Abstract
Multiple input multiple output antenna is the key technology which enables the design of 5G networks. In order to achieve desired beam forming and side lobe reduction capabilities, antennas used in MIMO technology are required to feed with signals having different phase and amplitude. It is possible to achieve variable phase shift and variable attenuation using phase shifter and amplitude limiters. However when these devices are used between source and antenna, they makes the system non planner and non-conformal. This research presents a 16 element, multiple user MIMO Patch antenna with conformal and planner power divider network to achieve electronically steered beam along with the desired side lobe level reduction. Wilkinson power divider is used to achieve conformal and planner power divider for MIMO antenna. Desired beam forming capabilities are achieved by controlling the phase of input signal to antennas by controlling the length of microstrip line and desired side lobe reduction capabilities are achieved by controlling the amplitude of input signal to antenna by controlling the width of microstrip line used in Wilkinson power divider. This provides an overall planner and conformal structure. In this research same antenna is used to generate two major beams by controlling the phase and amplitude of input signal. The designed structure is simulated and analyzed using HFSS. Simulated results for the designed MIMO antenna are verified by analyzing the fabricating structure using vector network analyzer and horn antenna. The novelty in this research is to design power divider, phase shifter and amplitude limiter in single unit.
Highlights
The evolution of wireless technology is continuously influencing the every sphere of life
Desired beam forming capabilities are achieved by controlling the phase of input signal to antennas by controlling the length of microstripline and desired side lobe reduction capabilities are achieved by controlling the amplitude of input signal to antenna by controlling the width of microstrip line used in Wilkinson power divider
The achieved radiation pattern of designed antenna consists of one major beams having gain of 18 dB and located at theta equal to 100 and Phi equal to 1800
Summary
Introduction: The evolution of wireless technology is continuously influencing the every sphere of life. World had entered into fifth generation of wireless technology where date rate up to 20 GBPS, Channel bandwidth of 500 MHz and latency time less than one millisecond is achievable This could make possible due to use of millimeter waves in 5G technology [1-7]. The key requirement to implement 5G technology are antennas having, very high gain, electronically beam steering capabilities, able to operate in millimeter wave dimensions and having conformal structure. These requirements can be achieved through a great extent by using multiple input and multiple output technology (MIMO). The proposed MIMO antenna can be potentially used in Radar base stations
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