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A truncated biconical antenna showing the typical "mace head" shape. In radio systems, a biconical antenna is a broad-bandwidth antenna made of two roughly conical conductive objects, nearly touching at their points. [1] Biconical antennas are broadband dipole antennas, typically exhibiting a bandwidth of three octaves or more.
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 ...
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.
Forms of the reciprocity theorems are used in many electromagnetic applications, such as analyzing electrical networks and antenna systems. [1] For example, reciprocity implies that antennas work equally well as transmitters or receivers, and specifically that an antenna's radiation and receiving patterns are identical.
Selected uses in antenna theory include the analysis of aperture antennas [9] and the cavity model approach for microstrip patch antennas. [10] It has also been used as a domain decomposition method for method of moments analysis of complex antenna structures. [11] Schelkunoff's formulation is employed particularly for scattering problems. [2 ...
Omnidirectional radiation patterns are produced by the simplest practical antennas, monopole and dipole antennas, consisting of one or two straight rod conductors on a common axis. Antenna gain (G) is defined as antenna efficiency (e) multiplied by antenna directivity (D) which is expressed mathematically as: =.
William Ittner Orr (1919–2001) was an engineer, educator, communicator, and ham radio operator. [1] [2] [3] He was the American author of numerous amateur radio and radio engineering texts.