Design of low profile high gain antenna loaded with artificial magnetic conductor

With the rapid development of China's radio system technology, antenna, as an important signal transceiver, has higher requirements in research and design. At the same time, with the development of electromagnetic metamaterials, artificial electromagnetic materials with periodic structure have been widely used. A low profile, high gain antenna is designed based on the high impedance and in-phase reflection characteristics of artificial magnetic conductor (AMC). The upper layer of the antenna is a reflective cladding loaded with AMC structure, and the lower layer is a rectangular microstrip patch antenna loaded with AMC array. At the same time, the Fabry-Perot resonant cavity principle is used to separately adjust and control the reflection phase of the reflective cladding and the ground plate, so as to realize the low profile design of the antenna. In addition, combined with the multilayer process of low temperature co-fired ceramics (LTCC) technology, miniaturization is further realized. The simulation results show that the proposed antenna covers Ka band, and the center frequency is 23GHz. Compared with the original antenna, the profile of the antenna is reduced to 1.5mm, which is one-ninth of the operating wavelength. In addition, the peak gain of the antenna reached 11.53dB, an increase of 5.98dB.