An E-band circularly polarized antenna array fed by substrate integrated coaxial line (SICL)

A circularly polarized antenna array for E-band application has been designed, fabricated and measured. The antenna array is fed using substrate integrated coaxial line (SICL) technology, which can be realized by low-cost PCB process in millimeter frequencies. The simulated and measured S11 is below -10dB from 71GHz to 76 GHz. And the simulated and measured results show that both the gain of more than 11dBi and axial ratio of less than 2dB have been achieved over the interested frequency band.