Research on the transmission characteristics of the pulse voltage and current on dipole antennas

Abstract

The static distributed capacitances between two arms of dipole antennas are calculated by a finite‐difference method. An equivalent circuit for dipole antennas is proposed. A corresponding time‐domain approach for solving the voltage and current of this circuit is given. Some phenomena occurring in the transmitting procedure are discussed. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 165–168, 2000.

Study on the Characteristics of A Compact Ultra Wideband Antenna

“…References [4] indicated that the rapid variation of the distributed unit length capacitance along the dipole rods is one of the reasons of current reflection and impedance mismatch. To compensate the distributed capacitance along dipole rods is a good means for decreasing the reflection.…”

“…Recently, several successful designs of dipole antenna for UWB systems are reported [1][2][3], where the dipole configurations are bow-tie, circular and elliptical, etc. In [4], the transmission characteristics of the pulse voltage and current on dipole antenna and the pulse radiation mechanism of the dipole antenna are studied. Based on the analysis, the author proposed, in the last of the paper, a dipole with smooth distributed capacitance, which may be suitable for pulse radiation.…”

“…Based on the analysis, the author proposed, in the last of the paper, a dipole with smooth distributed capacitance, which may be suitable for pulse radiation. Based on the work in [4], a new sort of wideband antenna is proposed in this paper. The proposed antenna is composed of a leaf-like dipole and a dielectric block.…”

“…Based on theoretical analysis, the author proposed, in the last of the paper, the spindle-like antenna, which section plane like a leaf as shown in Fig. 1, can partly compensate the rapid changing of the distributed capacitance along dipole rods, especially in the feeding region [4]. Apart from the shape changing, loading with dielectric in the feed point region can also have the capacitance compensating effect.…”

Study on the Applicability of Extracted Distributed Circuit Parameters of Non-Uniform Transmission Lines by Equivalent Circuit Method

“…The methods used in this paper are the FDTD method for field calculation and the circuit finite difference method for circuit parameters calculation. The idea of this paper can be described as following: the field results of non-uniform transmission line are obtained by FDTD and PML method at a certain frequency; the distributed circuit parameters are then extracted from the field results by solving the transmission line equations (telegraph equations), and an equivalent circuit based on these distributed parameters is constructed; after then, a Gaussian pulse is excited into the equivalent circuit, and the equivalent circuit method proposed in [19] is used to obtain the voltage and current waveforms at any point of the equivalent circuit; finally, by comparing the voltage waveforms obtained respectively by the equivalent circuit method and FDTD, the applicability of the extracted distributed circuit parameters can be studied. A 90 degree bent microstrip line is taken as an example in this paper.…”