Patent EA-004526-B1 (EA)
Title: Radio antenna in the form of a transmitting antenna or a receiving antenna and radio mobile system
Inventor: REICHELT HELMUT
IPC: H01Q9/40
Filed: 2001-09-06
Abstract: 1. Radio antenna as a transmitting antenna or as a receiving antenna, especially for a mobile radio system (MFS), with the radio antenna (MS-A, BTS-A) 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, characterized in that the radio antenna (MS-A, BTS-A) is a planar antenna and consists of one carrier part (1), of a coating (2) applied thereon and of two coating feeders (3, 4), the carrier part (1) consists of an electrically isolating material, the coating (2) is made of a coating material of the following composition: a). 48% to 65% amount of substance of a basic substance comprising - 36% to 46% amount of substance binding agent, - 12% to 22% amount of substance insulator, - 12% to 24% amount of substance dispersing agent, - 8% to 40% amount of substance distilled water, and b). 35% to 52% amount of substance graphite, the composition of the binding agent being: - 64% to 79% amount of substance distilled water, - 4% to 6% amount of substance sulfonated oil, - 0.16% to 0.24% amount of substance phenols or 0.05% to 0.5% amount of substance benzisothiazolinone, - 17% to 22% amount of substance casein, - 0.8% to 1.2% amount of substance urea, - 2% to 6% amount of substance alkaline thinning agent, and - 2.3% to 2.8% amount of substance caprolactam and that the coating feeders (3, 4) are at least two spaced electrical conductors made of an electrically well-conducting material and which have an electrical connection to the interfacial coating (2), and that the coating feeders (3, 4) are 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. 2. Radio antenna according to Claim 1, characterized in that the carrier part (1) is made of sturdy plastic. 3. Radio antenna according to Claim 1 or 2, characterized in that the carrier part (1) is designed in plate shape and thus the radio antenna (MS-A, BTS A) is formed as a planar antenna and that a coating (2) with allocated coating feeders (3, 4) is applied on one and/or on both surface sides. 4. Radio antenna according to any one of the Claims 1 to 3, characterized in that the carrier part (1) is an integrated component of one part of a housing outer wall, especially of a mobile station housing (cellular phone housing) made of plastic. 5. Radio antenna according to any one of the Claims 1 to 4, characterized in that the sulfonated oil is preferably sulfated ricinus oil. 6. Radio antenna according to any one of the Claims 1 to 5, characterized in that the phenols are carbonized phenols produced by cracking or that preferably benzisothiazolinone is used. 7. Radio antenna according to any one of the Claims 1 to 6, characterized in that the thinning agent is a solvent based on aromatics and/or alcohol and/or ester and/or ketone. 8. Radio antenna according to any one of the Claims 1 to 7, characterized in that the insulator is insulating soot. 9. Radio antenna according to any one of the Claims 1 to 8, characterized in that the dispersing agent is an inorganic and/or organic, monomer and/or polymer substance. 10. Radio antenna according to any one of the Claims 1 to 9, characterized in that the coating material contains a thixotropic agent. 11. Radio antenna according to any one of the Claims 1 to 10, characterized in that the coating feeders are parallel aligned copper foil strips (3, 4) and that the coating (2) contacts under or over the copper foil strips (3,4) or that they are embedded in the coating. 12. Radio antenna according to any one of the Claims 1 to 11, characterized in that a protective layer is applied above the coating (2) and/or the coating feeders (3, 4). 13. A mobile radio system, comprising: - mobile stations (MS) as cellular phones for subscribers, - base transceiver stations (BTS) in one area each as a radio cell (FZ) which each handles the radio communication traffic with the mobile stations (MS), - with base station controllers (BSC) which are allocated each to several base transceiver stations (BTS) and are connected with them via data transfer and which control and coordinate the allocated base transceiver stations (BTS), and - with mobile switching centers (MSC) which are connected each with several base station controllers (BSC) via data transfer and which manage them, characterized in that a radio antenna (MS-A, BTS-A) is used in at least one mobile station (MS), and/or in one base station (BS), and/or in one base station controller (BSC), and/or according to any one of the Claims 1 to 12 one base transceiver station (BTS) and/or in at least one mobile switching center (MSC) according to any one of the Claims 1 to 12.