NONPROTRUDING RING SLOT ANTENNA Russian patent published in 1997 - IPC

FIELD: antenna equipment; may be used as receiving and transmitting conformable antenna. SUBSTANCE: antenna comprises metal body in the form of inverted truncated cone with flange for antenna attachment closed by dielectric cover lying on flange. Internal space of body houses two plates. Upper plate made from metal has maximum diameter smaller than antenna body in the same section. It is placed without clearance under dielectric cover and is made in the form of disc with four protruding open stubs and four stubs connected to it from lower side and closed to antenna body. Stubs are spaced by 90 deg relative to one another and each group of stubs is displaced with reference to other group through 45 deg. Lower plate is made of dielectric with one-side metallization oriented upwards in the form of octahedron which maximum dimension is smaller than diameter of upper plate. It has four stubs placed above short-circuited stubs of upper plate and electrically connected to them. Power supply line which is continuation of central conductor of high-frequency connector located outside of antenna body in center of its base is connected to geometrical center of metallization of lower plate. Dielectric cover, both plates and antenna body form a system of two coupled resonators capable of provision of expansion of operational band of antenna for 25-27%. EFFECT: broadened operational band. 2 dwg