CN103454654A - Configurable matching network used at satellite navigation radio frequency front end - Google Patents
Configurable matching network used at satellite navigation radio frequency front end Download PDFInfo
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Abstract
The invention discloses a configurable matching network used at a satellite navigation radio frequency front end. The configurable matching network comprises a set of parallel switch capacitor arrays, a set of parallel switch inductance arrays, a set of series switch inductance arrays and a set of series switch capacitor arrays. The configurable matching network can be used for matching impedance of various satellite navigation radio frequency receiver ports, changes equivalent capacitance or equivalent inductance value of a corresponding array through regulating and controlling the switch capacitor arrays and the switch inductance arrays, and is further matched with input impedance. The invention provides a matching tuning technology combining digit and analog and a digital signal control simulation circuit to realize matching of impedance. The configurable matching network is used inside an integrated circuit of a satellite navigation radio frequency receiver, realizes matching of networks through sending orders, is good in performance, convenient and quick to operate, saves time and cost for a developing process, and has a good application prospect.
Description
Technical field
The present invention relates to the wireless communication electronics technical field, relate in particular to the impedance matching received for satellite navigation signals.
Background technology
The global navigation satellite system moved in the world mainly contains: the gps system of the U.S., Muscovite GLONASS system, the Galileo in Europe and Chinese big-dipper satellite positioning system.Other country is the autonomous satellite navigation and location system in positive formulation also.Thereby following Global Positioning System (GPS) will be multisystem the general layout of depositing.Along with the fast development of infotech and the continuous growth of information requirement, the user, in the urgent need to utilizing the resource of a plurality of satellite navigation systems, adopts the mode of information fusion, effectively improves positioning precision.So following, can support the receiver of two above satellite systems to become a kind of trend.
Receiver is responsible for the reception & disposal of radiofrequency signal, whether loaded impedance equate with the characteristic impedance of transmission line, i.e. whether impedance matching is related to the quality of signal quality, when impedance matching is suitable, transmission can not produce reflection, and all transmitting energies of guarantee are all absorbed by load like this.Therefore, suitable coupling can effectively be avoided the power attenuation of radiofrequency signal in transmitting procedure.The input impedance coupling of navigation radio-frequency front-end belongs to the arrowband coupling, its centre frequency can be similar to and represent whole bandwidth of operation, so a frequency can be only considered in impedance matching, now building a narrow-band impedance coupling needs two-stage or three grades of elements just can complete usually.
Impedance matching network both can also can be built by passive element by active component.Better than building with active component with passive element because passive element than active component more simply, more energy-conservation, and cost is lower.In passive element, because resistance is understood deamplification and introduces very important noise, usually be left out.Impedance matching network can build with one-level inductance and one-level electric capacity, therefore generally selects the topological structure of Γ shape, and the two-stage element is comprised of one-level series circuit unit and one-level parallel circuit unit respectively.
Traditional Γ shape matching network is divided into two schemes, as shown in Figure 3 a kind of, and the series circuit unit is selected as selecting as electric capacity inductance parallel circuit unit.Now due to the series circuit unit select for inductance element, so simultaneously more continuous for the regulating action that makes inductance, also consider the reception of navigation radiofrequency signal and process and need to carry out every straight reason, in the series circuit unit of Γ shape structure matching network, adopt the inductance series capacitance to replace the inductance of connecting in original network.Series capacitance not only plays every straight effect, can also make up the uncontinuity of inductance, is equivalent to the fine setting to inductance.Another kind of traditional scheme as shown in Figure 4, select as selecting as inductance electric capacity parallel circuit unit by the series circuit unit.In this scheme, generally can be because of the discontinuous continuity degree that affects regulating action of the value of inductance as the inductance of parallel circuit unit.But no matter be scheme one or scheme two, under different initial impedance, its applicability is defectiveness all.The characteristic of initial impedance is depended in the selection of two schemes.
When frequency is higher, the effect of impedance matching is more obvious.The input end of radio-frequency transmitter needs the good stable work of coupling ability.After process deviation during due to the IC flow and encapsulation, the parasitic parameter of bonding line is inconsistent, causes the chip input impedance of final encapsulation inconsistent.If when IC designs, fixing calibrating element is integrated into to chip internal, the simple value of each device of the matching network that calculating draws according to theory that relies on often can not reasonably match 50 ohm characteristic impedance of transmission line, when IC designs, is therefore not realize desirable impedance matching.So the input matching network of traditional radio-frequency transmitter can only be realized coupling by inductance, the electric capacity of external circuit, comprises the parameters such as distributed capacitance, lead-in inductance.
Traditional matching network is a fixing combination, the topological structure of Γ shape as shown in Figure 3 or Figure 4.Externally circuit design complete after in network the value of each several part device fix, although can revise by manual replacement components and parts the coupling combination of network when needs adjust, the inconvenience but Replacement gets up, and easily introduce artificially the factors such as nonideal parasitism, cause larger workload.Therefore traditional mode of being mated by external circuit is more mechanical, is tied very much, has increased the inconvenience in research and development, has strengthened the R&D cycle.
The fast development of wireless communication industry, promoted the direction evolution of radio-frequency (RF) front-end circuit design towards high-performance, low cost, high integration.Thereby, excellent as a kind of performance, integrated cost is low, impedance matching mode that can be integrated, convenient to operation, can realize that the tuning configurable matching network of coupling has absolute advantage by configuration-direct.
Summary of the invention
The present invention has done to optimize to traditional matching network and has improved, and merges the advantage of two kinds of traditional matching schemes, has solved the shortcoming of two kinds of traditional matching schemes, and a kind of configurable matching network is provided.
A kind of configurable matching network for the satellite navigation radio-frequency front-end, comprise parallel circuit unit and series circuit unit, it is characterized in that: described parallel circuit unit comprises paralleling switch capacitor array (11) and the paralleling switch electric inductance array (12) be connected in parallel; Described series circuit unit comprises tandem tap electric inductance array (13) and the tandem tap capacitor array (14) be connected in series successively; At first the radiofrequency signal that antenna is sent into enters paralleling switch capacitor array (11) and paralleling switch electric inductance array (12), send into the tandem tap electric inductance array (13) be connected in series after paralleling switch capacitor array (11) and paralleling switch electric inductance array (12) processing, the output signal of tandem tap electric inductance array (13) is directly sent into tandem tap capacitor array (14), exports afterwards late-class circuit to again;
Tandem tap electric inductance array (13) and tandem tap capacitor array (14), carry out first step conversion for the impedance that back, series circuit unit is connected to late-class circuit;
Paralleling switch capacitor array (11) and paralleling switch electric inductance array (12), further convert for the impedance of the late-class circuit to after first step conversion, the initial impedance of late-class circuit transformed to the center of Smith chart, completes impedance matching.
Wherein, described paralleling switch capacitor array (11) is composed in parallel by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and electric capacity; Wherein, N is greater than 1 natural number; One termination input signal connecting line of electric capacity, the drain electrode of another termination metal-oxide-semiconductor of electric capacity, the grid of metal-oxide-semiconductor connects control signal, the source ground of metal-oxide-semiconductor.
Wherein, described tandem tap capacitor array (14) is composed in parallel by M electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and electric capacity; Wherein, M is greater than 1 natural number; The source electrode of the metal-oxide-semiconductor in one of them electronic circuit connects the output of tandem tap electric inductance array (13), and the grid of metal-oxide-semiconductor connects control signal, and the drain electrode of its metal-oxide-semiconductor connects late-class circuit; The source electrode of the metal-oxide-semiconductor in all the other electronic circuits connects the output of tandem tap electric inductance array (13), and the grid of metal-oxide-semiconductor connects control signal, and the drain electrode of metal-oxide-semiconductor connects an end of electric capacity, another termination late-class circuit of electric capacity.
Wherein, described tandem tap electric inductance array (13) is composed in series by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and inductance; Wherein, N is greater than 1 natural number; The output of one termination front stage circuits of inductance and the source electrode of metal-oxide-semiconductor, the drain electrode of another termination metal-oxide-semiconductor of inductance, the grid of metal-oxide-semiconductor connects control signal.
Wherein, described paralleling switch electric inductance array (12) is composed in series by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and inductance; Wherein, N is greater than 1 natural number; The drain electrode of the metal-oxide-semiconductor in one of them electronic circuit connects the input signal cable of antenna, and the grid of metal-oxide-semiconductor connects control signal, and the source electrode of its metal-oxide-semiconductor connects the drain electrode of subordinate's metal-oxide-semiconductor in paralleling switch electric inductance array (12); The drain electrode of the metal-oxide-semiconductor in all the other electronic circuits connects the source electrode of higher level's metal-oxide-semiconductor in paralleling switch electric inductance array (12), and the grid of metal-oxide-semiconductor connects control signal, and the drain electrode of metal-oxide-semiconductor connects an end of inductance, and the source electrode of metal-oxide-semiconductor connects the other end of inductance; In paralleling switch electric inductance array (12), the source ground of afterbody metal-oxide-semiconductor.
Paralleling switch capacitor array 11 is composed in parallel by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and electric capacity; Wherein, N is greater than 1 natural number; One termination input signal connecting line of electric capacity, the drain electrode of another termination metal-oxide-semiconductor of electric capacity, the grid of metal-oxide-semiconductor connects control signal, the source ground of metal-oxide-semiconductor.
Control signal S
icontrol turning on and off of metal-oxide-semiconductor, realize corresponding capacitance access array circuit.The binary digital signal that the control signal S of paralleling switch capacitor array 11 is a N position, each S of binary signal
icontrol an electronic circuit.When the capacitive reactance of the specific capacitor in the lowest order electronic circuit is chosen to be C, the capacitive reactance of the specific capacitor in each electronic circuit is just definite, is 2
i* C.N the whole paralleling switch capacitor array 11 of electronic circuit formation in parallel, the capacitive reactance that makes this paralleling switch capacitor array 11 access the equivalent capacity at whole networkings can be 0～(2
n-1) in the scope of * C, change, the resolution precision is C.
In tandem tap capacitor array 14, a front N-1 electronic circuit has identical structure with the electronic circuit of described one group of paralleling switch capacitor array 11, but the source electrode of metal-oxide-semiconductor connects the output of front stage circuits.Digital signal most significant digit S "
n-1the electronic circuit of controlling is only by a metal-oxide-semiconductor M "
n-1form.Metal-oxide-semiconductor M when electronic circuit "
n-1during shutoff, the control mode of low N-1 position is identical with the low N-1 position of described paralleling switch capacitor array 11 with practical function.As metal-oxide-semiconductor M "
n-1during conducting, the metal-oxide-semiconductor short circuit that whole tandem tap capacitor array 14 is switched on, now, regardless of low N-1 position state in array, this array does not participate in mating tuning.N electronic circuit composes in parallel array, series connection access matching network circuit.
Tandem tap electric inductance array 13 is composed in series by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and inductance; Wherein, N is greater than 1 natural number; One termination input signal connecting line of inductance and the source electrode of metal-oxide-semiconductor, the drain electrode of another termination metal-oxide-semiconductor of inductance, the grid of metal-oxide-semiconductor connects control signal.
Control signal S ＇
icontrol turning on and off of metal-oxide-semiconductor, realize corresponding inductance access array circuit.The binary digital signal that the control signal S ＇ of tandem tap electric inductance array 13 is a N position, each S ＇ of binary signal
icontrol an electronic circuit.When the induction reactance of the specific inductance in the lowest order electronic circuit is chosen to be L, the induction reactance of the specific inductance in each electronic circuit is just definite, is 2
i* L.N electronic circuit whole tandem tap electric inductance array 13 in series, making this electric inductance array access the size of the equivalent inductance at whole networking can be 0～(2
n-1) in the scope of * L, change, the resolution precision is L.
In paralleling switch electric inductance array 12, a front N-1 electronic circuit has identical structure with the electronic circuit of described one group of tandem tap electric inductance array 13; Digital signal most significant digit S " ＇
n-1the electronic circuit of controlling is only by a metal-oxide-semiconductor M " '
n-1form.Metal-oxide-semiconductor M when electronic circuit " '
n-1during conducting, the control mode of low N-1 position is identical with the low N-1 position of described tandem tap electric inductance array 13 with practical function.As metal-oxide-semiconductor M " '
n-1during shutoff, whole paralleling switch electric inductance array 12 disconnects with matching network, and now, regardless of low N-1 position state in array, this array does not participate in mating tuning.N electronic circuit is composed in series array, access matching network circuit in parallel.
The present invention's beneficial effect compared with prior art is:
The present invention, for being integrated in IC inside, can realize the input feature vector impedance matching by steering order to radio-frequency front-end system easily, simple and quick.Simplified the external circuit of radio frequency front end chip simultaneously, reduced the number of devices of external circuit, for R&D process saves time and cost, be applicable to be integrated in various radio frequency front end chips inside, be widely used.
The accompanying drawing explanation
Fig. 1 is for the configurable matching network schematic diagram of satellite navigation radio-frequency front-end
Fig. 2 is for the configurable matching network embodiment schematic diagram of satellite navigation radio-frequency front-end
Matching network circuit scheme one schematic diagram of applying in Fig. 3 traditional circuit;
Matching network circuit scheme two schematic diagram of applying in Fig. 4 traditional circuit;
The electronic circuit schematic diagram of Fig. 5 binary weighting switched capacitor array;
The electronic circuit schematic diagram of Fig. 6 binary weighting switched inductors array;
Fig. 7 matching network is realized the traction path schematic diagram of impedance matching.
Embodiment
In order to make purpose of the present invention, technical scheme and applicating superiority clearer, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Shown in Fig. 2 basic composition theory diagram is to adopt configurable matching network of the present invention.After being connected in the radiofrequency signal receiving end, before the radio-frequency front-end processing units such as LNA.The parallel circuit that comprises one group of paralleling switch capacitor array 11 and one group of paralleling switch electric inductance array 12 is connected between radiofrequency signal receiving end and ground as the parallel circuit unit; The series circuit of one group of tandem tap electric inductance array 13 and tandem tap capacitor array 14, as the series circuit unit, is connected between the radio-frequency front-end processing modules such as radiofrequency signal receiving end and LNA.
Paralleling switch capacitor array 11 is composed in parallel by N (N is greater than 1 natural number) group same subunit, as shown in Figure 5, each subelement is comprised of metal-oxide-semiconductor and capacitances in series, in N (N is greater than 1 natural number) group electronic circuit, choosing of electric capacity capacitor value meets the binary weighting relation, precision choose the parameter that depends on other unit of radio frequency front end chip.
Paralleling switch electric inductance array 12 is composed in series by N (N is greater than 1 natural number) group subelement, and a front N-1 subelement has identical structure, and as shown in Figure 6, each subelement is comprised of metal-oxide-semiconductor and inductance in parallel, and N group subelement only consists of a metal-oxide-semiconductor.In N group electronic circuit, choosing of inductance induction reactance value meets the binary weighting relation, precision choose the parameter that depends on other unit of radio frequency front end chip.
Tandem tap electric inductance array 13 is composed in series by N (N is greater than 1 natural number) group same subunit, as shown in Figure 6, each subelement is comprised of metal-oxide-semiconductor and inductance in parallel, in N group electronic circuit, choosing of inductance induction reactance value meets the binary weighting relation, precision choose the parameter that depends on other unit of radio frequency front end chip.
Tandem tap capacitor array 14 is composed in parallel by N (N is greater than 1 natural number) group subelement, and a front N-1 subelement has identical structure, and as shown in Figure 5, each subelement is comprised of metal-oxide-semiconductor and capacitances in series, and N group subelement only consists of a metal-oxide-semiconductor.In N group electronic circuit, choosing of electric capacity capacitor value meets the binary weighting relation, precision choose the parameter that depends on other unit of radio frequency front end chip.
In the narrow-band impedance coupling, when an electric capacity is inserted in parallel connection in impedance matching network, insert the susceptance Δ B=Δ B of electric capacity
cfor just, its amplitude increases along with the increase of frequency of operation; Insert a shunt capacitance C
p, making impedance P lead smoother hour hands along the electricity such as grade in Smith chart and move, mobile arc length is determined by capacitance.When an inductance is inserted in parallel connection in impedance matching network, insert the susceptance Δ B=Δ B of inductance
lfor negative, its amplitude reduces along with the increase of frequency of operation; Insert a shunt inductance L
p, making impedance P lead circle along the medium electricity of Smith chart and move counterclockwise, mobile arc length is determined by inductance value.
When in impedance matching network, an inductance is inserted in series connection, the induction reactance Δ X=Δ X of insertion
lfor just, and its amplitude increases along with the increase of frequency of operation; Insert series inductance L
smake impedance P move along the smoother hour hands of the constant resistance of Smith chart, mobile arc length is determined by inductance value.When an electric capacity is inserted in the impedance matching network series connection, insert capacitive reactance Δ X=Δ X
cfor negative, its amplitude reduces with the increase of frequency of operation; Insert a series capacitance C
smake impedance P mobile counterclockwise along the constant resistance circle of Smith chart, mobile arc length is determined by capacitance.
In impedance matching network as shown in Figure 3, when series inductance LS increases, make initial impedance P move along the smoother hour hands of the constant resistance in Smith chart, how many decisions that mobile arc length is increased by inductance value.As series inductance L
swhile reducing, make initial impedance P mobile counterclockwise along the circle of the constant resistance in Smith chart, how many decisions that mobile arc length is reduced by inductance value.In traditional matching network, the operation that can only be increased or reduce by changing inductance element, in constantly debugging coupling, not only workload is large, loaded down with trivial details but also easily introduce imponderable parasitic parameter.And in described configurable matching network, only by the simple Digital Signals tandem tap electric inductance array 13 of passing through, change conducting or the off state of certain one or more metal-oxide-semiconductor, just can realize the change of the equivalent inductive reactance of whole array, can regard the increase of series inductance LS of equal valuely as or reduce, complete initial impedance P clockwise or counterclockwise movement along the constant resistance circle in Smith chart.Tentatively complete traction to initial impedance P to realize impedance matching.
In impedance matching network as shown in Figure 3, shunt capacitance C
pduring increase, make initial impedance P lead smoother hour hands along the electricity such as grade in Smith chart and move, mobile arc length is by how many decisions of the increase of capacitance.As shunt capacitance C
pwhile reducing, make initial impedance P lead round counterclockwise movement the, how many decisions that mobile arc length is reduced by capacitance along the electricity that waits in Smith chart.With traditional matching network, compare, in described configurable matching network, same only with simple by Digital Signals paralleling switch capacitor array 11, complete initial impedance P electricity such as edge in Smith chart and lead round clockwise or counterclockwise movement.Thereby further initial impedance P is drawn to the center of Smith chart.
At the described configurable matching network for the satellite navigation radio-frequency front-end, in order to make up the defect of the aspects such as traditional scheme one very flexible, debugging on Circuit Matching are complicated, to the parallel circuit cell level and link one group of paralleling switch electric inductance array 12.Shunt inductance L in impedance matching network
pduring increase, make initial impedance P lead round counterclockwise the movement along the electricity that waits in Smith chart; Shunt inductance L
pwhile reducing, make initial impedance P lead smoother hour hands along the electricity such as grade in Smith chart and move, how many decisions that mobile arc length is increased or reduced by inductance value.At the described configurable matching network for the satellite navigation radio-frequency front-end, identical with the control mode to tandem tap electric inductance array 13 to the control mode of paralleling switch electric inductance array 12.
At the described configurable matching network for the satellite navigation radio-frequency front-end; for the regulating action that makes tandem tap electric inductance array 13 more continuous; same uncontinuity of having connected after the Γ l network when tandem tap capacitor array 14 changes to make up tandem tap electric inductance array 13 can be done every straight protection the processing units such as amplification of rear class simultaneously.Series capacitance C
sduring increase, make initial impedance P mobile counterclockwise along the circle of the constant resistance in Smith chart; As series capacitance C
swhile reducing, make initial impedance P move along the smoother hour hands of the constant resistance in Smith chart, how many decisions that mobile arc length is increased or reduced by capacitance.A little less than series capacitance is compared the effect of series inductance to the draw of initial impedance P, therefore with electric capacity, the draw of inductance is finely tuned.At the described configurable matching network for the satellite navigation radio-frequency front-end, identical with the control mode to paralleling switch capacitor array 11 to the control mode of tandem tap capacitor array 14.
Structure shown in Fig. 2 is while adopting this kind for the configurable matching network of satellite navigation radio-frequency front-end, radio frequency receiving signal to be transmitted, the application structure schematic diagram that radio frequency front end chip is carried out to impedance matching.After antenna receives radiofrequency signal, transfer to the radio frequency front end chip input port.In order to guarantee that radio-frequency module completes in the maximum power transfer without in the phase shift situation, the input port of radio frequency front end chip integrated the configurable matching network of this kind for the satellite navigation radio-frequency front-end, radio signal transmission enters the processing units such as LNA and other radiofrequency signal amplification, down coversion, filtering after this matching network.As previously described, when the input port impedance matching is unreasonable, can produce reflection, therefore need to send digital controlled signal by host computer, by the corresponding register of SPI mouth configure radio-frequency front-end chip internal, the equivalent capacitive reactance of capacitor array and the equivalent inductive reactance of electric inductance array are regulated and controled, first by the tandem tap electric inductance array 13 in regulation and control series circuit unit and the initial impedance of 14 pairs of late-class circuits of tandem tap capacitor array, carry out first step traction, then the paralleling switch capacitor array 11 in the parallel circuit unit is configured with paralleling switch electric inductance array 12, impedance in the first step is further drawn, and initial impedance is drawn to the center of Smith chart the most at last, thereby the input feature vector impedance adjustment of whole radio-frequency front-end is matched to 50 ohm, realize the regulation and control of coupling.For example, when the normalized impedance of initial impedance P is positioned at a certain zone of Smith chart, during position, this scheme can be drawn to initial impedance P the center O of Smith chart as shown in Figure 7.Along the traction in P-A-O path, at first the first step, first turn suitable value down by the equivalent inductance by tandem tap electric inductance array 13, or the equivalent capacity of tandem tap capacitor array 13 is tuned up to suitable value, and initial impedance P is drawn to the point to A along the constant resistance circle; Second step, then tune up appropriate value by the equivalent capacitance value by tandem tap capacitor array 14, or turn the equivalent inductance value of paralleling switch electric inductance array 12 down appropriate value, the electricity such as initial impedance edge can be led to circle and draw the center O to Smith chart by the A point.
The above is only a kind of concrete embodiment of the present invention.This implementation is a kind of of Γ type network, in addition T-shaped, Π type etc. in addition.Protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. the configurable matching network for the satellite navigation radio-frequency front-end, comprise parallel circuit unit and series circuit unit, it is characterized in that: described parallel circuit unit comprises paralleling switch capacitor array (11) and the paralleling switch electric inductance array (12) be connected in parallel; Described series circuit unit comprises tandem tap electric inductance array (13) and the tandem tap capacitor array (14) be connected in series successively; At first the radiofrequency signal that antenna is sent into enters paralleling switch capacitor array (11) and paralleling switch electric inductance array (12), send into the tandem tap electric inductance array (13) be connected in series after paralleling switch capacitor array (11) and paralleling switch electric inductance array (12) processing, the output signal of tandem tap electric inductance array (13) is directly sent into tandem tap capacitor array (14), exports afterwards late-class circuit to again;
Tandem tap electric inductance array (13) and tandem tap capacitor array (14), carry out first step conversion for the impedance that back, series circuit unit is connected to late-class circuit;
Paralleling switch capacitor array (11) and paralleling switch electric inductance array (12), further convert for the impedance of the late-class circuit to after first step conversion, the initial impedance of late-class circuit transformed to the center of Smith chart, completes impedance matching.
2. a kind of configurable matching network for the satellite navigation radio-frequency front-end according to claim 1, it is characterized in that: described paralleling switch capacitor array (11) is composed in parallel by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and electric capacity; Wherein, N is greater than 1 natural number; One termination input signal connecting line of electric capacity, the drain electrode of another termination metal-oxide-semiconductor of electric capacity, the grid of metal-oxide-semiconductor connects control signal, the source ground of metal-oxide-semiconductor.
3. a kind of configurable matching network for the satellite navigation radio-frequency front-end according to claim 1, it is characterized in that: described tandem tap capacitor array (14) is composed in parallel by M electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and electric capacity; Wherein, M is greater than 1 natural number; The source electrode of the metal-oxide-semiconductor in one of them electronic circuit connects the output of tandem tap electric inductance array (13), and the grid of metal-oxide-semiconductor connects control signal, and the drain electrode of its metal-oxide-semiconductor connects late-class circuit; The source electrode of the metal-oxide-semiconductor in all the other electronic circuits connects the output of tandem tap electric inductance array (13), and the grid of metal-oxide-semiconductor connects control signal, and the drain electrode of metal-oxide-semiconductor connects an end of electric capacity, another termination late-class circuit of electric capacity.
4. a kind of configurable matching network for the satellite navigation radio-frequency front-end according to claim 1, it is characterized in that: described tandem tap electric inductance array (13) is composed in series by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and inductance; Wherein, N is greater than 1 natural number; The output of one termination front stage circuits of inductance and the source electrode of metal-oxide-semiconductor, the drain electrode of another termination metal-oxide-semiconductor of inductance, the grid of metal-oxide-semiconductor connects control signal.
5. a kind of configurable matching network for the satellite navigation radio-frequency front-end according to claim 1, it is characterized in that: described paralleling switch electric inductance array (12) is composed in series by N electronic circuit, and each electronic circuit consists of metal-oxide-semiconductor and inductance; Wherein, N is greater than 1 natural number; The drain electrode of the metal-oxide-semiconductor in one of them electronic circuit connects the input signal cable of antenna, and the grid of metal-oxide-semiconductor connects control signal, and the source electrode of its metal-oxide-semiconductor connects the drain electrode of subordinate's metal-oxide-semiconductor in paralleling switch electric inductance array (12); The drain electrode of the metal-oxide-semiconductor in all the other electronic circuits connects the source electrode of higher level's metal-oxide-semiconductor in paralleling switch electric inductance array (12), and the grid of metal-oxide-semiconductor connects control signal, and the drain electrode of metal-oxide-semiconductor connects an end of inductance, and the source electrode of metal-oxide-semiconductor connects the other end of inductance; In paralleling switch electric inductance array (12), the source ground of afterbody metal-oxide-semiconductor.
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