In the fan-out area of high-pin BGAs, traces are often "necked-down" for routing space reasons between the BGA balls, which creates an impedance mismatch
(i.e., a reflection situation).
The proposed design exhibits reasonable isolation between the radiating elements ([S.sub.12] < -23 dB) and expresses a very low susceptibility to correlation and impedance mismatch
caused by the bending or conforming the antenna array.
As a result, the ELC metasurface can mitigate the impedance mismatch
, which is mainly caused by mutual coupling from the adjacent radiating waveguide, when the array is excited by progressive phase shift as the beam is scanned off the broadside.
The ultrasound signal is assumed to be significantly attenuated if the medical ultrasound transducers have a large acoustic impedance, because of the acoustic impedance mismatch
with the transmitting medium such as water, air, or oil .
However, by using advanced CCIIs such as commercial AD844, the implementation is not affected by impedance mismatch
. Moreover, if the frequency is not high, the impedance mismatch
is not an issue at all.
In the digital arena, devices placed in the high-speed data path often employ "flow-through" packaging that helps keep the trace lengths equal between the positive and negative lines of the differential data lanes to avoid impedance mismatch
Unfortunately, there can be an impedance mismatch
inhibiting the flow of information between engineers and clinicians, according to Thomas Heldt, a professor in biomedical engineering at MIT.
The control of the fundamental impedance is given first priority to minimize the impedance mismatch
since the fundamental is the main output signal.
between program code and database, allowing more agile and rapid application development.
The impedance mismatch
of connectors and different nominal cable impedances for the individual cable segments are considered as the main reason for return loss.