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http://dx.doi.org/10.5515/KJKIEES.2010.21.11.1248

Design of Series-Fed Microstrip Patch Array Antennas for Monopulse Radar Sensor Applications  

Park, Eui-Joon (School of Electronic Engineering, Kumoh National Institute of Technology)
Jung, Ik-Soo (School of Electronic Engineering, Kumoh National Institute of Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.11, 2010 , pp. 1248-1258 More about this Journal
Abstract
In this paper, a method for simultaneously realizing the sum and difference patterns which are required in the monopulse radar sensor systems, is presented by using single taper array antenna with rectangular microstrip patches. The widths of patches are first determined by the voltage weights which are synthesized for the fundamental array factor patterns to be applied to the monopulse operation by using the sidelobe levels(SLLs) control technique. As the bi-directionally series-fed technique is applied and the lengths of connecting lines between patches are appropriately adjusted, the single array generates two phase-shifted beams which activates out-of-phase and in-phase ports of a $180^{\circ}$ hybrid coupler to synthesize the sum and difference patterns. The simulated results on the configuration designed at 9.5 GHz are compared with measured results showing the validity of the proposed method.
Keywords
Monopulse Radar; Microstrip Array Antenna; Antenna Pattern;
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