Abstract
This paper presents a compact single layer reflectarray antenna based on a diagonally notched square patch and a pair of circular delay-lines, for X-band applications. The length and width of circular delay-lines are varied and optimized to attain a linear phase range of more than 600°. The effect of incident angle in TE and TM modes at 0°, 15° and 30° is studied, which offers stable angular phase range. The hybrid Finite Element Boundary Integral (FEBI) method is used for simulation of the whole reflectarray system comprising of 27 × 27 elements and being fabricated on a low cost FR-4 laminate. The measured gain of 24.5 dBi with aperture efficiency of 49.5% is achieved at 10 GHz. The proposed design provides the measured 1-dB gain bandwidth of 12.5% and 3-dB gain bandwidth of 34%. The simulated and measured side-lobe-levels and cross polarizations are less than -25 dB and -40 dB, respectively.
Original language | English |
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Pages (from-to) | 440-447 |
Number of pages | 8 |
Journal | Radioengineering |
Volume | 27 |
Issue number | 2 |
DOIs | |
Publication status | Published - 01 Jun 2018 |