紧凑的L波段LTCC多层环形耦合器: Compact LTCC Rat-Race Couplers.pdf

Abstract—In this paper, compact low-temperature co-fired ceramic
(LTCC) rat-race couplers are developed using multilayered
phase-delay and phase-advance T-equivalent sections.

都是ltcc的好东西

LTCC工艺等要好好琢磨一下了。辛苦了楼主，{:7_1234:}

Thanks~