A feed network for an antenna system having a waveguide is disclosed. The waveguide has broad sides facing each other and narrow sides facing each other. The feed network includes a first microstrip conductor including a first conductor loop and a second microstrip conductor including a second conductor loop. The first and second conductor loops each extend into the waveguide from one of the narrow sides and are each electrically coupled to one of the broad sides.

An antenna system for satellite applications is provide, the antenna system comprising an antenna array and a feed structure, and the antenna array is a passive antenna array configured to have a first state and a second state, the second state being a first deployed state. The feed structure is configured to provide a linearly polarized incident field for the antenna array in the first deployed state. The antenna array comprises a plurality of array elements, and the plurality of array elements forms a polarization conversion surface configured for converting the linearly polarized incident field to a reflected/transmitted circular polarized field. The antenna array is configured so that the radiation pattern of the reflected/transmitted circular polarized field corresponds to a predetermined radiation pattern and an array element geometry and an array element position of each of the plurality array elements are configured to provide the predetermined radiation pattern.

An embodiment of an antenna includes first and second transmission lines, first antenna elements, and second antenna elements. The first transmission line is configured to guide a first signal such that the first signal has a characteristic of a first value, and the second transmission line is configured to guide a second signal such that the second signal has the same characteristic but of a second value that is different than the first value. The first antenna elements are each disposed adjacent to the first transmission line and are each configured to radiate the first signal in response to a respective first control signal, and the second antenna elements are each disposed adjacent to the second transmission line and are each configured to radiate the second signal in response to a respective second control signal. Such an antenna can have better main-beam and side-lobe characteristics, and a better SIR, than prior antennas.

The device measures glucose concentration in blood without any extraction of blood. The device is a non-invasive method for measuring glucose Radio Frequency and Antenna Circuits and Systems. The device is a wearable device that can non-invasively measure blood glucose levels in an instantaneous manner and continuous manner.

An antenna structure serving as an emitter in a radar device with optimized isolation of signal comprises antenna array as the radiating element. The antenna array includes array units. Each array unit includes radiating units connected by a feeder. Radiation area of each radiating unit gradually decreases from a center of array unit to ends of array unit. A specified distance is defined between centers of adjacent radiating units along an extending direction of the feeder. The feeder transmits a current signal to the array units, the radiating unit emits a radar scanning beam based on the current signal.

Base station antennas include a main module that has a first backplane that includes a first reflector. A vertically-extending array of first radiating elements is mounted to extend forwardly from the first reflector, and at least one first RF port is coupled to the vertically-extending array of first radiating elements. These antennas further include a sub-module that is attached to the first backplane. The sub-module includes a second backplane that has a second reflector that is separate from the first reflector. A vertically-extending array of second radiating elements is mounted to extend forwardly from the second reflector and is transversely spaced-apart from the vertically-extending array of first radiating elements. A plurality of second RF ports are coupled to the vertically-extending array of second radiating elements. The vertically-extending array of first radiating elements and the vertically-extending array of second radiating elements are configured to serve a common sector of a base station.

A waveguide microstrip line converter includes a waveguide, a dielectric substrate, a ground conductor including a slot, and a line conductor. The line conductor includes a first section that is a microstrip line having a first line width, a conversion unit that is a second section positioned immediately above the slot and having a second line width greater than the first line width, and a third section extending from the second section in a first direction and performing impedance matching between the first section and the second section. One of the opposite ends of the third section in the first direction is connected to the second section. The first section extends in a second direction perpendicular to the first direction continuously from the other end of the opposite ends of the third section.

A substrate integrated waveguide fed antenna. The antenna includes an electric dipole, a parasitic patch arrangement operably coupled with the electric dipole, and a feed structure. The feed structure includes a substrate integrated waveguide operably coupled with the electric dipole for exciting the electric dipole. A slotted conductive surface with a slot is arranged between the electric dipole and the feed structure for operably coupling the feed structure with the electric dipole.

Apparatus for radiating and/or receiving microwaves and comprising one radiator group with u building blocks with u being an even number, wherein said radiator group has a sandwich-layout comprising a structured layer with q integrated cavities on one side face, with q being an even number, and a structured metal layer covering at least part of said one side face, said u building blocks are structurally identical, said metal layer is structured so that each of said u building blocks comprises a suspended patch-shaped element, which is cavity-backed by one of said q integrated cavities, the shape and size of said patch-shaped elements is defined by boundary slots of said metal layer, said at least one radiator group has a common, central feed point as interface for a hollow waveguide, and wherein said apparatus comprises a hollow waveguide or a waveguide flange being connected to said central feed point.

Embodiments of the invention provide a system and method for chip to chip communications in electronic circuits. In one embodiment, a networking device includes an input port circuit having a transmitter circuit coupled one or more transmitter antennas, wherein the input port circuit transmits a data packet to a first output port circuit using millimeter wave signals. The networking device includes output port circuits including at least the first output port circuit, each of the output port circuits having a receiver circuit coupled to one or more receiver antennas. The networking device includes a beamforming circuit coupled to the one or more transmitter antennas of the input port circuit, wherein the beamforming circuit causes the one or more transmitter antennas to transmit an antenna beam directed at the one or more receiver antennas of the first output port circuit.