@ARTICLE{ iet:/content/journals/10.1049/el_19780377, author = {M. Sachidananda}, author = {S. Ramakrishna}, keywords = {blockage;optimum aperture distributions;aperture antennas;directivity factor;sidelobe level constraints;}, ISSN = {0013-5194}, language = {English}, abstract = {A method is presented for optimising the performance indices of aperture antennas in the presence of blockage. An N-dimensional objective function is formed for maximising the directivity factor of a circular aperture with blockage under sidelobe-level constraints, and is minimised using the simplex search method. Optimum aperture distributions are computed for a circular aperture with blockage of circular geometry that gives the maximum directivity factor under sidelobe-level constraints.}, title = {Optimum aperture distributions in the presence of blockage}, journal = {Electronics Letters}, issue = {17}, volume = {14}, year = {1978}, month = {August}, pages = {556-558(2)}, publisher ={Institution of Engineering and Technology}, copyright = {© The Institution of Electrical Engineers}, url = {https://digital-library.theiet.org/;jsessionid=4vubfl8bpbvl3.x-iet-live-01content/journals/10.1049/el_19780377} }