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Proceedings ArticleDOI

Characteristic Mode Analysis of Concentric Circular Ring Antenna

01 Oct 2018-
TL;DR: The modal Analysis of concentric circular ring antenna is performed to break the rotational symmetry and degeneracy using suitable excitation.
Abstract: CM has an ability to characterize radiation and scattering properties of conducting bodies based on object geometry and material properties. The characteristic mode theory implementation for antennas is synergy of two techniques namely GP manipulation and characteristic modes implementation to obtain orthogonal radiation modes. The modal Analysis of concentric circular ring antenna is performed to break the rotational symmetry and degeneracy using suitable excitation.
Citations
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Journal ArticleDOI
TL;DR: In this article, a novel design of wideband slot antennas using theory of characteristic modes and theory of mode coupling is presented, which gives a large fractional bandwidth of >35% and high gain of >3dB.
Abstract: In this article, we have presented a novel design of wideband slot antennas using theory of characteristic modes and theory of mode coupling. First, the narrow slot antenna, etched in a finite ground, is investigated with combined characteristic modes. While most of resonant slot antennas show narrowband operation, the modification of modal properties using structural manipulations is studied in detail and this analysis helps in the design of low-profile wideband slot antennas. Characteristic mode analysis explains the physical insight of resonance and radiation mechanism of proposed wideband slot antennas. Bandwidth enhancement techniques of these slot antennas are presented and validated with measured results of wideband slot antennas. This approach gives a large fractional bandwidth of >35% and high gain of >3 dB.

7 citations

References
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Book
31 Oct 2000
TL;DR: Feeding Techniques and Modeling, Design and Analysis of Microstrip Antenna Arrays: Parallel and Series Feed Systems, and Theory and Design of Active Integrated Micro Strip Antenna Amplifiers.
Abstract: Microstrip Radiators: Various Microstrip Antenna Configurations. Feeding Techniques and Modeling. Applications. Radiation Field. Surface Waves and Photonic Band-Gap Structures. Analytical Models for Microstrip Antennas: Transmission Line Model. Cavity Model. Generalized Cavity Model. Multi-port Network Model (MNM). Radiation Fields. Aperture Admittance. Mutual Admittance. Model for Coaxial Probe in Microstrip Antennas. Comparison of Analytical Models. Full-Wave Analysis of Microstrip Antennas: Spectral Domain Full-Wave Analysis. Mixed-Potential Integral Equation Analysis. Finite-Difference Time Domain Analysis.Rectangular Microstrip Antenna: Models for Rectangular Patch Antenna. Design Considerations for Rectangular Patch Antennas. Tolerance Analysis of Rectangular Microstrip Antennas. Mechanical Tuning of Patch Antennas. Quarter-wave Rectangular Patch Antenna. Circular Disk and Ring Antennas: Analysis of a Circular Disk Microstrip Antenna. Design Considerations for Circular Disk Antennas. Semicircular Disk and Circular Sector Microstrip Antennas. Comparison Of Rectangular And Circular Disk Microstrip Antennas. Circular Ring or Annular Ring Microstrip Antenna. Circular Sector Microstrip Ring Antenna. Microstrip Ring Antennas of Non-Circular Shapes. Dipoles and Triangular Patch Antennas: Microstrip Dipole and Center-Fed Dipoles. Triangular Microstrip Patch Antenna. Design of an Equilateral Triangular Patch Antenna. Microstrip Slot Antennas: Microstrip-Fed Rectangular Slot Antennas. CPW-Fed Slot Antennas. Annular Slot Antennas. Tapered Slot Antennas (TSA). Comparison of Slot Antennas with Microstrip Antennas. Circularly Polarized Microstrip Antennas and Techniques: Various Types of Circularly Polarized Microstrip Antennas. Singly-Fed Circularly Polarized Microstrip Antennas. Dual-Orthagonal Feed Circularly Polarized Microstrip Antennas. Circularly Polarized Traveling-Wave Microstrip-Line Arrays. Bandwidth Enhancement Techniques. Sequentially Rotated Arrays. Broad-Banding of Microstrip Antennas: Effect of Substrate Parameters on Bandwidth. Selection of Suitable Patch Shape. Selection of Suitable Feeding Technique. Multi-Moding Techniques. Other Broadbanding Techniques. Multifrequency Operation. Loaded Microstrip Antennas and Applications: Polarization Diversity Using Microstrip Antennas. Frequency Agile Microstrip Antennas. Radiation Pattern Control of Microstrip Antennas. Loading Effect of a Short. Compact Patch Antennas. Planar Inverted F Antenna. Dual-Frequency Microstrip Antennas. Dual-Frequency Compact Microstrip Antennas. Active Integrated Microstrip Antennas: Classification of Active Integrated Microstrip Antennas. Theory and Design of Active Integrated Microstrip Antenna Oscillators. Theory and Design of Active Integrated Microstrip Antenna Amplifiers. Frequency Conversion Active Integrated Microstrip Antenna Theory and Design. Design and Analysis of Microstrip Antenna Arrays: Parallel and Series Feed Systems. Mutual Coupling. Design of Linear Arrays. Design of Planar Arrays. Monolithic Integrated Phased Arrays.

3,612 citations


"Characteristic Mode Analysis of Con..." refers background in this paper

  • ...The design equations of each rings are presented in [1], [7]....

    [...]

Journal ArticleDOI
TL;DR: In this paper, the authors summarize the work that has been developed by the authors for the last several years, in order to demonstrate that the Theory of Characteristic Modes can be used to perform a systematic design of different types of antennas.
Abstract: The objective of this paper is to summarize the work that has been developed by the authors for the last several years, in order to demonstrate that the Theory of Characteristic Modes can be used to perform a systematic design of different types of antennas. Characteristic modes are real current modes that can be computed numerically for conducting bodies of arbitrary shape. Since characteristic modes form a set of orthogonal functions, they can be used to expand the total current on the surface of the body. However, this paper shows that what makes characteristic modes really attractive for antenna design is the physical insight they bring into the radiating phenomena taking place in the antenna. The resonance frequency of modes, as well as their radiating behavior, can be determined from the information provided by the eigenvalues associated with the characteristic modes. Moreover, by studying the current distribution of modes, an optimum feeding arrangement can be found in order to obtain the desired radiating behavior.

565 citations


"Characteristic Mode Analysis of Con..." refers methods in this paper

  • ...Readers are advised to read fundamentals of CMA from the works of Marta Cabedo-Fabres et al [5] and Yikai chen et al [6]....

    [...]

BookDOI
22 Jun 2015
TL;DR: This book examines both theoretical developments of characteristic modes (CMs) and practical developments of CM-based methodologies for a variety of critical antenna designs with a focus on platform-integrated antenna systems using characteristic modes.
Abstract: This book examines both theoretical developments of characteristic modes (CMs) and practical developments of CM-based methodologies for a variety of critical antenna designs. The book is divided into six chapters. Chapter 1 provides an introduction and discusses the recent advances of the CM theory and its applications in antenna engineering. Chapter 2 describes the formulation of the characteristic mode theory for perfectly electrically conducting (PEC) bodies and discusses its numerical implementations. Chapter 3 presents the CM theory for PEC structures embedded in multilayered medium and its applications. Chapter 4 covers recent advances in CM theory for dielectric bodies and also their applications. Chapter 5 discusses the CM theory for N-port networks and its applications to the design of antenna arrays. Finally, Chapter 6 discusses the design of platform-integrated antenna systems using characteristic modes.

449 citations


"Characteristic Mode Analysis of Con..." refers methods in this paper

  • ...Readers are advised to read fundamentals of CMA from the works of Marta Cabedo-Fabres et al [5] and Yikai chen et al [6]....

    [...]

Journal ArticleDOI
TL;DR: In this article, a beam peak and null steering multiple radiating mode based microstrip patch antenna is presented for satellite receive applications operating at L1 Global Positioning System (GPS) band.
Abstract: A beam peak and null steering multiple radiating mode based microstrip patch antenna is presented for satellite receive applications operating at L1 Global Positioning System (GPS) band. Two collocated microstrip patch antennas were designed to produce TM 11 and TM 21 radiating modes. These orthogonal and circularly polarized radiation patterns were combined enabling full hemispherical steering of a single beam peak and null. Using theoretical analysis and full-wave simulation, the multimode aperture was designed to operate over a 25 MHz bandwidth centered at 1.575 GHz, which covers the L1 GPS band. Impedance and radiation pattern measurements of the passive antenna aperture were in close agreement with the simulated data. Next, this antenna was integrated with an active feed network allowing full hemispherical control over the beam null position and limited beam peak scan in ≈ 5 ° increments. Using a simple calibration scheme, the measured beam peak and null elevation angles were programmed to within <; 10° of the intended value based on simulation. Azimuthal positions were consistently offset by ≈ 20 ° from the simulated value, which could be resolved in the board layout by phase matching the transmission lines and test point locations. The antenna maintained high total efficiency >68% and low axial ratio 3 dB over all steering angles.

63 citations


"Characteristic Mode Analysis of Con..." refers background in this paper

  • ...Labadie et al [2] proposed GPS operating beam peak and null steering multiple radiating mode based microstrip patch antenna dedicated for satellite receive applications....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a simple theory is developed for the analysis of microstrip patch elements which are loaded at one or more points with lumped linear load impedances, based on a cavity model in which the shape of the field distribution between the patch and ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic-and electric-walled cavity.
Abstract: A simple theory is developed for the analysis of microstrip patch elements which are loaded at one or more points with lumped linear load impedances. The analysis is based on a cavity model in which the shape of the field distribution between the patch and ground plane is assumed to be well approximated by that of the resonant modes of a corresponding magnetic- and electric-walled cavity. The resonant mode of the loaded cavity is represented as an appropriate superposition of the modes of the corresponding unloaded cavity. The characteristic equation for the resonant frequencies of the loaded cavity is obtained in terms of the load impedances and the unloaded cavity multiport open-circuit parameters. An analysis of the input impedance of a rectangular microstrip element shorted at an arbitrary point has been implemented and the results show good agreement with experiment. An ancilliary result showing the equivalence between a thin strip and a circular cylinder model of a feed current distribution...

55 citations