Antenna with monopoly character for several radio services

摘要

Antenna with a monopoly character for at least two radio services, consisting of a monopole element (10) executed along a straight line (11), the monopole element (10) with a flat roof capacity (1), the surface normal (12) of which in the direction of the straight line (11 ) and this is connected to the monopole element (10) and the roof capacity (1) is rotationally symmetrical and consists of surface-like, rotationally symmetrical ring structures (2) which are surrounded by one another and separated by annular gaps (3) and which are oriented concentrically to the straight line (11) , is formed and there are reactance circuits (4) through which the ring structures are connected to each other in a frequency-dependent manner in such a way that for a radio service with the lowest frequency all areal ring structures are effective and for the radio service with the next higher frequency the outermost ring structure (2 ) due to high impedance of the reactance circuits (4) ineffective m and this regularity is continued in the presence of more than two radio services in such a way that the higher the frequency of the radio services, the smaller the dimension of the effective ring structures (2) connected to one another by low-resistance reactance circuits (4), characterized in that several, evenly there are reactance circuits (4) attached to the circumference of the ring structures (2), the parallel electrical effect of which forms a large effective reactance X (f) for the higher frequency ranges, but which is low-resistance for the connection of the next outer ring at the lower frequencies.