A study of transient radiation from the Wu-King resistive monopole-FDTD analysis and experimental measurements

The cylindrical monopole antenna with a continuous resistive loading is considered as a radiator for temporally short, broad-bandwidth pulses. Specifically, the variation of the resistance used along the monopole is one proposed by Wu and King (1965). This antenna is analyzed by the finite-differenc...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1993-05, Vol.41 (5), p.668-676
Main Authors: Maloney, J.G., Smith, G.S.
Format: Article
Language:English
Subjects:
Antenna measurements
Antennas
Applied sciences
Displays
Electromagnetic fields
Electromagnetic transients
Exact sciences and technology
Finite difference methods
Loaded antennas
Radiocommunications
Resistors
Telecommunications
Telecommunications and information theory
Thin wall structures
Time domain analysis
Voltage
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Summary:The cylindrical monopole antenna with a continuous resistive loading is considered as a radiator for temporally short, broad-bandwidth pulses. Specifically, the variation of the resistance used along the monopole is one proposed by Wu and King (1965). This antenna is analyzed by the finite-difference-time-domain (FDTD) method utilizing a new, efficient technique for handling the thin-walled, conducting tube that forms the resistance. The electromagnetic field in the space surrounding the antenna is determined as a function of time, and quantities useful for describing the performance of the antenna are then calculated from these results. Graphical displays of the results are used to give new insight into the physical processes for transient radiation form this antenna. An experimental model is constructed using a discretized version of the Wu-King profile formed from a set of precision, high-frequency resistors. Measurements of both the reflected voltage in the feed line and the time-varying radiated field are in excellent agreement with the theoretical calculations.< >
ISSN:0018-926X
1558-2221
DOI:10.1109/8.222286