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      Directional type of coupler Shi Huabeng

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      Directional type of coupler Shi Huabeng

      Release date:2015-06-15 15:37 Source:http://www.biricikmaket.com Views:

      The directional coupler of the petrochemical pump is a four port element with directional transmission characteristics, which is composed of two pairs of transmission system which is linked with the coupling device.. Firstly, introduces the performance index of directional coupler, and then introduces the double waveguide directional coupler, double branch directional coupler and parallel coupled microstrip directional coupler.

      1) directional coupler performance index

      Directional couplers are four port network, port "for input port" II "is a straight through the output port" 3 "for the coupling output port" 4 "for the end of the isolation and the scattering matrix [S]. The performance index of directional coupler is: coupling degree, isolation degree, orientation degree, input Bobbi and working bandwidth. Below were introduced.

      2) isolation

      The output power of the P4 input "input power P1 and isolation" 4 "end is defined as the ratio of isolation, denoted as I.

      The orientation degree

      The output power of P4 coupling end "the" output power of P3 and isolation "the end" is defined as the degree of orientation, denoted as D.

      The input in Bobbi

      Port "2, 3, 4" are connected to the load matching the input port of the "voltage standing wave ratio (VSWR) is defined as the input VSWR, denoted as P.

      The operating bandwidth

      The working bandwidth is the frequency range that the C, I, D directional coupler, P parameters can satisfy the requirements of the.

      Fiber coupler is removing (activities) connection device between optical fiber and optical fiber, it is the fiber of two surface precision docking, such that the transmitted optical output of the light energy to maximize the coupling to the receiving optical fiber, and so involved in the optical link to the system caused by the impact is reduced to a minimum. As for the waveguide type fiber coupler, it is generally an element with a type Y type, which can be divided equally by a light signal input of a fiber.. When the coupler branch of open angle increases, to the cladding of the leakage of light will increase resulting in increased excess loss, so open angle general in less than 30 degrees, so the length of waveguide type optical fiber coupler can not be too short.

      According to the different uses, the hydraulic coupler is divided into the ordinary type hydraulic coupler, the limited moment hydraulic coupler and the speed governing type hydraulic coupler. The torque limited hydraulic coupler is mainly used for the reducer of motor starting protection and operation of impact protection, position compensation and energy buffer; governor hydraulic coupler is mainly used for adjusting input and output speed ratio, other function and torque limited hydraulic coupler is basically the same. Shi Huabeng


      pump Shi Huabeng

      Related tags:condensatepump

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      日本免费av一区二区三区

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