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Coupling structure of high-temperature superconductive filter for adjusting-free satellite communication and making process

A satellite communication and high-temperature superconducting technology, which is applied in waveguide devices, radio relay systems, active electrical relay systems, etc., can solve problems such as power loss and instability of pre-unit circuits

Inactive Publication Date: 2006-03-22
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This not only directly causes power loss, but also may lead to the instability of the pre-stage unit circuit in some demanding occasions.

Method used

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  • Coupling structure of high-temperature superconductive filter for adjusting-free satellite communication and making process
  • Coupling structure of high-temperature superconductive filter for adjusting-free satellite communication and making process
  • Coupling structure of high-temperature superconductive filter for adjusting-free satellite communication and making process

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Effect test

Embodiment Construction

[0023] for figure 1 The symmetric structure can be synthesized using odd and even mode theory. Reflection coefficient S11, transmission coefficient S21 and odd-mode reflection coefficient Г o , even-mode reflection coefficient Г e The relationship between is:

[0024] S 11 = Γ e + Γ o 2

[0025] S 21 = Γ e - Γ o 2

[0026] Odd-mode reflection coefficient Г o , even-mode reflection coefficient Г e Normalize the input admittance y with the odd modulus o , even-mode normalized input admittance y e The relationship is:

[0027] Γ o ...

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Abstract

A regulation-free coupling structure of a high-temperature super conduction filter used in satellite communication characterizes in inserting sections of L transmission lines in the same process technology with the resonator and tap and finished at one run in a suitable place between two resonators connected by wires at both sides of a bandpass filter and another resonator slantly opposite to them suitable for the design of frequency preselector of satellite receiving system RF front end or the base station front end in mobile communication system. Reflection loss in pass-band reduces to -20dB from original-15dB and transmission efficiency S21 is improved.

Description

technical field [0001] The invention relates to a coupling structure of a high-temperature superconducting filter for a tuning-free satellite communication, which belongs to the technical field of analog signal processing and communication, and in particular relates to the technical field of a radio frequency front end of a satellite communication receiving system or a frequency preselector of a base station front end in a mobile communication system. Background technique [0002] The traditional filter synthesis method based on the low-pass prototype composed of lumped parameter elements, when doing low-pass to band-pass frequency conversion, only at the center frequency f 0 It is accurate, but there are errors in other frequencies, especially in the stop band, there will be a large error. On the other hand, when the lumped parameter element is replaced by a microwave structure, errors will also be introduced. For example, a semi-open structure microstrip line is used to fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/15H01P1/20
Inventor 洪兴楠汤佳霖何豫生何艾生
Owner TSINGHUA UNIV