A microstrip antenna comprising several serially connected meandering segments (31, 32, 33, 34, 35) wherein: - each meandering segment (31, 32, 33, 34, 35) comprises at least two parallel adjacent conductive portions serially connected by two successive bends; characterised in that the antenna comprises: - a first meandering segment having bends with angles which differ from 90° by less than 5°; - a second meandering segment serially connected to the first meandering segment and having bends with angles which differ from 90° by more than 5°; - a third meandering segment serially connected to the second meandering segment and having bends with angles which differ from 90° by less than 5°; - a fourth meandering segment serially connected to the third meandering segment and having bends with angles which differ from 90° by more than 5°; and - a fifth meandering segment serially connected to the fourth meandering segment and having bends bends with angles which differ from 90° by less than 5°; wherein: said first meandering segment is connected to an electrical contact, said first, third and fifth meandering segments (31, 33, 35) have substantially parallel edges, and said third meandering segment has a substantially lower width than said first and fifth segments (31,35). - each meandering segment (31, 32, 33, 34, 35) comprises at least two parallel adjacent conductive portions serially connected by two successive bends; characterised in that the antenna comprises: - a first meandering segment having bends with angles which differ from 90° by less than 5°; - a second meandering segment serially connected to the first meandering segment and having bends with angles which differ from 90° by more than 5°; - a third meandering segment serially connected to the second meandering segment and having bends with angles which differ from 90° by less than 5°; - a fourth meandering segment serially connected to the third meandering segment and having bends with angles which differ from 90° by more than 5°; and - a fifth meandering segment serially connected to the fourth meandering segment and having bends bends with angles which differ from 90° by less than 5°; wherein: said first meandering segment is connected to an electrical contact, said first, third and fifth meandering segments (31, 33, 35) have substantially parallel edges, and said third meandering segment has a substantially lower width than said first and fifth segments (31,35). - a first meandering segment having bends with angles which differ from 90° by less than 5°; - a second meandering segment serially connected to the first meandering segment and having bends with angles which differ from 90° by more than 5°; - a third meandering segment serially connected to the second meandering segment and having bends with angles which differ from 90° by less than 5°; - a fourth meandering segment serially connected to the third meandering segment and having bends with angles which differ from 90° by more than 5°; and - a fifth meandering segment serially connected to the fourth meandering segment and having bends bends with angles which differ from 90° by less than 5°; wherein: said first meandering segment is connected to an electrical contact, said first, third and fifth meandering segments (31, 33, 35) have substantially parallel edges, and said third meandering segment has a substantially lower width than said first and fifth segments (31,35). said first meandering segment is connected to an electrical contact, said first, third and fifth meandering segments (31, 33, 35) have substantially parallel edges, and said third meandering segment has a substantially lower width than said first and fifth segments (31,35).