1 results about "Degenerate mode" patented technology

A broadband, low-error on-chip coupler based on quasi-degenerate mode technology includes: multiple stacked ground layers on the chip, and a first coil and a second coil coupled to each other on the top ground layer. The coils are not in contact with the ground layers. The two ends of the first coil are connected to an input port and a through port, respectively. The two ends of the second coil are connected to an isolation port and a coupling port, respectively. The ground layers are connected to an external ground level. This invention can accurately anchor the product of even-mode and odd-mode impedances to a 50Ω system impedance while achieving a quasi-degenerate mode state for the even-mode and odd-mode, i.e., keeping the phase constants of the even-mode and odd-mode close within the target frequency band, thus solving the phase mismatch problem in the broadband range. Experimental results show that in the 80–120 GHz frequency band, the phase difference between the output signals of the through port and the coupling port remains within ±1.1° compared to 90°, achieving orthogonal characteristics.