| Patent application number | Description | Published |
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| 20080253345 | Wireless communications circuitry with antenna sharing capabilities for handheld electronic devices - Handheld electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may have first and second transceiver circuits that operate in the same radio-frequency band using different communications protocols. The wireless communications circuitry may have a configurable radio-frequency combiner and divider circuit that is coupled between an antenna and the first and second transceiver circuits. The combiner and divider circuit can be configured to support simultaneous use of the antenna by the first and second transceiver circuits. When simultaneous use is not required, the combiner and divider circuit can be used by either the first transceiver circuit or the second transceiver circuit. | 10-16-2008 |
| 20090096683 | Handheld electronic devices with antenna power monitoring - Handheld electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may include an antenna. A radio-frequency coupler may be coupled to the antenna. Transceiver circuitry may be used to transmit and receive radio-frequency signals through the coupler and the antenna. A reflected power detection circuit may be connected to the coupler. When the transceiver circuitry transmits radio-frequency signals, some of the signals are reflected back from the antenna into the coupler. The coupler directs the reflected antenna signals into the reflected power detection circuit. Processing circuitry may analyze a reflected power signal from the reflected power detection circuit to determine whether operation of the antenna is being disrupted by the placement of a user's hand over the antenna or other proximity effects. If antenna operation is being disrupted, the user may be alerted or other suitable actions may be taken. | 04-16-2009 |
| 20100113011 | WIRELESS ELECTRONIC DEVICE TESTING SYSTEM - Cellular telephones and other wireless electronic devices may be tested using test equipment. The test equipment may include a call box and a test host. During testing, a wireless electronic device may be placed in a test chamber. The test chamber may include an antenna that is connected to the test equipment. The test equipment may use the antenna to communicate wirelessly with the wireless electronic device during testing. The wireless electronic device may communicate with the test equipment using messages that are compliant with cellular telephone communications protocols such as short message service (SMS) messages. These wireless messages may be used to convey test information to the test equipment from the wireless electronic device. These wireless messages may also be used to send control commands to the wireless electronic device during testing and to store test results in the wireless electronic device. | 05-06-2010 |
| 20100248799 | ELECTRONIC DEVICE WITH SHARED MULTIBAND ANTENNA AND ANTENNA DIVERSITY CIRCUITRY - Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may have antenna diversity circuitry that allows an optimum antenna in an antenna structure to be switched into use during device operations. The antenna structure may be shared between multiple radio-frequency transceivers in a radio-frequency transceiver circuit. The radio-frequency transceiver circuit may be coupled to the antenna structure using switching and filtering circuitry. The filtering circuitry may include a diplexer that divides radio-frequency signals into a divided signal path based on frequency. The filtering circuitry may also include bandpass filters that are interposed in each branch of the divided signal path. Switching circuitry in the switching and filtering circuitry may be used to selectively configure the wireless communications circuitry in transmit and receive modes using multiple communications bands. | 09-30-2010 |
| 20100260082 | SHARED MULTIBAND ANTENNAS AND ANTENNA DIVERSITY CIRCUITRY FOR ELECTRONIC DEVICES - Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may have antenna diversity circuitry that allows an optimum antenna or optimum antennas in an antenna structure to be switched into use during device operations. The antenna structure may be shared between multiple radio-frequency transceivers in a radio-frequency transceiver circuit. The radio-frequency transceiver circuit may be coupled to the antenna structure using switching and filtering circuitry. The filtering circuitry may include one or more diplexers that divide radio-frequency signals into divided signal paths based on frequency. The filtering circuitry may also include low pass, high pass, and bandpass filters that are interposed in the divided signal paths. Switching circuitry in the switching and filtering circuitry may be used to selectively configure the wireless communications circuitry in transmit and receive modes using multiple communications bands. | 10-14-2010 |
| 20110194546 | WIRELESS COMMUNICATIONS CIRCUITRY WITH SIMULTANEOUS RECEIVE CAPABILITIES FOR HANDHELD ELECTRONIC DEVICES - Handheld electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry has simultaneous reception functions that allow the handheld devices to simultaneously receive multiple communications signals in a single communications band. The handheld electronic devices may include cellular telephones with music player functionality or other portable devices. The handheld electronic devices may have local wireless communications capabilities for supporting local wireless links such as WiFi and Bluetooth links. Using the simultaneous reception functions of the wireless communications circuitry, users of the handheld electronic devices can simultaneously receive signals such as WiFi and Bluetooth signals. | 08-11-2011 |
| 20110319035 | WIRELESS CIRCUITS WITH MINIMIZED PORT COUNTS - An electronic device has wireless communications circuitry including a triplexer. The wireless communications circuitry may be used in first and second modes. In the first mode, the device communicates in a first communications band using a transmitter in a first uplink frequency range associated with the first communications band and using a receiver in a first downlink frequency range associated with the first communications band. In the second mode, the device communicates in a second communications band using a transmitter to transmit in a second uplink frequency range associated with the second communications band and using the receiver to receive in a second downlink frequency range associated with the second communications band. Signals in the two downlink frequency ranges may pass through a common bandpass filter in the triplexer. Two additional bandpass filters in the triplexer may be used to respectively handle the two uplink frequency ranges. | 12-29-2011 |
| 20120009887 | WIRELESS CIRCUITRY WITH REDUCED HARMONIC INTERFERENCE - An electronic device has wireless communications circuitry that includes transmitters and receivers. Antenna structures may be coupled to the transmitters and receivers to support radio-frequency signal transmission and radio-frequency signal reception operations. Switching circuitry such as first and second radio-frequency switches may be used to support multiple communications bands of interest. A low band set of transmitters may be associated with the first switch and a high band set of transmitters may be associated with the second switch. The switches can be configured in real time to switch a desired communications band into use. As transmitted signals at frequency f pass through the switches, harmonics at | 01-12-2012 |
