Semi-elliptic-coverage geometric-based stochastic channel modeling for smart antenna arrays with oscillating beam patterns

2002 ◽  
Author(s):  
S.A. Zekavat ◽  
C.R. Nassar
Keyword(s):  
Antenna Arrays ◽  
Smart Antenna ◽  
Channel Modeling ◽  
Beam Patterns

scholarly journals The features of the use of the waveguide radiators in smart antenna systems

2018 ◽  
Vol 26 (1) ◽  
pp. 89-92
Author(s):  
V. M. Morozov ◽  
V. I. Magro
Keyword(s):  
Integral Equation ◽  
Antenna Array ◽  
Antenna Arrays ◽  
Smart Antenna ◽  
Integral Equation Method ◽  
Thin Plates ◽  
Coupling Region ◽  
Five Elements ◽  
Antenna Systems ◽  
Selection Of

The features of the use of finite waveguide antenna arrays in the structure of modern smart antenna systems are considered. The paper deals with the problem of diffraction of an electromagnetic wave on a finite waveguide antenna array scanning in the E-plane. Antenna array consists of five radiating elements. The open ends of the waveguides are surrounded by a metal screen. The resonator coupling region was chosen as matching elements. The solution of the problem is carried out by the integral equation method on the basis of the selection of overlapping regions. The problem reduces to solving the Fredholm integral equation of the second kind. An array of infinitely thin plates and that of waveguides with a finite wall thickness are considered. The main regularities for choosing the optimal geometric dimensions of the antenna array are established. Studies were carried out for arrays with a number of elements from five to fifteen. The analysis of edge effects in the final antenna array is carried out. It is shown that the introduction of a resonator region into a five-element lattice makes it possible to expand the sector of the radiation angles and avoid the effect of blinding. It is shown that this statement is valid not only for five-element lattices, but also for arrays with a large number of radiating elements. The radiation patterns are calculated. The  coefficients of mutual coupling in an array with five elements are investigated. General recommendations for choosing optimal sizes of the resonator coupling region of radiators are considered.

Time-Modulated Antenna Arrays for Circularly Polarized Shaped Beam Patterns

2017 ◽  
Vol 16 ◽  
pp. 1537-1540 ◽  
Author(s):  
Alberto Reyna ◽  
Luz I. Balderas ◽  
Marco A. Panduro
Keyword(s):  
Antenna Arrays ◽  
Circularly Polarized ◽  
Shaped Beam ◽  
Beam Patterns
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