Scanning antenna and method for manufacturing scanning antenna
US10637156B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | May 19, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1368
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A scanning antenna includes a TFT substrate including a first dielectric substrate, TFTs supported by the first dielectric substrate, gate bus lines, source bus lines, and patch electrodes; a slot substrate including a second dielectric substrate, and a slot electrode formed on a first main surface of the second dielectric substrate; a liquid crystal layer provided between the TFT substrate and the slot substrate; and a reflective conduction plate facing a second main surface of the second dielectric substrate—on a side opposite the first main surface with a dielectric layer therebetween. The slot electrode includes slots disposed corresponding to the patch electrodes, and each of the patch electrodes is connected to the drain of a corresponding TFT. A low-dielectric-loss material layer is formed in the slot, the low-dielectric-loss material layer being made from a material having a smaller dielectric loss with respect to microwaves than that of the liquid crystal material constituting the liquid crystal layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.