This paper proposes an advanced technique to develop combined neural network and pole-residue-based transfer function models for parametric modeling of electromagnetic (EM) behavior microwave components. In this technique, networks are trained learn the relationship between pole/residues functions geometrical parameters. The order pole-residue may vary over different regions We a tracking solve order-changing problem. After proposed process, model can be used provide accurate fast prediction...

This article introduces the deep neural network method into field of high-dimensional microwave modeling. Deep learning is nowadays highly successful in solving complex and challenging pattern recognition classification problems. investigates use networks to solve modeling problems that are much more than solved by previous shallow networks. The most commonly used activation function existing rectified linear unit (ReLU), which a piecewise hard switch function. However, such ReLU not...

Yield-driven optimization is important in microwave design due to the uncertainties introduced manufacturing process. For first time, we extend this paper use of polynomial chaos (PC) approach from electromagnetic (EM)-based yield estimation EM-based structures. We formulate a novel objective function for yield-driven EM optimization. By incorporating PC coefficients into formulation, analytically related variables, which are nominal point. then derive sensitivity formulas with respect...

A low-profile microstrip antenna with stable radiation pattern in a relatively wide band is presented for 5G operation. Four resonant modes different frequencies are integrated single structure to enhance the bandwidth gain, and well matched by introducing folded walls. An impedance of 58.3% has been achieved from 2.84 5.17 GHz compact 0.84λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 0.68λ 0.06λ , where λ free-space wavelength at...

An ultra-wideband (UWB) 3.1- to 10.6-GHz low-noise amplifier (LNA) employing a common-gate stage for wideband input matching is presented in this paper. Designed commercial 0.18-mum 1.8-V standard RFCMOS technology, the proposed UWB LNA achieves fully on-chip circuit implementation, contributing realization of single-chip CMOS receiver. The 16.7plusmn0.8 dB power gain with good match (S11<-9 dB) over 7500-MHz bandwidth (from 3.1 GHz 10.6 GHz), and an average noise figure 4.0 dB, while...

BackgroundSexual transmission is the fastest growing route of HIV in China. We undertook this study to describe risk factors for infection female sex workers (FSWs), and determine commercial venues where FSWs are most at being infected with or infecting others HIV.MethodsThis was a cross-sectional 737 Kaiyuan City, Yunnan Province southern China, which took place from March May 2006.ResultsThe overall prevalence 10.3%, but varied venue 25.8% working on streets HIV-positive none nightclubs....

This paper proposes a pole-residue-based adjoint neuro-transfer function (neuro-TF) technique with electromagnetic (EM) sensitivity analysis for parametric modeling of EM behavior microwave components respect to changes in geometrical parameters. The purpose is increase model accuracy by utilizing information and speed up development reducing the number training data required developing model. proposed consists original pole-residue based neuro-TF models. New formulations are derived...

Space mapping (SM) is a recognized method for speeding up electromagnetic (EM) optimization. Existing SM approaches are mostly based on sequential computation mechanism. This paper proposes parallel EM In the proposed method, surrogate model developed in each iteration trained to match fine at multiple points simultaneously. Multi-point training and enables be valid larger neighborhood than that standard SM. The formulation of multi-point inherently suited implemented through computation....

This paper proposes a novel technique to develop low-cost electromagnetic (EM) centric multiphysics parametric model for microwave components. In the proposed method, we use space mapping techniques combine computational efficiency of EM single physics (EM only) simulation with accuracy simulation. The responses respect different values geometrical parameters in nondeformed structures without considering other domains are regarded as coarse model. is developed using modeling methods such...

A new Wiener-type dynamic neural network (DNN) approach for nonlinear device modeling is proposed in this paper. The analytical formulation of DNN structure consists a cascade simplified linear part and static part. equations are obtained by vector fitting enhancing the efficiency model. sensitivity analysis technique derived to train with dc, small- large-signal data. gradient-based training algorithm also formulated speed up model can be trained accurate relative Furthermore, provides...

This article proposes a multifeature-assisted neuro-transfer function (neuro-TF) surrogate-based electromagnetic (EM) optimization technique exploiting trust-region algorithms for microwave filter design. The proposed addresses the situation where response of starting point is far away from design specifications. We propose to utilize multiple feature parameters help move passband into range pole–zero-based neuro-TF introduced in this extract when responses are not explicitly identified....

This paper presents a novel technique for single slope analog to digital converter (SSADC) suppress the rowwise noise in CMOS image sensor. A sample switch is used current-steering DAC reduce introduced by bias circuits, which will deteriorate characteristic of uniformity row direction. The can fix voltage biases current source when generating ramp avoid fluctuation time domain. correlated double sampling non-uniformity column-level ADCs. sensor prototype fabricated 110nm 1P3M process....

In this paper, a novel bandwidth enhancement technique based on the combination of capacitive degeneration, broad-band matching network, and regulated cascode (RGC) input stage is proposed analyzed, which turns transimpedance amplifier (TIA) design into fifth-order low-pass filter with Butterworth response. This methodology for TIAs presented an example implemented in CHRT 0.18-mum 1.8-V RF CMOS technology. Measurement data shows -3-dB about 8 GHz 0.25-pF photodiode capacitance. Comparing...

A compact ultra-wideband (UWB) bandpass filter with an ultra narrow notched band is proposed using a hybrid microstrip and coplanar waveguide (CPW) structure. The CPW detached-mode resonator (DMR) composed of quarter-wavelength (¿/4) nonuniform short-stub ¿/4 single-mode (SMCR) can allocate three split frequencies at the lower end, middle, higher end UWB passband. conventional broadside-coupled microstrip/CPW structure introduced to improve bandwidth enhancement around frequencies, which...

A high selective bandpass filter and a isolation diplexer by using mixed electromagnetic coupling have been presented. The transmission zeros (TZs) are attributed to the coupling, additional resonators not required. TZs also can be adjusted controlling electric magnetic couplings. is fabricated measured, new design demonstrated measurement. has compact size of 0.483λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">g</sub> ×0.585λ , measured no...

With the rapid development of newgeneration communication technology such as multiple-input/multiple-output technology, ultrawideband communication, and 5G systems have higher requirements for quality signal transmissions. Achieving this requires attention not only to amplitude characteristics but also phase because long delays distortion that come with positive group delay (PGD). However, negative (NGD) circuits are an effective way compensate PGD decrease variability passband delay.

A range of frequencies supporting low path loss ducting over microwave links at beyond-line-of-sight distances beyond 100 km have been demonstrated theoretically and experimentally. Three experiments were conducted in the South China Sea to confirm operating frequency 8–12 GHz link 109 km, 63 87 respectively.