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Miniaturized frequency selection structure and application thereof in low-phase-noise microwave oscillator

A frequency selection and resonator technology, applied in the field of communication, can solve the problems of phase noise difference, reduce phase noise, etc., and achieve the effect of low insertion loss and high group delay

Active Publication Date: 2022-06-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantage of poor phase noise of existing microwave oscillators, provide a miniaturized frequency selection structure based on microstrip, and apply it to reduce phase noise in microwave oscillators

Method used

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  • Miniaturized frequency selection structure and application thereof in low-phase-noise microwave oscillator
  • Miniaturized frequency selection structure and application thereof in low-phase-noise microwave oscillator
  • Miniaturized frequency selection structure and application thereof in low-phase-noise microwave oscillator

Examples

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Embodiment 1

[0031] Embodiment 1 is an embodiment of a frequency selection structure. An example of annotating structural parameters is as follows Figure 8 shown, where L 1 , L 2 , L 3 , L 4 and L 5 Respectively represent the line length, W 1 , W 2 and W 3 represent the line width, respectively, g 1 , g 2 , g 3 and g 4 Respectively represent the gap width, D 1 and D 2 Indicate the diameters of the first metallized ground via (G1) and the second metallized ground via (G2), respectively. The intermediate frequency of the first embodiment is set to 2.0GHz, and the normalized coupling coefficient matrix is ​​obtained as

[0032]

[0033] According to these normalized coupling coefficients, the ideal coupling coefficient k can be calculated ij and the external quality factor Q e , which is used to determine the initial value of the structural parameters of the frequency-selective structure. After electromagnetic simulation optimization, a set of structural parameter values ...

Embodiment 2

[0034] The second embodiment is an oscillator embodiment based on a frequency selective structure. Figure 12 and 13 It is the test result of Example 2. The second embodiment works at 2.01GHz, and the output power is 8.32dBm. The phase noise at 100kHz deviation from the oscillation frequency is -128.59dBc / Hz@100kHz, and the phase noise at 1MHz deviation from the oscillation frequency is -146.4dBc / Hz@1MHz.

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Abstract

The invention relates to a miniaturized frequency-selecting structure and application thereof in a low-phase noise microwave oscillator, and provides a microstrip-based frequency-selecting structure, which is characterized in that a first port (P1) is connected to a middle point of a first line section (X1); one end of the first line section (X1) is connected with the first multi-finger structure (F1), and the other end of the first line section (X1) is connected to the second metalized grounding hole (G2); the second port (P2) is connected to a middle point of the second line section (X2); one end of the second line section (X2) is connected with the second multi-finger structure (F2), and the other end of the second line section (X2) is connected to the second metalized grounding hole (G2); one end of the bending resonator (FR) is connected with the first metalized grounding hole (G1); the first multi-finger structure (F1), the second multi-finger structure (F2) and the bending resonator (FR) are mutually coupled. The frequency selection structure has the advantages of low insertion loss, high group delay and miniaturization. The oscillator based on the frequency selection structure has the advantages of low phase noise, high output power and the like, and has remarkable technical progress.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a miniaturized frequency selection structure and its application in a low phase noise microwave oscillator. Background technique [0002] In recent years, with the rapid development of personal mobile communications and military equipment, the microwave and wireless markets have attracted much attention. Microwave oscillator is an indispensable part of frequency generation source. As a key module of phase-locked loop, frequency synthesis and clock recovery circuits, it is widely used in mobile phones, satellite communication terminals, mechanisms, radars, missile guidance systems, and military communication systems. , digital wireless communications, optical multiplexers, optical transmitters and other electronic systems. As the reference source of various frequency sources and the key device for generating time-frequency reference, the phase noise of microwave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/10G06F30/36G06F30/367
CPCH03B5/10G06F30/36G06F30/367Y02D30/70
Inventor 肖飞何俊岭邵兰淳黄丹郭济肖礼康曹煜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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