The frequency is 35 GHz, the carrier of conformal is a cylinder, and the angle between the main lobe of pattern and the carrier axis is 60°. This paper presents the design of a MIMO conformal antenna for 5G. Therefore, there has been extensive research on millimeter-wave microstrip antenna. In addition, the millimeter-wave band has attracted a lot of attention due to the advent of 5G technology and its inherent characteristics, such as short wavelength, wide frequency band, and propagation characteristics in the fog, snow, and dust environment. It is therefore more suitable for conformal antenna. The microstrip antenna has many advantages such as low profile, small size, light weight, and ease to integrate with other carriers. Microstrip antenna theory crack#Conformal antennas are usually microstrip antenna, stripline antenna, or crack antenna. It can be placed anywhere on the surface of the carrier. Conformal antenna can be designed on the surface of the carrier, which will not damage the mechanical structure of the carrier and can save space. To this end, the conformal antenna was designed. Īntennas are usually placed on the surface of the carrier to achieve the desired electromagnetic performance. At present, the research of MIMO multiantenna is focused on the exploration of low cost and high performance designs of antenna and layout. The research of MIMO multiantenna design mainly includes the form of antenna element, the layout of multiple antennas, and the mutual coupling analysis. MIMO wireless system is not only affected by the multipath characteristics of the wireless communication channel but also depends on the design and layout of the multiantenna system. Multiantenna system is an important part of MIMO technology. It can improve the quality of wireless communication and the rate of data exponentially without increasing the bandwidth and transmitted power. The MIMO system is equipped with multiple antennas at the transmitter and the receiver. It is a combination of multiple-input single-output (MISO) and single-input multiple-output (SIMO) and therefore has the advantages and characteristics of the two. Multiple-input multiple-output (MIMO) technology is originated from wireless communication antenna diversity technology and intelligent antenna technology. The return loss of the antenna at 35 GHz is better than 20 dB, the first sidelobe level is −16 dB, and the angle between the main lobe and the plane of array is 60°. Measurement results match the simulation results well. MIMO antennas have been fabricated and measured. Eight-element microstrip Taylor antenna array with series-feeding not only achieves the deviation of the main lobe of the pattern but also increases the bandwidth of the antenna array and reduces sidelobe. In this paper, 4 pairs of microstrip MIMO conformal antennas of 35 GHz have been designed. MIMO (multiple-input multiple-output) technology is expected to be one of the key technologies in the field of 5G wireless communications. With the development of wireless communication technology, 5G will develop into a new generation of wireless mobile communication systems.
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