UHF radio propagation characteristics in straight open-groove structures

Zhang, Y.P.; Hwang, Y.; Parsons, J.D.

doi:10.1109/25.740100

Cited by 9 publications

(13 citation statements)

References 6 publications

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“…Equation (20) is the same found by Zhang [4] and equation (21) is similar to equation (20) in [2]. Also, to predict the attenuation due to sidewalls tilt in straight tunnels we may use the formulation established in [4], which is similar to the one given in [2].…”

Section: B Attenuation Due To the Roughness Of The Sidewalls And To mentioning

confidence: 81%

“…The influence of the transmission and reception antennas is not taken into account. The parameters for the opengroove structure used here are; r1 = r2 = 4.18, 1 = 2 = 0.026 s/m, a=3.9 m. and b=4.8 m. The same parameters were used by Ohtaky [1] and Zhang [2]. The attenuation due to absorption is presented in Fig.…”

Section: Numerical Examplesmentioning

confidence: 97%

“…Also, to predict the attenuation due to sidewalls tilt in straight tunnels we may use the formulation established in [4], which is similar to the one given in [2]. In both cases, an error in the final result exists.…”

Section: B Attenuation Due To the Roughness Of The Sidewalls And To mentioning

confidence: 98%

“…In this section, a brief summary of the waveguide theory is presented [2]. The guided wave characteristics in a Cartesian coordinate system can be described by its wave vector (K xi , K yi , K zi ), where i= 0,1,2.…”

Section: A Attenuation Due To Absorptionmentioning

confidence: 99%

“…These places may be considered as open-groove structures. For the determination of the attenuation constant for this type of structure there are two models: the geometrical optical model described by Othaki [1] and the imperfect waveguide model described by Zhang [2]. The derivation of the theoretical solution for the second model is somewhat complicated but it is simple in numerical computation in comparison with the first one.…”

Section: Introductionmentioning

confidence: 99%

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Propagation characteristics in straight open-groove structures

Lastra¹,

Barbin²

SBMO/IEEE MTT-S International Conference on Microwave and Optoelectronics, 2005.

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This paper presents the propagation characteristics in straight open-groove structures in UHF based on the imperfect waveguide method. The attenuation constant due to surrounding media absorption, sidewalls tilt and the roughness of the sidewalls are considered and corrected. Numerical results are presented for the attenuation constant. These results show that the losses due to the roughness of the sidewalls are inversely proportional to the frequency and losses due to sidewalls tilt is the main cause of power loss at high frequencies. Thus attenuation due to absorption and roughness of the sidewalls are negligible in comparison to attenuation due to sidewalls tilt in this frequency range. Index Terms 1 -Imperfect waveguide method, opengroove structures.

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