Low-Cost Wideband Tilted Beam Antenna for Millimeter-wave Vehicle Applications

TL;DR

This paper introduces a low-cost, wideband tilted-beam antenna for millimeter-wave vehicle applications, combining a novel slot-monopole design that offers high gain, broad bandwidth, and robustness against substrate losses.

Contribution

A novel slot-monopole antenna design that enhances bandwidth and reduces cost for millimeter-wave vehicle communication systems.

Findings

Achieves over 76.5% impedance bandwidth (20-44.78 GHz)

Provides a peak realized gain of 6.1 dBi

Demonstrates robustness against substrate losses

Abstract

To facilitate vehicle coverage for millimeter-wave applications, this communication presents a low-cost, wideband tilted-beam antenna. A novel design is proposed in which a slot antenna is both directly excited and electromagnetically coupled to a monopole array. This slot-monopole configuration is inherently robust against substrate losses, enabling low-cost fabrication while maintaining high realized gain and compact size. Furthermore, the slot-fed structure effectively excites multiple resonant modes within the monopole array, resulting in a significantly enhanced bandwidth. Experimental results demonstrate that the antenna achieves a -10-dB impedance bandwidth of over 76.5% (20-44.78 GHz) and a peak realized gain of 6.1 dBi.