Microwave attenuator based on novel topological structure

A topological structure and microwave attenuation technology, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as poor flatness in the band, attenuator standing wave difference, complex process implementation, etc., and achieve small reflection signals and parasitic parameters. Less, process to achieve simple effect

Active Publication Date: 2014-07-23
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At higher frequencies, such as in the Ka band, traditional Pi-type attenuators and T-type attenuators have the following problems: the parasitic parameters of the resistor itself, the microstrip connected to the resistor, etc. are greatly affected, resulting in a standing wave difference of the attenuator, which needs to be redesigned When the matching circuit is designed, the attenuation value dev

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  • Microwave attenuator based on novel topological structure
  • Microwave attenuator based on novel topological structure
  • Microwave attenuator based on novel topological structure

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Embodiment Construction

[0022] The specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] Such as figure 1 Shown, the present invention is a kind of microstrip based on novel topological structure, including several levels of periodic absorption structures A 1 …A n , Thin film resistance R n+1 , matching microstrip line Z 0 , several levels of periodic absorbing structures A 1 …A n including low-impedance microstrip lines L 1 …L n and resistor R 1 …R n , matching the microstrip line Z 0 Match the microstrip line to a 50 ohm characteristic impedance.

[0024] Low impedance microstrip line (L 1 …L n ) and resistance (R 1 …R n ) in series to form the periodic absorption structure A 1 …A n .

[0025] Matched microstrip line L 0 with the first stage periodic absorbent structure A 1 The resistors are connected in series, and the first to nth periodic absorption structures are cascaded in pairs, and the low-impe...

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Abstract

A microwave attenuator based on a novel topological structure comprises a plurality of periodical absorption structures, thin-film resistors and matched microstrip lines. Each periodical absorption structure comprises a low-impedance microstrip line and a resistor, grounding through punching is not needed, even absorption of high-frequency microwave signal energy is achieved, attenuation values of microwave signals of various frequencies in a working bandwidth are the same, reflection signals of any frequencies in the bandwidth can be reduced to an extremely-low level, and good matching is achieved. Compared with a traditional thin-film resistance attenuator, application frequency is substantially improved, in-band standing waves are improved, in-band flatness is good, punching is not needed, and the technology can be realized more easily.

Description

technical field [0001] The invention relates to a topology structure of a microwave attenuator, in particular to a microstrip attenuator comprising several periodic absorption structures, thin film resistors, and 50-ohm characteristic impedance microstrip lines, belonging to the field of microwave design. Background technique [0002] Attenuators are common components in microwave RF systems. Attenuators based on planar structures are a common circuit form in attenuator circuits, including Pi-type attenuators and T-type attenuators, which usually work in the frequency band below X. However, with the rapid development of communication, remote sensing, navigation and other industries and the continuous advancement of science and technology, the operating frequency of microwave radio frequency systems has been continuously improved, and Ka-band and even higher millimeter-wave frequency band microwave systems have begun to be used. [0003] At higher frequencies, such as in the...

Claims

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Application Information

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IPC IPC(8): H01P1/22
Inventor 李斌赵慧敏张波徐辉王毅
Owner XIAN INSTITUE OF SPACE RADIO TECH
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