CN115133248A - Broadband negative group time delay microwave circuit based on laminated coupling patch - Google Patents
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- CN115133248A CN115133248A CN202210518990.2A CN202210518990A CN115133248A CN 115133248 A CN115133248 A CN 115133248A CN 202210518990 A CN202210518990 A CN 202210518990A CN 115133248 A CN115133248 A CN 115133248A
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- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
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Abstract
The invention provides a broadband negative group time delay microwave circuit based on a laminated coupling patch, which comprises: the device comprises a coupling patch, a transmission line, a dielectric plate, a metal floor, a supporting material, an input connector and an output connector; wherein: the dielectric plate comprises a lower dielectric plate and an upper dielectric plate; the coupling patches comprise a lower coupling patch and an upper coupling patch; the lower layer coupling patch is arranged on the upper surface of the lower layer dielectric slab, and the upper layer coupling patch is arranged on the lower surface of the upper layer dielectric slab; the transmission line is arranged on the upper surface of the lower dielectric slab; the metal floor is arranged on the lower surface of the lower medium plate; the lower dielectric plate and the upper dielectric plate are fixed together through a support material; the inner conductor of the input connector is connected with the transmission line, and the outer conductor of the input connector is connected with the metal floor; the inner conductor of the output connector is connected with the transmission line, and the outer conductor of the output connector is connected with the metal floor. The technical scheme of the invention solves the technical problem of large insertion loss caused by a cascading method while realizing broadband negative group delay.
Description
Technical Field
The invention relates to the technical field of microwave circuits, in particular to a broadband negative group delay microwave circuit based on a laminated coupling patch.
Background
Group delay distortion is one of the challenging problems in a circuit or a system, which introduces intersymbol interference to distort a signal, so that a delay equalization technology based on a negative group delay microwave circuit is developed, and more researchers develop researches on a high-performance negative group delay microwave circuit. In communication systems, the linearity of the amplifier is an important indicator that affects the performance of the system. The occurrence of the feed forward amplifier makes the problem of linearity relatively easy, but the disadvantage is that the volume of the used delay line is too large, which directly affects the improvement of the whole system integration, and the problem can be effectively solved by replacing the delay line with a negative group delay microwave circuit. In a wideband navigation system, distortion of the group delay causes distortion of the correlation peak, and the distortion of the correlation peak causes difficulty in determining the true position of the main peak of the correlation peak by the correlator, i.e. the center of the sampling point of the correlator may not be the true time of arrival of the signal, thereby causing the ranging deviation. Eliminating group delay deviation or reducing the influence of the group delay deviation on distance measurement is a technical problem that high-precision navigation cannot be avoided. The negative group delay microwave circuit can balance the group delay characteristic, and further improve the positioning precision of the broadband satellite navigation system.
With the development of wireless communication technology, more and more new communication standards are applied, and microwave equipment supporting broadband operation is indispensable. The working bandwidth of the microwave circuit directly affects the compatibility of the microwave equipment for broadband communication. At present, a common method for realizing a broadband negative group delay circuit is to design a single-frequency negative group delay circuit, change the center frequency of the negative group delay circuit, and finally combine two negative group delay circuits with approximate center frequencies together to realize a broadband function. However, this method requires cascading, which increases the insertion loss and circuit size of the negative group delay circuit, and is not favorable for circuit integration. Therefore, a small wideband negative group delay circuit with low loss is very necessary for the development of modern wireless communication systems.
Disclosure of Invention
According to the proposal, the invention provides a broadband negative group delay microwave circuit based on a laminated coupling patch, which aims to realize broadband negative group delay and solve the technical problem of large insertion loss caused by a cascading method. The invention realizes the broadband negative group delay without lumped elements such as RLC resonators and the like and cascade operation, and has the characteristics of low insertion loss and simple circuit structure.
The technical means adopted by the invention are as follows:
a broadband negative group time delay microwave circuit based on a laminated coupling patch comprises: the device comprises a coupling patch, a transmission line, a dielectric plate, a metal floor, a supporting material, an input connector and an output connector; wherein:
the dielectric plate comprises a lower dielectric plate and an upper dielectric plate;
the coupling patches comprise a lower coupling patch and an upper coupling patch; the lower coupling patch is arranged on the upper surface of the lower dielectric slab, and the upper coupling patch is arranged on the lower surface of the upper dielectric slab;
the transmission line is arranged on the upper surface of the lower dielectric slab;
the metal floor is arranged on the lower surface of the lower medium plate;
the support material comprises a support material I and a support material II;
the lower dielectric plate and the upper dielectric plate are fixed together through a support material;
the inner conductor of the input connector is connected with the transmission line, and the outer conductor of the input connector is connected with the metal floor; the inner conductor of the output connector is connected with the transmission line, and the outer conductor of the output connector is connected with the metal floor.
Furthermore, the lower layer coupling patch and the upper layer coupling patch are both square patches and have equal size.
Furthermore, the supporting material I and the supporting material II are respectively arranged between the lower-layer dielectric slab and the upper-layer dielectric slab and are distributed at two ends between the lower-layer dielectric slab and the upper-layer dielectric slab.
Furthermore, the heights of the supporting material I and the supporting material II are the same and can be adjusted, and the negative group delay bandwidth of the negative group delay microwave circuit is adjusted by adjusting the heights of the supporting material I and the supporting material II.
Further, the distance between the lower coupling patch and the transmission line is adjustable, and the negative group delay value at the central frequency is adjusted by adjusting the distance between the lower coupling patch and the transmission line.
Compared with the prior art, the invention has the following advantages:
1. the broadband negative group delay microwave circuit based on the laminated coupling patch can realize broadband negative group delay and solve the problem of large insertion loss caused by a cascading method.
2. The broadband negative group delay microwave circuit based on the laminated coupling patch has the advantages of low insertion loss, wide negative group delay bandwidth, simple circuit structure, simple and convenient adjustment method and the like.
Based on the reasons, the invention can be widely popularized in the fields of microwave circuits, systems and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a broadband negative group delay microwave circuit based on a laminated coupling patch according to the present invention.
Fig. 2 is a top view of the broadband negative group delay microwave circuit based on the stacked coupled patch according to the present invention.
Fig. 3 is a side view of the broadband negative group delay microwave circuit based on the stacked coupled patch of the present invention.
Fig. 4 is a group delay curve diagram of the broadband negative group delay microwave circuit based on the laminated coupled patch according to the present invention.
Fig. 5 is an S-parameter amplitude curve diagram of the broadband negative group delay microwave circuit based on the laminated coupled patch according to the present invention.
In the figure: 1. coupling patches; 11. a lower layer coupling patch; 12. an upper layer coupling patch; 2. a transmission line; 3. a dielectric plate; 31. a lower dielectric plate; 32. an upper dielectric plate; 4. a metal floor; 5. a support material; 51. a support material I; 52. a support material II; 6. an input connector; 7. and an output connector.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device 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 a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1-3, the present invention provides a broadband negative group delay microwave circuit based on a stacked coupled patch, comprising: the device comprises a coupling patch 1, a transmission line 2, a dielectric plate 3, a metal floor 4, a supporting material 5, an input connector 6 and an output connector 7; wherein:
the dielectric plate 3 includes a lower dielectric plate 31 and an upper dielectric plate 32;
the coupling patch 1 comprises a lower coupling patch 11 and an upper coupling patch 12; the lower coupling patch 11 is arranged on the upper surface of the lower dielectric slab 31, and the upper coupling patch 12 is arranged on the lower surface of the upper dielectric slab 32;
the transmission line 2 is arranged on the upper surface of the lower dielectric plate 31;
the metal floor 4 is arranged on the lower surface of the lower-layer medium plate 31;
the support material 5 comprises a support material I51 and a support material II 52;
the lower dielectric sheet 31 and the upper dielectric sheet 32 are fixed together by the support material 5;
the inner conductor of the input connector 6 is connected with the transmission line 2, and the outer conductor of the input connector 6 is connected with the metal floor 4; the inner conductor of the output connector 7 is connected to the transmission line 2, and the outer conductor of the output connector 7 is connected to the metal floor 4.
In specific implementation, as a preferred embodiment of the present invention, the lower coupling patch 11 and the upper coupling patch 12 are square patches and have equal size.
In specific implementation, as a preferred embodiment of the present invention, the support material i 51 and the support material ii 52 are respectively disposed between the lower dielectric plate 31 and the upper dielectric plate 32, and are distributed at two ends between the lower dielectric plate 31 and the upper dielectric plate 32. In the present embodiment, the support material i 51 and the support material ii 52 are both nylon materials.
In specific implementation, as a preferred embodiment of the present invention, the heights of the support material i 51 and the support material ii 52 are the same and are adjustable, and the negative group delay bandwidth of the negative group delay microwave circuit is adjusted by adjusting the heights of the support material i 51 and the support material ii 52. In this embodiment, when the heights of the support material i 51 and the support material ii 52 are adjusted to be 2mm, respectively, the negative group delay bandwidth of the negative group delay microwave circuit is adjusted to be 112 MHz.
In specific implementation, as a preferred embodiment of the present invention, the distance between the lower coupling patch 11 and the transmission line 2 is adjustable, and the negative group delay value at the center frequency is adjusted by adjusting the distance between the lower coupling patch 11 and the transmission line 2. In this embodiment, when the spacing between the lower coupling patch 11 and the transmission line 2 is adjusted to 0.35mm, the negative group delay value at the center frequency is adjusted to-0.51 ns.
Examples
In this embodiment, a broadband negative group delay microwave circuit based on a stacked coupled patch is shown, and a case where the central operating frequency of the microwave circuit is 2.45GHz will be described. As shown in fig. 4, the group delay value of the broadband negative group delay microwave circuit based on the laminated coupling patch provided by the invention at the working frequency of 2.45GHz is-0.51 ns; in the frequency range of 2.393 GHz-2.505 GHz, the group delay is negative, and the bandwidth of the negative group delay is 112MHz (the relative bandwidth is 4.7%). As shown in fig. 5, the insertion loss of the broadband negative group delay microwave circuit based on the stacked coupled patch provided by the invention is less than 4.3dB in the negative group delay working frequency range, and the return loss of the input/output port is greater than 10.0 dB. The broadband negative group delay microwave circuit based on the laminated coupling patch can realize broadband negative group delay characteristics, is low in insertion loss and has good port matching characteristics.
In summary, the broadband negative group delay microwave circuit based on the laminated coupling patch provided by the invention realizes the broadband negative group delay characteristic, has the characteristics of low insertion loss, large relative bandwidth and the like, and is very suitable for being applied to various radio frequency microwave systems.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A broadband negative group time delay microwave circuit based on a laminated coupling patch is characterized by comprising: the device comprises a coupling patch (1), a transmission line (2), a dielectric plate (3), a metal floor (4), a supporting material (5), an input connector (6) and an output connector (7); wherein:
the dielectric plate (3) comprises a lower dielectric plate (31) and an upper dielectric plate (32);
the coupling patch (1) comprises a lower coupling patch (11) and an upper coupling patch (12); the lower-layer coupling patch (11) is arranged on the upper surface of the lower-layer dielectric slab (31), and the upper-layer coupling patch (12) is arranged on the lower surface of the upper-layer dielectric slab (32);
the transmission line (2) is arranged on the upper surface of the lower-layer dielectric slab (31);
the metal floor (4) is arranged on the lower surface of the lower medium plate (31);
the supporting material (5) comprises a supporting material I (51) and a supporting material II (52);
the lower dielectric plate (31) and the upper dielectric plate (32) are fixed together through a support material (5);
the inner conductor of the input connector (6) is connected with the transmission line (2), and the outer conductor of the input connector (6) is connected with the metal floor (4); the inner conductor of the output connector (7) is connected with the transmission line (2), and the outer conductor of the output connector (7) is connected with the metal floor (4).
2. The broadband negative group delay microwave circuit based on the stacked coupled patches as claimed in claim 1, wherein the lower coupled patch (11) and the upper coupled patch (12) are both square patches and equal in size.
3. The broadband negative group delay microwave circuit based on the laminated coupling patch as claimed in claim 1, wherein the support material I (51) and the support material II (52) are respectively disposed between the lower dielectric plate (31) and the upper dielectric plate (32) and distributed at two ends between the lower dielectric plate (31) and the upper dielectric plate (32).
4. The broadband negative group delay microwave circuit based on the laminated coupling patch as claimed in claim 1, wherein the heights of the support material I (51) and the support material II (52) are the same and adjustable, and the negative group delay bandwidth of the negative group delay microwave circuit is adjusted by adjusting the heights of the support material I (51) and the support material II (52).
5. The stacked coupled patch based broadband negative group delay microwave circuit according to claim 1, wherein the lower coupled patch (11) is adjustable in distance from the transmission line (2), and the negative group delay value at the center frequency is adjusted by adjusting the distance between the lower coupled patch (11) and the transmission line (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210518990.2A CN115133248B (en) | 2022-05-12 | 2022-05-12 | Broadband negative group delay microwave circuit based on laminated coupling patch |
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| CN202210518990.2A CN115133248B (en) | 2022-05-12 | 2022-05-12 | Broadband negative group delay microwave circuit based on laminated coupling patch |
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| CN115133248B CN115133248B (en) | 2024-02-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049689A (en) * | 2005-07-15 | 2007-02-22 | Mitsubishi Electric Corp | Feed-forward amplifier |
| CN108777567A (en) * | 2018-05-23 | 2018-11-09 | 大连海事大学 | A kind of optional frequency than double frequency bear group delay microwave circuit |
| CN113328253A (en) * | 2021-05-19 | 2021-08-31 | 大连海事大学 | double-L-shaped negative group time delay microwave circuit based on asymmetric coplanar strip line |
| CN114171871A (en) * | 2021-11-16 | 2022-03-11 | 南京信息工程大学 | Non-contact adjustable negative group time delay circuit based on dielectric resonator and construction method |
-
2022
- 2022-05-12 CN CN202210518990.2A patent/CN115133248B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007049689A (en) * | 2005-07-15 | 2007-02-22 | Mitsubishi Electric Corp | Feed-forward amplifier |
| CN108777567A (en) * | 2018-05-23 | 2018-11-09 | 大连海事大学 | A kind of optional frequency than double frequency bear group delay microwave circuit |
| CN113328253A (en) * | 2021-05-19 | 2021-08-31 | 大连海事大学 | double-L-shaped negative group time delay microwave circuit based on asymmetric coplanar strip line |
| CN114171871A (en) * | 2021-11-16 | 2022-03-11 | 南京信息工程大学 | Non-contact adjustable negative group time delay circuit based on dielectric resonator and construction method |
Non-Patent Citations (2)
| Title |
|---|
| THOMAS THATAPUDI等: "The antenna impedance matching circuit using negative group delay network: Design and analysis", ANTENNAS AND PROPAGATION CONFERENCE 2019 (APC-2019) * |
| WU, LL等: "On the investigation of contactless bandpass NGD control with microstrip patch-based circuit", JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS * |
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