November 21, 2022
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Article

3D Printed Directive Beam-Steering Antenna Based on Gradient Index Flat Lens with an Integrated Polarizer for Dual Circular Polarization at W-band

Publicated to: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. 71 (1): 1059-1064 - 2023-01-01 71(1), DOI: 10.1109/TAP.2022.3217177

Authors:

Melendro-Jimenez, J; Sanchez-Olivares, P; Tamayo-Dominguez, A; Sun, X; Fernandez-Gonzalez, JM
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Affiliations

Univ Politecn Madrid, ETSI Telecomunicac, Informat Proc & Telecommun Ctr IPTC, Madrid 28040, Spain - Author
Universidad Politécnica de Madrid - Author

Abstract

In this communication, the design of a circularly polarized perforated gradient index flat lens antenna with directive beam-steering properties is presented for millimeter-wave applications at W- band (75 – 95 GHz). The dielectric lens, fed by an open-ended square waveguide located in the lens focal plane, enhances the radiation in a particular direction, generating a high-directivity beam with planar wavefront. The integration of a dielectric polarizer with the lens allows the conversion from a linearly polarized incident wave to a circularly polarized emitted wave over the whole bandwidth. Horizontally and vertically polarized waves, achieved by the excitation of the fundamental square waveguide TE01 and TE10 modes are transformed to left-hand circularly polarized and right-hand circularly polarized waves, respectively. A ±30° scan range in both azimuth and elevation planes is demonstrated for the whole frequency range, attained by displacing the feed along the focal plane of the lens. Lens and polarizer are manufactured as a single piece by stereolithography 3D printing technology with Form 3 Formlabs 3D-printer. Measured results show maximum measured directivity values that range from 23.5 to 23.8 dB, a remarkable circular polarization purity as a wide axial ratio bandwidth of 20.58% (< 3 dB), from 77.5 GHz to 95 GHz, is achieved for the principal beam steers and an aperture efficiency for broadside beam direction between 90.32% and 57.34% in the frequency band of interest.
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Keywords

arraycircular polarizationdesignlens antennasreconfigurable antennasAntenna feedsBeam steeringCircular polarizationDielectricsDirective antennasLens antennasLensesMillimeter wave communicationMillimeter wave technologyPermittivityReconfigurable antennasWave

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2023, it was in position 74/353, thus managing to position itself as a Q1 (Primer Cuartil), in the category Engineering, Electrical & Electronic.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations provided by WoS (ESI, Clarivate), it yields a value for the citation normalization relative to the expected citation rate of: 5.8. This indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 13, 2025)

This information is reinforced by other indicators of the same type, which, although dynamic over time and dependent on the set of average global citations at the time of their calculation, consistently position the work at some point among the top 50% most cited in its field:

  • Weighted Average of Normalized Impact by the Scopus agency: 5.19 (source consulted: FECYT Mar 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2026-04-27, the following number of citations:

  • WoS: 32
  • Scopus: 40
  • Google Scholar: 12
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-27:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 18 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/88804/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 188
  • Downloads: 89
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Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (MELENDRO JIMENEZ, JAVIER) and Last Author (FERNANDEZ GONZALEZ, JOSE MANUEL).

the author responsible for correspondence tasks has been SANCHEZ OLIVARES, PABLO.

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