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AssigneeNokia Mobile Phones Ltd.
InventorsAri Vaisanen, Veijo Haapanen, Timo Kettunen
Estimating the term…
An antenna structure which comprises at least one active and at least one parasitic antenna conductor and which is arranged to be fitted on top of a planar electroconductive surface at a distance from said surface which is arranged to be used as a ground plane for said antenna structure, and which antenna structure comprises, arranged parallelly at a distance from each other, a first antenna conductor and a second antenna conductor which have an electrical length of approximately ¼ of the wavelength of the used frequency and which are parallel with said ground plane, and which comprise opposite first ends and opposite free second ends, wherein the antenna structure is equipped with symmetrical conductors for short-circuiting the first ends to said ground plane and a first conductor for coupling the supply to a desired point between the first end and a second end of the active antenna conductor. The antenna structure is symmetrically equipped with also a second conductor for coupling a short circuit to the corresponding point between the first end and the second end of the parasitic antenna conductor in such a way that in the rotated position of 180° of the antenna structure, the second conductor is, in turn, used as said supply and the first conductor is, in turn, used as said short circuit.
An antenna structure, comprising at least one active and at least one parasitic antenna conductor and arranged to be fitted on top of a planar electroconductive surface at a distance from said surface which is arranged to operate as a ground plane for said antenna structure, and which antenna structure comprises, arranged parallelly at a distance from each other, a first antenna conductor and a second antenna conductor which have an electrical length of approximately ¼ of the wavelength of the used frequency and which are substantially parallel with said ground plane, and which comprise opposite first ends and opposite free second ends, wherein the antenna structure is further equipped with symmetrical conductors for short-circuiting the first ends to said ground plane and a first conductor for coupling the supply to a desired point between the first end and a second end of the active antenna conductor, wherein the antenna structure is symmetrically equipped with also a second conductor for coupling a short circuit to the corresponding point between the first end and the second end of the parasitic antenna conductor in such a way that in the rotated position of 180° of the antenna structure, the second conductor is, in turn, used as said supply and the first conductor is, in turn, used as said short circuit.
A longitudinal expansion card, comprising a card part which is arranged to be inserted preferably completely in the expansion card connection of an electronic device, a housing part to be fixed at a distance from said card part, which is at least partly arranged to extend outside said connection, a circuit board fitted inside said card part and said housing part, and an antenna structure which comprises at least one active and at least one parasitic antenna conductor and which is arranged to be fitted on top of a planar electroconductive surface, at a distance from said surface, which is arranged to be used as the ground plane of said antenna structure, and which antenna structure comprises, fitted substantially parallelly at a distance from each other, a first antenna conductor and a second antenna conductor, which have an electrical length of approximately ¼ of the wavelength of the used frequency and which are parallel with said ground plane, and which comprise opposite first ends and opposite free second ends, wherein the antenna structure is further equipped with symmetrical conductors for short-circuiting the first ends to said ground plane and a first conductor for coupling the supply to a desired point between the first end and a second end of the active antenna conductor, wherein the antenna structure is symmetrically equipped with also a second conductor for coupling a short circuit to the corresponding point between the first end and the second end of the parasitic antenna conductor in such a way that in the rotated position of 180° of the antenna structure, the second conductor is, in turn, used as said supply and the first conductor is, in turn, used as said short circuit.
A method in the manufacture of an antenna structure which comprises at least one active and at least one parasitic antenna conductor and which is arranged to be fitted on top of a planar electroconductive surface at a distance from said surface which is arranged to operate as a ground plane for said antenna structure, and which antenna structure comprises, arranged substantially parallelly at a distance from each other, a first antenna conductor and a second antenna conductor which have an electrical length of approximately ¼ of the wavelength of the used frequency and which are parallel with said ground plane, and which comprise opposite first ends and opposite free second ends, wherein equipping the antenna structure further with symmetrical conductors for short-circuiting the first ends to said ground plane and a first conductor for coupling the supply to a desired point between the first end and a second end of the active antenna conductor, equipping the antenna structure symmetrically with also a second conductor for coupling a short circuit to the corresponding point between the first end and the second end of the parasitic antenna conductor in such a way that in the rotated position of 180° of the antenna structure, the second conductor is, in turn, used as said supply and the first conductor is, in turn, used as said short circuit.
Dependencies are inferred from the claim text.