Low-Profile 77-GHz Lens Antenna With Array Feeder

Abstract

A 77-GHz lens antenna for automotive radar applications is presented. It consists of a feeder in the form of a 2 2 patch array etched from a single layer on a 100-m-thick substrate and a commercially available dielectric lens. Compared to previously published lens antennas, the presented design has the advantages of excellent electrical performance and a low profile in combination with a thin lens. Measurements of port impedance match and radiation patterns are presented. Beam tilt by lateral offset of the lens is demonstrated experimentally.

Novel Phaseless Gain Characterization for Circularly Polarized Antennas at mm-Wave and THz Frequencies

“…e prop and d c are same as in (1). Dividing (1) by (2) eliminates the unknown e prop and the variables d c and λ, giving…”

“…R ECENTLY, there is increased interest in mm-wave and THz systems due to their growing applications in communication, imaging, and vehicular radar [1]- [4]. These systems rely on high-gain antenna arrays due to the limited output power at mm-wave and terahertz frequencies [5]- [10].…”

Millimeter Wave Antenna for Intelligent Transportation Systems Application

“…A 77 GHz multi-channel directional folded dipole radar antenna having gain of 8.2dBi is discussed in [15]. A 77 GHz lens antenna for automotive radar having bandwidth of 4GHz is proposed in [16]. A 77 GHz millimeter wave technology for automotive radar sensors having bandwidth of 4 GHz and half power beam width gain of 5 dBi is discussed in [17].…”

Design of 77 GHz half‐shorted horn antenna with metamaterial lens

“…For patch antennas, they have some drawbacks, such as narrow band and low gain . Among lens antennas, convex and spherical lens antennas are mostly used in radar systems for their good performance of gain, but they are usually thick, heavy, and high cost and they also need some patch feeders which would increase complexity and impracticability in radar systems . As for horn antenna, it is the most common antenna applied in radar systems because of its high performance.…”

“…1 Among lens antennas, convex and spherical lens antennas are mostly used in radar systems for their good performance of gain, but they are usually thick, heavy, and high cost and they also need some patch feeders which would increase complexity and impracticability in radar systems. 2,3 As for horn antenna, it is the most common antenna applied in radar systems because of its high performance. But the gain of horn antennas is inherently correlated to their physical dimensions; therefore, the horn antennas with high gain are usually bulky.…”