Analysis of the radiation Resistance and Gain of Full-Wave Dipole Antenna for Different Feeding Design

Abstract

This paper demonstrates the analysis of antenna pattern and gain for different designs of full-wave dipole antenna feeding techniques. Seven such techniques were studied and analyzed; symmetrical dual feeding in phase, symmetrical dual feeding out of phase, asymmetrical dual feeding in phase, asymmetrical dual feeding out of phase, symmetrical triple feeding in phase and symmetrical triple feeding out of phase. Symmetrical dual feeding in phase produced high gain as compared to the single and center-fed antennas. An improvement of about 3 to 3.5 dB was achieved comparing to center tap fed and off center fed. It was found that an asymmetrical dual feeding in-phase provides good performance, considering the directivity, pattern, and input impedance. A 2.46 dB gain has been attained. It was found that a symmetrical triple feeding provides an overall best performance with respect to gain, radiation pattern, beam width and input impedance

On the Remarkable Features of the Lower Limits of Charge and the Radiated Energy of Antennas as Predicted by Classical Electrodynamics

“…Note that the current goes to zero at the ends of the antennas. The radiation fields generated by an antenna excited by the current described in Equations (1) and (2) are given by [5,6,13,14]:…”

“…Note that the current goes to zero at the ends of the antennas. Based on the assumption of a sinusoidal current distribution, the current at any point z on the antenna is given by [5,6,13,14] Iptq " I 0 sin " 2π λˆL 2´z˙* e jωt for 0 ď z ď L{2 (1)…”

Wideband Matching of Full-Wavelength Dipole With Reflector for Base Station

“…However, to the best of our knowledge, there are few published studies on full-wavelength dipoles. Offset-feeding [2][3][4] and dual/triple-feeding [5][6][7][8] are the only available methods published in the literature. Offset-feeding is realized by moving the feed point away from the center of the dipole.…”

“…However, according to [3,4], the offset-feeding can deteriorate the radiation performance by introducing split lobes. Investigations in [5][6][7][8] show that a full-wavelength dipole can be better fed by employing additional feed points. But both of these methods feature high fabrication complexity.…”

Wideband feeding method for full-wave dipole

“…However, to the best of our knowledge, there are few published studies on full-wave dipoles. Offset-feeding [2,3] and dual/triple-feeding [4,5] are the only available methods published in the literature. Offset-feeding is realized by moving the feed point away from the center of the dipole.…”