CN118573146A - Matching load circuit based on slow wave effect of high-order lossy filter - Google Patents
Matching load circuit based on slow wave effect of high-order lossy filter Download PDFInfo
- Publication number
- CN118573146A CN118573146A CN202410620547.5A CN202410620547A CN118573146A CN 118573146 A CN118573146 A CN 118573146A CN 202410620547 A CN202410620547 A CN 202410620547A CN 118573146 A CN118573146 A CN 118573146A
- Authority
- CN
- China
- Prior art keywords
- lossy
- order
- filter
- slow wave
- wave effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000694 effects Effects 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 12
- 238000004891 communication Methods 0.000 abstract description 7
- 238000005457 optimization Methods 0.000 abstract description 6
- 230000010354 integration Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000013473 artificial intelligence Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to the technical field of wireless communication systems and discloses a matching load circuit based on a slow wave effect of a high-order lossy filter. By adopting the high-order lossy interdigital bandpass filter as a core structure, the propagation speed of electromagnetic waves is slowed down by utilizing the slow wave effect, and the signal transmission time and the effective propagation path are prolonged, so that the impedance matching is optimized. The design utilizes the multistage structure of the high-order lossy filter and the artificial intelligence optimization technology, realizes fine regulation and more compact frequency regulation and control, and enables the circuit design to be more efficient and miniaturized. By absorbing and converting electromagnetic energy, the system provides higher integration level and usability, is suitable for microwave measurement, wireless communication and radar systems, has wide application prospect, and brings more intelligent and efficient matching solutions for industries.
Description
Technical Field
The invention belongs to the technical field of wireless communication systems, and particularly relates to a matching load circuit based on a slow wave effect of a high-order lossy filter.
Background
The matching load is a key single-port passive device used in a microwave circuit and is mainly used for absorbing input electromagnetic energy so as to improve the matching performance of the circuit. Is widely applied in the fields of microwave measurement systems, communication systems, radars and the like. The traditional waveguide matching load usually adopts structures such as rectangular waveguide, circular waveguide or coaxial line, and the three-dimensional structures cause larger device size, higher cost and complex processing, and are not easy to integrate with modern microwave circuit systems. As communication systems move to higher frequencies, these conventional matching loads have been difficult to meet the demands for miniaturization, low cost, and high integration. Therefore, research and development of planarization, miniaturization, and low-profile matching loads are of great significance in promoting development of the microwave circuit field.
The slow wave effect slows down the propagation speed of electromagnetic waves in the system, so that the circuit length is effectively increased, more circuit elements are realized in a limited physical space, and the miniaturization design is facilitated. The multistage structure of the high-order lossy filter can realize complex frequency regulation and control in a more compact space, so that the overall design is more efficient and miniaturized. By combining the slow wave effect and the high-order lossy filter, more precise frequency response and performance optimization can be realized, and the method plays an important role in matching load design. The patent aims to solve the problems of large size, high cost, complex processing and the like of the traditional matching load and aims to provide a matching load solution with high performance, low cost and easy integration. The defect of the prior art is filled, and innovation and application prospect are brought to the development of microwave circuits and systems.
Disclosure of Invention
The invention aims to provide a matching load circuit based on a slow wave effect of a high-order lossy filter, which takes the high-order lossy interdigital bandpass filter as a core structure, and fully utilizes the slow wave effect of the high-order filter, thereby realizing the planar matching load design of a microstrip form. The design has the advantages of low cost, small size, low profile, easy integration, easy processing and assembly, and the like, and simultaneously realizes multi-parameter optimization and adjustment by means of an artificial intelligence algorithm so as to improve the matching load performance. The innovative design is suitable for microwave measurement, wireless communication, radar and other systems, and a more intelligent and efficient matching scheme is brought to the fields.
The invention is realized in such a way that a matching load circuit based on the slow wave effect of a high-order lossy filter has a core structure of a high-order lossy interdigital bandpass filter (7), adopts a single-layer dielectric substrate structure with two metal layers, and comprises a dielectric substrate (2), a metal micro-strip layer (1) and a metal grounding plate (3); the microstrip input port (4) is a microstrip line with impedance of 50 ohms; the dielectric substrate (2) is a lossy dielectric substrate, the metal micro-strip layer (1) is connected with the metal grounding plate (3) through the metal through holes (5), the metal micro-strip layer (1) is arranged on the upper surface of the lossy dielectric substrate (2), and the metal grounding plate (3) is arranged on the lower surface of the lossy dielectric substrate (2); the high-order lossy interdigital bandpass filter (7) consists of 45 quarter-wavelength microstrip resonators (6) with open ends and short circuits at one ends, the microstrip resonators (6) adopt a parallel coupling mode, and the input/output ends of the high-order lossy interdigital bandpass filter (7) are magnetically coupled with the microstrip resonators (6) in a tap mode.
The invention provides a matching load circuit based on a slow wave effect of a high-order lossy filter, which has the following working principle:
The microwave signal is firstly input through a signal input port matched with a load, and then enters a high-order lossy interdigital bandpass filter. When passing through the high-order lossy interdigital filter, electromagnetic energy of the microwave signal is absorbed by a lossy dielectric substrate and converted into heat energy. In the process, the slow wave effect plays a role, so that the propagation speed of electromagnetic waves in a medium is obviously slowed down, and the transmission time of signals in a system is prolonged. The unabsorbed microwave signal electromagnetic energy is then reflected when reaching the terminal. This reflected electromagnetic energy is passed along back to the higher-order lossy interdigital bandpass filter and again absorbed step-by-step and converted to thermal energy. By adjusting the slow wave effect, the electromagnetic energy of the microwave signal can be almost ignored when the microwave signal is reversely transmitted to the input end, and good impedance matching is realized. This ensures the effectiveness of signal transmission while providing more propagation paths using the slow wave effect, helping to adequately absorb the signal and achieve excellent impedance matching.
The invention provides a matching load based on a slow wave line response of a high-order lossy filter, which is easy to integrate into other circuits and is suitable for millimeter wave/terahertz circuits and systems; the method has the advantages that through the slow wave effect of the high-order lossy filter, the propagation speed of electromagnetic waves in a medium is slowed down, the circuit length is effectively increased, and meanwhile, the high-order lossy filter with a multi-stage structure is combined, so that more compact frequency regulation and control are realized, and efficient miniaturization is designed; the method realizes accurate design parameter optimization through the assistance of an artificial intelligence optimization technology, so that the method has the advantages of low cost, small size, low profile, easiness in integration, easiness in processing and assembly and the like. The innovative design has wide application prospect in microwave measurement, wireless communication, radar and other systems, and can bring more intelligent and efficient matching solutions to the fields.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a matched load circuit based on the slow wave effect of a high order lossy filter provided by an embodiment of the invention;
Fig. 2 is an S-parameter simulation graph of a matching load circuit based on a slow wave effect of a high-order lossy filter according to an embodiment of the present invention;
In the figure: 1. a metal microband layer; 2. a dielectric substrate; 3. a metal grounding plate; 4. a microstrip input port; 5. metallizing the through holes; 6. a microstrip resonator; 7. higher order lossy interdigital bandpass filters.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following are examples and implementation schemes provided by the invention:
The structure of the matching load circuit based on the slow wave effect of the high-order lossy filter in this embodiment is shown in fig. 1, the core structure is a high-order lossy interdigital bandpass filter, and the center frequency is 8.315GHz. The circuit was realized using an FR-4 dielectric substrate having a loss tangent of 0.02, a dielectric constant of 4.4, and a thickness of 0.508 mm. After the microwave signal enters the high-order lossy interdigital filter from the 50 omega microstrip input port, the microwave signal energy is almost completely absorbed by the miniaturized planar matching load after the microwave signal is reflected by the terminal and reversely transmitted to the input port. The design ensures good impedance matching of the input port, effectively eliminates residual microwave signal energy, and improves the performance and efficiency of the whole system. And the genetic algorithm is introduced to perform artificial intelligent optimization, the return loss of the matched load is used as a target, and each parameter of the model is optimized and adjusted, so that the design is more intelligent.
Fig. 2 is an S-parameter simulation curve of the input port of the matching load circuit based on the slow wave effect of the high-order lossy filter of the present embodiment. It can be seen from the graph that the high-frequency-response-type antenna has good matching performance in the frequency range of 7GHz-9.63GHz (relative bandwidth of 31.6%), and the input return loss is more than 20dB. The overall electrical length of the miniaturized planar matching load is about 1.77 wavelengths.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (4)
1. A matching load circuit based on a slow wave effect of a high-order lossy filter is characterized by comprising a metal micro-strip layer, a dielectric substrate and a metal grounding plate. The dielectric substrate is a consumable dielectric substrate and plays a key role, and the metal micro-strip layer and the metal grounding plate are connected through the metallized through holes, so that a complete circuit structure is constructed. The metal micro-strip layer covers the upper surface of the lossy dielectric substrate, and the metal grounding plate is positioned on the lower surface of the lossy dielectric substrate.
2. The matching load circuit based on the slow wave effect of the high-order lossy filter according to claim 1, wherein the high-order lossy interdigital bandpass filter is used as a core structure, the high-order lossy interdigital bandpass filter is composed of 45 quarter-wavelength microstrip resonators with open ends and short circuits at one end, and the microstrip resonators are in parallel coupling mode.
3. The matching load circuit based on the slow wave effect of the high-order lossy filter according to claim 1, wherein the slow wave effect of the high-order lossy filter is utilized to slow down the propagation speed of electromagnetic waves in a lossy medium, thereby effectively increasing the circuit length and prolonging the transmission time of signals in the lossy medium.
4. The matched load circuit based on the slow wave effect of a high order lossy filter according to claim 1, wherein the microwave signal is first input via the signal input port of the matched load and then enters the high order lossy interdigital bandpass filter. When passing through the high-order lossy interdigital filter, electromagnetic energy of the microwave signal is absorbed by a lossy dielectric substrate and converted into heat energy. The unabsorbed microwave signal electromagnetic energy is then reflected when reaching the terminal. This reflected electromagnetic energy is passed along back to the higher-order lossy interdigital bandpass filter and again absorbed step-by-step and converted to thermal energy. Electromagnetic energy of the microwave signal is almost negligible when transmitted back to the input, achieving good impedance matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410620547.5A CN118573146A (en) | 2024-05-20 | 2024-05-20 | Matching load circuit based on slow wave effect of high-order lossy filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410620547.5A CN118573146A (en) | 2024-05-20 | 2024-05-20 | Matching load circuit based on slow wave effect of high-order lossy filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118573146A true CN118573146A (en) | 2024-08-30 |
Family
ID=92464743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410620547.5A Pending CN118573146A (en) | 2024-05-20 | 2024-05-20 | Matching load circuit based on slow wave effect of high-order lossy filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118573146A (en) |
-
2024
- 2024-05-20 CN CN202410620547.5A patent/CN118573146A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112993507B (en) | Miniaturized T-shaped branch waveguide broadband power divider | |
| CN113270705B (en) | Microstrip line probe conversion structure of millimeter wave transceiver antenna | |
| CN112928409A (en) | Microstrip band-pass filter with wide stop band and high selectivity | |
| CN110190371B (en) | Waveguide power divider | |
| CN207368186U (en) | A kind of bandstop filter and communication equipment | |
| CN103474729A (en) | Multi-frequency band elimination filter | |
| CN116646700A (en) | W-band ultra-wideband waveguide filter | |
| CN115473025B (en) | Waveguide difference port magic T based on microstrip-waveguide hybrid integration | |
| CN118573146A (en) | Matching load circuit based on slow wave effect of high-order lossy filter | |
| CN202564510U (en) | Low loss radiofrequency plane integration band-pass filter | |
| CN110212275B (en) | Millimeter wave waveguide matching load based on lossy dielectric substrate | |
| CN114566778A (en) | Straight-through waveguide microstrip transition structure based on wide conduction band | |
| CN209747694U (en) | Low-pass filter with complementary split resonant ring and U-shaped groove defected ground | |
| CN115020952B (en) | Miniaturized plane matching load | |
| CN201629391U (en) | Mini-circulator for microwave communication system | |
| Gopalakrishnan et al. | Design of power divider for C-band operation using high frequency defected ground structure (DGS) technique | |
| CN104505567A (en) | Substrate integrated waveguide circulator | |
| CN114824702B (en) | Miniaturized ultra-wideband stop band plane band-pass filter | |
| CN115084807B (en) | Hybrid suspension linewidth band filter | |
| CN118539119B (en) | Non-reciprocal coaxial filter based on space-time modulation | |
| CN115411474B (en) | Rectangular waveguide-overmode coaxial waveguide mode converter | |
| CN115764225B (en) | Waveguide power divider | |
| Wang et al. | A compact band-stop filter with wide bandwidth and far spurious stop bands | |
| Liu et al. | A Compact filter based on Substrate Integrated Coaxial Line Technology | |
| CN117374551A (en) | Low-profile waveguide matching load based on SIW single-mode lossy resonant cavity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |