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Control network for reducing phase noise of microstrip oscillator

A technology for controlling network and phase noise, which is applied in the field of communication, can solve the problem of high phase noise, achieve low phase noise, low cost, and good out-of-band harmonic suppression

Active Publication Date: 2021-06-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a phase noise control network for reducing the phase noise of the microstrip oscillator in order to overcome the shortcomings of the high phase noise of the existing microwave oscillator

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  • Control network for reducing phase noise of microstrip oscillator
  • Control network for reducing phase noise of microstrip oscillator
  • Control network for reducing phase noise of microstrip oscillator

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Embodiment Construction

[0021] In order to reflect the inventiveness and novelty of the present invention, the following will be described with reference to the drawings and specific embodiments, but the embodiments of the present invention are not limited thereto.

[0022] All the embodiments use a common microstrip substrate with a relative permittivity of 2.2 and a thickness of 0.508mm.

[0023] The structural parameters of the phase noise control network embodiment are marked as figure 2 As shown, among them, l 1 , l 2 , l 3 , l 4 , l 5 and l 6 Indicates the line length, w 1 、w 2 、w 3 、w 4 、w 5 and w 6 Indicates the line width, g 1 , g 2 , g 3 , g 4 , g 5 , g 6 and g 7 Indicates the gap width. The center frequency of the phase noise control network embodiment is set to 2.0GHz, and the selected structural parameter value is: 1 1 = 22mm, l 2 = 3.3mm, l 3 =2.65mm, l 4 = 1.1 mm, l 5 =2.67mm, l 6 =7.26mm,w 1 = 0.8mm, w 2 = 1 mm, w 3 = 1 mm, w 4 = 1.1 mm, w 5 = 0.5mm, w ...

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Abstract

The invention provides a phase noise control network which is used for reducing phase noise of a microstrip oscillator. The phase noise control network has a narrow-band band-pass characteristic, scattering parameters comprise four transmission zero points except for suppression at a direct current position, one transmission zero point is located on the left side of a pass band, and the other three transmission zero points are located on the right side of the pass band; and scattering parameters are provided with two transmission zeros except for suppression at a direct current position. The phase noise control network can obtain relatively low insertion loss, high group delay and good out-of-band rejection at the oscillation frequency of the microstrip oscillator, and plays an important role in reducing the phase noise of the microstrip oscillator. The embodiment of the microstrip oscillator oscillates at the frequency of 2.03 GHz, the output power is 6.43 dBm, under the frequency deviation of 100 kHz, the measured phase noise is-129.48 dBc / Hz, and the second harmonic suppression and the third harmonic suppression are 26.49 dBc and 19.1 dBc respectively.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a phase noise control network for reducing the phase noise of a microstrip oscillator. Background technique [0002] In recent years, with the rapid development of personal mobile communications and military equipment, microwave and wireless markets have attracted much attention. Microwave oscillators are an indispensable part of frequency generation sources. As key modules of phase-locked loops, frequency synthesis and clock recovery circuits, they are widely used in mobile phones, satellite communication terminals, mechanisms, radars, missile guidance systems, and military communication systems. , digital wireless communication, optical multiplexer, optical transmitter and other electronic systems. As a reference source of various frequency sources and a key device for generating time-frequency references, the phase noise of microwave oscillators has increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B15/00
CPCH04B15/00
Inventor 肖飞陈杨陈邦超黄丹孙园成
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA