| Summary: | 博士 === 國立成功大學 === 微電子工程研究所碩博士班 === 95 === This dissertation divides into three parts: (a) Preparation of thin film microstrip line using low K dielectrics; (b) microwave measurements of the low K dielectric materials and (c) design of filter with metamaterial and with multi-band performance.
(a) Preparation of thin film microstrip line using low K dielectrics
In the first part of the dissertation, we propose a detailed fabricating process and characterization of thin film microstrip line (TFML) on low K polyimide. By incorporating a spin-on dielectric polyimide and sputtering of aluminum, the TFML is fabricated on low cost low resistivity silicon (LRS) substrate ( ), the TFML with a thickness of 20μm polyimide dielectric layer presents attenuation losses of 0.385 dB/mm at 25 GHz and 0.438 dB/mm at 50 GHz. Effective dielectric constants, loss tangent and average power handling capability (APHC) of TFML on polyimide are carefully investigated and discussed. Additionally, the microwave characteristics of the dc-biased TFML were studied. This characterization of the TFML can be extensively applied on the interconnection of radio frequency integrated circuit (RFIC).
(b) Microwave measurements of the Low K dielectric materials
In the second part of the dissertation, we present a novel finite ground microstrip line to develop and to measure the microwave properties of TFML. By using the high frequency on-wafer and transmission line measurement technique, the low K dielectric can be accurately determined in the microwave properties and APHC under the condition for without dc-bias and with dc-bias. Especially in the case with dc-bias that can effectively evaluate the possibility of RF SoC.
(c) Filter design with metamaterial and with multi-band performance
In the third part of the dissertation, we discuss the propagation characteristics of single complementary split-ring resonator (CSRR) in planar transmission media. We also applied the periodic CSRRs to suppress the harmonics of the conventional dual-mode ring bandpass filter (BPF) by using the propagation characteristics of the periodic CSRRs. Additionally, we present a dual-band filter using stepped impedance resonator (SIR). The BPF has good dual-passband performances at 2.4 / 5.2 GHz and high isolation between the two passbands. The dual-band BPF has a smaller area and lower insertion loss in comparison of previous works.
Finally, some suggestions are made in the future work on technology for system on chip (SoC).
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