【2019.02】宽频与多频天线Wide-range and multi-frequency antennas，共254页。

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扩大天线频率范围是本书的主要目标。

Expanding the range of antenna frequency is the main objective of this book. 

本书提出的解决方案是基于分析与合成天线的新的理论方法。

Solutions proposed are based on the development of new theoretical methods for analyzing and synthesizing antennas. 

本书的研究表明，沿线性和V形天线连接的集中电容负载在较宽的频率范围内提供了与电缆的高匹配水平，并改善了天线的方向特性，即增加了通信距离。

The book shows that concentrated capacitive loads connected along linear and V-antennas provide a high level of matching with a cable over a wide frequency range and improves directional characteristics of antennas, i.e. increases the communication distance.

本书提出了分析和综合考虑中的天线的新的理论方法：1）计算给定电流分布的辐射器方向特性的方法；2）计算复杂多单元辐射结构之间的和总场的静电模拟方法。

New theoretical methods are proposed for analysis and synthesis of antennas under consideration: 1) method of calculating directional characteristics of radiators with a given current distribution, and 2) method of electrostatic analogy for calculating mutual and total fields of complex multi-element radiating structures. 

这些方法使我们能够获得具有集中电容的指向型天线（八木天线阵）和对数周期天线的最佳方向特性，并表明使用电容器可以扩大指向天线的频率范围，减小对数周期天线的尺寸。

These methods allow us to obtain optimal directional characteristics for director-type antennas (arrays of Yagi-Uda) and log-periodic antennas with concentrated capacitances and show that use of capacitors makes it possible to extend the frequency range of the director antennas and to decrease dimensions of the log-periodic antennas.

提出了一种多单元（平面和三维）自互补天线，该天线具有不同的电磁极和电缆与天线连接方式，从而提高了与电缆的匹配性。

Multi-element (flat and three-dimensional) self-complementary antennas with different variants of connecting generator poles and cable wires to antenna elements are proposed, which improves the matching with a cable. 

将平面结构的特征与体积结构的特征进行了比较，包括：圆锥形、抛物线形和位于金字塔边缘。

Characteristics of flat structures are compared with characteristics of volume structures: conical, parabolic, and located on a pyramid edges.

本书介绍了透明天线、蜂窝通信天线、多层和多辐射器天线等新内容。

The book describes new versions of transparent antennas, antennas for cellular communication, multi-tier and multi-radiator antennas, and much more.

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