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Type | RF coaxial connector | ||
---|---|---|---|
Production history | |||
Designed | 1991[1] | ||
Manufacturer | Hirose Electric Group | ||
General specifications | |||
Diameter | 2.0 mm (0.079 in) | ||
Cable | Coaxial | ||
Passband | Typically 0-6 GHz |
An embedded RouterBoard 112 with U.FL-RSMA pigtail and R52 miniPCIWi-Fi card.
Hirose U.FL, I-PEX MHF series, IPAX, IPX,[2]AMC[3] and UMCC (Ultraminiature Coax Connector and Cable Assembly Style A Series from Tyco Electronics) is a miniature RF connector for high-frequency signals up to 6 GHz manufactured by Hirose Electric Group[4] and others.
U.FL connectors are commonly used in applications where space is of critical concern, most often Mini PCI cards for laptop computers. U.FL connectors are commonly used inside laptops and embedded systems to connect the Wi-Fi antenna to a Mini PCI card. Another common use is connecting GPS antennas.
Female U.FL connectors are not designed with reconnection in mind, and they are only rated for a few reconnects (approximately 30 mating cycles[5]) before replacement is needed. The female U.FL connectors are generally not sold separately, but rather as part of a pigtail with a high-quality 1.32 mm doubly shielded cable, which allows for a low-loss connection.
The male connectors are surface-mounted and soldered directly to the printed circuit board. They are designed to have a characteristic impedance of 50 ohms. The mated connection is only 2.5 mm high and takes as little as 9 mm2 (3.0 × 3.1 mm2) of board space.[6][7]
Much like many other electronic components, Hirose U.FL connectors were protected by patents[1] and trademarks. However, compatible third party connectors are available.
See also[edit]
External links[edit]
References[edit]
- ^ abSurface-mounted, high-frequency coaxial connector. US Patent 5180315 (1993)
- ^Lighthorse Technologies INC catalog
- ^'AMC Ultra Miniature Connectors | Amphenol RF'. www.amphenolrf.com. Retrieved 2018-10-15.
- ^Ultra Small Surface Mount Coaxial Connectors - Low Profile 1.9 mm or 2.4 mm Mated HeightU.FL Series. Hirose data sheet.
- ^SMT Ultra-Miniature Coaxial Connectors - Product Specifications
- ^IPX datasheet
- ^'U.FL and W.FL Series Connectors - Hirose │ DigiKey'. www.digikey.hk. Retrieved 7 November 2019.
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Retrieved from 'https://en.wikipedia.org/w/index.php?title=Hirose_U.FL&oldid=927490232'
Type | RF coaxial connector | ||
---|---|---|---|
Production history | |||
Designer | Eric E. Winston | ||
Designed | Early 1950s | ||
Manufacturer | Various | ||
General specifications | |||
Diameter |
| ||
Cable | Coaxial | ||
Passband | From 0Hz to, at least, 2.15GHz |
The F connector (also F-type connector) is a coaxialRF connector commonly used for 'over the air' terrestrial television, cable television and universally for satellite television and cable modems, usually with RG-6/U cable or, in older installations, with RG-59/U cable.
The F connector was invented by Eric E. Winston in the early 1950s while working for Jerrold Electronics on their development of cable television.[1] In the 1970s, it became commonplace on VHF, and later UHF, television antenna connections in the United States, as coaxial cables replaced twin-lead.
It is now specified in IEC 60169 Radio-frequency connectors, part 24[a].
- 1Description
Description[edit]
The F connector is an inexpensive, gendered, threaded, compression connector for radio frequency signals. It has good 75 Ω impedance match for frequencies well over 1 GHz[2] and has usable bandwidth up to several GHz.
Connectors mate using a 3⁄8in-32 unified extra fine (UNEF) thread. The female connector has a socket for the center conductor and external threads. The male connector has a center pin, and a captive nut with internal threads.
The design allows for low-cost construction, where cables are terminated almost exclusively with male connectors. The coaxial cable center conductor forms the pin, and cable dielectric extends up to the mating face of the connector. Thus, the male connector consists of only a body, which is generally crimped onto or screwed over the cable shielding braid, and a captive nut, neither of which require tight tolerances. Push-on versions are also available.
Female connectors are typically used on bulkheads or as couplers, often being secured with the same threads as for the connectors. Thus can be manufactured as a single piece, with center sockets and dielectric, entirely at the factory where tolerances can easily be controlled.
This design is subject to the surface properties of the inner conductor (which must be solid wire, not stranded) and is not corrosion resistant. Hence waterproof versions are needed for outside use (for example, on antennas). Corrosion resistance, reliability of connector electrical conduction and water resistance can be improved by coating all bare copper wires and the connectors themselves with silicone grease. [3]
Weatherproofing[edit]
The F connector is not weatherproof. Neither the threads nor the joint between male connector body and captive nut seal. However, male connectors are commonly enhanced with an o-ring (of about 7mm) inside the captive nut. This seals between the mating faces of both connectors, providing good waterproofing for the center conductor.
Usage[edit]
The cable and satellite television entities (as a near standard practice) use compression fittings with F connectors on customer premises. In Europe, block down-converted satellite signals (950–2150 MHz) from LNBs and DC power and block signalling from satellite receivers are near exclusively passed through F connectors.[4]
F connectors are probably the most suitable for domestic terrestrial, cable, and satellite TV installations where the delivery of very high frequency information is required. Belling-Lee connectors (IEC 169-2; used on European terrestrial receivers) are not well suited for long-haul building delivery of frequencies above 500MHz, because the standard was designed around tube receivers and mediumwave (or shortwave) antennas (but workarounds[clarification needed] exist).[5] F connectors require slightly more care to properly install the male connectors to the cable than the Belling-Lee type, with the exception of compression or flex type connections.
Flex F connectors[edit]
Push-on (aka Flex) F connectors provide poorer shielding against microwave signals of high field strength. This leakage problem is more an artifact of bent or partly broken push on connectors, but is mostly not observed with compression connectors. Nearby television, FM radio, mobile & cordless phones, government radiolocation (54–1,002 MHz)[6] transmitters can potentially interfere with a CATV or DTH Satellite reception or operation if the Flex connector poorly installed.
- F connectors attached to a 4-way DiSEqC switch.
- A visual collection of standard and right-angle coaxial F connectors, a commonly used but less documented form of the F connector.
Notes[edit]
- ^Radio frequency coaxial connectors with screw coupling, typically for use in 75 ohm cable networks (type F)
See also[edit]
References[edit]
- ^Electrical Connector. US Patent 3,537,065 by Eric Winston
- ^IEC 60169-24: 'Radio-frequency connectors - Part 24: Sectional specification - Radio frequency coaxial connectors with screw coupling, typically for use in 75 Ω cable networks (type F).' (2009) [1]
- ^'Dielectric Grease vs. Conductive Grease'. www.w8ji.com.
- ^'Understanding lnb specifications'(PDF). SatCritics Technicals. 2002-11-15. Retrieved 2017-11-29.
- ^'How to wire a Belling-Lee connector'. www.megalithia.com.
- ^Cityfreq United States Scanner Frequencies, Phone Numbers, and IP Addresses.
![Removal tool antenna rf connectors Removal tool antenna rf connectors](/uploads/1/2/5/8/125832404/834730200.jpg)
Further reading[edit]
- 'F' Port (Female Indoor) Physical Dimensions, ANSI/SCTE 02 2015 (see www.scte.org).
External links[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=F_connector&oldid=934303445'