CN117855790A - Non-reflection filtering power divider based on asymmetric filtering network - Google Patents
Non-reflection filtering power divider based on asymmetric filtering network Download PDFInfo
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Abstract
The invention discloses a reflection-free filtering power divider based on an asymmetric filtering network, which mainly comprises the following components: a power dividing part, a first asymmetric filter network part and a second asymmetric filter network part; the first asymmetric filter network portion is rotationally symmetric with the second asymmetric filter network portion; the asymmetric filter network has S with equal amplitude and opposite phase 11 And S is 22 (i.e. S 11 ＝‑S 22 ) S of equal amplitude and phase 12 And S is 21 (i.e. S 12 ＝S 21 ) And the like, the reflected signal can be dissipated on the isolation resistor of the power divider. The reflection-free filtering power divider has the advantages of simple structure, no need of additionally adding an absorption circuit, wide reflection-free bandwidth, excellent frequency selection and power distribution characteristics and the like.
Description
Technical Field
The invention belongs to the technical field of microwave communication, and particularly relates to a reflection-free filtering power divider based on an asymmetric filtering network.
Background
With the rapid development of wireless communication technology in recent years, the demand for highly reliable and high-performance communication systems has led to the design of reflection/absorption-free passive devices becoming more and more interesting. As an indispensable filter circuit in a wireless system, compared with a traditional reflection filter, the reflection-free filter can filter unwanted signals and absorb unwanted out-of-band radio frequency signal echoes at the same time, so that interference of front-end active stages in the system is prevented. The power divider is also an indispensable passive device in a wireless system, and can be used as a feed network and the like for an antenna array. Therefore, the reflectionless filtering power divider integrates the functions of port reflectionless, frequency selection and power distribution in a single device, greatly improves the integration level of the system, reduces the cascading loss of the devices and has important significance for the development of a wireless system. In summary, the reflectionless filter power divider has important research value.
The current reflection-free filter power divider is mainly realized by adding an absorption branch at an input end, such as a band-stop circuit based on a complementary duplexing type principle by loading a termination resistor at an input port and an output port in document 1 (Gomez-Garcia R, munoz-Ferraseas J M, psychogiou D.RF reflectionless filtering power dividers [ J ]. IEEE Transactions on Circuits and Systems II-Express Briefs,2019,66 (6): 933-937.) and document 2 (Fan M, song K, yang L, gd mez-Garc I a R.frequency reconfigurable input-reflectionless bandpass filter and filtering power divider with constant absolute bandwidth [ J ]. Transactions on Circuits and Systems II-Express Briefs,2021,68 (7): 2424-2428.); and document 3 (ZhuY-H, J Cai, y.cao, J-X chen. Compact wideband absorptive filtering power divider with a reused composite T-shape network [ J ]. IEEE Transactions on Circuits and Systems II-Express Briefs,2023,70 (3): 899-903.) implements an input non-reflection response using an absorption branch added at an input port and a composite T-network. In document 4 (ZhangY, wuY, yan J, wang w.wideband high-selectivity filtering all-frequency absorptive power divider with deep out-of-band support [ J ]. IEEE Transactions on Plasma Science,2021,49 (7): 2099-2106.) three additional absorption branches are used to achieve non-reflective performance of the input port. Also in document 5 (Li Q, tang H, tang D, tang Z, luo x.compact SIDGS filtering power divider with three-port 10-GHz reflectionless range J IEEE Transactions on Circuits and Systems II-Express Briefs,2022,69 (7): 3129-3133.) an absorption network designed with a terminating-cascode topology is employed to achieve reflectionless performance, but requires additional power. The method of increasing absorption branches or branches to realize port no-reflection characteristic is adopted in the method of the report, on one hand, the loaded network can influence the transmission response of the filtering public divider; on the other hand, additional circuit dimensions are added.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide the reflection-free filtering power divider based on the asymmetric filtering network, which has the characteristics of low loss, simple design method, simple structure and the like, and can meet the requirements of the current high-performance wireless communication system.
The technical solution for realizing the purpose of the invention is as follows: the power divider comprises an input port feed part, a first output port feed part, a second output port feed part, a power dividing part, a first asymmetric filter network part, a second asymmetric filter network part, a dielectric substrate and a metal ground;
the input port feed part, the first output port feed part, the second output port feed part, the power division part, the first asymmetric filter network part and the second asymmetric filter network part are arranged on the upper surface of the medium substrate; the metal ground is arranged on the lower surface of the dielectric substrate;
the input port feed part is arranged at the front end of the power division part, the front end of the first asymmetric filter network part is connected with one side of the rear end of the power division part, and the first output port feed part is arranged at the rear end of the first asymmetric filter network part; the front end of the second asymmetric filter network part is connected with the other side of the rear end of the power dividing part, and the second output port feed part is arranged at the rear end of the second asymmetric filter network part.
Further, the power dividing part comprises a first transmission line, a second transmission line, a third transmission line, a fourth transmission line, a first isolation resistor and a second isolation resistor;
the front ends of the first transmission line and the third transmission line are connected with the feed part of the input port; the rear end of the first transmission line is connected with the front end of the second transmission line; the rear end of the second transmission line is connected with the front end of the fourth transmission line; the first isolation resistor is connected between the rear ends of the first transmission line and the third transmission line in a bridging manner; the second isolation resistor is connected between the rear ends of the second transmission line and the fourth transmission line in a bridging mode.
Further, the first transmission line and the third transmission line have the same impedance characteristics; the characteristic impedance of the second transmission line is the same as that of the fourth transmission line; the electrical lengths of the first transmission line, the second transmission line, the third transmission line and the fourth transmission line are all the same as 90 degrees.
Further, the first asymmetric filter network portion includes a first open-ended coupled feed line, a first split-ring resonator, a second split-ring resonator, and a third split-ring resonator; the first terminal short-circuit coupling feeder comprises a first coupling feeder and a first short-circuit grounding through hole; one end of the first coupling feeder line is connected with the rear end of the second transmission line, and the other end of the first coupling feeder line is provided with the first short-circuit grounding through hole; one end of the first open-ended coupling feeder line is connected with the first output port feed part;
the first split ring resonator and the second split ring resonator are opposite in opening and symmetrically arranged between the first terminal short-circuit coupling feeder line and the first terminal open-circuit coupling feeder line; the third split ring resonator is positioned on one side of the first split ring resonator and one side of the second split ring resonator, the opening of the third split ring resonator is coaxial with the symmetry axes of the first split ring resonator and the second split ring resonator, and the opening direction is far away from the first split ring resonator and the second split ring resonator.
Further, the second asymmetric filter network portion includes a second open-ended coupled feed line, a fourth split-ring resonator, a fifth split-ring resonator, and a sixth split-ring resonator; the second terminal short-circuit coupling feeder comprises a second coupling feeder and a second short-circuit grounding through hole; one end of the second coupling feeder line is connected with the second output port feed part, and the other end of the second coupling feeder line is provided with the second short-circuit grounding through hole; one end of the second open-ended coupling feeder is connected with the rear end of the fourth transmission line;
the openings of the fourth split ring resonator and the fifth split ring resonator are opposite and symmetrically arranged between the second terminal short-circuit coupling feeder line and the second terminal open-circuit coupling feeder line; the sixth split ring resonator is positioned at one side of the fourth split ring resonator and the fifth split ring resonator, the opening of the sixth split ring resonator is coaxial with the symmetry axes of the fourth split ring resonator and the fifth split ring resonator, and the opening direction of the sixth split ring resonator is far away from the fourth split ring resonator and the fifth split ring resonator.
Further, the first to third split ring resonators and the fourth to sixth split ring resonators have the same impedance characteristics.
Further, the first to third split ring resonators and the fourth to sixth split ring resonators are folded half-wavelength resonators, and the electrical lengths are all 180 ° identical.
Further, the first asymmetric filter network portion and the second asymmetric filter network portion are the same size and spatially rotationally symmetric.
Further, the power division part is a second-order wilkinson power divider and has the same working frequency as the centers of the first asymmetric filter network part and the second asymmetric filter network part.
Further, the metal ground and the dielectric substrate are rectangular.
Compared with the prior art, the invention has the remarkable advantages that:
(1) The reflection-free filtering power divider is realized by combining an asymmetric filtering network with a Wilkinson power divider. The adopted asymmetric filter network has S with equal amplitude and opposite phase 11 And S is 22 (i.e. S 11 ＝-S 22 ) S of equal amplitude and phase 12 And S is 21 (i.e. S 12 ＝S 21 ) And the characteristic of easy design of the filter response, connect two asymmetric filter networks to two branches of the power division part separately in a rotational symmetry way, can dissipate the reflected signal on the isolation resistance of the power divider.
(2) The reflection-free filtering power divider has the advantages of simple structure, no need of additionally adding an absorption circuit, wide reflection-free bandwidth, excellent filtering characteristic and the like.
The invention is described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of a reflection-free filter power divider based on an asymmetric filter network in one embodiment.
FIG. 2 is a top view of a reflectionless filtered power divider in one embodiment;
FIG. 3 is a simulation diagram of S-parameters of a reflectionless filter power divider in one embodiment;
fig. 4 is a diagram of the phase difference at the output port of a reflectionless filter power divider in one embodiment.
Detailed Description
Hereinafter, various embodiments of a reflectionless filter power divider of an asymmetric filter network will be more fully described. Various embodiments are possible in connection with the present disclosure, and adjustments and changes may be made therein. However, it should be understood that: there is no intention to limit the various embodiments of the disclosure to the specific embodiments disclosed herein, but rather the disclosure is to be interpreted to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.
The expressions (such as "first", "second", etc.) used in the various embodiments of the reflectionless filter power divider of the asymmetric filter network may modify the various constituent elements in the various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.
It should be noted that: in describing the connection relationship among the power dividing portion, the first asymmetric filter network portion, and the second asymmetric filter network portion in the reflectionless filter power divider, if it is described to "connect" one constituent element to another constituent element, the first constituent element may be directly connected to the second constituent element, and the third constituent element may be "connected" between the first constituent element and the second constituent element. Conversely, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the reflectionless filtered power divider is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present disclosure. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of this disclosure belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in the various embodiments of the disclosure.
In one embodiment, in combination with fig. 1 to 2, there is provided an asymmetric filter network-based reflectionless power divider, which includes an input port feed section 1, a first output port feed section 2, a second output port feed section 3, a power dividing section, a first asymmetric filter network section, a second asymmetric filter network section, a dielectric substrate 7, and a metal ground 8;
the input port feed part 1, the first output port feed part 2, the second output port feed part 3, the power division part, the first asymmetric filter network part and the second asymmetric filter network part are arranged on the upper surface of the medium substrate 7; the metal land 8 is arranged on the lower surface of the dielectric substrate 7;
the input port feed part 1 is arranged at the front end of the power division part, the front end of the first asymmetric filter network part is connected with one side of the rear end of the power division part, and the first output port feed part 2 is arranged at the rear end of the first asymmetric filter network part; the front end of the second asymmetric filter network part is connected with the other side of the rear end of the power division part, and the second output port feed part 3 is arranged at the rear end of the second asymmetric filter network part.
Here, preferably, the first output port feeding section 2 and the second output port feeding section 3 are symmetrical about the axis of the input port feeding section 1, the power dividing section is a symmetrical structure about the axis of the input port feeding section 1, and the first asymmetric filter network section and the second asymmetric filter network section are symmetrical about the axis of the input port feeding section 1.
Further, in one embodiment, the power dividing portion includes a first transmission line 411, a second transmission line 412, a third transmission line 421, a fourth transmission line 422, a first isolation resistor 43, and a second isolation resistor 44;
front ends of the first transmission line 411 and the third transmission line 421 are connected to the input port feeding section 1; the rear end of the first transmission line 411 is connected to the front end of the second transmission line 412; the rear end of the second transmission line 421 is connected to the front end of the fourth transmission line 422; the first isolation resistor 43 is connected between the rear ends of the first transmission line 411 and the third transmission line 421 in a bridging manner; the second isolation resistor 44 is connected across the rear ends of the second transmission line 412 and the fourth transmission line 422. The rear ends of the second and fourth transmission lines 412 and 422 serve as one side and the other side of the rear end of the power dividing portion, respectively.
Here, preferably, the first transmission line 411 and the third transmission line 421 have the same impedance characteristics; the second transmission line 412 has the same characteristic impedance as the fourth transmission line 422; the electrical lengths of the first transmission line 411, the second transmission line 412, the third transmission line 421 and the fourth transmission line 422 are all the same as 90 °.
Here, it is preferable that the first transmission line 411 and the second transmission line 412, the third transmission line 421 and the fourth transmission line 422 are symmetrical with respect to the input port feeding section 1.
Here, it is preferable that the first transmission line 411 and the second transmission line 412 are bent in an S-shaped structure, and the third transmission line 421 and the fourth transmission line 422 are bent in an S-shaped structure.
It can be seen that in the reflectionless filter power divider, the power dividing part 4 is a second-order wilkinson power divider and has the same central working frequency as the first asymmetric filter network part and the second asymmetric filter network part.
Further, in one embodiment, the first asymmetric filter network portion includes a first short-circuited-terminated coupling feed 51, a first open-circuited-terminated coupling feed 52, a first split-ring resonator 531, a second split-ring resonator 532, and a third split-ring resonator 533; the first terminal short-circuit coupling feeder 51 includes a first coupling feeder 511 and a first short-circuit ground via 512; one end of the first coupling feeder 511 is connected to the rear end of the second transmission line 412, and the other end of the first coupling feeder 511 is provided with the first short-circuit grounding through hole 512; one end of the first open-ended coupling feeder 52 is connected to the first output port feed section 2;
the first split ring resonator 531 and the second split ring resonator 532 are opposite in opening and symmetrically arranged between the first short-circuit coupling feeder 51 and the first open-circuit coupling feeder 52; the third split ring resonator 533 is located on one side (upper side as shown in fig. 2) of the first split ring resonator 531 and the second split ring resonator 532, and has an opening coaxial with the symmetry axis of the first split ring resonator 531 and the second split ring resonator 532, and has an opening direction away from the first split ring resonator 531 and the second split ring resonator 532 (an opening direction facing upward as shown in fig. 2).
Here, preferably, the impedance characteristics of the first to third split ring resonators 531 to 533 are the same; the first to third split ring resonators 531 to 533 are bent half-wavelength resonators and have the same electrical length of 180 °; the short-circuited ground via 512 is placed at the end of the coupling feed line 511.
It can be seen that in the reflectionless filter power divider referred to above, the first to third split-ring resonators 531-533 in the first asymmetric filter network section 5 employ cross-coupling to create out-of-band zero.
Further, in one embodiment, the second asymmetric filter network portion includes a second short-circuited terminated coupling feed 61, a second open-circuited terminated coupling feed 62, a fourth split-ring resonator 631, a fifth split-ring resonator 632, and a sixth split-ring resonator 633; the second terminal short-circuit coupling feeder 61 includes a second coupling feeder 611 and a second short-circuit ground via 612; one end of the second coupling feeder 611 is connected to the second output port feeding section 3, and the other end of the second coupling feeder 611 is provided with the second short-circuit ground through hole 612; one end of the second open-ended coupling feeder 62 is connected to the rear end of the fourth transmission line 422;
the fourth split ring resonator 631 and the fifth split ring resonator 632 are arranged symmetrically between the second open-ended coupling feeder 61 and the second open-ended coupling feeder 62 with opposite openings; the sixth split ring resonator 633 is located at one side (lower side as shown in fig. 2) of the fourth split ring resonator 631 and the fifth split ring resonator 632, and has an opening coaxial with the symmetry axis of the fourth split ring resonator 631 and the fifth split ring resonator 632, and has an opening direction far from the fourth split ring resonator 631 and the fifth split ring resonator 632 (the opening direction is downward as shown in fig. 2).
Here, the second asymmetric filter network portion is preferably the same size as the first asymmetric filter network portion and spatially rotationally symmetric.
Here, preferably, the impedance characteristics of the fourth to sixth split ring resonators 631 to 633 are the same; the fourth to sixth split ring resonators 631-633 are folded half-wavelength resonators and have the same electrical length of 180 °; the short-circuited ground via 612 is placed at the end of the coupling feed 611.
The present invention will be described in detail with reference to the following examples.
The S parameter of the filter power divider along with the change of frequency is shown in fig. 3, and it can be found that the center frequency of the filter power divider is 2GHz, the 3dB bandwidth of the passband is from 1.945GHz to 2.045GHz, the relative bandwidth is 5%, the zero point is located at 2.1GHz, and the-10 dB non-reflection bandwidth is from 1GHz to 2.95GHz.
It should be noted that the filtering power divider is not limited to the above frequency band and bandwidth, and the filtering power divider can be operated in other frequency bands by adjusting the lengths and distances of the first to third split ring resonators 531 to 533 and the fourth to sixth split ring resonators 631 to 633 as needed.
Fig. 4 shows the phase difference of the output ports of the reflectionless filter power divider, and it can be seen that the phases of the two output ports of the filter power divider remain identical in the pass band.
In summary, the non-reflection filtering power divider based on the asymmetric filtering network can realize excellent non-reflection performance, frequency selection and power distribution characteristics in a wider frequency band based on a simple structure, and is beneficial to improving the stability and the integration level of a wireless communication system. Meanwhile, the invention has the characteristics of light weight, simple processing, low price and the like.
It will be understood that when an element or layer is referred to as being "on" or "coupled" to another element or layer, it can be directly on, connected or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Spatially relative terms, such as "under" …, "below," "lower," "above," "over" and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "below" may include both an orientation above and below. Other orientations of the device (90 degrees or other orientations) are possible, and spatially relative descriptors used herein interpreted accordingly.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The reflection-free filtering power divider based on the asymmetric filtering network is characterized by comprising an input port feed part (1), a first output port feed part (2), a second output port feed part (3), a power dividing part, a first asymmetric filtering network part, a second asymmetric filtering network part, a medium substrate (7) and a metal ground (8);
the input port feed part (1), the first output port feed part (2), the second output port feed part (3), the power division part, the first asymmetric filter network part and the second asymmetric filter network part are arranged on the upper surface of the medium substrate (7); the metal ground (8) is arranged on the lower surface of the dielectric substrate (7);
the input port feed part (1) is arranged at the front end of the power division part, the front end of the first asymmetric filter network part is connected with one side of the rear end of the power division part, and the first output port feed part (2) is arranged at the rear end of the first asymmetric filter network part; the front end of the second asymmetric filter network part is connected with the other side of the rear end of the power dividing part, and the second output port feed part (3) is arranged at the rear end of the second asymmetric filter network part.
2. The asymmetric filter network based reflectionless filter power divider of claim 1, wherein the power divider section comprises a first transmission line (411), a second transmission line (412), a third transmission line (421), a fourth transmission line (422), a first isolation resistor (43), and a second isolation resistor (44);
front ends of the first transmission line (411) and the third transmission line (421) are connected with the input port feed part (1); the rear end of the first transmission line (411) is connected with the front end of the second transmission line (412); the rear end of the second transmission line (421) is connected with the front end of the fourth transmission line (422); the first isolation resistor (43) is connected between the rear ends of the first transmission line (411) and the third transmission line (421) in a bridging way; the second isolation resistor (44) is connected across the rear ends of the second transmission line (412) and the fourth transmission line (422).
3. The non-reflective filtering power divider based on an asymmetric filtering network according to claim 2, characterized in that the first transmission line (411) and the third transmission line (421) have the same impedance characteristics; -the second transmission line (412) has the same characteristic impedance as the fourth transmission line (422); the electrical lengths of the first transmission line (411), the second transmission line (412), the third transmission line (421) and the fourth transmission line (422) are all the same as 90 degrees.
4. A non-reflective filtering power divider based on an asymmetric filtering network as claimed in claim 3, characterized in that the first asymmetric filtering network part comprises a first short-circuited terminated coupling feed (51), a first open-circuited terminated coupling feed (52), a first split-ring resonator (531), a second split-ring resonator (532) and a third split-ring resonator (533); the first terminal short-circuit coupling feeder line (51) comprises a first coupling feeder line (511) and a first short-circuit grounding through hole (512); one end of the first coupling feeder line (511) is connected with the rear end of the second transmission line (412), and the other end of the first coupling feeder line (511) is provided with the first short-circuit grounding through hole (512); one end of the first open-ended coupling feeder (52) is connected with the first output port feed part (2);
the first split ring resonator (531) and the second split ring resonator (532) are opposite in opening and symmetrically arranged between the first terminal short-circuit coupling feeder line (51) and the first terminal open-circuit coupling feeder line (52); the third split ring resonator (533) is located at one side of the first split ring resonator (531) and the second split ring resonator (532), the opening of the third split ring resonator is coaxial with the symmetry axes of the first split ring resonator (531) and the second split ring resonator (532), and the opening direction is far away from the first split ring resonator (531) and the second split ring resonator (532).
5. The asymmetric filter network based reflectionless filter power divider of claim 4, wherein the second asymmetric filter network portion comprises a second short-circuited terminated coupling feed (61), a second open-circuited terminated coupling feed (62), a fourth split-ring resonator (631), a fifth split-ring resonator (632), and a sixth split-ring resonator (633); the second terminal short-circuit coupling feeder (61) comprises a second coupling feeder (611) and a second short-circuit ground via (612); one end of the second coupling feeder line (611) is connected with a second output port feed part (3), and the other end of the second coupling feeder line (611) is provided with the second short-circuit grounding through hole (612); one end of the second open-ended coupling feeder (62) is connected with the rear end of the fourth transmission line (422);
the fourth split ring resonator (631) and the fifth split ring resonator (632) are opposite in opening and symmetrically arranged between the second terminal short-circuit coupling feeder line (61) and the second terminal open-circuit coupling feeder line (62); the sixth split ring resonator (633) is located at one side of the fourth split ring resonator (631) and the fifth split ring resonator (632), the opening of the sixth split ring resonator is coaxial with the symmetry axes of the fourth split ring resonator (631) and the fifth split ring resonator (632), and the opening direction is far away from the fourth split ring resonator (631) and the fifth split ring resonator (632).
6. The asymmetric filter network based reflectionless filter power divider of claim 5, wherein the first through third split ring resonators (531-533) and fourth through sixth split ring resonators (631-633) have the same impedance characteristics.
7. The asymmetric filter network based reflectionless filter power divider of claim 6, wherein the first through third split ring resonators (531-533) and the fourth through sixth split ring resonators (631-633) are folded half-wavelength resonators and all have the same electrical length of 180 °.
8. The asymmetric filter network-based reflectionless filter power divider of claim 1, wherein the first asymmetric filter network portion and the second asymmetric filter network portion are the same size and spatially rotationally symmetric.
9. The reflectionless filter power divider based on an asymmetric filter network of claim 1, wherein the power divider section is a second order wilkinson power divider and has the same center operating frequency as the first asymmetric filter network section and the second asymmetric filter network section.
10. The non-reflective filter power divider based on an asymmetric filter network according to claim 1, wherein the metal ground (8) and the dielectric substrate (7) are rectangular.
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| CN202410086260.9A CN117855790A (en) | 2024-01-22 | 2024-01-22 | Non-reflection filtering power divider based on asymmetric filtering network |
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| CN202410086260.9A CN117855790A (en) | 2024-01-22 | 2024-01-22 | Non-reflection filtering power divider based on asymmetric filtering network |
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