise amplifier is connected between the first low frequency match circuit and the second low frequency match circuit, and described filter is connected between the first high frequency match circuit and the second high frequency match circuit.Particularly, the input of described filter connects described the first high frequency match circuit, and output connects described the second high frequency match circuit.The input of described low noise amplifier connects described the first low frequency match circuit, and output connects described the second low frequency match circuit.
Wherein, described low noise amplifier is worked when needs receive low frequency signal, when not needing to receive low frequency signal, does not work, and concrete implementation procedure is identical with embodiment mono-, repeats no more.
Embodiment tri-
In practical application, the high frequency transmission branch road of signal receiving/transmission device described in embodiment bis-and low frequency transmission branch road can also be segmented respectively again, the signal receiving of antenna is mated to transmission by four branch roads, reach the effect that single-band antenna is matched respectively to four frequency ranges, improved the bandwidth of antenna.
Signal receiving/transmission device in the present embodiment as shown in figure 12, comprise three match circuit networks, wherein, one is one-level match circuit network, other two is second degree matches circuit network, low frequency in one-level match circuit network transmits on branch road and comprises the first low frequency match circuit and the second low frequency match circuit, and its high frequency transmits on branch road and comprises the first high frequency match circuit and the second high frequency match circuit; Two second degree matches circuit networks are connected on the high frequency transmission branch road and low frequency transmission branch road of described one-level match circuit network.
Wherein, the high frequency that is connected to described one-level match circuit network transmits in the second degree matches circuit network on branch road, its low frequency transmits branch road and comprises the 5th low frequency match circuit and the 6th low frequency match circuit, for the high frequency of described one-level match circuit network being transmitted to the signal of two frequency ranges of high-frequency signal on branch road, be subdivided into again high-frequency signal and low frequency signal, and by self high frequency, transmit branch road and low frequency respectively and transmit the high frequency of branch road in described one-level match circuit network and transmit branch road and transmit; Its high frequency transmits branch road and comprises the 5th high frequency match circuit and the 6th high frequency match circuit;
The high frequency that is connected to described one-level match circuit network transmits in the second degree matches circuit network on branch road, for the low frequency of described one-level match circuit network being transmitted to the signal of two frequency ranges of high-frequency signal on branch road, be subdivided into again high-frequency signal and low frequency signal, and by self high frequency, transmit branch road and low frequency respectively and transmit the low frequency of branch road in described one-level match circuit network and transmit branch road and transmit; Its low frequency transmits branch road and comprises the 3rd low frequency match circuit and the 4th low frequency match circuit, and its high frequency transmits branch road and comprises third high match circuit and the 4th high frequency match circuit frequently.
Particularly, the structure of each high frequency match circuit is identical with above described high frequency match circuit structure, repeat no more, wherein, the first high frequency match circuit, third high is match circuit frequently, the 5th high frequency match circuit is all usingd the input of described the first isolation module as self input, using the output of described the first matching module as self output, the second high frequency match circuit, the 4th high frequency match circuit, the 6th high frequency match circuit is usingd the input of described the first matching module as self input, using the output of described the first isolation module as self output.
The structure of each low frequency match circuit is identical with above described low frequency match circuit structure, repeat no more, wherein, the first low frequency match circuit, the 3rd low frequency match circuit, the 5th low frequency match circuit is all usingd the input of described the second isolation module as self input, using the output of described the second matching module as self output, the second low frequency match circuit, the 4th low frequency match circuit, the 6th low frequency match circuit is usingd the input of described the second matching module as self input, using the output of described the second isolation module as self output.
In the present embodiment, the structure of described signal processing apparatus is similar to embodiment bis-, and difference is that described high frequency transmits branch road and low frequency transmission branch road receives respectively the signal of two designated frequency band by adding the mode of branch road.For example, if need to receive the signal of GSM1800/1900, tetra-frequency ranges of GSM850/900, can specify GSM1800/1900 signal is high-frequency signal, GSM850/900 signal is low frequency signal, by high frequency, transmit branch road and receive GSM1800/1900 signal, low frequency transmits branch road and receives GSM850/900 frequency band signals.Particularly, while receiving GSM1800/1900 signal in high frequency transmission branch road, via the second high frequency, receive sub-branch road and receive GSM1900 signal, via the second low frequency, receive sub-branch road and receive GSM1800 signal, while receiving GSM850/900 signal in low frequency transmission branch road, via the first high frequency, receive sub-branch road and receive GSM900 signal, via the first low frequency, receive sub-branch road and receive GSM850 signal.
In the present embodiment, low frequency transmits branch road and each low frequency and receives on sub-branch road and all can set up low noise amplifier, and this low noise amplifier is arranged on branch road between two low frequency match circuits.Accordingly, high frequency transmits branch road and each high frequency and receives on sub-branch road and also can set up filter, and this filter is arranged on branch road between two high frequency match circuits, repeats no more.
In like manner, if need to receive the signal of six frequency ranges, can also in a second degree matches circuit network therein, match circuit network be set again, if need to receive the signal of eight frequency ranges, can also be respectively match circuit network be set again in two second degree matches circuit networks therein, the like, specific implementation process is similar to the above process, repeats no more.
Embodiment tetra-
The present embodiment illustrates should being used as of signal receiving/transmission device provided by the present invention.
As shown in figure 13, for thering is the WCDMA system block diagram of GSM850/900/1800/1900 frequency range and W850/1900/2100 frequency range, in Figure 13, apply the signal receiving/transmission device in above-described embodiment one, distinguished W850 frequency range and W2100 frequency range.
Particularly, the shared branch road of W850/2100 is connected respectively to high frequency match circuit and low frequency match circuit, wherein, after the radiating portion generation transmitting by rf chip of W2100, the power amplifier (PA, Power Amplifier) that is sent to W2100 amplifies, by the signal process W2100 duplexer (comprising above-mentioned filter) after amplifying, arrive high frequency match circuit, through duplexer, be sent to antenna transmission to space.The reception signal of W2100, through duplexer, arrives high frequency match circuit, arrives the W2100 transmission circuit of rf chip via duplexer (comprising above-mentioned filter).After the radiating portion generation transmitting by rf chip of W850, the power amplifier that is sent to W850 amplifies, signal after amplifying, through W850 duplexer (comprising above-mentioned filter), is arrived to low frequency match circuit, through duplexer, be sent to antenna transmission to space.The reception signal of W850, through duplexer, arrives low frequency match circuit, arrives the W850 transmission circuit of rf chip via duplexer (comprising above-mentioned filter).So, need to after the shared branch road of W850/2100, duplexer be set, just can receive W2100 frequency band signals and W850 frequency band signals.
Particularly, in the present embodiment, low frequency match circuit adopts the circuit structure shown in Fig. 7, high frequency match circuit can adopt the circuit structure shown in Fig. 6, and its design parameter can be: C1=4.7pF, C2=4.7pF, C3=5.6pF, C4=2.2pF, the design parameter of C5 is adjusted by circuit conditions, in this example, C5 is vacancy, L1=6.8nH, L2=6.8nH, the design parameter of L3 is adjusted by circuit conditions, and in this example, C5 is vacancy, L4=6.8nH, L5=2.2nH, L6=6.8nH.
Through measuring, while receiving by the way W2100 signal and W850 signal, its isolation is better than 20dB.The receive loss of W850 frequency range is 0.5-0.6dB, and the receive loss of W2100 frequency range is 0.22-0.3dB, visible, applies signal receiving/transmission device of the present invention and not only can save duplexer, reduces system complexity, and can reach high-isolation and low-loss.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (12)
1. a match circuit, is characterized in that, described match circuit comprises: isolation module, filtration module and matching module, and described filtration module is connected between described isolation module and matching module,
When being used to specify the high-frequency signal of frequency, wherein, isolation module, comprises the first electric capacity; Filtration module, comprises the second inductance and the second electric capacity; Matching module, comprises the 3rd electric capacity and the 3rd inductance; Wherein, described the second inductance and the second capacitances in series, and the second capacity earth, described the 3rd electric capacity is connected with the 3rd inductance, and the 3rd inductance ground connection, one end of the first electric capacity is as one end of match circuit, and the other end connects respectively the second inductance and the 3rd electric capacity, and the tie point between the 3rd electric capacity and the 3rd inductance is as the other end of match circuit;
When being used to specify the low frequency signal of frequency, wherein, isolation module, comprises the 4th inductance; Filtration module, comprises the 5th inductance and the 4th electric capacity; Matching module, comprises the 6th inductance and the 5th electric capacity; Wherein, described the 5th inductance and the 4th capacitances in series, and the 4th capacity earth, described the 6th inductance and the 5th capacitances in series, and the 5th capacity earth, one end of the 4th inductance is as one end of match circuit, and the other end connects respectively the 5th inductance and the 6th inductance, and the tie point between the 6th inductance and the 5th electric capacity is as the other end of match circuit.
2. a match circuit network, is characterized in that, described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road, wherein,
Described high frequency transmits branch road and comprises one or two high frequency match circuit, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal;
Wherein, described the first isolation module comprises the first electric capacity, described the first filtration module comprises the first series resonant tank, and described the first series resonant tank comprises the second inductance and the second electric capacity being connected in series, and described the first matching module comprises the 3rd electric capacity and the 3rd inductance; Described the 3rd electric capacity is connected with the 3rd inductance, and described the 3rd inductance ground connection, described first series resonant tank one end ground connection, one end of described the first electric capacity connects respectively one end of the other end and the 3rd electric capacity of described the first series resonant tank, the other end is as one end of described high frequency match circuit, and the tie point between described the 3rd electric capacity and the 3rd inductance is as the other end of described high frequency match circuit;
Described low frequency transmits branch road and comprises one or two low frequency match circuit, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal;
Wherein, described the second isolation module comprises the 4th inductance, and the second filtration module comprises the second series resonant tank, and described the second series resonant tank comprises the 5th inductance and the 4th electric capacity being connected in series, and the second matching module comprises the 6th inductance and the 5th electric capacity; Described the 6th inductance and the 5th capacitances in series, and described the 5th capacity earth, described second series resonant tank one end ground connection, one end of described the 4th inductance connects respectively one end of the other end and described the 6th inductance of described the second series resonant tank, the other end is as one end of described low frequency match circuit, and the tie point between described the 6th inductance and the 5th electric capacity is as the other end of described low frequency match circuit.
3. match circuit network according to claim 2, is characterized in that, described the first isolation module also comprises the first inductance, described the first inductance and described the first Capacitance parallel connection;
Wherein, between described the first inductance and the first electric capacity, meet formula:
wherein L represents the inductance value of the first inductance, and C represents the capacitance of the first electric capacity, and F represents that the appointment of described high-frequency signal suppresses the centre frequency of frequency range, lower than the band connection frequency of described the first isolation module.
4. match circuit network according to claim 2, is characterized in that, described the first series resonant tank comprises the second inductance and the second electric capacity being connected in series, and wherein, meets formula between described the second inductance and the second electric capacity:
wherein L represents the inductance value of the second inductance, and C represents the capacitance of the second electric capacity, and F represents that the appointment of described high-frequency signal suppresses the centre frequency of frequency range, lower than the band connection frequency of described the first isolation module.
5. match circuit network according to claim 2, is characterized in that, described the second series resonant tank comprises the 5th inductance and the 4th electric capacity being connected in series, and wherein, meets formula between described the 5th inductance and the 4th electric capacity:
wherein L represents the inductance value of the 5th inductance, and C represents the capacitance of the 4th electric capacity, and F represents that the appointment of described low frequency signal suppresses the centre frequency of frequency range, higher than the band connection frequency of described the second isolation module.
6. according to the match circuit network described in claim 2 to 5 any one, it is characterized in that,
When described high frequency transfer circuit comprises two high frequency match circuits, between the first matching module of described two high frequency match circuits, be connected in series;
When described low frequency transfer circuit comprises two low frequency match circuits, between the second matching module of described two low frequency match circuits, be connected in series.
7. according to the match circuit network described in claim 2 to 5 any one, it is characterized in that, described low frequency transmits branch road and also comprises: low noise amplifier, described low noise amplifier is connected on the second matching module of a described low frequency match circuit, or between the second matching module of described two low frequency match circuits.
8. match circuit network according to claim 7, is characterized in that, described low noise amplifier is worked when needs receive low frequency signal, when not needing to receive low frequency signal, does not work.
9. according to the match circuit network described in claim 2 to 5 any one, it is characterized in that, described high frequency transmits branch road and also comprises: filter, described filter is connected on the first matching module of a described high frequency match circuit, or between the first matching module of described two high frequency match circuits.
10. a signal receiving/transmission device, it is characterized in that, described signal receiving/transmission device comprises: antenna, match circuit network, the first transmission circuit and the second transmission circuit, wherein, described match circuit network transmits low frequency signal between described antenna and the first transmission circuit, and high-frequency signal is transmitted between described antenna and the second transmission circuit;
Described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road; Wherein,
Described high frequency transmits branch road and comprises a high frequency match circuit, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal;
Wherein, described the first isolation module comprises the first electric capacity, described the first filtration module comprises the first series resonant tank, and described the first series resonant tank comprises the second inductance and the second electric capacity being connected in series, and described the first matching module comprises the 3rd electric capacity and the 3rd inductance; Described the 3rd electric capacity is connected with the 3rd inductance, and described the 3rd inductance ground connection, described first series resonant tank one end ground connection, one end of described the first electric capacity connects respectively one end of the other end and the 3rd electric capacity of described the first series resonant tank, the other end is as one end of described high frequency match circuit, and the tie point between described the 3rd electric capacity and the 3rd inductance is as the other end of described high frequency match circuit;
Described low frequency transmits branch road and comprises a low frequency match circuit, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal;
Wherein, described the second isolation module comprises the 4th inductance, and the second filtration module comprises the second series resonant tank, and described the second series resonant tank comprises the 5th inductance and the 4th electric capacity being connected in series, and the second matching module comprises the 6th inductance and the 5th electric capacity; Described the 6th inductance and the 5th capacitances in series, and described the 5th capacity earth, described second series resonant tank one end ground connection, one end of described the 4th inductance connects respectively one end of the other end and described the 6th inductance of described the second series resonant tank, the other end is as one end of described low frequency match circuit, and the tie point between described the 6th inductance and the 5th electric capacity is as the other end of described low frequency match circuit.
11. 1 kinds of signal receiving/transmission devices, it is characterized in that, described signal receiving/transmission device comprises: antenna, at least one match circuit network, transmission circuit, wherein, described at least one match circuit network is divided into high-frequency signal and low frequency signal by the signal of a plurality of frequencies, and between described antenna and transmission circuit, transmits respectively;
Described match circuit network comprises: high frequency transmits branch road and low frequency transmits branch road; Wherein,
Described high frequency transmits branch road and comprises two high frequency match circuits that are connected in series, described high frequency match circuit comprises: the first isolation module, the first filtration module and the first matching module, described the first filtration module is connected between described the first isolation module and described the first matching module, wherein, the first isolation module, be used for isolating low frequency signal, transmit high-frequency signal; The first filtration module, for filtering out described high-frequency signal other signals in addition; The first matching module, for carrying out matching treatment to described high-frequency signal;
Wherein, described the first isolation module comprises the first electric capacity, described the first filtration module comprises the first series resonant tank, and described the first series resonant tank comprises the second inductance and the second electric capacity being connected in series, and described the first matching module comprises the 3rd electric capacity and the 3rd inductance; Described the 3rd electric capacity is connected with the 3rd inductance, and described the 3rd inductance ground connection, described first series resonant tank one end ground connection, one end of described the first electric capacity connects respectively one end of the other end and the 3rd electric capacity of described the first series resonant tank, the other end is as one end of described high frequency match circuit, and the tie point between described the 3rd electric capacity and the 3rd inductance is as the other end of described high frequency match circuit;
Described low frequency transmits branch road and comprises two low frequency match circuits that are connected in series, this low frequency match circuit comprises: the second isolation module, the second filtration module and the second matching module, described the second filtration module is connected between described the second isolation module and described the second matching module, wherein, the second isolation module, be used for isolating high-frequency signal, transmit low frequency signal; The second filtration module, for filtering out described low frequency signal other signals in addition; The second matching module, for carrying out matching treatment to described low frequency signal;
Wherein, described the second isolation module comprises the 4th inductance, and the second filtration module comprises the second series resonant tank, and described the second series resonant tank comprises the 5th inductance and the 4th electric capacity being connected in series, and the second matching module comprises the 6th inductance and the 5th electric capacity; Described the 6th inductance and the 5th capacitances in series, and described the 5th capacity earth, described second series resonant tank one end ground connection, one end of described the 4th inductance connects respectively one end of the other end and described the 6th inductance of described the second series resonant tank, the other end is as one end of described low frequency match circuit, and the tie point between described the 6th inductance and the 5th electric capacity is as the other end of described low frequency match circuit.
12. signal receiving/transmission devices according to claim 11, is characterized in that, a described match circuit network is for being divided into high-frequency signal or low frequency signal by the signal of two frequencies;
And, between described antenna and transmission circuit, transmit respectively, or at self, connect, the high frequency described in other in match circuit network transmits branch road or low frequency and transmits on branch road and transmit.
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| CN201110376547.8A CN102420625B (en) | 2011-11-23 | 2011-11-23 | Matching circuit, matching circuit network and signal transmit-receive device |
| PCT/CN2012/070765 WO2013075404A1 (en) | 2011-11-23 | 2012-01-30 | Matching circuit, matching circuit network, and signal transceiver device |
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