On the Use of Fly’s Eye Lenses with Leaky-Wave Feeds for Wideband Communications

Abstract

In order to fulfill the exponential increase in the demand of high-speed wireless links, future XG wireless networks will be developed at higher carrier signal frequencies, reaching the hundreds of gigahertz. In this contribution, a leaky-wavefed HDPE lens antenna working at G-band which can be useful for future XG communications is presented. The proposed lens design enables the generation of up to 40 beams, with gains higher than 30 dB. Analytical tools have been applied to optimize the lens aperture efficiency, validating the results via full-wave simulations. The reached aperture efficiency for the broadside beam is higher than 80% over a 44% relative bandwidth. The measurement results for a fabricated prototype show excellent agreement with the simulated performance.

A Dual-Polarized 27 dBi Scanning Lens Phased Array Antenna for 5G Point-to-Point Communications

“…This type of plastic is low-cost, low-loss, and suitable for milling technique used for mass production [17]. Moreover, the proposed dual-polarized LWA feeds based on this low-contrast material will achieve a wide BW [17]. Simulations show a 22.7% BW from 24.6 to 30.9 GHz, with the polarization isolation better than 50 dB over the entire BW.…”

“…In this paper, wide frequency BW in the order of 20% is targeted. Accordingly, the medium should have a low relative permittivity [17].…”

“…Moreover, there is also an undesired TM 0 mode propagating [22], which radiates towards 40 • in the E-plane of the feed. In [17], it was shown that this mode can be exploited to increase the lens aperture efficiency. However, this is not the case for the electrically small lenses in current configuration since the effective area associated to this mode is larger than the lens diameter.…”

“…In particular, the lens array is made of high-density polyethylene (HDPE), with ε r = 2.34 and tan δ = 0.0003. This type of plastic is low-cost, low-loss, and suitable for milling technique used for mass production [17]. Moreover, the proposed dual-polarized LWA feeds based on this low-contrast material will achieve a wide BW [17].…”

Coherent Fourier Optics Model for the Synthesis of Large Format Lens-Based Focal Plane Arrays

“…For instance, cryogenic Kinetic Inductance Detectors (KIDs) coupled lenses are employed for passive cameras [3], [6]. Moreover, future high frequency communication systems will use integrated lens antenna technology [9]. The next generation of sub-millimetre imagers are planned to have focal plane arrays (FPAs) with over 1000 detectors to improve the overall image acquisition speed.…”