By Hiroaki Kogure
Written for beginner engineers and engineering scholars, this easy-to-comprehend source bargains readers thorough introductory-level remedy of antenna research utilizing electromagnetic (EM) simulators. This richly-illustrated booklet exhibits find out how to use EM software program to research and track instant antennas to satisfy particular specifications. Readers examine very important instant antenna layout terminology and achieve an in depth figuring out of the way antennas paintings. furthermore, the publication deals tips in troubleshooting issues of instant antenna designs. This authoritative reference additionally offers an entire evaluation of the numerous other forms of antennas and similar EM instruments. DVD is integrated! This name comprises Sonnet electromagnetics research software program, that includes instance documents which are defined and illustrated within the ebook.
Read or Download Introduction to Antenna Analysis Using EM Simulators With DVD ROM (Artech House Microwave Library) PDF
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Additional resources for Introduction to Antenna Analysis Using EM Simulators With DVD ROM (Artech House Microwave Library)
Example text
2), the large metallic balls and metallic plates at both sides of the transmitting device are like a large-scale capacitor. The rod that connects them is like an inductor. 3), electric energy (capacitance) is stored between the small balls and magnetic energy is stored around the loop. Electromagnetic resonance happens when energy flows back and forth between electric and magnetic energy. The frequency with which the energy flows back and forth is the resonant frequency. 12 is a simple model of Hertz’s receiver in Sonnet Lite.
As for the Sonnet simulation space, the four substrate edges each mark one of four perfectly conducting side walls. 22 Dialog box to rotate the antenna. 23). The edge of the substrate marks a perfectly conducting sidewall, making this a ground-image antenna. Previously, port 1 excited a voltage between the two halves of the dipole. Now, that same port is exciting a voltage between the half dipole and the ground plane. An antenna like this is called a monopole. 24 is a plot of S11 showing results of both the monopole and the dipole.
Selecting Plot->Response->Current changes the display to charge distribution. We can confirm that a strong current has been stored on the metallic squares at both ends of the antenna at the resonant frequency of 60 MHz. 8 The Leiden jar, this one on display at Leiden University, might have been an inspiration for the form of Hertz’s antennas. 9 Surface charge distribution on the surface of square elements. 1, right) predicted the existence of electromagnetic waves. We can imagine how Hertz’s apparatus generates Max- Antennas and Radio Waves 37 well’s waves from a thought experiment starting with a parallel plate capacitor.