[Legacy Report] Electrically Short Antenna: Passive & Active Antenna for General Applications

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This tutorial looks at electrically small antennas, which have always been, and will continue to be, an important part of radio communications, especially in portable applications. Electrically small antennas are of interest in a variety of applications, particularly where the antennas must be unobtrusive. The performance properties
considered in the design of small antennas typically include impedance, radiation efficiency, pattern shape,polarization and particularly operating bandwidth and quality factor (Q). In this paper, we compare the performance properties of both passive and active antenna for the applications in current and later generation communication systems.

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