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    Antenna diversity arrangement for an rf transceiver
    2.
    发明专利
    Antenna diversity arrangement for an rf transceiver 未知

    公开(公告)号：GB2428917A

    公开(公告)日：2007-02-07

    申请号：GB0516057

    申请日：2005-08-04

    Applicant: MOTOROLA INC

    Inventor： FRIEDLANDER HAIM ,  BASRI ELIYAHU ,  SHIRAZI GADI

    IPC: H04B1/44 ,  H04B1/48 ,  H04B7/06 ,  H04B7/08

    Abstract: An antenna switching arrangement is disclosed for an rf transceiver which may operate at 2.4GHz or 5GHz. It has been recognised that antenna diversity, if required, is needed only in the receive mode and not in the transmit mode. The resulting circuit comprises a first antenna 113 connected to the common terminal (pole) of a first spdt switch 209, a second antenna 115 connected to the common terminal of a second spdt switch 213, the first and second switches being connected to respective transmitters 101 and 103. The first and second switches are connected to a third spdt switch 211 which in turn connects the antennas to a common receiver 105. This circuit connects each transmitter to its respective antenna through a path which includes only one transmit-receive switch, and thus reduces transmit power losses in comparison to prior art arrangements (fig. 1) in which the transmitter signal must pass through more than one switch.

    Circuit board having first and second inductors mounted on either side of the board
    5.
    发明专利
    Circuit board having first and second inductors mounted on either side of the board 未知

    公开(公告)号：GB2404091A

    公开(公告)日：2005-01-19

    申请号：GB0316573

    申请日：2003-07-15

    Applicant: MOTOROLA INC

    Inventor： FRIEDLANDER HAIM ,  BASRI ELIYAHU ,  SHIRAZI GADI

    IPC: H01F17/02 ,  H05K1/02 ,  H05K1/18

    Abstract: A circuit board construction 15 comprises a first inductor 13 electrically connected to a second inductor 14, where the first inductor is located on a first surface of the circuit board and the second inductor is located on the other surface of the circuit board. When each inductor has the same inductance, this construction allows the total inductance of the two inductors to remain constant during any deformation of the circuit board as the increase in inductance of one of the inductors as it contracts 19, cancels out the decrease in the inductance of the other, as it expands 17. The circuit board may be used in a voltage controlled oscillator (VCO) circuit in, for example, a mobile telephone. The inductors may be air core coiled inductors and the axes of the coils of the first and second inductors may be parallel to each other.

    ANTENNA DIVERSITY ARRANGEMENT, RF TRANSCEIVER ARRANGEMENT AND METHOD OF OPERATION
    6.
    发明申请
    ANTENNA DIVERSITY ARRANGEMENT, RF TRANSCEIVER ARRANGEMENT AND METHOD OF OPERATION 审中-公开
    天线分集安排，射频收发器安排和操作方法

    公开(公告)号：WO2007018803A3

    公开(公告)日：2007-11-01

    申请号：PCT/US2006025134

    申请日：2006-06-28

    Applicant: MOTOROLA INC ,  FRIEDLANDER HAIM ,  BASRI ELIYAHU ,  SHIRAZI GADI

    Inventor： FRIEDLANDER HAIM ,  BASRI ELIYAHU ,  SHIRAZI GADI

    IPC: H04B1/44 ,  H03C7/02 ,  H04B1/48 ,  H04B7/06 ,  H04B7/08 ,  H04B7/185 ,  H04Q3/02

    CPC classification number: H04B1/48 ,  H04B7/0602 ,  H04B7/0805 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/40 ,  Y02D70/444

    Abstract: An antenna diversity arrangement for use with an RF transceiver including: a first antenna (113), a second antenna (115), and a first T/R switching device (209) for coupling the first antenna alternatively to a transmitter connection (202) and a receiver connection (206). A selection switching device is provided for alternatively coupling the first antenna and the second antenna to a receiver connection. The arrangement includes a second T/R switching device (213) for coupling the second antenna (115) alternatively to a transmitter connection (101) and a receiver connection (208)and the selection switching device (211) is operable to couple alternatively (i) the first antenna (113) via the first T/R switching device (209); and (ii) the second antenna (115) via the second T/R switching device (213); to a common receiver connection (210).

    Abstract translation: 一种与RF收发器一起使用的天线分集装置，包括：第一天线（113），第二天线（115）和用于将第一天线交替地耦合到发射机连接（202）的第一T / R开关装置（209） 和接收机连接（206）。 选择开关装置被提供用于交替地将第一天线和第二天线耦合到接收器连接。 该装置包括用于将第二天线（115）交替地耦合到发射机连接（101）和接收机连接（208）的第二T / R切换设备（213），并且选择切换设备（211）可操作以交替地耦合 i）经由所述第一T / R切换装置（209）的所述第一天线（113）; 和（ii）经由第二T / R切换装置（213）的第二天线（115）; 到公共接收机连接（210）。

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