نتایج جستجو برای: plasma antenna
تعداد نتایج: 398800 فیلتر نتایج به سال:
This paper presents a new design of a CPW-Fed multi bands planar antenna. This antenna can be integrated easily with passive and active elements. The proposed antenna is suitable to operate for GPS, PCS and WiMAX bands. Its entire area is 52.3x52.6mm2 and is employed on an FR-4 epoxy substrate and fed by a 50 Ohm coplanar line. The antenna parameters have been analyzed and optimized by using AD...
In this paper a microstrip antenna on a suspended substrate with capacitive feed is presented. capacitive feed is created by a slot within the rectangular patch around the feed point. The proposed antenna exhibits a much higher impedance bandwidth of about 47% (S11 < −10 dB). Effects of key design parameters such as the air gap between the substrate and the ground plane, the gap width between r...
This paper presents an E-ring shaped printed monopole antenna for UWB applications with dual notched bands performance. In order to generate single frequency band notch function, we applied a U-ring shaped monopole antenna, and by inserting a rectangular ring in the centre of it an E-ring shaped radiating patch created and a dual band-notch function can be achieved. The measured bandwidth of th...
fresnel zone plate antenna (fzpa) was considered as a recieving antenna. an expression of electric field on axis of antenna produced by an incidente plane wave was found . the expression was used for calculation of gain, efficiency and optimum phase correcting function. several fzpa are fabricated and tested. experimental and theoretical results were compared and it was shown that there was a g...
Sidelobe blanking (SLB) is a technique employed in radar signal processing to inhibit detection when an unwanted signal enters the radar receiver through antenna sidelobes. For this purpose, an auxiliary antenna and receiver channel are used in the radar system. Comparing the main antenna and auxiliary antenna signal strength, a decision is made for blanking the main channel output. In this pap...
The present paper is a work on fluorescent tube performing the function of a monopole plasma antenna. In the construction, the needed power supply to the fluorescent tube is controlled by an IC 555 timer. In the experiments the supply frequency varies from 25Hz to 200Hz. By using a vector network analyzer it is shown that the persistence of plasma developed inside the tube persists for longer d...
An ion beam has been measured emerging from a low pressure 0.04 Pa helicon plasma reactor over a narrow range of magnetic field values 1 mT B0 3 mT . The presence of the ion beam occurs simultaneously with a large increase in the plasma density for the same applied magnetic field, produced using a single solenoid half the length of the m=1 rf antenna. The peak central plasma density of 1.5 1017...
n the framework of the ion cyclotron resonance frequency (ICRF) heating development at CEA Cadarache, a prototype antenna based on the load-resilient electrical layout foreseen for ITER has been built. This prototype was recently tested in Tore Supra. The ITER-like electrical scheme has been validated during fast perturbations at the edge plasma. Clear load resilience properties are reported. M...
Related Articles TM01-mode microwave propagation property analysis for plasmas with disk-plate windows by a finite-difference time-domain method J. Vac. Sci. Technol. A 25, 816 (2007) Characteristics of large-diameter plasma using a radial-line slot antenna J. Vac. Sci. Technol. A 24, 1421 (2006) Outgassing of lower hybrid antenna modules during high-power long-pulse transmission J. Vac. Sci. T...
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