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Radiation pattern of cylindrical‐wraparound chirostrip antennas
Microwave and Optical Technology Letters, 1999In this paper, a cylindrical-wraparound microstrip antenna flush mounted to the upper surface of a chiral substrate is analyzed. The chiral substrate is wrap fabricated around a conducting core cylinder. Dyadic Green's functions for such a cylindrical structure are formulated in terms of cylindrical vector wave eigenfunctions.
Li, L.-W., Zhao, T.-X., Leong, M.-S.
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Calculating antenna radiation patterns
Electrical Engineering, 1944CALCULATIONS of the horizontal relative field patterns of antennas are long and laborious and increase in complexity with the number of antenna elements employed. Present calculating machines are useful only for antenna-beam arrays consisting of not over three elements.
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A reconfigurable radiation pattern metamaterial-inspired antenna
2014 Loughborough Antennas and Propagation Conference (LAPC), 2014In this work, a reconfigurable radiation pattern metamaterial-inspired antenna is proposed. The structure consists of simple split resonator (SRR) loaded with two open circuits and introduced into the near field region of a monopole antenna. Two configurations are studied by considering the state of the open circuits.
Dakhli, Saber +4 more
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On the radiation pattern of a multibeam antenna
IEEE Transactions on Antennas and Propagation, 1976The optimum radiation of a lens antenna with an array feed of M elements is desired, which will exhibit maximum gain in a number ( k ) of specified directions and nulls in other ( j ) specified directions. This optimum is not derived; however, a condition for the optimum is shown to be some superposition of just ( k + j ) individual radiation patterns ...
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Radiation Pattern Antenna System Measurement
2021 13th International Conference on Measurement, 2021The article deals with measuring the radiation characteristics of the antenna system in conditions of very high electromagnetic fields and the presence of other interfering signals.
Michal Dzuris +3 more
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On the Radiation Patterns of Interfacial Antennas
1982The radiation pattern of an interfacial radiating source is obtained for the case where the source is an infinitely long line source lying along the plane interface of two dielectric half-spaces; for the case where the source is an infinitesimal electric dipole vertically located on the interface; and for the case where the dipole is lying horizontally
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Radiation pattern of a borehole radar antenna
Geophysics, 2005Abstract The finite-difference time-domain method was used to simulate radar waves that were generated by a transmitting antenna inside a borehole. The simulations were of four different models that included features such as a water-filled borehole and an antenna with resistive loading.
Karl J. Ellefsen, David L. Wright
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A radiation pattern reconfigurable yagi antenna
2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP), 2017A planar Yagi antenna with configurable radiation pattern is proposed in this paper. The single planar Yagi antenna structure with unidirectional radiation is designed firstly, and the radiation pattern reconfigurable antenna is consist of four planar Yagi antenna and a RF switch element.
Bing-Long Zheng +3 more
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Analysis of the radiation patterns of reflector antennas
IEEE Transactions on Antennas and Propagation, 1976The development and application of a numerical technique for the rapid calculation of the far-field radiation patterns of a reflector antenna from either a measured or computed feed pattern are reported. The reflector is defined by the intersection of a cone with any surface of revolution or an offset sector of any surface of revolution.
J. Kauffman, W. Croswell, L. Jowers
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Radiation pattern analysis of reflector antennas
Electronics and Communications in Japan (Part I: Communications), 1985AbstractA method is proposed for accurately calculating the radiation pattern of reflector antennas in the entire angular range from the main beam direction to the off axis region. The principle of the method is similar to the physical optics diffraction theory, and consists of the result obtained by conventional physical optics corrected with the ...
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