A device for monitoring a health parameter in a person is disclosed. The device includes a semiconductor substrate, at least one transmit antenna configured to transmit millimeter range radio waves over a 3D space below the skin surface of a person, multiple receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, wherein the semiconductor substrate includes circuits for processing signals received on the multiple receive antennas, wherein processing signals includes mixing signals of two different frequencies, and wherein the semiconductor substrate includes at least one output configured to output a signal that corresponds to a health parameter of a person in response to received radio waves.

A device for monitoring a health parameter in a person is disclosed. The device includes a semiconductor substrate, at least one transmit antenna configured to transmit millimeter range radio waves over a 3D space below the skin surface of a person, multiple receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, wherein the semiconductor substrate includes circuits for processing signals received on the multiple receive antennas, wherein processing signals includes mixing signals of two different frequencies, and wherein the semiconductor substrate includes at least one output configured to output a signal that corresponds to a health parameter of a person in response to received radio waves.

A phased array antenna system comprising a plurality of isotropic radiating elements and/or omnidirectional receiving elements addressing close in fields and a plurality of non-isotropic radiating elements and/or non-omnidirectional receiving elements addressing remote fields with the combined elements used to extend the maximum range of the antenna system without increasing the number of element nor the output power of the antenna. The non-isotropic radiating elements and/or the non-omnidirectional receiving elements can be formed by adding focusing structures such as lenses or reflective structures in the radiating path of isotropic radiating elements and/or omnidirectional receiving elements. Antennas with combined isotropic radiating and non-isotropic radiating elements can be utilized for electromagnetic phased array radar, communication and imaging systems and for acoustic phased array sonar or ultrasound systems.

This document describes techniques and systems of an exposed portion of a PCB configured to provide isolation among radar antennas. The described radar system includes an exposed portion of a surface of a printed circuit board (PCB) positioned between a first antenna and a second antenna. The PCB includes a metal plating on the surface of the PCB. A width of the exposed portion can delay a phase of electromagnetic (EM) energy conducted by the metal plating relative to a phase of EM energy that does not traverse the exposed portion. A height of the exposed portion can cause an amount of the EM energy conducted by the metal plating to be approximately equal to an amount of EM energy that traverses the exposed portion. In this way, the described systems and techniques can reduce signal-coupling among radar antennas without additional hardware costs and distance between the antennas.

A radar device includes a transmission module and a reception module disposed separately from the transmission module. The transmission module includes: a transmission circuit unit mounted on the first surface of a circuit board; an antenna substrate provided on the second surface side of the circuit board; and a transmission antenna mounted on the second surface of the antenna substrate and not provided in a range on the back surface side of the antenna substrate corresponding to the range in which the circuit board is disposed. The reception module includes: a reception circuit unit mounted on the third surface of a circuit board; an antenna substrate provided on the fourth surface side of the circuit board; and a reception antenna mounted on the fourth surface of the antenna substrate and not provided in a range on the back surface side of the antenna substrate corresponding to the range in which the circuit board is disposed.

A radar device includes a transmission module and a reception module disposed separately from the transmission module. The transmission module includes: a transmission circuit unit mounted on the first surface of a circuit board; an antenna substrate provided on the second surface side of the circuit board; and a transmission antenna mounted on the second surface of the antenna substrate and not provided in a range on the back surface side of the antenna substrate corresponding to the range in which the circuit board is disposed. The reception module includes: a reception circuit unit mounted on the third surface of a circuit board; an antenna substrate provided on the fourth surface side of the circuit board; and a reception antenna mounted on the fourth surface of the antenna substrate and not provided in a range on the back surface side of the antenna substrate corresponding to the range in which the circuit board is disposed.

A radar module for level and/or limit level monitoring in plant automation, comprising a radar signal source that generates and transmit a radar signal, the radar signal source having a surface facing a filling material, a radar signal conductor that receives, conducts and emits the radar signal, the radar signal conductor being mounted on the surface of the radar signal source, and a potting compound that at least partially covers the surface of the radar signal source and at least partially covers the radar signal conductor.

A radar module for level and/or limit level monitoring in plant automation, comprising a radar signal source that generates and transmit a radar signal, the radar signal source having a surface facing a filling material, a radar signal conductor that receives, conducts and emits the radar signal, the radar signal conductor being mounted on the surface of the radar signal source, and a potting compound that at least partially covers the surface of the radar signal source and at least partially covers the radar signal conductor.

A multi-mode microwave waveguide blade sensing system includes a transceiver, a waveguide, and a probe sensor. The transceiver generates a microwave energy signal having a first waveguide mode and a different second waveguide mode. The waveguide includes a first end that receives the microwave energy signal. The probe sensor includes a proximate end that receives the microwave energy signal from the transceiver and a distal end including an aperture that outputs the microwave energy signal. The probe sensor directs the microwave energy signal at a first direction based on the first waveguide mode and a different second direction different based on the second waveguide mode. The probe sensor receives different levels of reflected microwave energy based at least in part on a location at which the at least one microwave energy signal is reflected from the machine.

Examples disclosed herein relate to a multi-layer, multi-steering (MLMS) antenna array for autonomous vehicles. The MLMS antenna array includes a superelement antenna array layer comprising superelement subarrays, in which each superelement subarray includes radiating slots for radiating a transmission signal. The MLMS antenna array also includes a power divider layer coupled to the superelement antenna array layer and configured to serve as a feed to the superelement antenna array layer, in which the power divider layer is coupled to phase shifters that apply different phase shifts to transmission signals propagating to the superelement antenna array layer. The MLMS antenna array also includes a transition layer configured to couple the power divider layer and the superelement antenna array layer to the phase shifters through transition structures such as through-hole vias. Other examples disclosed herein include a radar system for use in an autonomous driving vehicle.