Abstract: A communication system is provided, including one or more antennas coupled to multiple RF paths, one or more matching blocks, each block including multiple matching networks, a look-up table including characterization data according to frequency bands and conditions, and a controller configured to control the multiple matching networks by referring to the look-up table to provide optimum impedance for a frequency band selected and a condition detected during a time interval. The matching block may further include switches and adjustment circuits.

Abstract: A modal antenna array is described where modal antenna elements capable of generating multiple radiation modes are used to form array radiation patterns. Nulls in the array radiation pattern can be formed and positioned by proper modal antenna element mode selection, with these nulls used to provide interference suppression or mitigation. The shift in array radiation pattern maxima generated by modal element mode selection can be used to improve communication system link quality by optimizing array radiation pattern characteristics. Specifically, a ring or circular array configuration is described where a simplified common feed port can be implemented to feed multiple modal antenna elements used to form the array. A switch can be used to connect or disconnect one modal element from the array, with this feature providing additional unique array beam states. The modal array can be commanded via a look-up table or algorithm.

Abstract: A two antenna assembly for use in MIMO systems is described where wide beamwidth performance is achieved over wide frequency ranges while maintaining high isolation and low envelope correlation between the antenna elements in a low profile, small form factor. This MIMO antenna system is optimal for use in DAS systems for in-building applications where a MIMO antenna system is required and a low profile is desirable for ceiling and wall mount applications. The antenna assembly is designed to maintain low Passive Intermodulation (PIM) characteristics across multiple cellular frequency bands. Each antenna in the pair of elements is configured to cover multiple cellular frequency bands to provide a single port per antenna for use with multiple transceivers. A single conductor radiator design for the antenna elements simplifies manufacturing of the antenna. A tuned parasitic element is positioned between the antenna elements to enhance isolation at specific portions of the frequency range.

Abstract: A tunable filter is described where the frequency response as well as bandwidth and transmission loss characteristics can be dynamically altered, providing improved performance for transceiver front-end tuning applications. The rate of roll-off of the frequency response can be adjusted to improve performance when used in duplexer applications. The tunable filter topology is applicable for both transmit and receive circuits. A method is described where the filter characteristics are adjusted to account for and compensate for the frequency response of the antenna used in a communication system.

Abstract: An antenna comprising an IMD element and one or more parasitic and active tuning elements is disclosed. The IMD element, when used in combination with the active tuning and parasitic elements, allows antenna operation at multiple resonant frequencies. In addition, the direction of antenna radiation pattern may be arbitrarily rotated in accordance with the parasitic and active tuning elements. Unique antenna architectures for beam steering in Wi-Fi band applications is further described.

Abstract: A network communication system includes three or more nodes that are wirelessly connected in a mesh configuration, forming a reconfigurable mesh network, to improve communication link performance. The reconfigurable mesh network can be dynamically adjusted to maintain and improve communication links throughout a region serviced by the mesh, or between a source and destination on the mesh network. Adaptive antenna system techniques are implemented in one or more of the nodes on the mesh network, such that multiple radiation pattern modes can be generated to dynamically adjust radiated performance between specific links along a selected path for communicating information on the mesh network. Antenna system metrics, such as signal to noise ratio, signal to interference plus noise ratio, and receive signal strength indicator are used to monitor and to adjust adaptive antenna system characteristics to optimize link performance between nodes on the mesh network.

Abstract: The disclosure concerns a low-profile mounting apparatus for use with installation and aesthetic positioning of distributed antenna systems (DAS) and other similar antenna modules. The mounting apparatus is used to minimize the exposed profile of an installed antenna module.

Abstract: The disclosure concerns a beam steering antenna system that can be integrated into a portion of a mobile device, such as a ring conductor that encompasses the device or traverses a portion of the periphery of the mobile device. The single port antenna is capable of generating multiple radiation modes which possess different radiation pattern characteristics. An offset parasitic is implemented to couple to the main radiating element and alter the current distribution to affect a change in radiation mode. The coupling typically occurs at a coupling region designed into the conductive ring used as the antenna in a wireless device.

Abstract: The disclosure concerns an antenna subsystem that can be used in various repeater systems to optimize gain of the repeater by increasing isolation between donor and server antennas, wherein at least one of the donor and server antennas is an active multi-mode antenna.

Abstract: A two antenna assembly for use in MIMO systems is described where wide beamwidth performance is achieved over wide frequency ranges while maintaining high isolation and low envelope correlation between the antenna elements in a low profile, small form factor. This MIMO antenna system is optimal for use in DAS systems for in-building applications where a MIMO antenna system is required and a low profile is desirable for ceiling and wall mount applications. The antenna assembly is designed to maintain low Passive Intermodulation (PIM) characteristics across multiple cellular frequency bands. Each antenna in the pair of elements is configured to cover multiple cellular frequency bands to provide a single port per antenna for use with multiple transceivers. A single conductor radiator design for the antenna elements simplifies manufacturing of the antenna. A tuned parasitic element is positioned between the antenna elements to enhance isolation at specific portions of the frequency range.

Abstract: An active device and circuits utilized therewith are disclosed. In an aspect, the active device comprises an n-type transistor having a drain, gate and bulk and a p-type transistor having a drain, gate and bulk. The n-type transistor and the p-type transistor include a common source. The device includes a first capacitor coupled between the gate of the n-type transistor and the gate of the p-type transistor, a second capacitor coupled between the drain of the n-type transistor and the drain of p-type transistor and a third capacitor coupled between the bulk of the n-type transistor and the bulk of p-type transistor. The active device has a high breakdown voltage, is memory less and traps even harmonic signals.

Abstract: An embedded antenna system is described for use with metallized enclosures and housings used with wireless communication devices. One or multiple radiators are coupled to a metal cover, with ground points established on the metal cover to improve radiation efficiency and control the frequency response of the antenna system. Dynamic tuning methods are described wherein detuning of the antenna system from sources such as body-loading are compensated by adjusting impedance properties of the combination of radiator and metallized cover.

Abstract: A method for obtaining the direction of a signal incoming to a communication device is provided using a modal antenna that has multiple modes corresponding to multiple radiation patterns with a single feed.

Abstract: An antenna-like matching component is provided, comprising one or more conductive portions formed on a substrate. Shapes and dimensions of the one or more conductive portions are determined to provide impedance matching for one or more antennas coupled to the matching component.

Abstract: A system is described for distributing over the air (OTA) channels within buildings and homes. The system can implement one or more active multi-mode antennas for improved performance and reliability. The system can be configured as a mesh network where multiple nodes are distributed to improve the probability of channel capture across the VHF and UHF frequencies used for over the air TV distribution. A node consists of a beam steering antenna that operates at the VHF and UHF frequencies for TV signal reception, a receiver and demodulation circuit, a transcoder to convert the received information for re-distribution, and a transceiver capable of operation at a secondary frequency band for use in re-distributing the information to communication devices in proximity of the node.

Abstract: An RFIC with memory is described where the memory can be used to house a look-up table for tuning components designed into the RFIC, providing a customized tuning circuit for antenna and transceiver front-end tuning applications. The look-up table can be loaded at wafer level during the manufacturing process to customize an RFIC design for a specific antenna system. The memory can be used to restrict or tailor the tuning range of tunable capacitors and switches within the RFIC to optimize performance in the end application. The resident memory will improve signaling latency when tuning for time critical applications such as channel tuning in a cellular communication system.

Abstract: A device includes a plurality of antennas, including one or more active antennas, the antennas being configured in one of a plurality of possible configurations to achieve operation in WAN, LTE, WiFi, or WiMax bands, or a combination thereof. In some embodiments, a passive antenna is utilized with lumped loading to fix the antenna tuning state. A primary and auxiliary radiator can be included in the device and configured for WAN/LTE bands, while additional antennas can be incorporated for WiFi and WiMax bands. Various antenna configurations incorporate the antenna having multiple coupled regions.

Abstract: An active device and circuits utilized therewith are disclosed. In an aspect, the active device comprises an n-type transistor having a drain, gate and bulk and a p-type transistor having a drain, gate and bulk. The n-type transistor and the p-type transistor include a common source. The device includes a first capacitor coupled between the gate of the n-type transistor and the gate of the p-type transistor, a second capacitor coupled between the drain of the n-type transistor and the drain of p-type transistor and a third capacitor coupled between the bulk of the n-type transistor and the bulk of p-type transistor. The active device has a high breakdown voltage, is memory less and traps even harmonic signals.

Abstract: The disclosure concerns a low-profile mounting apparatus for use with installation and aesthetic positioning of distributed antenna systems (DAS) and other similar antenna modules. The mounting apparatus is used to minimize the exposed profile of an installed antenna module.

Abstract: The disclosure concerns an antenna subsystem that can be used in various repeater systems to optimize gain of the repeater by increasing isolation between donor and server antennas, wherein at least one of the donor and server antennas is an active multi-mode antenna.