Topic
Reflective array antenna
About: Reflective array antenna is a research topic. Over the lifetime, 4366 publications have been published within this topic receiving 57884 citations.
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01 Jan 2007
TL;DR: In this paper, an efficient procedure is proposed to predict the performance of large finite arrays from a smaller array, which depends on the knowledge of the mutual admittance matrix of the small array.
Abstract: An efficient procedure is proposed to predict the performance of large finite arrays from a smaller array. The procedure depends on the knowledge of the mutual admittance matrix of the small array. The mutual admittance matrix of the large array is constructed from the small array ignoring the coupling beyond the small array size. Once the mutual admittance is constructed the effective input impedances of the array elements under different scanning directions and different power distributions are computed. An air filled microstrip antenna is considered. The results obtained using the present method is verified by a full wave numerical analysis of the large array. (5 pages)
13 citations
01 Nov 1968
TL;DR: In this paper, the radiation properties of a simple spherical phased array of 16 flat spiral antennas have been investigated experimentally over a frequency range of 0.6 GHz to 3 GHz, and the results indicated that such an array is capable of operating with widely spaced antenna elements.
Abstract: The radiation properties of a simple spherical phased array of 16 flat spiral antennas have been investigated experimentally over a frequency range of 0.6 GHz to 3 GHz. The results obtained indicate that such an array is capable of operating with widely spaced antenna elements. The spherical array surface considerably reduces the grating lobe amplitudes in the pattern, thereby making the array broad-band. The polarization characteristics of the radiation field were also studied.
13 citations
15 Jun 1987
13 citations
TL;DR: In this paper, a novel circular array of 90 equally spaced vertical dipoles is described, driven by just one element, which is resonant with large currents in each element and set up a far field that consists of 90 sharp spikes separated by 90 nulls.
Abstract: A novel circular array of 90 equally spaced vertical dipoles is described. It is driven by just one element. When the spacing, length, and radius of the identical elements are properly chosen, the entire array is resonant with large currents in each element. These alternate 180/spl deg/ in phase and set up a far field that consists of 90 sharp spikes separated by 90 nulls. When dimensioned for a microwave frequency of 3 GHz, the array generates a field pattern that can be applied to provide a microwave beacon and guiding signals for aircraft approaching an airport. These would supplement the normal central high-intensity light and the approach lights, and provide a potentially useful guidance system for coastal airports embedded in dense fog that obscures the lights.
13 citations
TL;DR: In this paper, the concept of antenna beam steering by variable surface impedance loading is investigated and it is shown that if an electric dipole is mounted over a prolate spheroid with a variable SA, then the radiated beam can be scanned considerably.
Abstract: The concept of antenna beam steering by variable surface impedance loading is investigated. It is shown, as an example, that if an electric dipole is mounted over a prolate spheroid with a variable surface impedance, then the radiated beam can be scanned considerably. This is achieved provided that the real part of the surface impedance can obtain both negative and positive values. The possible realization of such a scheme is briefly discussed.
13 citations