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Listar por palabra clave "Antenna arrays"

Mostrando ítems 1-14 de 14

A broadband pattern diversity annular slot antenna

Gallo, Michelle; Antonino Daviu, Eva; Ferrando Bataller, Miguel; Bozzetti, Michele; Molina García-Pardo, José María; Juan Llacer, Leandro (Institute of Electrical and Electronics Engineers (IEEE), 2012-03)

An annular slot antenna suitable for pattern diversity in wideband applications is presented. Pattern diversity is obtained by feeding the antenna simultaneously with two microstrip lines printed on the back of the substrate, ...
A Comparison Between Concentrated and Distributed Massive MIMO Channels at 26 GHz in a Large Indoor Environment Using Ray-Tracing

Pérez, Jesús R.; Valle, Luis; Fernández, Óscar; Torres, Rafael P.; Rubio Arjona, Lorenzo; Rodrigo Peñarrocha, Vicent Miquel; Reig, Juan (Institute of Electrical and Electronics Engineers, 2022)

[EN] In this paper, a comparative analysis between concentrated and distributed massive multiple-input multiple-output channels (C-mMIMO and D-mMIMO respectively), in an indoor environment using ray-tracing (RT) in the 26 ...
Dual Circularly Polarized Aperture Array Antenna in Gap Waveguide for High-Efficiency Ka-Band Satellite Communications

Ferrando-Rocher, Miguel; Herranz Herruzo, José Ignacio; Valero-Nogueira, Alejandro; Bernardo-Clemente, Bernardo (Institute of Electrical and Electronics Engineers, 2020)

[EN] A novel fully metallic Ka-band dual circularly polarized antenna array is presented in this contribution. It consists of 64 circular apertures (8x8) and it is implemented in gap waveguide technology. The antenna ...
Harmonic up/down-conversion through photonic RF phase shifters in phased-array antenna beam-forming applications

Fuster Escuder, José Miguel; Martí Sendra, Javier; Corral, Juan L.; Candelas Valiente, Pilar (John Wiley & Sons, 1999-08-20)

[EN] A photonic device which achieves both phase shifting and harmonic photonic lip / down-conversion of outgoing / incoming microwave / millimeter-wave signals is presented. This device may be easily integrated, becoming ...
Herramienta de análisis de grandes agrupaciones de antenas a partir de agrupaciones más pequeñas

Serrano Callejas, Adrián (Universitat Politècnica de València, 2022-10-14)

[ES] El trabajo pretende desarrollar una herramienta que facilite el análisis aproximado de grandes agrupaciones de antenas a partir de la información disponible de agrupaciones más pequeñas y analizables que la agrupación ...
High-Efficiency Ka-Band Circularly Polarized Radial-Line Slot Array Antenna on a Bed of Nails

Herranz Herruzo, José Ignacio; Valero-Nogueira, Alejandro; Ferrando-Rocher, Miguel; Bernardo-Clemente, Bernardo (Institute of Electrical and Electronics Engineers, 2022-05)

[EN] Radial-line slot-array antennas (RLSAs) provide an extremely simple solution to achieve high-gain circularly polarized radiation patterns without the need for complicated feeding networks or polarizers. The dielectric-filled ...
Low-Sidelobe Flat Panel Array Fed by a 3D-Printed Half-Mode Gap Waveguide Amplitude-Tapering Network

Castellá-Montoro, Adrián; Ferrando-Rocher, Miguel; Herranz Herruzo, José Ignacio; Valero-Nogueira, Alejandro (Institute of Electrical and Electronics Engineers, 2024)

[EN] This article presents the design and evaluation of an 8 x 8 Ka-band low-sidelobe slot array antenna using gap waveguide technology. The slot array is fed by a single-layer amplitude-tapering network implemented in ...
Millimeter Wave MISO-OFDM Transmissions in an Intra-Wagon Environment

Sanchis Borrás, Concepción; Molina-García-Pardo, José-María; Rubio Arjona, Lorenzo; Pascual-García, Juan; Rodrigo Peñarrocha, Vicent Miquel; Juan Llacer, Leandro; Reig, Juan (Institute of Electrical and Electronics Engineers, 2021-08)

[EN] In this paper, the maximum achievable throughput is analyzed in the intra-wagon channel when multiple-input single-output (MISO) and orthogonal frequency division multiplexing (OFDM), MISO-OFDM, techniques are used. ...
Novel Asymmetric T-Shaped Radiating Element for Circularly-Polarized Waveguide Slot Arrays

Herranz Herruzo, José Ignacio; Ferrando-Rocher, Miguel; Valero-Nogueira, Alejandro; Bernardo-Clemente, Bernardo (Institute of Electrical and Electronics Engineers, 2021-11)

[EN] Waveguide slot arrays are a widely used solution to attain linearly polarized high-gain antennas. In this article, an all-metal T-shaped radiating element is conceived with the aim to replace the usual rectangular ...
On the Contribution of Dense Multipath Components in an Intrawagon Environment for 5G mmW Massive MIMO Channels

Challita, Frédéric; Rodrigo Peñarrocha, Vicent Miquel; Rubio Arjona, Lorenzo; Reig, Juan; Juan-Llácer, Leandro; Pascual-García, Juan; Molina-García-Pardo, José-María; Liénard, Martine; Gaillot, Davy P. (Institute of Electrical and Electronics Engineers, 2019-12)

[EN] In this letter, the dependence of the specular multipath components (SMC) and dense multipath components (DMC) to the interuser spatial correlation and sum-rate capacity of a massive multiuser multiple-input--multiple-output ...
Printed Multimode Antenna for MIMO Systems

Antonino Daviu, Eva; Cabedo Fabrés, Marta; Bernardo Clemente, Bernardo; Ferrando Bataller, Miguel (Taylor and Francis, 2011)

A compact printed multimode antenna for Multiple-Input Multiple-Output (MIMO) systems is presented. The antenna consists of a slotted metallic ring antenna excited by four L-shaped microstrip feeding lines, which are ...
Reconfigurable slot-array antenna with RF-MEMS

Sánchez Escuderos, Daniel; Ferrando Bataller, Miguel; Baquero Escudero, Mariano; Herranz Herruzo, José Ignacio (Institute of Electrical and Electronics Engineers (IEEE), 2011)

Cylindrical near-field measurement systems are being widely demanded, especially for imaging applications at millimeter-wave frequencies. One of their most important drawbacks is the long time required to perform a full ...
Single-Layer Sequential Rotation Network in Gap Waveguide for a Wideband Low-Profile Circularly Polarized Array Antenna

Ferrando-Rocher, Miguel; Herranz Herruzo, José Ignacio; Valero-Nogueira, Alejandro; Bernardo-Clemente, Bernardo (Institute of Electrical and Electronics Engineers, 2022)

[EN] A low-profile circularly-polarized sequential rotation fed 4 x 4 array antenna working in the Ka-band from 27.5 GHz to 31 GHz is presented. The particularity of the antenna lies in its single-layer sequential rotation ...
Wideband Circularly Polarized mm-Wave Array Antenna Using H-Shaped Low-Axial-Ratio Apertures

Herranz Herruzo, José Ignacio; Ferrando-Rocher, Miguel; Valero-Nogueira, Alejandro; Bernardo-Clemente, Bernardo (Institute of Electrical and Electronics Engineers, 2023-05)

[EN] An H-shaped all-metal radiating element comprising an active and a coupled slot has been proposed to design wideband high-efficiency circularly polarized antenna arrays. The proper excitation of several modes on the ...