Compact Two-position Phase Shifter

The paper proposes and investigates the topology of a phase shifter based on a directional coupler. The dimensions of such a device are reduced by using artificial transmission lines instead of quarter-wave sections. By connecting several pairs of phase-shifting cells instead of the usual one, it was possible to obtain a phase shifter design with two phase shifts (instead of one) © 2022. Telfor Journal.All Rights Reserved

A Review on the Structure, Application and Performance of the Passive Microstrip Devices

Microstrip technology is widely applied for design and implementation of several communication devices such as filters, diplexers, triplexers, multiplexers, couplers, etc. They are utilized to isolate desired signals and remove disturbing signals. The layout of filters, diplexers and triplexers have two, three and four ports, respectively. Passive filters have at least one pass channel, whereas diplexers have at least two channels to transmit the desired signal, and multiplexers have more passbands with more channels. In order to implement the passive components, first a cell called resonator must be designed. Creativity is very important in resonator design. It must be small and novel to get a better device than previous works. Therefore, the layout of previous reported resonator, used in passive microstrip devices, are studied in this work. There is a fierce competition among designers to miniaturize and increase the device performance. Hence we will investigate them, from the point of view size and performance, in this work. Some diplexers are multi-channel, which are more difficult to design than two-channel diplexers. Therefore, the multi-channel diplexers are less reported than the two-channel diplexers. The design of multiplexers is also very difficult because several channels must be controlled. Hence, they are less designed than filters and diplexers. The diplexers can be bandpass-bandpass or lowpass-bandpass, where the latest is less designed. This is because designing a lowpass-bandpass diplexer needs lowpass and bandpass resonators, whereas the design of a bandpass-bandpass diplexer needs only a bandpass resonator

Compact Metamaterials Induced Circuits and Functional Devices

In recent years, we have witnessed a rapid expansion of using metamaterials to manipulate light or electromagnetic (EM) wave in a subwavelength scale. Specially, metamaterials have a strict limitation on element dimension from effective medium theory with respect to photonic crystals and other planar structures such as frequency selective surface (FSS). In this chapter, we review our effort in exploring physics and working mechanisms for element miniaturization along with the resulting effects on element EM response. Based on these results, we afford some guidelines on how to design and employ these compact meta-atoms in engineering functional devices with high performances. We found that some specific types of planar fractal or meandered structures are particularly suitable to achieve element miniaturization. In what follows, we review our effort in Section 1 to explore novel theory and hybrid method in designing broadband and dual band planar devices. By using single or double such compact composite right-/left-handed (CRLH) atom, we show that many microwave/RF circuits, i.e., balun, rat-race coupler, power divider and diplexer, can be further reduced while without inducing much transmission loss from two perspectives of lumped and distributed CRLH TLs. In Section 2, we show that a more compact LH atom can be engineered by combining a fractal ring and a meandered thin line. Numerical and experimental results demonstrate that a subwavelength focusing is achieved in terms of smooth outgoing field and higher imaging resolution. Section 3 is devoted to a clocking device from the new concept of superscatterer illusions. To realize the required material parameters, we propose a new mechanism by combining both electric and magnetic particles in a composite meta-atom. Such deep subwavelength particles enable exact manipulation of material parameters and thus facilitate desirable illusion performances of a proof-of-concept sample constructed by 6408 gradually varying meta-atoms. Finally, we summarize our results in the last section

Nouvelles Topologies des diviseurs de puissance, balun et déphaseurs en bandes RF et millimétiques, apport des lignes à ondes lentes

L objectif de cette thèse a été premièrement de réaliser des dispositifs passifs intégrés à base de lignes à onde lentes nommées S-CPW (pour Slow-wave CoPlanar Waveguide ) aux fréquences millimétriques. Plusieurs technologies CMOS ou BiCMOS ont été utilisées: CMOS 65 nm et 28 nm ainsi que BiCMOS 55 nm. Deux baluns, le premier basé sur une topologie de rat-race et le second basé sur un diviseur de puissance de Wilkinson modifié, ainsi qu un inverseur de phase, ont été réalisés et mesurés dans la technologie CMOS 65 nm. Les résultats expérimentaux obtenus se situent à l état de l art en termes de performances électriques. Un coupler hybride et un diviseur de puissance avec des sorties en phase sans isolation ont été conçus en technologie CMOS 28 nm. Les simulations montrent de très bonnes performances pour des dispositifs compacts. Les circuits sont en cours de fabrication et pourront très bientôt être caractérisés. Ensuite, une nouvelle topologie de diviseurs de puissance, avec sorties en phase et isolé a été développée, offrant une grande flexibilité et compacité en comparaison des diviseurs de puissance traditionnels. Cette topologie est parfaitement adaptée pour les technologies silicium. Comme preuve de concept, deux diviseurs de puissance avec des caractéristiques différentes ont été réalisés en technologie PCB microruban à la fréquence de 2.45 GHz. Un composent a été conçu à 60 GHz en technologie BiCMOS 55 nm utilisant des lignes S CPW. Les simulations prouvent que le dispositif est faibles pertes, adapté et isolé. Les circuits sont également en cours de fabrication. Enfin, deux topologies de reflection type phase shifter ont été développées, la première dans la bande RF et la seconde aux fréquences millimétrique. Pour la bande RF, le déphasage atteint plus de 360 avec une figure de mérite très élevée en comparaison avec l état de l art. En ce qui concerne le déphaseur dans la bande millimétrique, la simulation montre un déphasage de 341 avec également une figure de mérite élevée.The first purpose of this work was the use of slow-wave coplanar waveguides (S CPW) to achieve various passive components with the aim to show their great potential and interest at millimetre-waves. Several CMOS or BiCMOS technologies were used: CMOS 65 nm and 28 nm, and BiCMOS 55 nm. Two baluns, one based on a rat-race topology and the other based on a modified Wilkinson power divider, and a phase inverter, were achieved and measured in a 65 nm CMOS technology. State-of-the-art results were achieved. A branch-line coupler and an in phase power divider without isolation were designed in a 28 nm CMOS technology. Really good performances are expected for these compact devices being yet under fabrication. Then, a new topology of in phase and isolated power divider was developed, leading to more flexibility and compactness, well suited to millimetre-wave frequencies. Two power dividers with different characteristics were realized in a PCB technology at 2.45 GHz by using microstrip lines, as a proof-of-concept. After that, a power divider was designed at the working frequency of 60 GHz in the 55 nm BiCMOS technology with S CPWs. The simulation results showed a low loss, full-matched and isolated component, which is also under fabrication and will be characterized as soon as possible. Finally, two new topologies of reflection type phase shifters were presented, one for the RF band and one for the millimetre-wave one. For the one in RF band, the phase shift can reach more than 360 with a great figure-of-merit as compared to the state-of-the-art. Concerning the phase shifter in the millimetre-wave band, the simulation results show a phase shift of 341 with also a high figure-of-merit.SAVOIE-SCD - Bib.électronique (730659901) / SudocGRENOBLE1/INP-Bib.électronique (384210012) / SudocGRENOBLE2/3-Bib.électronique (384219901) / SudocSudocFranceF

Advanced design of microwave power divider with enhanced harmonic suppression.

Ip, Wei Chi.Thesis (M.Phil.)--Chinese University of Hong Kong, 2011.Includes bibliographical references (leaves 92-94).Abstracts in English and Chinese.Abstract --- p.i摘要 --- p.iiAcknowledgement --- p.iiiTable of Content --- p.ivLists of Figures --- p.viiLists of Tables --- p.xiiChapter Chapter 1: --- Introduction --- p.1Chapter 1.1 --- Research Motivation and Obj ective --- p.1Chapter 1.2 --- Original Contribution --- p.2Chapter 1.3 --- Overview of the Thesis Organization --- p.3Chapter 1.4 --- "Research Approach, Assumptions and Limitations" --- p.4Chapter Chapter 2: --- Power Divider Design Fundamentals --- p.5Chapter 2.1 --- Power Divider Basics --- p.5Chapter 2.2 --- Wilkinson Power Divider --- p.6Chapter 2.3 --- Power Divider with Unequal Power Division --- p.8Chapter 2.4 --- Multi-way Power Divider --- p.9Chapter 2.4.1 --- Wilkinson N-way Hybrid --- p.10Chapter 2.4.2 --- Radial Hybrid --- p.11Chapter 2.4.3 --- Fork Hybrid --- p.12Chapter 2.4.4 --- Multi-layer Approach --- p.ISChapter 2.4.5 --- Power Recombination Concept --- p.15Chapter 2.4.6 --- Multi-coupled-line Approach --- p.18Chapter Chapter 3: --- Conventional Power Divider Designs with Harmonic Suppression --- p.20Chapter 3.1 --- Resonating-stubs Topology --- p.20Chapter 3.2 --- Asymmetric Defected Ground Structure (DGS) --- p.26Chapter 3.3 --- Anti-Coupled Line Structure --- p.30Chapter 3.4 --- Microstrip Electromagnetic Bandgap (EBG) Based Topology --- p.32Chapter 3.5 --- Embedded Resonators Topology --- p.37Chapter 3.6 --- Extended Line Approach --- p.39Chapter Chapter 4: --- New 2-way Power Divider Design with Spurious Suppression and Impedance Transformation --- p.41Chapter 4.1 --- Proposed Topology --- p.41Chapter 4.2 --- Design and Analysis --- p.42Chapter 4.3 --- Simulation Study --- p.45Chapter 4.4 --- Experimental Verification --- p.50Chapter 4.5 --- Summary --- p.57Chapter Chapter 5: --- New 2-way Power Divider Design with Extended Spurious Suppression --- p.58Chapter 5.1 --- Proposed Topology --- p.58Chapter 5.2 --- Design and Analysis --- p.59Chapter 5.3 --- Simulation Study --- p.64Chapter 5.3 --- Experimental Verification --- p.68Chapter 5.4 --- Summary --- p.71Chapter Chapter 6: --- New 2-way Unequal Power Divider Design with Dual-harmonic Rejection --- p.72Chapter 6.1 --- Proposed Topology --- p.72Chapter 6.2 --- Design and Analysis --- p.73Chapter 6.3 --- Simulation Study --- p.76Chapter 6.4 --- Experimental Verification --- p.77Chapter 6.4 --- Summary --- p.80Chapter Chapter 7: --- New 3-way Power Divider Design with Multi-harmonic Rejection..… --- p.81Chapter 7.1 --- Proposed Topology --- p.81Chapter 7.2 --- Design and Analysis --- p.82Chapter 7.3 --- Simulation Study --- p.85Chapter 7.4 --- Experimental Verification --- p.87Chapter 7.4 --- Summary --- p.90Chapter Chapter 8: --- Conclusion --- p.91References --- p.92Author's Publications and Awards --- p.95Chapter Appendix 1: --- ABCD Parameters of Some Useful Two-port Circuits --- p.96Chapter Appendix 2: --- More Designs of Proposed Configuration in Chapter 5 --- p.97Chapter A2.1 --- Miniaturized version of Example 1 --- p.97Chapter A2.2 --- Design with improved stop-band response --- p.101Chapter A2.3 --- Design of prototype with 2 GHz operating frequency --- p.104Chapter Appendix 3: --- Brief Summary of Power Dividers with Harmonic Suppression --- p.10

Impedance Transformers

Non

Design and analysis of wideband passive microwave devices using planar structures

A selected volume of work consisting of 84 published journal papers is presented to demonstrate the contributions made by the author in the last seven years of his work at the University of Queensland in the area of Microwave Engineering. The over-arching theme in the author’s works included in this volume is the engineering of novel passive microwave devices that are key components in the building of any microwave system. The author’s contribution covers innovative designs, design methods and analyses for the following key devices and associated systems: Wideband antennas and associated systems Band-notched and multiband antennas Directional couplers and associated systems Power dividers and associated systems Microwave filters Phase shifters Much of the motivation for the work arose from the desire to contribute to the engineering o

Millimeter-Wave MMICs and Applications

As device technology improves, interest in the millimeter-wave band grows. Wireless communication systems migrate to higher frequencies, millimeter-wave radars and passive sensors find new solid-state implementations that promise improved performance, and entirely new applications in the millimeter-wave band become feasible. The circuit or system designer is faced with a new and unique set of challenges and constraints to deal with in order to use this portion of the spectrum successfully. In particular, the advantages of monolithic integration become increasingly important. This thesis presents many new developments in Monolithic Millimeter-Wave Integrated Circuits (MMICs), both the chips themselves and systems that use them. It begins with an overview of the various applications of millimeter waves, including a discussion of specific projects that the author is involved in and why many of them demand a MMIC implementation. In the subsequent chapters, new MMIC chips are described in detail, as is the role they play in real-world projects. Multi-chip modules are also presented with specific attention given to the practical details of MMIC packaging and multi-chip integration. The thesis concludes with a summary of the works presented thus far and their overall impact on the field of millimeter-wave engineering.</p

Amplifier linearization by using the generalized baseband signal injection method.

Leung Chi-Shuen.Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.Includes bibliographical references (leaves 82-89).Abstracts in English and Chinese.Chapter Chapter 1 --- Introduction --- p.1Chapter Chapter 2 --- Review of Linearization Techniques --- p.4Chapter 2.1 --- Feedforward --- p.5Chapter 2.2 --- Feedback --- p.7Chapter 2.3 --- Predistortion --- p.10Chapter Chapter 3 --- The Volterra Series Method for Nonlinear Analysis --- p.12Chapter 3.1 --- Volterra Series Method --- p.13Chapter 3.2 --- Nonlinear Transfer Function --- p.14Chapter 3.3 --- Weakly Nonlinear Approximation --- p.18Chapter 3.4 --- Nonlinear Modeling --- p.19Chapter 3.5 --- Determination of Nonlinear Transfer Function --- p.22Chapter Chapter 4 --- Manifestation of Nonlinear Behavior --- p.25Chapter 4.1 --- Two-Tone Volterra Series Analysis --- p.25Chapter 4.2 --- Harmonic Distortion --- p.28Chapter 4.3 --- AM/AM and AM/PM --- p.29Chapter 4.4 --- Intermodulation Distortion --- p.31Chapter Chapter 5 --- The Generalized Baseband Signal Injection Method --- p.33Chapter 5.1 --- Generalized Baseband Signal Injection Method (GM) --- p.34Chapter 5.2 --- Application of GM to Predistorter-Amplifier Linearization --- p.38Chapter 5.2.1 --- Case 1: Standalone Amplifier without Injection --- p.40Chapter 5.2.2 --- Case 2: Injection to Amplifier Only --- p.41Chapter 5.2.3 --- Case 3: Injection to Diode Predistorter Only --- p.41Chapter 5.2.4 --- Case 4: Injection to Both Diode Predistorter and Amplifier --- p.42Chapter 5.3 --- Application of GM to Multi-Stage Amplifier Linearization --- p.43Chapter 5.3.1 --- Case 1: Amplifying System with No Signal Injection --- p.46Chapter 5.3.2 --- Case 2: Amplifying System with Single Injection Point --- p.47Chapter 5.3.3 --- Case 3: Amplifying System with Two Injection Points --- p.48Chapter Chapter 6 --- Experimental Setup and Measurements --- p.50Chapter 6.1 --- Experimental Setup --- p.51Chapter 6.1.1 --- Diode Predistorter --- p.51Chapter 6.1.2 --- Small Signal Amplifier --- p.54Chapter 6.1.3 --- Medium Power Amplifier --- p.58Chapter 6.1.4 --- Baseband Signal Generation Circuit --- p.61Chapter 6.1.5 --- Baseband Amplifiers --- p.63Chapter 6.2 --- Linearization of Amplifier with Predistortion Circuitry --- p.65Chapter 6.2.1 --- Two-Tone Test --- p.65Chapter 6.2.2 --- Vector Signal Test --- p.68Chapter 6.2.3 --- Dynamic Range Evaluation --- p.70Chapter 6.3 --- Linearization of Multi-Stage Amplifying System --- p.71Chapter 6.3.1 --- Determination of Transfer and Gain Coefficients --- p.71Chapter 6.3.2 --- Two-Tone Test --- p.74Chapter 6.3.3 --- Vector Signal Test --- p.77Chapter 6.3.4 --- Dynamic Range Evaluation --- p.79Chapter Chapter 7 --- Conclusion and Future Work --- p.80References --- p.82Author's Publications --- p.9