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This paper describes a novel microstrip patch antenna with switchable circular polarization. A square patch whose two top corners are truncated by a square portion is used to realize the proposed antenna. Two Schottky diodes connected in the opposite direction are used to correlate the separated corner segments with the patch by their switching operation. As a result, RHCP and LHCP can be alternated...
Frequent monitoring is required for chronically ill cardiac patients to ensure superior treatment. This paper presents a low-cost, novel wearable electrocardiogram (ECG) measuring unit for consistent use. In this study, the ECG signal is accumulated by a three electrode data acquisition system and measured by an integrated signal conditioning block AD8232. The analog signal from AD8232 is converted...
(Bi2O3Fe2O3)0.4(Nb2O5Nd2O3)0.6 was syhthesised by solid state reaction method for studying the properties of the material. Synthesized material was sintered at two different temperature (1000°C and 1150°C). X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Dielectric property and DC resistivity of the materials are reported in this paper. Existance of bismuth iron niobium oxide and neodymium...
This paper presents a circularly polarized 1×2 array antenna for X-band applications. Both-sided MIC technology is effectively used to design this array antenna as the array antenna consists of both microstrip lines and slot lines to realize the feed network. Patch elements and microstrip lines are placed on the top surface of the substrate and slot lines on the reverse surface (ground plan) of the...
Due to low cost, low power consumption and better on-chip functionality CMOS Image Sensor has become the main image sensor for consumer electronics, machine vision as well as in research applications. Besides the advantages, a CMOS image sensor suffers from noises, less sensitivity as well as lacks of Dynamic Range (DR). Logarithmic response Active Pixel Sensor (APS) is a solution for wide dynamic...
In this paper, the design of a circularly polarized array antenna with 9.56 dBi of gain at 10 GHz frequency is presented. The proposed antenna consists of a 2×2 array antenna with feed network where all microstrip patches are linearly polarized. “Both-Sided MIC Technology” is used to design the proposed array antenna. The simulated return loss of the proposed array antenna is less than −35dB. The...
This paper describes an effort to design and characterize a patch antenna with circular polarization by using a single feeding technique instead of multiple feeding or any switching devices or couplers. Here a single feed is split into three feed lines to ensure orthogonal modes on each radiating patches. Both-sided MIC technology is used to realize the proposed array antenna. The proposed antenna...
In developing the ITP (induction thermal plasma) source for the thermal modification of micro-particles, it is crucial to comprehensively explore the effects of plasma torch dimensions, effects of plasma discharge conditions and particle parameters. Considering the plasma-particle interactions and particle loading impacts, a interactive flow model for argon-oxygen mixed-gas plasma is developed to...
Design of a microstrip array antenna to achieve dual circular polarization is proposed in this paper. The proposed antenna is a 2×2 array antenna where each patch element is circularly polarized. The feed network has microstrip lines, cross slot lines and air-bridges. The array antenna can excite both right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) without using...
In this paper, the design of a circularly polarized array antenna at 10 GHz frequency is presented. The proposed antenna consists of a 1×2 array antenna with feed circuit. To realize circular polarization, dual-orthogonal feed circuit is used that excites two orthogonal modes with equal amplitude but quadrature in phase. Feed circuit is designed using microstrip lines and slot lines where microstrip...
Collision avoidance is a major area of research in vehicle control & safety that involve varying degrees of uncertainty. In general, this problem is challenged with forward collision avoidance technology (FCAT) in cars. An intelligent technique that complements the driving experience must work to avoid collisions generating a smooth trajectory, the vehicle to the intended destination as quickly...
This paper presents a new circularly polarized array antenna using linearly polarized microstrip patches with a gain of 7.47 dBi. The array structure consists of four square patch antennas with feed network. The feed network is designed using microstrip lines on the obverse side of the dielectric substrate and slot line on the reverse side of the substrate. The Teflon glass fiber substrate is used...
The endeavor to satisfy both the physical and mental needs of the patient has always been a challenge for the medical profession. Recently, engineers are performing a key role in meeting this challenge. In order to provide a motivating treatment environment in a clinical setting and at home, a new computer input device and simulating games has been developed for this paper. The setup can be used with...
In this paper, a 4-element circular polarization switchable patch array antenna is proposed. The array antenna is realized by the successful employment of the both-sided MIC technology, where the odd and even mode of the slot line and microstrip lines are used for the realization of the orthogonal feed and magic-T switching circuit respectively. The advantage of the magic-T circuit is the excellent...
In this paper a multiple strip photo mixing demodulator fabricated on high resistivity silicon is described. The performance such as DC characteristics, demodulation contrast and non-linearity problem of a test sample are simulated and experimentally estimated. The experimental results exhibit a good DC charge separation and good dynamic demodulation capabilities up to 30MHz. The influence of modulation...
We report on a 0.18μm CMOS range image sensor with 120×160 array of 10×10μm2 photonic demodulation pixels allowing for real-time 3D imaging with a worst-case accuracy of 3.3% in the distance interval [1.2–3.7] m.
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