impedance mismatch


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impedance mismatch

The difficulty of storing the many-to-many relationships of an object model in a traditional relational database. See O-R mapping.
References in periodicals archive ?
The effects of an impedance mismatch must be known and understood.
When this issue was raised, a very smart salesman coined the term "velocity matching" and stated that the density was causing all the problems in the impedance mismatch and that looking at the velocity alone was a better approach.
Scattering parameters are required to be evaluated under different degrees of bending since they are prone to change/deterioration due to impedance mismatch and an increased correlation between the array elements.
where [Z.sub.A] represents the parasitic impedances from X node of the conveyor to ground, [[epsilon].sub.X] represents common-mode current mismatch related to the parasitic impedance mismatch of the X ports of the two operational conveyors (i.e.
TL7 is the stepped-impedance line to reduce reflection caused by impedance mismatch. Theoretically when the total electrical length of TL2 and TL8 equals [lambda]/12, the impedance of third harmonic is well maintained at high impedance region over a certain frequency range, which requires [lambda]/[n.sub.1] + [lambda]/[n.sub.2] [approximately equal to] [lambda]/12.
The topology shown in figure 8 is used for the link segment simulation, which uses a maximum impedance mismatch of 10[OMEGA] between cable and connectors.
Farell, "The effect of impedance mismatch on phase linearity of GCPW loaded transmission lines and shunt stubs", in Proc.
The working mechanism is mainly based on the energy absorption of coating through large deformation with a very short time interval as well as the wave reflection between the interfaces of materials with great acoustic impedance mismatch. Elastomers or viscoelastic rubbers are often used owing to their low modulus, high damping, large extensibility, recoverable deformation, low costs, and short cycle for repairing.
Due to the premature convergence of standard PSO algorithm which is easy to fall into local optimal, we present an improved particle swarm optimization algorithm for solving impedance mismatch problem (IPSO-IMp).
In the case of the RTC clad absorber, the inner pyramidal core (RHC) had high impedance, hence large reflections occurred due to the impedance mismatch. This time-domain analysis also validated our conclusion that the RHC-clad pyramidal absorber with an RTC inner core will have less reflection (better anechoic performance).
85[OMEGA] Differential Pair Attributes PCB ATTRIBUTES 85[OMEGA] DIFFERENTIAL PAIR ADVANTAGES RELATIVE TO A 100[OMEGA] DIFFERENTIAL PAIR DESIGN Multilayer Lay-up Reduced thickness Trace Width and Space Reduced (must consider skin effect loss) Greater Coupling Losses within the DP will slightly increase (Reduced DP Separation) Impedance Mismatch Potential to reduce Propagation Loss Potential to reduce through wider traces Plated Through-Hole (PTH) Reduced length (reduced PCB dielectrics) (backdrilling required for both 85 and 100[OMEGA] applications) PTH Potential to reduce diameter and increase routing channels