Due to the rapid development of wireless communication technologies, the number of
wireless users are radically increasing. Currently,~ 23 billion wireless devices are …

In this study, a novel Switched Beam Antenna (SBA) system is proposed and experimentally
validated for C-band applications. The system is made up of a 4× 4 Butler matrix, whose …

Lens antenna arrays can significantly reduce the number of radio frequency (RF) chains and
provide a cost-effective beamforming approach to millimeter-wave massive multiple-input …

In this paper, a wideband Butler matrix for the uniform circular array antenna (UCA)
generating multi-mode orbital angular momentum (OAM) vortex wave is designed. Firstly …

Butler matrix is a method of beamforming array antenna. Our objective was designing and
implementing a laboratory prototype of a 4x4 matrix, using microstrip technology. Theoretical …

El presente trabajo de titulación tiene como objetivo general diseñar una agrupación lineal
de antenas tipo parche con elementos T asimétricos, que se puede utilizar en diferentes …

For OAM application, the UCA element is fed by BFN with equal amplitude and progressive
phase difference [23]. In order to generate an OAM beam of±1/±2 mode by feeding eight …

In this paper, a design of a new compact 4*4 Butler matrix for UWB applications is
presented. The multilayer structure is used to design a drip-shaped coupler, which offers …

The development of a performance evaluation platform for fetal QRS detection algorithms
(fQRS) is presented. The platform allows to combine the three classic stages of these …