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  2. Cellular repeater - Wikipedia

    en.wikipedia.org/wiki/Cellular_repeater

    A cellular repeater (also known as cell phone signal booster or cell phone signal amplifier) is a type of bi-directional amplifier used to improve cell phone reception. [citation needed] A cellular repeater system commonly consists of a donor antenna that receives and transmits signal from nearby cell towers, coaxial cables, a signal amplifier, and an indoor rebroadcast antenna.

  3. Power electronics - Wikipedia

    en.wikipedia.org/wiki/Power_electronics

    An HVDC thyristor valve tower 16.8 m tall in a hall at Baltic Cable AB in Sweden A battery charger is an example of a piece of power electronics. A PCs power supply is an example of a piece of power electronics, whether inside or outside of the cabinet.

  4. In-Building Cellular Enhancement System - Wikipedia

    en.wikipedia.org/wiki/In-Building_Cellular...

    Below ground level, large buildings and high rises are examples where mobile phones are unable to properly reach the carrier's macro or outdoor network. In these environments, the in-building cellular enhancement system will connect to the carrier's signal source which is typically a bi-directional amplifier or a base transceiver station.

  5. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    In figure 21, an example is shown of a signal split up to feed multiple low power amplifiers, then recombined to feed a single antenna with high power. [52] Figure 21. Splitter and combiner networks used with amplifiers to produce a high power 40 dB (voltage gain 100) solid state amplifier Figure 22. Phase arrangement on a hybrid power combiner.

  6. Small Form-factor Pluggable - Wikipedia

    en.wikipedia.org/wiki/Small_Form-factor_Pluggable

    BX (officially BX10) – 1490 nm/1310 nm, Single Fiber Bi-Directional Gigabit SFP Transceivers, paired as BX-U and BX-D for uplink and downlink respectively, also for distances up to 10 km. [22] [23] Variations of bidirectional SFPs are also manufactured which use 1550 nm in one direction, and higher transmit power versions with link length ...

  7. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    The nulls in the radiation pattern of small receiving loops and ferrite core antennas are bi-directional, and are much sharper than the directions of maximum power of either loop or of linear antennas, and even most beam antennas; the null directionality of small loops is comparable to the maximal directionality of large dish antennas (aperture ...

  8. Bi-amping and tri-amping - Wikipedia

    en.wikipedia.org/wiki/Bi-amping_and_tri-amping

    Vertical bi-amping uses two channels of an amplifier per loudspeaker, with a dedicated channel for the bass driver and a dedicated channel for the treble or the treble and the midrange post-amplifier together. Vertical bi-amping has the advantage of not having to use a single amp to power both bass sections, which can be very taxing on the ...

  9. Radio over fiber - Wikipedia

    en.wikipedia.org/wiki/Radio_over_fiber

    Electrical RF is directly connected to a TV or set-top box. 1550 nm is more popular because it has less losses in the fiber and by using fiber-optic amplifier known as EDFA it is possible to extend the transport distance. 1310 nm loses about 0.35 dB/km of optical signal, 1550 nm loses only 0.25 dB/km. Optical budget between transmitter and ...

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