Performance evaluation of a passive UHF RFID tag antenna using the embedded T-Match structure

Section: Introductionmentioning

confidence: 99%

Modeling a Square Slotted Antenna for 5G Applications using an Equivalent Circuit Approach

Meskini,

Aghoutane,

Hiddar

et al. 2023

“…Today, RF applications are used in different scientific fields. From a commercial point of view, modern applications that integrate RF include smartphones, 3G, 4G and Wi-Fi wireless networks, millimeter-wave collision sensors for vehicles, satellite communications, global Positioning Systems, RFID radio frequency identification marking [8], etc. the global electronics market is still guided to this day by cellular telephony (future 5G) but in a couple of years it is really connected objects (IoT) [2].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Characteristics of a 3 dB Hybrid Coupler for 5G Applications

Basset¹,

Aghoutane²,

Ghzaoui³

et al. 2021

The 3 dB, 90° coupler is a passive device with four ports that allows each output to collect half the input power but in phase quadrature. The 3 dB coupler is often made in microstrip technology where different quarter-wave sections are present to ensure impedance matching. In order to be able to design a duplexer operating on several frequency bands, a tunable hybrid coupler was designed in this work. The coupler must be adjustable to operate on the bands 3.3-3.6 GHz and 4.8-5 GHz. The proposed coupler will cover the bandwidth requirements of 5 bands (3.3-3.6 GHz) and (4.8-5 GHz) to be deployed in China. The hybrid coupler will be designed by two methods. At the first stage, the coupler will be designed by lumped elements, and then it will be designed using transmission lines. Via the ADS tool, the 3 dB 90° coupler is dimensioned and simulated to work well at the center frequency of 3.45 and 4.9 GHz. These two frequencies are belonging to the 5G bands. The main purpose of this work is to simulate and analyze the proposed coupler for 5G frequency bands. The simulation of the reflection coefficient, i.e., S11 parameters in amplitude and phase are presented and discussed. From simulation results we observed that the proposed coupler works under the requirement of 5G application.

“…Multi-function systems are emerging as a relevant solution for recent communications systems, to ensure reliable transmission. Among the most used systems are OFDM (Orthogonal Frequency Division Multiplexing) modulation [1,2], MIMO (Multi Input Multi Output) technique [3,4] and antennas [5][6][7]. These techniques give rise to new technologies, such as 4G, 5G or currently terahertz technology [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Equivalent Circuit Model for a 5G Microstrip Patch Antenna

Aghoutane¹,

Ghzaoui²,

Faylali³

et al. 2021

In recent years, we are witnessing an exponential development of new applications and technologies in the fields of health, media, industry, transport, energy. This evolution goes hand in hand with the emergence of new services related to a multiplication of connected objects. Faced with these challenges, a new revolution is coming with a new standard of mobile telecommunications systems, referred to as 5G technology. This work presents an investigation of an equivalent circuit model for a 5G microstrip patch antenna. The purpose of this paper is to model an antenna with electrical circuit. In this direction, the proposed antenna was designed by two methods then compared in term of S11. Firstly, the antenna was designed by HFSS (High Frequency Structure Simulator) software. Then, the same antenna was designed by an equivalent circuit by using the optimization tool in ADS (Advanced design system) software. The results obtained from the two softwares were compared in terms of the reflection coefficient, i.e., S11. It has been demonstrated that the results from ADS are in good agreement with those from HFSS. Other parameters are discussed in this paper such as VSWR (Voltage Standing Wave Ratio), E-plane and H-plane of the proposed antenna and real and imaginary part of input impedance of the proposed antenna. From simulation results, we can conclude that the proposed equivalent circuit is validated by mean of simulations.