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Design of 880MHz Dual Circular Polarization and 2.4GHz Circular Polarization Integrated Antenna

In this paper, a dual circularly polarized IFA antenna array and a circularly polarized microstrip antenna are introduced. The IFA array is composed of four designed Inverted-F shape antennas. The response frequency range of the IFA array is 840MHz-925MHz, which can be applied to RFID applications in UHF band. The two feeding ports correspond to two states of left-handed circular polarization and right-handed circular polarization respectively. The circularly polarized microstrip antenna is located in the middle of the antenna, and the response frequency range is 2.4-2.45ghz, which can be used to design multi-functional applications.