Abstract: Electronic devices may be provided that include radio-frequency transceiver circuitry and antennas. An antenna may be formed from an antenna resonating element and an antenna ground. The antenna resonating element may have a shorter portion that resonates at higher communications band frequencies and a longer portion that resonates at lower communications band frequencies. An extended portion of the antenna ground may form an inverted-F antenna resonating element portion of the antenna resonating element. The antenna resonating element may be formed from a peripheral conductive electronic device housing structure that is separated from the antenna ground by an opening. A first antenna feed may be coupled between the peripheral conductive electronic device housing structures and the antenna ground across the opening. A second antenna feed may be coupled to the inverted-F antenna resonating element portion of the antenna resonating element.

Abstract: Electronic devices may include antenna structures. The antenna structures may form an antenna having first and second feeds at different locations. A first transceiver may be coupled to the first feed using a first circuit. A second transceiver may be coupled to the second feed using a second circuit. The first and second feeds may be isolated from each other using the first and second circuits. The second circuit may have a notch filter that isolates the second feed from the first feed at operating frequencies associated with the first transceiver. The first circuit may include an adjustable component such as an adjustable capacitor. The adjustable component may be placed in different states depending on the mode of operation of the second transceiver to ensure that the first feed is isolated from the second feed.

Abstract: Test systems for characterizing devices under test (DUTs) are provided. A test system for testing a DUT in a shunt configuration may include a signal generator and a matching network that is coupled between the signal generator and the DUT and that is optimized to apply desired voltage/current stress to the DUT with reduced source power. The matching network may be configured to provide matching and desired stress levels at two or more frequency bands. In another suitable embodiment, a test system for testing a DUT in a series configuration may include a signal generator, an input matching network coupled between the DUT and a first terminal of the DUT, and an output matching network coupled between the DUT and a second terminal of the DUT. The input and output matching network may be optimized to apply desired voltage/current stress to the DUT with reduced source power.

Abstract: An electronic device may be provided with a housing. The housing may have a periphery that is surrounded by peripheral conductive structures such as a segmented peripheral metal member. A segment of the peripheral metal member may be separated from a ground by a slot. An antenna feed may have a positive antenna terminal coupled to the peripheral metal member and a ground terminal coupled to the ground and may feed both an inverted-F antenna structure that is formed from the peripheral metal member and the ground and a slot antenna structure that is formed from the slot. Control circuitry may tune the antenna by controlling adjustable components that are coupled to the peripheral metal member. The adjustable components may include adjustable inductors and adjustable capacitors.

Abstract: An electronic device, including: a first body, a second body, a first coupling member and a second coupling member; in the case where the first body and the second body are located in a first relative position, the first body and the second body are coupled together by cooperation between the first coupling member and the second coupling member; and in the case where the first body and the second body are located in a second relative position different from the first relative position, the first body and the second body are decoupled from each other by cooperation between the first coupling member and the second coupling member.

Abstract: Allocation of buffers for a TCP proxy session between a client and a server by a service gateway includes: monitoring dynamic network behaviors for server and client side sessions of the TCP proxy session; and allocating capacity for a server side buffer and capacity for a client side buffer in a memory buffer based on the dynamic server side network behaviors, the dynamic client side network behaviors, and a weighted average of a capacity of the memory buffer. In one approach to the allocation, the gateway determines whether an available capacity of the server or client side buffer is sufficient to store a data packet. If not sufficient, the allocated capacity of the server or client side buffer is increased based on measurements of the dynamic network behaviors and the weighted average, and the available capacity of the server or client side buffer is adjusted accordingly.

Abstract: A manufacturing system for assembling wireless electronic devices is provided. The manufacturing system may include test stations for testing the radio-frequency performance of components that are to be assembled within the electronic devices. A reference test station may be calibrated using calibration coupons having known radio-frequency characteristics. The calibration coupons may include transmission line structures. The reference test station may measure verification standards to establish baseline measurement data. The verification standards may include circuitry having electrical components with given impedance values. Many verification coupons may be measured to enable testing for a wide range of impedance values. Test stations in the manufacturing system may subsequently measure the verification standards to generate test measurement data.

Abstract: A method for performing keypad input in a portable terminal is provided. The method includes displaying, on a touch screen, a keypad and an operating zone; detecting a first user operation performed in the operating zone; identifying, by a processor, a key from the keypad, the key being identified based on the first user operation; and inputting the selected key.

Abstract: Radio frequency test systems for characterizing antenna performance in various radio coexistence scenarios are provided. In one suitable arrangement, a test system may be used to perform passive radio coexistence characterization. During passive radio coexistence characterization, at least one signal generator may be used to feed aggressor signals directly to antennas within an electronic device under test (DUT). The aggressor signals may generate undesired interference signals in a victim frequency band, which can then be received and analyzed using a spectrum analyzer. During active radio coexistence characterization, at least one radio communications emulator may be used to communicate with a DUT via a first test antenna. While the DUT is communicating with the at least one radio communications emulator, test signals may also be conveyed between DUT 10 and a second test antenna. Test signals conveyed through the second test antenna may be used in obtaining signal interference level measurements.

Abstract: Allocation of buffers for a TCP proxy session between a client and a server by a service gateway includes: monitoring dynamic network behaviors for server and client side sessions of the TCP proxy session; and allocating capacity for a server side buffer and capacity for a client side buffer in a memory buffer based on the dynamic server side network behaviors, the dynamic client side network behaviors, and a weighted average of a capacity of the memory buffer. In one approach to the allocation, the gateway determines whether an available capacity of the server or client side buffer is sufficient to store a data packet. If not sufficient, the allocated capacity of the server or client side buffer is increased based on measurements of the dynamic network behaviors and the weighted average, and the available capacity of the server or client side buffer is adjusted accordingly.

Abstract: A test system for testing an antenna tuning element is provided. The test system may include a tester, a test fixture, and a probing structure. The probing structure may include probe tips configured to mate with corresponding solder bumps formed on a device under test (DUT) containing an antenna tuning element. The DUT may be tested in a shunt or series configuration. The tester may be electrically coupled to the test probe via first and second connectors on the test fixture. An adjustable load circuit that is coupled to the second connector may be configured in a selected state so that a desired amount of electrical stress may be presented to the DUT during testing. The tester may be used to obtain measurement results on the DUT. Systematic effects associated with the test structures may be de-embedded from the measured results to obtain calibrated results.

Abstract: A test system for testing a device under test (DUT) is provided. The test system may include a DUT receiving structure configured to receive the DUT during testing and a DUT retention structure that is configured to press the DUT against the DUT receiving structure so that DUT cannot inadvertently shift around during testing. The DUT retention structure may include a pressure sensor operable to detect an amount of pressure that is applied to the DUT. The DUT retention structure may be raised and lowered vertically using a manually-controlled or a computer-controlled positioner. The positioner may be adjusted using a coarse tuning knob and a fine tuning knob. The positioner may be calibrated such that the DUT retention structure applies a sufficient amount of pressure on the DUT during production testing.

Abstract: A test system for characterizing an antenna tuning element is provided. The test system may include a test host, a radio-frequency tester, and a test fixture. The test system may calibrate the radio-frequency tester using known coaxial standards. The test system may then calibrate transmission line effects associated with the test fixture using a THRU-REFLECT-LINE calibration algorithm. The antenna tuning element may be mounted on a test socket that is part of the test fixture. While the antenna tuning element is mounted on the test socket, scattering parameter measurements may be obtained using the radio-frequency tester. An equivalent circuit model for the test socket can be obtained based on the measured scattering parameters and known characteristics of the antenna tuning element. Once the test socket has been characterized, an equivalent circuit model for the antenna tuning element can be obtained by extracting suitable modeling parameters from the measured scattering parameters.

Abstract: A method including: detecting a first input on a first specific element of a user interface of an electronic device, the detection of the first input triggering a selecting mode; while in the selecting mode, when detecting a plurality of second inputs on second specific elements of the user interface, selecting the second specific elements, each second specific element corresponding to an electronic content to be displayed; storing the selected second specific elements; detecting a third input on a third specific element of the user interface, the detection of the third input terminating the selecting mode; after terminating the selecting mode, displaying at least an electronic content corresponding to a first stored second specific element; and detecting a fourth input on a fourth specific element of the user interface triggering the display of another electronic content corresponding to another stored second specific element.

Abstract: A wireless electronic device may contain at least one antenna tuning element for use in tuning the operating frequency range of the device. The antenna tuning element may include radio-frequency switches, continuously/semi-continuously adjustable components such as tunable resistors, inductors, and capacitors, and other load circuits that provide desired impedance characteristics. A test station may be used to measure the radio-frequency characteristics associated with the tuning element. The test station may provide adjustable temperature, power, and impedance control to help emulate a true application environment for the tuning element without having to place the tuning element within an actual device during testing. The test system may include at least one signal generator and a tester for measuring harmonic distortion values and may include at least two signal generators and a tester for measuring intermodulation distortion values.

Abstract: A method to generate name records by a service gateway includes: receiving a name service request including a name from a host; creating a name service request using the name; sending the name service request to a name service server; receiving a response from the name service server, the response including a service server name record with one or more service server name entries corresponding to the name; generating and storing service gateway name records using the name and the name entries; and sending a selected service gateway name record to the host as a response to the name service request. When a subsequent name service request including the name is received, the service gateway compares the name against the stored service gateway name records, and in response to finding a match, sending the given service gateway name record as a response to the subsequent name service request.

Abstract: A service gateway includes a fast path module for processing data packets without using packet buffers and a normal path module for processing data packets using packet buffers. The fast path module receives a service request data packet from a client side session, determines that the service request data packet cannot be processed by the fast path module, and in response, sends the service request data packet to the normal path module. After receiving the service request data packet, the normal path module retrieves a first proxy session record created by the fast path module, where the first proxy session record is associated with a client session record for the client side session, creates a second proxy session record based on the service request data packet and the client session record, and processes the service request data packet according to the second proxy session record.

Abstract: The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates.

Abstract: Dependency information corresponding to an artifact can be generated. In response to the generation of the dependency information, information version information is generated for the dependency corresponding to that of the artifact. In response to the update of the artifact, the dependency information corresponding to the artifact is updated. In response to the update of the dependency information, new version information is assigned to the updated dependency information, such that the new version information corresponds to the version information of the updated artifact.

Abstract: A mechanism is provided for dynamically controlling the process of an electronic meeting that includes at least two sub-meetings. A monitoring module monitors the occurrence of a trigger event for triggering switching between different sub-meetings in the process of the electronic meeting. A control module breaks the connection between the attendees of the current sub-meeting and the meeting resources defined in the main meeting room of the electronic meeting in response to monitoring the occurrence of the trigger event by the monitoring module. The control module determines the next sub-meeting of the electronic meeting and its attendees according to the meeting agenda, that specifies the sequence of the sub-meetings constituting the meeting and at least one attendee of each sub-meeting. The control module establishes a connection between the attendees of the next sub-meeting and the meeting resources defined in the main meeting room of the electronic meeting.