By Hiroaki Kogure
ISBN-10: 160807157X
ISBN-13: 9781608071579
Written for amateur engineers and engineering scholars, this easy-to-comprehend source deals readers thorough introductory-level therapy of antenna research utilizing electromagnetic (EM) simulators. This richly-illustrated booklet exhibits how one can use EM software program to investigate and song instant antennas to satisfy particular standards. Readers study vital instant antenna layout terminology and achieve a close realizing of the way antennas paintings. furthermore, the booklet bargains assistance in troubleshooting issues of instant antenna designs. This authoritative reference additionally presents an entire assessment of the numerous other forms of antennas and comparable EM instruments. DVD is integrated! This name comprises Sonnet electromagnetics research software program, that includes instance records which are defined and illustrated within the ebook.
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Extra info for Introduction to Antenna Analysis Using EM Simulators (Antennas and Propagation)
Example text
7 Simulation result for S11. The antenna resonates at around 60 MHz, contrary to expectation. 7 is the simulation result for S11, and we see that it appears to resonate at around 60 MHz, which is nearly half the 107 MHz calculated above from the size of the antenna. ) This is due to the large patches on the end of the dipole. This technique of lowering the resonant frequency of a dipole antenna is called capacitive end loading. Why did Hertz use spheres connected by rods and wires for his antennas?
It has only one direction of vibration: along the direction it is traveling. If light is polarized, then it must be vibrating side-to-side, perpendicular to the direction it is traveling. This is called a transverse wave. The direction of polarization for an electromagnetic wave refers to the direction of vibration of the electric field. When placing a dipole antenna vertically above ground, the electric field vector is also vertical, and we call it a vertical polarization. Marconi’s antennas were vertically polarized.
27 Simulated current on Marconi’s monopole and an artificial ground. 28 Near field around Hertz’s dipole and a dipole made of metallic wire. All quantities are varying sinusoidally with time; they are illustrated for a single instant.
Introduction to Antenna Analysis Using EM Simulators (Antennas and Propagation) by Hiroaki Kogure
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