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Optimum design method based on overall performance of terahertz frequency band device

An optimized design, terahertz technology, applied in instrumentation, computing, special data processing applications, etc., can solve the problems of inability to use branch matching impedance matching structure, limited simulation optimization space, small size of shielding cavity, etc., to save design time , easy to promote, the effect of accurate design method

Inactive Publication Date: 2016-08-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, when designing a diode matching circuit using this partial optimization design method based on the performance of the terahertz frequency band device unit circuit, due to the small size of the shielding cavity of the terahertz frequency band circuit, it is impossible to use irregular impedance matching structures such as branch matching. , its simulation optimization space is limited, therefore, it is necessary to study the optimal design method of device circuits suitable for the terahertz frequency band

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  • Optimum design method based on overall performance of terahertz frequency band device

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[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0029] The optimal design method of the present invention is used in the optimal design of the terahertz mixer circuit. In a specific implementation, the optimal design is realized by using ADS (Advanced Design system) and HFSS (High Frequency Structure Simulator) software. see figure 1 , which specifically includes the following steps:

[0030] Step S1: Design the device structure based on the device technical index requirements;

[0031] Step S2: Establish as figure 2 The circuit decomposition diagram of the terahertz mixer shown in the diagram shows 11 transmission line unit structures, including RF DC ground 1, RF (radio frequency) probe structure 2, RF height-reducing waveguide 3, diode 4, LO waveguide short-circuit surface 5, L...

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Abstract

The invention discloses an optimum design method based on overall performance of a terahertz frequency band device. The method comprises the steps of during optimum design, establishing stepped structure characterization impedance step transformation characteristics of a transmission line by extracting characteristic parameters of cell structures of the transmission line; after a proper terahertz diode is selected for use, establishing a diode circuit model at a needed working frequency band; establishing a complete whole device circuit model based on the designed device; carrying out optimization design of harmonic balance simulation by setting an objective function taking the overall device performance as an optimization target to obtain an optimal result; after that, combining according to structure parameters of the optimized cell structures of the transmission line, establishing a whole passive structure model of the related device, carrying out integral simulation of a passive circuit, and verifying a simulation result again to check whether the result still meets indexes or not; if not, returning to the previous step for adjusting until the result meets design requirements. The optimum design method is used for designing the terahertz frequency band device, and is accurate and efficient in design.

Description

Technical field [0001] The invention belongs to the field of terahertz circuit simulation design, and specifically includes an optimization design method suitable for the overall performance of terahertz frequency band devices. Background technique [0002] Terahertz waves include electromagnetic waves with frequencies from 0.1 to 10THz. Their long and short wavelength bands overlap with microwaves, millimeter waves and infrared light respectively. They have some advantages of microwaves, millimeter waves and light waves. They are used in broadband communications, precision guidance, object imaging, There are broad application prospects in fields such as environmental monitoring and medical diagnosis, and it is of great significance to master terahertz technology. Among them, terahertz frequency band devices, as key devices for realizing terahertz technology, are widely used in almost all terahertz application systems such as communications, radar, and detection, and are a k...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367G06F30/398
Inventor 张勇肖筑文徐锐敏延波赵伟任田昊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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