Straight forward analysis and design of the near-field direct antenna modulation

TLDR: To find the field of view and analyze the NFDAM system, an analytical and straight forward approach for the radiation pattern and bit error rate spatial distribution is presented and an expression is also proposed for calculating the input impedance for each symbol.

Abstract: Full analysis with straight forward approach and a general procedure for designing the near-field direct antenna modulation (NFDAM) system is presented. In this paper, the required formulas are derived for calculating the Z-matrix elements of the NFDAM system and then, by using them, a set of switching combinations for the desired modulation is chosen. Also, to find the field of view and analyze the NFDAM system, an analytical and straight forward approach for the radiation pattern and bit error rate spatial distribution is presented. In addition, since the input impedance of the NFDAM system changes by changing the switching combination, an expression is also proposed for calculating the input impedance for each symbol. Furthermore, the design process and finally, two examples of designing the NFADM system are given. All calculated results are compared and validated with different simulations, to evaluate the proposed analysis and design. All simulations show the high accuracy of the proposed analysis.