Coaxial Couplers - Radiall - #9

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:5.00pt "Arial", sans-serif; } .font1 { font:6.00pt "Arial", sans-serif; } .font2 { font:7.00pt "Arial", sans-serif; } .font3 { font:8.00pt "Arial", sans-serif; } .font4 { font:11.00pt "Arial", sans-serif; } .font5 { font:12.00pt "Arial", sans-serif; } .font6 { font:13.00pt "Arial", sans-serif; } .font7 { font:22.00pt "Arial", sans-serif; } .font8 { font:6.00pt "Arial Black", sans-serif; } .font9 { font:8.00pt "Palatino Linotype", serif; } COAXIAL COUPLERS 5 - CATALOG TERMS AND CHARACTERISTICS OF TECHNICAL DATA DIRECTIONAL COUPLER A directional coupler is a transmission-line component characterized physically by two (or three, for certain bidirectional couplers) juxtaposed transmission lines and an associated coupling structure through which a transfer of RF energy from one to the other is effected; its electrical behavior is characterized ideally by such interaction between the two lines that excitation in a single direction in either line produces a response in the companion line in one, direction only. UNIDIRECTIONAL COUPLER An unidirectional coupler is a directional coupler so designed as to provide a nominal response in the secondary line to propagation in the primary line, in one direction only. BIDIRECTIONAL COUPLER A bidirectional coupler is a directional coupler so designed as to provide separate and simultaneous nominal responses in the secondary lines to each of the two directions of propagation in the primary line. PRIMARY LINE (MAIN LINE) The primary line of a directional coupler is the line designed to receive the principal flow of RF energy in the transmission line to which the directional coupler is adjunct. The input end of the primary line of a unidirectional coupler is the end into which power must flow in order to produce the maximum power at the output of the secondary line. The other end is called the output (antenna) end. SECONDARY LINE (COUPLED LINE) The secondary line of a directional coupler is the line that is coupled to the primary line by means of the coupling structure. In a unidirectional coupler îhere is one secondary line. In a bidirectional coupler the secondary lines have a nominal response to a différent direction of propagation in the primary line. In some bidirectional couplers the secondary lines are physically separate; in others they run physically together. UNIDIRECTIONAL COUPLER BIDIRECTIONAL COUPLER Coupled n port \S Output port Output port Output port Figure 1 J3. J4 : Coupled ports Figure 2 RADIALL The Quality Conneclton ® 10