Abstract:
Apparatus include two or more radiating elements connected to a feed network of an antenna, and one or more dummy elements positioned between the two or more radiating elements. The dummy elements are not connected to the feed network of the antenna. Such an arrangement may result in reduced mutual coupling of the two or more radiating elements, and increased antenna performance.
Abstract:
Provided is a transmitting/receiving antenna, including: an array antenna including a plurality of element antennas; and a feeding part transmitting a transmitting signal to the plurality of element antennas and receiving a signal received through the array antenna, in which the plurality of element antennas each include a radiation patch and a transmitting port and a receiving port positioned between the feeding part and the radiation patch.
Abstract:
Disclosed are exemplary embodiments of multiband multiple input multiple output (MIMO) vehicular antenna assemblies for installation to a vehicle body wall. In exemplary embodiments, a multiband MIMO vehicular antenna assembly generally includes at least one cellular antenna configured to be operable over one or more cellular frequencies (e.g., Long Term Evolution (LTE), etc.), at least one satellite antenna configured to be operable over one or more satellite frequencies (e.g., Global Navigation Satellite System (GNSS), satellite digital audio radio services (SDARS), etc.) and at least one Dedicated Short Range Communication (DSRC) antenna configured to be operable over DSRC frequencies.
Abstract:
The present invention relates to the technology of active phased arrays (APA) and can find a wide application to build radar stations for mobile or stationary objects as well as communications and hydroacoustic systems.The technical result obtained with the use of the present invention consists in the increase of energy potential and of efficiency as well as in the cost reduction of a radar system or of a communications system while keeping all-around looking, in the increase of the scanning area in the vertical plane, in the provision of the capability to form fully independent beams in opposite directions and in the absence of shaded sectors.Said technical result is obtained thanks to the fact that in a receiver-transmitter containing active two-face phased arrays comprising transmit-receive modules each one of them including two radiating elements, a transmitter, two receivers, two isolator switches, mixers and a phase shifter, the two-face phased arrays are made unidimensional or two-dimensional, they are arranged in the horizontal plane at an angle of 75-105° to each other while keeping the capability of all-around looking, the transmit-receive module is provided with an additional phase shifter, each one of both phase shifters being permanently connected, via a selector switch, to one of the receivers or to the transmitter, and the transmitter is connected, via a switch and circulators, to the radiating elements with the possibility to be alternately connected to the radiating elements with the use of different frequencies and/or with the use of a different signal coding, corresponding to different frequencies and coding of the receivers receiving mode with the possibility to form at least two independent beams in opposite directions, the active two-side phased arrays being shifted in relation to each other in the horizontal and/or vertical plane.
Abstract:
Disclosed is an apparatus for decoupling two antennas in an antenna array, in which the two antennas transmit and receive signals via a first input/output port and a second input/output port of the apparatus. The device may comprise a first adjusting device connected between a first antenna of the two antennas and the first input/output port, a second adjusting device connected between a second antenna of the two antennas and the second input/output port, and one or more decoupling networks connected between the first input/output port and the second input/output port. The first adjusting device and the second adjusting device are configured to have admittance adjustable to compensate an admittance of the decoupling networks such that an isolation coefficient between the two input/output ports approaches zero as well as reflection coefficients of each input/output port are minimized.
Abstract:
An antenna array containing two or more radiating elements, with nearest neighbor radiating elements connected together with a non-Foster circuit at terminals of the radiating elements such that mutual reactance of the elements is reduced over a wider bandwidth than which would be obtained if the non-Foster circuits were omitted.
Abstract:
A wireless local area network (“WLAN”) antenna array (“WLANAA”) is disclosed. The WLANAA may include a circular housing having a plurality of radial sectors and a plurality of primary antenna elements. Each individual primary antenna element of the plurality of primary antenna elements may be positioned within an individual radial sector of the plurality of radial sectors.
Abstract:
A method and system optimally selecting antenna elements based on the current availability of antenna elements and the current usage of other antenna elements within a two or three dimensional array. The present system and method pertain to an approach to allow the maximal usage of each antenna element while simultaneously reducing the coupling between antenna elements to improve the signal strength in each antenna element by ensuring that antenna elements in the same incident path are not tuned to the same frequency or physically or electrically near elements tuned to identical or adjacent frequencies.
Abstract:
A communication device including a first antenna, a second antenna, a ground element, and an isolation element is provided. The ground element is coupled to a conductive plane. The isolation element is disposed between the first antenna and the second antenna and includes a first portion and a second portion. A first end of the first portion and a first end of the second portion are respectively coupled to the ground element, and a second end of the first portion is spaced apart a coupling distance from a second end of the second portion.
Abstract:
RF circuitry, which includes a first main RF switching circuit and a second main RF switching circuit, is disclosed. The first main RF switching circuit is capable of providing an RF signal path between a first main RF port and a first selected one of a first RF antenna and a second RF antenna. The second main RF switching circuit is capable of providing an RF signal path between a second main RF port and a second selected one of the first RF antenna and the second RF antenna. The first main RF switching circuit includes a first pair of RF switches coupled in series between the first RF antenna and the first main RF port; a second pair of RF switches coupled in series between the second RF antenna and the first main RF port; a first shunt RF switch; and a second shunt RF switch.