Substrate integrated coaxial line design for mmWave antenna with multilayer configuration

Abstract

In the 5G communication utilizing millimeter-wave (mmWave) band, multilayer configuration is popular for mmWave antenna with module-level integration and high-density design. However, multilayer construction adds several substrate layers and metallic ground layers to RF signal paths, which induces extra capacitances and inductances to the original antenna, thereby deteriorating impedance matching, and distorting radiation patterns. In this paper, we investigate the influence of multilayer structure on antenna performances, and apply substrate integrated coaxial line (SICL) design to eliminate these interferences from multilayer configuration. Equivalent circuit model of the multilayer configuration with SICL is presented and verified by simulations. A mmWave antenna unit and the 1 Â 4 array in multilayer configuration with SICL design are measured. Experiments show that SICL design enables impedance matching and radiation patterns to be maintained without distortions when applying multiple layers to the mmWave antenna, validating this method. It can be applied to 5G mmWave antennas that desire multilayer construction.

A New mm-Wave Antenna Array with Wideband Characteristics for Next Generation Communication Systems

“…The pro posed antenna system is compared with refs [4,11,13,14,18,19]. Refs [3,11,19] are based on the planar monopole antenna array, while refs [4,18] are based on the SIW technique From the table, it is concluded that the proposed antenna array is well designed and de livers high gain with reduced size and wide bandwidth characteristics. Table 1 summarizes the proposed antenna contribution in the literature.…”

“…Table 1 summarizes the proposed antenna contribution in the literature. The proposed antenna system is compared with refs [4,11,13,14,18,19]. Refs [3,11,19] are based on the planar monopole antenna array, while refs [4,18] are based on the SIW technique.…”

“…[3,11,19] are based on the planar monopole antenna array, while Refs. [4,18] are based on the SIW technique. From the table, it is concluded that the proposed antenna array is well designed and delivers high gain with reduced size and wide bandwidth characteristics.…”

“…With the evolution of communication systems in modern telecommunication infrastructure, 5G is standardized throughout the world, offering high channel capacity characteristics with an increased number of users connected and low latency over the communication channel [1][2][3][4]. The 5G spectrum is categorized into two broad regions as Sub6 GHz, ranging under 6 GHz frequency, and mm-wave region, in which frequencies above 24 GHz and above are adopted.…”