|
 Ansoft Designer / Ansys Designer 在线帮助文档：
Terms in Designer >
Glossary: R
Glossary: R
Radix
Refers to the number of digits in a numbering system.
For example, the decimal numbering system is said to be radix-10. May
also be referred to as the "base".
Reed-Müller Logic
Logic functions implemented using only XOR and XNOR
gates.
Refractory Metal
Metals such as tungsten, titanium, and molybdenum
which are capable of withstanding extremely high, or refractory, temperatures.
Remotely Reconfigurable Hardware
A product whose function may be customized remotely,
by telephone or radio, while remaining resident in the system (see also
Configurable Hardware, Reconfigurable Hardware, Dynamically Reconfigurable
Hardware, and Virtual Hardware).
Reflection
The appearance of a previously transmitted signal
on the transmission line causing interference with the current signal.
Reflections are caused by a poorly terminated or discontinuous transmission
line, where the signal energy is not fully absorbed within the receiver
and is therefore transmitted back towards the transmitter.
Resist
A material which is used to coat the substrate and
is then selectively cured to form an impervious layer.
Resistor-Transistor Logic (RTL)
Logic gates implemented using particular configurations
of resistors and bipolar junction transistors. For the majority of today's
designers, resistor-transistor logic is of historical interest only.
Return Loss
Return Loss (dB) is defined as a ratio of the incoming
signal to the same reflected signal as it enters a component.
Return Loss (dB) = 10 * LOG10(Reflected Power/Incident
Power)
RF
Radio Frequency; the range in the electromagnetic
spectrum loosely defined from 30 MHz to 3 GHz (with corresponding wavelengths
from 1000 cm to 10 cm).
RF Power
A class of engineering. Circuits and signals primarily
concerned with power levels ranging from a few watts to tens of thousands
of watts in the RF spectrum.
RF Power Transmitter
A discrete packaged transistor used in the amplification
of RF power.
Rigid Flex
Hybrid constructions which combine standard rigid
circuit boards with flexible printed circuits, thereby reducing the
component count, weight, and susceptibility to vibration of the circuit,
and greatly increasing its reliability.
Ringing
Common name for the waveform that is seen when a transmission
line ends at a high impedance discontinuity. The signal first overshoots,
then dips down below the target value, and continues this with decreasing
amplitude until it converges on the target voltage.
Risetime
The time it takes for a signal to rise from 10% of
its total logic swing to 90% of its total logic swing.
Rising-Edge
A transition from a logic 0 to a logic 1. Also known
as a positive edge.
RTL (Resistor-Transistor Logic)
Logic gates implemented using particular configurations
of resistors and bipolar junction transistors. For the majority of today's
designers, resistor-transistor logic is of historical interest only.
HFSS视频教程
ADS视频教程
CST视频教程
Ansoft Designer 中文教程
|
淘宝官方店 