The present invention relates to liquid-crystalline media comprising one or more pleochroic dyes and one or more compounds selected from the group of compounds of formulae I, II and III, ##STR00001##
in which the parameters have the meaning indicated in Claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

A liquid crystal panel included in a scanning antenna includes: a TFT substrate including a first dielectric substrate, a TFT supported by the first dielectric substrate, a gate bus line, a source bus line, a patch electrode, and a first alignment film covering the patch electrode; a slot substrate including a second dielectric substrate, a slot electrode formed on a first main surface of the second dielectric substrate and including a slot disposed corresponding to the patch electrode, and a second alignment film covering the slot electrode; and a liquid crystal layer provided between the TFT substrate and the slot substrate and containing a liquid crystal molecule including an isothiocyanate group. The first alignment film and the second alignment film are each independently formed of a polyimide-based alignment film material. In each of the first alignment film and the second alignment film, a density of a carboxyl group on a film surface in contact with the liquid crystal layer is less than a density of a carboxyl group inside a film.

The invention relates to a liquid crystalline medium, characterised in that it comprises one or more compounds of formula A

##STR00001##

and
one or more compounds of formula II

##STR00002##

wherein the parameters have the meaning indicated in claim 1, and to high-frequency components comprising the same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular microwave phased-array antennas.

The present invention relates to liquid crystal mixtures comprising one or more compounds of the formula A

##STR00001##

and, in addition one or more compounds of formula I

##STR00002##

or one or more compounds of formula II

##STR00003##

wherein the individual radicals have the respective meanings indicated in claim 1, to the use thereof for high-frequency components, and to high-frequency components, in particular antennae, especially for the gigahertz range, comprising these media.

A liquid crystal polymer composite is disclosed herein. The liquid crystal polymer composite includes a solvent, a soluble liquid crystal polymer, and an additive. The soluble liquid crystal polymer is dissolved in the solvent. The additive includes an organic polymer or inorganic filler, while the additive is dispersed or dissolved in the solvent.

A liquid crystal medium comprising a) one or more compounds of formula I and one or more compounds of the formula T and one or more compounds of the formula S1

##STR00001##

and an electronic component comprising said LC medium, operable in the visible (VIS), infrared (IR) or microwave region of the electromagnetic spectrum. Also, the use of said LC medium in the IR, VIS or microwave region and to devices comprising said electronic component.

Compounds of formula I ##STR00001##
their use in liquid-crystalline media, for example, for the phase shifting of microwaves for tunable phased-array antennae, and their use for high-frequency components, in particular antennae, especially for the gigahertz range.

A liquid-crystalline media comprising one or more compounds of formula S

##STR00001## where the parameters have the meaning defined in claim 1, and one or more compounds of the formula I and one or more compounds of the formula II or one or more compounds of the formula I and one or more compounds of the formula III or one or more compounds of the formula II and one or more compounds of the formula III or one or more compounds of the formula I and one or more compounds of the formula II and one or more compounds of the formula III:

##STR00002##

in which the parameters have the meaning indicated in claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

A compound capable of providing a liquid crystal composition with high T.sub.ni, large ?n, low V.sub.th, large ??.sub.r, small tan ?.sub.iso, and satisfactory storability at low temperatures, and a liquid crystal composition, as well as a liquid crystal display element, a sensor, a liquid crystal lens, an optical communication device, and an antenna using the liquid crystal composition. Specifically, a compound represented by general formula (i) having an alkynyl group and an isothiocyanate group (NCS) and a liquid crystal composition containing one or two or more of such compounds.

The present disclosure provides a high-frequency composite substrate which includes a metal layer and an insulating structure. The insulating structure includes at least one liquid crystal polymer (LCP) layer with dielectric constant ranged from about 2 to about 4. The liquid crystal polymer layer adheres to the metal layer. The high-frequency composite substrate may reduce the adverse effects caused by the Resistor-Capacitor delay (RC delay).