Abstract
In this paper, we presents a 4×4 stacked phased array antenna system operating at 15GHz, which can be used for commercial as well as military applications including low earth orbiting (LEO) satellites communications and airborne defense system. The phased array antenna consists of 4 subarrays having 4 tapered slot antennas, phase shifters, power dividers, and high voltage controllers. Each component is constructed on low temperature co-fired ceramics (LTCC) that is a multilayer electronic packaging technology and has a unique ability to integrate passive components such as resistors, capacitors and inductors in to a monolithic package. The phase shifter we have developed herein using barium strontium titanate (BST) thin films shows continuous phase shifts of 0°~90° at 15GHz when DC bias voltages are applied up to 300 V between the ground and signal line. By controlling the voltages independently applied to each phase shifters, the beam shape and direction radiated from the array antenna can be changed and steered.
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