An antenna module (2A, 2B, 2C), comprising - a dielectric piece, which has at least one planar first surface - two monopole-type elements (7, 8) configured to radiate with their natural frequencies on separate functional bands and comprising supply points (3, 3a, 4) located on a second surface of the dielectric piece, which is substantially parallel to the first surface - a parasite element on at least one surface of the dielectric piece comprising a first branch and a second branch, which parasite element forms an angle in relation to the first and second surface - a coil connected to a lower frequency range monopole type radiator - the antenna module (2A, 2B, 2C) is configured to provide - on a lower functional band - a first resonance location (21, 31) of the lower functional band provided by the first branch of the parasite element in order to widen the lower functional band, and - a second resonance (23, 33) provided by the lower frequency range monopole type radiator and the coil - on an upper functional band - a first resonance location (22, 32) of the higher frequency band provided by a second branch of the parasite element in order to widen the upper functional band, and - a second resonance location (24, 34) in the upper functional band provided by a high frequency monopole type radiator characterised in that the first branch and the second branch of the parasite element are together U-shaped, the bottom part of which U is situated at the end side of the antenna module (2A, 2B, 2C) and the adjacent sides thereof are situated at two mutually opposite sides (2b, 2c) of the antenna module (2A, 2B, 2C). - a dielectric piece, which has at least one planar first surface - two monopole-type elements (7, 8) configured to radiate with their natural frequencies on separate functional bands and comprising supply points (3, 3a, 4) located on a second surface of the dielectric piece, which is substantially parallel to the first surface - a parasite element on at least one surface of the dielectric piece comprising a first branch and a second branch, which parasite element forms an angle in relation to the first and second surface - a coil connected to a lower frequency range monopole type radiator - the antenna module (2A, 2B, 2C) is configured to provide - on a lower functional band - a first resonance location (21, 31) of the lower functional band provided by the first branch of the parasite element in order to widen the lower functional band, and - a second resonance (23, 33) provided by the lower frequency range monopole type radiator and the coil - on an upper functional band - a first resonance location (22, 32) of the higher frequency band provided by a second branch of the parasite element in order to widen the upper functional band, and - a second resonance location (24, 34) in the upper functional band provided by a high frequency monopole type radiator - on a lower functional band - a first resonance location (21, 31) of the lower functional band provided by the first branch of the parasite element in order to widen the lower functional band, and - a second resonance (23, 33) provided by the lower frequency range monopole type radiator and the coil - a first resonance location (21, 31) of the lower functional band provided by the first branch of the parasite element in order to widen the lower functional band, and - a second resonance (23, 33) provided by the lower frequency range monopole type radiator and the coil - on an upper functional band - a first resonance location (22, 32) of the higher frequency band provided by a second branch of the parasite element in order to widen the upper functional band, and - a second resonance location (24, 34) in the upper functional band provided by a high frequency monopole type radiator - a first resonance location (22, 32) of the higher frequency band provided by a second branch of the parasite element in order to widen the upper functional band, and - a second resonance location (24, 34) in the upper functional band provided by a high frequency monopole type radiator