CN108847517B - Coplanar waveguide series capacitor resonator with adjustable frequency - Google Patents
Coplanar waveguide series capacitor resonator with adjustable frequency Download PDFInfo
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- CN108847517B CN108847517B CN201810659988.0A CN201810659988A CN108847517B CN 108847517 B CN108847517 B CN 108847517B CN 201810659988 A CN201810659988 A CN 201810659988A CN 108847517 B CN108847517 B CN 108847517B
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Abstract
The invention relates to a coplanar waveguide series capacitor resonator with adjustable frequency, which comprises a first layer of dielectric material A, a second layer of dielectric material B and a third layer of dielectric material C, wherein a first metal layer A1, a second metal layer A2, a third metal layer A3, a fourth metal layer A4 and a fifth metal layer A5 are arranged on the first layer of dielectric material A, the second layer of dielectric material B is a dielectric material with adjustable dielectric constant, an earth plate metal layer C1 is printed on the third layer of dielectric material C, the input end of the resonator is arranged on the left side of the first layer of dielectric material A, and the output end of the resonator is arranged on the right side of the first layer of dielectric material A. According to the coplanar waveguide series capacitor resonator, the dielectric constant of the dielectric material B is changed, so that the boundary condition between the first layer of dielectric material A and the second layer of dielectric material B is changed, the resonance frequency point of the resonator is changed, and the coplanar waveguide series capacitor resonator with adjustable frequency is realized.
Description
Technical Field
The invention belongs to the technical field of electromagnetic fields and microwaves, and particularly relates to a frequency-adjustable resonator, in particular to a frequency-adjustable coplanar waveguide (CPW) series capacitor resonator.
Background
With the rapid development of wireless communication business, frequency resources are increasingly tense, in order to improve the utilization rate of frequency spectrum resources, and frequency spectrum technologies such as spread spectrum, frequency hopping, dynamic frequency allocation and the like are widely applied, and as a key component of a radio frequency front end, a dual-frequency and multi-frequency band-pass filter has gradually become a research hotspot due to the advantages of compact structure, convenience in system integration, capability of reducing power consumption and the like, and as one of key devices of a microwave receiver and an electronic countermeasure system, an adjustable microstrip filter is increasingly emphasized.
In the design of microwave passive devices, resonators are basic design elements in many microwave elements, and have the characteristics of energy storage and frequency selection, and based on the characteristics, the application of the resonators can be expanded to the design of microwave devices such as filters, oscillators and the like, so that the tunable frequency resonators can also influence the development of microwave integrated circuits to a certain extent.
1982, the concept of tunable reconfigurable resonator was first proposed by L c.hunter, the tunable resonator designed initially was a comb-line structure, the varactor was loaded on the end of the comb-line resonator, and the capacitance thereof was changed to change the equivalent length of the comb-line, thereby changing the center frequency of the resonator passband, and then many foreign researchers made many structural improvements based on this, and designed many new tunable resonators, such as tunable resonators working in dual-band or multi-band, and tunable resonators based on dual-mode resonant structure.
Disclosure of Invention
The invention provides a coplanar waveguide (CPW) series capacitor resonator with adjustable frequency, aiming at the defect that the frequency of the resonator can not be adjusted, the CPW series capacitor resonator has simple structure and easy processing, and the frequency of the resonator can be adjusted by adjusting the dielectric constant of an intermediate layer dielectric material such as a liquid crystal material.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention relates to a coplanar waveguide series capacitor resonator with adjustable frequency, which comprises a first layer of dielectric material A, a second layer of dielectric material B and a third layer of dielectric material C, wherein a first metal layer A1, a second metal layer A2, a third metal layer A3, a fourth metal layer A4 and a fifth metal layer A5 are arranged on the first layer of dielectric material A, the second layer of dielectric material B is a dielectric material with adjustable dielectric constant, an earth plate metal layer C1 is printed on the third layer of dielectric material C, the input end of the resonator is arranged on the left side of the first layer of dielectric material A, and the output end of the resonator is arranged on the right side of the first layer of dielectric material A. Coplanar waveguide series capacitor resonator capable of adjusting frequency
The invention is further improved in that: the dielectric material with adjustable dielectric constant is liquid crystal and polymer dispersed liquid crystal.
The invention is further improved in that: the dielectric material with the adjustable dielectric constant is in a liquid state or a solid state and is in a thin film state.
The invention is further improved in that: the thickness of the dielectric material with the adjustable dielectric constant is 10 micrometers-1 millimeter.
The invention is further improved in that: the resonator further comprises an orientation layer.
The invention is further improved in that: the orientation layers are positioned between the first metal layer A1, the second metal layer A2, the third metal layer A3, the fourth metal layer A4, the fifth metal layer A5 and the second layer dielectric material B, or the orientation layers are positioned between the ground plate metal layer C1 and the second layer dielectric material B, or the orientation layers are positioned above and below the second layer dielectric material B.
The invention is further improved in that: the first layer of dielectric material A and the third layer of dielectric material C are hard substrates or flexible substrates.
The invention is further improved in that: the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 are disposed on the back or front side of the first layer of dielectric material a.
The invention is further improved in that: the ground plane metal layer C1 is printed above or below the third layer of dielectric material C.
The invention is further improved in that: the dielectric constant of the dielectric material with the adjustable dielectric constant is regulated and controlled by external fields such as an electric field, a magnetic field, an optical field, temperature and the like.
The invention has the beneficial effects that: (1) the resonator can change the resonance frequency point of the resonator by adjusting the dielectric constant of the dielectric material with the adjustable dielectric constant in the middle layer, such as the dielectric constant of a liquid crystal material; (2) the dielectric constant of the dielectric material with adjustable dielectric constant, such as a liquid crystal material, can be adjusted by an electric field, a magnetic field, an optical field or temperature, is accurately controlled, and has wide applicability; (3) the central conductor is connected with the metal ground without a via hole, so that the structure is simple, and the processing and the testing are convenient.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a left side view of the present invention.
Fig. 4 is a schematic structural diagram of a first layer of dielectric material a of the invention.
FIG. 5 is a structural diagram of a second dielectric material layer B according to the present invention.
Fig. 6 is a schematic structural diagram of a third layer of dielectric material according to the present invention.
Detailed Description
For a better understanding of the present invention, reference will now be made to the following examples, which are set forth to illustrate, but are not to be construed as the limit of the present invention.
As shown in fig. 1-6, the present invention is a frequency-tunable coplanar waveguide series capacitor resonator, specifically a frequency-tunable coplanar waveguide series capacitor resonator formed by using dielectric materials with variable dielectric constants, the resonator is divided into three layers, for convenient representation, the three parts of the resonator are disassembled, as shown in fig. 1, the resonator comprises a first layer of dielectric material a, a second layer of dielectric material B and a third layer of dielectric material C, a first metal layer a1, a second metal layer a2, a third metal layer A3, a fourth metal layer a4 and a fifth metal layer a5 are disposed on the first layer of dielectric material a, the second layer of dielectric material B is a dielectric material with adjustable dielectric constants, a ground plate metal layer C1 is printed on the third layer of dielectric material C, the input end of the resonator is on the left side of the first layer of dielectric material a, the output end of the resonator is arranged on the right side of the first layer of dielectric material A, the invention changes the boundary condition between the first layer of dielectric material A and the second layer of dielectric material B by changing the dielectric constant of the dielectric material B, thereby changing the resonance frequency point of the resonator, and realizing the coplanar waveguide series capacitor resonator with adjustable frequency, as shown in figure 2, under the general condition, the first layer of dielectric material A is wider, two sides of the first layer of dielectric material A extend out of the CPW electrode to facilitate feeding, as shown in figure 3, under the general condition, the third layer of dielectric material C is wider, two ends extend out of the metal ground electrode to facilitate connection, the first layer of dielectric material A and the third layer of dielectric material C are hard substrates such as Roger4003, or can be formed by flexible substrates such as polyimide, the first metal layer A1, the second metal layer A2, the third metal layer A3 on the first layer of dielectric material A, The fourth metal layer a4 and the fifth metal layer a5 are made of conductive materials with good conductivity, such as copper and silver, the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 form a coplanar waveguide, the middle conductor formed by the second metal, the middle conductor formed by the third metal layer and the middle conductor formed by the fourth metal layer form two back-to-back C-shaped slot lines, the slot lines are in a central symmetrical pattern and can be equivalently connected in series to form two capacitors to form a stub-loaded resonator, the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 are arranged on the back or front side of the first layer dielectric material a, that is, the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 are located at positions determined by the thickness of the first layer dielectric material a, generally, the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 are disposed on the back side of the first dielectric layer a, that is, at the boundary between the first dielectric layer a and the second dielectric layer B, the resonator can realize the function of frequency tuning, but if the first dielectric layer a is very thin, the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 can also be disposed on the front side of the first dielectric layer a, and the ground plate metal layer C1 is printed on or under the third dielectric layer C and is implemented by a conductive material with good conductivity, such as copper and silver.
As shown in fig. 5, the second layer of dielectric material is made of a dielectric material with an adjustable point constant, the dielectric material with an adjustable dielectric constant is liquid crystal or polymer dispersed liquid crystal, the thickness of the dielectric material with an adjustable dielectric constant is 10 micrometers to 1 millimeter, the dielectric material with an adjustable dielectric constant is a liquid or solid liquid crystal material in a thin film state, the dielectric constant of the dielectric material with an adjustable dielectric constant is controlled by external fields such as an electric field, a magnetic field, an optical field, and temperature, that is, the dielectric constant of the dielectric material with an adjustable dielectric constant can be controlled by an electric field, and the specific operation mode is that voltages are respectively applied to a metal layer on the first layer of dielectric material a and a metal layer on the third layer of dielectric material C to control; the light field can be used for regulation and control, and the specific operation mode is that the third layer of dielectric material adopts transparent material, such as polyvinyl chloride, the metal layer C1 on the third layer of dielectric material C is eliminated, and the light source with different intensities passes through the third layer of dielectric material for regulation and control; in addition, the temperature can be regulated and controlled, the specific operation mode is that a metal coil is additionally arranged below the third layer of dielectric material, the temperature on the coil is changed by changing the current in the metal coil, and the controllable temperature is transmitted to the resonator for regulation and control.
The resonator further comprises an orientation layer, wherein the orientation layer is positioned between the first metal layer A1, the second metal layer A2, the third metal layer A3, the fourth metal layer A4, the fifth metal layer A5 and the second layer dielectric material B, or between the ground plate metal layer C1 and the second layer dielectric material B, or is positioned above and below the second layer dielectric material B, the orientation layer is not shown in the figure, and the orientation layer is made of polymer materials, such as polyimide, a photo-orientation agent SD1 or dielectric material silicon dioxide.
Claims (6)
1. A frequency-tunable coplanar waveguide series capacitor resonator, comprising: the resonator comprises a first layer of dielectric material A, a second layer of dielectric material B and a third layer of dielectric material C, wherein a first metal layer A1, a second metal layer A2, a third metal layer A3, a fourth metal layer A4 and a fifth metal layer A5 are arranged on the first layer of dielectric material A, the second layer of dielectric material B is a dielectric material with an adjustable dielectric constant, a ground plate metal layer C1 is printed on the third layer of dielectric material C, the input end of the resonator is arranged on the left side of the first layer of dielectric material A, the output end of the resonator is arranged on the right side of the first layer of dielectric material A, the resonator further comprises an orientation layer, the orientation layer is positioned between the first metal layer A1, the second metal layer A2, the third metal layer A3, the fourth metal layer A4, the fifth metal layer A5 and the second layer of dielectric material B, or the orientation layer is positioned between the ground plate metal layer C1 and the second layer of dielectric material B, or the orientation layers are positioned above and below the second layer of dielectric material B, the dielectric material with the adjustable dielectric constant is liquid crystal which is in a liquid state or a solid state and is in a film state, the dielectric constant of the dielectric material with the adjustable dielectric constant is regulated and controlled by an electric field, a magnetic field, an optical field and temperature, a middle conductor formed by the second metal, a middle conductor formed by the third metal layer and a middle conductor formed by the fourth metal layer form two back-to-back C-shaped slot lines, the slot lines are in a central symmetry pattern and equivalently form two capacitors which are connected in series, and thus the stub-loaded resonator is formed.
2. A frequency tunable coplanar waveguide series capacitor resonator as set forth in claim 1, wherein: the dielectric material with the adjustable dielectric constant is liquid crystal and polymer dispersed liquid crystal.
3. A frequency tunable coplanar waveguide series capacitor resonator as set forth in claim 1, wherein: the thickness of the dielectric material with the adjustable dielectric constant is 10 micrometers-1 millimeter.
4. A frequency tunable coplanar waveguide series capacitor resonator as set forth in claim 1, wherein: the first layer of dielectric material A and the third layer of dielectric material C are hard substrates or flexible substrates.
5. A frequency tunable coplanar waveguide series capacitor resonator as set forth in claim 1, wherein: the first metal layer a1, the second metal layer a2, the third metal layer A3, the fourth metal layer a4 and the fifth metal layer a5 are disposed on the back or front side of the first layer of dielectric material a.
6. A frequency tunable coplanar waveguide series capacitor resonator as set forth in claim 1, wherein: the ground plane metal layer C1 is printed above or below the third layer of dielectric material C.
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| CN111969289B (en) * | 2020-08-19 | 2021-10-08 | 南通大学 | Low-profile frequency reconfigurable dielectric patch resonator |
| CN112186315A (en) * | 2020-09-28 | 2021-01-05 | 努比亚技术有限公司 | Double-frequency filter and mobile terminal |
| WO2023240463A1 (en) * | 2022-06-14 | 2023-12-21 | 京东方科技集团股份有限公司 | Adjustable radio-frequency unit, filter and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466307A (en) * | 2014-11-24 | 2015-03-25 | 电子科技大学 | Phase shifter |
| CN107611535A (en) * | 2017-08-23 | 2018-01-19 | 电子科技大学 | Liquid crystal microwave device based on polymorphic structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466307A (en) * | 2014-11-24 | 2015-03-25 | 电子科技大学 | Phase shifter |
| CN107611535A (en) * | 2017-08-23 | 2018-01-19 | 电子科技大学 | Liquid crystal microwave device based on polymorphic structure |
Non-Patent Citations (2)
| Title |
|---|
| ANALYSIS OF SLOT-LOADED END-COUPLED RESONATOR CPW BANDPASS FILTERS;MAN-LONG HER et al.;《Proceedings of APMC2001, Taipei, Taiwan, R.O.C.》;20011231;第2、3部分，图2 * |
| Tunable Liquid-Crystal Millimeter-wave Bandpass Filter Using Periodical Structure;Mani Yazdanpanahi et al.;《2014 IEEE Radio and Wireless Symposium(RWS)》;20140123;第II、III部分，图2 * |
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Application publication date: 20181120 Assignee: NANJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS INSTITUTE AT NANTONG Co.,Ltd. Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS Contract record no.: X2020980006914 Denomination of invention: A coplanar waveguide series capacitor resonator with adjustable frequency Granted publication date: 20200728 License type: Common License Record date: 20201021 |
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