Method for processing a carrier aggregation signal

Abstract

To optimize the trade-off between multiplexer cost and performance related to a multiplexer such as a duplexer, a quadplexer, and a hexaplexer.SOLUTION: A quadplexer 20'' includes a plurality of acoustic wave filters coupled to one common node. One first acoustic wave filter includes a plurality of acoustic wave resonators of a first type, and one series acoustic wave resonator of a second type coupled between the plurality of acoustic wave resonators of the first type and the common node. The plurality of acoustic wave resonators of the first type are a plurality of surface acoustic wave resonators, and the one series acoustic wave resonator of the second type is one bulk acoustic wave resonator.SELECTED DRAWING: Figure 2C

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present disclosure relates to an acoustic wave filter.

[0002] CROSS-REFERENCE TO PRIORITY APPLICATIONS This application is a joint venture of "Hybrid SAW / BAW Multiplier" filed on October 28, 2016. U.S. Provisional Patent Application No. 62 / 414,253, filed November 23, 2016, entitled “LEXA” A US patent application entitled "Hybrid Surface and Bulk Acoustic Wave Multiplexer" was filed in Provisional Patent Application No. 62 / 426,104, and the application filed on November 23, 2016, A provisional patent was issued for "Acoustic Wave Filters Including Resonant Surface Wave Resonators and Bulk Acoustic Wave Resonators" The present application claims the benefit of priority from application Ser. No. 62 / 426,083. The disclosure of which is incorporated herein by reference in its entirety. [Background technology]

[0003] An acoustic wave filter is a device that includes multiple resonators arranged to filter radio frequency signals. Examples of acoustic wave filters include surface acoustic wave (SAW) filters and bulk acoustic wave (BWA) filters. Thin-film piezoelectric resonator (FBAR) filters are a type of BAW filter. Here is an example.

[0004] Acoustic wave filters can be implemented in radio frequency electronic systems. The filters in the radio frequency front end of the handset may include acoustic wave filters. The acoustic wave filters can be arranged as a duplexer. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] US Patent Application Publication No. 2009 / 0009263(A1) [Patent Document 2] US Patent Application Publication No. 2008 / 0042778(A1) [Patent Document 3] US Patent Application Publication No. 2013 / 0127565(A1) Summary of the Invention

[0006] Each of the claimed innovations has several aspects, each of which is Not just one of the features is responsible for the desired attribute. Without further ado, a brief summary of some prominent features of the present disclosure is provided below.

[0007] One aspect of the present disclosure is a first acoustic wave filter coupled to a common node, and a second acoustic wave filter arranged in a first direction. a plurality of surface acoustic wave resonators; and a common node coupled between the surface acoustic wave resonators and the common node. and a series bulk acoustic wave resonator.

[0008] The surface acoustic wave resonator is a series of one surface acoustic wave resonator connected in series with one series bulk acoustic wave resonator. The series surface acoustic wave resonator may include a one-port resonator. The surface acoustic wave resonator may be a double mode surface acoustic wave resonator.

[0009] The first acoustic wave filter includes more than twice as many surface acoustic wave resonators as bulk acoustic wave resonators. The surface acoustic wave resonators may be configured to implement at least 70% of the resonators of the first acoustic wave filter. The surface acoustic wave resonators may implement at least 80% of the resonators of the first acoustic wave filter. That's fine.

[0010] The in-line bulk acoustic wave resonator may be coupled between all the surface acoustic wave resonators of the first acoustic wave filter and a common node. The surface acoustic wave resonator may include at least five resonators.

[0011] The first acoustic wave filter may further include a shunt bulk acoustic wave resonator coupled to the common node. The shunt bulk acoustic wave resonator may be coupled to the surface acoustic wave resonator via the in-line bulk acoustic wave resonator.

[0012] The second acoustic wave filter may include a second surface acoustic wave resonator and a second in-line bulk acoustic wave resonator coupled between the second surface acoustic wave resonator and a common node. The second acoustic wave filter may include one or more of the appropriate characteristics of the first acoustic wave filter.

[0013] The filter assembly may further include at least two additional acoustic wave filters coupled to the common node. The filter assembly may further include at least four additional acoustic wave filters coupled to the common node. The filter assembly may further include at least six additional acoustic wave filters coupled to the common node.

[0014] The filter assembly may be arranged as a tripler. The filter assembly may be arranged as a quadruplexer. The filter assembly may be arranged as a pentaplexer. The filter assembly may be arranged as a hexaplexer. The filter assembly may be arranged as a heptaplexer. The filter assembly may be arranged as an octaplexer.

[0015] The common node may be an antenna node.​​​​​​​​​​​​​

[0016] Another aspect of the present disclosure is a multiplexer including four surface acoustic wave filters coupled to a common node. The four surface acoustic wave filters include a first surface acoustic wave filter including a plurality of surface acoustic wave resonators, and one series bulk acoustic wave resonator coupled between the surface acoustic wave resonator and the common node. Including.

[0017] The multiplexer may be arranged as a quadplexer. The multiplexer can be arranged as a pentaplexer. The multiplexer can be arranged as a hexaplexer. The multiplexer can be arranged as a heptaplexer. The multiplexer may be arranged as an octaplexer. The multiplexer can be arranged as a pentaplexer. The multiplexer can be arranged as a hexaplexer. The multiplexer can be arranged as a hexaplexer. The multiplexer can be arranged as a heptaplexer. The multiplexer can be arranged as an octaplexer. The multiplexer may be arranged as an octaplexer.

[0018] The surface acoustic wave resonator may include a series of surface acoustic wave resonators in series with one series bulk acoustic wave resonator. The series surface acoustic wave resonator may be a one-port resonator. The series surface acoustic wave resonator may be a double-mode surface acoustic wave resonator. The series surface acoustic wave resonator may be a one-port resonator. The series surface acoustic wave resonator may be a double-mode surface acoustic wave resonator. The series surface acoustic wave resonator may be a double-mode surface acoustic wave resonator.

[0019] The surface acoustic wave resonator may implement at least 70% of the resonators of the first surface acoustic wave filter. The surface acoustic wave resonator may implement at least 80% of the resonators of the first surface acoustic wave filter. At least 70% of the resonators of the multiplexer may be surface acoustic wave resonators. At least 80% of the resonators of the multiplexer may be surface acoustic wave resonators. At least 80% of the resonators of the multiplexer may be surface acoustic wave resonators.

[0020] The series bulk acoustic wave resonator may be coupled between all surface acoustic wave resonators of the first surface acoustic wave filter and the common node. The surface acoustic wave resonator may include at least five resonators. Including at least five resonators. Including at least five resonators.

[0021] The first elastic wave filter may further include a shunt bulk elastic wave resonator coupled to a common node. The shunt bulk elastic wave resonator may be coupled to the surface wave resonator via a series bulk elastic wave resonator.

[0022] The four elastic wave filters may include a second elastic wave filter including a plurality of second surface elastic wave resonators and a second series bulk elastic wave resonator coupled between the second surface elastic wave resonator and the common node. The second elastic wave filter may include one or more appropriate characteristics of the first elastic wave filter. The four elastic wave filters may also include a third elastic wave filter including a plurality of third surface elastic wave resonators and a third series bulk elastic wave resonator coupled between the third surface elastic wave resonator and the common node. The third elastic wave filter may include one or more appropriate characteristics of the first elastic wave filter. The four elastic wave filters may also include a fourth elastic wave filter including a plurality of fourth surface elastic wave resonators and a fourth series bulk elastic wave resonator coupled between the fourth surface elastic wave resonator and the common node. The fourth elastic wave filter may include one or more appropriate characteristics of the first elastic wave filter.

[0023] Another aspect of the present disclosure is a packaged module including one or more first dies and one second die. The one or more first dies include a first group of surface elastic wave resonators and a second group of surface elastic wave resonators. The first group of surface elastic wave resonators is included in a first elastic wave filter coupled to a common node. The second die includes one series bulk elastic wave resonator. The second group of surface elastic wave resonators and the series bulk elastic wave resonator are included in a second elastic wave filter coupled to a common node. The series bulk elastic wave resonator is between the second group of surface elastic wave resonators and the common node. is coupled to.

[0024] The package-like module may further include a multi-throw switch coupled to the first filter and the second filter. The multi-throw switch may have a single-throw coupled to a common mode. Alternatively, the multi-throw switch may have a first throw coupled to a first SAW filter and a second throw coupled to a second SAW filter. In some examples, the package-like module may further include a power amplifier configured to provide a radio frequency signal to at least one of the first SAW filter or the second SAW filter via the multi-throw switch. In some examples, the package-like module may further include a power amplifier. The package-like module may include one or more suitable features of the SAW filters and / or multiplexers described herein.

[0025] In some examples, the package-like module may further

[0026] Another aspect of the present disclosure is a wireless communication device including an antenna configured to receive a radio frequency signal and a multiplexer in communication with the antenna. The multiplexer includes four SAW filters coupled to a common node. The four SAW filters include a first SAW filter including a plurality of surface acoustic wave resonators and one series bulk acoustic wave resonator coupled between the surface acoustic wave resonator and the common node. The wireless communication device may be configured as a mobile phone.

[0027] The wireless communication device may further include a frequency multiplexing circuit coupled between the common node and the antenna. The frequency multiplexing circuit may be a diplexer or a tripler. The multiplexer includes four SAW filters coupled to a common node. The four SAW filters include a first SAW filter including a plurality of surface acoustic wave resonators and one series bulk acoustic wave resonator coupled between the surface acoustic wave resonator and the common node. The wireless communication device may be configured as a mobile phone. The wireless communication device may further include a frequency multiplexing circuit coupled between the common node and the antenna. The frequency multiplexing circuit may be a diplexer or a tripler.

[0028] The wireless communication device can be configured as a mobile phone.

[0029] The wireless communication device may further include a frequency multiplexing circuit coupled between the common node and the antenna. The frequency multiplexing circuit may be a diplexer or a tripler. The frequency multiplexing circuit may be a diplexer or a tripler. It may be a multiplexer.

[0030] The wireless communication device may further include an antenna switch coupled between the common node and the antenna. It may be included.

[0031] The radio frequency signal may be a carrier aggregation signal.

[0032] The antenna may be a primary antenna. The antenna may be a diversity antenna. Each of the four surface acoustic wave filters may be configured as a receiving filter that communicates with the diversity antenna. It may be. It may be configured.

[0033] The wireless communication device may include any one of the surface acoustic wave filters described herein, any one of the multiplexers described herein, any one of the package modules described herein, or one or more suitable features of any combination of these. It may include. It may include one or more suitable features of any combination of these.

[0034] Another aspect of the present disclosure is a filter assembly including a first surface acoustic wave filter having a passband and coupled to a common node. The filter assembly also includes a second surface acoustic wave filter coupled to the common node. The second surface acoustic wave filter includes a plurality of surface acoustic wave resonators of a first type and one series surface acoustic wave resonator of a second type coupled between the plurality of surface acoustic wave resonators of the first type and the common node. The one series surface acoustic wave resonator of the second type has a higher quality factor than the plurality of surface acoustic wave resonators of the first type in the passband of the first surface acoustic wave filter. It includes. It includes. It includes. The one series surface acoustic wave resonator of the second type has a higher quality factor than the plurality of surface acoustic wave resonators of the first type in the passband of the first surface acoustic wave filter. It has.

[0035] The plurality of elastic resonators of the first type may be a plurality of surface acoustic wave resonators, and the one series surface acoustic wave resonator of the second type may be one bulk acoustic wave resonator. The plurality of the first type... It may be. The elastic resonator may be a plurality of non-temperature compensated surface acoustic wave resonators, one of a second type in series. The acoustic wave resonator may be a temperature compensated surface acoustic wave resonator.

[0036] The first type of the plurality of acoustic wave resonators of the second acoustic wave filter include At least 70% of the resonators may be of a first type. The first die includes a series acoustic wave resonator of a second type, and a second die includes a series acoustic wave resonator of a second type. At least two of the first type of elastic resonators are connected in series with one of the second type of elastic resonators. The oscillator may be connected in series with the

[0037] The filter assembly further includes a third acoustic wave filter coupled to the common node. and a fourth acoustic wave filter coupled to the serial node. The resonator has a characteristic that the first type acoustic wave resonator has a larger noise than the first type acoustic wave resonators in the pass band of the third acoustic wave filter. A second type of series acoustic wave resonator may have a higher quality factor than a fourth acoustic wave filter. In the passband of the filter, the quality factor may be higher than that of the first type of acoustic wave resonators. do.

[0038] Another aspect of the present disclosure is a multiplexer including an acoustic wave filter. a first acoustic wave filter coupled to a common node; and three other acoustic wave filters coupled to the common node. The first acoustic wave filter includes a plurality of acoustic wave resonators of a first type. a second type of resonator coupled between the first type of resonators and a common node; The three other acoustic wave filters each have a corresponding passband. The second type of one series acoustic wave resonator is connected to the corresponding passbands of the three other acoustic wave filters. In each of the domains, it has a higher quality factor than a plurality of elastic wave resonators of the first type.

[0039] The plurality of elastic resonators of the first type may be a plurality of surface acoustic wave resonators, and the single series elastic wave resonator may be a single bulk acoustic wave resonator. The plurality of elastic resonators of the first type may be a plurality of non-temperature-compensated surface acoustic wave resonators, and the single series elastic wave resonator of the second type may be a single temperature-compensated surface acoustic wave resonator.

[0040] At least one of the three other elastic wave filters may include a plurality of second elastic wave resonators of the first type and a single second series elastic wave resonator of the second type coupled between the plurality of second elastic wave resonators of the first type and a common node.

[0041] The multiplexer may be a quadplexer. The multiplexer may further include two additional elastic wave filters coupled to a common node.

[0042] Another aspect of the present disclosure is a method for processing a carrier aggregation signal. The method includes filtering a carrier aggregation signal by a first elastic wave filter coupled to an antenna port and having a first band. The carrier aggregation signal includes a first radio frequency carrier in a first passband and a second radio frequency carrier in a second passband. The method further includes filtering the carrier aggregation signal by a second elastic wave filter coupled to the antenna port and having a second passband. The second elastic wave filter includes a plurality of elastic wave resonators of the first type and a plurality of elastic one series elastic wave resonator of a second type coupled between the wave resonator and the antenna port comprises. One series elastic wave resonator of the second type has a lower load loss than the plurality of elastic wave resonators of the first type.

[0043] The method may further include receiving a carrier aggregation signal via an antenna coupled to the antenna port. The method may further include transmitting a carrier aggregation signal via an antenna coupled to the antenna port. The method may further include coupling a first elastic wave filter and a second elastic wave filter to a common node via a multi-throw switch. Since the multi-throw switch can couple the first elastic wave filter and the second elastic wave filter to the common node, the first elastic wave filter and the second elastic wave filter are simultaneously coupled to the common node.

[0044] The plurality of elastic resonators of the first type may be a plurality of surface acoustic wave resonators, and the one series elastic wave resonator of the second type may be one bulk acoustic wave resonator. The plurality of elastic resonators of the first type may be a plurality of non-temperature compensated surface acoustic wave resonators, and the one series elastic wave resonator of the second type may be one temperature compensated surface acoustic wave resonator. The plurality of elastic resonators of the first type may be present on a different die than the one series elastic wave resonator of the second type.

[0045] For the purpose of summarizing the present disclosure, certain aspects, advantages, and novel features of this innovation have been described herein. Not all of such advantages are necessarily achieved in any particular embodiment. Thus, this innovation is one taught herein ​​​​​​​​​​​​​Advantages or a group of advantages can be embodied or implemented in a manner of achieving or optimizing without necessarily achieving other advantages taught or suggested herein. , can be embodied or implemented in a manner of achieving or optimizing.

Brief Description of the Drawings

[0046] Embodiments of the present disclosure are described by way of non-limiting examples with reference to the accompanying drawings.

[0047]

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DETAILED DESCRIPTION OF THE INVENTION

[0048] The following detailed description of certain embodiments represents various descriptions of the specific embodiments. However, the technological innovations described herein can be embodied in a number of different manners, for example, as defined and covered by the claims. In this description, in the reference drawings, the same reference numerals may indicate the same or functionally similar elements. It is understood that the elements illustrated in the drawings are not necessarily to scale. Further understood is that a given embodiment while, the technological innovations described herein can be embodied in a number of different manners, for example, as defined and covered by the claims. In this description, in the reference drawings, the same reference numerals may indicate the same or functionally similar elements. It is understood that the elements illustrated in the drawings are not necessarily to scale. Further understood is that a given embodiment can be embodied in a number of different manners, for example, as defined and covered by the claims. In this description, in the reference drawings, the same reference numerals may indicate the same or functionally similar elements. It is understood that the elements illustrated in the drawings are not necessarily to scale. Further understood is that a given embodiment In the drawings referred to in this description, the same reference numerals may indicate the same or functionally similar elements. It is understood that the elements illustrated in the drawings are not necessarily to scale. Further understood is that a given embodiment In the drawings referred to in this description, the same reference numerals may indicate the same or functionally similar elements. It is understood that the elements illustrated in the drawings are not necessarily to scale. Further understood is that a given embodiment The form may include more elements than those illustrated in the drawings and / or may include a subset of the elements illustrated in the drawings. Further, some embodiments may incorporate any suitable combination of features from two or more of the drawings. To increase cellular data bandwidth, service providers and handset manufacturers often implement carrier aggregation (CA). Here, multiple frequency bands are simultaneously used by a single handset for the purpose of data transmission and / or reception. Due to the size and cost of the handset, manufacturers are encouraged to use as few separate antennas as possible, so many CA scenarios can benefit from multiple bands sharing a single

[0049] antenna. In the case of traditional single-band (non-CA), at most two bandpass filters (one transmit filter and one receive filter, which may be referred to as a duplexer in combination) are connected to the antenna, while a CA system may include more than seven additional filters all connected to a common antenna node. According to CA specifications, these filters can be configured as quadplexers (4 filters), pentaplexers (5 filters), hexaplexers (6 filters), octaplexers (8 filters), etc. The general term used here for all of these multiple filter configurations is a multiplexer. When such a large number of filters share a common connection, each filter is subject to the interference of other filters.

[0050] In the case of traditional single-band (non-CA), at most two bandpass filters (one transmit filter and one receive filter, which may be referred to as a duplexer in combination) are connected to the antenna, while a CA system may include more than seven additional filters all connected to a common antenna node. According to CA specifications, these filters can be configured as quadplexers (4 filters), pentaplexers (5 filters), hexaplexers (6 filters), octaplexers (8 filters), etc. The general term used here for all of these multiple filter configurations is a multiplexer. For all of these multiple filter configurations, the general term used here is a multiplexer.

[0051] When such a large number of filters share a common connection, each filter is subject to the interference of other filters. ​​​​​​​​​In the passband, it is desirable to present high impedance to all other filters. This ensures that the mutual loading of all filters is minimized or kept to a minimum. In this context, "loading" refers to the increased insertion loss through a filter caused by unwanted signal dissipation and / or reflection by one or more of the other filters of the multiplexer. It is desirable that this is guaranteed. This allows the mutual loading of all filters to be reliably minimized or kept close to a minimum. In this context, "loading" refers to the increased insertion loss through a filter caused by unwanted signal dissipation and / or reflection by one or more of the other filters of the multiplexer. For example, consider a diplexer that includes two filters for two frequency bands where the connected bands X and Y share a common antenna. The diplexer can be considered as a power divider. Here, the amount of power passing through each path can be determined by the frequency-dependent impedance presented by each of the two filters. If all filters were ideal, they would each present a perfect 50-ohm antenna impedance within their respective passbands, while also presenting an open-circuit impedance within the passband of the other filter of the diplexer. In such a case, for example, a signal within frequency band X at the antenna port would receive 50 ohms through the band X filter and enter an open circuit through the band Y filter. That is, in this ideal scenario, 100% of the signal power would flow through the band X filter and 0% through the band Y. Similarly, for a signal within band Y, 100% of the power would flow through the band Y filter and 0% through the band X filter. On the other hand, if the filters are very poor, 50 ohms is presented at all frequencies and the power division is very different. In the example of band X, here a 50-ohm path is presented to the signal in both filters. Therefore, the power is split 5 through the band X filter and 5 through the band Y filter.

[0052] For example, consider a diplexer that includes two filters for two frequency bands where the connected bands X and Y share a common antenna. The diplexer can be considered as a power divider. Here, the amount of power passing through each path can be determined by the frequency-dependent impedance presented by each of the two filters. If all filters were ideal, they would each present a perfect 50-ohm antenna impedance within their respective passbands, while also presenting an open-circuit impedance within the passband of the other filter of the diplexer. In such a case, for example, a signal within frequency band X at the antenna port would receive 50 ohms through the band X filter and enter an open circuit through the band Y filter. That is, in this ideal scenario, 100% of the signal power would flow through the band X filter and 0% through the band Y. Similarly, for a signal within band Y, 100% of the power would flow through the band Y filter and 0% through the band X filter. On the other hand, if the filters are very poor, 50 ohms is presented at all frequencies and the power division is very different. In the example of band X, here a 50-ohm path is presented to the signal in both filters. Therefore, the power is split 5 through the band X filter and 5 through the band Y filter. Similarly, for a signal within band Y, 100% of the power would flow through the band Y filter and 0% through the band X filter. On the other hand, if the filters are very poor, 50 ohms is presented at all frequencies and the power division is very different. In the example of band X, here a 50-ohm path is presented to the signal in both filters. Therefore, the power is split 5 0% flows and is split so that 50% flows through the band Y filter. That is, for band X the insertion loss approximately increases by only 3 dB. In other words, this duplexer will have a loading loss of 3 dB compared to individual filters.

[0053] As can be seen, the overall loading loss increases rapidly as the number of combined filters in the multiplexer increases. For example, an octaplexer containing such non - ideal filters will have an additional 9 dB of loading loss. Real - world radio frequency ( RF) filters are not as good as the ideal filters described above with no loading loss, but do not behave as poorly as an impedance of 50 ohms in all frequency scenarios. The magnitude of the out - of - band impedance can be a relatively strong function of filter design and can also depend on the filter technology. Both surface acoustic wave (SAW) technology and bulk acoustic wave (BAW) technology are prevalently used for RF filters and both can achieve a relatively high impedance out of band. However, in head - to - head comparisons, world - class BAW

[0054] filters are generally superior to SAW filters in terms of the magnitude of the out - of - band impedance over a wide frequency span. The difference in loading loss is relatively minor for the case of a duplexer but can become increasingly important as the number of CA filters increases. For a quadruplexer, BAW filters often receive a loading loss benefit of 0.5 dB to 1.0 dB compared to their SAW filter counterparts. For hexaplexers and octaplexers ​​​​​In contrast, the difference is still significantly large.

[0055] Unfortunately, despite its high performance, the BAW filter can be associated with significant disadvantages compared to the SAW filter. That is cost. The BAW filter is generally much more difficult and expensive to manufacture than the SAW filter. Therefore, there is a substantial motivation to use SAW technology as much as possible. SAW technology is suitable for making duplexers that substantially cover the current cellular frequency band. However, for CA coupling using a quadplexer, the trade-off between cost and performance for the two technologies is not so clear.

[0056] There are ways to improve the loading loss by carefully controlling the filter topology and / or design parameters. However, ultimately, the loading loss can be limited by spurious acoustic modes resulting from the finite reflection bandwidth of the Bragg reflectors used to confine the in-band energy and the out-of-band acoustic energy radiation outside the resonator. For many scenarios where the cost / performance trade-off is somewhat ambiguous, such as for many quadplexers or pentaplexers, the existing RF switches in the cellular front-end module can be used to make what is In this case, the load loss deteriorates slightly more than that of the multiplexer with wired connection (still deteriorates more than the BAW multiplexer), but in the non-CA mode, the problem of load loss disappears. Since most of the total usage time of a given cellular handset is in the non-CA mode the performance degradation is mainly limited to the CA mode (compared to BAW), and thus it is advantageously deployed to a less expensive SAW solution in such a cellular hand set. The switchplexing solution, although sophisticated, can be considerably more difficult to implement than a permanent multiplexing solution. Furthermore, for handset manufacturers, it may also include complex and expensive calibration routines. Since CA operation is becoming common and the number of simultaneous connections is increasing, it is expected that it will be difficult for SAW technology to meet a given CA specification.

[0057] A given aspect of the present disclosure addresses the above-described problems by combining both SAW and BAW technologies in one system. Since the out-of-band impedance presented by the multiplexer can be determined mainly by one or two resonators closest to the antenna connection, these specific resonators may be made using BAW technology. According to a given embodiment, such BAW resonators may generally include 10 - 30% of the total number of resonators of a filter. Most or all of the remaining 70 - 90% of the resonators of the filter can be implemented by the less expensive SAW technology. The multiplexer may generally include 10 - 30% BAW resonators, and most or all of the remaining 70 - 90% of the resonators of the multiplexer can be SAW resonators. Thus, a given embodiment is all B % BAW resonators and most or all of the remaining 70 - 90% of the resonators of the multiplexer as SAW resonators. Therefore, a given embodiment is all B ​​​​​Despite having a load loss comparable to that of an AW solution, most is SAW content and may include a hexaplexer or octaplexer that can be achieved at a considerably lower cost. That is in some embodiments, the system includes a multiplexer having a first number of one or more BAW resonators provided near the antenna connection portion and a second number of SAW resonators provided around the antenna connection portion at a distance from the antenna connection portion. Here, the second number is larger than the first number.

[0058] Some embodiments combine all of the load loss advantages of a BAW CA multiplexer with many of the cost advantages of an SAW solution.

[0059] One aspect of the present disclosure is a filter assembly including a plurality of elastic wave filters coupled to a common node. The first elastic wave filter of the plurality of elastic wave filters includes a plurality of surface acoustic wave resonators and one bulk acoustic wave resonator arranged in series between all of the surface acoustic wave resonators of the first elastic wave filter and a common mode. One or more of the other elastic wave filters of the plurality of elastic wave filters may include a plurality of surface acoustic wave resonators coupled to the common node via one series bulk acoustic wave resonator. The bulk acoustic wave resonator is, for example, an FBAR. The first elastic wave filter may also include a shunt bulk acoustic wave resonator. The plurality of elastic wave filters can be arranged as a multiplexer such as a duplexer, triplexer, quadplexer, pentaplexer, hexaplexer, heptaplexer, octaplexer, etc.

[0060] Another aspect of the present disclosure is a multiplexer including at least four filters connected to a common node. At least one of the four filters includes at least a first type of resonator and ​ It includes a second type of resonator. Here, the second type of resonator has a lower load loss than the first type of resonator. In one of the four filters, all of the first type of resonators are coupled to a common node via a second type of series resonator. The second type of resonator may be a BAW resonator such as FBAR, and the first type of resonator may be a SAW resonator.

[0061] The antenna is configured to receive a radio frequency signal. The multiplexer communicates with the antenna. The multiplexer includes four elastic wave filters coupled to a common node. The first elastic wave filter of the four elastic wave filters includes a plurality of surface acoustic wave resonators and one bulk acoustic wave resonator in series between the surface acoustic wave resonator and the common node. A frequency multiplexing circuit such as a diplexer or a triplexer, and / or an antenna switch may be coupled between the multiplexer and the antenna. The radio frequency signal may be a carrier aggregation signal. In some applications, the antenna may be a diversity antenna, and the four filters may be receive filters. The multiplexer may include one or more additional elastic wave filters coupled to the common node.

[0062] Another aspect of the present disclosure is a packaged module including one or more first dies and one second die. The one or more first dies include a plurality of SAW resonators. The one second die includes one BAW resonator. The elastic wave filter coupled to the common node is mounted on the one or more first dies and the one second die via a plurality of elastic wave resonators. The first elastic wave filter of the elastic wave filter includes a plurality of SAW resonators and between the SAW resonator includes one BAW resonator in series therebetween. The plurality of surface acoustic wave filters can be arranged as a multiplexer such as a quadplexer, pentaplexer, hexaplexer, octaplexer, etc. The package-like module may also include one or more of a power amplifier, a band selection switch, and an antenna switch.

[0063] Another aspect of the present disclosure is a wireless communication device including an antenna and a multiplexer. The antenna is configured to filter a radio frequency signal. The multiplexer communicates with the antenna. The multiplexer includes four surface acoustic wave filters coupled to a common node. The first surface acoustic wave filter of the four surface acoustic wave filters includes a plurality of surface acoustic wave resonators and one bulk acoustic wave resonator in series between the surface acoustic wave resonator and the common node. A frequency multiplexing circuit such as a diplexer or a triplexer, and / or an antenna switch may be coupled between the multiplexer and the antenna. The radio frequency signal may be a carrier aggregation signal. In some applications, the antenna may be a diversity antenna, and the four filters may be receive filters. The multiplexer may include one or more additional surface acoustic wave filters coupled to the common node. FIG. 1 is a schematic diagram of a quadplexer 10. The quadplexer 10 includes four filters connected to a common node COM. The common node COM is also referred to as a common port. As an example, the quadplexer 10 includes a first transmit filter 12, a first receive filter 14, a second transmit filter 16, and a second receive filter 18. The quadplexer 10 Each filter can be a band - pass filter as exemplified. Quadplexer One or more of the filters 10 may be acoustic wave filters. All of the filters of the quadplexer 10 may be acoustic wave filters. Any of the filters of the quadplexer 10 may include two types of acoustic wave resonators according to the principles and advantages described herein. For example any of the filters of the quadplexer 10 may include a plurality of SAW resonators and one or more BAW resonators according to the principles and advantages described herein.

[0064] FIG. 2A is a schematic diagram of a plurality of acoustic wave resonators of a quadplexer 20 according to an embodiment. The quadplexer 20 is an example of the acoustic wave device 10 of FIG. 1. The multiplexer can be implemented according to the appropriate principles and advantages described with reference to FIG. 2A. In FIG. 2A, a plurality of acoustic wave resonators are implemented in each filter of the quadplexer 20. The exemplary acoustic wave resonators are each one - port resonators. Such resonators include interdigital transducer electrodes, and the input and output portions of the resonator are the opposing bus bars of the interdigital transducer electrodes. In FIG. 2A, each filter of the quadplexer 20 has a plurality of acoustic wave resonators implemented therein. The exemplary acoustic wave resonators are each one - port resonators. Such resonators include interdigital transducer electrodes, and the input and output portions of the resonator are the opposing bus bars of the interdigital transducer electrodes. Each of the exemplary acoustic wave resonators is a one - port resonator. Such a resonator includes interdigital transducer electrodes, and the input and output portions of the resonator are the opposing bus bars of the interdigital transducer electrodes. include interdigital transducer electrodes, and the input and output portions of the resonator are the opposing bus bars of the interdigital transducer electrodes.

[0065] The first acoustic wave filter of the quadplexer 20 includes SAW resonators 21, 22, 23, and 2 4, and BAW resonator 25. The second acoustic wave filter of the quadplexer 20 includes SA W resonators 31, 32, 33, and 34, and BAW resonator 36. The third acoustic wave filter of the quadplexer 2 0 includes SAW resonators 41, 42, 43, 44, and 45, and BAW reso nators 46 and 47. The fourth acoustic wave filter of the quadplexer 20 includes SAW reson ​​​The amplifier includes transducers 51, 52, 53, 54 and 55, and a BAW resonator 56.

[0066] As shown in FIG. 2A, the series SAW resonator in the acoustic wave filter is a series BAW resonator. The common node of the quadplexer can be coupled via a cascade. As shown in the figure, the series SAW resonators and the shunt SAW resonators in the acoustic wave filter are The BAW resonators can be coupled to the common node of the quadplexer via a series of BAW resonators. A also includes at least four or at least five SAW resonators connected through a series BAW resonator. 4 shows that the first and second inputs can be coupled to a common node of the quadplexer via a common bus.

[0067] In the acoustic wave filter illustrated in FIG. 2A, all the SAW resonators of each acoustic wave filter are , and are coupled to a common node via a series BAW resonator of the corresponding acoustic wave filter. This reduces the loading of common nodes compared to acoustic wave filters that contain only multiple SAW resonators. As also shown in FIG. 2A, multiplexers and / or acoustic wave filters can be used. At least 70% of the resonators of the filter are SAW resonators, and the multiplexer and / or Other resonators of the acoustic wave filter may be implemented by BAW technology. By using mostly SAW resonators to achieve this, such acoustic wave filters can be These can be substantially cheaper than acoustic wave filters implemented entirely or entirely with BAW resonators.

[0068] FIG. 2A and some other embodiments such as FIGS. 4 to 6 show SAW resonators and BAW While an example of a multiplexer including a resonator is illustrated, any suitable principle described herein may be used. The principles and advantages can be implemented by two different suitable types of resonators. then, the filter of the multiplexer may include a plurality of resonators of a first type and a single series resonator of a second type coupled between the plurality of resonators of the first type and a common node of the multiplexer.

[0069] The resonator of the second type may have a lower loading loss than the resonator of the first type. Such loading loss may refer to loss associated with unwanted signal dissipation and / or reflection caused by one or more of the other filters of the multiplexer and / or an increase in insertion loss through one filter that causes an increase in insertion loss through one filter.

[0070] The resonator of the second type may have a higher out-of-band rejection than the elastic wave resonator of the first type. The resonator of the second type may have a higher out-of-band quality factor than the resonator of the first type. For example, the resonator of the second type may have a higher quality factor than the plurality of elastic wave resonators of the first type in the passband of at least one other filter of the multiplexer. The higher out-of-band quality factor allows the resonator of the second type to provide a greater out-of-band rejection due to lower energy dissipation than the resonator of the first type. In a given application, the resonator of the second type may have a higher quality factor than the plurality of elastic wave resonators of the first type in the corresponding passbands of all other filters of the multiplexer. The quality factor may represent the ratio of stored power to dissipated power. The quality factor may be frequency dependent.

[0071] The elastic wave resonator of the second type is more expensive than the elastic wave resonator of the first type and can achieve good out-of-band performance. Implementing two types of resonators in the elastic wave filter As a result, out-of-band performance and cost are balanced in a solution with relatively low cost and relatively high performance. in the reduction.

[0072] In the multiplexer 20 of FIG. 2A, the first type of resonator is a SAW resonator, and the second type of resonator is a BAW resonator. Another example of a multiplexer having two different types of resonators is described with reference to FIGS. 2B and 2C.

[0073] FIG. 2B is a schematic diagram of a plurality of elastic wave resonators of a quad multiplexer 20' according to an embodiment. The quad multiplexer 20' includes two types of SAW resonators, namely SAW of type A and SAW of type B. The quad multiplexer 20' is similar to the quad multiplexer 20 of FIG. 2A, except that a plurality of SAW resonators of a second type are implemented in the quad multiplexer 20' instead of the plurality of BAW resonators of the quad multiplexer 20. The second type of SAW resonator, namely SAW of type B, has advantages similar to those of the BAW resonator compared to the first type of SAW resonator, namely SAW of type A. For example, the second type of SAW resonator, namely SAW of type B, may have lower loading loss and / or better out-of-band rejection and / or higher out-of-band quality factor than the first type of SAW resonator, namely SAW of type A. On the other hand, the second type of SAW resonator, namely SAW of type B, may be more expensive to implement than the first type of SAW resonator, namely SAW of type A. Therefore, the filter topology shown in FIG. 2B can balance cost and performance to provide a solution with relatively low cost and relatively high performance.

[0074] In some examples, a first type of SAW resonator, i.e., type A SAW, may be used as a standard SAW resonator, and a second type of SAW resonator, i.e., type B SAW, may be used as a temperature-compensated SAW (TCSAW) resonator. The standard SAW resonator may be non-temperature-compensated. The TCSAW resonator may include a temperature-compensation layer having a positive frequency temperature coefficient. For example, the TC SAW resonator may be obtained by adding silicon dioxide covering the IDT electrodes to the standard SAW resonator.

[0075] According to a given embodiment, a second type of SAW resonator, i.e., type B SAW, may be a SAW resonator having equivalent or superior characteristics compared to a BAW resonator having superior temperature characteristics compared to a typical BAW resonator. Such a second type of SAW resonator may have a relatively high quality factor, a relatively low frequency temperature coefficient, and a relatively high heat dissipation. This second type of SAW resonator may have a multilayer substrate in which the quality factor may increase and the frequency temperature coefficient may decrease compared to the standard SAW resonator. The second SAW resonator may include an IDT electrode on a multilayer substrate covering a functional layer ( e.g., SiO2, SiON, or Ta2O5) covering a high-speed layer (e.g., sapphire, alumina, SiN, or AlN) covering a support substrate (e.g., silicon substrate). For example, the piezoelectric layer (e.g., lithium niobate (L N) or lithium tantalate (LT)) covering the functional layer. For example, the second type of SAW resonator may include an IDT electrode on LT / SiO2 / AlN / Si substrate. For example, the second type of SAW resonator may be a Murata IHP (Incredible High Performance) SAW resonator. The second type of SAW resonator in this quadplexer 20' enables the first in the quadplexer 20. le High Performance) SAW resonator. The second type of SAW resonator in this quadplexer 20' enables the first in the quadplexer 20. ​The SAW resonator of one type can be a non-temperature-compensated SAW resonator or a temperature-compensated SAW resonator. It is possible.

[0076] The first elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 21’, 22’, 23’ and 24’ of the first type and one SAW resonator 25’ of the second type. It includes a plurality of SAW resonators 21’, 22’, 23’ and 24’ of the first type and one SAW resonator 25’ of the second type. The second elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 31’, 32’, 33’ and 34’ of the first type and one SAW resonator 36’ of the second type. The third elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 41’, 42’, 43’, 44’ and 45’ of the first type and a plurality of SAW resonators 46’ and 47’ of the second type. The fourth elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type. It includes a plurality of SAW resonators 31’, 32’, 33’ and 34’ of the first type and one SAW resonator 36’ of the second type. The third elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 41’, 42’, 43’, 44’ and 45’ of the first type and a plurality of SAW resonators 46’ and 47’ of the second type. The fourth elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type. The third elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 41’, 42’, 43’, 44’ and 45’ of the first type and a plurality of SAW resonators 46’ and 47’ of the second type. The fourth elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type. It includes a plurality of SAW resonators 41’, 42’, 43’, 44’ and 45’ of the first type and a plurality of SAW resonators 46’ and 47’ of the second type. The fourth elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type. The fourth elastic wave filter of the quadplexer 20’ includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type. It includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type. It includes a plurality of SAW resonators 51’, 52’, 53’, 54’ and 55’ of the first type and one SAW resonator 56’ of the second type.

[0077] FIG. 2C is a schematic diagram of a plurality of elastic wave resonators of the quadplexer 20’’ according to an embodiment. The quadplexer 20’’ includes two types of resonators, that is, resonators of type A and resonators of type B. The quadplexer 20’’ is similar to the quadplexer 20 in FIG. 2A and the quadplexer 20’ in FIG. 2B, but is different in that the two types of resonators of the quadplexer 20’ can be any suitable type of resonator. The second type of resonator can have the same advantages for the first type of resonator as the BAW resonator has for the SAW resonator. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. It includes two types of resonators, that is, resonators of type A and resonators of type B. The quadplexer 20’’ is similar to the quadplexer 20 in FIG. 2A and the quadplexer 20’ in FIG. 2B, but is different in that the two types of resonators of the quadplexer 20’ can be any suitable type of resonator. The second type of resonator can have the same advantages for the first type of resonator as the BAW resonator has for the SAW resonator. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. It includes two types of resonators, that is, resonators of type A and resonators of type B. The quadplexer 20’’ is similar to the quadplexer 20 in FIG. 2A and the quadplexer 20’ in FIG. 2B, but is different in that the two types of resonators of the quadplexer 20’ can be any suitable type of resonator. The second type of resonator can have the same advantages for the first type of resonator as the BAW resonator has for the SAW resonator. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. The quadplexer 20’’ is similar to the quadplexer 20 in FIG. 2A and the quadplexer 20’ in FIG. 2B, but is different in that the two types of resonators of the quadplexer 20’ can be any suitable type of resonator. The second type of resonator can have the same advantages for the first type of resonator as the BAW resonator has for the SAW resonator. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. The quadplexer 20’’ is similar to the quadplexer 20 in FIG. 2A and the quadplexer 20’ in FIG. 2B, but is different in that the two types of resonators of the quadplexer 20’ can be any suitable type of resonator. The second type of resonator can have the same advantages for the first type of resonator as the BAW resonator has for the SAW resonator. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. The second type of resonator can have the same advantages for the first type of resonator as the BAW resonator has for the SAW resonator. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. For example, the second type of resonator can have lower load loss, better out-of-band rejection, higher out-of-band quality factor, etc., than the first type of resonator, or any combination of these. It may have any of the above-described advantages regarding an appropriate combination. On the other hand, the second type of resonator may be more expensive to implement than the first type of resonator. Therefore, the filter topology shown in FIG. 2C can balance cost and performance to provide a relatively low-cost and relatively high-performance solution.

[0078] The first filter of the quadplexer 20’’ includes a plurality of resonators 21’’, 2 2’’, 23’’ and 24’’ of the first type and one resonator 25’’ of the second type. The second filter of the quad plexer 20’’ includes a plurality of resonators 31’’, 32’’, 33’’ and 34’’ of the first type and one resonator 36’’ of the second type. The third filter of the quadplexer 20’’ includes a plurality of resonators 41’’, 42’’, 43’’ , 44’’ and 45’’ of the first type and a plurality of resonators 46’’ and 47’’ of the second type. The fourth filter of the quadplexer 20’’ includes a plurality of resonators 51’’, 52 ’’, 53’’, 54’’ and 55’’ of the first type and one resonator 56’’ of the second type . All of the illustrated resonators of the quadplexer 20’’ may be surface acoustic wave resonators.

[0079] FIG. 3 is a schematic diagram of a hexaplexer 60. The hexaplexer 60 includes six filters connected to a common node COM. As illustrated, the hexaplexer 60 includes a first transmission filter 12, a first reception filter 14, a second transmission filter 16, a second reception filter 18, a third transmission filter 62 and a third reception filter 64. Each filter of the hexaplexer 60 may be a band-pass filter as illustrated. The filters of the hexaplexer 60 ​One or more may be an elastic wave filter. The filters of the hexaplexer 60 may be elastic wave filters. Any of the filters of the quadplexer 60 may include two types of elastic wave resonators according to the principles and advantages described herein. For example, any of the filters of the quadplexer 60 may include a plurality of SAW resonators and one or more BAW resonators according to the principles and advantages described herein.

[0080] FIG. 4 is a schematic diagram of the elastic wave resonators of the hexaplexer 70 according to one embodiment. The hexaplexer 70 is an example of the hexaplexer 60 of FIG. 3. As illustrated in FIG. 4, each filter of the hexaplexer 70 is implemented by elastic wave resonators. The multiplexer can be implemented according to the appropriate principles and advantages described with reference to FIG. 4. A particular filter of such a multiplexer can be implemented for the design specifications for a given application. The elastic wave filters of FIG. 4 show some examples of such filters.

[0081] The first elastic wave filter of the hexaplexer 70 includes a BAW resonator 71 and SAW resonators 71, 72, 73, 74, 75, 76, 77, 78, and 79. The first elastic wave filter may be a transmission filter such as the first transmission filter 12 of FIG. 3. These SAW resonators account for 8 / 9 of the elastic wave resonators of the first elastic wave filter.

[0082] The second elastic wave filter of the hexaplexer 70 includes a BAW resonator 81 and SAW resonators 82 and 83. The second elastic wave filter may be a reception filter such as the first reception filter 14 of FIG. 3. The illustrated SAW resonator 83 is a double mode SAW (DMS) resonator. ​​​​​​​​​​​​​​ Yes, and this is also referred to as a coupled resonator filter (CRF). The DMS resonator can be implemented in a low-power filter such as a receiving filter. The DMS resonator typically does not handle relatively high power. Therefore, there must be at least one series elastic wave resonator that protects the DMS resonator from the relatively high power present at the common node COM that can be an antenna node. The third elastic wave filter of the hexaplexer 70 includes a BAW resonator 91 and SAW resonators 92, 93, 94, 95, 96, 97, and 98. The third elastic wave filter may be a transmitting filter such as the second transmitting filter 16 in FIG. 3.

[0083]

[0084] The fourth elastic wave filter of the hexaplexer 70 includes a BAW resonator 101 and SAW resonators 1 02, 103, and 105. The fourth elastic wave filter may be a receiving filter such as the second receiving filter 18 in FIG. 3.

[0085] The fifth elastic wave filter of the hexaplexer 70 includes BAW resonators 111 and 112 and SA W resonators 113, 114, 115, 116, 117, 118, and 119. The fifth elastic wave filter may be a transmitting filter such as the third transmitting filter 62 in FIG. 3. The fifth elastic wave filter exemplifies that a shunt BAW resonator and a series BAW resonator can be coupled to the common node COM of the multiplexer. The shunt BAW resonator 112 is coupled to the side of the series BAW resonator 111 opposite to the SAW resonators of the fifth elastic wave filter.

[0086] The sixth elastic wave filter of the hexaplexer 70 includes SAW resonators 122, 123, 124, and and includes 125. The sixth elastic wave filter may be a receiving filter such as the third receiving filter 64 in FIG. 3. The sixth elastic wave filter exemplifies that one or more of the filters of the multiplexer can be implemented only by SAW resonators.

[0087] FIG. 5 is a schematic diagram of elastic wave resonators of a multiplexer 130 according to an embodiment. The multiplexer may include any suitable number of elastic wave filters. For example, the multiplexer may be a quadplexer having four filters, a pentaplexer having five filters, a hexaplexer having six filters, an octaplexer having eight filters, etc. In some examples, the multiplexer 130 may include 2 to 16 elastic wave filters connected to a common node COM. The elastic wave filters of the multiplexer 130 may include any suitable combination of receiving filters and / or transmitting filters. Each input / output (I / O) port of the elastic wave filter may be an input for a transmitting filter or an output for a receiving filter. Each elastic wave filter may include SAW resonators coupled to a common node via series BAW resonators. For example, the first elastic wave filter of the multiplexer 130 includes SAW resonators 132, 133, 134, and 135 and a BAW resonator 136. Here, all of the SAW resonators 132, 133, 134, and 135 are coupled to the common node COM via the series BAW resonator 136. For example, the Nth elastic wave filter of the multiplexer 130 includes SAW resonators 142, 143, 144, and 145 and a BAW resonator 146. Here, all of the SAW resonators 142, 143, 144, and 145 are coupled to the common node COM via the series BAW resonator 146. ​​​​​​​

[0088] FIG. 6 is a schematic diagram of the elastic wave resonator of the multiplexer 150 according to one embodiment. The multiplexer 150 is similar to the multiplexer 130 of FIG. 5, but the multiplexer 150 is different in that it includes an elastic wave filter in which only a plurality of SAW resonators are mounted. FIG. 6 illustrates that one or more elastic wave filters of the multiplexer include SAW resonators but do not include any BAW resonators at all. For example, the first elastic wave filter of the multiplexer 150 includes SAW resonators 152, 153, 154, 155, and 156 but does not include any BAW resonators at all. The multiplexer 150 also includes one or more elastic wave filters having SAW resonators coupled to a common node via series BAW resonators . For example, the Nth elastic wave filter of the multiplexer 150 includes SAW resonators 162, 163, 164, and 165 and BAW resonator 166. Here, all of the SAW resonators 162, 163, 164, and 165 are coupled to the common node COM via the series BAW resonator 166.

[0089] Any suitable number of BAW resonators can be coupled between the SAW resonators of the filter and the common node . For example, a series BAW resonator and one or more other series BAW resonators and / or one or more shunt BAW resonators can be coupled between the SAW resonators of the filter and the common node .

[0090] The multiplexer described herein can be implemented in various radio frequency systems . The radio frequency signal can process signals having frequencies in the range of about 30 kHz to 300 GHz, such as in the range of about 450 MHz to 6 GHz. As described herein Some radio frequency systems that include a multiplexer according to the principles and advantages described herein are configured to process carrier aggregation signals. In a radio frequency system with carrier aggregation, a number of filters can be arranged as a multiplexer and connected to a common a ntenna node. Some examples of radio frequency systems that can implement any suitable principles and advantages of the multiplexers and / or fil ters described herein are described below. ters described herein are described below. Some examples are described below.

[0091] FIGS. 7, 8, 9, 10A, and 10B are schematic block diagrams of an exemplary radio frequency system according to a given embodiment. The multiplexers in these radio frequency systems have BAW co-oscillators coupled between SAW resonators in one or more surface acoustic wave filters and a common node, resulting in reduced loading losses. Implementing a majority of SAW resonators in one or more of these surface acoustic wave filters can also red uce costs compared to most similar surface acoustic wave filters with BAW elements. The principles and advantages of filters that include a pl urality of SAW resonators and one or more BAW resonators can apply to filters that include any two different types of elastic wave resonators. E ach filter of the multiplexers of the radio frequency systems described herein can be a bandpass filter. ach filter of the multiplexers of the radio frequency systems described herein can be a bandpass filter. ach filter of the multiplexers of the radio frequency systems described herein can be a bandpass filter. ach filter of the multiplexers of the radio frequency systems described herein can be a bandpass filter.

[0092] FIG. 7 is a schematic diagram of a radio frequency system 170 that includes a quadplexer coupled to an antenna 177 via a diplexer 176. In FIG. 7, a first quadplexer includes surface acoustic wave filters 12, 14, 16, and 18. In FIG. 7, a second quad plexer... The multiplexer includes elastic wave filters 172, 173, 174, and 175. Diplexer 1 76 can serve to frequency multiplex radio frequency signals propagating between the exemplary quadplexer and the antenna 177.

[0093] FIG. 8 is a schematic diagram of a radio frequency system 18 0 that includes a quadplexer coupled to an antenna 177. FIG. 8 illustrates that in some applications, a multiplexer can be connected to an antenna without an intervening frequency multiplexing circuit (e.g., diplexer or triplexer). For example, when a carrier aggregation signal includes two carriers with relatively close frequencies, a diplexer or triplexer can be relatively difficult and / or expensive to implement and / or have relatively high losses. In such situations, multiple filters can be connected together to a common node as one multiplexer. As one example, such a multiplexer can be a quadplexer with transmit and receive filters for band 2 5 and band 66. As shown in FIG. 8, in a given application, a multiplexer can be connected to an antenna without an intervening switch or frequency multiplexing circuit. For example, a mobile phone configured to wirelessly communicate a carrier aggregation signal having only two carrier aggregation bands can include a multiplexer having a multiplexer connected to an antenna without any intervening switch or frequency multiplexing circuit. can include a multiplexer having a multiplexer connected to an antenna without any intervening switch or frequency multiplexing circuit.

[0094] FIG. 9 is a radio frequency diagram including an antenna 192 coupled to a receive path via a multiplexer. FIG. 190 is a schematic diagram of a wavenumber system 190. In some examples, the radio can be implemented for diversity receiving operations. A diversity antenna, such as the exemplary antenna 192, can provide received radio frequency signals to a plurality of receive paths . A multiplexer can be coupled between the plurality of receive paths and the diversity antenna . As shown in FIG. 9, a multiplexer (e.g., a quadplexer) including receive filters 193 and 194 can be coupled between each of receive paths 195 and 196 and antenna 192 . For a particular implementation, any suitable number of receive paths and corresponding receive filters can be implemented. For example, in some examples, four or more receive filters can be included in the multiplexer and corresponding receive paths . In some embodiments (not shown), a switch can be coupled between the multiplexer and the diversity antenna, and / or a switch can be coupled between the receive path and the receive filter of the multiplexer .

[0095] FIG. 10A is a schematic diagram of a radio frequency system 200 including a multiplexer in a signal path between a power amplifier and antenna 177 . The exemplary radio frequency system 200 includes a low band path, an intermediate band path, and a high band path. In a given application, the low band path can process radio frequency signals having a frequency less than 1 GHz, the intermediate band path can process radio frequency signals having a frequency between 1 GHz and 2.2 GHz, and the high band path can process radio frequency signals having a frequency greater than 2.2 GHz .

[0096] A frequency multiplexing circuit such as the diplexer 176 can be included between the signal path and the antenna 1 77. Such a frequency multiplexing circuit can serve as a frequency divider for the receiving path and a frequency combiner for the transmitting path. The diplexer 176 can multiplex a plurality of radio frequency signals with relatively separated frequencies. The diplexer 176 can be implemented by passive circuit elements with relatively low loss. The diplexer 176 can combine (for transmission) and separate (for reception) a plurality of carrier aggregation signals.

[0097] As illustrated, the low-band path includes a power amplifier 201 configured to amplify a low-band radio frequency signal, a band selection switch 202, and a multiplexer 203. The band selection switch 202 can electrically connect the output of the power amplifier 201 to a selected transmission filter of the multiplexer 203. The selected transmission filter can be a band-pass filter having a passband corresponding to the frequency of the output signal of the power amplifier 201. The multiplexer 203 can include any suitable number of transmission filters and any suitable number of reception filters. The multiplexer 203 may have the same number of transmission filters as reception filters in a given application. In some examples, the multiplexer 203 may have a different number of transmission filters than reception filters.

[0098] As illustrated in FIG. 10A, the intermediate-band path includes a power amplifier 204 configured to amplify an intermediate-band radio frequency signal, a band selection switch 205, and a multiplexer 206. ​​​​​​​It includes. The band selection switch 205 can electrically connect the output of the power amplifier 204 to the selected transmission filter of the multiplexer 206 The selected transmission filter can be a band-pass filter having a passband corresponding to the frequency of the output signal of the power amplifier 204 The multiplexer 206 can include any suitable number of transmission filters and any suitable number of reception filters. The multiplexer 206 may have the same number of transmission filters as reception filters in a given application In some examples, the multiplexer 206 may have a different number of transmission filters than reception filters In the exemplary radio frequency system 200, the high-band path includes a power amplifier 207 configured to widen the high-band radio frequency signal, a band selection switch 208, and a multiplexer

[0099] 209. The band selection switch 208 can electrically connect the output of the power amplifier 207 to the selected transmission filter of the multiplexer 209. The selected transmission filter can be a band-pass filter having a passband corresponding to the frequency of the output signal of the power amplifier 207 The multiplexer 209 can include any suitable number of transmission filters and any suitable number of reception filters. The multiplexer 209 may have the same number of transmission filters as reception filters in a given application In some examples, the multiplexer 209 may have a different number of transmission filters than reception filters In some examples, the multiplexer 209 may have a different number of transmission filters than reception filters The selection switch 210 diverts the radio frequency signal from the intermediate-band path or the high-band path to the diplexer In some examples, the multiplexer 209 may have a different number of transmission filters than reception filters In some examples, the multiplexer 209 may have a different number of transmission filters than reception filters good

[0100] The selection switch 210 diverts the radio frequency signal from the intermediate-band path or the high-band path to the diplexer It can be selectively applied to Kusano 176. Therefore, the radio frequency system 200, either by a combination of a low band and a high band or by a combination of a low band and an intermediate band, can process a carrier aggregation signal.

[0101] FIG. 10B is a schematic diagram of a radio frequency system 212 including a multiplexer in the signal path between a power amplifier and an antenna. The radio frequency system 212 is similar to the radio frequency system 200 of FIG. 10A, but is different in that the radio frequency system 212 includes switch multiplexing features. Switch multiplexing can be implemented according to any suitable principles and advantages described herein.

[0102] Switch multiplexing can implement on-demand multiplexing. Some radio frequency systems can operate in single carrier mode for a large amount of time (e.g., about 95% of the total time) and in carrier aggregation mode for a small amount of time (e.g., about 5% of the total time). Switch multiplexing can reduce the load in single carrier mode. Here, the radio frequency system can operate for a large amount of time compared to a multiplexer including a filter having a fixed connection to a common node. Such load reduction can be even more significant when the multiplexer includes a large number of filters. In the exemplary radio frequency system 212, multiplexers 213 and 214 are coupled to diplexer 176 via switch 215. Switch 215 has two or more connections. This load reduction can be even more significant when the multiplexer includes a large number of filters.

[0103] In the exemplary radio frequency system 212, multiplexers 213 and 214 are coupled to diplexer 176 via switch 215. Switch 215 has two or more connections. It is configured as a multi-throw switch in which multiple throws can be simultaneously active. Simultaneously active The multi-throw that becomes so is provided in switch 215, enabling the transmission and / or reception of the carrier aggregation signal. Switch 215 may also include a short throw that becomes active between single carrier modes. As an example, multiplexer 213 includes a plurality of duplexers coupled to separate throws of switch 215. Similarly, the exemplary multi plexer 214 also includes a plurality of duplexers coupled to separate throws of switch 215 . Alternatively, instead of coupling a duplexer to each throw of switch 215 as illustrated in FIG. 10B , one or more of the individual filters of the multiplexer may be coupled to dedicated throws of a switch coupled between the multiplexer and a common node. For example, in some applications , such a switch may have twice as many throws as the exemplary switch 215 .

[0104] Switch 215 is coupled between the filters of multiplexers 213 and 214 and a common node COM. FIG. 10B illustrates that fewer than all of the filters of the multiplexer can be electrically simultaneously connected to the common node.

[0105] In some examples, two or more throws of a switch coupled between a power amplifier and a multiplexer are simultaneously activated. For example, in radio frequency system 212, two or more throws of band selection switch 205 and / or band selection switch 208 are simultaneously activated in a given embodiment . When multiple throws of the switch electrically simultaneously connect the filters of the multiplexer to the power amplifier, load loss may occur. Therefore, the multi-plexer One or more of the grass elastic wave filters may be coupled between the surface acoustic wave resonator and the power amplifier. It may include a series bulk elastic wave resonator.

[0106] Figure 10C is a schematic diagram of the elastic wave resonator of the multiplexer 216 according to one embodiment. . The multiplexer 216 is similar to the multiplexer 130 of FIG. 5, but the SAW resonators 132 and 142 are replaced by BAW resonators 217 and 218 respectively. are different. The BAW resonators 217 and 218 are, for example, when multiple throws of a multi-throw switch are simultaneously active ports I / O1 and I / O N are electrically connected to each other in an application In the case of a shock, the load can be reduced compared to the SAW resonators 132 and 142. As shown in the example, the BAW resonators 217 and 218 of FIG. 10C are such that the BAW resonators 217 and 218 are electrically connected to each other by the double throw of the band selection switch 205 of FIG. 10B When, the load can be reduced compared to the SAW resonators 132 and 142 of FIG. 5. Any appropriate number of BAW resonators can be coupled between the SAW resonator of the filter and the I / O port (e.g., the input port for the transmitter filter). For example, a series BAW resonator and one or more other series BAW resonators and / or one or more shunt BAW resonators can be coupled between the SAW resonator of the filter and the common node. In some examples, the series BAW resonator is coupled between the I / O port and the surface acoustic wave resonator of only the transmitter filter of the multiplexer (not the surface acoustic wave resonator of the receiver filter of the multiplexer). In some examples, the series BAW resonator is coupled between the I / O port and the multiplexer resonator of only the transmitter filter of the multiplexer (not the surface acoustic wave resonator of the receiver filter of the multiplexer). In some examples, the series BAW resonator is coupled between the I / O port and the multiplexer resonator of only the transmitter filter of the multiplexer (not the surface acoustic wave resonator of the receiver filter of the multiplexer). In some examples, the series BAW resonator is coupled between the I / O port and the multiplexer resonator of only the transmitter filter of the multiplexer (not the surface acoustic wave resonator of the receiver filter of the multiplexer). In some examples, the series BAW resonator is coupled between the I / O port and the multiplexer The surface acoustic wave resonator with only a subset transmission filter (not the surface acoustic wave resonators of the receiving filter of the multiplexer and one or more other transmission filters) is coupled therebetween.

[0107] FIG. 11A is a block diagram of a filter assembly 220 having different dies and including surface acoustic wave resonators of one or more filters according to the embodiments described herein. As an example, the filter assembly 220 includes a SAW die 222 and a BAW die 224 included on a common substrate 226. One or more surface acoustic wave filters may include resonators implemented on the SAW die 222 and the BAW die 224. The BAW die 224 may be an FBAR die according to a given embodiment. The substrate 226 may be a laminated substrate or any other suitable package substrate . Resonators of one or more surface acoustic wave filters of the multiplexer can be implemented on the SAW die 222 and the BA W die 224. Resonators of one or more multiplexers can also be implemented on the SAW die 222 and the BAW die 224. For example, resonators for a number of multiplexers can be implemented on the SAW die 224 and the BAW die 224. As one example, a duplexer for band 25 and

[0108] band 66 electrically connected to a common node can be implemented in a quadplexer. In some designs, the transmission filter and the receiving filter of band 25 can be implemented by BAW resonators to meet performance specifications, and the transmission filter and the receiving filter of band 66 are implemented by SAW resonators to save cost . According to the principles and advantages described herein, most of the resonators (e.g., at least 70 in the transmission filter and the receiving filter of band 66 can be implemented by SAW resonators. %, at least 80%, or more) using the SAW resonator of the SAW die 222 These SAW resonators can be implemented as series BAW resonators on the BAW die 224. The band 66 transmit and receive filters can be connected to a common node via a The filter can be implemented by a resonator on the BAW die 224. In the present invention, one or more resonators of the transmit filter and / or the receive filter of band 66 are It can be mounted on a W die 222.

[0109] As another example, according to certain embodiments, a duplexer may be provided on the BAW die 224. and a transmit filter including a plurality of resonators on the SAW die 222. , at least one resonator on the BAW die 224 and multiple resonators on the SAW die 222 and a receive filter including:

[0110] According to certain embodiments, one or more of the acoustic wave filters of the multiplexer may include a SAW die. The resonators on both the BAW die 222 and the BAW die 224 can be implemented using the same multiplexer. On only one of the SAW die 222 or the BAW die 224, A resonator can be implemented.

[0111] In some embodiments, different SAW dies and / or Different BAW dies can be implemented for different frequency ranges. , may include piezoelectric layers and / or metallization layers of different thicknesses.

[0112] FIG. 11B illustrates a different diaphragm including an acoustic wave resonator of a filter according to embodiments described herein. It is a block diagram of a filter assembly 227 having I. As illustrated, the filter asse mbly 227 includes SAW dies 222A and 222B and B AW die 224 included on a common substrate 226. A multiplexer may include an elastic wave filter including resonators mounted on the first SAW die 222A and the BAW die 22 4. The multiplexer may also include another elastic wave fil ter including resonators mounted on the second SAW die 222B and the BAW die 224. Different SAW dies 222A and 222B can implement SAW resonators for elastic wave filters arranged to filter radio frequency signals within different predetermined frequency ranges. The multiplexer 20 of FIG. 2A can be implemented by the filter assembly 227. For example, the SAW resonators of the first transmission filter and the first receiver of the multiplexer 20 can be mounted on the first SAW die 222A, and the SAW resonators of the second transmission filter and the second reception filter of the multiplex er 20 can be mounted on the second SAW die 222B, and the BAW resonators of each filter of the multiplexer 20 can be mounted on the BAW die 224. In some other examples (not illustrated), the BAW resonators of the multiplexer 20 can be mounted on two or more BAW dies .. In some other examples (not illustrated), the BAW resonators of the multiplexer 20 can be mounted on two or more BAW dies .

[0113] FIG. 11C is a block diagram of a filter assembly 229 having a different die including an elastic wave resonator of a filter according to the embodiments described herein. As illustrated, the filter asse mbly 229 includes SAW dies 222A, 222B, and 222 C, and the BAW die 224 included on a common substrate 226. A multiplexer includes an elastic wave filter including resonators mounted on the first SAW die 222A and the B AW die 224. It may include an elastic wave filter including a resonator mounted on the AW die 224. The multiplexer may also include other elastic wave filters including resonators mounted on the second SAW die 222B and the BAW die 224. The multiplexer further may include an additional elastic wave filter including a resonator mounted on the third SAW die 222C and the B AW die 224. Different S AW dies 222A, 222B, and 222C can implement SAW resonators for elastic wave filters arranged to filter radio frequency signals within different predetermined frequency ranges thereof.

[0114] The multiplexer 70 in FIG. 4 can be implemented by the filter assembly 229 . For example, the SAW resonators of the first transmit filter and the first receiver of the multiplexer 70 can be mounted on the first SAW die 222A, and the SAW resonators of the second transmit filter and the second receive filter of the multiplexer 70 can be mounted on the second SAW die 222B, and the SAW resonators of the third transmit filter and the third receive filter of the multiplexer 70 can be mounted on the third SAW die 222C, and the BAW resonator of the multiplexer 70 can be mounted on the BAW die 224. In some other examples (not shown), the BAW resonator of the multiplexer 70 can be mounted on two or more BAW dies . In some other examples (not shown), the BAW resonator of the multiplexer 70 can be mounted on two or more BAW dies .

[0115] The filters and multiplexers described herein can be implemented in various packaged modules. Some examples of packaged modules that can implement any suitable principles and advantages of the multiplexers and / or filters described herein are . Some examples of packaged modules that can implement any suitable principles and advantages of the multiplexers and / or filters described herein are ​​This will be described below. FIGS. 12, 13, and 14 are schematic block diagrams of an exemplary package shaped module according to a predetermined embodiment.

[0116] FIG. 12 is a schematic block diagram of a module 230 including a power amplifier 232, a switch 234, and a filter 236 according to one or more embodiments. The module 230 may include a package that encloses the illustrated elements. The power amplifier 232, the switch 234, and the filter 236 can be arranged on a common package substrate. The package substrate may be, for example, a laminated substrate. The switch 234 may be a multi-throw radio frequency switch. The switch 234 can electrically couple the output of the power amplifier 232 to a selected filter of the filter 236. The filter 236 may include any suitable number of surface acoustic wave filters configured as a multiplexer. The surface acoustic wave filters of the filter 236 can be implemented according to any suitable principles and advantages described herein. The filter 236 may include one or more SAW dies and one or more BAW dies.

[0117] FIG. 13 is a schematic block diagram of a module 240 including power amplifiers 242 and 243, switches 244 and 245, and a filter 246 according to one or more embodiments. The module 240 is similar to the module 230 of FIG. 12, except that the module 240 includes additional power amplifiers 243 and additional switches 245, and the filter 246 is arranged as one or more multiplexers for the signal paths associated with the power amplifiers which is different.

[0118] FIG. 14 shows power amplifiers 252 and 253, switches 254 and 255, one or more embodiments​​ A module including filters 257 and 258 according to the form, and an antenna switch 259 is a schematic block diagram of 250. Module 250 is similar to module 240 in FIG. 13, but is different in that module 250 includes an antenna switch 259 arranged to selectively couple a signal from filter 257 or filter 258 to the antenna node. Filters 257 and 258 are arranged as separate multiplexers in FIG. 14.

[0119] FIG. 15 is a schematic block diagram of a wireless communication device 260 including a filter 263 according to one or more embodiments. The wireless communication device 260 may be any suitable wireless communication device. For example, the wireless communication device 260 may be a mobile phone such as a smartphone. As illustrated, the wireless communication device 260 includes an antenna 261, an RF front end 262, an RF transceiver 264, a processor 265, and a memory 266. The antenna 261 can transmit an RF signal provided by the RF front end 262. The antenna 261 can provide the received RF signal to the RF front end 262 for processing purposes.

[0120] The RF front end 262 may include one or more power amplifiers, one or more low-noise amplifiers, a plurality of RF switches, a plurality of receive filters, a plurality of transmit filters, a plurality of duplex filters, or any combination thereof. The RF front end 262 can transmit and receive RF signals associated with any suitable communication standard. The surface acoustic wave filter and / or multiplexer described herein are filters of the RF front end 262. ​​​​​​​​​​​​​​It can be implemented by 263.

[0121] The RF transceiver 264 can provide an RF signal to the RF front end 262 for amplification and / or other processing purposes. The RF transceiver 264 can also process the RF signal provided by the low-noise amplifier of the RF front end 262. The RF transceiver 264 communicates with the processor 265. The processor 265 may be a baseband processor. The processor 265 can provide any suitable baseband processing function for the wireless communication device 260. The memory 266 can be accessed by the processor 265. The memory 266 can store any suitable data for the wireless communication device 260. end 262. The RF transceiver 264 can also process the RF signal provided by the low-noise amplifier of the RF front end 262. The RF transceiver 264 communicates with the processor 265. The processor 265 may be a baseband processor. The processor 265 can provide any suitable baseband processing function for the wireless communication device 260. The memory 266 can be accessed by the processor 265. The memory 266 can store any suitable data for the wireless communication device 260. 62. The RF transceiver 264 can also process the RF signal provided by the low-noise amplifier of the RF front end 262. The RF transceiver 264 communicates with the processor 265. The processor 265 may be a baseband processor. The processor 265 can provide any suitable baseband processing function for the wireless communication device 260. The memory 266 can be accessed by the processor 265. The memory 266 can store any suitable data for the wireless communication device 260. cessor 265. The processor 265 may be a baseband processor. The processor 265 can provide any suitable baseband processing function for the wireless communication device 260. The memory 266 can be accessed by the processor 265. The memory 266 can store any suitable data for the wireless communication device 260. cessor 265 can provide any suitable baseband processing function for the wireless communication device 260. The memory 266 can be accessed by the processor 265. The memory 266 can store any suitable data for the wireless communication device 260. The memory 266 can be accessed by the processor 265. The memory 266 can store any suitable data for the wireless communication device 260. The memory 266 can store any suitable data for the wireless communication device 260. be.

[0122] Some of the above-described embodiments have been given as examples related to portable devices such as cellular handsets. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz. However, the principles and advantages of such embodiments can be beneficial for any other system or device, such as an uplink cellular device, that can benefit from any of the embodiments described herein. The teachings herein are applicable to various systems. Despite the fact that the present disclosure includes several example embodiments, the teachings described herein can be applied to various structures. All of the principles and advantages described herein can be implemented in relation to an RF circuit configuration that processes signals in the range of about 30 kHz to about 300 GHz, such as in the range of about 450 MHz to 6 GHz.

[0123] Multiple aspects of the present disclosure can be implemented in various electronic devices. The Examples include, but are not limited to, consumer electronic products, piezoelectric resonator dies and / or semiconductor dies and / or packages, components of consumer electronic products such as radio frequency modules, uplink wireless communication devices, wireless communication infrastructure, electronic test equipment, etc. Examples of electronic devices include, but are not limited to, mobile phones such as smartphones, wearable computing devices such as smartwatches or earpieces, telephones, televisions, computer monitors, computers, modems, handheld computers, laptop computers, tablet computers, personal digital assistants (PDAs), microwave ovens, refrigerators, automobiles, stereo systems, DVD players, CD players, digital music players such as MP3 players, radios, video cameras, cameras, digital cameras, portable memory chips, washing machines, dryers, washer / dryers, copiers, fax machines, scanners, multifunctional peripheral devices, wristwatches, mantel clocks, etc. Further, the electronic devices may also include unfinished products.

[0124] Throughout this specification and the claims, unless the context clearly dictates otherwise, terms such as "including" are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense, i.e., in the sense of "including, but not limited to". As used herein, the ordinary term "coupled" refers to two or more elements that can be either directly connected or connected through one or more intervening elements. Similarly, as used herein, the ordinary term "connected" refers to two or more elements that can be either directly connected or connected through one or more intervening elements. In addition, the words "here", "above", "below" and similar terms of that nature ​​​ When used in this application, the term refers to the entire application , and does not refer to any specific part of the application. Where the context permits, the terms in the above detailed description using the singular or plural each include the plural or singular as well. The words "or" and "or" referring to a list of two or more items cover all of the following interpretations of the word . That is, any item in the list, all items in the list, and any combination of items in the list.

[0125] Furthermore, conditional language described herein, such as in particular "can", "may", "may be done", "might", "for example" , "such as", etc., generally, unless otherwise stated or understood from the context of use, a given embodiment includes a given feature, element and / or state while other embodiments do not include these is intended to convey. That is, such conditional language is that the feature, element and / or state is in any manner necessary for one or more embodiments, or one or more embodiments always, with or without the author's input or prompting, whether these features, elements and / or states are included in or performed in any particular embodiment is generally not intended to suggest that it includes the logic to determine whether or not.

[0126] Some embodiments of the present invention have been described, but these embodiments are presented only as examples and are not intended to limit the scope of the disclosure. In fact, the novel methods, apparatuses and systems described herein can be embodied in various other forms. Furthermore ​​, various omissions, substitutions, and changes in the methods and system forms described herein can be made without departing from the gist shown. For example, although the blocks are presented in a given arrangement , alternative embodiments can perform similar functions with different components and / or circuit topologies and some blocks can be deleted, moved, added, subdivided, combined, and / or modified . Each of these blocks can be implemented in various different ways . Any suitable combination of the elements and steps of the various embodiments described above can be combined to provide further embodiments. The appended claims and their equivalents are intended to cover such forms or modifications that fall within the scope and gist of the present disclosure.

Claims

1. 1. A method for processing a carrier aggregation signal, comprising: filtering the carrier aggregation signal with a first acoustic wave filter coupled to an antenna port and having a first passband; filtering the carrier aggregation signal with a second acoustic wave filter coupled to the antenna port and having a second passband; Including, The carrier aggregation signal includes: a first radio frequency carrier in a first passband; a second radio frequency carrier in a second passband; and Including, The one second acoustic wave filter includes: a plurality of acoustic wave resonators of a first type; a second type of series acoustic wave resonator coupled in series between the first type of acoustic wave resonators and the antenna port; Including, the first type of acoustic wave resonators are a plurality of surface acoustic wave resonators; the second type series acoustic wave resonator is a bulk acoustic wave resonator; the second type series acoustic wave resonator has a lower load loss than the first type series acoustic wave resonators; the first type of acoustic wave resonators are on a different die than the second type of series acoustic wave resonator; wherein a number of the first type of acoustic wave resonators in the one second acoustic wave filter is at least 70% of a total number of resonators in the one second acoustic wave filter.

2. The method of claim 1 , further comprising receiving the carrier aggregated signal from an antenna coupled to the one antenna port.

3. The method of claim 1 , further comprising transmitting the carrier aggregated signal via an antenna coupled to the one antenna port.

4. 2. The method of claim 1, further comprising coupling the one of the first acoustic wave filters and the one of the second acoustic wave filters to the one of the antenna ports via a multi-throw switch.

5. 1. A method for processing a carrier aggregation signal, comprising: filtering the carrier aggregation signal with a first acoustic wave filter coupled to an antenna port and having a first passband; filtering the carrier aggregation signal with a second acoustic wave filter coupled to the antenna port and having a second passband; Including, The carrier aggregation signal includes: a first radio frequency carrier in a first passband; a second radio frequency carrier in a second passband; and Including, The one second acoustic wave filter includes: a plurality of acoustic wave resonators of a first type; a second type of series acoustic wave resonator coupled in series between the first type of acoustic wave resonators and the antenna port; Including, the second type series acoustic wave resonator has a lower load loss than the first type series acoustic wave resonators; the first type of acoustic wave resonators are a plurality of non-temperature compensated surface acoustic wave resonators; the second type series acoustic wave resonator is a temperature compensated surface acoustic wave resonator; wherein a number of the first type of acoustic wave resonators in the one second acoustic wave filter is at least 70% of a total number of resonators in the one second acoustic wave filter.

6. The method of claim 5 , further comprising receiving the carrier aggregated signal from an antenna coupled to the one antenna port.

7. The method of claim 5 , further comprising transmitting the carrier aggregated signal via an antenna coupled to the one antenna port.

8. 6. The method of claim 5, further comprising coupling the one of the first acoustic wave filters and the one of the second acoustic wave filters to the one of the antenna ports via a multi-throw switch.

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