A Semi-Substrate-Integrated Coaxial Line Transverse Slot Array Antenna

This paper proposes a standing-wave excited slot antenna using a novel semi-substrate-integrated coaxial line (Semi-SICL) technology. The performance of linear array synthesis is evaluated by designing a four-slot array with equal spacing. The proposed transverse slot antenna has a compact length of 0.27 guided wavelength (λg) transverse slots to reduce the transverse size of the antenna. The -10 dB impedance bandwidth is 27.86-28.16 GHz with a peak gain of 11.37 dBi observed.