Beam Forming Algorithm with Different Power Distribution for RFID Reader

Abstract

It is possible to achieve higher BE and lower SLL of array antenna by implementing different amplitude or phase distribution technique in the array antenna. The phase errors of the system should also be kept to a minimum in order to maintain lower SLL and higher BE. The phase errors can come from any of the stages: signal detection, MW/RF generation, amplifier/attenuator, phase synchronization, phase shifter, et cetera. The phase error can be reduced by using non-uniform element spacing. In this chapter some methods of SLL reduction and increase of BE by adopting some edge tapering concepts and minimization of phase errors by implementing non-uniform spacing of array elements are discussed. The spectrum below 10 GHz frequency will likely be congested, and the spreading of millimetre wave technology in different emerging wireless applications as well as associated increase in energy consumption will be witnessed in the near future. In this chapter some new and better beam forming techniques for optimization between side lobe levels and beam efficiency are discussed. Different frequency bands of RFID systems are also focused on in this chapter.