A microwave component (2; 102; 202) of the transmission line type integrated into the substrate, comprising a propagation area extending along a propagation axis (X-X) and being delimited transversely, with respect to the propagation axis (X-X), by at least one electrically-conductive wall (25; 23, 26), the propagation area being configured to have, at a predetermined reference temperature, a corresponding predetermined frequency response, the propagation area comprising a plurality of resonators, each resonator having, at the reference temperature, a resonator length between two projections of the wall (25, 23, 26) and a predetermined resonator half-width, at least one compensation block arranged in the propagation area, the at least one compensation block being made of a dielectric material having a dielectric permittivity whose derivative with respect to temperature, in a predetermined range of interest of temperature around the reference temperature, has a sign opposite to the sign of at least one coefficient of thermal expansion of the propagation area, the dimensions of the at least one compensation block, in particular a block width (w 1), at the reference temperature, being selected so that the at least one compensation block is able to compensate for a variation in the frequency response with the temperature, in the temperature range of interest, characterised in that the propagation area also includes a dielectric material distinct from the material in which the at least one compensation block is made, or a gas or vacuum, with a half-width referred to as the half-distance (w 0), the sum of the block width (w 1) and of the half-distance (w 0) being equal to the resonator half-width, at least one compensation block being arranged in each resonator, the dimensions of each compensation block, in particular the block width (w 1), depending on the resonator length and the resonator half-width of the resonator. the propagation area being configured to have, at a predetermined reference temperature, a corresponding predetermined frequency response, the propagation area comprising a plurality of resonators, each resonator having, at the reference temperature, a resonator length between two projections of the wall (25, 23, 26) and a predetermined resonator half-width, at least one compensation block arranged in the propagation area, the at least one compensation block being made of a dielectric material having a dielectric permittivity whose derivative with respect to temperature, in a predetermined range of interest of temperature around the reference temperature, has a sign opposite to the sign of at least one coefficient of thermal expansion of the propagation area, the dimensions of the at least one compensation block, in particular a block width (w 1), at the reference temperature, being selected so that the at least one compensation block is able to compensate for a variation in the frequency response with the temperature, in the temperature range of interest, characterised in that the propagation area also includes a dielectric material distinct from the material in which the at least one compensation block is made, or a gas or vacuum, with a half-width referred to as the half-distance (w 0), the sum of the block width (w 1) and of the half-distance (w 0) being equal to the resonator half-width, at least one compensation block being arranged in each resonator, the dimensions of each compensation block, in particular the block width (w 1), depending on the resonator length and the resonator half-width of the resonator.