Mixed-mode TRL algorithm based on symmetrical reflection standard

作者：Wan Liang^*; Wu Jianhua; Miao Jungang; He Guoyu

来源：Journal of Beijing University of Aeronautics and Astronautics, 2009, 35(1): 1-4.

• Calibration algorithms
• Calibration standards
• Common mode
• Device Under Tests
• Differential devices
• Differential mode
• Full-wave electromagnetic simulations
• Full-wave simulations
• Generalized reciprocity
• Mixed modes
• Mode conversions
• Phase relationships
• Scattering matrixes
• Simulation datum
• Single modes
• Transfer matrices
• Transition structures
• Unsymmetrical

A mixed-mode through-reflect-line (TRL) calibration algorithm based on symmetrical reflection standard was proposed to accurately characterize coupled differential devices using scattering parameters. Using the transition structure';s generalized reciprocity and the phase relationship between its scattering matrix entries, the sign ambiguity was removed and the transition structure';s mixed mode wave transfer matrix was obtained. The calibration standards of the proposed algorithm are similar to the requirement of traditional single-mode TRL algorithm, and unsymmetrical structured reflection standard is not necessary to yield mode conversion. To verify the proposed algorithm, the single-mode scattering matrix of calibration standards and device-under-test (DUT), both of which are embedded with the transition structures, were calculated from full-wave electromagnetic simulation, and the proposed algorithm was used to process the simulation data to calculate the DUT';s mixed-mode scattering matrix. The calibration results were compared with that from full-wave simulation, and the agreement of the data obtained through both approaches indicates that the proposed algorithm is valid to calibrate linear differential devices.

• 出版日期2009
• 单位北京大学