A radar system to detect and track objects in three dimensions. The radar system including antennae, transmit, receive and processing electronics is all in a small, lightweight, low-cost, highly integrated package. The radar system uses a wide azimuth, narrow elevation radar pattern to detect objects and a Wi-Fi radio to communicate to one or more receiving and display units. One application may include mounting the radar system in an existing radome on an aircraft to detect and avoid objects during ground operations. Objects may include other moving aircraft, ground vehicles, buildings or other structures that may be in the area. The system may transmit information to both pilot and ground crew.

A dielectric substrate for transmitting a signal with a frequency F.sub.0 includes a dielectric and a copper film pattern arranged on a first surface of the dielectric. The copper film pattern has a first dimension L in a direction parallel to a propagation direction of an electromagnetic wave that has the frequency F.sub.0 and that propagates on the first surface, and the first dimension L is given by:

[00001]$L=\frac{1}{\sqrt{{\mathrm{.Math.}}_r}-1}.Math.k.Math..Math.{\lambda }_0$

where ε.sub.r represents a relative permittivity of the dielectric, k represents a constant in a range of 0.15 to 0.70, and λ.sub.0 represents a free space wavelength of the signal.

An integrated slot waveguide antenna array for a radar system. The antenna array may include substrate integrated waveguide (SIW) elements, transmit, receive and processing electronics in a lightweight, low-cost, highly integrated package. The combination of antenna layout, specific dimensions of SIW features, including vias, terminal edges and slot placement may allow an efficient transmit and receive radar pattern as well as consistent, reliable and low cost manufacturing.

Embodiments of the present invention provide a reflector antenna and a reflector antenna feed. The reflector antenna feed includes a transmit antenna array and a receive antenna array, where the transmit antenna array includes at least two transmit antenna units. The receive antenna array includes at least two receive antenna units. Also, a phase center of the transmit antenna array coincides with that of the receive antenna array, where at least one coupling unit is disposed between at least one group of a transmit antenna unit and a receive antenna unit that are adjacent to each other.

A radar system to detect and track objects in three dimensions. The radar system including antennae, transmit, receive and processing electronics is all in a small, lightweight, low-cost, highly integrated package. The radar system uses a wide azimuth, narrow elevation radar pattern to detect objects and a Wi-Fi radio to communicate to one or more receiving and display units. One application may include mounting the radar system in an existing radome on an aircraft to detect and avoid objects during ground operations. Objects may include other moving aircraft, ground vehicles, buildings or other structures that may be in the area. The system may transmit information to both pilot and ground crew.

A wireless communications system includes a first transceiver with a first phased array antenna panel having horizontal-polarization receive antennas and vertical-polarization transmit antennas, where the horizontal-polarization receive antennas form a first receive beam based on receive phase and receive amplitude information provided by a first master chip, the vertical-polarization transmit antennas form a first transmit beam based on transmit phase and transmit amplitude information provided by the first master chip. The wireless communications system may include a second transceiver having vertical-polarization receive antennas and horizontal-polarization transmit antennas in a second phased array antenna panel, where the vertical-polarization receive antennas form a second receive beam based on receive phase and receive amplitude information provided by a second master chip, the horizontal-polarization transmit antennas form a second transmit beam based on transmit phase and transmit amplitude information provided by the second master chip.

A movable device and a block-type millimeter wave array antenna module thereof are provided. The block-type millimeter wave array antenna module includes an antenna carrying substrate, an antenna signal transmitting group, an antenna signal receiving group, and a dummy antenna group. The antenna carrying substrate includes a plurality of block-shaped carrier bodies that are divided into a plurality of first, second, third, and fourth antenna carrier blocks. The antenna signal transmitting group includes a plurality of signal transmitting antenna structures respectively carried by the first antenna carrier blocks. The antenna signal receiving group includes a plurality of signal receiving antenna structures respectively carried by the second antenna carrier blocks. The dummy antenna group includes a plurality of first dummy antenna structures respectively carried by the third antenna carrier blocks, and a plurality of second dummy antenna structures respectively carried by the fourth antenna carrier blocks.

Base station antennas are provided. A base station antenna includes a plurality of arrays of radiating elements. The antenna includes a downlink radio frequency (RF) feed network that is configured to filter downlink portions of different frequency bands and that couples the filtered downlink portions of the different frequency bands to the arrays. Moreover, the antenna includes an uplink RF feed network that couples uplink portions of the different frequency bands to the arrays and that is separate from the downlink RF feed network.

A radar sensor module includes a substrate, at least one transmit antenna formed on a surface of the substrate, and at least one receive antenna formed on the surface of the substrate. A radome is disposed over the surface of the substrate and the at least one transmit antenna and the at least one receive antenna, such that a gap is located between the surface of the substrate and an underside of the radome in which a portion of radiation emitted from the at least one transmit antenna can propagate. At least one trench is formed in the underside of the radome and is electromagnetically coupled to the gap, the at least one trench being sized, shaped and positioned with respect to the gap such that the portion of radiation emitted from the at least one transmit antenna is substantially prevented from propagating toward the receiving antenna.

A wireless radio communication device includes a printed circuit board, a plurality of antennas formed on the printed circuit board, and one or more out-of-plane isolation elements conductively coupled to a ground plane of the printed circuit board. Each antenna extends in a reference plane or in a plane parallel to the reference plane. Each out-of-plane isolation element extends in a direction transverse to the reference plane. Each antenna of the plurality of antennas is configured to resonate in a selected radio frequency (RF) band. The one or more out-of-plane isolation elements are configured to conduct a current in response to excitation of one or more associated antennas that contributes to at least partially cancelling an RF transmission coupling between the one or more antennas and one or more other antennas of the plurality of antennas.