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 (L) between two projections of the wall and a predetermined resonator half-width (W), 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 (W), 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 (L) and the resonator half-width (W) 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 (L) between two projections of the wall and a predetermined resonator half-width (W), 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 (W), 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 (L) and the resonator half-width (W) of the resonator . <EOS>