Mitigation of connector stub resonance
Example implementations described herein are directed to a method and apparatus for improving insertion loss of connector stub and thereby increasing a system's signal bandwidth. This technique shapes the connector stub in a specific way to shift its resonant frequency higher while having equal or better electrical performance below the original resonant frequency.
1. A method of mitigating connector stub resonance, the method comprising:
shifting resonant frequency of a connector stub to be higher than an original resonant frequency of the connector stub; and
modifying a characteristic impedance of the connector stub such that input impedance of the connector stub becomes capacitive at the original resonant frequency.
2. The method of claim 1 , wherein the connector stub comprises a plurality of segments, wherein at least one of the plurality of segments has a different width or impedance than another one of the plurality of segments.
3. The method of claim 1 , wherein the connector stub comprises a continuously shaped structure having a low-then-high impedance structure from a plug portion of the connector stub to an end of the connector stub.
4. The method of claim 1 , further comprising reshaping the connector stub such that the connector stub has a total capacitance that is equal to or less than the total capacitance of the original stub.
5. The method of claim 1 , further comprising reshaping the connector stub such that the connector stub has a total area that is equal to or less than the total area of the original stub.
6. A connector plug, comprising:
a connector stub reshaped from an original connector stub, the connector stub configured to engage with a receptacle, the connector stub comprising a first section and a second section, the first section configured to be in closer proximity to an entrance of the receptacle than the second section when the connector stub engages the receptacle, the second section disposed towards a plug end of the connector plug;
wherein the first section has a smaller impedance than the second section, wherein at least one of:
a) capacitance of the connector plug stub, and
b) total area of the connector plug stub
is made to be equal to or less than the original connector plug stub.
7. The connector plug of claim 6 , wherein the first section has a larger width than the second section.
8. The connector plug of claim 6 , wherein the first section comprises a plurality of low-then-high impedance structures.
9. The connector plug of claim 8 , wherein the second section comprises a plurality of low-then-high impedance structures.
10. The method of claim 1 , wherein the connector stub comprises a continuously shaped structure having a low-then-high impedance structure from a receptacle portion of the connector stub to an end of the connector stub.
11. A connector receptacle, comprising:
a connector stub reshaped from an original connector stub, the connector stub configured to engage with a plug, the connector stub comprising a first section and a second section, the first section configured to be in closer proximity to a larger width section of a plug than the second section when the connector receptacle engages the plug, the second section is situated away from the end of the connector plug;
wherein the first section has a smaller impedance than the second section, wherein at least one of:
a) capacitance of the connector receptacle stub, and
b) total area of the connector receptacle stub
is made to be equal to or less than the original connector stub.
12. The connector receptacle of claim 11 , wherein the first section has a larger width than the second section.
13. The connector receptacle of claim 11 wherein the first section comprises a plurality of low-then-high impedance structures.
14. The connector receptacle of claim 13 , wherein the second section comprises a plurality of low-then-high impedance structures.