Triaxial TRB RF Connectors Guide: Types, Structure, and Uses Explained
What are Triaxial TRB RF Connectors?
TRB connectors are designed for triaxial cables, also known as twinax or triple coaxial cables. They are mainly used in applications that require noise suppression, like microcurrent measurements and precision test equipment.
These connectors provide reliable low-level signal transmission and are ideal for balanced line applications. With three lugs, the Bionet-lock (or bayonet-lock) mechanism ensures secure and easy connection. However, TRB connectors are not compatible with BNC connectors, as BNC connectors use a two-lug bayonet mechanism. This difference in design makes a physical connection impossible, and even if adapted, an impedance mismatch would degrade signal quality.
Triaxial TRB RF Connectors by Type
What is a Triaxial Cable?
Triaxial cables, also known as triple coaxial cables, have an extra layer compared to standard coaxial cables.
In regular coaxial cables, an insulator between the inner and outer conductors keeps electromagnetic noise from leaking out. However, when measuring tiny currents, even the small leakage that occurs despite the insulation can cause significant errors.
Triaxial cables solve this by adding an extra layer of intermediate conductor and inner coating between the insulation and outer conductor, preventing measurement errors in low-current measurements.
Triaxial TRB vs. BNC RF Connectors: Key Differences
Triaxial TRB RF connectors feature a bionet locking mechanism (also called bayonet) that ensures quick and secure coupling. This locking system makes the connectors easy to attach and detach. The mating section of the connector is designed similarly to a BNC, allowing for a familiar and reliable connection process.
The images below illustrate the connection process of the bayonet (bionet) locking mechanism in three simple steps.
Triaxial TRB RF connectors cannot mate with BNC connectors, as shown in the images below. The internal construction of triaxial cables is more complex, and the coupling mechanism differs. BNC connectors have two studs for mating, while triaxial TRB connectors feature three studs, utilizing a bionet-locking system for secure connection.
Triaxial TRB RF Connector Features
Noise Suppression
These connectors support triaxial cables with three layers, shielding against electrical noise. This makes them perfect for precise low-current (microcurrent) measurements.
Impedance Mismatch
Unlike BNC connectors, which have specific 50 Ω or 75 Ω impedance, TRB connectors lack a fixed impedance. This mismatch limits their use to lower frequencies.
Studs (Protrusions) Joined at 3 Points
TRB connectors feature a secure bayonet locking system, similar to BNCs, but with three studs (protrusions) for a stronger, more vibration-resistant connection.
Triaxial TRB RF Connector Applications
Triaxial TRB RF connectors are commonly used in applications that require high precision and low electrical noise, such as microcurrent measuring instruments and precision testing equipment. These connectors are ideal for sensitive measurements in fields like electronics, research, and telecommunications, where maintaining signal integrity and reducing interference is critical.
Triaxial TRB RF Connector Standards & Dimensions
Compatible Standards
Complies with military standard MIL-PRF-49142.
Nominal Impedance
Maintains a 50 Ω characteristic impedance for optimal signal integrity and minimal reflection.
Coupling Method (Connector Interface)
Features a secure 3-lug bayonet coupling for fast, reliable push-and-twist mating.
Working Voltage (Rated Voltage)
Rated for standard operating voltage of up to AC 400 volts.
Maximum Withstanding Voltage
Withstands 1200V AC (center-mid) and 500V AC (mid-outer) for one minute, ensuring integrity.
Insulation Resistance
Minimum insulation resistance of 1,000 megohms when tested with DC 500 volts, ensuring electrical safety.
Contact Resistance
Low resistance: Center < 2.0 mΩ, Mid < 0.5 mΩ, Outer < 0.4 mΩ ensures minimal signal loss.
Triaxial TRB RF Connector FAQs
QCan Tyclon triaxial TRB RF connectors be mated with TXA connectors?
QCan Tyclon triaxial TRB RF connectors be mated with TXA connectors?
Yes, Tyclon triaxial TRB RF connectors, meeting MIL-PRF-49142 standards, can mate with TXA connectors from other manufacturers adhering to the same standard. For best performance, use Tyclon connectors for both the plug and jack.
QWhat is a triaxial 3-lug connector, and is it compatible with Tyclon triaxial TRB RF connectors?
QWhat is a triaxial 3-lug connector, and is it compatible with Tyclon triaxial TRB RF connectors?
A "3-lug" connector refers to the three-stud bayonet locking system. Tyclon triaxial TRB RF connectors use this system and are compatible with others designed to MIL-PRF-49142 standards.
QWhat is the primary advantage of using Tyclon triaxial TRB RF connectors?
QWhat is the primary advantage of using Tyclon triaxial TRB RF connectors?
Tyclon triaxial TRB RF connectors excel in noise suppression due to their triaxial design, making them ideal for applications needing high signal integrity, like microcurrent measurements.
QWhat military standard do Tyclon triaxial TRB RF connectors comply with?
QWhat military standard do Tyclon triaxial TRB RF connectors comply with?
Tyclon triaxial TRB RF connectors meet MIL-PRF-49142 standards, ensuring reliable performance, quality, and compatibility with other devices that adhere to the same specification.
QWhat is the locking mechanism used in Tyclon triaxial TRB RF connectors?
QWhat is the locking mechanism used in Tyclon triaxial TRB RF connectors?
Tyclon triaxial TRB RF connectors feature a secure bayonet coupling with three lugs (studs), offering a reliable connection, unlike two-lug BNC connectors.
QAre Tyclon triaxial TRB RF connectors suitable for high-frequency applications?
QAre Tyclon triaxial TRB RF connectors suitable for high-frequency applications?
Tyclon triaxial TRB RF connectors are impedance-mismatched, making them unsuitable for high-frequency applications that demand optimal performance.
QWhat are common applications for Tyclon triaxial TRB RF connectors?
QWhat are common applications for Tyclon triaxial TRB RF connectors?
These connectors are used in precise environments like microcurrent measurement instruments, where noise reduction and signal integrity are crucial.
QCan Tyclon triaxial TRB RF connectors be mated with standard BNC connectors?
QCan Tyclon triaxial TRB RF connectors be mated with standard BNC connectors?
No, Tyclon triaxial TRB RF connectors cannot be mated with BNC connectors due to differences in design, including locking lugs and the triaxial versus coaxial nature.
QAre custom triaxial TRB RF connectors available?
QAre custom triaxial TRB RF connectors available?
Yes, Tyclon offers customization options, including cable processing and fittings, to meet specific application requirements.
QHow can I order triaxial TRB RF connectors, and what support do you offer?
QHow can I order triaxial TRB RF connectors, and what support do you offer?
Ordering is simple—you can purchase our triaxial TRB RF connectors directly on our website or contact our sales team for assistance. We also provide full technical support, including datasheets, CAD models, and application notes, to help you pick the perfect connector for your project.
Purchase Guide
Tyclon coaxial connectors and processed coaxial cable products can be purchased directly online using a variety of credit cards.
