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  2. Power dividers and directional couplers - Wikipedia

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

    This synonymously meant a quadrature 3 dB coupler with outputs 90° out of phase. Now any matched 4-port with isolated arms and equal power division is called a hybrid or hybrid coupler. Other types can have different phase relationships. If 90°, it is a 90° hybrid, if 180°, a 180° hybrid and so on.

  3. Marques Brownlee - Wikipedia

    en.wikipedia.org/wiki/Marques_Brownlee

    Brownlee's reviews have been promoted by review sites. Engadget promoted the site in January 2012 when they featured his tour of the then-new cloud storage service called Insync. [ 14 ] In November 2013, one of Brownlee's most viral videos was posted based on the LG G Flex , where he performed various scratch tests to demonstrate the self ...

  4. Rat-race coupler - Wikipedia

    en.wikipedia.org/wiki/Rat-race_coupler

    A rat-race coupler, also known as a hybrid ring coupler, is a type of coupler used in RF and microwave systems. In its simplest form, it is a 3 dB coupler and is thus an alternative to a magic tee .

  5. Customer review - Wikipedia

    en.wikipedia.org/wiki/Customer_review

    A customer review is an evaluation of a product or service made by someone who has purchased and used, or had experience with, a product or service. Customer reviews are a form of customer feedback on electronic commerce and online shopping sites.

  6. Reactances of synchronous machines - Wikipedia

    en.wikipedia.org/wiki/Reactances_of_synchronous...

    The air gap of the machines with a salient pole rotor is quite different along the pole axis (so called direct axis) and in the orthogonal direction (so called quadrature axis). Andre Blondel in 1899 proposed in his paper "Empirical Theory of Synchronous Generators" the two reactions theory that divided the armature magnetomotive force (MMF ...

  7. Orthogonal frequency-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_frequency...

    Each subcarrier (signal) is modulated with a conventional modulation scheme (such as quadrature amplitude modulation or phase-shift keying) at a low symbol rate. This maintains total data rates similar to conventional single-carrier modulation schemes in the same bandwidth.

  8. User review - Wikipedia

    en.wikipedia.org/wiki/User_review

    User reviews might be compared to professional nonprofit reviews from a consumer organization, or to promotional reviews from an advertiser or company marketing a product. Growth of social media platforms has enabled the facilitation of interaction between consumers after a review has been placed on online communities such as blogs , internet ...

  9. Mark Rogowski - Wikipedia

    en.wikipedia.org/wiki/Mark_Rogowski

    The California Board of Parole Hearings finalized the decision, and the case went before the California governor's staff for review. [18] On April 27, 2020, Rogowski's parole grant was reversed by Governor Gavin Newsom , stating Rogowski needed to gain a "deeper understanding" of his crimes, [ 19 ] possibly in reference to statements in which ...