Published April 22, 2008
by Ieee .
Written in English
|The Physical Object|
|Number of Pages||416|
Book description. Uniquely explains in detail how small antennas work and ways to improve their performance. This book addresses the recent significant theoretical and practical developments in the electrically small antenna (ESA) area.??Examining antenna designs that work as well as those that have limitations, it offers the latest information on electromagnetically coupled structures and. A wide variety of small antennas is covered, and design and practice steps are described for each type: electrically small, functionally small, physically constrained small and physically small. Whether you are a professional in industry, a researcher, or a graduate student, this is your essential guide to small by: 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 Cited by: small size. Definition of “Electrically Small” There are various rules of thumb for con-sidering an antenna to be electrically small. The most common definition is that the largest dimension of the antenna is no more than one-tenth of a , .
virtually all electrically small antennas. In some manner, all electrically small antenna designs can be shown to be derivatives of the simple straight-wire dipole, monopole, or loop antennas.* The straight-wire dipole and circular loop antennas are depicted in Figure The straight-wire dipole has an overall length l and a conductor diameter d. 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) . made between the different small antennas. An antenna is considered to be electrically small as a function of its overall size or occupied volume relative to the wavelength. A small antenna is one where. ka ≤ , where. k. is the free space wavenumber, 2. π / λ, and. a. is the radius of an imaginary sphere. 13 Antennas for Shortwave Reception 14 Large Wire Loop Antennas 15 Small Loop Receiving Antennas 16 Small Transmitting Loop Antennas 17 Antenna Modeling Software 18 VHF/UHF Transmitting and Receiving Antennas 19 Microwave Waveguides and Antennas 20 Antenna Noise Temperature 21 Antennas for Radio Astronomy 22 Adjusting, Installing, and .
"This book addresses the recent significant theoretical and practical developments in the electrically small antenna area. It explains work on electromagnetically coupled structures, improving bandwidth using spherical helix dipoles, the exact derivation of the Q for electrically small antennas for both TE and TM modes, a new simplified Q formula developed by the authors, and provideds an. electrically small antenna, the electric and magnetic field pha ses diverge. Close to an electrically small antenna, these fields are in phase quadrature, i.e., 90° out of phase. Prior to joining MITRE, he was with the Air Force Research Laboratory (AFRL/SNHA) where his research interests included electrically small antennas, wideband radiating elements, conformal antennas, phased arrays, communication antennas and the application of novel materials in antenna design. Publication Year: ISBN: ×. Small Antenna Design describes the theory behind effective small antenna design and give design techniques and examples for small antennas for different operating frequencies. Design techniques are given for the entire radio spectrum, from a very hundred kilohertz to the gigahertz range. Unlike other antenna books which are heavily mathematical.