scholarly journals Optimized VAA Based Synthesis of Elliptical Cylindrical Antenna Array for SLL Reduction and Beam Thinning Using Minimum Number of Elements

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Heba S. Dawood ◽  
Heba A. El-Khobby ◽  
Mustafa M. Abd Elnaby ◽  
Amr H. Hussein
Keyword(s):  
Antenna Array ◽  
Cylindrical Antenna ◽  
Minimum Number

scholarly journals A 1-to-8 Fully Modular Stacked SIW Antenna Array for Millimeter-Wave Applications

2022 ◽  
Author(s):  
Cleofás Segura-Gómez ◽  
Ángel Palomares-Caballero ◽  
Pablo Padilla
Keyword(s):  
Antenna Array ◽  
Power Distribution ◽  
Main Beam ◽  
Impedance Bandwidth ◽  
Beam Direction ◽  
Array Design ◽  
Horn Antennas ◽  
Array Configuration ◽  
Minimum Number ◽  
Measured Impedance

This paper presents a vertically stacked SIW antenna array that enables different array configurations with the minimum number of SIW layers. This achievement lies in the modular feature offered by the proposed design. Specifically, 4 distinct array configurations can be produced with only 3 different design of SIW layers. Depending on the number of SIW layers employed in the stacked antenna, the directivity in the E-plane of radiation is modified. To obtain an equal and in-phase power distribution among the array elements, H- and E-plane corporate feeding networks are efficiently implemented in each array configuration. Array configurations of 1, 2, 4 and 8 radiating layers are offered by the proposed modular array, where each radiating layer is formed by 8 H-plane SIW horn antennas. The simulated directivity for the array configurations ranges from 15.8 dBi to 23.8 dBi and the main beam direction remains fixed along the operating frequency band. The array design has been manufactured and proper agreement between simulated and measured results are observed. The measured impedance bandwidth in all the array configurations is from 35 GHz to 41 GHz (15.79% bandwidth) with a reduction in the E-plane beamwidth as the number of radiating layers increases.

scholarly journals Features of application of ESPRIT method for different configurations of antenna arrays

2021 ◽  
pp. 30-37
Author(s):  
M. E. Shevchenko ◽  
A. B. Gorovoy ◽  
V. M. Balashov ◽  
S. N. Solovyov
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Simulation Modeling ◽  
Practical Implementation ◽  
Radio Sources ◽  
Computational Costs ◽  
Array Configuration ◽  
Multichannel Data ◽  
Minimum Number ◽  
Shift Invariance

The paper discusses the features of the application of the ESPRIT method, which provides direction finding of a variety of radio sources with minimal computational costs, including in real time. To be able to use ESPRIT, antenna arrays are required that have the property of shift invariance, and for practical implementation, antenna arrays are required that allow you to form estimates of the directions of arrival of the largest number of signals that overlap in the spectrum, with a minimum number of antennas and reception channels. The aim of the work is to analyze the influence of the antenna array configuration on the features of ESPRIT application for different antenna array with the same number of antennas. A comparative qualitative analysis of the properties and features compared to the MUSIC method is presented. The algorithms developed by the authors for processing multichannel data received by angle and square antenna arrays are presented. It is shown analytically that when using a corner antenna array, it is necessary to take into account the possible presence of signals from indistinguishable-mirror directions of arrival. With a square antenna array, there are no mirror directions of arrival of different signals, which simplifies the implementation of the algorithm. It is shown analytically and by simulation modeling that the configuration of a square antenna array allows to increase the number of simultaneously tracked signals that overlap in the spectrum, compared to a corner antenna array with the same number of antennas.

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