Home // SENSORDEVICES 2022, The Thirteenth International Conference on Sensor Device Technologies and Applications // View article
Authors:
Ronak Sakhiya
Sazzadur Chowdhury
Keywords: Butler matrix; microstrip beamformer; antenna array; beam steering; 3D FEM simulations.
Abstract:
This paper presents the design of a 77 GHz 4 × 4 Butler matrix on a High Purity Fused Silica (HPFS) glass substrate for automotive radar applications. The design and 3D Finite Element Method (FEM) simulation of the 4 × 4 Butler matrix beamformer has been conducted using an industry-standard CAD tool Advanced Design System (ADS) from Keysight™ Technologies. The 4 × 4 Butler matrix having a footprint area of 9.5 mm × 8.3 mm with 0.8-micrometer copper cladding thickness has been designed using a 0.2 mm thick HPFS glass as the microstrip dielectric substrate. The simulated insertion loss is –8 ± 2 dB. The return loss and isolation of the input ports are both below –20 dB respectively. This 4 × 4 Butler matrix can generate beam patterns at an elevation angle of –42˚, –15˚, 0˚, 15˚, and 42˚ when a corresponding port is excited. The maximum and minimum main lobe gain achieved are 20.322 dB and 16.763 dB respectively. These characteristics make the designed Butler matrix suitable for automotive radar applications, such as Adaptive Cruise Control (ACC), Collision Mitigation (CM), blind-spot detection, vehicle tracking, and pre-crash warning system.
Pages: 51 to 56
Copyright: Copyright (c) IARIA, 2022
Publication date: October 16, 2022
Published in: conference
ISSN: 2308-3514
ISBN: 978-1-68558-006-3
Location: Lisbon, Portugal
Dates: from October 16, 2022 to October 20, 2022