CN103916159A

CN103916159A - Circuits And Methods For Reducing Insertion Loss Effects Associated With Radio-frequency Power Couplers

Info

Publication number: CN103916159A
Application number: CN201310757341.9A
Authority: CN
Inventors: R·A·赖斯纳; J·C·巴尔德文
Original assignee: Conexant Systems LLC
Current assignee: Skyworks Solutions Inc; Conexant Systems LLC
Priority date: 2012-10-29
Filing date: 2013-10-29
Publication date: 2014-07-09
Anticipated expiration: 2033-10-29
Also published as: KR20140056027A; CN103916159B

Abstract

Disclosed are circuits and methods for reducing insertion loss effects associated with radio-frequency (RF) power couplers. In some implementations, an RF circuit can include a first path configured to route a first RF signal in a first band, and a second path configured to route a second RF signal in a second band. The RF circuit can further include a power detector having a first coupler configured to detect power along the first path, and a second coupler configured to detect power along the second path. The first coupler and the second coupler can be connected in a daisy-chain configuration. The RF circuit can further include an adjustment circuit implemented along at least one of the first path and the second path. The adjustment circuit can be configured to move a frequency response feature associated with the power detector to a different frequency range.

Description

Reduce circuit and the method for the insertion loss impact relevant to radio-frequency power coupler

The cross reference of related application

The U.S. Provisional Application No.61/719 that the application requires is that on October 29th, 2012 submits to, by name " for circuit and the method for the insertion loss trap (notch) that reduces to be associated with radio-frequency power coupler ", 865 priority, its content by reference entirety is clearly herein incorporated.

Technical field

The disclosure relates generally to reduce the insertion loss impact being associated with radio-frequency power coupler.

Background technology

In some wireless devices, power coupler can be used for for example limiting the maximum power for the transmission signal of multiple frequency bands.Such power coupler can daisy chain links together to share and couples circuit, spaced apart on circuit board thus.

Such structure can cause the insertion loss trap (notch) being associated with daisy chain circuit at high frequency band causing due to various interactions.If the insertion loss trap in the frequency range of allocated frequency band is enough large and can not calibrate, the problem being associated with this insertion loss trap can be more serious.

Summary of the invention

According to multiple realizations, the disclosure relates to a kind of radio frequency (RF) circuit, and it comprises the first path that is configured to transmit at the first frequency band a RF signal, and is configured to transmit at the second frequency band the second path of the 2nd RF signal.This RF circuit further comprises power detector, and this power detector has first coupler of the detection of being configured to along the power in the first path, and is configured to detect the second coupler along the power in the second path.The first coupler is connected with daisy-chain configuration with the second coupler.This RF circuit further comprises along the regulating circuit of at least one realization in the first path and the second path.Regulating circuit is configured to the frequency-response characteristic being associated from power detector to move to different frequency ranges.

In certain embodiments, regulating circuit can make the part in the second path.Each in the first path and the second path can comprise power amplifier (PA), be connected to output matching network and the corresponding power coupler of PA.The second path can further be included in the regulating circuit of realizing between output matching network and the second power coupler.This regulating circuit can be included in the inductance of realizing between output matching network and the second power coupler, for example inductor.This regulating circuit can further comprise the electric capacity being connected in series with this inductance, for example capacitor.

In certain embodiments, output matching network can comprise the coupling inductance of the output that is connected to PA, and is connected to the shunt capacitance of the output of coupling inductance.

In certain embodiments, frequency-response characteristic can comprise the trap in the power spectrum being associated with power detector.In certain embodiments, the first frequency band can comprise E-UTRA frequency band B7, B38 or B40.The second frequency band can comprise E-UTRA frequency band B18 or B8.

In certain embodiments, different frequency ranges can comprise the first or second untapped scope in path.In certain embodiments, this different frequency range can be included in the frequency range between E-UTRA frequency band B8 and B4.In certain embodiments, regulating circuit can be configured to trap is moved to lower frequency.In certain embodiments, the lower frequency that trap moves to can be between the frequency being associated with the first frequency band and the second frequency band.

In certain embodiments, the disclosure relates to a kind of radio frequency (RF) module, and it comprises the base plate for packaging and the RF circuit of realization on base plate for packaging that are configured to hold multiple parts.This RF circuit comprises the first path that is configured to transmit at the first frequency band a RF signal, and is configured to transmit at the second frequency band the second path of the 2nd RF signal.This RF circuit also comprises power detector, and this power detector has first coupler of the detection of being configured to along the power in the first path, and is configured to detect the second coupler along the power in the second path.This first coupler is connected with daisy-chain configuration with this second coupler.This RF circuit also comprises along the regulating circuit of at least one realization in described the first path and the second path.This regulating circuit is configured to the frequency-response characteristic being associated from power detector to move to different frequency ranges.

In certain embodiments, RF module can be power amplifier module, thus the output that the output that described the first path comprises the first power amplifier (PA) and described the second path comprise the 2nd PA.In certain embodiments, the first and second PA both can realize on semiconductor chip.

According to numerous embodiments, the disclosure relates to a kind of radio frequency (RF) equipment, and it comprises the transceiver that is configured to processing RF signals, and with this transceiver communications and be configured to the antenna of the transmission of the RF signal of convenient amplification.This RF equipment further comprises power amplifier (PA) module that is connected to transceiver and is configured to generate the RF signal amplifying.This PA module comprises the first path that is configured to transmit at the first frequency band a RF signal, and is configured to transmit at the second frequency band the second path of the 2nd RF signal.This PA module also comprises power detector, and this power detector has first coupler of the detection of being configured to along the power in the first path, and is configured to detect the second coupler along the power in the second path.This first coupler is connected with daisy-chain configuration with this second coupler.This PA module also comprises along the regulating circuit of at least one realization in described the first path and the second path.This regulating circuit is configured to the frequency-response characteristic being associated from power detector to move to different frequency ranges.In certain embodiments, RF equipment can comprise wireless device.

In many instructions, the disclosure relates to a kind of radio frequency (RF) circuit, and it comprises the first circuit, and this first circuit has the frequency response that comprises the feature in selected frequency range.RF circuit also comprises second circuit, and this second circuit is coupled to this first circuit, thereby feature at least a portion of described frequency response couples owing to this.RF circuit also comprises and is configured to regulating circuit that this feature is removed from selected frequency range.

In certain embodiments, described feature is insertion loss trap for example, and it can be moved to lower frequency.

According to multiple realization, the disclosure relates to a kind of for operating the method for radio frequency (RF) equipment.The method comprises and detecting along the first path in daisy-chain configuration and the power in the second path.This first path is configured to transmit a RF signal at the first frequency band, and this second path is configured to transmit the 2nd RF signal at the second frequency band.The method also comprises at least one adjusting in the first path and the second path, so that the frequency-response characteristic being associated from power detection is moved to different frequency ranges.

In some implementations, the disclosure relates to a kind of for operating the method for radio frequency (RF) equipment.The method comprises and couples the first circuit and second circuit, and described the first circuit has the frequency response that comprises the feature in selected frequency range.This feature at least a portion of this frequency response couples owing to this.The method also comprises adjusting second circuit so that this feature is removed from selected frequency range.

In order to summarize the disclosure, the feature of some aspect of the present invention, advantage and innovation is described herein.Should be appreciated that according to any specific embodiment of the present invention without realizing all these advantages.Therefore, the present invention can implement in such a way or carry out, and which obtains or optimize an advantage or one group of advantage of instruction herein, and without other advantage that realizes instruction herein or suggestion.

Accompanying drawing explanation

Figure 1A and 1B illustrate that radio frequency (RF) circuit can produce less desirable response in interested frequency band in some configurations.

Fig. 2 A and 2B illustrate in some embodiments can provide regulating circuit so that less desirable response is removed from interested frequency band to the RF circuit of Fig. 1.

Fig. 3 illustrates the example RF circuit that can produce less desirable response in operational frequency bands.

Fig. 4 A-4C is illustrated in the example of the various traps in the frequency response being associated with the exemplary circuit of Fig. 3.

Fig. 5 A and 5B illustrate that each has the example of the RF circuit of the regulating circuit that is configured to notch response to remove from operational frequency bands.

Fig. 6 illustrates the example of the regulating circuit of Fig. 5.

Fig. 7 illustrates another example of the regulating circuit of Fig. 5.

Fig. 8 illustrates the example of the notch response of removing from operational frequency bands due to regulating circuit.

Fig. 9 and 10 illustrates that comprising regulating circuit for an exemplary operations frequency band can maintain insertion loss performance substantially.

Figure 11 and 12 illustrates another example that comprises regulating circuit and can substantially maintain insertion loss performance for another operational frequency bands.

Figure 13 illustrates the processing that can be implemented to operate the RF equipment with one or more features as described herein.

Figure 14 illustrates another processing that can be implemented to operate the RF equipment with one or more features as described herein.

Figure 15 illustrates that one or more feature of the present disclosure can realize in RF module in certain embodiments.

Figure 16 A and 16B illustrate that one or more feature of the present disclosure can realize in wireless device in certain embodiments.

Embodiment

Title (if any) provided herein is only used to conveniently, not must affect desired scope of invention or connotation.

Figure 1A has schematically described radio frequency (RF) circuit 10, and it can be configured to receive RF signal (RF_in) and produce output signal (RF_out).In some cases, and as shown in Figure 1B, such circuit can produce the less desirable minimizing that is included in selected frequency range 20 or the frequency response of increase.For example, illustrate that frequency response curve 12 comprises crest 14, its part is present in frequency range 20 and exceedes threshold value 16.In another example, illustrate that frequency response curve 32 comprises trough 34, its part is present in frequency range 20 and lower than threshold value 36.

Fig. 2 A illustrates in certain embodiments, and RF circuit 100 can comprise regulating circuit 102.Object in order to describe herein, the RF circuit 100 hypothesis to without regulating circuit 102 can show similarly with the RF circuit of describing with reference to Figure 1A and 1B.

Illustrate and exist regulating circuit 102 to produce the frequency response after regulating, and in Fig. 2 B, described the example of this adjusting.For example, the frequency response curve 112 corresponding with the example response curve 12 of Figure 1B is shown as and comprises the crest 114 that is moved out of frequency range 20.Therefore, the part of response curve 112 in frequency range 20 is lower than threshold value 16.In another example, the frequency response curve 132 corresponding with the example response curve 32 of Figure 1B is shown as and comprises the trough 134 that is moved out of frequency range 20.Therefore, the part of response curve 132 in frequency range 20 is higher than threshold value 36.

In Fig. 2 B, example crest 114 and example trough 134 are described to be moved to (as arrow 118,138) lower frequency.But, will understand, can carry out this and move to higher frequency.

Fig. 3 shows example RF circuit 10, and it can be from as benefited in one or more features described herein.Circuit 10 relates in general to the power coupler for RF equipment, for example wireless phone.Such power coupler can be used to, for example, and maximum transmit power or the specific absorption rate (SAR) of restriction wireless device.

In exemplary circuit 10, power coupler assembly can totally be designated as 70 and be configured to provide power detection for two example bands A and B.The first frequency band A (for example high frequency band) is shown as by path A and facilitates (facilitate), and path A comprises the RF input (RFIN_A) for power amplifier (PA) 50a.PA50a can comprise one or more level, and the output of afterbody is shown as and is connected to output matching network 60a.Although do not illustrate in Fig. 3, path A can also comprise input matching network and/or one or more inter-stage matching network.The output of matching network 60a is shown in to be provided to before duplexer 80a and couples with power coupling element, and duplexer 80a is configured to use one or more antennas that are connected to node ANT_A for example, for example, to provide duplex capability between (the RF signal of the amplification by path A) transmission and (to the reception signal of RX_P_A and RX_N_A) reception.

Similarly, the second frequency band B (for example low-frequency band) is shown as by path B and facilitates, and path B comprises the RF input (RFIN_B) for power amplifier (PA) 50b.PA50b can comprise one or more level, and the output of afterbody is shown as and is connected to output matching network 60b.Although do not illustrate in Fig. 3, path B also can comprise input matching network and/or one or more inter-stage matching network.The output of matching network 60b is shown in to be provided to before duplexer 80b and couples with power coupling element, and duplexer 80b is configured to use one or more antennas that are connected to node ANT_B for example, for example, to provide duplex capability between (the RF signal of the amplification by path B) transmission and (to the reception signal of RX_P_B and RX_N_B) reception.

In exemplary circuit 10, PA50a, 50b is shown as by biasing/control circuit 52 and setovers and control.In certain embodiments, this class biasing and/or control operation can be implemented in known manner.

In exemplary circuit 10, the coupler output of each frequency band can be used power combiner circuit (not shown) or daisy chain to be grouped together, and wherein each coupler shares one and couples circuit.Can use daisy chain design more to save for example, space on circuit board (phone plate) with for example specific power Combination Design.

In some configurations, utilize the power detection of the output at low-frequency band PA of daisy chain coupler in daisy chain circuit, to produce insertion loss trap at high frequency band due to the interaction of output matching network, coupler and/or duplexer.In some cases, in the design that high frequency band and low-frequency band coexist, this problem can be more serious.Notch depth can change, and can be equal to or greater than the dynamic range of transceiver detector, and therefore conventionally between phone plate alignment epoch, can not go out in school.In the environment of example dual-band configuration, can produce two aforesaid daisy chain traps.

Fig. 4 A-4C shows the example of trap in frequency response, and it for example, in the case of existing in two RF paths (path A and path B) or can causing daisy chain coupler (70 in Fig. 3) both.In Fig. 4 A, for forward power frequency spectrum, show the analog response of daisy chain coupler component and measure response according to S parameter S 21.This daisy chain coupler component can be used for the double frequency-band PA circuit of example.In two responses, dark and significant trap appears in about frequency range of 2.0 to 2.6GHz.This scope can comprise for example E-UTRA of B7, B34, B38 and B40 (the general land wireless access of evolution) operational frequency bands, or overlapping with this operational frequency bands.

In Fig. 4 B, for forward power frequency spectrum, show the analog response of similar daisy chain coupler component and measure response according to S parameter S 21.This daisy chain coupler component is for the double frequency-band PA circuit of another example.In two responses, dark and significant trap appears in about frequency range of 2.0 to 2.6GHz.This scope can comprise the E-UTRA operational frequency bands of for example B7, B34, B38 and B40, or overlapping with this operational frequency bands.

In Fig. 4 C, show corresponding return loss (RL) crest of the example trap in forward power frequency spectrum and example for S21, with the frequency at about 2.0GHz and around locate to provide deteriorated significantly.This frequency range can be overlapping with the operational frequency bands of for example B1 significantly, and affect thus this operational frequency bands.

The loseless method of eliminating above-mentioned daisy chain trap completely does not also succeed substantially.Described herein is to reduce or the basic circuit of frequency range and the various examples of method of eliminating for the impact of this operational frequency bands for this trap is moved to wherein trap from operational frequency bands.In some implementations, this frequency range that trap moves to can comprise untapped frequency range.In some implementations, this untapped frequency range can be completely untapped for given wireless device.In some implementations, this untapped frequency range can be included in operating period in this operational frequency bands not by the scope using but can use in another operator scheme.

Fig. 5 A shows example similar to the exemplary circuit 10 of Fig. 3, be still equipped with the circuit of regulating circuit 102 in given RF signal path with 5B.To the example of this regulating circuit 102 be described in further detail herein.Fig. 5 A shows one or more feature of the present invention and can in the configuration of two RF signal paths with the example that is similar to Fig. 3, realize.Fig. 5 B shows one or more feature of the present invention and can in the configuration with plural RF signal path, realize.

Configuration in example arrangement shown in Fig. 5 A and Fig. 3 is similar, but has added the regulating circuit 102a with one or more features described herein, 102b.The example of more detailed description circuit section 150a, 150b herein, each comprises that the afterbody of its corresponding PA50 (is 50a for circuit section 150a circuit section 150a, 150b, and be 50b for circuit section 150b), output matching network 60 (is 60a for circuit section 150a, and be 60b for circuit section 150b) and regulating circuit 102 (be 102a for circuit section 150a, and be 102b for circuit section 150b).

The configuration of example arrangement shown in Fig. 5 B and Fig. 5 A is similar, but has added the 3rd RF signal path (path C) and corresponding regulating circuit 102c.The example of more detailed description circuit section 150a, 150b, 150c herein, each comprises afterbody, output matching network 60 and the regulating circuit 102 of its corresponding PA50 circuit section 150a, 150b, 150c.

In the example of Fig. 5 A and 5B, each RF path is shown as and comprises regulating circuit 102.In some implementations, not every RF path all needs to have this regulating circuit.For example, high frequency band coupler can for example, not throw into question conventionally in interested frequency or frequency range (0.5 to 2.6GHz).Be usually located at much higher frequency place (for example, approximately 5.5GHz) by the be coupled notch response that causes of this high frequency band.Therefore,, in this example arrangement, high frequency band RF path can have or can not have regulating circuit 102.

Fig. 6 shows the example with reference to the circuit section 150 of Fig. 5 A and 5B description.In certain embodiments, can be for the circuit section 150 of each the enforcement Fig. 6 in the circuit section 150a-150c in the circuit section 150a of Fig. 5 A and 150b and Fig. 5 B.In example, the base stage providing to the bipolar junction transistor (BJT) being associated with the afterbody (50 in Fig. 5 A and 5B) of PA is provided the RF signal being exaggerated.The collector electrode of BJT is shown as the output of the afterbody that PA is provided, and this output signal is shown as by output matching network 60 and mates.Should be appreciated that the transistor that can also use other type in PA50.

Example output matching network 60 is outputted as the inductance L 1 (for example inductor) in path of collector electrode comprising along being connected to BJT.Output matching network 60 is outputted as the shunt capacitance C1 (for example capacitor) between the output the earth that is also included in inductance L 1.In some implementations, thus can provide electric capacity to connect with inductance L 1.Should be appreciated that the output matching network that also can use other type.

Fig. 6 shows in some implementations, and regulating circuit 102 can comprise the inductance L 2 (for example inductor) of connecting with inductance L 1.Therefore, amplifying signal for example,, being provided to coupled section (appropriate section of the daisy chain coupler 70 in Fig. 5 A and 5B) before, can be propagated from the collector electrode of BJT, through L1, and through L2.

Fig. 7 shows another example with reference to the circuit section 150 of Fig. 5 A and 5B description.In this example, the afterbody of PA50 and output matching network 60 can be with reference to Fig. 6, described those be similar.

Fig. 7 shows in some implementations, the capacitor C 2 (for example capacitor) that regulating circuit 102 can comprise inductance L 2 (for example inductor) and be connected in series with inductance L 1.Therefore, amplifying signal for example,, being provided to coupled section (part separately of the daisy chain coupler 70 in Fig. 5 A and 5B) before, can be propagated from the collector electrode of BJT, through L1, through L2, also through C2.

In some implementations, some or all in the above-mentioned example of regulating circuit 102 can be configured to revise the band external impedance of output matching network, so that the trap frequency being associated with daisy chain coupler component is moved to (shift) extremely, for example, the frequency range for example, not used between frequency band 8 and frequency band 4 (0.960 to 1.710GHz).In some implementations, the series LC circuit 102 of Fig. 7 can be configured to the function that provides above-mentioned, reduces better or minimize simultaneously the degeneration of other performance parameter of for example insertion loss and frequency-flat degree than the circuit that only has inductance 102 of Fig. 6.

In some implementations, electric capacity (not shown) that provide along RF signal path, after output matching network 60 but before power coupled section can be provided for each of Fig. 6 and 7 regulating circuit 102.Herein by the example of this replacement of more detailed description and beneficial effect.

Fig. 8 how to show can by cover one or more operational frequency bands or and the overlapping trap of these one or more operational frequency bands move to above-mentioned example ranges between for example frequency band 8 and frequency band 4 not by the example of frequency of utilization scope.The curve 160 corresponding with the circuit of Fig. 3 is outputted as and comprises trap 162, its cover undesirably frequency band B7, B38 and B40 or with the frequency range of this band overlapping in have than example threshold low-value of 2dB.

In the example of Fig. 8, curve 170 and 180 be outputted as have its separately, move to the trap 172,182 in the frequency range not used between B8 and B4 frequency band.Curve 170,180 covers above-mentioned B7/B38/B40 frequency band or is shown as the numerical value be much higher than-2dB threshold value with the part of this band overlapping.

Arrow 164 shows approximate gain, and it can obtain between smooth response roughly flattening of the trap of curve 160 162 and example plot 180.The arrow 166 that represents power detection dynamic range (for example 4dB) shows unadjusted trap 162 undesirably close to exceeding this dynamic range, and the trap 172,182 after moving drops in this dynamic range well.Therefore,, if for one or two expectation calibrations in response 170,180, it can be implemented.

Its trap 172 is moved out of the example response curve 170 of operational frequency bands B7/B38/B40 corresponding to the regulating circuit 102 in the Fig. 7 providing for exemplary low frequency band B18 signal path.The shunt capacitance C1 of output matching network 60 has the value of about 7.6pF.The inductance L 2 of regulating circuit 102 and capacitor C 2 have respectively the value of about 4.3nH and 5.6pF.Regulating circuit 102 replaces along signal path, at the electric capacity (not shown) of about 18pF of the output of output matching network 60.In the example of Fig. 7, L1 is output matching inductance (for example inductance coil), and it can be implemented as trace (trace) rather than obvious surface mounting assembly.Inductance L 1 has the value of about 2.3nH in example, and it does not change in response to the introducing of regulating circuit 102 conventionally.

Its trap 182 is moved out of the example response curve 180 of operational frequency bands B7/B38/B40 corresponding to the regulating circuit 102 in the Fig. 7 providing for exemplary low frequency band B8 signal path.The shunt capacitance C1 of output matching network 60 has the value of about 6.8pF.The inductance L 2 of regulating circuit 102 and capacitor C 2 have respectively the value of about 4.7nH and 5.1pF.Regulating circuit 102 replaces along signal path, at the electric capacity (not shown) of about 18pF of the output of output matching network 60.

Fig. 9-12 show regulating circuit described herein can provide the trap locomotive function of expectation (for example Fig. 8), and there is no obvious performance degradation in other region.Fig. 9 and 10 illustrates respectively have (curve 170 of for example Fig. 8) and for example do not have, in the situation of (curve 160 of Fig. 8) regulating circuit, for the Smith chart of the S11 parameter of exemplary low frequency band B18 signal path.Figure 11 and 12 shows respectively to be had (curve 180 of for example Fig. 8) and does not for example have, in the situation of (curve 160 of Fig. 8) regulating circuit, for the Smith chart of the S11 parameter of exemplary low frequency band B8 signal path.For all above-mentioned example arrangement, each signal path has the load impedance of about 500hms.

For the example (Fig. 9 and 10) of B18 frequency band, obtain input impedance (Zin) at three frequency places and measure, and the results are shown in Table 1.Can find out to have in the situation of regulating circuit for the Zin value of B18 signal path and be better than not having those Zin values for B18 signal path in the situation of regulating circuit.

Table 1

For the example (Figure 11 and 12) of B8 frequency band, obtain input impedance (Zin) at three frequency places and measure, and the results are shown in Table 2.Can find out to have in the situation of regulating circuit for the Zin value of B8 signal path and be better than not having those Zin values for B8 signal path in the situation of regulating circuit.

Table 2

Figure 13 shows and processes 200, and it can be implemented as the RF equipment with one or more features described herein that operates.In certain embodiments, this RF equipment can comprise the circuit of one or more examples of for example describing with reference to Fig. 5-7.In piece 202, can provide the configuration of daisy chain power detection for the first and second RF signal paths.In piece 204, at least one in the first and second RF paths can be adjusted to the frequency-response characteristic being associated from power detection is moved to different frequency ranges.

Figure 14 shows and processes 210, and it can be implemented as the RF equipment with one or more features described herein that operates.In certain embodiments, this RF equipment can comprise the circuit of one or more examples of for example describing with reference to Fig. 5-7.In piece 212, the first circuit and the second circuit of RF equipment can be coupled, thereby the first circuit comprises having owing to coupling the frequency response of the feature in the selected frequency range causing.In certain embodiments, this couples and can be implemented as daisy chain power-sensing circuit, and this daisy chain power-sensing circuit is configured to detect the output power stage of the first and second RF power amplifiers.In piece 214, second circuit can be adjusted to be removed this feature from selected frequency range.In some implementations, this feature can be included in the trap in frequency response.In some implementations, this trap can be moved to all untapped lower frequency ranges of the first and second circuit.

In some implementations, one or more feature described herein can be included in a module.Figure 15 schematically shows exemplary module 300, and it comprises the PA chip 302 for each in multiple amplification paths with a PA50.By way of example, the first and second amplification paths are shown as and comprise PA50a, 50b, its each there are one or more levels; And to PA50a, the input rf signal (RFIN_A, RFIN_B) of 50b is shown as and is provided through its input matching network 308a, 308b separately.

PA50a, 50b is shown as with setover/control circuit 52 (line 306a, 306b) and communicates by letter.This biasing/control circuit 52 can be configured to based on for example control signal input 304, in known manner PA50a, 50b be provided biasing and/or control function.In certain embodiments, this biasing/control circuit 52 can be implemented in the chip separating with PA chip 302.In certain embodiments, this biasing/control circuit 52 can be implemented in the chip identical with PA chip 302.

The output of the one PA50a is shown as and is connected to the first matching network 60a.Similarly, the output of the 2nd PA50b is shown as and is connected to the second matching network 60b.

The output of the first matching network 60a is shown as and is connected to the first regulating circuit 102a with one or more features described herein.Similarly, the output of the second matching network 60b is shown as and is connected to the second regulating circuit 102b with one or more features described herein.In certain embodiments, with the first and second regulating circuit 102a, the inductance that each in 102b is associated can for example, by the parts that separate (surface install inductor), one or more conducting path or its, some combine to provide.In the embodiment connecting with above-mentioned inductance at electric capacity, this electric capacity can for example, be provided by the parts that for example separate (capacitor that install on surface).

The output of the first regulating circuit 102a is shown in and is transferred into output node (RFOUT_A) and is connected to before power coupled section 70a.Similarly, the output of the second regulating circuit 102b is shown in and is transferred into output node (RFOUT_B) and is connected to before power coupled section 70b.In the example shown, the first and second power coupled section 70a, 70b are that daisy chain links together between being shown in coupler input 310 and exporting 312.

As described here, above-mentioned daisy chain between power coupled section can cause a signal path (for example low-frequency band path) to affect this another signal path (for example high frequency band path) by the notch response in the one or more operational frequency bands that for example for example, are associated with another signal path (high frequency band path).In some cases, may not there is not contrary impact (for example high frequency band is coupled and affected low-frequency band by daisy chain), or the contrary impact of the relatively little value of existence, or this contrary impact is present in not too care or unconcerned frequency range (for example, in the frequency range not used by any frequency band).Herein in the background of described exemplary high frequency band, and the notch response that this high frequency band is associated is usually located at much higher frequency (for example, between 5 to 6GHz), and it does not affect other operational frequency bands conventionally.Therefore, in this case, first signal path (for example high frequency band path) can have or not have regulating circuit (102a).Therefore, will understand, for as multiple signal paths described herein, some or all in these paths can comprise one or more regulating circuits.

In the exemplary module 300 of Figure 15, various parts described herein can be on base plate for packaging 320 or the interior outfit of this base plate for packaging 320 or formation.In certain embodiments, base plate for packaging 320 can comprise laminated substrate.In certain embodiments, module 300 also can comprise one or more encapsulating structures, the protection of module 300 to be for example provided and to contribute to the easier processing of module 300.This encapsulating structure can comprise that being formed on base plate for packaging 320, being also cut size (dimensioned) is the basic rubber-coating module (overmold) that seals various circuit and parts.

In some implementations, the equipment and/or the circuit that have one or more features described herein can be included in the RF equipment of for example wireless device.Described equipment and/or circuit can directly be realized with the form of module described herein or with their form of some combinations in wireless device.In certain embodiments, such wireless device can comprise such as cell phone, smart phone, have or do not have hand-held wireless device, the wireless flat etc. of telephony feature.

Figure 16 A and 16B schematically show the exemplary wireless device 400 with one or more useful features described herein.Example shown in Figure 16 A is for Frequency Division Duplexing (FDD) (FDD) configuration, and the example shown in Figure 16 B is for time division duplex (TDD) configuration.

In each in two exemplary wireless device of Figure 16 A and 16B, PAS0, its input and output match circuit (60), regulating circuit 102 and coupling circuit 70 can be realized in the module 300 described in Figure 15.PA50 can receive its RF signal separately from the transceiver 410 that configures in known manner and operate.Transceiver 410 can be configured to the RF signal that generation will be exaggerated and transmit, and processes the signal receiving.Transceiver 410 is shown as with baseband subsystems 408 and interacts, and this baseband subsystems 408 is configured to provide the conversion between the RF signal that is suitable for user's data and/or voice signal and is suitable for transceiver 410.Transceiver 410 is also shown as and is connected to power management components 406, and it is configured to the power of bookkeeping wireless device.This power management also can be controlled the operation of baseband subsystems 408 and module 300.

Baseband subsystems 408 is shown as and is connected to user interface 402 to user provide and from user receive voice and/or the various input and output of data.Baseband subsystems 408 also can be connected to memory 404, and this memory 404 is configured to store data and/or instruction so that operate wireless device and/or provide the storage of information for user.

In the exemplary wireless device 400 of Figure 16 A, the output of module 300 is illustrated by its duplexer 80a, 80b and frequency band selection switch 414 separately and is sent to antenna 416.Frequency band selection switch 414 can comprise for example single-pole double throw (for example SPDT) switch, to allow the selection of operational frequency bands.Although be described under the background of exporting at two frequency bands of module 300, will be understood that, the quantity of operational frequency bands can be different.In the configuration that comprises multiple frequency bands, this frequency band selection switch can have for example SPMT (hilted broadsword is thrown more) configuration.

In the example of Figure 16 A, each duplexer 80 can allow to use community antenna (for example 416) substantially to carry out sending and receiving operation simultaneously.In Figure 16 A, the signal of reception is shown as and is sent to " Rx " path (not shown), and it can comprise for example low noise amplifier (LNA).

In the exemplary wireless device 400 of Figure 16 B, low pass filter (LPF) 82a, the 82b of two examples output that time division duplex (TDD) function can be by being connected to module 300 promote.The path of leaving filter 82a, 82b is shown as via switch 414 and is connected to antenna.In this TDD configuration, can be from out one or more Rx path of switch 414.Therefore, switch 414 can be used as band selector (for example, herein between described high frequency band and low-frequency band) and Tx/Rx (TR) switch.

In the exemplary wireless device 400 shown in Figure 16 A and Figure 16 B, exemplary module 300 is shown as and comprises PA (50a, 50b) and match circuit (60a, 60b) separately thereof, regulating circuit (102a, 102b) and coupled section (70a, 70b).In certain embodiments, the module 300 of Figure 16 A can comprise duplexer 80a, some or all in 80b and switch 414.In certain embodiments, the module 300 of Figure 16 B can comprise filter 82a, some or all in 82b and switch 414.

Many other wireless device configuration can be used one or more feature described herein.For example, wireless device needs not be multiband equipment.In another example, wireless device can comprise the extra antenna such as diversity antenna, and such as the extra connection features of Wi-Fi, bluetooth and GPS.

This is in the background of E-UTRA (the general land wireless access of evolution) operational frequency bands has described various examples.This frequency band can comprise the frequency band of listing in table 3.

Operational frequency bands	Frequency band (MHz)
		1	2，100
2	1,900
		3	1,800
4	1,700
		5	850
6	800
		7	2,600
8	900
		9	1,700
10	1,700
		11	1,500
12	700
		13	700
14	700

17	700
		18	800
19	800
		20	800
21	1,500
		22	3,500
23	2,000
		24	1,600
25	1,900
		26	850
27	800
		28	700
29	800
		30	2,300
33	2，100
		34	2，100
35	1,900
		36	1,900
37	1,900
		38	2,600
39	1,900
		40	2,300
41	2,500
		42	3,500
43	3,700
		44	700

Table 3

Will be understood that, each example bands of listing in table 3 can comprise one or more frequency ranges.For example, FDD frequency band can be associated with transmit frequency range and receive frequency range.For TDD frequency band, given frequency range can operate both by convenient sending and receiving.Will be understood that, one or more features of the present disclosure can realize in other frequency band mark convention.

Unless context is in addition requirement clearly, runs through whole specification and claim, word " comprises " and should be interpreted as " comprising " etc. the implication of inclusive, and the implication of nonexcludability or exhaustive; That is to say, be interpreted as the implication of " including, but are not limited to ".As normally used here, word " couples " and refers to two or more elements that can directly connect or connect by one or more intermediary element.In addition, in the time using in this application, the word of word " herein ", " above ", " below " and the similar meaning should refer to the application's entirety, and not this Applicant's Abstract graph any specific part.As context allow, in embodiment above, use odd number or plural number word also can comprise respectively plural number or odd number.Word "or" is during with reference to the list of two or more, and this word covers the whole following explanation of this word: in list any, any combination of the item in list whole and list.

The detailed description above of embodiments of the invention be not intended to be exhaustive or limit the invention to disclosed precise forms above.If various equivalent modifications is by understanding, although described for illustrative purposes specific embodiments of the invention and example in the above, various equivalent modifications are possible within the scope of the invention.For example, although process or square frame to present to definite sequence, alternative embodiment can have the routine of the step of different order, or adopts the system of the square frame with different order, and can delete, moves, adds, segments, combines and/or revise some processing or square frame.Can realize each in these processing or square frame with various different modes.In addition, carry out although processing or square frame are shown as serial sometimes, alternatively, these processing or square frame can walk abreast and carry out, or can carry out at different time.

Here the instruction of the present invention providing can be applied to other system, not necessarily above-described system.Can and move so that further embodiment to be provided in conjunction with the element of above-described various embodiment.

Although described some embodiment of the present invention, these embodiment only present by example, and are not intended to limit the scope of the present disclosure.In fact, new method described herein and system can be implemented with various other forms; In addition, can make with the various omissions of the form of method and system described herein, alternative and change, and not deviate from spirit of the present disclosure.Claims and equivalent intention thereof cover this form or the modification that fall in the scope of the present disclosure and spirit.

Claims

1. radio frequency (RF) circuit, comprising:

The first path, is configured to transmit a RF signal at the first frequency band;

The second path, is configured to transmit the 2nd RF signal at the second frequency band;

Power detector, comprise and be configured to detect the first coupler along the power in the first path, this power detector further comprises and is configured to detect the second coupler along the power in the second path, and this first coupler is connected with daisy-chain configuration with this second coupler; And

Regulating circuit, realizes along at least one in described the first path and the second path, and this regulating circuit is configured to the frequency-response characteristic being associated from power detector to move to different frequency ranges.

2. RF circuit as claimed in claim 1, wherein said regulating circuit is the part in the second path.

3. RF circuit as claimed in claim 2, each in wherein said the first path and the second path comprises power amplifier (PA), is connected to output matching network and the corresponding power coupler of PA, and described the second path is further included in the regulating circuit of realizing between output matching network and the second power coupler.

4. RF circuit as claimed in claim 3, wherein said regulating circuit is included in the inductance of realizing between output matching network and the second power coupler.

5. RF circuit as claimed in claim 4, wherein said inductance comprises inductor.

6. RF circuit as claimed in claim 4, wherein said regulating circuit further comprises the electric capacity being connected in series with described inductance.

7. RF circuit as claimed in claim 6, wherein said electric capacity comprises capacitor.

8. RF circuit as claimed in claim 3, wherein said output matching network comprises the coupling inductance that is connected to PA output, and is connected to the shunt capacitance of the output of coupling inductance.

9. RF circuit as claimed in claim 1, wherein said frequency-response characteristic comprises the trap in the power spectrum being associated with power detector.

10. RF circuit as claimed in claim 1, wherein said the first frequency band comprises E-UTRA frequency band B7, B38 or B40.

11. as the RF circuit of claim 10, and wherein said the second frequency band comprises E-UTRA frequency band B18 or B8.

12. as the RF circuit of claim 11, and wherein said different frequency range comprises the first or second untapped scope in path.

13. as the RF circuit of claim 12, and wherein said different frequency range is included in the frequency range between E-UTRA frequency band B8 and B4.

14. RF circuit as claimed in claim 9, wherein said regulating circuit is configured to trap to move to lower frequency.

15. as the RF circuit of claim 14, and the lower frequency that wherein said trap moves to is between the frequency being associated with the first frequency band and the second frequency band.

16. 1 kinds of radio frequencies (RF) module, comprising:

Base plate for packaging, is configured to hold multiple parts; And

Realize the RF circuit on described base plate for packaging, this RF circuit comprises the first path that is configured to transmit at the first frequency band a RF signal, this RF circuit also comprises the second path that is configured to transmit at the second frequency band the 2nd RF signal, this RF circuit also comprises power detector, this power detector has first coupler of the detection of being configured to along the power in the first path, with be configured to detect the second coupler along the power in the second path, this first coupler is connected with daisy-chain configuration with this second coupler, this RF circuit also comprises along the regulating circuit of at least one realization in described the first path and the second path, this regulating circuit is configured to the frequency-response characteristic being associated from power detector to move to different frequency ranges.

17. as the RF module of claim 16, and wherein said RF module is power amplifier module, thus the output that the output that described the first path comprises the first power amplifier (PA) and described the second path comprise the 2nd PA.

18. as the RF module of claim 17, and wherein said the first and second PA both realize on semiconductor chip.

19. 1 kinds of radio frequencies (RF) equipment, comprising:

Transceiver, is configured to processing RF signals;

With the antenna of this transceiver communications, the transmission of the RF signal that this antenna configuration is convenient amplification; And

Be connected to power amplifier (PA) module of this transceiver, this PA block configuration is to generate the RF signal amplifying, this PA module comprises the first path that is configured to transmit at the first frequency band a RF signal, this PA module also comprises the second path that is configured to transmit at the second frequency band the 2nd RF signal, this PA module also comprises power detector, this power detector has first coupler of the detection of being configured to along the power in the first path, with be configured to detect the second coupler along the power in the second path, this first coupler is connected with daisy-chain configuration with this second coupler, this PA module also comprises along the regulating circuit of at least one realization in described the first path and the second path, this regulating circuit is configured to the frequency-response characteristic being associated from power detector to move to different frequency ranges.

20. as the RF equipment of claim 19, and wherein this RF equipment comprises wireless device.

21. 1 kinds of radio frequencies (RF) circuit, comprising:

The first circuit, has the frequency response that comprises the feature in selected frequency range;

Second circuit, is coupled to this first circuit, thereby described feature at least a portion of described frequency response couples owing to this; And

Regulating circuit, is configured to this feature to remove from selected frequency range.

22. as the RF circuit of claim 21, and wherein said feature is moved to lower frequency.

23. 1 kinds for operating the method for radio frequency (RF) equipment, and the method comprises:

Detect along the first path in daisy-chain configuration and the power in the second path, this first path is configured to transmit a RF signal at the first frequency band, and this second path is configured to transmit the 2nd RF signal at the second frequency band; And

Regulate at least one in this first path and the second path, so that the frequency-response characteristic being associated from power detection is moved to different frequency ranges.

24. 1 kinds for operating the method for radio frequency (RF) equipment, and the method comprises:

Couple the first circuit and second circuit, this first circuit has the frequency response that comprises the feature in selected frequency range, and this feature at least a portion of this frequency response couples owing to this; And

Regulate this second circuit so that this feature is removed from selected frequency range.