Analysis, Design and Measurement of a Series-Fed Microstrip Array Antenna for X-Band INDRA: The Indonesian Maritime Radar
Zijderveld, J.; Lestari, A. A.; Ligthart, L. P. (International Research Centre for Telecommunications and Radar, Delft University of Technology, Mekelweg 4, 2628CD Delft, The Netherlands)
A strategy to design and tunning of linear series centerfed patch array antenna as sub-array feed of a cylindrical reflector for INDRA (INDonesian maritime RAdar) is presented. INDRA is the first maritime radar built in Indonesia. The radar is a solid-state FMCW radar with operational frequency of 9.4GHz. The antenna system of INDRA employs microstrip-patch-array offset-fed reflector antennas. The first field measurement of INDRA is scheduled to take place in September 2008. The design of an 1×8-elements sub-array is performed using aMOM based software simulator. A Number of arrays have been built and measured. A good agreement between the numerical and measurement results are observed at the center frequency. Return loss of better than -25dB, and low sidelobe patterns with a maximum gain of 16dBi were simulated and measured. A bandwidth of 200MHz is observed for a return loss below -15dB.
