A chip-implementation of a millimeter wave MIMO radar comprises transmitters for transmitting short bursts of digitally modulated radar carrier signals and receivers for receiving delayed echoes of those signals. Various signal formats defined by the number of bits per transmit burst, the transmit burst duration, the receive period duration, the bitrate, the number of range bins, and the number of bursts per scan, facilitate the choice of modulating bit patterns such that when correlating for target echoes over an entire scan, the correlation codes for different ranges and different transmitters are mutually orthogonal or nearly so as compared to a random selection of codes. In the event of imperfect orthogonality, the subtraction of strong already-detected target signals allows for better detecting of weaker signals or moving targets that are rendered non-orthogonal by their Doppler shift.

Various arrangements of transmit and receive shared-aperture array antenna systems are presented herein. The arrangements can include an antenna that includes: a planar substrate; a first row of a first plurality of transmit patches arranged on the planar substrate; a second row of a plurality of receive patches arranged on the planar substrate; and a third row of a second plurality of transmit patches arranged on the planar substrate. The first row, second row, and third row can be parallel and the second row can be between the first row and the third row.

Various arrangements of transmit and receive shared-aperture array antenna systems are presented herein. The arrangements can include an antenna that includes: a planar substrate; a first row of a first plurality of transmit patches arranged on the planar substrate; a second row of a plurality of receive patches arranged on the planar substrate; and a third row of a second plurality of transmit patches arranged on the planar substrate. The first row, second row, and third row can be parallel and the second row can be between the first row and the third row.

A base station antenna includes an internal radome and a multi-column antenna array antenna. The internal radome can be configured with a plurality of columns, each having an outwardly projecting peak segment and each neighboring column of the internal radome can be separated by a valley. Each outwardly projecting peak segment(s) is oriented to project toward a front of the base station antenna and is positioned medially aligned over a respective column of the multi-column antenna array to thereby reduce mutual coupling of respective elements and/or columns of elements and/or provide a common near field environment for each element and/or each column.

A base station antenna includes an internal radome and a multi-column antenna array antenna. The internal radome can be configured with a plurality of columns, each having an outwardly projecting peak segment and each neighboring column of the internal radome can be separated by a valley. Each outwardly projecting peak segment(s) is oriented to project toward a front of the base station antenna and is positioned medially aligned over a respective column of the multi-column antenna array to thereby reduce mutual coupling of respective elements and/or columns of elements and/or provide a common near field environment for each element and/or each column.

According to various aspects, exemplary embodiments are provided of antenna assemblies. In an exemplary embodiment, an antenna assembly generally includes at least one antenna element configured to be operable for receiving high definition television signals.

A system 10 for providing communication services to user stations 14.1 to 14.n which are spaced on each of a first side 16 and a second side 18 of a corridor 12. The system comprises at least one corridor node 20. The corridor node comprises a radio transceiver arrangement 54 and a spaced reflector 70. The transceiver arrangement is connected to an antenna arrangement 58, which comprises a reflective feed antenna 67. The antenna arrangement has a radiation pattern comprising an elongate lobe 30, having a main axis 38, which illuminates user stations associated with the corridor node on one of the first side and the second side. The spaced reflector reflects signals 88 impinging from the reflective feed antenna in accordance with a reflected radiation pattern, comprising one reflected lobe 34, having a main axis 42, for illuminating user stations associated with the corridor node on the other of the first side and the second side.

Techniques are provided for improving the performance of a multi-band antenna in a wireless device. An example wireless device includes at least one radio frequency integrated circuit, and at least one patch antenna operably coupled to the at least one radio frequency integrated circuit, including a first patch operably coupled to the at least one radio frequency integrated circuit, a ground plane disposed below the first patch, and a plurality of via wall structures disposed around the first patch, wherein each of the plurality of via wall structures is electrically coupled to the ground plane.

Techniques are provided for improving the performance of a multi-band antenna in a wireless device. An example wireless device includes at least one radio frequency integrated circuit, and at least one patch antenna operably coupled to the at least one radio frequency integrated circuit, including a first patch operably coupled to the at least one radio frequency integrated circuit, a ground plane disposed below the first patch, and a plurality of via wall structures disposed around the first patch, wherein each of the plurality of via wall structures is electrically coupled to the ground plane.

A quasi-optical coupling system launches and extracts surface wave communication transmissions from a wire. At millimeter-wave frequencies, where the wavelength is small compared to the macroscopic size of the equipment, the millimeter-wave transmissions can be transported from one place to another and diverted via lenses and reflectors, much like visible light. Transmitters and receivers can be positioned near telephone and power lines and reflectors placed on or near the cables can reflect transmissions onto or off of the cables. The lenses on the transmitters are focused, and the reflectors positioned such that the reflected transmissions are guided waves on the surface of the cables. The reflectors can be polarization sensitive, where one or more of a set of guided wave modes can be reflected off the wire based on the polarization of the guided wave modes and polarization and orientation of the reflector.