A routing structure of a two-core parallel shielded electric wire includes: two insulated electric wires that are arranged in parallel; and a shield layer that is attached around the two insulated electric wires and extends in a longitudinal direction of the two insulated electric wires.

In the routing structure, the two-core parallel shielded electric wire is rerouted by bent twisting the two-core parallel shielded electric wire in a short axis direction at a route change point along a long axis direction of the two-core parallel shielded electric wire, and the number of bent twisted points in the short axis direction is 1.43 or less per meter.

A routing structure of a two-core parallel shielded electric wire includes: two insulated electric wires that are arranged in parallel; and a shield layer that is attached around the two insulated electric wires and extends in a longitudinal direction of the two insulated electric wires.

In the routing structure, the two-core parallel shielded electric wire is rerouted by bent twisting the two-core parallel shielded electric wire in a short axis direction at a route change point along a long axis direction of the two-core parallel shielded electric wire, and the number of bent twisted points in the short axis direction is 1.43 or less per meter.

In an example embodiment, an azimuth combiner comprises: a septum layer comprising a plurality of septum dividers; first and second housing layers attached to first and second sides of the septum layer; a linear array of ports on a first end of the combiner; wherein the first and second housing layers each comprise waveguide H-plane T-junctions; wherein the waveguide T-junctions can be configured to perform power dividing/combining; and wherein the septum layer evenly bisects each port of the linear array of ports. A stack of such azimuth combiners can form a two dimensional planar array of ports to which can be added a horn aperture layer, and a grid layer, to form a dual-polarized, dual-BFN, dual-band antenna array.

In an example embodiment, an azimuth combiner comprises: a septum layer comprising a plurality of septum dividers; first and second housing layers attached to first and second sides of the septum layer; a linear array of ports on a first end of the combiner; wherein the first and second housing layers each comprise waveguide H-plane T-junctions; wherein the waveguide T-junctions can be configured to perform power dividing/combining; and wherein the septum layer evenly bisects each port of the linear array of ports. A stack of such azimuth combiners can form a two dimensional planar array of ports to which can be added a horn aperture layer, and a grid layer, to form a dual-polarized, dual-BFN, dual-band antenna array.

The present disclosure relates to a tunable waveguide system comprising a waveguide configured to guide radio waves in at least two dimensions, and an electronically tunable metamaterial configured to tune the radio waves by electronically changing its dielectric and/or conductive characteristics. The present disclosure further relates to a radar antenna system.

The present application concerns a tunable differential transmission line segment, comprising a differential pair of signal line segments (10) arranged in a first plane. A pair of tuning line segments (20) is arranged in a second plane substantially parallel to the first plane, wherein the pair of tuning line segments (20) is at least capacitively coupled to the differential pair of signal line segments (10). The pair of tuning line segments (20) is connected with its respective end terminals (22, 23) to a common reference potential and further comprises a tunable element (24, 25) arranged between a first portion (26) and a second portion (27) of the pair of tuning line segments (20) and configured to change the impedance of the pair of tuning line segments (20).

The present application concerns a tunable differential transmission line segment, comprising a differential pair of signal line segments (10) arranged in a first plane. A pair of tuning line segments (20) is arranged in a second plane substantially parallel to the first plane, wherein the pair of tuning line segments (20) is at least capacitively coupled to the differential pair of signal line segments (10). The pair of tuning line segments (20) is connected with its respective end terminals (22, 23) to a common reference potential and further comprises a tunable element (24, 25) arranged between a first portion (26) and a second portion (27) of the pair of tuning line segments (20) and configured to change the impedance of the pair of tuning line segments (20).

Described is a frequency selective limiter (FSL) module comprising a cascade of an FSL and a functional limiter (e.g. a conventional semiconductor limiter comprising a PIN diode) with steady state limiting and power threshold values selected such the FSL module provides suppression of a spike leakage power and while still enabling frequency selective limiting.

Described is a frequency selective limiter (FSL) module comprising a cascade of an FSL and a functional limiter (e.g. a conventional semiconductor limiter comprising a PIN diode) with steady state limiting and power threshold values selected such the FSL module provides suppression of a spike leakage power and while still enabling frequency selective limiting.

A rotary joint includes a shaft having a first end, a second end, and a cavity. The rotary joint includes a first waveguide section having a first proximal end and a first distal end. The first proximal end of the first waveguide section is positioned within the cavity and secured to the inner surface of the shaft. The rotary joint includes a second waveguide section that includes a second proximal end and a second distal end. The second proximal end of the second waveguide section is positioned within the cavity of the shaft and unsecured to the inner surface of the shaft to form a radial gap between an outer surface of the second proximal end and a laterally adjacent portion of the inner surface of the shaft. The shaft and the first waveguide section are configured to rotate about the rotational axis and relative to the second waveguide section.