#reflection coefficient

[truphysics]

Acoustic Impedance

Introduction Acoustic impedance, denoted as $Z$, is a property of a medium which defines its opposition to the propagation of acoustic waves. It is a fundamental concept in fields such as acoustics, ultrasound, sonar, and other areas where sound propagation is crucial. Artistic representation of acoustic impedance as a sound wave is impeded by a central barrier. Definition of Acoustic…

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[ijtsrd]

Design and Implementation of 4 Elements Circular Patch Antenna with High Gain for 3.0 GHz Applications

By Olabisi .O | Ajao O. S | Adeniran A.O | Adgboyega O."Design and Implementation of 4 Elements Circular Patch Antenna with High Gain for 3.0 GHz Applications"

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-2 , February 2018,

URL: http://www.ijtsrd.com/papers/ijtsrd9596.pdf

Direct URL: http://www.ijtsrd.com/other-scientific-research-area/other/9596/design-and-implementation-of-4-elements-circular-patch-antenna-with-high-gain-for-30-ghz-applications/olabisi-o

indexed journal, call for paper engineering, life sciences journal

Microstrip patch antenna is a low profile antenna that is capable of maintaining high performance over a wide spectrum of frequencies. In this paper the practical and experimental results obtained from the design, construction and test of an array circularmicrostrip patch antenna were discussed. The aim was to obtain a gain of 12dB, an acceptable pattern and a reasonable reflection coefficient cavity model was applied to analyze the patch and proper combination of the formulae; ADS2000 and MATLAB 2013 softwares were used. The array includes four circular elements made of aluminum with equal sizes, equal spacing and was grown on a resin substrate, with insect feed techniques. Comparison between practical results and the results obtained from the simulation shows that we reach our goals by a great degree of validity.

[peeterjoot]

Impedance transformation

[mathjax]

[Click here for a PDF of this post with nicer formatting]

In our final problem set we used the impedance transformation for calculations related to a microslot antenna. This transformation wasn’t familiar to me, and is apparently covered in the third year ECE fields class. I found a derivation of this in [1], but the idea is really simple and follows from the reflection coefficient…

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