Dual-polarized slot-coupled patch antennas on Duroid with teflon lenses for 76.5-GHz automotive radar systems

Novel microstrip antenna element and 2‐by‐2 array for satellite TV receivers

“…Dual-polarized microstrip antenna fed by slot coupling is first reported in [1]. In [2,3] the authors show that arranging the positions of the two orthogonal coupling slots into a "T" configuration results in improving the isolation significantly. The same "T" configuration has been adopted in [4] using U-shaped slots.…”

“…The work done in [1][2][3][4][5][6][7] has the objective of enhancing the isolation between the two ports of the dual-polarized antenna. There is another trend of research directed toward enhancing the bandwidth of such antennas.…”

Shape optimization of lens antennas for Short Range and Long Range sensors at millimeter waves

“…Among those, lens antennas are attractive since they are highly directive (the typical gain for ACC applications is around 29dBi), which is desirable to distinguish targets in a predetermined field of view. Various lens configurations have been proposed so far, like plano-convex lenses [1][2][3], spherical [4] and hemi-spherical [5] homogeneous lenses, non-homogeneous lenses [6,7], and constrained lenses [8]. In addition, from the regulatory point of view, the Short Range Radar (SRR) sensors in Europe should operate in the frequency range between 77-81GHz (79-GHz band) from mid-2013.…”

Circularly Polarized Microstrip Antennas with Proximity Coupled Feed for Circularly Polarized Synthetic Aperture Radar

“…the same impedance bandwidth. A T-shaped disposition could be used to increase the isolation (Porter et al, 1999), but the impedance bandwidth of the two ports would then be dissimilar. The same observation has been made in (Perron et al, 2007) for a dual-polarized CPW-fed microstrip antenna operating at 2.45 GHz.…”