Performance Analysis of Linear Array Using Kaiser Function

Analytical approach of Kaiser function implemented in a power-weighted linear array exposes its potentiality in terms of sidelobe level (SLL) suppression. As a part of experimental approaches, this paper demonstrates the implementation and performance analysis of a linear array based on Kaiser function. A modification on proximity coupled feeding network exciting the array is required to improve the performance of array. By folding the feeding layer, it is able to reduce spurious radiation that can interfere the radiation pattern. Whereas ensuring similar phase between feeding branches on each transmission line is important, so that the weighting effect is correctly observable. The developed linear array using FR4 epoxy dielectric substrates is in a 1×8 configuration with identical square patches and 0.6 λ
d
distance between patches. The proposed design and its realization show an SLL suppression of 24.54 dB – 25.25 dB for simulation and 27.96 dB – 33.47 dB for measurement. The gains of proposed linear array are 9.15 dBi and 6.9 dBi for simulation and measurement, respectively.