Power transmission properties between arbitrarily focused antennas in fresnel region

We present the design and fabrication of metamaterials, and investigated the normalized power transmission properties of four metamaterials at different frequency in terahertz regime. We compared the power transmission performances of four types of metamaterials microstructures, and analyzed their transmission differences.

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Power Transmission Properties of Dry Hybrid V-Belt with Protuberant Tension Member on Contact Surfaces of Blocks: It’s Effect with Respect to Speed Ratio

Lecture Notes in Electrical Engineering - Proceedings of the FISITA 2012 World Automotive Congress ◽

10.1007/978-3-642-33777-2_43 ◽

2012 ◽

pp. 531-539

Author(s):

Hirotoshi Kawakami ◽

Kazuya Okubo ◽

Toru Fujii ◽

Hiroyuki Sakanaka ◽

Ryuichi Kido

Keyword(s):

Power Transmission ◽

Speed Ratio ◽

Transmission Properties ◽

Tension Member ◽

Contact Surfaces

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Derivation of Far-field Gain Using a Gain Reduction Effect in the Fresnel Region

Applied Computational Electromagnetics Society ◽

10.47037/2020.aces.j.351005 ◽

2020 ◽

Vol 35 (10) ◽

pp. 1137-1143

Author(s):

Ilkyu Kim ◽

Sun-Gyu Lee ◽

Jeong-Hae Lee

Keyword(s):

Power Transmission ◽

Near Field ◽

Separation Distance ◽

Far Field ◽

Preliminary Measurement ◽

Microwave Antennas ◽

Fresnel Region ◽

Wide Range ◽

Reduction Effect ◽

Reference Parameters

A handy method of calculating far-field gain based on the magnitude of the power transmission in a Fresnel region is presented, which can be applied to the phaseless near-field measurement. Due to the short range inside an anechoic chamber, the probe antenna is often placed in the Fresnel region of the antenna under test (AUT). It is well-known that far-field gain of an antenna gradually reduces when one antenna moves to the other one placed in a proximity distance. This fact can be advantageously applied to estimate the far-field gain in a far-field region. The proposed method offers rapid estimation of the far-field gain based on the simple input knowledge such as the probe antenna gain and the magnitude of the power transmission and the separation distance between AUT and probe antenna. The proposed method can be applicable to a wide range of microwave antennas. This feature makes it possible to offer preliminary measurement results and reference parameters of the measurement for the various types of microwave antennas.

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The Investigation of Metamaterials by Measuring the Power of Transmission in the Terahertz Regime

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.571.133 ◽

2012 ◽

Vol 571 ◽

pp. 133-136

Author(s):

Jun Luo ◽

Ying Chen ◽

Sheng Wu Kang ◽

Xin Yu Zhang ◽

Chang Sheng Xie ◽

...

Keyword(s):

Power Transmission ◽

Transmission Peak ◽

Global Maximum ◽

Transmission Properties ◽

Maximum Transmission ◽

Measured Power

We present the design and fabrication of metamaterials, and investigated the power transmission properties of the metamaterials in the frequency ranging from 1.04THz to 4.25THz. The measured results reveal a global maximum transmission peak at 2.52THz. We compared measured power transmission performances of four types of metamaterials microstructures, and analyzed their transmission differences.

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