By Hiroaki Kogure
Written for amateur 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 publication exhibits the best way to use EM software program to investigate and song instant antennas to fulfill particular specifications. Readers research very important instant antenna layout terminology and achieve a close figuring out of ways antennas paintings. in addition, the publication bargains advice in troubleshooting issues of instant antenna designs. This authoritative reference additionally offers a whole assessment of the numerous other forms of antennas and similar EM instruments. DVD is incorporated! This identify includes Sonnet electromagnetics research software program, that includes instance records which are defined and illustrated within the booklet.
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Additional info for Introduction to Antenna Analysis Using EM Simulators (Antennas and Propagation)
Sample text
When we view the display at 560 MHz, where we have the best matching, we see the current is strongest in the center and at both ends goes to zero, and the antenna element is one-half a wavelength long. Simulation of a Yagi Antenna We provided a detailed description above because this is our first simulation. We next simulate a Yagi antenna. 34 Real and imaginary parts of the input impedance of the antenna. after drawing another element. 11 times wavelength, and the maximum gain is obtained. 11 times wavelength of 50 cm at 600 MHz.
Set Start to 50 MHz and Stop to 150 MHz. Select Project->Analyze and you will quickly have results. 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.
35 is displayed. When we view the display at 560 MHz, where we have the best matching, we see the current is strongest in the center and at both ends goes to zero, and the antenna element is one-half a wavelength long. Simulation of a Yagi Antenna We provided a detailed description above because this is our first simulation. We next simulate a Yagi antenna. 34 Real and imaginary parts of the input impedance of the antenna. after drawing another element. 11 times wavelength, and the maximum gain is obtained.