Results 221 to 230 of about 155,150 (257)

Fontänen und Loopings am laufenden Band

Physik in unserer Zeit, 2018
ZusammenfassungZu Schlaufen verknüpfte Seile können durch einen einfachen Antriebsmechanismus in Rotation versetzt und in Abhängigkeit von der Rotationsgeschwindigkeit zu unterschiedlichen Bewegungsfiguren angeregt werden. Die bei niedrigen Rotationsgeschwindigkeiten auftretende Seilfontäne geht bei höheren Geschwindigkeiten durch einen Symmetriebruch ...
Wilfried Suhr, Hans Joachim Schlichting
openaire   +1 more source

A novel ultra wide-band loop antenna

2010 IEEE International Conference on Wireless Information Technology and Systems, 2010
This paper has presented a wide-band loop antenna applied a self-complimentary structure. The size of the designed antenna is λ/4.5 in width, λ/4.5 in length × λ/5.6 in height. The designed antenna showed extremely wide-band characteristic which is 0.3∼11.2 GHz (37.3:1).
null Myung-Han Yoon, null Yuil Shin, null Hong-Kyun Ryu, null Jong-Myung Woo   +3 more
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A dual band meandering folded loop antenna

IEEE Antennas and Propagation Society Symposium, 2004., 2004
The authors show that the folded loop antenna can be meandered into a compact size. With the help of a figure-of-L coupled line, the antenna can work in two bands. The coupled line can improve matching and generate the second band. Moreover, the antenna is printed on a common FR4 PCB, which is easy and cheap to make.
null Bing Bai, null Zheng He Feng
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Controllable band loops of ultracold atoms in a cavity

The European Physical Journal D, 2012
We theoretically investigate the atomic energy band of ultracold atoms inside a laser-driven optical cavity with Kerr medium. This cavity-atom hybrid system has two kinds of interactions: photon-atom interaction and photon-photon one. We find the loops of the atomic energy band induced by photon-atom interaction disappear when the Kerr interaction ...
Q. Zheng, S. C. Li, L. B. Fu
openaire   +1 more source

Design of a tunable dual‐band loop antenna

Microwave and Optical Technology Letters, 2011
AbstractA dual‐band frequency tunable loop antenna that utilized a circuit model was introduced. An open loop antenna was selected as a prototype, which could be simply represented by an LC resonant circuit. To overcome the input mismatch in high‐frequency region, an additional π circuit was introduced.
Woo, DW, Lee, DH, Ko, JW, Baek, JH, Park, WS   +4 more
openaire   +2 more sources

Widening of Operational Frequency Band of the Loop Antenna

2005 IEEE International Conference on Ultra-Wideband, 2006
It has been shown that the gain and the bandwidth of the loop antenna can be substantially improved by increasing the electric dipole moment of the antenna. A suggested combination of the loop antenna with a wideband dipole increases antenna gain by 15 dB and extends the antenna bandwidth by 80%.
A.G. Yarovoy, A.V. Vorobyov
openaire   +1 more source

An L-Band Loop-Type Coupler (Correspondence)

IEEE Transactions on Microwave Theory and Techniques, 1961
The design of loop couplers for various loop length has been reported by Lombardini, Schwartz and Kelly. This device is useful for many applications as the over-all length can be held to about 6 inches, whereas a com-parable multihole coupler must be on the order of several feet long.
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Loop antennas in the 3-30 MHz band

8th International Conference on High-Frequency Radio Systems and Techniques, 2000
The loop antenna, in common use in the 3-30 MHz band, was reassessed in a previous paper in which it was considered as a folded dipole, with suggested theoretical advantages. This paper demonstrates that the two lowest-order modes which exist in small loop antennas correspond to the true loop, otherwise known as the magnetic dipole (zero-order mode ...
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Loaded dual band loop arrays

1980 Antennas and Propagation Society International Symposium, 1980
A. Shoamanesh, L. Shafai
openaire   +1 more source

Model-Based Closed-Loop Suppression of Parkinsonian Beta Band Oscillations Through Origin Analysis

IEEE Transactions on Neural Systems and Rehabilitation Engineering, 2021
Fei Su, Huiyan Li
exaly