Books about Electrically from Amazon.com

A seminal reference to electrically small antennas for today's wireless and Wi-Fi world


This book is dedicated to the challenges posed by electrically small antennas and their solutions. Electrically small antennas have characteristics that limit performance: low radiation resistance, high reactance, low efficiency, narrow bandwidth, and increased loss in the matching network. Most of these limitations are shared by two other classes of antennas: superdirective and superconducting antennas. All three classes of antennas are thoroughly treated in three interrelated parts:
* Part One, Electrically Small Antennas, begins with a discussion of the fundamental limitations of bandwidth and matching, then provides detailed design information on loaded whips and dipoles, ferrite loops, patches with unusual substrates, and dielectric resonator antennas. In addition to exploring designs that work, the author sets forth antenna designs that are based on good physics yet are poor performers, as well as designs with both poor underlying physics and poor performance.
* Part Two, Superdirective Antennas, sets forth basic capabilities and limitations of superdirective antennas, both apertures and arrays, and investigates bandwidth, efficiency, and tolerances. The author explores the magnification of intrinsic matching circuit loss due to a large mismatch and evaluates the recent and promising non-Foster matching circuits.
* Part Three, Superconducting Antennas, reviews superconductivity concepts and new principles for dipole, loop, and patch antennas. The author concludes with a discussion of superconducting delay lines for wideband phased array steering.

Throughout the book, the author provides readers with a historical perspective, setting forth what has been investigated, what works, and what does not. Each part has its own author index and a list of references to help readers continue their explorations of particular topics.With the explosive demand for wireless and Wi-Fi, this seminal reference is essential reading for all antenna professionals and is recommended as a graduate-level course book..
Price: $80.60 [Notify me when price goes down.]

ISO 7176-21:2003 specifies requirements and test methods for electromagnetic emissions and for electromagnetic immunity of electrically powered wheelchairs and motorized scooters with a maximum speed of not more than 15 km/h for indoor and outdoor use by people with disabilities. It is also applicable to manual wheelchairs with an add-on power kit. It is not applicable to vehicles designed to carry more than one person.ISO 7176-21:2003 also specifies additional requirements for electromagnetic emissions and for electromagnetic immunity of electrically powered wheelchairs and motorized scooters with a built-in battery charger. It is not applicable to battery chargers that are not built into a wheelchair.A reference configuration is specified for adjustable wheelchairs and scooters to enable test results to be used for comparison of performance. This title may contain less than 24 pages of technical content..
Price: $96.00 [Notify me when price goes down.]

On the demand side, exporters and strategic planners focusing on copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated in Singapore face a number of questions. Which countries are supplying copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated to Singapore? How important is Singapore compared to others in terms of the entire global and regional market? How much do the imports of copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated vary from one country of origin to another in Singapore? On the supply side, Singapore also exports copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated. Which countries receive the most exports from Singapore? How are these exports concentrated across buyers? What is the value of these exports and which countries are the largest buyers? This report was created for strategic planners, international marketing executives and import/export managers who are concerned with the market for copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated in Singapore. With the globalization of this market, managers can no longer be contented with a local view. Nor can managers be contented with out-of-date statistics which appear several years after the fact. I have developed a methodology, based on macroeconomic and trade models, to estimate the market for copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated for those countries serving Singapore via exports, or supplying from Singapore via imports. It does so for the current year based on a variety of key historical indicators and econometric models. In what follows, Chapter 2 begins by summarizing where Singapore fits into the world market for imported and exported copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated. The total level of imports and exports on a worldwide basis, and those for Singapore in particular, is estimated using a model which aggregates across over 150 key country markets and projects these to the current year. From there, each country represents a percent of the world market. This market is served from a number of competitive countries of origin. Based on both demand- and supply-side dynamics, market shares by country of origin are then calculated across each country market destination. These shares lead to a volume of import and export values for each country and are aggregated to regional and world totals. In doing so, we are able to obtain maximum likelihood estimates of both the value of each market and the share that Singapore is likely to receive this year. From these figures, rankings are calculated to allow managers to prioritize Singapore compared to other major country markets. In this way, all the figures provided in this report are forecasts that can be combined with internal information sources for strategic planning purposes..
Price: $56.00 [Notify me when price goes down.]

On the demand side, exporters and strategic planners focusing on copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated in Sweden face a number of questions. Which countries are supplying copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated to Sweden? How important is Sweden compared to others in terms of the entire global and regional market? How much do the imports of copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated vary from one country of origin to another in Sweden? On the supply side, Sweden also exports copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated. Which countries receive the most exports from Sweden? How are these exports concentrated across buyers? What is the value of these exports and which countries are the largest buyers? This report was created for strategic planners, international marketing executives and import/export managers who are concerned with the market for copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated in Sweden. With the globalization of this market, managers can no longer be contented with a local view. Nor can managers be contented with out-of-date statistics which appear several years after the fact. I have developed a methodology, based on macroeconomic and trade models, to estimate the market for copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated for those countries serving Sweden via exports, or supplying from Sweden via imports. It does so for the current year based on a variety of key historical indicators and econometric models. In what follows, Chapter 2 begins by summarizing where Sweden fits into the world market for imported and exported copper stranded wire, cable, ropes, and plaited bands excluding electrically insulated. The total level of imports and exports on a worldwide basis, and those for Sweden in particular, is estimated using a model which aggregates across over 150 key country markets and projects these to the current year. From there, each country represents a percent of the world market. This market is served from a number of competitive countries of origin. Based on both demand- and supply-side dynamics, market shares by country of origin are then calculated across each country market destination. These shares lead to a volume of import and export values for each country and are aggregated to regional and world totals. In doing so, we are able to obtain maximum likelihood estimates of both the value of each market and the share that Sweden is likely to receive this year. From these figures, rankings are calculated to allow managers to prioritize Sweden compared to other major country markets. In this way, all the figures provided in this report are forecasts that can be combined with internal information sources for strategic planning purposes..
Price: $56.00 [Notify me when price goes down.]