An active integrated broadband photonics multi-beamformer using optical true-time delay induced Blass matrix is designed and demonstrated. The constructed on a standard silicon-on-insulator platform, incorporating on-chip modulator array photodetector alongside multi-beamforming network. network utilizes architecture based to precisely control the power of input microwave signals. Furthermore, wavelength division multiplexing technology achieved by multi- lasers used decouple signals from...

Programmable metasurface (PM) exhibits powerful capabilities to manipulate electromagnetic (EM) waves with controlled active components loaded on the sub wavelength elements. However, for electrically large complex structures, it is difficult implement fast mapping from codes, i.e., states of components, radiation patterns and vice versa. In this article, artificial neural networks are employed realize code-to-pattern (C-P) pattern-to-code (P-C) accurately efficiently. As C-P mapping, a...

A programmable metasurface based on a substrate-integrated waveguide (SIW) is proposed to realize dynamic-pattern antenna, which satisfies the critical needs of low cost, ease manufacturing, and easy integration with planar circuits in real-life applications. The consists 16 elements complementary electric- <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> resonators that are etched top layer SIW. Each element installed two p-i-n diodes...

Diameter at breast height (DBH) is the main metric for standing tree growth measurements. Developing fast and efficient measurement devices measuring DBH of great values in forest resource surveys. In this paper, we propose a new diameter instrument developed using self-reset displacement sensor, which equipped with Personal Computer (PC) terminal to enable measurement, transmission, storage, analysis diameters one. The measurements showed an overall bias 1.44% accuracy 97.35% compared...

A high-performance electromagnetic interference shielding film contains PNIPAM@void@PS@Ti 3 C 2 T x nanocomposite microspheres, whose maximum EMI SE value of the reaches 72 dB at 9.5 GHz with a thickness 25 μm.

A single-event burnout (SEB)-hardened design based on a 600 V lateral double-diffused metal-oxide-silicon with an optimal trench drain (TD-LDMOS) is proposed in this article. By electro-thermal coupled simulations 2-D technology computer-aided device simulator, the SEB triggering mechanisms are numerically studied. Simulation results show that regenerative feedback between avalanche breakdown and false opening of source parasitic NPN leads to secondary thermal device. With introduction (TD),...

Excitation-inhibition (E-I) balanced neural networks are a classic model for modelling activities and functions in the cortex. The present study investigates potential application of E-I fast signal detection brain-inspired computation. We first theoretically analyze response property an network, find that asynchronous firing state network generates optimal noise structure enabling to track input changes rapidly. then extend homogeneous connectivity include local neuronal connections, so can...

In this communication, a dual-polarized coding reconfigurable array (coding RA) antenna with the characteristics of being low-profile, low-cost, relatively low-sidelobe, and wide-angle beam scanning is proposed. By exciting via different feeding ports, horizontal- vertical-polarized beams can be generated. adjusting p-i-n diodes integrated on lines, element presents four phase states −270°, −180°, −90°, 0°, labeled as "00," "01," "10," "11." An eight elements designed based element. With...

In this article, an <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$8\,\,{\times }$ </tex-math></inline-formula> 8 array with 2-D wide-angle scanning is proposed and studied. By integrating two p-i-n diodes on the feeding line, radiated electric field of element can present different phase states 0° −180°. introducing elaborately designed groups fixed delay (FPD) in horizontal vertical directions, grating...

The diameter at breast height (DBH) and location of trees are important factors when surveying forest resources ecological functions. In this study, a device mainly comprising self-made DBH-measuring instrument positioning base station was used. hardware consisted two devices to simultaneously measure the DBH within sample plot. Specifically, is acquired by processing angle data with an algorithm, locations obtained five-sided ranging algorithm based on received signal strength indicator...

Strategically located between the thalamus and cortex, inhibitory thalamic reticular nucleus (TRN) is a hub to regulate selective attention during wakefulness control cortical oscillations sleep. A salient feature of TRN neurons contributing these functions their characteristic firing patterns, ranging in continuum from tonic spiking bursting spiking. However, dynamical mechanism under behaviors not well understood. In this study, by applying reduction method full conductance-based neuron...

This letter proposes a novel ultra-wideband (UWB) bandpass filter with compact size and high-selectivity performance. The has been studied implemented through multiple-mode resonator (MMR) using new coupling schemes such as capacitive source-load (S-L) coupling/inductive coupling. By properly adjusting the length width of these stubs, its first four resonant modes can be allocated within 3.1-10.6 GHz passband, whereas fifth mode is placed above 16.0 GHz. Two transmission zeros (an inherent...

Access control vulnerabilities that lead to elevated privileges are among the most dangerous in Web applications. Most of existing detection methods use dynamic or static analysis techniques alone, which suffer from high manual involvement, low automation, leakage rate, page coverage, and other deficiencies. To this end, paper proposes a novel access vulnerability method (DetAC) based on sitemap model with global information representation. This first constructs site-wide link addresses...

Spindle oscillation is a waxing-and-waning neural observed in the brain, initiated at thalamic reticular nucleus (TRN) and typically occurring 7-15 Hz. Experiments have shown that adult electrical synapses, rather than chemical dominate between TRN neurons, suggesting traditional view of spindle generation via synapses may need reconsideration. Based on known experimental data, we develop computational model network, where heterogeneous neurons are connected by synapses. The shows interplay...

Tree diameter at breast height (DBH) can visually reflect the size of trees and is closely related to forest carbon sinks. As its continuous change affected by growing environment, it an important indicator for surveys, great value economy microecological research. In order realize accurate digital measurement tree height, this paper develops a low-power device based on magneto-resistive effect. Compared traditional method measurement, has advantages real-time transmission data, low-cost,...

In this paper, the S parameters of a single coupler are extracted from whole slow-wave-structure (SWS) system. The basic theory is derived. simulation model built up based on helix SWS in code CST Microwave Studio. system simulated. obtained derived theory. results can be used to evaluate match characteristics

In the past decades, interpretability of neural network has gradually become a research hotspot in fields deep learning, and method combining physical model with is one its directions. this paper, coded antenna radiation pattern prediction based on DDA algorithm(ARPN-DA) been purposed, which replaces part approximate calculation network. Then, it realizes under condition small samples few parameters. Compared pure DNNs, new system does not rely massive datasets inter-pretabilitiy. We have...

This paper proposes an intelligent beamforming architecture to predict the mapping relationship between codes and three-dimensional patterns. First, two-dimensional (IB) framework is proposed. Then, one-dimensional realize fast calculation of P-C C-P presented. The IB includes: 1) Substrate integrate waveguide programmable metasurface automatic measuring systems design, 2) prediction from patterns, 3) real-time patterns codes, architecture. Finally, proposed validated by measured results.

In this paper, the ridge-loaded helix slow-wavestructure (SWS) used in microwave power module (MPM) is presented. Based on finite vane model, loaded ridge and support rod are equalized to sector waveguides with regard tape thickness. The dispersion characteristic equation newly derived. calculation results meet measurements very well.

In this paper, the coupler of traveling-wave tube (TWT) is designed to be used in microwave power module (MPM). The stepped-impedance technology employed minimize size. length decreased about one half. simulation results meet measurements very well.

The biggest difference between characteristic towns and ordinary lies in the grasp of their own cultural characteristics cognition key factors sustainable development. Therefore, for turquoise town Zhushan County, Hubei Province, we should take excavation integration resources application as top priority planning construction, build into a multi-cultural feature with resources, localization, creativity experience, so to overcome limitation non renewable Turquoise promote development town.

In this paper, a PIN dioded loaded programmable metasurface element and dynamic apeture has been proposed. The element-a complementary electric LC (cELC) resonator is patterned into the microstrip transmission line. Two diodes are integrated across capacitive gap of cELC element, digital states each coding can be controlled in real time by changing diodes. proposed aperture potential applications beamforming, electromagnetic imaging, security check.

In this paper, We present a numerical technique for predicting the far-field pattern of slotted waveguide antennas based on an adaptation form discrete dipole approximation (DDA). By using method, we can predict radiation with different congurations. The capabilities proposed method are verified by demonstrating excellent agreement between DDA and full-wave solver HFSS. has potential application value in feilds beamforming microwave imaging.