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Multiple-Input Multiple-Output (MIMO) radars can improve the angular resolution of automotive radar sensors. In MIMO radars, a critical design parameter is finding the optimal placement of the transmitting and receiving arrays. Indeed, the physical position of the transceivers affects directly the properties of the virtual array. Unfortunately, the inverse mapping from the virtual array to the real...
Multiple-input–multiple-output (MIMO) radars show improved angular resolution compared to traditional phased-array radar systems. Exploiting the advantages of MIMO radars could thus significantly improve the performances of the next generation of automotive radar sensors. The placement and the characteristics of the antenna arrays affect the performance of the MIMO system. For such applications, different...
The investigation of low radar cross-section (RCS) structures is of great practical interest for the car integration of radar systems. This paper presents for the first time the study of a low-RCS surface at millimeter wave frequencies. The surface employs a chessboard-like geometry that uses a periodic displacement of artificial magnetic conductors (AMCs) and perfect electric conductors (PECs). The...
Vivaldi antennas are excellent radiating elements that provide high gain and wide bandwidth. However, due to their end-fire radiation pattern they are not suited for the integration in printed circuit board (PCB) technology, if a broadside radiation is required. This paper presents a modified Vivaldi antenna loaded with a periodic arrangement of metallic strips that allows to achieve a broadside radiation...
In this paper the design and the implementation of a cavity antenna array in PCB technology for automotive radar applications is presented. The array consists of four cavity antennas fed by a microstrip-line feeding network and H-shaped coupling apertures in the ground plane. Simulation and measurement results show that the proposed structure is a suitable candidate for the integration in automotive...
A wideband miniaturized Bowtie antenna is recommended for medical imaging using microwave tomography. The structure of the proposed antenna is introduced and explained and the performance of the antenna is evaluated using both simulations and measurements. An array of the antenna is built and a simulation is performed to evaluate the performance of the array when it surrounds a human head model. Two...
This paper presents a novel Radio Frequency Identification (RFID) reader antenna guaranteeing an almost omnidirectional irradiation and a circular polarization. More specifically, the antenna here presented consists of four patch antennas placed on the lateral faces of a cardboard cube. This way, a high performance antenna with a very low environmental impact is obtained. Numerical and experimental...
This paper presents a novel Radio Frequency Identification (RFID) reader antenna guaranteeing an almost omnidirectional irradiation and a circular polarization. More specifically, the antenna here presented consists of four patch antennas placed on the lateral faces of a cardboard cube. This way, a high performance antenna with a very low environmental impact is obtained. Numerical and experimental...
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