Patent ID: 6836251
Filing Date: 2004-12-28
Classification: H01Q

Abstract:
Radio antenna as a transmitting antenna or as a receiving antenna, especially for a mobile radio system (with the radio antenna) being connectable to a transmission unit or to a reception unit and as a broadband antenna thus being a component part of a frequency-selective electromagnetic oscillating circuit operating on a correspondingly current radio frequency, comprising:1) a planar radio antenna (MS-A, BTS-A) that comprises a carrier part (1), a coating (2) applied thereon and two coating feeders (3, 4), 2) the carrier part (1) comprising an electrically isolating material, 3) the coating (2) comprising a coating material which comprises: a) 48% to 65% by weight of an amount of substance of a basic substance comprising by weight: i) 36% to 46% amount of substance binding agent, ii) 12% to 22% amount of substance insulator, iii) 12% to 24% amount of substance dispersing agent, iv) 8% to 40% amount of substance distilled water, and b) 35% to 52% amount of substance graphite, the composition of the binding agent being i) 64% to 79% amount of substance distilled water, ii) 4% to 6% amount of substance sulfonated oil, iii) 0.16% to 0.24% amount of substance phenols or 0.05% to 0.5% amount of substance benzisothiazolinone, iv) 17% to 22% amount of substance casein, v) 0.8% to 1.2% amount of substance urea, vi) 2% to 6% amount of substance alkaline thinning agent, and vii) 2.3% to 2.8% amount of substance caprolactam, said coating feeders (3, 4) comprising at least two spaced electrical conductors made of an electrically highly conductive material sandwhich having an electrical connection to the interfacial coating (s), and said coating feeders (3, 4) being combinable with additional elements of the electromagnetic oscillating circuit (5, 6), with electromagnetic waves being transmittable or receivable by means of the coating (2) via its planar extension.