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The biconical antenna has a broad bandwidth because it is an example of a traveling wave structure; the analysis for a theoretical infinite antenna resembles that of a transmission line. For an infinite antenna, the characteristic impedance at the point of connection is a function of the cone angle only and is independent of the frequency.
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The discone antenna has a useful frequency range of at least 10 to 1. [2] [3] When employed as a transmitting antenna, a properly constructed discone is just as efficient as an antenna designed for a more limited frequency range. The extra bandwidth comes from the controlled taper and large termination radius of the cone.
Inevitably some antennas won't conveniently fit into any one basic type, so the last section on real antennas is an "everything else" category for a few peculiar antennas that don't fit cleanly into any of the categories or subcategories used in this article; for example, random wire antennas and antennas that are laid down on the ground ...
Created Date: 8/30/2012 4:52:52 PM
A horn antenna serves the same function for electromagnetic waves that an acoustical horn does for sound waves in a musical instrument such as a trumpet. It provides a gradual transition structure to match the impedance of a tube to the impedance of free space, enabling the waves from the tube to radiate efficiently into space. [11]
Download as PDF; Printable version ... average terrain – Antenna noise temperature – Antenna theory ... oscillator – Bel – Biconical antenna – Big ugly dish ...
Collin also co-authored with Robert Plonsey an undergraduate level textbook Principles and Applications of Electromagnetic Fields, authored an intermediate level textbook Antennas and Radiowave Propagation, co-edited with Francis Zucker an advanced level two-volume textbook Antenna Theory, and finally co-authored with Robert Hansen his last ...