Abstract: An antenna having a driven element coupled to multiple additional elements to resonate at multiple frequencies. A magnetic dipole mode is generated by coupling a driven element to a second element, and additional resonances are generated by coupling additional elements to either or both of the driven or second element. One or multiple active components can be coupled to one or more of the coupled elements to provide dynamic tuning of the coupled or driven elements.

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: Antenna systems comprising modal antennas for use in diversity and similar schemes include a modal antenna capable of multiple antenna modes wherein a distinct radiation pattern exists for each antenna mode, and a control signal for directing variation of the antenna modes. Methods for designing modal diversity antennas are further disclosed.

Abstract: An antenna system is capable of optimizing communication link quality with one or multiple transceivers while suppressing one or multiple interference sources. The antenna provides a low cost, physically small multi-element antenna system capable of being integrated into mobile devices and designed to form nulls in the radiation pattern to reduce interference from unwanted interferers. The antenna system operates in both line of sight and high multi-path environments by adjusting the radiation pattern and sampling the received signal strength to reduce signal levels from interferers while monitoring and optimizing receive signal strength from desired sources.

Abstract: The instant disclosure concerns an antenna system and method for location-finding of a wireless communication device. A cellular multimode antenna is configured to analyze pilot signals from base station towers across a plurality of antenna modes. Information corresponding to the received signals and each antenna mode is analyzed to determine a location fix. In certain optional embodiments, the location fix determined by the cellular multimode antenna is used to determine an optimal mode for a second GPS modal antenna, such that the selected mode of the GPS modal antenna provides optimum signal quality with the global positioning system. In this regard, the cellular multimode antenna estimates the location of the device, and a mode for the GPS modal antenna is selected based on the location fix such that the GPS antenna is capable of quickly determining a precise position of the device.

Abstract: A system and method for diversity implementation are provided, where diversity gains are obtained by using a hybrid of the switching technique and the combining technique in conjunction with the use of a modal antenna. The antenna system includes multiple antennas including at least one modal antenna that has multiple modes, and a processor for selecting one or more modes from the multiple modes associated with each of the at least one modal antenna, combining modes to form one or more combinations of modes, the modes in each of the one or more combinations including one of the one or more selected modes associated with each of the at least one modal antenna, and selecting one of the one or more combinations that optimizes correlation and/or a quality metric for diversity.

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: An antenna system is capable of optimizing communication link quality with one or multiple transceivers while suppressing one or multiple interference sources. The antenna provides a low cost, physically small multi-element antenna system capable of being integrated into mobile devices and designed to form nulls in the radiation pattern to reduce interference from unwanted interferers. The antenna system operates in both line of sight and high multi-path environments by adjusting the radiation pattern and sampling the received signal strength to reduce signal levels from interferers while monitoring and optimizing receive signal strength from desired sources.

Abstract: A multi-band antenna system for MIMO applications is adapted to provide high isolation between antennas across a wide range of frequencies. Multiple Isolated Magnetic Dipole (IMD) antennas are co-located and connected with a feed network that can include switches that adjust phase length for transmission lines connecting the antennas. Filtering is integrated into the feed network to improve rejection of unwanted frequencies. Filtering can also be implemented on the antenna structure. Either one or multi-port antennas can be used.

Abstract: A multi-frequency, noise optimized active antenna capable of transmit and receive operation consisting of one or several actively tuned antennas optimized over incremental bandwidths and capable of tuning over a large total bandwidth. One or several switches are integrated and provide the capability of operation of an active antenna for both transmit and receive functions. One or multiple impedance transformers are connected to the antennas at an optimal location, with the transformers acting to reduce the impedance for optimal coupling to a transceiver/receiver. Active components can be incorporated into the antenna structures to provide yet additional extension of the bandwidth along with increased optimization of antenna performance over the frequency range of the antenna. The radiating elements can be co-located with a ferrite material and/or active components coupled to the element to tune across a wide frequency range.

Abstract: In a typical system a combination of filters (BAW, SAW, etc) and an antenna are configured to achieve frequency filtering effect and efficient transmission and reception of communication signals. Wireless communication systems require specific bandwidth and out-of-band rejection; typically this metric is characterized in frequency roll-off in units of dB/MHz. This number is distributed between the antenna and filter, with the antenna contributing little to date to the filtering effect. Loss and cost penalties are incurred when multi-mode systems are designed which require additional rejection from the filter elements. Described here is a method of designing antennas to reduce the amount of rejection and complexity from the filter system. A superposition of a symmetrical frequency response from the antenna structure coupled with a non-symmetrical frequency response from a counterpoise structure generates increased rejection of out-of-band components.

Abstract: A dynamically tuned repeater system for improved communication system performance is disclosed. The repeater circuit consists of power amplifiers, low noise amplifiers, filters, switches and antennas along with tuning circuits integrated and controlled to provide an optimized system for RF transmission improvement. Dynamic tuning provides the ability to maintain optimized system performance as required by communication link characteristics. Inputs from proximity sensors are used to further optimize system performance. The repeater topology is capable of transmission and reception enhancement at a multitude of frequency bands.

Abstract: A modal antenna is implemented to provide a variable radiation pattern for improved global positioning system (GPS) signal reception. A multitude of antenna radiation patterns generated from a modal antenna provide the capability to optimally acquire GPS signals across a wide range of angles of arrival. Minimum radiation pattern roll-off is observed from the composite pattern generated from the multiple patterns. An algorithm is described that reduces the acquisition time for a location fix for cold and hot start conditions.

Abstract: A modal adaptive antenna system that dynamically samples proximity sensors or other sensors to determine the use case for the wireless device and then adjust the antenna radiating mode to optimize communication link performance. The modal adaptive antenna system is capable of modifying the antenna radiation pattern to improve communication link quality along with near-field parameters such as SAR and HAC. An algorithm and look-up table containing pre-measured electrical parameters to include TRP, TIS, and SAR are developed and integrated with hardware which includes an antenna and active components to dynamically modify the radiation pattern of the antenna as well as proximity sensors and or other sensing devices.

Abstract: A means of power management and control via a reverse link of a CDMA or LTE network is disclosed. The protocol is set to superimpose itself in an agnostic way to the power management as one more layer of freedom is added. The adjustment depending on the power control is then derived by mismatch if too much power or antenna tuning to enhance the power. This is also following a table in the device that will adjust ECC in case of a MIMO transmission such as LTE as well as SAR. This will generate also a mean of a soft-handoff and load control on the base station.

Abstract: An antenna system is proposed that consists of a radiator integrated into the display of a mobile device. The antenna can be configured to service multiple frequency bands to include NFC (Near Field Communication), FM, TV, GPS, and/or Bluetooth/WiFi. When optimized for the NFC function, the display of the mobile device can be pointed in the direction of or positioned in close proximity to the NFC reader to facilitate the transaction, providing a more natural set of motions for the user. The antenna can contain multiple feed or connect points, and can contain active components to switch to or optimize for the various frequency bands.

Abstract: An antenna system is capable of optimizing communication link quality with one or multiple transceivers while suppressing one or multiple interference sources. The antenna provides a low cost, physically small multi-element antenna system capable of being integrated into mobile devices and designed to form nulls in the radiation pattern to reduce interference from unwanted interferers. The antenna system operates in both line of sight and high multi-path environments by adjusting the radiation pattern and sampling the received signal strength to reduce signal levels from interferers while monitoring and optimizing receive signal strength from desired sources.

Abstract: A multi-band antenna system for MIMO applications is adapted to provide high isolation between antennas across a wide range of frequencies. Multiple Isolated Magnetic Dipole (IMD) antennas are co-located and connected with a feed network that can include switches that adjust phase length for transmission lines connecting the antennas. Filtering is integrated into the feed network to improve rejection of unwanted frequencies. Filtering can also be implemented on the antenna structure. Either one or multi-port antennas can be used.

Abstract: An antenna system, which is coupled to one or more first transceivers for processing signals according to one or more protocols, respectively, and to a second transceiver for performing a function in conjunction with at least one of the one or more protocols, is provided. The antenna system includes a first antenna, a second antenna, a circuit coupled to the first and second antennas, and a controller configured to control the circuit for enabling beam forming and beam steering or for enabling the function in conjunction with the at least one of the one or more protocols. The circuit includes a phase shifting block configured to provide multiple phase shifts between a first radiation pattern associated with the first antenna and a second radiation pattern associated with the second antenna to generate multiple combined radiation patterns corresponding to the phase shifts, respectively, for the beam forming and beam steering purposes.

Abstract: A multi-frequency antenna comprising an IMD element, one or more active tuning elements and one or more parasitic elements. The IMD element is used in combination with the active tuning and parasitic elements for enabling a variable frequency at which the antenna operates, wherein, when excited, the parasitic elements may couple with the IMD element to change an operating characteristic of the IMD element.