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An F-Connector [1] is a coaxial cable [2] connector designed for radio
frequencies up to 2 GHz (although some are available for up to 3 GHz),
running over 75 Ohm cable.
It's most common use is for CATV [3] (frequencies normally up to 900
MHz, although Telstra has prepared for frequencies up to 1 GHz) and
SMATV [4] (frequencies between 900 MHz and 2150 MHz). Anyone who has
Cable-Television or Cable-Internet [5] services would see these
connectors on the cable connecting their set-top-unit/cable modem [6]
to their respective wall-socket.
F-Connectors [7] are becoming popular in professional MATV [8]
installations due to their superior quality over PAL-Connectors [9].
F-Connectors [10] should not be used for Wireless LAN [11]
applications, since they are poor quality connectors for anything
other than reception. Although higher quality F-Connectors [12] are
appearing on the market to satisfy the demands of CATV [13] networks
operating interactive broadband cable internet services, and digital
television (DVB-C [14]), they should still be avoided.
The problem is primarily due to the fact that the copper core of the
cable itself is commonly the conducting pin in the connector, and
doesn't provide solid mating, or accurate impedance matching,
resulting in a poor VSWR [15]. To add to this, the threaded ring which
holds the connector together also provides the ground/sheild
connection. This threaded ring is problematic due to vibration, dust,
and temperature fluctuations, and professionals will almost always
lightly tighten it with a spanner or wrench.
For Wireless LAN [16], you should use N-Connectors [17]. Some
European CATV [18] networks are switching to 75 Ohm BNC Connectors
[19] due since they last longer, and can cope with the demands being
placed on their networks by a vast array of digital services.
Links:
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[1] http://www.melbournewireless.org.au/?FConnector
[2] http://www.melbournewireless.org.au/?CoaxialCable
[3] http://www.melbournewireless.org.au/?CATV
[4] http://www.melbournewireless.org.au/?SMATV
[5] http://www.melbournewireless.org.au/?Internet
[6] http://www.melbournewireless.org.au/?CableModem
[7] http://www.melbournewireless.org.au/?FConnector
[8] http://www.melbournewireless.org.au/?MATV
[9] http://www.melbournewireless.org.au/?PALConnector
[10] http://www.melbournewireless.org.au/?FConnector
[11] http://www.melbournewireless.org.au/?WLAN
[12] http://www.melbournewireless.org.au/?FConnector
[13] http://www.melbournewireless.org.au/?CATV
[14] http://www.melbournewireless.org.au/?DVB
[15] http://www.melbournewireless.org.au/?VSWR
[16] http://www.melbournewireless.org.au/?WLAN
[17] http://www.melbournewireless.org.au/?NConnector
[18] http://www.melbournewireless.org.au/?CATV
[19] http://www.melbournewireless.org.au/?BNCConnector
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