Small Antenna Handbook (Hardcover)

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 improving bandwidth using spherical helix dipoles, the exact derivation of Q for electrically small antennas for both TE and TM modes,??a new simplified Q formula developed by the authors, and discussions of metamaterials??and computer model accuracy for ESA.

The book begins with detailed electromagnetic derivations of Chu and Thal Q formulations, formulas for Q when ?? or ?? cores are used, and effects of loss on Q. It also includes a treatise on bandwidth and matching, and Foster's reactance theorem, as well as up-to-date coverage of canonical antennas: dipoles, loops, self-resonant ESA, PIFA, and dielectric resonator antennas.

Just as this book offers the concrete facts on relevant developments in the field, it also clears up confusion regarding findings that have not turned out to be useful. Presented here are antenna ideas that are clever but with performance numbers that are poor, as well as eighteen more antenna ideas that are simply not to be believed. The book concludes with recent data on the use of self-resonant elements in superdirective antennas and new delay line data on superconducting antennas.

Each chapter features extensive references and an author list. In addition, helpful appendices cover a world history of ESA, antenna terms important to ESA, a paper on NIM shells enclosing an ESA dipole, and analytical errors associated with perfect lenses and sub-wavelength focusing. Small Antenna Handbook is ideal for practicing engineers in the telecommunications and national defense areas, as well as for upper-level undergraduate and graduate students.

本書詳細解釋了小型天線的工作原理以及提升其性能的方法。

本書探討了電氣小天線（ESA）領域中最近的重要理論和實踐發展。它介紹了既能正常工作又有限制的天線設計，提供了有關電磁耦合結構和使用球形螺旋偶極天線改善頻寬的最新信息，以及作者們開發的電氣小天線TE和TM模式下Q值的精確推導，以及對於ESA的超材料和計算機模型準確性的討論。

本書首先詳細介紹了Chu和Thal Q公式的電磁推導，以及在使用??或??核心時的Q值公式和損耗對Q值的影響。它還包括對頻寬和匹配的論述，以及Foster的反應定理，以及對典型天線的最新涵蓋範圍：偶極天線、環形天線、自共振ESA、PIFA和介電共振器天線。

正如本書提供了該領域相關發展的具體事實，它也澄清了一些結果並不實用的發現。本書介紹了一些天線設計非常巧妙但性能非常差的想法，以及其他十八種天線設計根本難以置信的想法。本書最後還提供了有關在超指向性天線中使用自共振元件的最新數據，以及超導天線的新延遲線數據。

每章都提供了廣泛的參考文獻和作者列表。此外，有用的附錄涵蓋了ESA的世界歷史、對ESA重要的天線術語、一篇關於封裝ESA偶極天線的NIM外殼的論文，以及與完美透鏡和亞波長聚焦相關的分析誤差。《小型天線手冊》非常適合從事電信和國防領域的實踐工程師，以及高年級本科生和研究生。