4×4 broadband phased array antenna using LHTL based phase shifter

This paper proposes a 4×4 broadband phased array antenna using a Left-Handed Transmission Line (LHTL) based phase shifter. The phased array is constructed with sixteen quasi-Yagi antenna elements and the phase shifters, as well as four power dividers. A key component of the system, the LHTL based phase shifter is able to control a phase delay of incident waves linearly and continuously. The fabricated phased array antenna operate for a frequency range of 800 MHz (1.6 GHz∼2.4 GHz). The beam scanning range of the 4×4 array antenna is ±27° horizontally and vertically while the antenna gain is maintained with a variation of ±1.4 dBi.