In modern communication, data centers, 5G/6G base stations, and high-frequency radio frequency transmission systems, connectors not only bear the task of signal transmission but also bear increasingly higher frequencies and larger power loads. For domestically produced connectors, when replacing imported brands such as Telegärtner, "heating" is an issue that cannot be ignored. This article will be based on the technical characteristics of Telegärtner brand high-frequency connectors, combining the causes of heating, selection, and preventive measures, to provide guidance for the application of domestic substitute products in high-frequency usage scenarios.
Telegärtner connector high-frequency characteristics and technical referenceTelegärtner's 7-16 series coaxial connectors are suitable for high-power, high-frequency transmission, with the specifications indicating a frequency range up to 7.5 GHz.
In its product information, it mentions that "design techniques ... resulted in previously unattainable levels of performance in regard to return loss (VSWR) and intermodulation distortion".
●Telegärtner also points out that some of its coaxial connectors can achieve "min. –22 dB @ 12 GHz" return loss, offering excellent performance in high-frequency and large data transmission scenarios.
●The brand products also pay attention to environmental tolerance, such as IP67/68 protection, wide temperature range (-40℃ to +85℃) and other characteristics.
The summary of reference significance: In order to replace the Telegärtner brand in high-frequency applications, domestic connectors must have similar capabilities in terms of frequency carrying capacity, impedance matching, electrical losses, mechanical structure, and environmental adaptability; otherwise, the "heating" problem may become a bottleneck.
The common causes of overheating in domestic connectors during high-frequency useTo deal with the "heating" issue, we first understand why connectors heat up. Common reasons include:
Impedance mismatch & large signal loss
At high frequency transmission, if there is a deviation in the connector impedance and severe signal reflection at the interface (poor return loss), excess energy may be converted into heat at the connector. Telegärtner's documentation emphasizes the importance of low return loss.
High contact resistance or process deterioration
If the material of the contact piece is not selected properly, the coating is thin, or the processing quality is poor, the contact resistance will increase, leading to local heating of the connector.
High power density + poor thermal dissipation conditions
In high-frequency and high-power scenarios (such as base stations and antenna interfaces), connectors bear long-term signal transmission, and if the installation environment has poor ventilation and heat accumulation, heat source accumulation will occur.
4. Unreasonable mechanical structure/shielding/grounding design
Poor cleanliness, insufficient locking, and poor shielding grounding can also lead to the appearance of local hotspots, thereby accelerating heat generation or reducing lifespan.
Three, selection and prevention and control techniques for fever issues (facing domestic substitution)When selecting domestic connectors for high-frequency applications (to replace brands such as Telegärtner), it is recommended to start from the following aspects:
1. Clarify the environmental use and thermal load estimation
●Determine the signal frequency, power level, impedance (50Ω/75Ω), continuous working time, environmental temperature, and ventilation conditions in the system.
● Require suppliers to provide temperature rise test data: for example, the surface temperature of the connector does not rise by more than how many degrees Celsius after running at full power for 1 hour.
If installed outdoors or in a densely packed equipment box, consider the heat accumulation effect and reserve sufficient space and conditions for heat dissipation.
The requirements for electrical indicators are clear.
●Request the connector to provide test data for Return Loss, Insertion Loss, **Passive Intermodulation (PIM)**, etc., for reference to Telegärtner's high-performance specifications.
●Material requirements: such as the material of the inner and outer conductors, electroplating thickness, insulating material (such as PTFE), contact resistance value, etc., should be specified clearly.
3. Structure and thermal dissipation design considerations
●Prioritize designs with excellent structure, good metal shell heat dissipation, and reliable locking. Metal shell, good grounding, and matching sealing parts (such as O-ring) are bonus points.
● Pay attention to the installation method: If the connector is installed inside the box, consider the heat dissipation channels inside the box; use a heatsink or forced ventilation if necessary.
In batch inspection, sample testing is conducted on temperature rise, lifespan (number of plugging and unplugging), and temperature changes under vibration conditions.
4. Installation and Maintenance Standards
Ensure the interface is clean, free of debris, and the clamping force meets requirements during installation.
●Suggest regular monitoring of the actual temperature of the connector (such as infrared temperature measurement or pasting temperature strips) in order to discover anomalies early.
If long-term temperature rise is found to be abnormal, it should be stopped and checked immediately to see if there is aging, loosening, or poor contact of the connecting parts.
In high-frequency scenarios, "heating" is not a minor issue, but a key risk that may affect signal quality, equipment lifespan, and system stability. Taking Telegärtner as a technical benchmark, we can see that high-quality high-frequency connectors have high requirements in terms of frequency, loss, structure, and environmental adaptability. For domestic connectors to replace them, it is not only about being "usable" but also "reliable." By clearly estimating thermal load, refining selection criteria, and standardizing installation and maintenance operations, we can minimize the risk of heating in high-frequency use of connectors, thereby ensuring the long-term stable operation of the system.
If you are interested in the domestic substitute products for Telegärtner brand connectors or have procurement needs, or if you have production or sales channels for these domestic substitute products for Telegärtner brand connectors and wish to engage in in-depth cooperation or communication, please contact us through the following contact information:
Manager Zhang (18665383950, WeChat number the same)Contact us, we look forward to working together with more industry partners.
