公开(公告)号：US20110128088A1

公开(公告)日：2011-06-02

申请号：US12903387

申请日：2010-10-13

Applicant: Yalin Jin ,  Vikram Krishnamurthy ,  John Michael Hooper

Inventor： Yalin Jin ,  Vikram Krishnamurthy ,  John Michael Hooper

IPC: H03H7/42

CPC classification number: H03H7/38 ,  H03H7/42

Abstract: A handheld communication device having an RF front end module has a switchable balun comprising a primary winding having a first two port winding and a second two port winding where a low noise amplifier is operatively coupled to the first and second two port windings and a power amplifier is operatively coupled to the first and second two port windings. A secondary winding is operatively coupled to an antenna, and a transceiver is operatively coupled to the low noise amplifier and the power amplifier. When the switchable balun is in a receive state, the antenna is operatively coupled to the transceiver through the low noise amplifier, and when the switchable balun is in a transmit state, the antenna is operatively coupled to the transceiver through the power amplifier. The ratio of the primary winding to the secondary winding is greater than a one-to-one ratio

Abstract translation: 具有RF前端模块的手持式通信设备具有可切换平衡 - 不平衡变压器，其包括具有第一两端口绕组和第二双端口绕组的初级绕组，其中低噪声放大器可操作地耦合到第一和第二两端口绕组和功率放大器 可操作地耦合到第一和第二两个端口绕组。 次级绕组可操作地耦合到天线，并且收发器可操作地耦合到低噪声放大器和功率放大器。 当可切换平衡不平衡转换器处于接收状态时，天线通过低噪声放大器可操作地耦合到收发器，并且当可切换平衡不平衡变换器处于发送状态时，天线通过功率放大器可操作地耦合到收发器。 初级绕组与次级绕组的比例大于一对一比例

公开(公告)号：US08368481B2

公开(公告)日：2013-02-05

申请号：US12903387

申请日：2010-10-13

Applicant: Yalin Jin ,  Vikram Krishnamurthy ,  John Michael Hooper

Inventor： Yalin Jin ,  Vikram Krishnamurthy ,  John Michael Hooper

IPC: H03H7/42 ,  H01P1/10

CPC classification number: H03H7/38 ,  H03H7/42

Abstract: A handheld communication device having an RF front end module has a switchable balun comprising a primary winding having a first two port winding and a second two port winding where a low noise amplifier is operatively coupled to the first and second two port windings and a power amplifier is operatively coupled to the first and second two port windings. A secondary winding is operatively coupled to an antenna, and a transceiver is operatively coupled to the low noise amplifier and the power amplifier. When the switchable balun is in a receive state, the antenna is operatively coupled to the transceiver through the low noise amplifier, and when the switchable balun is in a transmit state, the antenna is operatively coupled to the transceiver through the power amplifier. The ratio of the primary winding to the secondary winding is greater than a one-to-one ratio.

Abstract translation: 具有RF前端模块的手持式通信设备具有可切换平衡 - 不平衡变压器，其包括具有第一两端口绕组和第二双端口绕组的初级绕组，其中低噪声放大器可操作地耦合到第一和第二两端口绕组和功率放大器 可操作地耦合到第一和第二两个端口绕组。 次级绕组可操作地耦合到天线，并且收发器可操作地耦合到低噪声放大器和功率放大器。 当可切换平衡不平衡转换器处于接收状态时，天线通过低噪声放大器可操作地耦合到收发器，并且当可切换平衡不平衡变换器处于发送状态时，天线通过功率放大器可操作地耦合到收发器。 初级绕组与次级绕组的比例大于一对一比例。