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Matching Impedance Is An Important Part Of The PCB

Matching Impedance Is An Important Part Of The PCB


Matching Impedance is a characteristic of Radio frequency or microwave design. The impedance equal to 50 ohm is required to effectively transmit the power of the signal from input to destination that is loaded with minimum distortions.

If impedance does not match at input and output. There can be a loss of signal, power cannot be transferred to output or distortion may arise, and leads to occurrence of vertical waves. That ratio can approach to infinity.





But if Matching Impedance is matched. Then the problem of distortion or standing waves cannot occur.Or it can be a low vertical wave fraction in terms of voltage. But it is not easy to maintain impedance equal to 50 om. During transmission of signal from input to output. To uphold the impedance Stripline or microstrip technologies are used.

It displays impedance of transmission-line as contrarily relative to the line girth and specifically.Corresponding to the wideness of the dielectric substantial layers.

One contrast between microstrip and strip line is that. The stature of the flag follow over the ground for Stripline has less of an effect on impedance. It is more effect than the stature of a microstrip flag follow over the ground. The air above a micro strip schematic will actually contribute to the specific impedance. It displays impedance of transmission-line. As contrarily relative to the line girth. And specifically corresponding to the girth of the dielectric substantial layers.

Matching Impedance.png

If the circuit while a strip line schematic is confined to the interior. That of a sandwich of dielectric material. Air will constantly work to lower the operating dielectric constant of PCB solid . It is used in a micro strip schematic.

Due to this condition. The operative dielectric constant of PCB components used in a stripline schematic. Will be greater than the dielectric constituents used in a microstrip schematic.


By the wideness of the metal conduit layer utilized for the transmission lines. The size of the flag-shaped on that layer. And the wideness of the dielectric substrate. Smith’s chart is used to acquire an impedance matching.

Hi, I am Hommer, the founder of WellPCB. So far we have more than 4,000 customers worldwide. Any questions you can feel free to contact me. Thanks in advance.