EXPERIMENTAL-EVIDENCE OF MOUNTING GROOVES AND SERRATION PATTERNS ON FIN LINES CHARACTERISTICS

In this paper, the mounting grooves and serration patterns of fin line circuits are investigated experimentally. Our measurements show that the short-circuit ended mounting grooves degrade seriously the inserti on loss of fin lines at the low frequencies of the band. The open ende d mounting grooves are found better for fin lines applications and mea surements. An improvement of 0.7 dB is observed over the whole band, w hen the serration patterns of the fin line are placed into the open-en ded mounting grooves. These results can be used for measuring the loss es and for designing transitions or other fin line circuits.