This dissertation protects the microwave factors and circuits employing coplanar waveguide (CPW), that is one of the most important transmission line media commonly used in current wireless interactions. The research focuses on five different applications of CPW to be discussed in the following sections. Chapter 1 is a historical review of Coplanar waveguide CPW and its characteristics. Compared with microstrip line (MSL), Coplanar waveguide CPW has merits of easy access to the ground plane, simple shunt connection, wide impedance range, substrate thickness insensitivity, low dispersion and phase inversion capability. These merits have been fully utilized in the following applications of CPW components and circuits. Chapter 2 presents a basic structure etched on the centre line of CPW. It works as photonic bandgap (PBG) structure with the characteristics of low pass, slow wave and band stop and is named as compact CPW resonant cell (CCRC). Two other forms of CCRC, the finite ground CCRC and the defected ground CCRC, have been developed. All of them share the features of PBG structures. Parameters studies manifest ways to control the bandwidth of the stop-band, return loss of the passband etc. Direct applications of CCRC in passive and active circuits are presented respectively in the following two chapters. In Chapter3 is an edge coupling type bandpass filter incorporating CCRC…
Contents: Coplanar waveguide components and their applications in microwave circuits
Chapter 1 Introduction
1.1 The competition between Coplanar waveguide CPW and Microstrip line
1.1.1 CPW characteristics
1.1.2 Coplanar waveguide CPW’s family
1.1.3 CPW’s special characters
1.2 New exploration of CPW’s application
References
Chapter 2 Compact resonant cell on CPW
2.1 An original compact Coplanar waveguide CPW resonant cell
2.1.1 Introduction
2.1.2 Features of CCRC as PBG structure
2.1.3 Features of CCRC as lowpass filter
2.1.4 Experiment
2.2 Finite ground CCRC
2.3 Defected ground CCRC
2.4 Summary
References
Chapter 3 Bandpass filter using compact Coplanar waveguide CPW resonant cell
3.1 Bandpass filter using conventional CCRC
3.1.1 Introduction
3.1.2 Analysis of the transmission zero
3.1.3 Experiments
3.2 Asymmetric CCRC application
3.2.1 Introduction
3.2.2 Analysis of the transmission zero
3.2.3 Experiment
3.3 CPW feed CMRC bandpass filter
3.4 Ground CCRC bandpass filter
3.5 Summary
References
Chapter 4 A new power amplifier linearized by a compact CPW resonant cell
4.1 Introduction
4.2 Analysis
4.3 Simulation and Experiment
4.4 Summary
References
Chapter 5 A microstrip rat-race embedded with a CPW phase inverter
5.1 Introduction 82
5.2 Design of MSL-to-Coplanar waveguide CPW transition
5.3 Design of the 180° phase inverter
5.4 Simulation and Experiment of the whole circuit
5.5 Summary
References
Chapter 6 A novel switched-line 180° phase shifter with Coplanar waveguide CPW phase inverter…
Coplanar waveguide components and their applications in microwave circuits
Source: City University of Hong Kong