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Eqivalent Circuit Modeling and Performance Optimization of Stripline RF Relay

Author: YanJuan
Tutor: LiangHuiMin；DiGuoFu
School: Harbin Institute of Technology
Course: Electrical Engineering and Automation
Keywords: Microstrip line RF relay Distribution parameters Orthogonal test Tolerance Design RF performance
CLC: TM58
Type: Master's thesis
Year: 2011
Downloads: 25
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Abstract

Telecommunications industry in recent years, the rapid development of the rising frequency of the analog and digital signals, the increasingly high demand for integrated microwave circuits, the market is more and more urgent demand for RF components with better RF performance and integration capabilities. As an integral part of an electronic components in the RF circuit, the RF relay control RF circuit turned on or off, the pros and cons of the RF performance of the entire RF signal transmission circuit capacity have a greater impact. Microstrip line RF relay has a good surface mount capability, low cost, has become the most widely used chip RF relays. Therefore, the theoretical study and performance optimization design of microstrip line RF relay important for enhancing the of our relay design and production level. In this paper, the classical transmission line theory, infinitesimal thinking and statistical methods of the RF relay signal transmission path in a typical continuous and discontinuous structure of the distribution parameters were extracted, the signal transmission path in the two states closed off, etc. The equivalent circuit model, through simulation analysis on the equivalent circuit model, each relay typical structure of insertion loss, VSWR, and isolation degree performance, initially identified performance influencing factors. Then, using the finite element simulation software modeling of RF relays the signal transmission path, consider the signal radiation calculated incentive terminal only produce TEM mode (TEM) and the relay terminals match 50Ω load, the relay RF performance relationship varies with frequency and electromagnetic field distribution; preliminary analysis of the dimensional changes of the relay RF performance influencing factors on the performance, and determine the appropriate variable value interval for performance optimization. Based on the above findings, the application of orthogonal experiment method to relay the signal path parameter design, consider the actual production and assembly need to determine the reasonable constraints and objective function, to develop orthogonal table simulation experiments, the range analysis and variance analysis, determine relay RF performance significantly influencing factors and the optimal level of value, the relay RF performance optimization design. Then examined the impact of the technological level of the relay performance. Tolerance Design best level combination of factors have been identified, to analyze the dimensional tolerances of the various factors on the rate of contribution to the objective function, the objective function tolerance design formulas, and re-allocation of the dimensional tolerances of the various factors in order to simplify the process requirements relay RF performance and reduce dispersion; addition to study the impact of industrial selection of conductor loss and dielectric loss, and to determine the corresponding relationship between the two kinds of losses and material properties. Finally, the test method for PCB relays research, design the relay test fixture and the calibration line relay RF performance of the the application network analyzer test, the test result with the equivalent circuit simulation and finite element The simulation results were compared to verify the validity of the model.

Eqivalent Circuit Modeling and Performance Optimization of Stripline RF Relay

Abstract

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