Miniaturization Design of Millimeter Wave Conformal Array Antenna

With the rapid development of wireless communication technology, more requirements for miniaturized microstrip antennas have been put forward. In this paper, the input impedance of the last element of the array is designed to match the characteristic impedance of the series-fed antenna array to achieve the effect of traveling wave antenna array. The distance between elements can be adjusted to realize the beam control. A 35GHz series-fed conformal antenna array composed of three microstrip radiation units is designed with this method, which decreases the height of the array by 62%. Thirty-two arrays conformal with a cylinder with a diameter of 70mm of equal distance and a 1 point 32 equal power feed network are designed to feed 3×32 microstrip conformal array antenna. The conformal antenna array can achieve omnidirectional radiation on the plane with the angle of 60° between main lobe and axis of the cylinder. The maximum gain difference of the directional diagram is 1.2dB.