Patent application number | Description | Published |
20120139571 | System for Field Testing Wireless Devices With Reduced Multipath Interference - A portable test chamber with an open top may serve as a field testing apparatus for wireless testing of electronic devices. A wireless device under test may be mounted within a cavity in the test chamber. The cavity may be surrounded by a dielectric lining of anechoic material. A layer of electromagnetic shielding such as metal foil may cover the outer surfaces of the dielectric lining. The chamber may have a box shape with a rectangular opening at its top. Satellite navigation system signals or other wireless signals may be received through the opening at the top of the test chamber during testing. The electromagnetic shielding may reduce the effects of multipath interference during field tests. | 06-07-2012 |
20130059546 | Radio-Frequency Power Amplifier Circuitry with Power Supply Voltage Optimization Capabilities - Electronic devices with wireless communications capabilities are provided. The electronic device may include storage and processing circuitry, power amplifier circuitry, power supply circuitry, etc. The storage and processing circuitry may direct the power amplifier circuitry to operate using a desired power mode, in allocated resource blocks within a particular frequency channel, and at a given output power level. The power supply circuitry may bias the power amplifier circuitry with a power supply voltage. The electronic device may be subject to in-band emissions requirements and adjacent channel leakage requirements that restrict the power levels produced by the device on frequencies that are not allocated to the device. The electronic device may optimize the power amplifier supply voltage based on allocated resource blocks by minimizing the supply voltage to reduce power consumption while ensuring that emissions requirements are satisfied. | 03-07-2013 |
20130065541 | Radio-Frequency Power Amplifier Circuitry with Linearity Optimization Capabilities - An electronic device may be located in a geographical cell that is served by a base station. The electronic device may communicate with the base station on a frequency band. The frequency band may be subject to adjacent band emissions requirements to help prevent interference with wireless devices that are operating in adjacent frequency bands. The adjacent band emission requirements may vary based on the frequency band used to communicate with the base station, the geographical cell, and/or the presence of public safety radios. To satisfy the adjacent band emissions requirements while minimizing power consumption, the electronic device may receive cell information from the base station and adjust power amplifier linearity based on the received information. | 03-14-2013 |
Patent application number | Description | Published |
20130190038 | Electronic Device With Dynamic Amplifier Linearity Control - An electronic device may include antenna structures. Wireless transmitter circuitry such as cellular telephone transmitter circuitry and wireless local area network circuitry may transmit signals using the antenna structures. A wireless receiver may receive signals from the antenna structures through an adjustable-linearity amplifier. The wireless receiver may operate in a receive band such as a satellite navigation system receive band. During operation of the electronic device, control circuitry in the device may analyze the frequencies and powers of the transmitted signals to determine whether there is a potential for interference for the receive band to be generated in the adjustable-linearity amplifier. In response to determining that there is a potential for interference, the control circuitry may increase the linearity of the adjustable-linearity amplifier. | 07-25-2013 |
20130257659 | Antenna Having Flexible Feed Structure with Components - Electronic devices may include antenna structures. The antenna structures may form an antenna having first and second feeds at different locations. Transceiver circuitry for transmitting and receiving radio-frequency antenna signals may be mounted on one end of a printed circuit board. Transmission line structures may be used to convey signals between an opposing end of the printed circuit board and the transceiver circuitry. The printed circuit board may be coupled to an antenna feed structure formed from a flexible printed circuit using solder connections. The flexible printed circuit may have a bend and may be screwed to conductive electronic device housing structures using one or more screws at one or more respective antenna feed terminals. Electrical components such as an amplifier circuit and filter circuitry may be mounted on the flexible printed circuit. | 10-03-2013 |
20130271328 | Impedance Reference Structures for Radio-Frequency Test Systems - A radio-frequency test system configured for testing device structures under test is provided. The test system may include a radio-frequency tester, a test probe that is coupled to the tester, and an auxiliary test fixture that receives the device structures under test. During testing, the device structures under test may be mounted on the auxiliary test fixture. The auxiliary test fixture may provide a ground contact point and a ground reference plane. The device structures under test may include a radio-frequency circuit coupled to a conductive member via a signal path. During testing, the test probe may mate with the conductive member on the device structures under test and the ground contact point on the auxiliary test fixture. The ground reference plane in the auxiliary test fixture may serve to provide proper grounding for the signal path to help improve the accuracy of test results associated with the radio-frequency circuit. | 10-17-2013 |
20150035706 | Antenna Having Flexible Feed Structure with Components - Electronic devices may include antenna structures. The antenna structures may form an antenna having first and second feeds at different locations. Transceiver circuitry for transmitting and receiving radio-frequency antenna signals may be mounted on one end of a printed circuit board. Transmission line structures may be used to convey signals between an opposing end of the printed circuit board and the transceiver circuitry. The printed circuit board may be coupled to an antenna feed structure formed from a flexible printed circuit using solder connections. The flexible printed circuit may have a bend and may be screwed to conductive electronic device housing structures using one or more screws at one or more respective antenna feed terminals. Electrical components such as an amplifier circuit and filter circuitry may be mounted on the flexible printed circuit. | 02-05-2015 |
Patent application number | Description | Published |
20110136462 | METHODS FOR OPTIMIZING POWER AMPLIFIER SETTINGS FOR OPERATION AT DIFFERENT RADIO-FREQUENCY BANDS - Electronic devices such as cellular telephones may include wireless communications circuitry such as power amplifiers. Power amplifiers, transmission lines, and other circuit associated the power amplifiers may generate different amounts of heat depending on their operating frequency. High-heat-producing power amplifiers may be biased at lower bias voltages than low-heat-producing amplifiers to equalize temperatures and enhance performance. Performance may also be optimized by placing power amplifiers on a printed circuit board so that the high band amplifiers are placed in regions that can dissipate more heat, whereas low band amplifiers are placed in regions that dissipate less heat. | 06-09-2011 |
20110136493 | METHODS FOR GEOGRAPHIC OPTIMIZATION OF CELLULAR TELEPHONE TRANSMIT POWER SETTINGS - Portable user devices are provided that communicate wirelessly with base stations. A user device may include a transceiver, a power amplifier, a voltage supply, and a global positioning system (GPS) unit. The device may transmit signals at a certain transmit power to a neighboring base station. The device may log the time spent transmitting at each power level. Each data point may be tagged with the current location of the device. The logs of each device may be aggregated by a power optimization server. The power optimization server may calculate optimum power settings for each region and for each type of device. A region may be any desirable size ranging from the size of a single cell to an entire continent. Device users may download updated optimum settings. A device may automatically detect and select the optimum transmit power setting during operation depending on its current location. | 06-09-2011 |
20110140957 | METHODS FOR REDUCING GLOBAL POSITIONING SYSTEM ERRORS IN PORTABLE ELECTRONIC DEVICES - A portable user device may provide Global Positioning System (GPS) services. The device may include a GPS unit. The GPS unit may provide accurate information about the current position, direction, and speed of the device. A user may use the device to perform tasks. Certain tasks may generate excess heat that causes the GPS unit to produce erroneous data. Methods can be used to acquire accurate data samples that are associated with the respective tasks. The device may wait for a period of time after the start of a task before acquiring a GPS sample. The device may also buffer GPS samples and to take the most recent buffered sample as the acquired GPS sample. The device may take a GPS sample immediately after the start of a task, before error starts to arise. GPS samples may be buffered and used to calculate an extrapolated data sample value. | 06-16-2011 |