Abstract
A linearly polarized broadband reflectarray is presented employing a novel single layer subwavelength phase shifting element. The size of the element is a fifth of a wavelength at the center frequency of 10 GHz and the element consists of double concentric square rings of meander lines. By changing the length of the meander line, a 420° phase variation range is achieved at the center frequency. This characteristic makes the proposed configuration unique, as most of the reported subwavelength reflectarray elements can only realize a phase range far less than 360°. In addition, the slope of the phase response remains almost constant from 9 to 11 GHz, demonstrating a broadband property. A 48 × 48-element reflectarray antenna is simulated, fabricated, and measured. Good agreement is obtained between simulated and measured results. A measured 1.5-dB gain bandwidth of 18% and 56.5% aperture efficiency is achieved.
Original language | English |
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Pages (from-to) | 378-383 |
Number of pages | 6 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 64 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2016 |
Externally published | Yes |
Keywords
- Double square ring
- meander line
- microstrip
- reflectarray antenna
- subwavelength