Abstract
In this work, is presented the design of a linear multi-beam antenna. The designed procedure is focused on the possibility of switching off a part of antenna array elements, in active antenna systems, in order to preserve resources (power and heat dissipation). The behavior of the original multi beam antenna design is investigated on the radiation pattern alteration due to the switched off elements. The choice of switching on/off antenna elements requires less computational effort from the algorithms incorporated in the active antenna system. Antenna array beam design using progressive phase shifts permits beam orthogonality which is valuable over use multiple beam antenna. In this work, turning off part of antenna elements will inevitably change the beam orthogonality conditions. Despite this, the case presented in this paper, shows beam space discrimination better than 10dB. To rank the behavior of modified antenna, with the turned off elements, are used both Euclidean and Hausdorff distances to measure the changes resulted from the modified array performance. The obtained solutions show the applicability of binary operation on existing antenna array. The metric showed in here can be effectively used as ranking criteria.
Highlights
The mobile telephony system has continually grown, new technologies are continuously applied like the ones of signal processing capabilities and enhanced modulation scheme, those related to antenna design and operating [1][2][3]
The designed antenna array used in sub-6GHz sub band (2100 – 2600 MHz) is approximately 220 cm high
In this work is presented the analysis of a multi-beam antenna array used with partially switched On/Off antenna elements
Summary
The mobile telephony system has continually grown, new technologies are continuously applied like the ones of signal processing capabilities and enhanced modulation scheme, those related to antenna design and operating [1][2][3]. Combination of massive MIMO with full digital beam forming architecture, especially in the sub-6GHz sub band, permits an increase on the obtained throughput per user [6]. This can be possible by creating orthogonally multiple antenna beams. The multi-beam antenna feed can be achieved through full digital beam forming network One of the biggest drawbacks of this architecture, rather than its cost, is the power consumption and high heat dissipation requirements [10] [11]
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