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Purpose: This paper analyzes the phenomenon on the degradation of the e lectrical performance by the pres-sure in the manufacturing process of sandwich type radomes.Methods: This paper consists of two steps to analyze the relation betwe en the electrical performance and the pressure. First, the thickness of the core of the flat panels which were fabricated with different pressure was measured with the microscope, and then the electrical perfo rmance of the flat panels was analyzed with simulation and experiment. Based on the results of the electrical performance and the measured thickness with respect to the flat panels, the relation between the elect rical performance and the applied pressure in the manufacturing process was analyzed. Results: The simulated and measured results with respect to the flat panel shows that the high pressure results in the nonuniform thickness of the core, which is appli ed to the radome fabrication. As a result, the degradation of the electrical performance occurs because the un intended scattered field is generated as the electromagnetic wave transmits (or impinges upon) the radome. Furthermore, we observed that the electrical performance of both the flat panel and the radome got worse as the high pressure was applied. Conclusion: Through simulation and experiment, therefore, it is demonstrat ed that for the high pressure in the manufacturing process the nonuniform thickness of the core increases and results in the degradation of the electrical performance of the radome.

A Study on Effects of the Cure Pressure for the Improvement of the Electrical Performance of the Sandwich Type Radome