Sarmad Ahmed Shaikh

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Áreas de atuação

Produções bibliográficas

• SHAIKH, S. A. . Two Axis Direction Finding Antenna system using Sum Difference Patterns in X Band. Microwave and Optical Technology Letters , v. 00, p. 0000, 2015.

Projetos de pesquisa

• 2014 - 2015

  Two Axis Direction Finding Antenna System using difference-sum patterns in X band, Descrição: This work proposes the direction finding antenna system in two axis (θ_1, θ_2) in X band using sum (∑) and difference (∆) patterns of received signal. Direction finding system is constructed by implementing the microstrip patch antenna array and 〖180〗^0 hybrid rat race ring coupler which generates ∑ and ∆ patterns of two received RF signals. Initially, direction of arrival (DOA) is obtained in one axis, (θ_1), vertical direction, using the ∑ - ∆ patterns of antenna array of two elements. Using the equations of ∑ and ∆ of two input signals, radiation patterns at different θ values have been observed in simulation and compared with measured pattern values of constructed circuit. By taking the ratio of ∆ to ∑ patterns, DOA has been estimated of designed circuit. Another circuit similar to first circuit, oriented at 〖90〗^0 (horizontal direction) has been implemented to estimate the DOA (θ_2) in other axis. By taking the 3D radiation patterns of each circuit in anechoic chamber, both circuits are measured for performance; and from 0 to 40 degrees DOA has been observed with rms error of less than 5^0 in both axis. At 10 GHz operating frequency, experimental results, using material RT Duroid 5880, show that satisfactory performance can be achieved with proposed setup.. , Situação: Concluído; Natureza: Pesquisa. , Alunos envolvidos: Mestrado acadêmico: (0) . , Integrantes: Sarmad Ahmed Shaikh - Coordenador.

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