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|Title||Design of a 4x4 Butler Matrix for Vehicle Radar Beamforming Antenna systems at 24 GHz|
|Title in Arabic||تصميم 4 × 4 مصفوفة باتلر لانظمة هوائي رادارات المركبات على تردد 24 جيجا هيرتز|
This work presents a design and simulated results for 4x4 butler matrix with 4 inset fed patch antennas for anti-collision radar at 24GHz. The Butler matrix is used as a beam-forming network that allows producing orthogonal beams that can be steered in different directions. The butler matrix consists of 4 couplers, 2 phase shifters, and 2 crossover couplers. ADS 2011 simulation software has been used in the design of the whole system. Parameters sweep and optimization techniques have been utilized to obtain the best performance. Best results were picked for overall system at 24 GHz, and the results were as follows: the return loss was below -33 dB, the realized antennas gain was 9.6 dBi, and the power radiated was -29.4 dB (1.14 mw),with bandwidth more than 3 GHz. The four azimuth was 86o coverage, the directivity was 11.6194 dBi, the max Power intensity was -27.1 dB, the optimized design size was 16.7 mm x 20.7 mm, the phase shift between all output ports was with 6o error, and the overall insertion loss was -6.7 dB.
|Publisher||الجامعة الإسلامية - غزة|
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