scholarly journals Ultra Wideband (UWB) Pulse Reflection from a Dispersive Medium Half Space

10.5772/18563 ◽  
2011 ◽  
Author(s):  
Qingsheng Zeng ◽  
Gilles Y.
Keyword(s):  
Half Space ◽  
Dispersive Medium ◽  
Ultra Wideband

Transient radiation in a plane stratified dispersive medium. I. Half-space configuration

1968 ◽  
Vol 46 (9) ◽  
pp. 1059-1071 ◽  
Author(s):  
Edward Ott ◽  
Jerry Shmoys
Keyword(s):  
Half Space ◽  
Dispersive Medium ◽  
Current Source ◽  
Closed Form Solution ◽  
Independent Solution ◽  
Delta Function ◽  
Form Solution ◽  
Space Problem ◽  
Magnetic Current ◽  
Similarity Principle

In this paper a similarity principle will be derived for a class of transient diffraction problems in cold, lossless, isotropic plane stratified plasmas. The similarity principle will be utilized to obtain an exact closed-form solution to the problem of a magnetic current source whose density is a delta function (in space and time) situated either in or above a homogeneous plasma half-space. This solution will be interpreted in terms of rays and group velocity. An independent solution to the half-space problem will also be obtained using asymptotic techniques. Exact and asymptotic solutions will be compared and discussed.

scholarly journals Application of Coupled-Wave Wentzel-Kramers-Brillouin Approximation to Ground Penetrating Radar

2017 ◽  
Author(s):  
Igor Prokopovich ◽  
Alexei Popov ◽  
Lara Pajewski ◽  
Marian Marciniak
Keyword(s):  
Dielectric Permittivity ◽  
Half Space ◽  
Time Domain ◽  
Ground Penetrating Radar ◽  
Lunar Regolith ◽  
Analytical Description ◽  
Ultra Wideband ◽  
Air Ground Interface ◽  
Ground Penetrating ◽  
Coupled Wave

This paper deals with bistatic subsurface probing of a horizontally layered dielectric half-space by means of ultra-wideband electromagnetic pulses. A receiver collects reflections from the air-ground interface and from the gradients of dielectric permittivity in the half-space. This scenario is of interest for ground penetrating radar (GPR) applications. For the analytical description of the received signal, we developed and implemented a novel time-domain version of the coupled-wave Wentzel–Kramers–Brillouin approximation. Our solution is in very good agreement with finite-difference time-domain results, radically accelerates calculations, and effectively accounts for the protracted return signals observed in the lower part of the GPR spectrum. The paper includes results showing the application of the proposed technique to two case studies: in particular, the method was employed for the post-processing of experimental radargrams collected on Lake Chebarkul, in Russia, and to simulate GPR probing of the Moon surface, to detect smooth gradients of the dielectric permittivity in lunar regolith.

On a technique for deriving explicit transfer matrices of orthotropic layers

2015 ◽  
Vol 37 (4) ◽  
pp. 303-315 ◽  
Author(s):  
Pham Chi Vinh ◽  
Nguyen Thi Khanh Linh ◽  
Vu Thi Ngoc Anh
Keyword(s):  
Wave Propagation ◽  
Explicit Form ◽  
Half Space ◽  
Transfer Matrix ◽  
Rayleigh Waves ◽  
Secular Equation ◽  
Transfer Matrices ◽  
Orthotropic Layer ◽  
Wave Propagation Problem ◽  
Arbitrary Thickness

This paper presents  a technique by which the transfer matrix in explicit form of an orthotropic layer can be easily obtained. This transfer matrix is applicable for both the wave propagation problem and the reflection/transmission problem. The obtained transfer matrix is then employed to derive the explicit secular equation of Rayleigh waves propagating in an orthotropic half-space coated by an orthotropic layer of arbitrary thickness.

Design of a Bell-Shaped Ultra Wideband Antenna for Indoor Localization System

2015 ◽  
Vol 5 (6) ◽  
pp. 323 ◽  
Author(s):  
Nadia Ghariani ◽  
Mohamed Salah Karoui ◽  
Mondher Chaoui ◽  
Mongi Lahiani ◽  
Hamadi Ghariani
Keyword(s):  
Indoor Localization ◽  
Ultra Wideband ◽  
Localization System ◽  
Wideband Antenna

Baseband Receiver Design for the MBOA Ultra Wideband Wireless Personal Area Networks

2009 ◽  
Vol E92-B (1) ◽  
pp. 143-149
Author(s):  
Sen-Hung WANG ◽  
Chih-Peng LI ◽  
Chao-Tang YU ◽  
Jian-Ming HUANG ◽  
Chua-Chin WANG
Keyword(s):  
Ultra Wideband ◽  
Personal Area Networks ◽  
Receiver Design ◽  
Wireless Personal Area Networks ◽  
Baseband Receiver
Sign in / Sign up

Export Citation Format

Share Document