CIRCULAR ANTENNA Russian patent published in 2019 - IPC H01Q1/00 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering, in particular to circular orientation antenna, and can be used in antenna-feeder devices for basic radio station, operator's, dispatching antenna, stationary and for operation as part of receiving-transmitting systems operating at frequencies of 425–445 MHz. Antenna of circular orientation comprises cylindrical housing 1 with cover 12, base 2, high-frequency connector 3, sleeve 4, central conductor 5 installed in high-frequency connector 3, metal rod 6, resonant circuit, inductance coil 12 and bracket 13. Plug with a cable from the receiving-transmitting device is connected to metal rod 6 threaded joint. Antenna is additionally equipped with two spring-loaded metal plates 8 and 9, adjusting screw 7 and insulator 11, on bushing 4 base 2, high-frequency connector 3, the first metal spring plate 8 and bracket 13 are fixed. Metal rod 6 in the lower part is curled into the inductance coil and fixed to central conductor 5, the second metal spring plate 9 is connected to metal rod 6 in the lower part. Resonant circuit is formed by first and second metal spring plates 8, 9 and inductance coil. Plates form together variable capacitance with possibility of adjustment by adjusting screw 7, which is installed in cylindrical housing 1 on outer side.

EFFECT: technical result consists in simplification of design and adjustment of antenna in required frequency range during manufacture, reduction of windage and improvement of stability of main parameters.

1 cl, 5 dwg