Broadband dual-frequency dual-circularly polarized slot antenna applied to wireless communication system

The invention discloses a broadband dual-frequency dual-circularly polarized slot antenna applied to a wireless communication system, which comprises an upper dielectric substrate and a lower dielectric substrate, a slotted circular patch is arranged on the upper dielectric substrate, a microstrip branch knot is arranged on the lower surface of the upper dielectric substrate, the microstrip branch knot is connected with the slotted circular patch through a copper column, and the lower dielectric substrate is connected with the slotted circular patch through a copper column. The lower layer dielectric substrate is provided with a floor, the floor is provided with an annular groove and an arc groove, the lower surface of the lower layer dielectric substrate is provided with a microstrip feeder, the microstrip feeder is connected with a port, the port is connected with the floor at the starting end of the microstrip feeder, a signal enters from the port, and after the microstrip feeder receives the signal, the s