In this paper, a novel pattern reconfigurable antenna based on morphing bistable composite laminates is presented. The asymmetric glass-fiber reinforced polymer (GFRP) have two stable configurations with curvatures of opposite signs. reconfigured by transforming the configuration GFRP laminate which acts as substrate antenna. coplanar waveguide transmission lines feeding technique used for microstrip quasi-Yagi A prototype proposed fabricated using semi-automatic screen printer and an...

Remote sensing images play a crucial role in large-scale surveillance and data analysis. To address challenges monitoring managing external threats to power optical fiber communication networks, this study integrates remote for network inspection. It proposes an anti-external damage system networks based on image target detection. The enhances the YOLOv8 algorithm improved object detection utilizes linear threshold model with specific risk factors analyze establish robust anti-breakout...

Diabetic foot neuropathy (DFN) is a critical factor leading to diabetic ulcers, which one of the most common and severe complications diabetes mellitus (DM) associated with high risks amputation mortality. Despite its significance, existing datasets do not directly derive from plantar data lack continuous, long-term foot-specific information. To advance DFN research, we have collected novel dataset comprising continuous pressure recognize neuropathy. This includes 94 DM patients 41 without...

This letter proposes a novel wideband crossed-dipole antenna that utilizes liquid metal switches for polarization reconfiguration. The consists of single-fed crossed bowtie dipole with each arm featuring gradually varying width bent slot. A back cavity structure serves as reflector to achieve directional radiation and circular (CP) bandwidth enhancement. proposed uses movable columns in microchannels coupling open or close the slots. By controlling either vertical horizontal slots, achieves...

Plasma-added intensification of radio frequency (RF) signals toward the future generation compact antennas with wide-range requests has been studied experimentally in this paper. A technology based on modulation and enhancement effects subwavelength plasma structures application-focused RF electromagnetic radiation is developed. An inductively coupled applied to provide appropriate structures, aiming at enhancing an omnidirectional ellipse dipole antenna. The mediated antenna ~1 GHz observed...

A compact ultra‐high‐frequency (UHF) antenna is developed in this work. First, by means of shifting symmetrical octagonal monopole into asymmetrical one, the impedance matching performance at high frequencies improved; then, cutting radiation patch and ground plane part, reduced 37.9% size while maintaining its bandwidth; finally, a Γ‐shaped slot on utilised to create an additional resonance, decreasing low cutoff frequency without enlarging volume. The proposed only occupies 124 mm × 77 1.6...

A semi-circle monopole printed antenna is proposed. Its radiation unit and the ground plane are in same shape, both of them coplanar-printed. The fed by a microstrip line, which connected to through via-hole. measured impedance bandwidth about 3.1GHz{15.1GHz with VSWR < 2, ratio can reach 4:9 : 1. omnidirectional characteristic also excellent H-plane. Moreover, because introduction plane, length be miniaturized polarization direction, only 14% wavelength lowest operating frequency. size just...

A printed director antenna with compact structure is proposed. The fed by a balanced microstrip-slotline and makes good use of space to reduce feeding network area the size antenna. According simulation results CST MICROWAVE STUDIO software, broadband characteristics directional radiation properties are explained. operating bandwidth 1.8 GHz–3.5 GHz reflection coefficient less than −10 dB. Antenna gain in band can achieve 4.5–6.8 dBi, overall smaller than<mml:math...

A novel pattern reconfigurable planar optically controlled Yagi–Uda antenna is proposed. The comprises a director, driven dipole, reflector and the substrate. two parasitic elements loaded with positive intrinsic negative (PIN) photodiodes in middle, applied as manipulating switches, are capable of varying radiation by transforming their physical structures. prototype proposed along PIN was fabricated to verify concept reconfiguration. simulated experimental results indicate that curves...

A miniaturized printed log-periodic fractal dipole antenna is proposed. Tree structure introduced in an design and evolves the traditional Euclidean array into second-iteration tree-dipole (LPT 2 DA) for flrst time. Main parameters characteristics of proposed are discussed. fabricated proof-of-concept prototype etched on a FR4 substrate with relative permittivity 4.4 volume 490mm £ 245mm 1:5mm. The impedance bandwidth (measured VSWR < 2) approximate 40% reduction from 0.37 to 3.55GHz ratio...

This paper presents a wideband pattern- and polarization-reconfigurable antenna based on bistable composite cylindrical shells. antenna, which includes seven radiating metal strips, uses anti-symmetric glass fiber-reinforced polymer (GFRP) shells as the substrate to achieve reconfigurability without need for redundant structures or semiconductor devices. GFRP has two stable configurations: extended structure coiled-up structure. Therefore, by transforming configuration, radiation patterns of...

This paper presents the research on a novel miniaturized printed log-periodic antenna with fractal tree structure for operation in broadband of 0.4 GHz-2GHz. The is designed and simulated application CST MICROWAVE STUDIO <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> software based Finite Integral Method. simulation results show that achieves necessary lateral size reduction to 61% normal antenna, while keeping its radiation...

In this paper, an ultra-wideband (UWB) printed dipole antenna with semicircular dipoles is presented. A balanced microstrip line used for feeding the antenna. By introducing loading disc, ultra wide frequency band from 3.2GHz to 15.6GHz VSWR < 2 obtained. Through analyzing surface current of antenna, equivalent array radiation models standing wave and traveling are These can well explain antenna's characteristic, which matches measured results well.

A printed omnidirectional dipole array antenna with a radiated load is proposed and analyzed, which fed by coplanar waveguide. Flying lines via-holes are used to connect dipoles achieve balanced feed. Simulated results CST microwave studio <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> indicate that the operating band 4.6 4.9 GHz its reflection coefficient less than -10 dB. The gain in this higher 4.23 dB size only 103.4mm × 12.6mm...

A new plasma monopole antenna is proposed in this paper. The cylindrical fed by a metal ring. impedance characteristics and radiation of the are calculated analyzed. According to actual situation, designed measured. measurement results similar calculation results.

Abstract This article presents a pattern‐and frequency‐reconfigurable antenna based on movable liquid metal. The proposed mainly consists of printed three‐element Yagi‐Uda structure whose two parasitic elements are loaded with slots in the middle. Six metal poles filled microfluidic channels, which adhered to surface three radiating arms antenna. By moving these poles, can be shorted or opened and equivalent electrical lengths director fed‐dipole changed, thus adjusting radiation pattern...

The integrative design of scattering and radiation characteristics antennas is great practical significance for modern wireless communication. In this work, from the perspective separate cooperative modes, we comprehensively discussed possibility simultaneously harmoniously implementing suppression enhancement an electrically small antenna by subwavelength plasmas. For mode where two functions are decoupled based on a two-layer structure, it shown that overdense–underdense core–shell density...

In order to obtain broadband and high-gain, a sort of planar printed quasi-Yagi antenna element array, which operating in S-band, are proposed. The can be divided into two parts: the feeding unit radiation unit. Effects major parameters on performance simulated studied through electro-magnetic simulation, optimal design has been obtained. addition, binary array based is devised enhance gain. Prototype antennas according simulation results have fabricated measured. Experimental show that...

A circular polarization microstrip antenna with a single feeding point is designed in this paper.The patch has structure of Koch fractal edges, and the realized by inspiring two degenerate modes that are orthogonal to each other.The software CST MWS R used simulate antenna.The simulation results indicate radiation could be achieved though at one diagonal lines probe.Antennas considering substrate medium loss also simulated, approximate those ideal substrates.According simulated surface...

A non-cross-fed printed log-periodic antenna is simulated and studied experimentally. To avoid complex feeding with long coaxial line, the non-cross-feeding structure applied in this antenna. The software CST Microwave Studio employed to simulate proposed antenna, optimized model obtained. According simulation results, prototype produced measured. Simulation measured results show that with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mfenced open="|" close="|"...

A kind of novel multiband monopole antenna with square-nested fractal is proposed and designed, which nested a series similar square elements. The antennas can synchronously operate in multiple frequencies, covering the four required 2.4GHz/3.5GHz/5.2GHz/5.8GHz, for WLAN/WiMAX application. surface currents are simulated by CST Microwave Studio <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">®</sup> , 3-dimension full-wave electromagnetic...

The simplicity and intuitive design of traditional planar printed quasi-Yagi antennas has led to its widespread popularity for good directivity. In this paper, a Quasi-Yagi antenna with 3 directors 1 concave parabolic reflector, operating in S-band, is proposed. impedance radiation characteristic are simulated CST-Microwave Studio, the fabricated measured. measured results indicate that which operates at 2.25-2.63GHz can achieve an average gain 9.45 dBi within frequency range, especially...

In this study, a broadband and high gain dielectric‐rod end‐fire antenna are proposed for applications on both the K Ka bands. By employing double‐ridged waveguide (DRW) feeding structure which is composed of coaxial line to tapered DRW transition, parabolic DRW, parabolic‐tapered flared parallel section, impedance bandwidth broadened 84.5%. The with double circular truncated cone acted as main radiator adopted achieve higher gains lower side‐lobe levels compared traditional dielectric‐rod,...

In the giga-Hz (GHz) regime, not only does an advanced electromagnetic platform need a stealth function to shield itself from radar detection, similar “invisible” cloak in visible light but also enhanced transmission communicate with others. To satisfy seemingly contradictory requirements, we here propose multi-functional mode of plasma cloaking, invisible detection signal-enhanced communication bands. Such synergistic effect is achieved by combining “detour” layer cloaking and enhancement...

A high-gain and broadband printed Yagi-Uda antenna is proposed. The microstripline-to-balance microstripline technique adopted in the feeding mode of active dipole, which can help to realize balanced-unbalanced transformation. ground microstrip line function as a re∞ector, both longer re∞ector shorter director also achieve wideband. By altering area substrate, gain be efiectively improved. operating at 3.5GHz has been designed manufactured. Both simulated measured results indicate that there...