Components for high-frequency technology, and liquid-crystalline media

Component which operates in the microwave range or millimeter wave range of the electromagnetic spectrum, wherein the component is selected from the group consisting of the following components:

• wireless and radiowave antenna arrays;
• microwave antenna arrays;
• and devices selected from the group consisting of the following devices:
• phase shifters;
• varactors;
• and matching circuit adaptive filters;
• and wherein the component comprises a liquid-crystal medium, wherein the medium comprises two or more compounds of the formula I, wherein the concentration of all of the compounds of formula I is 30 to 95% by weight, based on the total weight of the medium,
• in which
• R11 and R12, independently of one another, denote unfluorinated alkyl having 1 to 15 C atoms, or unfluorinated alkenyl having 2 to 15 C atoms,
• R13 denotes ethyl or cycloalkyl having 3 to 6 carbon atoms,
• provided that:
• the liquid-crystal medium contains one or more compounds of the formula I-2
• and contains one or more compounds of the formula I-3
• wherein A1 denotes cycloalkyl having 3 to 6 C atoms;
• and
• wherein the liquid-crystal medium additionally comprises one or more components selected from the group of the following components, components B and D to E,
• a strongly dielectrically positive component, component B, which has a dielectric anisotropy of 10 or more,
• a component, component D, which has a dielectric anisotropy in the range from more than −5.0 to less than 10.0 and comprises one or more compounds of the following formula IV:
• in which
• R41 and R42, independently of one another, denote unfluorinated alkyl or unfluorinated alkoxy, each having 1 to 15 C atoms, or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl, each having 2 to 15 C atoms, or cycloalkyl, alkylcycloalkyl, cycloalkenyl, alkylcycloalkenyl, alkylcycloalkylalkyl or alkylcycloalkenylalkyl, each having up to 15 C atoms,
• L41 to L44 on each appearance, in each case independently of one another, denote H, alkyl having 1 to 5 C atoms, F or Cl, provided that at least two of the substituents L41 to L44 are not H, and
• P denotes an integer in the range from 7 to 14;
• and
• a component, component E, which has a dielectric anisotropy in the range from more than −5.0 to less than 10.0 and comprises one or more compounds of the formulae V to IX:
• in which
• L51 denotes R51 or X51,
• L52 denotes R52 or X52,
• R51 and R52, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X51 and X52, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated or fluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms, and
• independently of one another, denote
• L61 denotes R21 and, in the case where Z61 and/or Z62 denote trans-CH═CH— or trans-CF═CF—, alternatively denotes X21,
• L62 denotes R62 and, in the case where Z61 and/or Z62 denote trans-CH═CH— or trans-CF═CF—, alternatively denotes X62,
• R61 and R62, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X61 and X62, independently of one another, denote F or Cl, —CN, —NCS, —SF5, fluorinated alkyl or alkoxy having 1 to 7 C atoms or fluorinated alkenyl, alkenyloxy or alkoxyalkyl having 2 to 7 C atoms,
• one of
• Z61 and Z62 denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other, independently thereof, denotes trans-CH═CH—, trans-CF═CF— or a single bond, and
• independently of one another, denote
• L71 denotes R71 or X71,
• L72 denotes R72 or X72,
• R71 and R72, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X71 and X72, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated or fluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms, and
• Z71 to Z73, independently of one another, denote trans-CH═CH—, trans-CF═CF—, —C≡C— or a single bond, and
• independently of one another, denote
• R81and R82, independently of one another, denote H, unfluorinated alkyl or alkoxy having 1 to 15 C atoms or unfluorinated alkenyl, alkenyloxy or alkoxyalkyl having 2 to 15 C atoms,
• one of Z81and Z82 denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other, independently thereof, denotes trans-CH═CH—, trans-CF═CF— or a single bond, and
• independently of one another, denote
• L91 denotes R91 or X91,
• L92 denotes R92 or X92,
• R91 and R92, independently of one another, denote H, unfluorinated alkyl or alkoxy having 1 to 15 C atoms or unfluorinated alkenyl, alkenyloxy or alkoxyalkyl having 2 to 15 C atoms,
• X91 and X92, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated or fluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms, and
• Z91 to Z93, independently of one another, denote trans-CH═CH—, trans-CF═CF—, —C≡C— or a single bond,
• independently of one another, denote
• and where compounds of the formula IIIA
• where R31 and R32 denote unfluorinated alkyl or unfluorinated alkoxy, each having 1 to 15 C atoms, or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl, each having 2 to 15 C atoms, are excluded from the compounds of the formula VI.