Time delay equalizer for high-temperature superconduction microwave filtering group

A microwave filter and high-temperature superconducting technology, applied in waveguide devices, transmission control/equalization, electrical components, etc., can solve the problems of limited degree, limitation, design and tuning process of group delay equalization, etc., to achieve Stable performance, small insertion loss, good effect

Inactive Publication Date: 2005-09-21
NANKAI UNIV
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  • Abstract
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Problems solved by technology

But the disadvantage of this scheme is that the structure of this microstrip filter is complex, the design and tuning process are very difficult, and the degree to which it can achieve group delay equalization is limited, limited by the structure itself

Method used

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  • Time delay equalizer for high-temperature superconduction microwave filtering group
  • Time delay equalizer for high-temperature superconduction microwave filtering group
  • Time delay equalizer for high-temperature superconduction microwave filtering group

Examples

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Embodiment

[0036] The following uses an equalizer with a 4th-order single-port reflection filter to equalize an 8th-order Chebyshev filter as an example.

[0037] The group delay characteristics of the 8th-order Chebyshev filter are as follows: Figure 5 Indicated by the dotted line in . The 3dB hybrid coupler in the equalizer adopts the bent structure of the upper and lower arms. The resonator in the single-port reflection filter adopts the traditional zigzag structure, which is a half-wavelength resonator. The layout of the equalizer is as Figure 4 As shown, by adjusting the spacing of the half-wavelength resonators in the one-port reflective filter, it has the following Figure 5 The group delay characteristic shown by the mid-dotted line.

[0038] After cascading this equalizer with an 8th-order Chebyshev filter, due to the linear superposition of the phases, the filter group delay equalization is finally realized. The group delay characteristics after equalization are as follo...

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Abstract

This invention refers to analog signal process and communication technology, especially refers to the group delay equalization of high temperature superconductive filter used in high temperature superconductive film technology field, which contains high temperature superconductive microstrip filter, 3db mixing coupler and two single end reflection filter, is a plane microstrip structure and adapts for making phase equalization and reducing phase distortion to the high temperature superconductive filter of RF front end in satellite receiving system and receiving front end in base station of mobile communication system. Said invention is integrated in one medium substrate and has more stable performance.

Description

technical field [0001] The invention relates to analog signal processing and communication technology, in particular to group delay equalization technology of high temperature superconducting filter, which is applied to the field of microwave technology of high temperature superconducting thin film. Background technique [0002] High-temperature superconductors are a brand-new material for microwave engineering. Since high-temperature superconductors enter a "superconducting state" below the critical temperature, their surface resistance is almost zero, making microwave circuits made of high-temperature superconductors have many unique features. Advantages such as low loss, high Q value, low noise, and miniaturization of circuits. Among them, the high-temperature superconducting film is used, and the multi-order narrow-band microstrip bandpass filter developed by traditional semiconductor technology has extremely low insertion loss and very steep sideband characteristics, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H04B7/005
Inventor 贾颖新王建伟阎少林冯洪辉
Owner NANKAI UNIV
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