Design of Broadband Transmitarray Unit Cells With Comparative Study of Different Numbers of Layers

Abstract

Abstract-Transmitarray antennas are being developed to significantly reduce the mass and the cost of beamforming antennas for satellite communication. A generalized methodology to design low profile transmitarray antennas made of several stacked layers with non-resonant printed phasing elements is presented. A study of the unit cell bandwidth, phase-shift range and tolerances has been conducted considering different numbers of layers. A structure with 3 metallized layers with capacitive and inductive elements enabling a phase range of nearly 360 degrees and low insertion loss is introduced. An implementation on a flexible substrate of a transmitarray with progressive phase shift operating at 19GHz is used for validation.

Dual‐polarized planar lens antenna designed with a quad‐ridged frequency selective surface

“…8 This paper proposes an alternative solution based on the use of an FSS working as a microwave planar lens. This operation is similar to the one presented by the so-called transmitarray antennas, [9][10][11] in which the phase profile given by the feeder, placed at a medium-long distance (typically F/D ≈0.85), is properly flattened. In our case, the FSS is placed at a shorter distance (F/D = 0.24) from the feeder (a radially corrugated horn antenna [RCHA] 12 ) to minimize the spill-over losses and, in turn, increment the gain of the feeder.…”

Wideband Transmitarray With Reduced Profile

“…Compared to other reported TA designs of This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ similar gain bandwidth [8], [9], the presented design reduces theprofileto0.36λ while maintaining the wideband operation with promising aperture efficiency. Because the trilayer FSS is printed on two substrates and does not require any vias, the present design can be fabricated using standard printed circuit board (PCB) process with relatively low fabrication cost.…”

“…Between each substrate, there is an approximately quarter-wavelength air gap, and the total thickness of this TA is 0.76λ. Another wideband TA using similar configuration was reported in [9], which also uses four conductive layers printed on four substrates spaced by air gaps to obtain the 360 • phase shift range. The reported 1 dB gain bandwidth is 15% with a total thickness of 0.65λ.…”

A simple design of SIW horn fed multibeam transmitarray antenna using transmission matrix approach

“…Each unit cell in the TA is capable of individually tuning a desired phase shift across the aperture with full transmission . These stacks of scatters can be interpreted as sheet admittances . The beam‐scanning TA requires quick‐optimized, low‐profile, low‐cost, wideband, and wide scan range solutions, which would be a solving scheme for 5G networks.…”

“…2 These stacks of scatters can be interpreted as sheet admittances. [3][4][5] The beam-scanning TA requires quick-optimized, low-profile, low-cost, wideband, and wide scan range solutions, which would be a solving scheme for 5G networks.…”