MIL-DTL-15370K, DETAIL SPECIFICATION: COUPLERS, DIRECTIONAL GENERAL SPECIFICATION FOR (15-DEC-2015)

MIL-DTL-15370K, DETAIL SPECIFICATION: COUPLERS, DIRECTIONAL GENERAL SPECIFICATION FOR (15-DEC-2015)., This specification covers the general requirements for radio and microwave frequency directional couplers (see 6.1). Directional couplers may be used in conjunction with a radio-frequency source for injecting a radio-frequency wave into a transmission line so that it flows in one direction only. Directional couplers may also be used to sample a radio-frequency wave flowing in a particular direction in a transmission line while accepting relatively insignificant portions of a radio-frequency wave flowing in the opposite direction. 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.