Novel controllable dual-passband filter based on SRR (Split Ring Resonator) and DS-CSRR (dual-Split Complementary Split Ring Resonator)

A dual-pass-band filter, filter technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve problems such as lack of flexibility and limiting the application of multi-pass-band radio frequency systems

Inactive Publication Date: 2015-06-03
HARBIN FEIYU TECH
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AI Technical Summary

Problems solved by technology

[0004] It should be pointed out that the bandwidth-controllable dual-band band-pass filter based on SRR and CSRR has appeared and exhibited excellent performance, but due to the lack of flexibility in designing the relative bandwidth, it is severely limited in its multi-pass band. Applications in RF systems

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  • Novel controllable dual-passband filter based on SRR (Split Ring Resonator) and DS-CSRR (dual-Split Complementary Split Ring Resonator)
  • Novel controllable dual-passband filter based on SRR (Split Ring Resonator) and DS-CSRR (dual-Split Complementary Split Ring Resonator)
  • Novel controllable dual-passband filter based on SRR (Split Ring Resonator) and DS-CSRR (dual-Split Complementary Split Ring Resonator)

Examples

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Embodiment Construction

[0026] The LC equivalent resonant circuit of the controllable double-pass band filter of the present invention is as follows Figure 4 shown. Since the SRR and DS-CSSR resonators form magnetic field coupling and electric field coupling with the feeder line respectively, the current on the feeder line will induce a magnetic field component and an electric field component orthogonal to the plane of the SRR and DS-CSRR, and then excite the corresponding magnetic resonance and electric field components. resonance. The resonant frequency of the SRR resonator is

[0027] f upper = 1 2 π L 1 C 1 - - - ( 1 )

[0028] The resonant frequency of the DS-CSRR resonator is...

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Abstract

The invention relates to a controllable dual-passband filter based on a split ring resonator (SRR) and a dual-split complementary split ring resonator (DS-CSRR). The controllable dual-passband filter uses a two-level cascade structure of a base filtering unit and comprises an input port (1), an output port (2), a first-level SRR (3), a second-level SRR (4), a first-level DS-CSRR (5), a second-level DS-CSRR (6), an upper-layer dielectric substrate (7), a middle-layer dielectric substrate (8), a lower-layer dielectric substrate (9) and a ground connection plate (10). The central frequencies of two narrow pass bands are respectively 1.02GHz and 1.50GHz, and the relative bandwidths of the two narrow pass bands are respectively 2% and 3%. The filter has the advantages that the center frequencies of the two pass bands cannot obviously affect each other when being designed and adjusted, the flexibility and the convenience of passband design of the filter are greatly improved, and the higher practical value is achieved.

Description

technical field [0001] The present invention relates to a controllable dual-passband filter based on a split-ring resonator (SRR) and a double-split complementary split-ring resonator (DS-CSRR). The frequencies are 1.02GHz and 1.50GHz respectively, and the relative bandwidths are 2% and 3% respectively. The advantage of this filter is that when designing and adjusting the center frequencies of the two passbands, they do not produce obvious mutual influence on each other, which greatly improves the flexibility and simplicity of filter passband design, and has the advantages of High practical value. Background technique [0002] Left-handed materials refer to materials with negative permittivity and magnetic permeability in a certain frequency band. It was first proposed by former Soviet physicist Veselago in 1968. The difference between left-handed materials and conventional materials is that when the permittivity and magnetic permeability are negative at the same time, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 刘雷李洪坤张冰然
Owner HARBIN FEIYU TECH
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