Details

Autor(en) / Beteiligte

• Wen, Ya-Qing
• Wang, Bing-Zhong
• Ding, Xiao

Titel

A Wide-Angle Scanning and Low Sidelobe Level Microstrip Phased Array Based on Genetic Algorithm Optimization

Ist Teil von

• IEEE transactions on antennas and propagation, 2016-02, Vol.64 (2), p.805-810

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2016

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• In order to obtain a wide-angle scanning and low sidelobe level (SLL) microstrip phased array with a finite metal ground, a novel microstrip phased array based on microstrip magnetic dipole is presented in this communication. Microstrip magnetic dipoles are employed as the driven elements in the phased array. Meanwhile, coupling patches are embedded between the adjacent driven elements, and coupling energy is transferred between driven elements by the coupling patches. Strong coupling has been constructed between elements as the driven element spacing is only about <inline-formula><tex-math notation="LaTeX">{0}.\text{35}\; {\lambda}</tex-math></inline-formula>. With the influence of adjacent elements, the 3-dB beamwidth (BW) of each active element can reach over <inline-formula><tex-math notation="LaTeX">\pm \text{80}^\circ </tex-math></inline-formula> in the elevation plane. From simulation and measurement, the main lobe scanning ranges of an 8-element and a 16-element phased arrays can both extend over <inline-formula><tex-math notation="LaTeX">\pm \text{80}^\circ </tex-math></inline-formula> in the elevation plane with a gain fluctuation less than 3 dB. Furthermore, in order to keep the SLL low in the scanning, especially at the low elevation angles, genetic algorithm (GA) has been used, and the SLL has been decreased to the value of <inline-formula><tex-math notation="LaTeX">- \text{9}\;\text{dB}</tex-math></inline-formula> in the full scanning range of <inline-formula><tex-math notation="LaTeX">\pm \text{77}^\circ </tex-math></inline-formula> for the eight-element array.