7 documents found, page 1 of 1
The Involuntary-To-Voluntary Hospitalization Transition and the Risk of Psychia...
Castro, Margarida; Tavares Coelho, Joana; Ferreira, Ana Rita; Salgado, HenriqueIntroduction: Involuntary hospitalization of a patient with a mental disorder is broadly defined as the admission to an inpatient unit without the patient’s consent. Literature suggests that involuntary hospitalizations are associated with low levels of treatment satisfaction, avoidance of mental health care, and an increased risk of emergency involuntary re-hospitalization. Despite being a lifesaving treatment...
Substrate integrated waveguide cavity backed slot antennas for millimeter-wave ...
Finich, Sanaâ; Salgado, Henrique; Pinho, PedroA low-cost single-layer substrate-integrated waveg uide (SIW) cavity-backed slot antenna is proposed for millimeter wave applications. The structure is designed to operate at the W-band. The T-shaped slot antenna is placed on the back-side of the SIW and fed by a grounded coplanar waveguide (GCPW) transmission line. A transition between the (GCPW) and the SIW is also designed. The simulated results provide that...
Design of an anechoic chamber for W-Band and mmWave
Pinho, Pedro; Santos, Hugo; Salgado, HenriqueIn this paper, we describe the design of an electrically large anechoic chamber for usage on millimetre-wave bands. Ansys Savant sotware was used to perform a simulation of the chamber, using physical optics coupled with uniform theory of diffraction (PO/UTD). Moreover, a method based on an open waveguide probe is described in this paper to obtain the electrical properties of the RF absorbers at millimetre-wave...
Patch antenna-in-package for 5G communications with dual polarization and high ...
Santos, Hugo; Pinho, Pedro; Salgado, HenriqueIn this paper, we describe the design of a dual polarized packaged patch antenna for 5G communications with improved isolation and bandwidth for K-band. We introduce a differential feeding technique and a heuristic-based design of a matching network applied to a single layer patch antenna with parasitic elements. This approach resulted in broader bandwidth, reduced layer count, improved isolation and radiation ...
Meander-line monopole antenna with compact ground plane for a bluetooth system-...
Santos, Hugo M.; Pinho, Pedro; Silva, Rui Pedro; Pinheiro, Márcio; Salgado, HenriqueIn this letter, a packaged compact meander-line monopole antenna for Bluetooth communications, manufactured in low-density fan-out technology, is presented. A combined size for the antenna and ground plane of 0.1 lambda(0) x 0.06 lambda(0) x 0.008 lambda(0) is obtained. Such small antennas are usually designed considering their connection to an evaluation board with a large ground plane, which improves their ga...
Dual-polarized patch antenna-in-package with high isolation for Ka-Band 5G comm...
Santos, Hugo Miguel; Pinho, Pedro; Salgado, HenriqueIn this paper we describe the design of a dual polarized packaged patch antenna for 5G communications with improved isolation and bandwidth for Ka-band. The results were validated using FEM and Momentum co-simulations in ADS. The novelty of the approach is the use of parasitic elements in the same layer to circumvent bandwidth limitations, thereby reducing the layer count in contrast to previous designs, combin...
Elliptical monopole antenna on InP substrate for sub-THz RTD-based oscillators
Santos, H. M.; Pessoa, Luis; Salgado, Henrique; Pinho, PedroThe high permittivity of InP substrates has been a limiting factor for the bandwidth and efficiency of antennas fabricated in this material. In this manuscript we propose an elliptical monopole, monolithically fabricated in InP, fed by a CPW line. The suggested topology was simulated using HFSS finite element method. Input reflection coefficient measurements were performed on the monopole to validate the propos...