2 results about "Surface wave excitation" patented technology

A dual-resonant antenna device is provided, exhibiting improved impedance bandwidth, cross-polarization, and isolation, and is less susceptible to spurious surface wave excitation. More specifically, at least one antenna element and a resonant structure are provided on a non-conductive substrate, such that at least one continuous conductive sidewall of the resonant structure surrounds the one or more antenna elements, forming a resonant cavity filled with a dielectric material covering the one or more antenna elements. Each antenna element is used to excite a TM mode, while the dielectric material and size of the resonant cavity are selected such that the resonant structure is used to excite a TE mode. In a preferred embodiment, the TM mode is a TM 01 mode, and the TE mode is a TE 111 mode.

This invention discloses a surface wave antenna system integrated into a tilted vehicle windshield, comprising a stacked glass substrate, a parallel plate waveguide, a TEM surface wave excitation structure, a TM0 mode conversion and radiation structure, and a TE0 mode excitation and radiation structure. The TEM mode surface wave is shaped and propagated using a gradient-profile parallel plate waveguide, and TM0 mode conversion and leakage radiation are achieved at a single-sided ground interface. Simultaneously, the reverse current coupling between the upper and lower metal conductors excites large-angle TE0 mode surface wave propagation and radiation in the azimuth plane. This invention achieves wide-angle radiation coverage in both the elevation and azimuth planes, and requires no interconnecting vias, making it suitable for integration into vehicle windshields and application in high-frequency communication scenarios such as V2X.