A small cell includes a housing and an antenna support bracket mountable within the housing. The bracket includes a base member and a flange member. The base member supports a substrate of an antenna. The flange member is positioned along a first edge of the base member and extends away from the base member in a first direction. The flange member includes at least one generally hook-shaped arm member configured to engage a hook receiving element integrated with or attached to a sidewall of the small cell housing. The antenna support bracket may further include a second flange member positioned along a second edge of the base member and extending in a second direction opposite to the first direction. A non-conductive spacer may be adhered to a surface of the second flange member to provide electrical isolation between an electrically conductive fastener and the surface of the second flange member.

A coaxial feed for multiband antenna for a multiband antenna includes: a tubular high-band (HB) waveguide, the HB waveguide including an outer conducting surface, an inner HB conducting surface, and a HB aperture defined by the inner HB conducting surface; a tubular low-band (LB) waveguide disposed coaxially around the HB waveguide, the LB waveguide including an outer feed surface, an inner LB conducting surface, and an annular LB aperture defined by the inner LB conducing surface and the outer conducting surface of the HB waveguide; and an annular high-band (HB) choke located in the outer conducting surface of the HB waveguide, the HB choke being axially offset from the HB aperture.

Provided is a waveguide feeder. The waveguide feeder includes: a probe aligned at a center of a waveguide aperture at a metal wiring layer of a semiconductor substrate to input and output an electric signal; and an open stub located at a contact surface of a waveguide flange on a ground surface of a semiconductor chip in order to form a ground path of the probe on a surface of the waveguide flange.

A microwave antenna assembly and methods of using and/or assembling the same, which may mitigate problems related to tolerance and tolerance stackup. For example, the microwave antenna assembly may include a waveguide that includes a first waveguide component and a second waveguide component; and a mechanical connection configured to couple the first waveguide component and the second waveguide component and configured to force a first gap between the first waveguide component and the second waveguide component. A spanning distance of the first gap may be selected to reduce a size of a second gap due to tolerances within the microwave antenna assembly between the waveguide and radio equipment. The radio equipment may be configured to provide the waveguide with microwave radiofrequency (RF) signals.

A broadband GNSS antenna has a broadband patch radiator with top slot excitation and a one-groove slotted vertical choke-ring structure around the patch radiator. The patch radiator includes a radiator ground plane, a slotted-fed radiation patch, a broadband feeding network, and a set of elements with vertical currents. The vertical choke-ring structure contains a top conducting surface with a set of slots, a bottom conducting surface and an adjacent vertical conducting cylinder.

A microwave antenna assembly and methods of using and/or assembling the same, which may mitigate problems related to tolerance and tolerance stackup. For example, the microwave antenna assembly may include a waveguide that includes a first waveguide component and a second waveguide component; and a mechanical connection configured to couple the first waveguide component and the second waveguide component and configured to force a first gap between the first waveguide component and the second waveguide component. A spanning distance of the first gap may be selected to reduce a size of a second gap due to tolerances within the microwave antenna assembly between the waveguide and radio equipment. The radio equipment may be configured to provide the waveguide with microwave radiofrequency (RF) signals.

A waveguide includes a first waveguide section and a second waveguide section disposed with a predetermined gap therebetween. The first waveguide section has first waveguide holes. The second waveguide section has second waveguide holes that open to face the first waveguide holes, respectively. Each of the second waveguide holes has an opening portion of an elongated hole shape that opens on a facing surface of the second waveguide section that faces the first waveguide section. A direction along a major axis of the opening portion of each of the second waveguide holes is defined as a major axis direction. The major axis direction of the opening portion of one of the second waveguide holes intersects with the major axis direction of the opening portion of another of the second waveguide holes that is adjacent to the one of the second waveguide holes.

A filter circuit includes: a housing formed of a conductor and provided with input and output ports that each includes outer and inner conductors, the housing being kept at a ground potential together with the outer conductors of the input and output ports; a protrusion portion formed of a conductor, connected to the housing, and configured to protrude in a spiral shape inside the housing; and a power feeding line provided inside the housing and configured to be insulated from the housing. The power feeding line includes an input-side conductor which is the inner conductor of the input port, an output-side conductor which is the inner conductor of the output port, and an antenna connected to the input-side conductor and the output-side conductor and formed in a spiral shape coaxially with the protrusion portion. The protrusion portion and the antenna form a choke structure.

An electromagnetic wave input/output element 1 attachable to a waveguide includes a dielectric three dimensional object 10 in the shape of a parallelepiped. The ratio b/c of the length b of the long side of the aperture surface of the parallelepiped and the length c of the side of the parallelepiped in the direction perpendicular to the aperture surface is smaller than 0.75.

A metallic waveguide antenna comprising a waveguide having a waveguide through hole adapted to guide electromagnetic waves; and a dielectric fixture made of a material with a low electrical permittivity attached to a front portion of said waveguide and having a fixture through hole aligned with the waveguide through hole of the attached waveguide.