Thesis (Ph.D.)--Tufts University, 1995. / Submitted to the Dept. of Electrical Engineering. Includes bibliographical references (leaves 237-253). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

Thesis (M.Sc.)--Chinese University of Hong Kong. / Bibliography: leaves 84-86.

This project focusses on the design of a high speed passive delay line for use in a Feed Forward Equalizer (FFE). The FFE is used to equalize a 20 Gbp/s throughput PAM-4 signal after transmission through a 20-inch FR4 backplane channel. Inductor electromagnetic simulations are used to design an inductor for use in the passive delay line and a lumped element inductor model is presented. Measurement results show performance of the delay line at 10 GSym/s.

The studies of the designs on true-time-delay lines (TTDLs), n-bit digital phase shifters and wideband switched-line phase shifters using composite right/left-handed transmission-line (CRLH TL) unit cells are presented in this thesis. To simplify these designs, a symmetrical CRLH TL unit cell having equal input and output impedance is proposed. In the design of TDDLs, the symmetrical CRLH TL unit cell with higher time-delay efficiency helps achieve a size reduction of 67.9%, compared with the TTDL designed using right-handed transmission line (RH TL). The symmetrical CRLH TL unit cell is further modified to a compact CRLH TL unit cell to further reduce the size by 58%. For performances comparison, the TTDLs using the compact CRLH TL unit cells, symmetrical CRLH TL unit cells and RH TL are studied using computer simulation and measurement. Results show that the TTDLs using the compact CRLH TL unit cells can achieve much longer time delays. The TTDLs designed using CRLH TL unit cells have narrow bandwidths because CRLH TL unit cells have narrow bandwidths. In this thesis, a wideband unit cell obtained by rotating the CRLH TL unit cell by 900is proposed in the design of TTDLs. Simulation and measurement show that the TTDL using wideband unit cells can achieve a time delay about 3 times and 6 times longer than that of the periodic microstrip line (PML) and RH TL, respectively. A 2-bit, 3-bit and 6-bit phase shifters using symmetrical CRLH TL unit cells are designed using computer simulation. In these designs, positive-intrinsic-negative (PIN) diodes mounted on the fingers of the CRLH TL unit cells are used as switches to control the phase response at the output. Different phase shifts are achieved using different switching states determined by controlling bits. The phase shifters are fabricated and measured. Simulated and measured results agree very well. Power-handling capability is also analyzed using surface-current density on the CRLH TL unit cells. Results show that the phase shifters have much higher power-handling capabilities than that of the PIN diodes. A wideband 1800-switched-line phase shifter using symmetrical CRLH TL unit cell is proposed. The switched-line phase shifter employs a symmetrical CRLH TL unit cell as the reference arm and a RH TL as the delay arm to produce a constant phase shift across a wide frequency band. For comparison, a traditional 1800-switched-line phase shifter using RH TLs for both reference and delay arms is also designed. To reduce the size, the CRLH TL unit cell is realized using lump elements (LEs). Wideband 900-and 1800-switched-line phase shifters using LE-CRLH TL unit cells are studied and compared with the traditional 900-and 1800-switched-line phase shifters. Simulated and measured results show that the proposed designs using symmetrical CRLH TL unit cells and LE-CRLH TL unit cells have very constant phase shifts with smaller variations compared with the traditional designs. / published_or_final_version / Electrical and Electronic Engineering / Doctoral / Doctor of Philosophy

No description available.

Thesis (Ph.D.) -- University of Adelaide, Dept. of Electrical and Electronic Engineering, 1997. / Bibliography: leaves 158-167.

Thesis (M.S.)--University of Wisconsin--Madison, 1966. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 86-88.

by Wing-Kit Chung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references (leaves 123-127). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Application of Time Delay and Doppler Shift Estimation in Active Radar --- p.1 / Chapter 1.2 --- Joint Time delay and Doppler Shift Estimation Algorithm based on Correlation --- p.4 / Chapter 1.3 --- A Brief Review of Radar Signal Design --- p.6 / Chapter 1.3.1 --- Suppression of Range Sidelobes Level --- p.6 / Chapter 1.3.2 --- Reduction of Ambiguity of Delay-Doppler Plane --- p.8 / Chapter 1.4 --- Goal and Outline of the Thesis --- p.9 / Chapter 2 --- CAF and Pulse Diversity for Radar Signals --- p.11 / Chapter 2.1 --- Radar Ambiguity Function --- p.12 / Chapter 2.1.1 --- Properties of Radar Ambiguity Function --- p.12 / Chapter 2.1.2 --- Ideal Ambiguity Function --- p.13 / Chapter 2.2 --- Composite Ambiguity Function (CAF) --- p.14 / Chapter 2.2.1 --- Properties of Composite Ambiguity Function --- p.15 / Chapter 2.3 --- CAF of Joint Phase and Frequency Shift Keying (PSK-FSK) Mod- ulated Signal --- p.17 / Chapter 2.4 --- Summary --- p.21 / Chapter 3 --- CAF Algorithm and Its Performance Analysis --- p.22 / Chapter 3.1 --- CAF Algorithm for Time Delay and Doppler Shift Estimation --- p.23 / Chapter 3.2 --- The Cramer-Rao Lower Bound of the CAF Algorithm --- p.24 / Chapter 3.3 --- Performance Analysis of the CAF Algorithm --- p.28 / Chapter 3.4 --- Global Accuracy --- p.31 / Chapter 3.5 --- Numerical Results for Derivation of CAF Algorithm --- p.35 / Chapter 3.5.1 --- Simulation Results of CRLB for Various Multi-pulse Signals --- p.35 / Chapter 3.5.2 --- Simulation Results of Global Accuracy for Various Multi- pulse Signals --- p.36 / Chapter 3.5.3 --- Simulation on Global Accuracy with Different Parameters --- p.37 / Chapter 3.6 --- Summary --- p.39 / Chapter 4 --- Optimum Pulse-Diverse Waveforms Design --- p.46 / Chapter 4.1 --- Criteria for Optimum Waveforms --- p.46 / Chapter 4.2 --- Optimum Signals Based on Joint Phase and Frequency Shift Key- ing (PSK-FSK) Modulated Signal --- p.48 / Chapter 4.3 --- Genetic Algorithm (GA) --- p.50 / Chapter 4.4 --- Numerical Results --- p.54 / Chapter 4.4.1 --- "Comparison of Optimized PSK, FSK and PSK-FSK Signals" --- p.55 / Chapter 4.4.2 --- Simulation on Large Number of Pulses for Pulse-diverse Waveform Set --- p.59 / Chapter 4.4.3 --- Simulation Results of CAF algorithm for Time Delay and Doppler Shift Estimation --- p.63 / Chapter 4.4.4 --- Various Distribution of Ambiguity Volume on the Delay- Doppler Plane --- p.70 / Chapter 4.5 --- Summary --- p.74 / Chapter 5 --- Wideband CAF (WCAF) and Its Analysis --- p.75 / Chapter 5.1 --- WCAF Algorithm for Time Delay and Doppler Stretch Estimation --- p.76 / Chapter 5.2 --- Theory of Wavelet Packets --- p.77 / Chapter 5.3 --- Design of Wideband Optimum Waveforms for WCAF Algorithm --- p.80 / Chapter 5.4 --- Performance Evaluation --- p.82 / Chapter 5.4.1 --- The Cramer-Rao Lower Bound of WCAF Algorithm --- p.83 / Chapter 5.4.2 --- The Global Accuracy of WCAF Algorithm --- p.84 / Chapter 5.4.3 --- Numerical Results --- p.86 / Chapter 5.5 --- Summary --- p.89 / Chapter 6 --- Conclusion and Suggestion for Future Research --- p.90 / Chapter 6.1 --- Conclusion --- p.90 / Chapter 6.2 --- Suggestion for Future Research --- p.93 / Chapter A --- Derivation of Ambiguity Function and CAF --- p.94 / Chapter A.1 --- Properties of Radar Ambiguity Function --- p.94 / Chapter A.2 --- Properties of Composite Ambiguity Function --- p.96 / Chapter B --- Derivation of Fisher Information Matrix of CAF Algorithm --- p.98 / Chapter C --- Derivation of Performance Analysis of CAF Algorithm --- p.103 / Chapter C.1 --- Derivation of TD and DS Estimate by Proposed Estimator --- p.103 / Chapter C.2 --- Derivation the Asymptotic Variance of The Estimates --- p.106 / Chapter D --- Derivation of Probability of Decision Error --- p.113 / Chapter E --- PSK-FSK Modulating Code of Various Multi-pulse Signals --- p.116 / Chapter F --- Derivation of Wavelet-Based Wideband CAF --- p.120 / Chapter F.1 --- Volume of Wideband Ambiguity Function --- p.120 / Chapter F.2 --- Volume of Wideband Composite Ambiguity Function --- p.121 / Bibliography --- p.123

by Wai-Shan Chan. / Thesis submitted in: August 1997. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1998. / Includes bibliographical references (leaves 61-63). / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Motivation --- p.1 / Chapter 1.2 --- Fiber recirculating delay loop --- p.2 / Chapter 1.3 --- Slicing scheme --- p.3 / Chapter 1.4 --- Outline of the thesis --- p.4 / Chapter Chapter 2 --- Fiber recirculating delay loop / Chapter 2.1 --- Review --- p.5 / Chapter 2.1.1 --- Introduction --- p.5 / Chapter 2.1.2 --- The device --- p.6 / Chapter 2.1.3 --- Filtering properties of the fiber recirculating delay loop --- p.8 / Chapter 2.1.4 --- Noise properties of the fiber recirculating delay loop --- p.10 / Chapter 2.1.5 --- Limitations of the BRL device --- p.13 / Chapter 2.2 --- Discussion --- p.14 / Chapter 2.3 --- Summary --- p.14 / Chapter Chapter 3 --- Slicing scheme / Chapter 3.1 --- Introduction --- p.16 / Chapter 3.2 --- Slicing Scheme --- p.18 / Chapter 3.3 --- Experimental Investigation --- p.20 / Chapter 3.4 --- Numerical analysis --- p.33 / Chapter 3.5 --- Simulations --- p.40 / Chapter 3.6 --- Discussion --- p.49 / Chapter 3.6.1 --- The relationship between the system penalty and the ratio fd/fs --- p.49 / Chapter 3.6.2 --- Design of BRL --- p.51 / Chapter 3.6.3 --- Advantages and Disadvantages of the slicing scheme --- p.56 / Chapter 3.7 --- Summary --- p.56 / Chapter Chapter 4 --- Conclusion / Chapter 4.1 --- Fiber recirculating delay loop as a BRL device --- p.58 / Chapter 4.2 --- Slicing scheme --- p.59 / Chapter 4.3 --- Future work --- p.60 / Bibliography --- p.61

Thesis--M. Phil., University of Hong Kong, 1981.