This paper investigates an innovative negative group delay (NGD) theory of "li" geometrical shape topology. The li-topology is outstandingly simple and fully distributed circuit comprised a coupled line (CL). li S-parameter model taking into account the CL coupling coefficient, attenuation established. NGD analysis showing possibility to generate condition with respect topology parameters developed. characteristics as value, center frequency, bandwidth, transmission reflection coefficient...

This paper introduces an original study of low-pass (LP) negative group delay (NGD) circuit.The family the proposed passive network cross-topology was rarely investigated in literature.It acts as a tri-port circuit presenting cross-shaped topology.The present is originally based on S-matrix modelling.The identification method LP-NGD function type established.The considered topology innovatively constituted by resistorless LC-passive network.Thanks to impedance 3-D matrix modelling,...

This paper develops a new reconstruction technique of undesirable signal distortion generated by sensor electronic circuits. The introduced is originally realized with unfamiliar low-pass negative group delay (NGD) function. feasibility condition the proposed in function spectrum bandwidth under consideration elaborated. principle theoretically means identification NGD parameters and appropriated circuit topology. analysis synthesis equations are established. As an example, for study,...

Abstract The negative group delay (NGD) is one of less familiar electronic functions. So far, the time domain (TD) experimentation NGD circuits remains a challenging task. This paper investigates an innovative TD measurement band‐pass (BP) passive circuit. topology considered BP distributed circuit constituted by transmission line structure having 101O‐geometrical shape introduced. After design description 101O‐structure, response illustrates from simulation and based on S‐parameters. center...

This paper develops an innovative model of bandpass (BP) negative group delay (NGD) inverted arm topology parallel lines. The S-matrix is established from impedance and admittance matrix operations elementary transmission lines constituting the topology. Parametric analysis performed to assess influence structure sizes on BP NGD specifications. To validate theoretical concept, a proof concept designed in microstrip technology. calculated simulated results are very good agreement. value,...

A negative group delay (NGD) design of a turtle shape circuit topology is developed in this brief. The comprised two different length transmission lines (TLs) interconnecting identical coupled (CLs). S-matrix model established as function the TL and CL parameters. (GD) at half wave frequency short interconnect derived from coefficient. To verify relevance proposed theory, microstrip proof concept was modeled, designed, simulated, fabricated, tested. calculated, simulated measured results are...

The unfamiliar negative group delay (NGD) circuit is the less familiar function for most of RF and microwave design engineers. Among existing types, bandpass (BP) NGD type circuits are convenient wireless communication technology. Therefore, it particularly important to explore different topologies operating as BP-NGD function. An innovative topology constituted by defected ground structure (DGS) with complementary split ring resonator (CSRR) developed in present paper. DGS-based method...

The energy-efficient data aggregation in Wireless Sensor Networks (WSNs) has grown as one of the promising area many applications. Prior research works have suggested several spatio-temporal models for effectively reducing collection costs, but are limited to their specificity. This paper presents a pre-filtration method every sensor node. While using techniques on node's pre-processing can suppress huge amount redundant or correlated transmissions, thus maximizes nodes battery lifetime....

A theoretical investigation of distributed microwave circuit built with Ti-shape topology is developed. The under study consists neighbored T- and i-shape interconnect lines. Ti-topology equivalent S-matrix calculated as a function crosstalk coupling coefficient coupled line (CL) delay. To highlight the NGD modelling feasibility, parametric analyses respect to i-element delay are introduced. More practical validation carried out designed, simulated measured microstrip prototype. It found...

This paper develops an original circuit theory of energy and data transition. The modelling signal hybrid receiver (SEHR) is developed. SEHR topology described in function the constituting coupled line (CL) a transmission (TL) performed with unfamiliar arbitrary load values. equivalent S-matrix versus electrical parameters established. analysis enables to predict transmitted power also optimal condition zero reflection terminal loads. validity analytical model verified commercial tool...

Purpose The aim of this paper is to provide the theoretical conceptualization a bandpass (BP) negative group delay (NGD) microstrip circuit. main objective theorization particular geometry circuit with experimental validation NGD effect. Design/methodology/approach methodology followed in work organized three steps. A model established equivalent S-parameters using Y-matrix analysis. GD analysis also presented by showing that presents possibility generate function around certain frequencies....

Wake-up radio (WuR) system is often presented as the best candidate for replacing traditional duty cycled Medium Access Control (MAC) protocols in Wireless Sensor Networks (WSNs). The Double Radio (DoRa) protocol a new MAC in-band WuR with addressing capabilities. While DoRa improves WSNs energy efficiency, it still suffers from an overhearing problem when very requested. wastes noticeable amount of to wake-up demand intended other nodes, but neither measured nor solved works. In this paper,...

This paper presents the DoRa protocol, which is a new cross-layer protocol for handling double radio of nodes in wake-up scenario. The implementation details OMNET++/MiXiM are also given, with focus on implemented MAC layers. main goal to reduce energy consumption wireless sensor network, by taking full advantage passive scheme. performance then evaluated and results compared B-MAC IEEE 802.15.4 protocols.

Summary Despite the performed progressive research work, interpretation of negative group delay (NGD) function remains not familiar to non‐specialist design and fabrication circuit engineers. The functionality misunderstanding limits NGD applications compared other classical electronic functions. present paper deals with a tunable by operating positive behaviors. topology using low‐pass (LP) type is described. formulas for calculating resistor capacitor parameters from desired are expressed....

Energy efficiency is an active research area in WSNs technology. There extensive work going towards this direction and existing mechanisms fail to address the problem completely due its limited specificity. This focuses on idea of enhancing network lifetime basis cluster-heads (CHs) remaining energy levels. Thus, instead changing CHs at every round for dynamic clustering, we propose two sorts CH threshold function as optimal range maximizing lifetime. Simulation results show that our...

Radio signal strength measurement systems are essential to build a Frequency (RF) mapping in indoor and outdoor environments for different application scenarios. This paper presents an autonomous robot making the construction of radio mapping, by collecting forwarding useful information related all access point devices inherent towards base station. A real case scenario is considered measuring RF field from our department network. The consistency shown fitting measurements with model...

A measurement technique for an indoor/outdoor radio signal mapping based on remote sensing through a mobile robot is provided. The autonomous and able to provide its actual location in relation initial position. data are sent real time the base station using wireless transmission electromagnetic obtained as well. case scenario considered by measuring field from our department network. automated system gives consistent results since it shows highest energy levels next sources. This papers...

Redundant data transmissions are likely to happen repeatedly inWireless Sensor Networks (WSNs). According the literature survey, energy-efficiency predominately relies on aggregation rather than routing or duty-cycling approaches. As redundancy dominates power usage in communication costs, order identify and reduce redundant by individual nodes, we propose a hybrid aggregative window function (DAWF) algorithm for exploiting both spatial temporal redundancies WSNs. Furthermore, proposed novel...