Qualcomm Incorporated

Atheros Communications, Inc.

Donald Farrell Breslin

Jeffrey M Gilbert

Allen Minh-Triet Tran

Mohammad Ali Tassoudji

Lida Akhoondzadehasl

Enis Akay

Xiaohua Yang

An antenna structure is disclosed that includes a dipole antenna and a slot antenna extending along a first axis. The dipole antenna and the slot antenna each have a radiation pattern that is omni-directional in an azimuth plane of the Earth. The dipole antenna radiates vertically polarized electric field, and the slot antenna radiates a horizontally polarized electric field.

Antenna structure having orthogonal polarizations

An antenna structure is disclosed that includes a first antenna extending from a substrate, a second antenna formed on the substrate, and first and second parasitic elements formed on the substrate. The first antenna provides an omni-directional radiation pattern in the azimuth plane for vertically polarized signals, and the second antenna provides an omni-directional radiation pattern in the azimuth plane for horizontally polarized signals. The parasitic elements absorb and re-radiate electromagnetic waves radiated from the second antenna.

Collocated omnidirectional dual-polarized antenna

This disclosure involves methods and systems for compensating for imbalanced transmit antenna gains. A transmit controller independently samples the received signal in each chain of a transceiver selectively adjusts the transmit power at each antenna to minimize any indicated imbalance to improve performance at the node receiving the transmission.

Systems and methods for compensating antenna gain imbalance

A method and system of optimizing transmit beam forming in a multiple radio wireless system is provided. A stimulus signal can be provided to an analog receive input of a device under test (DUT), wherein the DUT includes multiple radios. A receive phase and amplitude can be measured at baseband using the stimulus signal for each radio. At this point, a receive weight and its conjugate can be determined using the receive phases and amplitudes. A calibration vector and its conjugate can also be determined, wherein a product of the receive weight conjugate and the calibration vector conjugate generate a transmit weight. This transmit weight can be applied to transmit signals during the transmit beam forming using the multiple radios.

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Sunnyvale, CA, United States of America

Donald Farrell Breslin