Scholarlink

This work demonstrates the design of a multiband three-port 3X1 MIMO omnidirectional antenna to meet the various demands spectrum involving diverse applications. The implementation supports 5G, global positioning system (GPS), and Wi-Fi communication. A Rectangular Microstrip antenna operating at three different bands, 698–960 MHz, 1710–2100 MHz, and 3300–4000 MHz, was designed. The substrate chosen for antenna involves RO4350B substrate having a dielectric constant 3.66 and thickness of 0.51 mm. The results showed an acceptable return loss greater than −10 dB and gain more than 3 dB for all bands of operation and significant mutual coupling. The design and simulation performed using Ansys HFSS simulation software. The antenna was tested with vector network analyzer after fabrication for S-parameters and far field radiation was measured with anechoic chamber, and the results were compared. The dimensions of the antenna are 180 mm × 150 mm × 0.51 mm, which is smaller than the commercial antennas available in the market. A gain of 3.5–4.8 dBi was realized with designed antenna with omnidirectional (horizontal) coverage that can achieve a reliable communication. The antenna designed can support 4G LTE and 5G networks, thereby enabling mobile data access in buildings with high-speed.

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Design and Implementation of Three-Port High Isolation Multiband Antenna for In-Building Environments

  • 会议论文

  • 发表日期：

    2026年

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  • P. Shanthi,
  • D. Shashank

摘要

This work demonstrates the design of a multiband three-port 3X1 MIMO omnidirectional antenna to meet the various demands spectrum involving diverse applications. The implementation supports 5G, global positioning system (GPS), and Wi-Fi communication. A Rectangular Microstrip antenna operating at three different bands, 698–960 MHz, 1710–2100 MHz, and 3300–4000 MHz, was designed. The substrate chosen for antenna involves RO4350B substrate having a dielectric constant 3.66 and thickness of 0.51 mm. The results showed an acceptable return loss greater than −10 dB and gain more than 3 dB for all bands of operation and significant mutual coupling. The design and simulation performed using Ansys HFSS simulation software. The antenna was tested with vector network analyzer after fabrication for S-parameters and far field radiation was measured with anechoic chamber, and the results were compared. The dimensions of the antenna are 180 mm × 150 mm × 0.51 mm, which is smaller than the commercial antennas available in the market. A gain of 3.5–4.8 dBi was realized with designed antenna with omnidirectional (horizontal) coverage that can achieve a reliable communication. The antenna designed can support 4G LTE and 5G networks, thereby enabling mobile data access in buildings with high-speed.