COMPACT MULTI-RANGE CIRCULARLY POLARIZED MICROSTRIP ANTENNA (VERSIONS) Russian patent published in 2020 - IPC H01Q1/38 

FIELD: navigation.

SUBSTANCE: invention relates to antenna-feeder devices for on-board and ground-based satellite navigation equipment. Two-layer circularly polarized microstrip antenna in which values of relative dielectric permittivity of substrates are selected from the following conditions: first tier – ε_bot from 4.55 to 5, second tier – ε_top from 2.8 to 3.2. Emitting metal plates have thicknesses much less than height of dielectric substrates and recessed into dielectric substrates, and shape of radiating metal plates is square, with square cutouts arranged along diagonal. Three-level circular polarization microstrip antenna in which the exciting coaxial waveguide passes perpendicular to the screen through the center of the first and second tiers, external sheath of which has galvanic connection with radiating plates of the first two tiers, and internal conductor is galvanically connected to the third radiating plate. Relative permittivity of the substrates are selected from the following conditions: the first tier – ε_bot from 4.55 to 5, the second tier – ε_med from 2.8 to 3.2, the third tier – ε_top from 4.55 to 5. Emitting metal plates have thicknesses much smaller than the height of the dielectric substrate of the third tier and are recessed into it, and the shape of the radiating metal plates is square, with square cutouts arranged diagonally.

EFFECT: achieving optimum value of ellipticity coefficient in direction of maximum beam pattern in wide band of working frequencies at low weight and size characteristics and high structural strength of antennae under action of external factors.

2 cl, 15 dwg