Analytical Comparison of Blackman and Kaiser Functions for Power Weighted Linear Array Antennas with Small Number of Elements

One method to gain desired radiation characteristics from some linear array antennas is by implementing an appropriate power weighted function upon the elements of array antennas. In this paper, analytical comparison of two power weighted functions, i.e. Blackman and Kaiser, is investigated for linear array antennas with small number of elements. Some linear array antennas with small odd and even number of elements are used to implement the weighting coefficient based on Blackman and Kaiser functions at the X-band frequency of 9.5GHz. The use of both functions is intended to have some expected radiation characteristic in terms of width of mainlobe (WML) and sidelobe level (SLL). The analysis result shows that Blackman function with small number of elements could achieve the radiation characteristics with predefined SLL of 68.8dB and inter element spacing of $\lambda$/1.5, but with some WML enhancement. This performance is better in SLL suppression than Kaiser function with predefined SLL of 68.8dB and $\beta$ of 6.623.