Date of Award

8-29-2018

Degree Type

Thesis

Degree Name

M.A.Sc.

Department

Electrical and Computer Engineering

First Advisor

Chowdhury, Sazzadur

Keywords

Antenna Array, Automotive Radar, Bisbenzocylcobutene, Microfabrication, Synthesized Dielectric

Rights

CC-BY-NC-ND

Abstract

A bisbenzocyclobutene (BCB) based 77 GHz aperture coupled microstrip antenna array for frequency modulated continuous wave (FMCW) automotive radars has been developed for use in automotive collision avoidance and cruise control applications. Each of the microstrip patches of the developed antenna array has been desiged to have a microfbaricated airfilled cavity to realize a synthesized effective dielectric constant of 1.46 in contrast to original BCB dielectric constant of 2.6 to improve the diecrectivity, gain, and bandwidth in a compact footprint suitable for small automotive radars. The developed antenna array has a foot print area of 20 x 21 mm2 to accommodate 56 micorstrip patches in a 7 x 8 matrix configuration. Each of the gold patches has a length of 1.46 mm and a width of 1.7 mm. The anteena array exhibits an ADS™ (Advanced Dsign Systems) 3D simulated -10 dB bandwidth of 4.2 GHz, 22.5 dBi directivity, and a gain of 19.78 dBi with sidelobe levels lower than 13.78 dB to meet the auto industry roadmap reccommendations. A fabrication process table has been developed and simualated successfully using IntelliSuite™, an industry standard software. The developed process table can be used to fabricate the device. The developed antenna array will pave the way to manufacture low cost high performance automotive radars to mitigate fatal crashes to save lives and minimize property and infrastructural damage while also forming an integral part of the adaptive cruise control system for autonomous vehicles.

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