Jean-Jacques Laurin

TL;DR: In this article, a reconfigurable reflectarray element consists of a microstrip patch, printed on a flexible membrane substrate, coupled to a transmission line loaded with two varactor diodes, allowing continuous tuning of the reflected signal's phase over a 360deg range with a maximum loss of 2.4 dB at 5.4 GHz.

TL;DR: In this article, a simple method based on transmission line circuit theory is proposed to model and design circular polarizers, which is more flexible than those previously presented in the way that it permits to design polarizers with the desired spacing between layers, while obtaining surfaces that are easier to fabricate and less sensitive to fabrication errors.

TL;DR: In this article, a new concept for exciting slots with a CPW line based on inductive coupling is presented, which is particularly suitable for series-fed array configurations and broad-band design.

TL;DR: In this paper, a two-dimensional cylindrical Luneberg lens is introduced based on TE10 mode propagation between parallel plates, with special focus on ease of manufacturing, and the parallel plates are partially filled with low-cost polymer material (Rexolite epsivr = 2.54) to match Lunesberg's law.

TL;DR: In this paper, a single substrate layer Luneburg lens-based beamforming network (BFN) operating in the $W$ -band is proposed and a multibeam antenna is then realized using the novel BFN and fabricated using a low-cost printed circuit board process.