Coaxial RF Connector Compensation Element Impedance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing coaxial HF connector designs experience impedance discontinuities and significant signal reflections, particularly above 20 GHz, due to manufacturing tolerances at the transition between the connector and housing, leading to increased impedance and unwanted reflections.
Innovation Solution
A compensation element is introduced between the connector and housing, extending radially further than the outer conductor in a 360° circumferential range, ensuring the outer conductor is brought closer to the inner conductor, thereby increasing local capacitance and reducing impedance discontinuities and reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector is connected to the housing via a gas-tight connection element with tolerances in manufacturing, then hermetic sealing is achieved, but impedance discontinuities and signal reflections occur at the transition area
Solution Approach 1:
A compensation element is introduced as an intermediary component between the connector and the housing. This compensation element has a specific geometry that extends further in the radial direction than the outer conductor, thereby compensating for manufacturing tolerances and maintaining impedance continuity without compromising the hermetic sealing provided by the gas-tight connection element.
Solution Approach 2:
The compensation element is designed to extend further in the radial direction only in the transition area where impedance compensation is needed, rather than uniformly throughout. This localized geometric feature allows the compensation element to correct impedance discontinuities at the critical transition zone while maintaining the overall hermetic sealing integrity.
2Reliability
If the inner conductor is set back to avoid touching down, then mechanical contact is avoided, but impedance discontinuity increases due to tolerance accumulation
Solution Approach 1:
The compensation element acts as a mediator that compensates for the setback distance of the inner conductor. By extending further in the radial direction, it effectively makes up for the gap created by the setback, thereby maintaining impedance continuity without requiring the inner conductor to be in direct contact with the outer conductor, thus preserving electrical isolation.
3Stability of the object's composition
If the connector is inserted deeper into the housing to avoid protrusion, then mechanical fit is improved, but impedance discontinuity and reflections increase
Solution Approach 1:
The compensation element provides localized geometric compensation in the transition area where the connector meets the housing. Its extended radial dimension at this specific location compensates for the deeper insertion depth, thereby maintaining impedance continuity without compromising the mechanical fit stability achieved by the deeper insertion.
4Ease of manufacture
If standard coaxial connector design is used, then manufacturing is simple, but significant reflections occur above 20 GHz
Solution Approach 1:
The compensation element introduces a localized geometric feature that extends further in the radial direction only at the critical transition area. This minimal modification to the standard coaxial connector design maintains ease of manufacture while effectively reducing reflections and improving signal transmission quality above 20 GHz.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces impedance deviations from standard values (50 ohms or 75 ohms) and minimizes signal reflections across the frequency range, particularly above 20 GHz, by enhancing the transition area's capacitance per unit length.
Implementation Method 1
The compensation element ensures that the outer conductor of the connector is brought closer to the inner conductor in the area of the transition. This measure increases the capacitance per unit area locally in the transition area, so that the discontinuity and the reflections associated with it can be reduced.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a coaxial RF connector (10) for connecting a coaxial RF line to an RF housing (300), comprising: - a coaxial connector (100) forming the end of the RF line, with an inner conductor (102) and an outer conductor (101), - a coaxial connector (200) arranged in an opening of the housing (300), the inner conductor (202) of which is inserted into the inner conductor (102) of the coaxial connector (100), characterized in that a compensation element (400) is arranged between the connector (100) and the housing (300) and adjacent to it, which extends radially further towards the inner conductor (202) than the outer conductor (101) of the connector (100) in at least one circumferential angle range ≤ 360° of the coaxial RF connector (10). and without touching the inner conductor (202).