Search for high-performance probe-fed stacked patches using optimization

Mitchell, Arnan; Lech, M.; Kokotoff, D.M.; Waterhouse, R.B.

doi:10.1109/tap.2003.809070

Cited by 22 publications

(12 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instead of the neural network approach proposed in [12], a global optimization algorithm based on simulated annealing [39] was used to determine the weight associated with each SVM.…”

Section: Methodsmentioning

confidence: 99%

Detection of Clinical Depression in Adolescents’ Speech During Family Interactions

Low¹,

Maddage²,

Lech³

et al. 2011

IEEE Trans. Biomed. Eng.

203

View full text Add to dashboard Cite

The properties of acoustic speech have previously been investigated as possible cues for depression in adults. However, these studies were restricted to small populations of patients and the speech recordings were made during patients’ clinical interviews or fixed-text reading sessions. Symptoms of depression often first appear during adolescence at a time when the voice is changing, in both males and females, suggesting that specific studies of these phenomena in adolescent populations are warranted. This study investigated acoustic correlates of depression in a large sample of 139 adolescents (68 clinically depressed and 71 controls). Speech recordings were made during naturalistic interactions between adolescents and their parents. Prosodic, cepstral, spectral, and glottal features, as well as features derived from the Teager energy operator (TEO), were tested within a binary classification framework. Strong gender differences in classification accuracy were observed. The TEO-based features clearly outperformed all other features and feature combinations, providing classification accuracy ranging between 81%–87% for males and 72%–79% for females. Close, but slightly less accurate, results were obtained by combining glottal features with prosodic and spectral features (67%–69% for males and 70%–75% for females). These findings indicate the importance of nonlinear mechanisms associated with the glottal flow formation as cues for clinical depression.

show abstract

“…Instead of the neural network approach proposed in [12], a global optimization algorithm based on simulated annealing [39] was used to determine the weight associated with each SVM.…”

Section: Methodsmentioning

confidence: 99%

Detection of Clinical Depression in Adolescents’ Speech During Family Interactions

Low¹,

Maddage²,

Lech³

et al. 2011

IEEE Trans. Biomed. Eng.

203

View full text Add to dashboard Cite

show abstract

“…The antenna has a slotted circular patch, a parasitic circular patch on the top layer and showed a 25% relative bandwidth. In [16] using probe-fed stacked circular patches and optimization of the dielectric constants of the two substrates it was found that bandwidths up to 30% can be achieved. The lower patch is probe-fed with high dielectric constant substrate while the upper one is capacitively coupled through.…”

Section: Extended-bandwidth Microstrip Circular Patch Antenna For Duamentioning

confidence: 99%

“…However, bandwidth expansion is achieved on the account of increased thickness. The antenna in [16] has thickness of 31% of the circular patch diameter leading to a large antenna volume.…”

Section: Extended-bandwidth Microstrip Circular Patch Antenna For Duamentioning

confidence: 99%

“…The obtained results of the proposed Antenna-I and Antenna-II are compared with those of the antennas presented in [1][2][3][4][5][6][7][8][9][10][11], [14][15][16], [21]. The comparison takes into consideration the total substrate dimensions and the volume of the antenna, frequency range, bandwidth, gain, as shown in Table 4.…”

Section: Comparison With Other Workmentioning

confidence: 99%

See 1 more Smart Citation

Extended Bandwidth Microstrip Circular Patch Antenna for Dual Band Applications

Majeed

Sayidmarie²

2018

IJECE

View full text Add to dashboard Cite

This paper presents a new wideband microstrip circular patch antenna (MCPA) fed by proximity-coupled line with double-stub matching to achieve dual-band operation. Bandwidth extension is achieved by exciting higherorder modes in the circular radiating patch, and using two stubs to achieve adequate matching across the obtained two bands. The characteristics of the antenna such as reflection coefficient, impedance bandwidth, gain and radiation pattern are investigated and optimized through parametric studies using the CST Microwave Studio Suite. The antenna achieved a large relative bandwidth of 45.16% at the upper band, while the lower one has 10.3% relative bandwidth. The maximum achieved gain of the dual-band antenna in the 5.8GHz band is 4.62dBi while it is 4.85dBi in the upper band. The antenna has an overall size of 30×30×3.2mm3 corresponding to 0.58λ × 0.58 λ × 0.062 λ at the lower band of 5.8 GHz. The proposed antenna should be useful for WLAN and X-band communication systems.

show abstract

“…Multilayer and stacked forms of antennas are one type of that, which are capable to deliver the desired characteristics like broad bandwidth, dual-and multifrequency behavior etc. [1][2][3][4][5][6]. Commercial and freeware computer aided design (CAD) models are available for the analysis of stacked patch antennas.…”

Section: Introductionmentioning

confidence: 99%

Neurocomputational Analysis of Coaxial Fed Stacked Patch Antennas for Satellite and Wlan Applications

Jain¹,

Jain²

2013

PIER C

View full text Add to dashboard Cite

Abstract-This paper presents a neural network based technique for the analysis of various stacked patch antennas, those can be applied for satellite and wireless local area network (WLAN) applications. In order to show the diversity of artificial neural network (ANN) modeling technique, two different trained neural networks were developed with different number of antenna geometrical parameters as inputs. These trained networks locate the operational resonance frequencies with their bands for stacked patch antennas (SPA) operating in the XKu (8 GHz-18 GHz) bands and WLAN bands (2 GHz-6 GHz). These frequency bands are useful for satellite communication and indoor wireless communication applications respectively. First ANN model takes design (geometrical) parameters of antenna like lower patch dimension, upper patch dimension, and height of air gap, as a input, whereas other NN model includes feed point location also as a input. The validity of the network is tested with the simulations results obtained from the full-wave Method of Moment (MoM) based IE3D and few experimental results obtained in the laboratory.

show abstract

Search for high-performance probe-fed stacked patches using optimization

Cited by 22 publications

References 19 publications

Detection of Clinical Depression in Adolescents’ Speech During Family Interactions

Detection of Clinical Depression in Adolescents’ Speech During Family Interactions

Extended Bandwidth Microstrip Circular Patch Antenna for Dual Band Applications

Neurocomputational Analysis of Coaxial Fed Stacked Patch Antennas for Satellite and Wlan Applications

Contact Info

Product

Resources

About