Home › Forums › Bug Reports › Problems with 180_degree hybrid model Tagged: Bad Model This topic has 2 replies, 2 voices, and was last updated 3 years ago by QucsStudio. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts 29. November 2020 at 5:52 #672 Jess_StuartParticipant The 180-deg hybrid coupler model included with Qucsstudio does not work correctly. I’ve included a schematic and a diagram showing the 4 basic configurations in which 180-deg hybrids can be used (which can be verified against component datasheets). 29. November 2020 at 5:55 #673 Jess_StuartParticipant Upload was too big. Scaled down the image and retried attaching zip file. Attachments: 180deg_hybrid.zip 29. November 2020 at 17:17 #675 QucsStudioKeymaster The 180-deg hybrid coupler works in frequency-domain only. So please use the AC or s-parameter analysis. A time-domain model for this component does not exist, because its Fourier transformation has a pole. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic.