CN115800952A

CN115800952A - Filter circuit

Info

Publication number: CN115800952A
Application number: CN202310070346.8A
Authority: CN
Inventors: 杨新宇; 邹雅丽; 汤正杰
Original assignee: Changzhou Chengxin Semiconductor Co Ltd
Current assignee: Changzhou Chengxin Semiconductor Co Ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-03-14

Abstract

A filter circuit relates to the technical field of semiconductors and comprises: the first filter circuit comprises a first part and a second part, wherein one end of the first part is connected with the transmitting end, the other end of the first part is connected with one end of the second part, and the other end of the second part is connected with the antenna end; one end of the second filter circuit is connected with the antenna end, and the other end of the second filter circuit is connected with the receiving end; a first part: the first resonator is electrically coupled with the transmitting end and connected with the second resonator, the first resonator is electrically coupled with the second part, and the second resonator is also electrically coupled with the transmitting end and grounded; a second part: and the third resonator is electrically coupled with the first part and connected with the fourth resonator and is electrically coupled with the antenna end at the same time, the fourth resonator is also electrically coupled with the first part and is grounded at the same time, and the third resonator and the fourth resonator comprise surface acoustic wave resonators. The second order harmonic effect of the whole circuit can be effectively reduced under the condition of not sacrificing the insertion loss of the first filter circuit.

Description

Filter circuit

Technical Field

The invention relates to the technical field of semiconductors, in particular to a filter circuit.

Background

The existing resonator technology mainly includes a Surface Acoustic Wave (SAW) resonator technology, a Bulk Acoustic Wave (BAW) resonator technology, a Low Temperature Co-fired Ceramic (LTCC) resonator technology, and the like. A radio frequency filter having good passband performance can be formed by a plurality of resonators.

The bulk acoustic wave resonator technology benefits from high quality factor (Q) and smaller structure size, is widely applied to wireless communication of modern handheld equipment, and achieves good radio frequency signal filtering performance. In order to save area, a duplexer or multiplexer structure that integrates two or more filters is widely used. The duplexer includes a transmit filter and a receive filter. The transmitting filter is connected between the signal transmitting end and the antenna end, and the receiving filter is connected between the antenna end and the signal receiving end.

Due to the piezoelectric layer material of the bulk acoustic wave resonator, for example: aluminum nitride or zinc oxide, etc., which are inherently nonlinear and generate clutter signals in the actual use process, are generally classified into the following two types: (1) Second order harmonic signals, if the frequency range of the second order harmonic signals generated by a transmitting end is just the passband range of a receiving filter at a certain antenna end connected in common, wrong signal crosstalk can be generated; (2) The third-order intermodulation signal is formed by third-order intermodulation of a signal generated by a transmitting end and a signal of an antenna end, and if the frequency is just within the passband range of a receiving filter of a certain co-connected antenna end, wrong signal crosstalk can be generated.

Therefore, the performance of the existing duplexer still needs to be improved.

Disclosure of Invention

The invention provides a filter circuit to improve the performance of a duplexer.

To solve the above technical problem, the technical solution of the present invention provides a filter circuit, including: a first filter circuit including a first portion and a second portion, one end of the first portion being connected to a transmission port, the other end of the first portion being connected to one end of the second portion, the other end of the second portion being connected to an antenna port; wherein the first portion comprises: a first resonator and a second resonator, wherein the first resonator comprises a first end and a second end, the second resonator comprises a third end and a fourth end, the first end of the first resonator is electrically coupled with the transmitting port, the second end of the first resonator is electrically coupled with the second part, the first end of the first resonator is also connected with the third end of the second resonator, the third end of the second resonator is also electrically coupled with the transmitting port, and the fourth end of the second resonator is grounded; wherein the second portion comprises: a third resonator and a fourth resonator, wherein the third resonator includes a fifth end and a sixth end, the fourth resonator includes a seventh end and an eighth end, the fifth end of the third resonator is electrically coupled to the first portion, the sixth end of the third resonator is electrically coupled to the antenna port, the fifth end of the third resonator is further connected to the seventh end of the fourth resonator, the seventh end of the fourth resonator is further electrically coupled to the first portion, the eighth end of the fourth resonator is grounded, the third resonator and the fourth resonator include saw resonators, and the types of the first resonator and the second resonator are different from the types of the third resonator and the fourth resonator; and one end of the second filter circuit is connected with the antenna port, and the other end of the second filter circuit is connected with the receiving port.

Optionally, the first resonator and the second resonator are of the same type.

Optionally, the first resonator and the second resonator include a bulk acoustic wave resonator, and the bulk acoustic wave resonator includes a film bulk acoustic wave resonator, a solid-state fabricated resonator, or an XBAR resonator.

Optionally, the wavelength ranges of the third resonator and the fourth resonator are less than 3 microns.

Optionally, the first part further comprises: a fifth resonator, where the fifth resonator includes a ninth end and a tenth end, the ninth end of the fifth resonator is electrically coupled to the transmit port, the tenth end of the fifth resonator is electrically coupled to the first end of the first resonator, and the tenth end of the fifth resonator is further electrically coupled to the third end of the second resonator.

Optionally, the type of the fifth resonator is the same as the type of the first resonator and the type of the second resonator.

Optionally, the fifth resonator includes a bulk acoustic wave resonator, and the bulk acoustic wave resonator includes a thin film bulk acoustic wave resonator, a solid state fabricated resonator, or an XBAR resonator.

Optionally, the first part further comprises: a sixth resonator, where the sixth resonator includes a tenth end and a tenth end, the ninth end of the fifth resonator is further connected to the tenth end of the sixth resonator, the tenth end of the sixth resonator is further electrically coupled to the transmission port, and the tenth end of the sixth resonator is grounded.

Optionally, the type of the sixth resonator is the same as the type of the first resonator and the type of the second resonator.

Optionally, the sixth resonator includes a bulk acoustic wave resonator, and the bulk acoustic wave resonator includes a thin film bulk acoustic wave resonator, a solid state fabricated resonator, or an XBAR resonator.

Optionally, the second part further comprises: a seventh resonator comprising a thirteenth end and a tenth end, the thirteenth end of the seventh resonator being electrically coupled to the sixth end of the third resonator, the fourteenth end of the seventh resonator being electrically coupled to the antenna port; the seventh resonator is of the same resonator type as the third resonator and the fourth resonator.

Optionally, the seventh resonator includes a surface acoustic wave resonator.

Optionally, the wavelength range of the seventh resonator is less than 3 microns.

Optionally, the second part further comprises: the eighth resonator comprises a fifteenth end and a sixteenth end, the fifteenth end of the eighth resonator is electrically coupled to the sixth end of the third resonator, the fifteenth end of the eighth resonator is further connected to the thirteenth end of the seventh resonator, and the sixteenth end of the eighth resonator is grounded; the eighth resonator is of the same resonator type as the third resonator and the fourth resonator.

Optionally, the eighth resonator includes a surface acoustic wave resonator.

Optionally, the wavelength range of the eighth resonator is less than 3 microns.

Optionally, the second part further comprises: a ninth resonator, which includes a seventeenth end and an eighteenth end, the seventeenth end of the ninth resonator is electrically coupled to the sixth end of the third resonator, the seventeenth end of the ninth resonator is further connected to the antenna port, and the eighteenth end of the ninth resonator is grounded; the ninth resonator is of the same resonator type as the third resonator and the fourth resonator.

Optionally, the ninth resonator includes a surface acoustic wave resonator.

Optionally, the wavelength range of the ninth resonator is less than 3 microns.

Optionally, the second filter circuit comprises: a ladder filter circuit or a bimodal surface acoustic wave filter circuit.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

according to the technical scheme, the first filter circuit is provided with the second part which is different from the first part in resonance type and is close to the antenna end, and the second part comprises the surface acoustic wave resonator, so that the second-order harmonic effect can be effectively reduced under the condition that the insertion loss of the first filter circuit is not sacrificed.

Further, the first part comprises a bulk acoustic wave resonator, the second part comprises a surface acoustic wave resonator, and the second harmonic effect can be reduced, and meanwhile, the influence on the insertion loss of the first filter circuit is reduced by means of the characteristic that the Q value of the bulk acoustic wave resonator is larger than that of the surface acoustic wave resonator.

Drawings

FIG. 1 is a schematic diagram of a circuit of a filter device in one embodiment;

FIG. 2 is a schematic diagram of a circuit of a filter device according to an embodiment;

FIGS. 3-6 are schematic diagrams of filter circuits according to one embodiment of the present invention;

FIG. 7 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention;

FIG. 8 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention;

FIG. 9 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention;

FIG. 10 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention;

FIG. 11 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention;

FIG. 12 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention.

Detailed Description

As described in the background, the performance of duplexers has yet to be improved. The analysis will now be described with reference to specific examples.

FIG. 1 is a schematic diagram of a circuit of a filter device according to an embodiment.

Referring to fig. 1, the filter circuit includes: the first filter circuit F1, the first filter circuit F1 including a plurality of first resonators S1, the plurality of first resonators S1 being connected in series between an antenna terminal ANT and a transmitting terminal Tx; one end of one second resonator T1 is connected with one end of two adjacent first resonators S1, and the other end of the second resonator T1 is grounded or connected with a passive device; a second filter circuit F2, the circuit configuration of the second filter circuit F2 being the same as that of the first filter circuit F1; an antenna terminal ANT, which is located between the first filter circuit F1 and the second filter circuit F2 and is connected to the first filter circuit F1 and the second filter circuit F2, respectively; the first resonators S1 in the second filter circuit F2 are connected in series between the antenna terminal ANT and the receiving terminal Rx.

In the filter circuit, a first filter circuit F1 is connected to a transmitting terminal Tx, the first filter circuit F1 is a transmitting filter, a second filter circuit F2 is connected to a receiving terminal Rx, and the second filter circuit F2 is a receiving filter. The antenna terminal ANT is connected to the first filter circuit F1 and the second filter circuit F2, respectively, to form a duplexer circuit. Since the duplexer transmitting terminal is generally connected to a Power Amplifier (PA), the insertion loss of the filter is high.

In this embodiment, the first resonator S1 and the second resonator T1 are surface acoustic wave resonators, and the surface acoustic wave resonators can reduce the influence of the second-order resonance effect, but the insertion loss of the filter becomes large because the Q value of the surface acoustic wave resonators is low relative to the Q value of the bulk acoustic wave resonators.

FIG. 2 is a schematic diagram of a circuit of a filter device according to an embodiment.

The filter device circuit includes: a first filter circuit F1, where the first filter circuit F1 includes a plurality of first resonators S1, and the plurality of first resonators S1 are connected in series between an antenna terminal ANT and a transmission terminal Tx; one end of one second resonator T1 is connected with one end of two adjacent first resonators S1, and the other end of the second resonator T1 is grounded or connected with a passive device; a second filter circuit F2, where the second filter circuit F2 includes a plurality of third resonators S2, the plurality of third resonators S2 are connected in series between an antenna end ANT and a receiving end Rx, the antenna end ANT is located between the first filter circuit F1 and the second filter circuit F2, and is respectively connected to the first filter circuit F1 and the second filter circuit F2; one end of one fourth resonator T2 is connected with one end of two adjacent third resonators S2, and the other end of the fourth resonator T2 is grounded or connected with a passive device; the first filter circuit F1 further includes: and a reverse polarization resonator T1b connected in parallel with the second resonator T1 closest to the antenna terminal ANT.

In the filter circuit, a first filter circuit F1 is connected to a transmitting terminal Tx, the first filter circuit F1 is a transmitting filter, a second filter circuit F2 is connected to a receiving terminal Rx, and the second filter circuit F2 is a transmitting-receiving filter. The antenna end ANT is located between the first filter circuit F1 and the second filter circuit F2, and is connected with the first filter circuit F1 and the second filter circuit F2 respectively to form a duplexer circuit. The first resonator S1 and the second resonator T1 are bulk acoustic wave resonators, and the third resonator S2 and the fourth resonator T2 are surface acoustic wave resonators. In order to suppress the second-order nonlinear effect of the transmit filter, one or more second resonators T1 with the strongest second-order nonlinear effect are connected in parallel with the polarization direction reversed, in this embodiment, the second resonator T1 closest to the antenna end ANT has the strongest second-order nonlinear effect, and the second resonator T1 closest to the antenna end ANT is connected in parallel with the anti-polarization resonator T1b to reduce the second-order nonlinear effect. However, in this circuit design, additional resonators connected in reverse polarization are added to the transmission filter, the number of resonators is increased, and when the filter is manufactured according to the circuit design, the difficulty of designing the filter and arranging the resonators is increased under the condition that the requirement of the external packaging area is not changed.

In order to solve the above problems, an aspect of the present invention provides a filter circuit, where a second part having a different resonance type from that of the first part is disposed near an antenna end of the first filter circuit, and the second part includes a surface acoustic wave resonator, so that a second-order harmonic effect can be effectively reduced without sacrificing insertion loss of the first filter circuit.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below.

Fig. 3 to 6 are schematic diagrams of a filter circuit according to an embodiment of the invention.

Referring to fig. 3 to 6, fig. 3 is a schematic structural diagram of the filter circuit, fig. 4 is a schematic circuit diagram of a first portion P1 in fig. 3, fig. 5 is a schematic circuit diagram of a second portion P2 in fig. 3, and fig. 6 is a schematic circuit diagram of a second filter circuit F2 in fig. 3, the filter circuit including: a first filter circuit F1, the first filter circuit F1 including a first part P1 and a second part P2 connected to each other, one end of the first part P1 being connected to the transmission port Tx, the other end of the first part P1 being connected to one end of the second part P2, the other end of the second part P2 being connected to the antenna port ANT; and a second filter circuit F2, wherein one end of the second filter circuit F2 is connected to the antenna port ANT, and the other end of the second filter circuit F2 is connected to the receiving port Rx.

With continued reference to fig. 4, in the present embodiment, the first portion P1 includes: the antenna comprises a first resonator S1 and a second resonator T1, wherein the first resonator S1 comprises a first end and a second end, the second resonator T1 comprises a third end and a fourth end, the first end of the first resonator S1 is electrically coupled with the transmitting port Tx, the second end of the first resonator S1 is electrically coupled with the second part P2, the first end of the first resonator S1 is further connected with the third end of the second resonator T1, the third end of the second resonator T1 is further electrically coupled with the transmitting port, and the fourth end of the second resonator T1 is grounded.

In this embodiment, the first resonator S1 and the second resonator T1 are of the same type.

In the present embodiment, the electrical coupling includes direct connection, indirect connection, inductive coupling, or the like.

In this embodiment, the first resonator S1 and the second resonator T1 include a bulk acoustic wave resonator, and the bulk acoustic wave resonator includes a thin film bulk acoustic resonator, a solid state mount resonator, or an XBAR resonator.

With continued reference to fig. 5, in the present embodiment, the second portion P2 includes: a third resonator S2 and a fourth resonator T2, where the third resonator S2 includes a fifth end and a sixth end, the fourth resonator T2 includes a seventh end and an eighth end, the fifth end of the third resonator S2 is electrically coupled to the first portion P1, the sixth end of the third resonator S2 is electrically coupled to the antenna port ANT, the fifth end of the third resonator S2 is further connected to the seventh end of the fourth resonator T2, the seventh end of the fourth resonator T2 is further electrically coupled to the first portion P1, and the eighth end of the fourth resonator T2 is grounded.

In this embodiment, the third resonator S2 and the fourth resonator T2 are of the same type.

The third resonator S2 and the fourth resonator T2 include surface acoustic wave resonators, and the types of the first resonator S1 and the second resonator T1 are different from the types of the third resonator S2 and the fourth resonator T2.

In this embodiment, the wavelength ranges of the third resonator S2 and the fourth resonator T2 are less than 3 micrometers.

In other embodiments, the wavelength ranges of the third resonator and the fourth resonator are greater than 3 microns according to actual requirements.

In other embodiments, the third resonator can be further split into a plurality of sub-resonators connected in series, the sub-resonators are of the same type as the third resonator, and the sum of the powers of the plurality of sub-resonators is equal to the power of the third resonator.

And the antenna terminal ANT is positioned between the first filter circuit F1 and the second filter circuit F2 and is respectively connected with the first filter circuit F1 and the second filter circuit F2 to form a duplexer circuit.

The first filter circuit F1 is provided with a second part P2 which is different from the first part P1 in resonance type and is close to an antenna end ANT, and the second part P2 comprises surface acoustic wave resonators, so that the second-order harmonic effect can be effectively reduced under the condition that the insertion loss of the first filter circuit F1 is not sacrificed.

Further, the first resonator S1 and the second resonator T1 of the first part P1 include a bulk acoustic wave resonator, and the third resonator S2 and the fourth resonator T2 of the second part P2 include a surface acoustic wave resonator, so that the second-order harmonic effect can be reduced, and at the same time, the influence on the insertion loss of the first filter circuit F1 can be reduced by virtue of the characteristic that the Q value of the bulk acoustic wave resonator is larger than the Q value of the surface acoustic wave resonator.

With reference to fig. 6, in this embodiment, the second filter circuit F2 includes a ladder filter circuit, the ladder filter circuit includes a tenth resonator S6 and an eleventh resonator T6, one end of the tenth resonator S6 is electrically coupled to an antenna terminal ANT, the other end of the tenth resonator S6 is connected to one end of the eleventh resonator T6, one end of the eleventh resonator T6 is further electrically coupled to the receiving port Rx, and the other end of the eleventh resonator T6 is grounded.

FIG. 7 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention.

Referring to fig. 7, fig. 7 is a schematic diagram based on fig. 4, where the first portion P1 further includes: a fifth resonator S3, where the fifth resonator S3 includes a ninth end and a tenth end, the ninth end of the fifth resonator S3 is electrically coupled to the transmission port Tx, the tenth end of the fifth resonator S3 is electrically coupled to the first end of the first resonator S1, and the tenth end of the fifth resonator S3 is further electrically coupled to the third end of the second resonator T1.

The type of the fifth resonator S3 is the same as the type of the first resonator S1 and the second resonator T1.

In this embodiment, the fifth resonator S3 includes a bulk acoustic wave resonator, and the bulk acoustic wave resonator includes a thin film bulk acoustic resonator, a solid state mount resonator, or an XBAR resonator.

FIG. 8 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention.

Referring to fig. 8, fig. 8 is a schematic diagram based on fig. 7, where the first portion P1 further includes: a sixth resonator T3, where the sixth resonator T3 includes a tenth end and a twelfth end, the ninth end of the fifth resonator S3 is further connected to the tenth end of the sixth resonator T3, the tenth end of the sixth resonator T3 is further electrically coupled to the transmission port Tx, and the twelfth end of the sixth resonator T3 is grounded.

The sixth resonator T3 is of the same type as the first resonator S1 and the second resonator T1.

In this embodiment, the sixth resonator T3 includes a bulk acoustic wave resonator, and the bulk acoustic wave resonator includes a thin film bulk acoustic resonator, a solid state mount resonator, or an XBAR resonator.

FIG. 9 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention.

Referring to fig. 9, fig. 9 is a schematic diagram based on fig. 5, in which the second portion P2 further includes: a seventh resonator S4, where the seventh resonator S4 includes a tenth three terminal and a fourteenth terminal, a thirteenth terminal of the seventh resonator S4 is electrically coupled to the sixth terminal of the third resonator S2, and a fourteenth terminal of the seventh resonator S4 is electrically coupled to the antenna port ANT.

The seventh resonator S4 is of the same type as the third resonator S2 and the fourth resonator T2.

In the present embodiment, the seventh resonator S4 includes a surface acoustic wave resonator.

In this embodiment, the wavelength range of the seventh resonator S4 is less than 3 microns.

FIG. 10 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention.

Referring to fig. 10, fig. 10 is a schematic diagram based on fig. 9, where the second portion P2 further includes: an eighth resonator T4, where the eighth resonator T4 includes a fifteenth end and a sixteenth end, the fifteenth end of the eighth resonator T4 is electrically coupled to the sixth end of the third resonator S2, the fifteenth end of the eighth resonator T4 is further connected to the thirteenth end of the seventh resonator S4, and the sixteenth end of the eighth resonator T4 is grounded.

The eighth resonator T4 is of the same resonator type as the third resonator S2 and the fourth resonator T2.

In the present embodiment, the eighth resonator T4 includes a surface acoustic wave resonator.

In this embodiment, the wavelength range of the eighth resonator T4 is less than 3 micrometers.

In this embodiment, the third resonator S2 and the seventh resonator S4 have the same power.

In other embodiments, the third resonator can be further split into a plurality of third sub-resonators connected in series, the type of the third sub-resonator is the same as the type of the third resonator, and the sum of the powers of the plurality of third sub-resonators is equal to the power of the third resonator.

In other embodiments, the seventh resonator can be further split into a plurality of seventh sub-resonators connected in series, the type of the seventh sub-resonator is the same as that of the seventh resonator, and the sum of the powers of the plurality of seventh sub-resonators is equal to the power of the seventh resonator.

FIG. 11 is a schematic diagram of a circuit of a filter device according to another embodiment of the present invention.

Referring to fig. 11, fig. 11 is a schematic diagram based on fig. 5, where the second portion P2 further includes: a ninth resonator T5, where the ninth resonator T5 includes a seventeenth end and an eighteenth end, the seventeenth end of the ninth resonator T5 is electrically coupled to the sixth end of the third resonator S2, the seventeenth end of the ninth resonator T5 is further connected to the antenna port, and the eighteenth end of the ninth resonator T5 is grounded.

The ninth resonator T5 is of the same type as the third resonator S2 and the fourth resonator T2.

In the present embodiment, the ninth resonator T5 includes a surface acoustic wave resonator.

In this embodiment, the wavelength range of the ninth resonator T5 is less than 3 micrometers.

Referring to fig. 12, the difference between fig. 12 and fig. 6 is that the second filter circuit F2 further includes a bimodal surface acoustic wave filter circuit S7, one end of the bimodal surface acoustic wave filter circuit S7 is connected to the receiving port Rx, the other end of the bimodal surface acoustic wave filter circuit S7 is connected to the other end of the tenth resonator S6, and the other end of the bimodal surface acoustic wave filter circuit S7 is further connected to one end of the eleventh resonator T6.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.

Claims

1. A filter arrangement circuit, comprising:

a first filter circuit including a first part and a second part, one end of the first part being connected to a transmission port, the other end of the first part being connected to one end of the second part, the other end of the second part being connected to an antenna port;

wherein the first portion comprises: a first resonator and a second resonator, wherein the first resonator comprises a first end and a second end, the second resonator comprises a third end and a fourth end, the first end of the first resonator is electrically coupled with the transmitting port, the second end of the first resonator is electrically coupled with the second part, the first end of the first resonator is also connected with the third end of the second resonator, the third end of the second resonator is also electrically coupled with the transmitting port, and the fourth end of the second resonator is grounded;

wherein the second portion comprises: a third resonator and a fourth resonator, wherein the third resonator includes a fifth end and a sixth end, the fourth resonator includes a seventh end and an eighth end, the fifth end of the third resonator is electrically coupled to the first portion, the sixth end of the third resonator is electrically coupled to the antenna port, the fifth end of the third resonator is further connected to the seventh end of the fourth resonator, the seventh end of the fourth resonator is further electrically coupled to the first portion, the eighth end of the fourth resonator is grounded, the third resonator and the fourth resonator include saw resonators, and the types of the first resonator and the second resonator are different from the types of the third resonator and the fourth resonator;

and one end of the second filter circuit is connected with the antenna port, and the other end of the second filter circuit is connected with the receiving port.

2. The filtering arrangement circuit of claim 1, wherein said first resonator and said second resonator are of the same type.

3. The filtering device circuit of claim 1, wherein the first resonator and the second resonator comprise bulk acoustic wave resonators, the bulk acoustic wave resonators comprising thin film bulk acoustic resonators, solid state fabricated resonators, or XBAR resonators.

4. The filtering arrangement circuit of claim 1, wherein the third resonator and the fourth resonator have a wavelength range of less than 3 microns.

5. The filter arrangement circuit of claim 1, wherein the first section further comprises: a fifth resonator, where the fifth resonator includes a ninth end and a tenth end, the ninth end of the fifth resonator is electrically coupled to the transmit port, the tenth end of the fifth resonator is electrically coupled to the first end of the first resonator, and the tenth end of the fifth resonator is further electrically coupled to the third end of the second resonator.

6. The filtering arrangement circuit of claim 5, wherein the fifth resonator is of the same type as the first resonator and the second resonator.

7. The filtering device circuit of claim 5, wherein the fifth resonator comprises a bulk acoustic wave resonator comprising a thin film bulk acoustic resonator, a solid state fabricated resonator, or an XBAR resonator.

8. The filter arrangement circuit of claim 5, wherein the first section further comprises: a sixth resonator, where the sixth resonator includes a tenth end and a tenth end, the ninth end of the fifth resonator is further connected to the tenth end of the sixth resonator, the tenth end of the sixth resonator is further electrically coupled to the transmission port, and the tenth end of the sixth resonator is grounded.

9. The filtering arrangement circuit of claim 8, wherein the sixth resonator is of the same type as the first resonator and the second resonator.

10. The filtering device circuit of claim 8, wherein the sixth resonator comprises a bulk acoustic wave resonator comprising a thin film bulk acoustic resonator, a solid state fabricated resonator, or an XBAR resonator.

11. The filtering arrangement circuit of claim 1, wherein the second portion further comprises: a seventh resonator, where the seventh resonator includes a thirteenth end and a tenth end, a thirteenth end of the seventh resonator is electrically coupled to the sixth end of the third resonator, and a fourteenth end of the seventh resonator is electrically coupled to the antenna port; the seventh resonator is of the same resonator type as the third resonator and the fourth resonator.

12. The filtering arrangement circuit of claim 11, wherein said seventh resonator comprises a surface acoustic wave resonator.

13. The filtering arrangement circuit of claim 12, wherein the seventh resonator has a wavelength range of less than 3 microns.

14. The filter arrangement circuit of claim 11, wherein the second portion further comprises: the eighth resonator comprises a fifteenth end and a sixteenth end, the fifteenth end of the eighth resonator is electrically coupled to the sixth end of the third resonator, the fifteenth end of the eighth resonator is further connected to the thirteenth end of the seventh resonator, and the sixteenth end of the eighth resonator is grounded; the eighth resonator is of the same resonator type as the third resonator and the fourth resonator.

15. The filtering arrangement circuit of claim 14, wherein said eighth resonator comprises a surface acoustic wave resonator.

16. The filtering arrangement circuit of claim 15, wherein the eighth resonator has a wavelength range of less than 3 microns.

17. The filter arrangement circuit of claim 1, wherein the second portion further comprises: a ninth resonator, which includes a seventeenth end and an eighteenth end, the seventeenth end of the ninth resonator is electrically coupled to the sixth end of the third resonator, the seventeenth end of the ninth resonator is further connected to the antenna port, and the eighteenth end of the ninth resonator is grounded; the ninth resonator is of the same resonator type as the third resonator and the fourth resonator.

18. The filtering arrangement circuit of claim 17, wherein said ninth resonator comprises a surface acoustic wave resonator.

19. The filtering arrangement circuit of claim 18, wherein the ninth resonator has a wavelength range of less than 3 microns.

20. The filter arrangement circuit of claim 1, wherein the second filter circuit comprises: a ladder filter circuit or a bimodal surface acoustic wave filter circuit.