System Fidelity Factor: A New Method for Comparing UWB Antennas

Quintero, G.; Zürcher, J. F.; Skrivervik, Anja K.

doi:10.1109/tap.2011.2152322

Cited by 196 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To numerically evaluate the similarity between the transmitted and received pulses, the System Fidelity Factor, SFF, is obtained. This factor calculates the relationship between the energy of the convolution between the transmitted and received pulse and the energy of each pulse separately [39]. The expression for the calculation of the SFF is: Once the broadband pulse used for the evaluation of the time domain antenna characteristics has been selected, the pulse is transmitted in the two configurations studied, and the received pulse is analysed.…”

Section: Time Domain Analysismentioning

confidence: 99%

UWB-Printed Rectangular-Based Monopole Antenna for Biological Tissue Analysis

et al. 2021

View full text Add to dashboard Cite

This paper presents the design of a printed step-type monopole antenna for biological tissue analysis and medical imaging applications in the microwave frequency range. The design starts from a very simple and widely known rectangular monopole antenna, and different modifications to the antenna geometry are made in order to increase the bandwidth. The antenna dimensions are optimized by means of a parametric analysis of each dimension using a 3-D electromagnetic simulator based on the finite element method. The optimized antenna, with final dimensions of 40 × 36 mm2, is manufactured onto a low-cost FR4 (fiber glass epoxy) substrate. The characteristics of the antenna have been measured inside an anechoic chamber, obtaining an omnidirectional radiation pattern and a working frequency range between 2.7 GHz and 11.4 GHz, which covers the UWB frequencies and enables the use of the antenna in medical imaging applications. Finally, the behaviour of four of these antennas located around a realistic breast model, made with biocompatible materials, has been analysed with the electromagnetic simulator, obtaining good results and demonstrating the usefulness of the designed antenna in the proposed application.

show abstract

Section: Time Domain Analysismentioning

confidence: 99%

UWB-Printed Rectangular-Based Monopole Antenna for Biological Tissue Analysis

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Given that the propagation channel acts as a dispersive medium, pulse distortion should be considered at the system level, taking into account both transmit and receive antennas, as well as the wireless channel (Van den Brande et al, 2018). A useful figure of merit to express pulse distortion in the total localization system is the SFF (Quintero et al, 2011). For localization purposes, the SFF of the IR-UWB system is generally required to be larger than or equal to 90% for all relevant orientations of the receive antenna, with respect to the transmit antenna.…”

Section: Design Specificationsmentioning

confidence: 99%

“…Next, the orientation-specific pulse distortion of our all-textile antenna element is analyzed by means of the SFF, defined by Quintero et al (2011) as…”

Section: Time Domain Simulationsmentioning

confidence: 99%

“…In this paper, our all-textile UWB antenna element is used both as a transmit and receive antenna. Then, the procedure outlined in Quintero et al (2011) is exploited to calculate the antenna system's SFF when the receive antenna is rotated in its E-and H-plane, respectively, while the transmit antenna is transmitting along broadside. As an input pulse, the default output pulse of the Decawave DW1000 chipset when operating in Channel 2 is used.…”

Section: Time Domain Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

Foldable All‐Textile Cavity‐Backed Slot Antennas for Personal UWB Localization

et al. 2020

View full text Add to dashboard Cite

An all‐textile multimoded cavity‐backed slot antenna has been designed and fabricated for body‐worn impulse radio ultra‐wideband (IR‐UWB) operation in the 3,744–4,742.4 MHz frequency band, thereby covering Channels 2 and 3 of the IEEE 802.15.4a standard. Its light weight, mechanical flexibility, and small footprint of 35 mm × 56 mm facilitate integration into textile for radio communication equipment for first aid responders, personal locator beacons, and equipment for localization and medical monitoring of children or the elderly. The antenna features a stable radiation pattern and reflection coefficient in diverse operating conditions such as in free space, when subject to diverse bending radii and when deployed on the torso or upper right arm of a test person. The high isolation toward the wearer's body originates from the antenna's hemispherical radiation pattern with a −3 dB beamwidth of 120∘ and a front‐to‐back ratio higher than 11 dB over the entire band. Moreover, the antenna exhibits a measured maximum gain higher than 6.3 dBi and a radiation efficiency over 75%. In addition, orientation‐specific pulse distortion introduced by the antenna element is analyzed by means of the System Fidelity Factor (SFF). The SFF of the communication link between two instances of this antenna is higher than 94% for all directions within the antenna's −3 dB beamwidth. This easily wearable and deployable antenna is suitable to support IR‐UWB localization with an accuracy in the order of 5 cm.

show abstract

“…This indicates that although the FF value decreases as the signal propagates through the head, its level remains higher than 65%, up to 60 mm from the skin surface, which is suitable for imaging applications. 24…”

Section: Fidelity Factormentioning

confidence: 99%

Miniaturized on‐body antenna for small and wearable brain microwave imaging systems

Arayeshnia

Amiri

Keshtkar

2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A miniaturized inset‐fed on‐body meandered bowtie antenna designed for brain microwave imaging systems is presented in this article. The proposed on‐body antenna can contribute to the realization of a wearable and portable brain microwave imaging system. The size of 18 × 18 mm2 is achieved at a frequency range of 0.75 to 4 GHz by the simultaneous use of self‐complementary structures and meandered lines. The frequency band is a trade‐off between penetration depth and spatial resolution. The proposed antenna performance was studied at different positions on the human head voxel model in terms of several parameters such as reflection coefficient, near‐field directivity, and fidelity factor. In addition, the antenna bandwidth was surveyed on several volunteers using a wearable measurement setup. It has been found that the averages of measured reflection coefficients in different scenarios are in good agreement with the corresponding simulation results, and the antenna shows stable performance under different practical situations. The proposed antenna takes advantage of a small footprint and body matching, which make it an eligible choice for compact, portable, and wearable head microwave imaging systems.

show abstract

System Fidelity Factor: A New Method for Comparing UWB Antennas

Cited by 196 publications

References 13 publications

UWB-Printed Rectangular-Based Monopole Antenna for Biological Tissue Analysis

UWB-Printed Rectangular-Based Monopole Antenna for Biological Tissue Analysis

Foldable All‐Textile Cavity‐Backed Slot Antennas for Personal UWB Localization

Miniaturized on‐body antenna for small and wearable brain microwave imaging systems

Contact Info

Product

Resources

About