摘要:
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.
摘要:
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.
摘要:
A modal antenna is formed within a battery assembly for use with a portable electronic device. In certain embodiments, the antenna is printed on an exterior surface of a battery enclosure using a conductive ink. In other embodiments, the antenna is attached, or etched, on a substrate; the substrate may at least partially include a battery housing. The antenna can include an Isolated Magnetic Dipole (IMD) antenna, or other radiating structure. Active components, such as active tuning components, are optionally included in the antenna-integrated battery assembly for the purpose of tuning the antenna.
摘要:
A system and method for optimizing the performance for MIMO are provided, the system including multiple antennas, including at least one modal antenna, wherein each of the at least one modal antenna has multiple modes corresponding to multiple radiation patterns, and a processor coupled to the multiple antennas and configured to select a mode among the multiple modes to optimize signal quality for each time interval based on a CQI by considering envelop correlation effects.
摘要:
An impedance tuning and optimization technique is described wherein an impedance interface is dynamically tuned prior to applying transmit power to the circuit. A coupled signal injected into the antenna port is used to optimize the tuning state of a tuning component such that the impedance properties of the circuit are optimized prior to application of transmit power. A coupled or injected signal at an alternate frequency band can be utilized to determine tuning state or parameters at the frequency of interest by first tuning at the frequency of the coupled or injected signal and then accessing a data base containing information that relates tuning parameters across multiple frequency bands for various levels of antenna de-tuning. A time-savings is realized when the tuning circuit is optimized prior to activation or use of the transmit/receive path.
摘要:
A system and method for optimizing performance of an application are provided. The system includes an application processor including a logic section, multiple peripherals coupled to the application processor, and an antenna system coupled to some of the peripherals, where the antenna system includes multiple antennas including one or more modal antennas. Each of the one or more modal antennas has multiple modes corresponding to multiple radiation patterns, respectively. The logic section controls the antenna system to have a configuration that optimizes gain associated with networks and performance of the application selected for a time period.
摘要:
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.
摘要:
An antenna system is integrated into a cover or accessory and adapted to couple to an antenna in a host device to improve transmission and reception of signals. The antenna system can be passive or active, with the active antenna system designed to amplify coupled signals on the integrated antenna elements in the cover or accessory. Single or multiple frequency bands can be improved with the integrated antenna system, and multiple antennas in the host device can be coupled to and improved. The antenna system can couple to the existing antennas in the host device by capacitive coupling, i.e. no physical contact required, or a connector can be designed into the cover or accessory containing the integrated antenna system that makes contact to electrical ground of the host device or power supply signals or other control signals.
摘要:
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.
摘要:
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.