Plant stress monitoring is of crucial importance to understand the plant response environmental conditions, and has been widely applied in various fields including biology, agronomy, botany, horticulture. A number methods instruments for have proposed, most which show significant disadvantages such as high cost, poor accuracy or complex operation that limit use devices. In this paper, we propose a low portable active multispectral optical device precise detection field mapping named...

Due to the global water crisis, there is a strong need for real-time quality monitoring with high temporal and spatial resolutions. This article presents an economical multiparameter system continuous of fresh waters. It based on sensor node that integrates turbidity, temperature, conductivity sensors, miniature 18-channel spectrophotometer, detection thermotolerant coliforms, which major novelty system. influence impurities measurement heuristic method has been developed mitigate this...

In this paper, we propose a novel microstrip-ridge gap waveguide (MS-RGW) filter configuration, which is based on cavity resonators with mushroom inclusions. The are realized as defects in surrounding mushroom-based perfect magnetic conductor (PMC), and thus, the configuration does not require additional conductive layers nor rearrangement of PMC elements. hosting MS-RGW fed through transition from SMA to microstrip ridge, enabling simple fabrication excellent impedance matching wide...

This paper presents an autonomous robotic system, unmanned ground vehicle (UGV), for in-field soil sampling and analysis of nitrates. Compared to standard methods it has several advantages: each sample is individually analyzed compared average in methods; georeferenced, providing a map precision base fertilizing; the process fully autonomous; samples are real-time, approximately 30 min per sample; lightweight less compaction. The system modules: commercial platform, anchoring module,...

In this article, we propose a novel microfluidic microstrip electromagnetic band gap (EBG) sensor realized using cost-effective 3D printing technology. Microstrip allows monitoring of the fluid properties flowing in microchannel embedded between line and ground plane. The sensor's operating principle is based on phase-shift method, which characterization at single frequency 6 GHz. defected structure as pattern plane to improve sensitivity. designed channel fabricated fused deposition...

The connection of macrosystems with microsystems for in-line measurements is important in different biotechnological processes as it enables precise and accurate monitoring process parameters at a small scale, which can provide valuable insights into the process, ultimately lead to improved control optimization. Additionally, allows continuous without need manual sampling analysis, leading more efficient cost-effective production. In this paper, 3D printed microfluidic (MF) chip glucose...

In this paper, we propose a novel 0 dB forward-wave coupler realized in microstrip-ridge gap waveguide technology. The is based on two microstrip-ridges coupled through an array of mushroom inclusions. A detailed design procedure presented including the hosting PMC structure, and coupler. proposed structure represents first It characterized by high coupling level 0.3 at 13.54 GHz, 0.48 variance over bandwidth 26%. Also, good performances terms isolation directivity have been achieved.

We study a waveguide structure supporting acoustic spoof plasmon polaritons (aSSPPs) perturbed by defect, whose specifically tailored geometry enables controllable transmission characterized uniform phase distribution and very steep narrowband response. The is analyzed using transmission-line theory numerical simulations, providing evidence for its use in advanced filters, isolators sensor technology. In order to demonstrate the applicability of aSSPP with two selective filter designs are...

In this paper, we propose a novel metamaterial-based microfluidic sensor that permits the monitoring of properties fluid flowing in reservoir embedded between composite left–right handed (CLRH) microstrip line and ground plane. The sensor’s working principle is based on phase shift measurement two signals, referent one guided through conventional signal CLRH line. At operating frequency 1.275 GHz, supports electromagnetic waves with group velocities are antiparallel, therefore “advance”...

Low temperature co-fired ceramics (LTCC) have shown to be one of the most admirable materials in high-frequency components design ([1], [2]). dielectric losses and applicability highly conductive are making them desirable production high quality passive components, often capacitors inductors. These reasons that made this technology attractive for circulator fabrication, present core paper. Bosma type with Y-junction configuration is topic work intended use at 5 GHz. Field analysis was...

In this paper, the design procedure of a compact dual-band bandstop filter (DBBSF) based on coupled open-ended Hilbert lines is proposed. The proposed topology consists two pairs bended in shape fractal curves and stepped-impedance line section (SIS). that manner, tree transmission paths are crated allowing independent control characteristic both bands. To obtain appropriate coupling between resonators, center frequencies in-band characteristics filter, SIS introduced as matching section....

In this paper novel miniature microwave soil moisture sensors based on band-stop structures have been developed, which operate at a fixed single frequency. Sensors were designed in microstrip technology for use wireless sensor networks measurement and mapping of arable lands. detect transmission coefficient phase delay is function the permittivity that turn direct relation with moisture. Two are proposed 2.54 GHz 2.75 GHz. Both solutions offer two times wider ranges from three to almost...

Abstract In the last decade, biocidal materials have been extensively researched and applied as a coating for various touchscreen devices, in medicine civil engineering. This research addresses important practical issues application of surface- modified glass water, inspects optical properties spectral range between 350 nm 500 nm, bacteria fluorescence detection. Testing efficiency has conducted an environment rich with microorganisms algae. To incorporate silver ions soda lime plates,...

In this paper we propose a grounded open-loop resonator which exhibits dual-mode behaviour. The proposed is analysed in detail and then used to design two microstrip bandpass filters: single-band filter operating at 3.5 GHz dual-band 2.4/5.2 GHz. Both filters are characterized by good performance small size.

In this paper we propose a compact tri-mode asymmetric resonator that consists of single-mode and dual-mode resonator. The behaviour the proposed configuration is analyzed in detail. To demonstrate potential resonator, tri-band bandpass filter operating at 2.4/3.5/5.2 GHz has been designed, fabricated measured. characterized by good performances very size only 0.24λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">g</sub> × 0.115λ .

Due to the global water crisis there is a strong need for real-time quality monitoring with high temporal and spatial resolution. This paper presents an economical multiparameter system continuous of fresh waters. It based on sensor node that integrates turbidity, temperature, conductivity sensors, miniature eighteen-channel spectrophotometer, detection thermotolerant coliforms, which major novelty system. influence impurities measurement heuristic method has been developed mitigate this...

In this paper, we present four sensors for agriculture and environmental applications, which are based on different sensing concepts including microwave microfluidics, nanomaterials, fluorescence method. The configurations working principles of the proposed explained. solutions characterized by good sensitivity selectivity, as well simple design cost-effective fabrication. Also, very compact two them have been realized portable devices.

Abstract In the last decade, biocidal materials have been extensively researched and applied as a coating for various touchscreen devices, in medicine civil engineering. This research addresses important practical issues application of surface- modified glass water, inspects optical properties spectral range between 350 nm 500 nm, bacteria fluorescence detection. Testing efficiency has conducted an environment rich with microorganisms algae. To incorporate silver ions soda lime plates,...