Hil-Yee Chan, Walter. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaves 84-87). / Abstracts in English and Chinese. / Chapter Chapter 1 --- introduction --- p.3 / Chapter Chapter 2 --- Background Theory --- p.6 / Chapter 2.1 --- Maximally Flat Filter Response --- p.6 / Chapter 2.2 --- Equal-Ripple Filter Response --- p.8 / Chapter 2.3 --- Low-pass to Band-pass Transformation --- p.9 / Chapter 2.4 --- Impedance and Admittance Inverter --- p.10 / Chapter 2.5 --- Coupled-Resonator Filter --- p.14 / Chapter Chapter 3 --- Active Filter Employing Negative Resistance --- p.18 / Chapter 3.1 --- Lossy Coupled-Resonator Filter --- p.18 / Chapter 3.2 --- Common-source Capacitive Feedback Configuration --- p.21 / Chapter 3.3 --- Active LC-resonator --- p.23 / Chapter 3.4 --- Design Criteria of the Active Filter --- p.24 / Chapter Chapter 4 --- Intermodulation Analysis --- p.27 / Chapter 4.1 --- IM Distortion of the Negative Resistance Circuit --- p.27 / Chapter 4.2 --- Analysis of the Active Coupled-Resonator Filter --- p.30 / Chapter 4.3 --- IM Distortion Power of a Nth Order Active Filter --- p.32 / Chapter Chapter 5 --- Noise Analysis --- p.37 / Chapter 5.1 --- Noise Basics and Noise Figure --- p.37 / Chapter 5.2 --- Noisy Two-Ports --- p.41 / Chapter 5.3 --- Correlation Matrix Representation of Noisy Two-Ports --- p.44 / Chapter 5.4 --- Change of Representation --- p.46 / Chapter 5.5 --- Interconnection of Noisy Two-Ports --- p.47 / Chapter 5.6 --- Correlation Matrix of the Basic Two-Ports --- p.48 / Chapter 5.7 --- Extraction of the Noise Parameters of MESFET --- p.51 / Chapter 5.8 --- Noise Parameters of CFY30 --- p.53 / Chapter 5.9 --- Noise Figure of CFY30 --- p.56 / Chapter Chapter 6 --- Noise Analysis of Passive and Active Filter --- p.60 / Chapter 6.1 --- Noise Current Generated by the Negative Resistance Circuit --- p.60 / Chapter 6.2 --- Noise Figure of the Passive Filter --- p.63 / Chapter 6.3 --- Noise Figure of the Active Filter --- p.65 / Chapter 6.3.1 --- Noise Figure of a Second-order Active Filter --- p.65 / Chapter 6.3.2 --- Noise Figure of the Higher-order Active Filter --- p.68 / Chapter 6.4 --- Design consideration of Active Filter with Optimized Noise and Linearity Performance --- p.71 / Chapter Chapter 7 --- Design of 900MHz Hybrid Active Filter --- p.73 / Chapter 7.1 --- Schematic of Active Filter --- p.73 / Chapter 7.2 --- Design Variants --- p.75 / Chapter 7.3 --- Measurement Results --- p.75 / Chapter 7.3.1 --- Passive Filter --- p.75 / Chapter 7.3.2 --- Active Filter --- p.78 / Chapter Chapter 8 --- Conclusion and Future Work --- p.83 / Reference --- p.84 / Author's Publications --- p.88

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1980. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE. / Includes bibliographical references. / by Alan Palevsky. / Ph.D.

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<p>The purpose of the project was to develop the hardware to a microwave wireless system working </p><p>at the frequency 2.45 GHz. The functionality of the system should also be easy to understand </p><p>since the system is to be used in an educational purpose. Much time has been spent impedance </p><p>matching components, a task that proved to be harder than we expected. Other work that has been </p><p>is layout of all parts, filter construction and the writing of an easy to understand thesis. After the </p><p>parts had been completed, they were tested in a network analyzer and/or spectrum analyzer. </p><p>Successful full system test has been done up to 400 meters, the length the system is to be used </p><p>for.</p>

Graduation date: 2005

Graduation date: 1999

This thesis discusses microstrip circuits and components with a slotted area on the ground plane. In recent years, various slot geometries have been placed on the ground plane with the purpose of reducing harmonics, producing frequency pass/stop-bands, and enhancing coupling effects. Among several ground slot geometries, a dumbbell shaped slot (DSS) is attractive because of its simple structure and easy analysis. The DSS and its applications to RF/microwave filters are studied and discussed. A lumped equivalent circuit model of the dumbbell shaped ground slot is introduced by utilizing resonator and filter theories. The accuracy of the equivalent circuit model is demonstrated through the comparison of circuit simulations and measurements. A lowpass filter (LPF) using slotted ground structure (SGS) with dumbbell shape is designed and measured to validate its theories. By using SGS techniques presented in this thesis, some other RF/microwave components such as a periodic structure, ultra-wideband bandpass filter (UWB-BPF), and rectenna with SGS-LPF are designed and tested.

The purpose of the project was to develop the hardware to a microwave wireless system working at the frequency 2.45 GHz. The functionality of the system should also be easy to understand since the system is to be used in an educational purpose. Much time has been spent impedance matching components, a task that proved to be harder than we expected. Other work that has been is layout of all parts, filter construction and the writing of an easy to understand thesis. After the parts had been completed, they were tested in a network analyzer and/or spectrum analyzer. Successful full system test has been done up to 400 meters, the length the system is to be used for.