scispace - formally typeset
Search or ask a question
Book

Broadband Planar Antennas: Design and Applications

TL;DR: In this article, the authors present an overview of the most important features of a planar antenna and its application in computer applications. But, they do not discuss how to improve the performance of these antennas.
Abstract: Foreword. Preface. Acknowledgements. 1 Planar Radiators. 1.1 Introduction. 1.2 Bandwidth Definitions. 1.2.1 Impedance Bandwidth. 1.2.2 Pattern Bandwidth. 1.2.3 Polarization or Axial-ratio Bandwidth. 1.2.4 Summary. 1.3 Planar Antennas. 1.3.1 Suspended Plate Antennas. 1.3.2 Bent Plate Antennas. 1.4 Overview of this Book. References. 2 Broadband Microstrip Patch Antennas. 2.1 Introduction. 2.2 Important Features of Microstrip Patch Antennas. 2.2.1 Patch Shapes. 2.2.2 Substrates. 2.2.3 Feeding Structures. 2.2.4 Example: Rectangular Microstrip Patch Antennas. 2.3 Broadband Techniques. 2.3.1 Lowering the Q. 2.3.2 Using an Impedance Matching Network. 2.3.3 Case Study: Microstrip Patch Antenna with Impedance Matching Stub. 2.3.4 Introducing Multiple Resonances. 2.3.5 Case Study: Microstrip Patch Antenna with Stacked Elements. References. 3 Broadband Suspended Plate Antennas. 3.1 Introduction. 3.2 Techniques to Broaden Impedance Bandwidth. 3.2.1 Capacitive Load. 3.2.2 Slotted Plates. 3.2.3 Case Study: SPA with an -shaped Slot. 3.2.4 Electromagnetic Coupling. 3.2.5 Nonplanar Plates. 3.2.6 Vertical Feed Sheet. 3.3 Techniques to Enhance Radiation Performance. 3.3.1 Radiation Characteristics of SPAs. 3.3.2 SPA with Dual Feed Probes. 3.3.3 Case Study: Center-concaved SPA with Dual Feed Probes. 3.3.4 SPA with Half-wavelength Probe-fed Strip. 3.3.5 SPA with Probe-fed Center Slot. 3.3.6 Case Study: Center-fed SPA with Double L-shaped Probes. 3.3.7 SPA with Slots and Shorting Strips. 3.4 Arrays with Suspended Plate Elements. 3.4.1 Mutual Coupling between Two Suspended Plate Elements. 3.4.2 Reduced-size Array above Double-tiered Ground Plane. References. 4 Planar Inverted-L/F Antennas. 4.1 Introduction. 4.2 The Inverted-L/F Antenna. 4.3 Broadband Planar Inverted-F/L Antenna. 4.3.1 Planar Inverted-F Antenna. 4.3.2 Planar Inverted-L Antenna. 4.4 Case Studies. 4.4.1 Handset Antennas. 4.4.2 Laptop Computer Antennas. References. 5 Planar Monopole Antennas and Ultra-wideband Applications. 5.1 Introduction. 5.2 Planar Monopole Antenna. 5.2.1 Planar Bi-conical Structure. 5.2.2 Planar Monopoles. 5.2.3 Roll Monopoles. 5.2.4 EMC Feeding Methods. 5.3 Planar Antennas for UWB Applications. 5.3.1 Ultra-wideband Technology. 5.3.2 Considerations for UWB Antennas and Source Pulses. 5.3.3 Planar UWB Antenna and Assessment. 5.4 Case Studies. 5.4.1 Planar UWB Antenna Printed on a PCB. 5.4.2 Planar UWB Antenna Embedded into a Laptop Computer. 5.4.3 Planar Directional UWB Antenna. References. Index
Citations
More filters
Journal ArticleDOI
27 Feb 2009
TL;DR: In this article, the authors present an overview of the basic structure of UWB signals and their positioning applications, followed by a discussion of various position estimation techniques with an emphasis on time-based approaches, which are particularly suitable for UWB positioning systems.
Abstract: The high time resolution of ultra-wide-band (UWB) signals facilitates very precise position estimation in many scenarios, which makes a variety applications possible. This paper reviews the problem of position estimation in UWB systems, beginning with an overview of the basic structure of UWB signals and their positioning applications. This overview is followed by a discussion of various position estimation techniques, with an emphasis on time-based approaches, which are particularly suitable for UWB positioning systems. Practical issues arising in UWB signal design and hardware implementation are also discussed.

289 citations

Journal ArticleDOI
TL;DR: In this article, the design equations for lower band-edge frequency for all the regular shapes of printed monopole antennas with various feed positions were presented, where the length of the feed transmission line is a critical design parameter.
Abstract: This paper presents the design equations for lower band-edge frequency for all the regular shapes of printed monopole antennas with various feed positions. The length of the feed transmission line is a critical design parameter of these monopole antennas. Design curves for the length of the feed transmission line for various lower band-edge frequencies for all these regular shaped monopoles have been generated. A systematic study has been presented to explain the ultra-wide bandwidth obtained from these antennas with an example of elliptical monopole antenna.

282 citations

Book
03 Sep 2010
TL;DR: In this paper, the Cavity Model Characteristics of the Rectangular Patch and the Circular Patch are described and a full wave analysis of Microstrip antennas is performed using the full-wave analysis of microstrip antennas.
Abstract: Introduction Review of Some Background Materials General Formulation of the Cavity Model Characteristics of the Rectangular Patch Characteristics of the Circular Patch The Annular-Ring and the Equilaterial Triangular Patch Introduction to Full Wave Analysis of Microstrip Antennas Some Methods of Tuning the Resonant Frequencies of Patch Antennas Broadbanding Techniques Size Reduction Techniques Dual and Multi-Band Designs Dual Polarized Patch Antenna Designs Circular Polarization Microstrip Arrays

278 citations

Posted Content
TL;DR: The problem of position estimation in UWB systems is reviewed, beginning with an overview of the basic structure of UWB signals and their positioning applications, followed by a discussion of various position estimation techniques, with an emphasis on time-based approaches, which are particularly suitable for UWB positioning systems.
Abstract: The high time resolution of ultra-wideband (UWB) signals facilitates very precise position estimation in many scenarios, which makes a variety applications possible. This paper reviews the problem of position estimation in UWB systems, beginning with an overview of the basic structure of UWB signals and their positioning applications. This overview is followed by a discussion of various position estimation techniques, with an emphasis on time-based approaches, which are particularly suitable for UWB positioning systems. Practical issues arising in UWB signal design and hardware implementation are also discussed.

267 citations


Cites methods from "Broadband Planar Antennas: Design a..."

  • ...Among those techniques are using specific antenna geometries such as helix, biconical, and bowtie structures [102], beveling or smoothing [103]–[106], resistive loading [107], slotting (or adding a strip) [108], [109], notching, and optimizing...

    [...]

Book
01 May 2007
TL;DR: In this article, Chen et al. present an approach for the design and evaluation of an Inverted-F Antenna with Coupled Floating Elements (INF) for low-bandwidth applications.
Abstract: Foreword. Acknowledgements. List of Contributors. 1 Introduction (Zhi Ning Chen). References. 2 Handset Antennas (Brian S. Collins). 2.1 Introduction. 2.2 Performance Requirements. 2.3 Electrically Small Antennas. 2.4 Classes of Handset Antennas. 2.5 The Quest for Efficiency and Extended Bandwidth. 2.5.1 Handset Geometries. 2.5.2 Antenna Position in the Handset. 2.5.3 The Effect of the User. 2.5.4 Antenna Volume. 2.5.5 Impedance Behavior of a Typical Antenna in the Low Band. 2.5.6 Fields and Currents on Handsets. 2.5.7 Managing the Length-Bandwidth Relationship. 2.5.8 The Effect on RF Efficiency of Other Components of the Handset. 2.5.9 Specific Absorption Rate. 2.5.10 Hearing Aid Compliance. 2.5.11 Economic Considerations. 2.6 Practical Design. 2.6.1 Simulations. 2.6.2 Materials and Construction. 2.6.3 Recycling. 2.6.4 Building the Prototype. 2.6.5 Measurement. 2.6.6 Design Optimization. 2.7 Starting Points for Design and Optimization. 2.7.1 External Antennas. 2.7.2 Balanced Antennas. 2.7.3 Antennas for Other Services. 2.7.4 Dual-Antenna Interference Cancellation. 2.7.5 Multiple Input, Multiple Output. 2.7.6 Antennas for Lower-Frequency Bands - TV and Radio Services. 2.8 The RF Performance of Typical Handsets. 2.9 Conclusion. References. 3 RFID Tag Antennas (Xianming Qing and Zhi Ning Chen). 3.1 Introduction. 3.2 RFID Fundamentals. 3.2.1 RFID System Configuration. 3.2.2 Classification of RFID Systems. 3.2.3 Principles of Operation. 3.2.4 Frequencies, Regulations and Standardization. 3.3 Design Considerations for RFID Tag Antennas. 3.3.1 Near-field RFID Tag Antennas. 3.3.2 Far-field RFID Tag Antennas. 3.4 Effect of Environment on RFID Tag Antennas. 3.4.1 Near-field Tags. 3.4.2 Far-field Tags. 3.4.3 Case Study. 3.5 Summary. References. 4 Laptop Antenna Design and Evaluation (Duixian Liu and Brian Gaucher). 4.1 Introduction. 4.2 Laptop-Related Antenna Issues. 4.2.1 Typical Laptop Display Construction. 4.2.2 Possible Antennas for Laptop Applications. 4.2.3 Mechanical and Industrial Design Restrictions. 4.2.4 LCD Surface Treatment in Simulations. 4.2.5 Antenna Orientation in Display. 4.2.6 The Difference between Laptop and Cellphone Antennas. 4.2.7 Antenna Location Evaluations. 4.3 Antenna Design Methodology. 4.3.1 Modeling. 4.3.2 Cut-and-Try. 4.3.3 Measurements. 4.4 PC Card Antenna Performance and Evaluation. 4.5 Link Budget Model. 4.6 An INF Antenna Implementation. 4.7 Integrated and PC Card Solutions Comparison. 4.8 Dualband Examples. 4.8.1 An Inverted-F Antenna with Coupled Elements. 4.8.2 A Dualband PCB Antenna with Coupled Floating Elements. 4.8.3 A Loop Related Dualband Antenna. 4.9 Remarks on WLAN Antenna Design and Evaluations. 4.10 Antennas for Wireless Wide Area Network Applications. 4.10.1 INF Antenna Height Effects on Bandwidth. 4.10.2 A WWAN Dualband Example. 4.11 Ultra-Wide Band Antennas. 4.11.1 Description of the UWB Antenna. 4.11.2 UWB Antenna Measurement Results. References. 5 Antenna Issues in Microwave Thermal Therapies (Koichi Ito and Kazuyuki Saito). 5.1 Microwave Thermal Therapies. 5.1.1 Introduction. 5.1.2 Classification by Therapeutic Temperature. 5.1.3 Heating Schemes. 5.2 Interstitial Microwave Hyperthermia. 5.2.1 Introduction and Requirements. 5.2.2 Coaxial-Slot Antenna. 5.2.3 Numerical Calculation. 5.2.4 Performance of the Coaxial-Slot Antenna. 5.2.5 Temperature Distributions Around the Antennas. 5.3 Clinical Trials. 5.3.1 Equipment. 5.3.2 Treatment by Use of a Single Antenna. 5.3.3 Treatment by Use of an Array Applicator. 5.3.4 Results of the Treatment. 5.4 Other Applications. 5.4.1 Treatment of Brain Tumors. 5.4.2 Intracavitary Microwave Hyperthermia for Bile Duct Carcinoma. 5.5 Summary. References. 6 Antennas for Wearable Devices (Akram Alomainy, Yang Hao and Frank Pasveer). 6.1 Introduction. 6.1.1 Wireless Body Area Networks. 6.1.2 Antenna Design Requirements for Wireless BAN/PAN. 6.2 Modelling and Characterization of Wearable Antennas. 6.2.1 Wearable Antennas for BANs/PANs. 6.2.2 UWB Wearable Antennas. 6.3 WBAN Radio Channel Characterization and Effect of Wearable Antennas. 6.3.1 Radio Propagation Measurement for WBANs. 6.3.2 Propagation Channel Characteristics. 6.4 Case Study: A Compact Wearable Antenna for Healthcare Sensors. 6.4.1 Application Requirements. 6.4.2 Theoretical Antenna Considerations. 6.4.3 Sensor Antenna Modelling and Characterization. 6.4.4 Propagation Channel Characterization. 6.5 Summary. References. 7 Antennas for UWB Applications (Zhi Ning Chen and Terence S.P. See). 7.1 UWB Wireless Systems. 7.2 Challenges in UWB Antenna Design. 7.3 State-of-the-Art Solutions. 7.3.1 Frequency-Independent Designs. 7.3.2 Planar Broadband Designs. 7.3.3 Crossed and Rolled Planar Broadband Designs. 7.3.4 Planar Printed PCB Designs. 7.3.5 Planar Antipodal Vivaldi Designs. 7.4 Case Study. 7.4.1 Small Printed Antenna with Reduced Ground-Plane Effect. 7.4.2 Wireless USB. 7.5 Summary. References. Index.

258 citations

References
More filters
Book
01 Jan 1982
TL;DR: The most up-to-date resource available on antenna theory and design as mentioned in this paper provides an extended coverage of ABET design procedures and equations making meeting ABET requirements easy and preparing readers for authentic situations in industry.
Abstract: The most-up-to-date resource available on antenna theory and design Expanded coverage of design procedures and equations makes meeting ABET design requirements easy and prepares readers for authentic situations in industry New coverage of microstrip antennas exposes readers to information vital to a wide variety of practical applicationsComputer programs at end of each chapter and the accompanying disk assist in problem solving, design projects and data plotting-- Includes updated material on moment methods, radar cross section, mutual impedances, aperture and horn antennas, and antenna measurements-- Outstanding 3-dimensional illustrations help readers visualize the entire antenna radiation pattern

14,065 citations

Proceedings ArticleDOI
P. J. Gibson1
01 Sep 1979
TL;DR: The Vivaldi Aerial is a new member of the class of aperiodic continuously scaled antenna structures and, as such, it has theoretically unlimited instantaneous frequency bandwidth as discussed by the authors, and can be made to conform to a constant gain vs. frequency performance.
Abstract: The Vivaldi Aerial is a new member of the class of aperiodic continuously scaled antenna structures and, as such, it has theoretically unlimited instantaneous frequency bandwidth. This aerial has significant gain and linear polarisation and can be made to conform to a constant gain vs. frequency performance. One such design has been made with approximately 10 dBI gain and ?20 dB sidelobe level over an instantaneous frequency bandwidth extending from below 2 GHz to above 40 GHz.

1,175 citations

Journal ArticleDOI
TL;DR: In this article, a simple formula is proposed to predict the frequency corresponding to the lower edge of the bandwidth for each of these configurations, including square, rectangular, and hexagonal disc monopole antennas.
Abstract: The circular disc monopole (CDM) antenna has been reported to yield wide-impedance bandwidth. Experiments have been carried out on a CDM that has twice the diameter of the reported disc with similar results. New configurations are proposed such as elliptical (with different ellipticity ratios), square, rectangular, and hexagonal disc monopole antennas. A simple formula is proposed to predict the frequency corresponding to the lower edge of the bandwidth for each of these configurations. The elliptical disc monopole (EDM) with ellipticity ratio of 1.1 yields the maximum bandwidth from 1.21 GHz to more than 13 GHz for voltage standing wave ratio (VSWR)<2.

866 citations

Journal ArticleDOI
TL;DR: In this paper, a moment method solution to the problem of input impedance and mutual coupling of rectangular microstrip antenna elements is presented, which uses the grounded dielectric slab Green's function to account rigorously for the presence of the substrate and surface waves.
Abstract: A moment method solution to the problem of input impedance and mutual coupling of rectangular microstrip antenna elements is presented. The formulation uses the grounded dielectric slab Green's function to account rigorously for the presence of the substrate and surface waves. Both entire basis (EB) and piecewise sinosoidal (PWS) expansion modes are used, and their relative advantages are noted. Calculations of input impedance and mutual coupling are compared with measured data and other calculatious.

714 citations

Journal ArticleDOI
TL;DR: In this article, the effect of mutual coupling between array elements on the performance of adaptive arrays is examined, including both steady state and transient performance, and the steering vector required to maximize the output signal-to-interference-plus-noise ratio (SINR) of Applebaum-type adaptive arrays with mutual coupling is also given.
Abstract: The effect of mutual coupling between array elements on the performance of adaptive arrays is examined. The study includes both steady state and transient performance. An expression for the steady state output signal-to-interference-plus-noise ratio (SINR) of adaptive arrays, taking into account the mutual coupling between the array elements, is derived. The expression is used to assess the steady state performance of adaptive arrays. The transient response is studied by computing the eigenvalues associated with the signal covariance matrix. The steering vector required to maximize the output SINR of Applebaum-type adaptive arrays in the presence of mutual coupling is also given.

713 citations