An alternative approach to the design of multiple beam constrained lens antennas

Authors

RASİME UYGUROĞLU
ABDULLAH YÜCEL ÖZTOPRAK

DOI

10.3906/elk-1606-215

Abstract

Rotman lenses are constrained lenses that are used as beam-forming networks to feed array antennas. Their design is based on three focal points, producing three beams with perfect phase fronts. This paper introduces an alternative constrained lens, which has phase equality at five radiating array elements for each beam position. In addition, the center point of the feed curve produces a perfect beam at broadside. The performance of this lens is analyzed and compared to the conventional Rotman lens. The analysis demonstrates that the new lens has better phase performance for wide angle designs. Our study shows that the phase errors of the proposed lens can be as low as half of those produced when using the conventional Rotman lens.

Keywords

Antenna arrays, multiple beams, Rotman lens antennas, phase error, constrained lens antenna

First Page

3334

Last Page

3341

Recommended Citation

UYGUROĞLU, RASİME and ÖZTOPRAK, ABDULLAH YÜCEL (2017) "An alternative approach to the design of multiple beam constrained lens antennas," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 25: No. 4, Article 63. https://doi.org/10.3906/elk-1606-215
Available at: https://journals.tubitak.gov.tr/elektrik/vol25/iss4/63