DUAL-BAND ANTENNA Russian patent published in 2017 - IPC H01Q5/20 

FIELD: radio engineering, communication.

SUBSTANCE: device comprises a dielectric housing (DH), the first radiating element (RE) and the second radiating element located on a longitudinal axis oriented vertically. The first RE is installed inside the DH and is made in the form of a spiral from a coiled cylindrical spring. A reflector of the first RE is installed at the bottom of the DH. The device has the first and the second ports, for the first RE and the second RE, respectively, and an impedance transformer (IT). A tube, a section of a coaxial cable (CC), a conducting disk installed at the top of the DH are inserted into the device. The IT is located inside the DH, is connected to the lower end of the spiral of the first RE and is intended to be connected to the first port located outside the reflector. The tube is installed inside the spiral of the first RE, is connected to the reflector and the conducting disk. The CC section is passed through the tube to the outside through the conducting disk and the reflector. The end of the CC section which is passed to the outside through the conducting disk is intended to be connected to the second RE, and the end of the CC section which is passed to the outside through the reflector serves as the second port.

EFFECT: improvement of the isolation between radiating elements, expansion of functionality and bandwidth and provision of the possibility of using any given frequency bands for both bands.

6 cl, 1 dwg