A multi-band antenna (500; 510; 520), comprising: a first conductive element (101; 501; 511a; 521; 541) having a central axis, a predetermined cross-sectional shape, and a predetermined first length; a second conductive element (103; 502; 512a; 522; 542) having a central axis, a predetermined cross-sectional shape and a predetermined second length, the predetermined second length being less than the predetermined first length, the second conductive element being hollow, the predetermined cross-sectional shape of the second conductive element (103; 502; 512a; 522; 542) sized to allow the second conductive element to fit over the first conductive element (101; 501; 511a; 521; 541) without contact between the first conductive element and the second conductive element, the second conductive element (103; 502; 512a; 522; 542) aligned over the first conductive element (101; 501; 511a; 521; 541) such that the central axis of the first conductive element coincides with the central axis of the second conductive element and such that a first end of the first conductive element (101; 501; 511a; 521; 541) is in the same plane as a first end of the second conductive element (103; 502; 512a; 522; 542); and a first conductive member (203, 204) coupled to the first end of the first conductive element (101; 501; 511a; 521; 541) and to the first end of the second conductive element (103; 502; 512a; 522; 542); characterized in that: either the first conductive element is a rod having a central axis with a circular shape and the second conductive element is a rod having a central axis with a circular shape; or the first conductive element is a rod having a central axis with a spiral shape and the second conductive element is a rod having a central axis with a spiral shape. a first conductive element (101; 501; 511a; 521; 541) having a central axis, a predetermined cross-sectional shape, and a predetermined first length; a second conductive element (103; 502; 512a; 522; 542) having a central axis, a predetermined cross-sectional shape and a predetermined second length, the predetermined second length being less than the predetermined first length, the second conductive element being hollow, the predetermined cross-sectional shape of the second conductive element (103; 502; 512a; 522; 542) sized to allow the second conductive element to fit over the first conductive element (101; 501; 511a; 521; 541) without contact between the first conductive element and the second conductive element, the second conductive element (103; 502; 512a; 522; 542) aligned over the first conductive element (101; 501; 511a; 521; 541) such that the central axis of the first conductive element coincides with the central axis of the second conductive element and such that a first end of the first conductive element (101; 501; 511a; 521; 541) is in the same plane as a first end of the second conductive element (103; 502; 512a; 522; 542); and a first conductive member (203, 204) coupled to the first end of the first conductive element (101; 501; 511a; 521; 541) and to the first end of the second conductive element (103; 502; 512a; 522; 542); characterized in that: either the first conductive element is a rod having a central axis with a circular shape and the second conductive element is a rod having a central axis with a circular shape; or the first conductive element is a rod having a central axis with a spiral shape and the second conductive element is a rod having a central axis with a spiral shape. either the first conductive element is a rod having a central axis with a circular shape and the second conductive element is a rod having a central axis with a circular shape; or the first conductive element is a rod having a central axis with a spiral shape and the second conductive element is a rod having a central axis with a spiral shape.