The impedance standards discussed use transmission line analogy (TLA) techniques to determine their reflection coefficient. However, the TLA can only derive approximate values of reflectivity; to calculate a more accurate value of a standard's reflectivity a model has been developed, based on the ...
The ear-canal impedance and reflection coefficient were measured in an adult group and in groups of infants of age 1, 3, 6, 12, and 24 months over frequency range 125-10,700 Hz. The development of the external ear canal and middle ear strongly affect input impedance and reflection coeffici...
From the point of view of mixed-mode scattering parameters, Smm, a two-port device can be excited using different driving conditions. Each condition leads to a particular set of input reflection and input impedance coefficient definitions that should be carefully applied depending on the type of ...
A review of the current status of national impedance and reflection standards at RF and microwave frequencies is presented. In the first part, various proposals are examined for realizing a given characteristic impedance, or a calculable value of reflection coefficient, both in coaxial lines and in...
a但对于没有绳子的窗帘来说 But regarding does not have the string window blind[translate] aThis is the reflection coefficient of P-wave in the case of vertical incidence, proportional to the impedance difference. 在垂直的发生情况下,这是反射系数P挥动,比例与阻抗区别。[translate]...
The ideal value of the reflection coefficient is zero. In this condition, the load impedance is the same as the characteristic impedance. But in a practical transmission line, the value of the reflection coefficient is kept as small as possible. ...
Typically, the quality of the antenna impedance match to the feedline (or the system impedance) is evaluated through the reflection coefficient |S11|=|Γ| or the standing wave ratio (SWR).4 These are calculated from the antenna input impedance ZA and the system impedance Z0 as (17)S11=ZA...
It is difficult for conventional reflection seismic surveys to get the information of low velocity layers underlain highacoustic impedance layers, such as evaporites and basalts.顶( 0 )在蒸发岩、玄武岩等高阻抗岩层发育地区，常规反射地震往往难以获取高阻抗层以下的地层地质信息。6 Obviously, ...
(redirected fromImpedance match) Medical Encyclopedia impedance matching n. The use of electric circuits, transmission lines, and other devices to make the impedance of a load equal to the internal impedance of the source of power, thereby making possible the most efficient transfer of power. ...
5a, the strain output |S| becomes locally maximized, as expected from the impedance matching concept. In case when the present zero-impedance concept model is used, much larger |S| value than the value obtained in the impedance matched model can be obtained as |S| = 4.24|S0fT| at ...