3results about How to "Good Common Mode Rejection" patented technology

The present invention discloses a balanced-unbalanced one-to-three filter power divider with non-reflection characteristics, comprising: a balanced differential input port, an unbalanced output port, a balanced end non-reflection absorption matching network, two sections of quarter-wavelength filter power splitter coupling lines, two sections of quarter-wavelength anti-connected wiring, two sections of quarter-wavelength signal transmission lines, two groups of zero-point transmission branches, two sections of quarter-wavelength equal power distribution lines and a phase compensation structure. The balanced-unbalanced one-to-three filter power divider with non-reflection characteristics provided by the present invention simultaneously realizes highly selective filtering characteristics, conversion function from balanced differential signals to unbalanced single-ended signals, good common-mode suppression, three-way broadband equal power distribution, ±90-degree output signal phase difference characteristics and balanced end input non-reflection characteristics, and is very suitable for application in various types of balanced-unbalanced microwave systems and circularly polarized antennas to improve their overall performance.

This invention discloses a miniaturized balanced-single-ended 180° hybrid coupler, belonging to the field of radio frequency and microwave technology. It includes: a stacked dielectric substrate, and a differential-end balanced feed unit, a symmetrical short-circuit stepped impedance ring, a center-loaded short-circuit stub, a sum-end balanced feed group, a first single-port, and a second single-port, all disposed within the dielectric substrate. The differential-end balanced feed unit and the symmetrical short-circuit stepped impedance ring are connected by a short circuit at one half to form two sets of wide-side coupled striplines, creating an anti-phase coupled transmission path. The sum-end balanced feed group and the center-loaded short-circuit stub at the symmetrical midpoint of the symmetrical short-circuit stepped impedance ring form a three-wire coupling, creating an in-phase coupled transmission path. The first and second single-ports are connected to two impedance transformation nodes of the symmetrical short-circuit stepped impedance ring for input / output of equal-amplitude in-phase or equal-amplitude out-of-phase single-ended signals. This invention integrates balanced-single-ended conversion, broadband filtering, high common-mode rejection, and compact packaging into a single unit.

The present invention discloses a balanced-unbalanced power divider with broadband non-reflection filtering characteristics, comprising: a balanced differential signal input port A, two unbalanced end signal output ports, two non-reflection filtering power division networks, two sections of quarter-wavelength anti-connected wiring, two sections of quarter-wavelength signal transmission lines and an isolation network. The device realizes highly selective filtering characteristics, conversion function from balanced differential signals to unbalanced single-ended signals, good common-mode suppression, two-way broadband equal power distribution, 180-degree output signal phase difference characteristics, and both the balanced end and the unbalanced single end have broadband non-reflection filtering characteristics. The device is very suitable for application in various balanced-unbalanced microwave systems to improve their overall performance.