The present disclosure relates to an analog phase shifter for mitigating transmission losses. The analog phase shifter includes a multi-port network including an input port for inputting an RF signal and an output port for outputting a phase-changed RF signal. The analog phase shifter further includes a hybrid coupler configured to operably couple the input port and the output port to a plurality of load ports. The analog phase shifter additionally includes tunable reflective loads coupled to the hybrid coupler through the plurality of load ports. Load values of the tunable reflective loads are tuned by applying a plurality of independent voltages.

The present disclosure relates to an analog phase shifter for mitigating transmission losses. The analog phase shifter includes a multi-port network including an input port for inputting an RF signal and an output port for outputting a phase-changed RF signal. The analog phase shifter further includes a hybrid coupler configured to operably couple the input port and the output port to a plurality of load ports. The analog phase shifter additionally includes tunable reflective loads coupled to the hybrid coupler through the plurality of load ports. Load values of the tunable reflective loads are tuned by applying a plurality of independent voltages.

A high speed circuit assembly includes a high speed circuit including at least one transmission line extending to a transmission line end, and radar absorbing material disposed adjacent the transmission line.

A high speed circuit assembly includes a high speed circuit including at least one transmission line extending to a transmission line end, and radar absorbing material disposed adjacent the transmission line.

An input waveguide (6) having one end connected between an L-shaped waveguide (1a) and an L-shaped waveguide (1f) and another end connected to the PORT (1); an output waveguide (7) having one end connected between the L-shaped waveguide (1a) and a flat waveguide (1b) and another end connected to the PORT (2); an output waveguide (8) having one end connected between the flat waveguide (1b) and an L-shaped waveguide (1c) and another end connected to the PORT (3); an output waveguide (9) having one end connected between the L-shaped waveguide (1c) and an L-shaped waveguide (1d) and another end connected to the PORT (4); and a plurality of branching waveguides (10) each having one end connected to the output waveguide (7) and another end connected to the output waveguide (8) are provided.

An input waveguide (6) having one end connected between an L-shaped waveguide (1a) and an L-shaped waveguide (1f) and another end connected to the PORT (1); an output waveguide (7) having one end connected between the L-shaped waveguide (1a) and a flat waveguide (1b) and another end connected to the PORT (2); an output waveguide (8) having one end connected between the flat waveguide (1b) and an L-shaped waveguide (1c) and another end connected to the PORT (3); an output waveguide (9) having one end connected between the L-shaped waveguide (1c) and an L-shaped waveguide (1d) and another end connected to the PORT (4); and a plurality of branching waveguides (10) each having one end connected to the output waveguide (7) and another end connected to the output waveguide (8) are provided.

In accordance with some embodiments, non-reciprocal circulators are provided, the circulators comprising: a 3X/4-long ring section having a first end and a second end, wherein is an operating wavelength of the non-reciprocal circulator; and a N-path filter having a first port, a second port, and N-paths, each of the N-paths being connected to the first port and the second port. In some of these embodiments, the 3/4-long ring section includes a transmit port, an antenna port, and a receive port. In some of these embodiments, the transmit port is /4 away from the antenna port. In some of these embodiments, the antenna port is /4 away from the receive port. In some of these embodiments, the receive port is at the first port of the N-path filter.

A demultiplexer/multiplexer includes an input terminal, which receives input signals from respective phases of a quadrifilar helix antenna; phase shifter/separator/mixers, which alternately phase-shift right-handed and left-handed circularly polarized waves of the input signals, respectively, by 90/90 to produce phase-shifted waves to be combined in an inphase combination; phase shifter/mixers, which receive the left-handed or right-handed circularly polarized waves from the phase shifter/separator/mixers, and phase-shift one of the left-handed and right-handed circularly polarized waves by 180/180 to produce a phase-shifted wave to be combined with the other of the left-handed and right-handed circularly polarized waves in an antiphase combination; a variable phase shifter, which adjusts an output signal from the phase shifter/mixers by a phase-shift amount that is received in advance; and an output terminal, which outputs an output signal from the variable phase shifter and the other output signal that is not input to the variable phase shifter.

A demultiplexer/multiplexer includes an input terminal, which receives input signals from respective phases of a quadrifilar helix antenna; phase shifter/separator/mixers, which alternately phase-shift right-handed and left-handed circularly polarized waves of the input signals, respectively, by 90/90 to produce phase-shifted waves to be combined in an inphase combination; phase shifter/mixers, which receive the left-handed or right-handed circularly polarized waves from the phase shifter/separator/mixers, and phase-shift one of the left-handed and right-handed circularly polarized waves by 180/180 to produce a phase-shifted wave to be combined with the other of the left-handed and right-handed circularly polarized waves in an antiphase combination; a variable phase shifter, which adjusts an output signal from the phase shifter/mixers by a phase-shift amount that is received in advance; and an output terminal, which outputs an output signal from the variable phase shifter and the other output signal that is not input to the variable phase shifter.

An electronic device may include isolation circuitry coupled between a transmitter, a receiver, and one or more antennas. The isolation circuitry may include a 90 degree hybrid coupler configured receive a transmission (TX) signal from the transmitter, split the TX signal into a first portion and a second portion, and phase-shift a portion such that the portions are +90 degrees out-of-phase. The isolation circuitry may include phase shifters that phase-shift the portions such that the portions are in-phase prior to propagating to the antenna. The phase shifters may receive a first portion and a second portion of a receiver (RX) signal from splitter circuitry. The phase shifters may phase-shift the portions such that the portions are out-of-phase by ?90 degrees. The 90 degree hybrid coupler may phase-shift the first portion and/or the second portion such that the portions are in-phase and constructively combine prior to propagating to the receiver.