Self-Complementary Antennas: Principle of Self-Complementarity for Constant Impedance

ISBN-13: 9781447112556 / Angielski / Miękka / 2011 / 128 str.

Yasuto Mushiake

Opis

An antenna with a self-complementary structure has a constant input impedance, independent of the source frequency and of the shape of the structure. The principle for this property of constant impedance was discovered by Professor Mushiake himself. This is the first study which comprehensively describes the principles of self-complementarity in antennas. It explains the theory which was the basis of the development of this principle and presents various engineering applications with an emphasis on extremely broadband self-complementary antennas. Self-Complementary Antennas will be of particular interest to antenna engineers working with extremely large bandwidths and more generally to electrical engineers with an interest in the development of the field since 1948.

Spis treści

1 Introduction.- 1.1 Self-complementary and related broad-band antennas.- 1.2 Background to the emergence of the self-complementary antenna.- 1.3 Brief history of self-complementary antennas.- 2 Fundamental Theories of Complementary Structures.- 2.1 A pair of mutually dual structures.- 2.2 Symmetrical and anti-symmetrical electromagnetic fields.- 2.3 Electromagnetic fields for complementary planar structures.- 3 Impedance Relationships for Complementary Planar Structures.- 3.1 Input impedances of mutually complementary two-terminal planar structures.- 3.2 Input impedances of mutually complementary multi-element planar structures.- 3.3 Examples of complementary planar structures.- 4 Origination of Self-Complementary Planar Structures and Discovery of their Constant-Impedance Property.- 4.1 Origination of self-complementary planar structures.- 4.2 Constant-impedance property of self-complementary planar structures.- 4.3 Examples of self-complementary planar structures.- 5 Multi-Terminal Self-Complementary Planar Structures.- 5.1 Rotationally symmetric multi-terminal self-complementary planar structures.- 5.2 Single-phase excitations for rotationally symmetric multi-terminal self-complementary planar structures.- 5.3 Axially symmetric multi-terminal self-complementary planar structures.- 5.4 Axially symmetric two-port self-complementary planar structures.- 5.5 Coupling-less property between loaded unipole-notch type self-complementary planar structures.- 6 Three-Dimensional Self-Complementary Structures.- 6.1 A pair of dual structures consisting of crossed infinite planar sheets of compound perfect conductors.- 6.2 Three-dimensional complementary structures.- 6.3 Three-dimensional self-complementary structures.- 6.4 Examples of three-dimensional self-complementary structures.- 7 Stacked Self-Complementary Antennas.- 7.1 Stacking of self-complementary antennas.- 7.2 Co-planar stacked self-complementary antennas.- 7.3 Some variations of co-planar stacked self-complementary structures.- 7.4 Side-by-side stacked self-complementary antennas.- 7.5 Compound-stacked self-complementary antennas.- 8 General Considerations about Approximations and Modifications of Self-Complementary Antennas.- 8.1 Approximations and modifications for practical purposes.- 8.2 Approximation by truncation.- 8.3 Approximation by replacement with conducting rods.- 8.4 Modification by deformation.- 8.5 Modification by partial excision.- 8.6 An example of transformation from a self-complementary sheet structure to the conducting rod structure.- 9 Developmental Studies of Rotationally Symmetric Self-Complementary Antennas.- 9.1 Alternate-leaves type self-complementary antenna.- 9.2 Approximation and modification of alternate-leaves type self-complementary antennas.- 9.3 Modified four-terminal self-complementary antenna on conical surface.- 9.4 Non-constant-impedance property of incorrectly arranged log-periodic structures.- 9.5 Other developmental studies for derivatives of rotationally symmetric self-complementary structures.- 10 Developmental Studies of Axially Symmetric Self-Complementary Antennas.- 10.1 Experimental study of equally spaced unipole-notch array antenna.- 10.2 Equally spaced unipole-notch array antenna on a conical ground plane for the circularly polarized wave.- 10.3 Unipole-notch alternate array antennas stacked on both edges of an angular conducting sheet.- 10.4 Unipole-notch array antennas formed on the substrate of a printed circuit.- 11 Monopole-Slot Type Modified Self-Complementary Antennas.- 11.1 Monopole-slot type antennas derived from the three-dimensional self-complementary antenna.- 11.2 A monopole-slot antenna element as a limiting case.- 12 Conclusion.- References.- Author Index.