Based on a tile architecture, a highly integrated Ku-band active phased array antenna capable of ±70° beam scanning is designed. The active phased array consists of a microstrip patch panel array antenna, transmit/receive(T/R)modules, beam control and feed networks, and heat sinks. The T/R modules are designed in a tile configuration, with each channel capable of simultaneously prestoring amplitude and phase compensation codes for both the receive and transmit branches. Compared with traditional brick-type T/R modules, this design significantly reduces the dimension along the RF signal propagation direction while achieving monolithic integration of 128 channels, thereby realizing miniaturization, lightweight, and high reliability. The antenna array adopts a triangular lattice arrangement, which improves the gain by approximately 1 dB at a 60° scan angle compared with conventional rectangular lattice structures. This active phased array also features the advantages of low profile, thin and lightweight design, and simple assembly/disassembly.