Dual-Band Dual-Linearly Polarized Transmitarray at Ka-Band

Abstract

We present here the design and the optimization of a dual-band dual linearly-polarized transmitarray antenna with a 1-bit phase resolution (i.e. two phase states with 180° of relative phase-shift). The antenna operates in both downlink and uplink K/Ka-bands (17 -21 GHz for the lower frequency band, and 27 -31 GHz for the upper one) and could be used for satellite communication applications. In order to implement dual-band and dual-polarization, the unit-cell consists of four orthogonal superposed U-slotted patch antennas interconnected by a metallized via hole. A 2020 transmitarray based on the proposed unit-cell architecture has been optimized by using our in-house tool and validated through full-wave electromagnetic simulations. The 55 mm² unit-cell size allows beam scanning over large field of view (up to 80 deg.). A maximum gain of 23.4 and 21.4 dBi has been achieved at 29.1 GHz and 19.5 GHz, respectively. The gain 1-dB bandwidth is equal to 17.4% and 10.5% at the lower and the upper frequency bands, respectively.

Dual-Band, Dual-Linearly Polarized Transmitarrays for SATCOM Applications at Ka-Band

“…This configuration leads to a much more compact lattice size. This technique has already been introduced in our preliminary paper [15]. The unit-cell stack-up is made of five metal layers (Rx patch for the uplink, Rx patch for the downlink, ground plane, Tx patch for the downlink, and Tx patch for the uplink) printed on four different dielectric substrates.…”

Recent Achievements on Passive and Beam Steering Transmitarrays at Millimeter Waves

“…A shared-aperture dual-band/dual linearly polarized AFA UC design has been proposed in [6]. If compared to the interleaving strategy, which is typically used to implement multi-band TA, the advantage of the proposed design methodology is the possibility to minimize the period of the UC.…”

“…Unit-cells (UCs) based on Antenna-Filter-Antenna (AFA) [2], [6] or Frequency-Selective-Surface (FSS) [3], [7] are typically used to design TAs. AFA architectures with metallized vias have been employed up to 140 GHz [6].…”

“…Unit-cells (UCs) based on Antenna-Filter-Antenna (AFA) [2], [6] or Frequency-Selective-Surface (FSS) [3], [7] are typically used to design TAs. AFA architectures with metallized vias have been employed up to 140 GHz [6]. They are attractive when advanced functionalities such as dualband/dual-polarization and/or beam-forming are required.…”

Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

“…None of the antennas reported in the state-of-the-art literature have shown the desired antenna performance characteristics of both simultaneously having dual-band operation with a high frequency-ration and lowfrequency beamforming capabilities. Some antennas reported in the literature satisfies parts of the requirements, but unlike the antenna presented in this paper none of them covers all the listed requirements simultaneously [16], [18], [22], [24].…”