Abstract: Methods and systems for multi-protocol transmissions in shared spectrum are disclosed where an OFDM transmitter is configured to generate transmissions associated with one OFDM technology or protocol using subcarriers of another OFDM technology. Generally, an OFDM transmitter may be configured to map or assign the different OFDM signals to different subsets of the available OFDM subcarriers such that the data contained therein can be transmitted at the same or during an overlapping time interval. In one application, an LTE transmitter is configured to generate and/or transmit LTE information using LTE subcarriers located in unused portion(s) of the Wi-Fi system bandwidth independently of or in addition to transmitting Wi-Fi or LTE information using LTE subcarriers located in portions of the Wi-Fi system bandwidth normally occupied by Wi-Fi subcarriers.

Abstract: Embodiments of the present disclosure relate to a showerhead assembly for use in a processing chamber. The showerhead assembly includes a porous insert disposed in a space defined between a gas distribution plate and a base plate to moderate the corrosive radicals resulting from plasma ignition to reduce particle issues and metal contamination in the chamber. The porous insert is a conductive material, such as metal, used to reduce the gap electrical field strength, or may be a dielectric material such as ceramic, polytetrafluoroethylene, polyamide-imide, or other materials with a low dielectric loss and high electrical field strength under conditions of high frequency and strong electric fields. As such, the electrical breakdown threshold is enhanced. The porous insert may reduce and/or eliminate showerhead backside plasma ignition and may include multiple concentric narrow rings that cover gas holes of the gas distribution plate.

Abstract: Methods and systems for multi-protocol transmissions in shared spectrum are disclosed where an OFDM transmitter is configured to generate transmissions associated with one OFDM technology or protocol using subcarriers of another OFDM technology. Generally, multi-protocol transmissions as described herein may be performed sequentially (e.g. in a time division multiplexing fashion) or concurrently (e.g. during the same or an overlapping time interval). For concurrent transmissions, an OFDM transmitter may be configured to map or assign the different OFDM signals to different subsets of the available OFDM subcarriers such that the data contained therein can be transmitted at the same or during an overlapping time interval. In one application, an LTE transmitter is configured to use different subsets of the LTE subcarriers for concurrent LTE and 802.11 transmissions that can respectively be decoded by LTE and 802.11 receivers.

Abstract: Protocols and algorithms for contention-based adaptive modulation networks, typically used in unlicensed bands. A wireless system in which high modulation rate packets are prioritized over low rate packets. The wireless system is configured to process communication signals from plural user portable devices having wireless access points capable of dynamically adjusting access point transmit power on a user-by-user basis to a minimum level required to achieve a target signal-to-noise ratio from each user portable device irrespective of the interference observed on the link is also disclosed. The wireless system is also capable of dynamically adjusting access point transmitter power and receiver sensitivity on a user-by-user basis to a minimum level required to achieve the highest possible modulation rate.

Abstract: Methods and systems for multi-protocol transmissions in shared spectrum are disclosed. According to principles described herein, a wireless transmitter is configured to generate subcarriers or symbol information from one OFDM technology using subcarriers of another OFDM technology. With this approach, a wireless transmitter configured to transmit OFDM symbols using subcarriers and a subcarrier frequency spacing associated with one OFDM protocol can also be configured to transmit OFDM symbols associated with another OFDM protocol which normally uses different subcarriers and a different subcarrier frequency spacing. In one application, an LTE transmitter uses LTE subcarriers to generate 802.11 (e.g.

Abstract: A radio-frequency probe system with a transmitting or receiving element integrated into a cable assembly is disclosed. In some embodiments a preferred configuration may contain one or more sensing elements integrated into the transmitting or receiving element. In another embodiment, the radio frequency probe comprises an antenna body fixed to a coaxial cable, in which the center conductor of the coaxial cable serves as the transmitting or receiving element. A method for monitoring, transmitting, or detecting one or more parameters using a single radio frequency probe is also disclosed.

Abstract: The present disclosure is directed to an artificial skin having a radar absorbing layer and a conductive layer containing an electrically conductive material, wherein the artificial skin has a reflection coefficient substantially equal to a human skin reflection coefficient, the human skin reflection coefficient being determined at an electromagnetic radiation frequency ranging from 1-500 GHz. A human phantom composed of the artificial skin and methods of testing the contrast resolution sufficiency of and active millimeter wave imaging system using the human phantom are also disclosed.

Abstract: A method and system for time-sharing radiofrequency spectrum resources between at least two wireless networks where the transmission time duration of a network node configured to control transmissions in a first wireless network is adjusted based on the estimated number of active wireless devices operating in a second wireless network. The shared channel is accessed following a contention based, CSMA/CD, protocol, In one aspect, a method is provided for the network node which includes after a first wireless network transmission in the first wireless network, determining a start time of a contention-based transmission in the second wireless network, estimating a number of active wireless devices operating in the second wireless network based on the start time, and adjusting a transmission time duration for a subsequent first wireless network transmission based on the number of active wireless devices estimated.

Abstract: The present disclosure is directed to an artificial skin including: a radar absorbing layer; a conductive layer comprising at least one material selected from the group consisting of a semiconductive oxide deposited onto a substrate and an electrically conductive polymer, wherein the substrate is in contact with the radar absorbing layer, and wherein the artificial skin has a reflection coefficient substantially equal to a human skin reflection coefficient, the human skin reflection coefficient being determined at an electromagnetic radiation frequency ranging from 1-500 GHz. A human phantom composed of the artificial skin and methods of using the human phantom are also disclosed.

Abstract: The present disclosure is directed to an artificial skin including: a radar absorbing layer; a conductive layer comprising at least one material selected from the group consisting of a semiconductive oxide deposited onto a substrate and an electrically conductive polymer, wherein the substrate is in contact with the radar absorbing layer, and wherein the artificial skin has a reflection coefficient substantially equal to a human skin reflection coefficient, the human skin reflection coefficient being determined at an electromagnetic radiation frequency ranging from 1-500 GHz. A human phantom composed of the artificial skin and methods of using the human phantom are also disclosed.

Abstract: A radio-frequency probe system with a transmitting or receiving element integrated into a cable assembly is disclosed. In some embodiments a preferred configuration may contain one or more sensing elements integrated into the transmitting or receiving element. In another embodiment, the radio frequency probe comprises an antenna body fixed to a coaxial cable, in which the center conductor of the coaxial cable serves as the transmitting or receiving element. A method for monitoring, transmitting, or detecting one or more parameters using a single radio frequency probe is also disclosed.

Abstract: The present disclosure is directed to a measurement system for measuring a reflection coefficient of a test sample, including: a transceiver antenna configured to be coupled to a source of electromagnetic radiation; and a RAM positioned between the transceiver antenna and a measurement region of the transceiver antenna, wherein the RAM comprises an aperture substantially orthogonal to and substantially aligned with a transceiving axis of the transceiver antenna. A method for obtaining error correction of a measurement system and a method of measuring a reflection coefficient in a test sample are also provided.

Abstract: A method and system for providing a switchable waveguide are provided. According to some aspects, a switched waveguide has a waveguide structure having a reflector located within the waveguide structure. The switched waveguide also includes a radio frequency (RF) switch configured to connect and disconnect the reflector to the waveguide structure.

Abstract: A method and system for time-sharing radiofrequency spectrum resources between at least two wireless networks where the transmission time duration of a network node configured to control transmissions in a first wireless network is adjusted based on the estimated number of active wireless devices operating in a second wireless network. The shared channel is accessed following a contention based, CSMA/CD, protocol, In one aspect, a method is provided for the network node which includes after a first wireless network transmission in the first wireless network, determining a start time of a contention-based transmission in the second wireless network, estimating a number of active wireless devices operating in the second wireless network based on the start time, and adjusting a transmission time duration for a subsequent first wireless network transmission based on the number of active wireless devices estimated.

Abstract: Methods and systems for multi-protocol transmissions in shared spectrum are disclosed. According to principles described herein, a wireless transmitter is configured to generate subcarriers or symbol information from one OFDM technology using subcarriers of another OFDM technology. With this approach, a wireless transmitter configured to transmit OFDM symbols using subcarriers and a subcarrier frequency spacing associated with one OFDM protocol can also be configured to transmit OFDM symbols associated with another OFDM protocol which normally uses different subcarriers and a different subcarrier frequency spacing. In one application, an LTE transmitter uses LTE subcarriers to generate 802.11 (e.g.

Abstract: A slot antenna comprising a conductor, a principal slot, a feed point and one or more side slots is provided. The conductor has an axis defining a first conductor side and a second conductor side. The principal slot extends longitudinally within the conductor along the axis. The feed point comprises a first coupling point and a second coupling point respectively located on the first and second conductor sides. The one or more side slots extend from the principal slot. The slot antenna has a reduced physical length compared to the length of a typical slot antenna at the same frequency of operation. Electronic device comprising a ground plane and one or more slot antenna is provided. The one or more slot antennas are mounted on the ground plane.

Abstract: Systems and methods for radio resource allocation across multiple resource dimensions are disclosed. In some embodiments, a method of operation of a network node in a wireless communications network to allocate one or more radio resources to two or more traffic partitions includes obtaining radio resource allocation policies for the two or more traffic partitions; obtaining radio resource usage for the two or more traffic partitions across multiple resource dimensions; and allocating the radio resources to the two or more traffic partitions based on the radio resource usage of the two or more traffic partitions across the multiple resource dimensions and the radio resource allocation policies for the two or more traffic partitions. In this way, the radio resource allocation policies may be enforced across multiple resource dimensions of the wireless communications network.

Abstract: Implementations described herein provide a cooling base and a substrate support assembly having the same. In one example, a cooling base is provided that includes a body coupled to a cap. A plurality cooling channels are disposed in the body and bounded on at least one side by the cap. The plurality cooling channels have a polar array of spirals.

Abstract: Embodiments of the present disclosure relate to a showerhead assembly for use in a processing chamber. The showerhead assembly includes a porous insert disposed in a space defined between a gas distribution plate and a base plate to moderate the corrosive radicals resulting from plasma ignition to reduce particle issues and metal contamination in the chamber. The porous insert is a conductive material, such as metal, used to reduce the gap electrical field strength, or may be a dielectric material such as ceramic, polytetrafluoroethylene, polyamide-imide, or other materials with a low dielectric loss and high electrical field strength under conditions of high frequency and strong electric fields. As such, the electrical breakdown threshold is enhanced. The porous insert may reduce and/or eliminate showerhead backside plasma ignition and may include multiple concentric narrow rings that cover gas holes of the gas distribution plate.

Abstract: A system and method for improving signal reception in an access point. The system and method may comprise the steps of: transmitting a non-zero 802.11 NULL-data packet to a client, wherein the traffic test is initiated at intervals; receiving an 802.11 ACKnowledgement packet from the client wherein the 802.11 ACKnowledgement packet indicates that the non-zero 802.11 NULL-data packet was received by the client; and discarding the non-zero 802.11 NULL-data packet after receipt.