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J Electromagn Eng Sci > Volume 10(4); 2010 > Article
Journal of the Korean Institute of Electromagnetic and Science 2010;10(4):309-315.
DOI: https://doi.org/10.5515/JKIEES.2010.10.4.309   
Dual Polarized Array Antenna for S/X Band Active Phased Array Radar Application
Min-Seok Han1, Ju-Man Kim1, Dae-Sung Park2, Hyoung-Joo Kim2, Jae-Hoon Choi1
1Dept. of Electronics and Computer Engineering, Hanyang University
2Core Technology Group of Samsung Thales
A dual-band dual-polarized microstrip antenna array for an advanced multi-function radio function concept (AMRFC) radar application operating at S and X-bands is proposed. Two stacked planar arrays with three different thin substrates (RT/Duroid 5880 substrates with $varepsilon_r$=2.2 and three different thicknesses of 0.253 mm, 0.508 mm and 0.762 mm) are integrated to provide simultaneous operation at S band (3~3.3 GHz) and X band (9~11 GHz). To allow similar scan ranges for both bands, the S-band elements are selected as perforated patches to enable the placement of the X-band elements within them. Square patches are used as the radiating elements for the X-band. Good agreement exists between the simulated and the measured results. The measured impedance bandwidth (VSWR$leq$2) of the prototype array reaches 9.5 % and 25 % for the S- and X-bands, respectively. The measured isolation between the two orthogonal polarizations for both bands is better than 15 dB. The measured cross-polarization level is ${leq}-21$ dB for the S-band and ${leq}-20$ dB for the X-band.
Key words: Dual Polarized, Array Antenna, Dual Band (S and X Bands), Radar, Active Phased Array


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