sonofsky
Junior Member level 2
I've read several research papers about full waveguide band MMIC tripler for W-band, recently. Such as 《A W-band GCPW MMIC Diode tripler》、《A Full Waveguide Band tripler for 75-110GHz》……
In these papers, the simple open-circuited stubs were used to present an approximate short-circuit at the diodes from 75-110GHz, and provides frequency isolation as well as a ground-return for the output.
In my opinion, the quarter wavelength open stub can present short-circui in a narrow band, since the tripler is for full waveguide band, that is to say, it is broadband, so why the quarter wavelength open stubs were chosen??
In these papers, the simple open-circuited stubs were used to present an approximate short-circuit at the diodes from 75-110GHz, and provides frequency isolation as well as a ground-return for the output.
In my opinion, the quarter wavelength open stub can present short-circui in a narrow band, since the tripler is for full waveguide band, that is to say, it is broadband, so why the quarter wavelength open stubs were chosen??
