The present disclosure relates to a tunable waveguide filter input/output coupling arrangement comprising a waveguide part, a coupling iris part and a tunable filter part. The waveguide part runs along a longitudinal extension and has a waveguide width extending perpendicular to the longitudinal extension, and is electrically connected to the tunable filter part by means of the coupling iris part which comprises an opening between the waveguide part and the tunable filter part. The opening is positioned at a certain position along the longitudinal extension. The waveguide part comprises a stub part that has a certain stub length along the longitudinal extension, between an electrical short-circuit end plate and an edge of the opening that is closest to the end plate, where the stub part also has a stub width extending perpendicular to the longitudinal extension.

The present disclosure relates to a tunable waveguide filter input/output coupling arrangement comprising a waveguide part, a coupling iris part and a tunable filter part. The waveguide part runs along a longitudinal extension and has a waveguide width extending perpendicular to the longitudinal extension, and is electrically connected to the tunable filter part by means of the coupling iris part which comprises an opening between the waveguide part and the tunable filter part. The opening is positioned at a certain position along the longitudinal extension. The waveguide part comprises a stub part that has a certain stub length along the longitudinal extension, between an electrical short-circuit end plate and an edge of the opening that is closest to the end plate, where the stub part also has a stub width extending perpendicular to the longitudinal extension.

The present disclosure relates to a filter for filtering wavelengths of an electromagnetic signal to provide a filtered signal. The filter includes: at least one commensurate-line structure (CLS); and, at least one stub-modified commensurate-line structure (SMCLS) arranged to provide a corresponding at least one transmission zero in the filtered signal.

A waveguide coupler includes a waveguide having a first and a second port, and a slot formed in a broadwall of the waveguide between the first and second ports, the slot centered on the first broadwall. A plurality of shifted waveguide sections are arranged between the first and second ports and extend along a length of the waveguide. A parallel-plate transmission line structure is coupled to the slot, wherein RF signals within one of the waveguide or the parallel-plate transmission line are communicated to the other of the waveguide and the parallel-plate transmission line through the slot.

A low-profile CTS flat-plate array antenna includes a radiating layer, a mode switching layer and a feed network layer which are sequentially arrayed from top to bottom. The mode switching layer comprises a first metal plate and a mode switching cavity array arranged on an upper surface of the first metal plate and comprising 2.sup.2n mode switching cavities arrayed in 2.sup.n rows and 2.sup.n columns, wherein n is an integer greater than or equal to 1. Each mode switching cavity includes a first rectangular cavity, a second rectangular cavity, a third rectangular cavity, a fourth rectangular cavity and a fifth rectangular cavity which are sequentially connected from left to right. The 2.sup.n mode switching cavities located in each row are sequentially connected end to end.

A waveguide coupler includes a waveguide having a first and a second port, and a slot formed in a broadwall of the waveguide between the first and second ports, the slot centered on the first broadwall. A plurality of shifted waveguide sections are arranged between the first and second ports and extend along a length of the waveguide. A parallel-plate transmission line structure is coupled to the slot, wherein RF signals within one of the waveguide or the parallel-plate transmission line are communicated to the other of the waveguide and the parallel-plate transmission line through the slot.

Conventional coaxial wiring devices present a problem in that the management of the manufacturing process therefor is difficult. A coaxial wiring device according to the present invention includes a first member, a second member, and a conductor plate. The first member (10) and the second member (30) include, when a line that connects a first port and a second port is denoted by a reference line, a first groove (11) that has a central point on the reference line and extends in a direction that intersects with the reference line; a second groove (12) that connects one end (FN1) of the first groove (11) and the first port; a third groove (13) that connects the other end (FN2) of the first groove (11) and the first port and has a shape that is line symmetrical to the second groove (12) with respect to the reference line; a fourth groove (14) that connects one end (FN1) of the first groove (11) and the second port; and a fifth groove (15) that connects the other end (FN2) of the first groove (11) and the second port and has a shape that is line symmetrical to the fourth groove (14) with respect to the reference line.

Conventional coaxial wiring devices present a problem in that the management of the manufacturing process therefor is difficult. A coaxial wiring device according to the present invention includes a first member, a second member, and a conductor plate. The first member (10) and the second member (30) include, when a line that connects a first port and a second port is denoted by a reference line, a first groove (11) that has a central point on the reference line and extends in a direction that intersects with the reference line; a second groove (12) that connects one end (FN1) of the first groove (11) and the first port; a third groove (13) that connects the other end (FN2) of the first groove (11) and the first port and has a shape that is line symmetrical to the second groove (12) with respect to the reference line; a fourth groove (14) that connects one end (FN1) of the first groove (11) and the second port; and a fifth groove (15) that connects the other end (FN2) of the first groove (11) and the second port and has a shape that is line symmetrical to the fourth groove (14) with respect to the reference line.

A waveguide filter includes a fundamental waveguide unit. The fundamental waveguide unit may have an irregular hexagonal metal structure. One wall of the irregular hexagonal metal structure may form a connection to one or more walls of another fundamental waveguide unit having an irregular hexagonal metal structure. A fundamental waveguide unit may include a hollow irregular hexagonal metal structure which includes a resonant cavity that receives an electromagnetic signal and propagates the signal through the resonant cavity.

A group delay compensation filter includes: a waveguide that has a first slot and that is configured to transmit a signal; and a first dielectric resonator that includes: a first dielectric, a first metal layer formed over a surface of the first dielectric, and a first opening provided in the first metal layer, wherein the first dielectric resonator is in contact with the waveguide with the first opening coupled to the first slot, and wherein the first dielectric resonator is configured to compensate group delay in a first frequency band of the signal.