| TNC | ||
|---|---|---|
 | ||
| TNC connector on the left beside BNC. | ||
| Type | RF coaxial connector | |
| Production history | ||
| Designer | Paul Neill and Carl Concelman | |
| Designed | Late 1950s | |
| Manufacturer | Various | |
| Specifications | ||
| Diameter | Male: 0.590 in (15.0 mm) Female: 0.378 in (9.6 mm) (outer, typical) | |
| Cable | Coaxial | |
| Passband | Typically 0-11 GHz | |
Contents |
Variations
Reverse-polarity TNC
Reverse-polarity TNC (RP-TNC) is a variation of the TNC specification which reverses the polarity of the interface. This is usually achieved by incorporating the female contacts normally found in jacks into the plug, and the male contacts normally found in plugs into the jack. RP-TNC connectors are widely used by Wi-Fi equipment manufacturers to comply with specific local regulations[citation needed], i.e. those from the FCC, which are designed to prevent consumers from connecting antennas which exhibit gain and therefore breach compliance. This is the case for the popular Cisco line of Wi-Fi products. RP-TNC can also be abbreviated as RTNC75 Ohm TNC
Most TNC connectors are 50-ohm type even when used with coaxial cable of other impedances,[citation needed] but a 75-ohm series is also available, providing a good SWR to about 1 GHz.[2] These can be recognized by a reduced amount of dielectric in the mating ends. They are intermatable with standard types.Retail uses
Linksys, a manufacturer of consumer networking equipment, uses RP-TNC connectors for several of its Wi-Fi-certified routers, including the popular WRT54G.Telex Communications, a manufacturer of hearing aids and audio equipment, uses TNC connectors on its Radiocom BTR-800 partyline intercom base station for the transmit and receive antennas.
Camplex, a Camera multiplexing unit, uses TNC connectors to send power/tallies/intercom to a camera. The camera sends back audio, video, and intercom.[3]
Icom, a mobile telecommunications equipment manufacturer, uses TNC antenna output terminals in some models intended for the professional VHF PMR market.
Electro-Voice, a pro audio manufacturer, uses these style connectors on their wireless microphone systems.
See also
- SMA connector, also has RP-SMA version used for Wi-Fi
- SMB connector
- SMC connector
References
^ E-Base Interactive. "TNC Connector Series". Amphenol RF. Retrieved 2011-01-12.^ "HUBER+SUHNER TNC 75 Ohm series (EN)". Hubersuhner.com. 2010-10-28. Retrieved 2011-01-12.
^ "Innovation in Motion". Camplex. Retrieved 2011-01-12.
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SMA connector
- From Wikipedia, the free encyclopedia
SMA (SubMiniature version A) connectors are coaxial RF connectors developed in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has a 50 Ω impedance. It offers excellent electrical performance from DC to 18 GHz.SMA connector Figure 1. Standard male SMA plug connector: Male inner contact with a female connector body (inside threads). Type RF coaxial connector Specifications Diameter Male: 0.312 in (7.9 mm) HEX Cable Coaxial Passband Typically 0-18 GHz, some up to 26.5 GHz
Contents
Connector design
The SMA connector consists of a 0.250x36 thread. The male is equipped with a .312 inch (7.925mm) hex nut.
The outer shell of the male or plug connector has an inside thread and an inner pin, which can be confusing. In conventional SMA, the terms "male" and "female" refer exclusively to the inner pin or socket of the connectors. The male connector is also commonly referred to as a "plug", whereas the female connector is also known as a "socket" or "jack".
The SMA connector uses a polytetrafluoroethylene (PTFE) dielectric which will contact along the mating plane. Variability in the construction and the mating of the connectors limit the repeatability of the connector impedance. For that reason, an SMA connector is not a good choice for metrological applications.
SMA connectors are rated for 500 mating cycles, but to achieve this it is necessary to properly torque the connector when making the connection. A 5/16 inch torque wrench is required for this, set to 3-5 in·lbf (0.3 to 0.6 N·m) for brass, and 7-10 in·lbf (0.8–1.1 N·m) for stainless steel connectors. Flats are also provided on the cable side of the connector assembly so that a second wrench can be used to prevent it rotating and damaging the joint to the cable. It is also advisable to clean out loose debris from the internal surfaces with compressed air before mating.
Variations
The SMA connector is typically rated for mode-free operation from DC to 18 GHz, though some proprietary versions are rated to 26.5 GHz. For performance above this, SMA-like connectors are used. These are the 3.5 mm connector, rated to 34 GHz, and the 2.92 mm (also known as 2.9 mm), good up to 46 GHz. These connectors keep the same outside thread as the SMA, so they can all be cross-mated, however they use an air dielectric, with the center conductors appropriately scaled. However, the life of the precision connector will be reduced, and can be easily damaged when mating with low-grade SMA connectors.
Beyond 46 GHz, the 2.4 mm, 1.85 mm and the 1 mm connector exist. These are similar to the SMA connector, but with the geometries incompatibly scaled. These have mode-free operation to 50, 65, and 110 GHz respectively.
Reverse polarity SMA
Reverse polarity SMA (RP-SMA or RSMA) is a variation of the SMA connector specification which reverses the gender of the interface, as shown in Figures 1 and 2. The term "reverse polarity" here refers only to the gender of the connector's contact pin, not in any way to the signal polarity.Figure 2.Male RP-SMA (RP-SMA-M or RSMA-M) plug connector: Male inner pin (plug) contact with a male connector body (outside threads). A female RP-SMA connector (jack) is the opposite in both respects: It has a female inner pin contact with a female connector body (inside threads).
There is much confusion surrounding the description of Reverse Polarity connectors. The correct terminology refers to RP-SMA plugs and RP-SMA sockets, which are female and male respectively. However, non-technical people are much more at home with references to male and female. Thus, there is widespread use of terms RP-SMA male (socket), and RP-SMA Female (Plug).
The RP-SMA plug connector has the same external housing as a standard or conventional SMA plug connector, which consists of an outer shell with the thread on the inside; however, the internal prong or pin is replaced by a receptacle or female inner pin. Similarly, an RP-SMA male has a pin like a conventional male, but is housed in a socket rather than a standard plug connector. The RP-SMA female connector keeps the female receptacle, but is housed in a plug casing. In other words, the association of "plug" to "male" , and "socket" to "female" is reversed.
People at home with using the term "Reverse SMA Plug" often make the mistake of assuming "Reverse SMA Male" is the same thing, perpetuating the widespread misunderstanding. This has led to confusion due to the popular convention that connectors with pins are male.
RP-SMA connectors are widely used by Wi-Fi equipment manufacturers to comply with specific local regulations {Section 15.203 Antenna requirement}, e.g. the FCC, which are designed to make it difficult for consumers to connect antennas with gain and thereby breach compliance.
Male Pin Female Receptacle Inner Thread (outer nut/shell)
SMA Plug / SMA Male Reverse SMA Plug / Reverse SMA Female Outer Thread Reverse SMA Socket / Reverse SMA Male SMA Socket / SMA Female
[edit] See also
- SMB connector
- SMC connector
- TNC connector, also has RP-TNC version used for Wi-Fi
[edit] References
- Radio-frequency connectors. Part 15: R.F. coaxial connectors with inner diameter of outer conductor 4.13 mm (0.163 in) with screw coupling — Characteristic impedance 50 ohms (Type SMA). International Standard IEC 60169-15, 1979.
- CECC 22110/111
- Connectors, plug, electrical, radio frequency. Military specification sheet MIL-C-39012.
- 47 C.F.R. Section 15.203 Antenna requirements.
Good to know about TNT and SMA connector that is threaded neill concelman and sub miniature version A. This connector is a threaded version of the BNC connector. The connector has a 50 mega impedance and operates best in the 0–11 GHz frequency spectrum. Thanks for sharing this information....
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