Patent application number | Description | Published |
20090256644 | RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS - One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes an antenna interface coupled to an antenna that exhibits a time-varying impedance. The RF communication device also includes a test interface coupled to RF test equipment that exhibits a test impedance. A tuning circuit in the RF communications device selectively provides a matched impedance to either the time-varying impedance or the test impedance based on feedback derived from the test interface. Other methods and systems are also disclosed. | 10-15-2009 |
20090298448 | STRATEGY FOR USING THE ENVELOPE INFORMATION WITHIN A CLOSED LOOP POWER CONTROL SYSTEM - A power control system includes a reference path filter used to suppress high frequencies in an input signal and generate a filtered envelope signal, a reference path amplifier to scale the filtered input signal based on a gain signal and generate a reference signal, a signal path amplifier to amplify an RF modulated signal and generate a signal path output signal scaled by a gain of an actuator signal, and a power detector to detect a power associated with the signal path output signal. The system includes an ADC to receive, pre-filter and convert the detected envelope signal into a measurement signal, and a comparator block to receive the reference signal and the measurement signal, and generate an error signal based on the difference, and a controller to generate the actuator signal for controlling the gain of the signal path amplifier based on the error signal. | 12-03-2009 |
20100022192 | Systems and Methods for Transmitter/Receiver Diversity - Systems and methods for transmitter/receiver diversity for wireless communication systems are described herein. | 01-28-2010 |
20100061279 | Transmitting and Receiving Wireless Signals Via Dual Antennas - Systems, methods, and devices to transmit and receive wireless signals are described. | 03-11-2010 |
20100302106 | Impedance Tuning of Transmitting and Receiving Antennas - The present disclosure relates to impedance tuning of transmitting and receiving antennas. | 12-02-2010 |
20100302123 | Wireless Communication Device Antenna With Tuning Elements - The present disclosure relates to wireless communication device antennas with tuning elements. | 12-02-2010 |
20100304688 | Minimizing Mutual Couping - Disclosed herein are techniques, systems, and methods relating to minimizing mutual coupling between a first antenna and a second antenna. | 12-02-2010 |
20120178388 | Minimizing Mutual Coupling - Disclosed herein are techniques, systems, and methods relating to minimizing mutual coupling between a first antenna and a second antenna. In one implementation, a plurality of antennas and at least one tuning module are provided. A control module may be coupled to the tuning module. The control module may be configured to control the at least one tuning module to alter a phase and an amplitude of a control signal communicated to at least one of the plurality of antennas to reduce mutual coupling between the plurality of antennas. | 07-12-2012 |
20120293384 | IMPEDANCE TUNING OF TRANSMITTING AND RECEIVING ANTENNAS - The present disclosure relates to impedance tuning of transmitting and receiving antennas. | 11-22-2012 |
20130244593 | Agile and Adaptive Transmitter-Receiver Isolation - The disclosed invention relates to a transceiver system having one or more receive antennas that receive a first radio frequency (RF) signal and a plurality of transmit antennas that wirelessly transmit a second RF signal. A local channel determination unit provides data corresponding to the environment of local communication channels (i.e., the communication channels between the transmit antennas and the receive antennas) to a beamforming element, which enables beamforming functionality within the transmit and/or receive antennas (e.g., by using analog or digital weights to vary the radiation pattern generated by the transmit antennas) so as to attenuate RF signals extending between the transmit antennas and the receive antennas. By attenuating signals extending between the transmit and the receive antennas, a high degree of isolation is achieved between transmission and reception paths | 09-19-2013 |
20130244594 | Agile and Adaptive Wideband MIMO Antenna Isolation - The disclosed invention relates to a MIMO (multiple input, multiple output) wideband transceiver. In some cases, the MIMO wideband transceiver comprises a signal processor that outputs or receives a plurality of distinguishable data streams. A first data stream is provided to a first antenna port connected to a plurality of wideband antennas, while a second data stream is provided to a second antenna port connected to a wideband antenna. A spatial filter element configured to assign antenna weights to the plurality of wideband antennas, which cause the wideband antennas to operate in a manner that attenuates wireless signals, at a frequency range at which the wideband transmit wideband radiate, in the direction of the wideband antenna without attenuating the wireless signals in other directions. By attenuating signals extending between the plurality of wideband antennas and the wideband antenna, wideband decoupling between first and second antenna ports is achieved. | 09-19-2013 |
20140043201 | ANTENNA SYSTEM, METHOD AND MOBILE COMMUNICATION DEVICE - An antenna system includes a ground plane including at least one slot, a first antenna element coupled to a first portion of the ground plane, a second antenna element coupled to a second portion of the ground plane which is spaced apart from the first portion and a tuner configured to change the influence of the slot to a current flow through the ground plane from the first portion to the second portion. | 02-13-2014 |
20140062813 | ANTENNA TUNING VIA MULTI-FEED TRANSCEIVER ARCHITECTURE - The disclosed invention relates to an antenna configuration that is configured to tune the frequency of transmission without using filters. The antenna configuration comprises a tunable multi-feed antenna configured to wirelessly transmit electromagnetic radiation. A signal generator is configured to generate a plurality of signals that collectively correspond to a signal to be transmitted. The plurality of signals have a phase shift or amplitude difference therebetween. The plurality of signals are provided to a plurality of antenna feeds connected to different spatial locations of the tunable multi-feed antenna. The values of the phase shift and/or amplitude difference define an antenna reflection coefficient that controls the frequency characteristics that the tunable multi-feed antenna operates at, such that by varying the phase shift and or amplitude difference, the frequency characteristics can be selectively adjusted. | 03-06-2014 |
20140256273 | TUNABLE QUALITY FACTOR - The present disclosure relates to a wireless communication system configured to transforming the radiating mechanism of the antenna system in such a way to support different operating modes depending on the needs. In some examples, the wireless communication system comprises an antenna structure connected to a signal process unit. The antenna structure comprises a radiating mechanism configured to transmit or receive electromagnetic radiation. A switchable operating mode element is configured to receive a signal and to dynamically vary a quality factor of the radiating element by selectively routing the signal along one of a plurality of signal paths, which respectively provide different antenna parameters to the radiating mechanism, based upon a current operating mode of the wireless communication system. By dynamically varying a quality factor of the radiating element, the wireless communication system can effectively support different operating modes. | 09-11-2014 |
20150079913 | SEMICONDUCTOR DEVICE AND FABRICATION METHOD - The present disclosure relates to impedance tuning of transmitting and receiving antennas. | 03-19-2015 |