The Performance of Passive Lumped Element

Lumped Element;SRF;Quality Factor

Heo, Seung Kyun ; Dr. Michael B. Steer, Committee Chair,Dr. David Schurig, Committee Member,Dr. Paul D Franzon, Committee Member,Heo, Seung Kyun ; Dr. Michael B. Steer ; Committee Chair ; Dr. David Schurig ; Committee Member ; Dr. Paul D Franzon ; Committee Member

University:North Carolina State University

关键词: Lumped Element;    SRF;    Quality Factor;   

Others  :  https://repository.lib.ncsu.edu/bitstream/handle/1840.16/6340/etd.pdf?sequence=1&isAllowed=y

美国|英语

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【 摘 要 】

Lumped elements are the most widely used passive components in Radio Frequency(RF) circuits. The characteristics variation over change in frequency, however, limits theirapplication. This limitation stems from the physical dimensions of lumped elements, whichare, in general, 0603, 0402, and 0201 size in order to avoid the phase shift between the inputand the output. By examining the Quality Factor (Q) and Self-Resonant Frequency (SRF),the performance of lumped elements can be determined. The quality factor contains theenergy storing and dissipation terms, which vary according to frequency. This quality factorcan be obtained using the S-parameters of lumped elements.It is difficult to obtain accurate measurement of a non-coaxial package device such asa lumped inductor, because it cannot be measured using a calibrated measurement system. APrint Circuit Board (PCB) fixture is thus considered to connect a Device Under Test (DUT)to 50 ohm connectors, and the effects of the fixture are then removed by performing a userfixture standards calibration. The combination of a port extension and calibration using amanufacturer’s calibration kit is employed to collect one-port S-parameters. The best result isachieved using a SubMiniature version A (SMA) fixture that has a short line and goodimpedance matchingThis thesis presents an extraction method to derive the quality factor of lumpedelements, and the quality factor is obtained using one-port S-parameters.