Linearly polarized microstrip reflectarray with microstrip antenna feed

Abstract

Microstrip Reflectarrays (MRAs) are typically excited using the horn antenna. In this paper, a different microstrip antenna feed to excite MRA, which is having patches of variable size, is proposed. Three different configurations namely, 2 × 2, five elements arranged in two orthogonal axes, and 3 × 3 element MRAs have been investigated to prove the concept. These configurations were first simulated using IE3D software, followed by their experimental verifications.

Dual polarized stub loaded microstrip Reflectarray with microstrip antenna feed

“…The path length between the feed and the center patchis shorter than that of the parasitic patches. To compensate for the difference in path lengths, MRAs with variable size patches are used [6]. The changing lengths of the patch detune the parasitic elements from the resonance frequency of the fed patch.…”

“…The changing lengths of the patch detune the parasitic elements from the resonance frequency of the fed patch. Patches with stubs of variable lengths can also be used to compensate for the phase difference [6]. By adding stubs along the length, linearly polarized MRAs are obtained [7].In many applications, transmitting and receiving antennas are required to be operating in dual polarizations (i.e.…”