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    Multi-band impedance tuners using weakly-coupled LC resonators
    31.
    发明授权
    Multi-band impedance tuners using weakly-coupled LC resonators 有权

    公开(公告)号：US09716481B2

    公开(公告)日：2017-07-25

    申请号：US14554943

    申请日：2014-11-26

    Applicant: RF Micro Devices, Inc.

    Inventor： George Maxim ,  Dirk Robert Walter Leipold ,  Baker Scott

    IPC: H03H7/01 ,  H03H7/40 ,  H01F17/00 ,  H03F1/56 ,  H03F3/24 ,  H03H7/38

    Abstract: Radio frequency (RF) filter structures and related methods and RF front-end circuitry are disclosed. In one embodiment, an RF filter structure includes a first terminal and a first tunable RF filter path defined between the first terminal and a second terminal. The first tunable RF filter path is tunable to provide impedance matching between the first terminal and the second terminal at a first frequency. The first frequency may be provided within a first frequency band. Additionally, the RF filter structure includes a second tunable RF filter path defined between the first terminal and the second terminal. The second tunable RF filter path is tunable to provide impedance matching between the first terminal and the second terminal at a second frequency. The second frequency may be within a second frequency band. In this manner, the RF filter structure is configured to provide impedance tuning for multiple impedance bands simultaneously.

    RADIO FREQUENCY (RF) FRONT-END WITHOUT SIGNAL SWITCHES
    33.
    发明申请
    RADIO FREQUENCY (RF) FRONT-END WITHOUT SIGNAL SWITCHES 有权
    无信号频率（RF）前端无信号开关

    公开(公告)号：US20170019143A1

    公开(公告)日：2017-01-19

    申请号：US15099686

    申请日：2016-04-15

    Applicant: RF Micro Devices, Inc.

    Inventor： Marcus Granger-Jones ,  Dirk Robert Walter Leipold ,  George Maxim ,  Baker Scott ,  Nadim Khlat

    IPC: H04B1/48

    CPC classification number: H04B1/48

    Abstract: Disclosed is an RF front-end with improved insertion loss having at least a first resonator with a first port and a second port and at least a second resonator having a third port and a fourth port, wherein the first resonator and the second resonator are magnetically coupled by no more than 5%. Also included is at least one coupling structure coupled between the second port of the first resonator and the third port of the second resonator, wherein the coupling structure has a coupling control input for varying a coupling coefficient between the first resonator and the second resonator such that an RF signal transfer between the first port of the first resonator and the fourth port of the second resonator is controllably variable between 5% and 95%.

    Abstract translation: 公开了具有改进的插入损耗的RF前端，其具有至少第一谐振器，其具有第一端口和第二端口，以及至少第二谐振器具有第三端口和第四端口，其中第一谐振器和第二谐振器是磁性的 加上不超过5％。 还包括耦合在第一谐振器的第二端口和第二谐振器的第三端口之间的至少一个耦合结构，其中耦合结构具有用于改变第一谐振器和第二谐振器之间的耦合系数的耦合控制输入，使得 在第一谐振器的第一端口和第二谐振器的第四端口之间的RF信号传输可控地在5％和95％之间变化。

    SLOW-WAVE TRANSMISSION LINE FORMED IN A MULTI-LAYER SUBSTRATE
    35.
    发明申请
    SLOW-WAVE TRANSMISSION LINE FORMED IN A MULTI-LAYER SUBSTRATE 有权
    在多层基板上形成的慢波传输线

    公开(公告)号：US20160126608A1

    公开(公告)日：2016-05-05

    申请号：US14921218

    申请日：2015-10-23

    Applicant: RF Micro Devices, Inc.

    Inventor： Dirk Robert Walter Leipold ,  George Maxim ,  Marcus Granger-Jones ,  Baker Scott

    IPC: H01P9/00

    CPC classification number: H01P1/20381 ,  H01P3/085 ,  H01P5/028 ,  H01P9/006 ,  H05K1/00 ,  H05K1/0219 ,  H05K1/0239 ,  H05K1/0298 ,  H05K3/4611 ,  H05K2201/097

    Abstract: The present disclosure relates to a slow-wave transmission line for transmitting slow-wave signals with reduced loss. In this regard, the slow-wave transmission line is formed in a multi-layer substrate and includes an undulating signal path. The undulating signal path includes at least two loop structures, wherein each loop structure includes at least two via structures connected by at least one intra-loop trace. The undulating signal path further includes at least one inter-loop trace connecting the at least two loop structures. Additionally, the slow-wave transmission line includes a first ground structure disposed along the undulating signal path. In this manner, a loop inductance is formed by each of the at least two loop structures, while a first distributed capacitance is formed between the undulating signal path and the ground structure.

    Abstract translation: 本发明涉及用于以较低损耗传输慢波信号的慢波传输线。 在这方面，慢波传输线形成在多层基板中，并且包括起伏的信号路径。 起伏信号路径包括至少两个环路结构，其中每个环路结构包括通过至少一个环路内线路连接的至少两个通孔结构。 起伏信号路径还包括连接至少两个环路结构的至少一个环路间迹线。 此外，慢波传输线包括沿着起伏信号路径设置的第一接地结构。 以这种方式，由至少两个环形结构中的每一个形成环路电感，同时在起伏信号路径和地面结构之间形成第一分布电容。

    Transformer-based power amplifier stabilization and reference distortion reduction
    36.
    发明授权
    Transformer-based power amplifier stabilization and reference distortion reduction 有权
    基于变压器的功放稳定和参考失真减少

    公开(公告)号：US09300260B2

    公开(公告)日：2016-03-29

    申请号：US14215774

    申请日：2014-03-17

    Applicant: RF Micro Devices, Inc.

    Inventor： George Maxim ,  Baker Scott ,  Ming Tsai ,  Alireza Shirvani

    IPC: H03F1/32 ,  H03F3/193 ,  H03F1/14 ,  H03F1/34 ,  H03F1/56 ,  H03F3/195 ,  H01L23/66 ,  H01L23/498 ,  H01L23/00

    CPC classification number: H03F3/193 ,  H01L23/49822 ,  H01L23/49827 ,  H01L23/66 ,  H01L24/16 ,  H01L2223/6644 ,  H01L2224/16225 ,  H03F1/14 ,  H03F1/347 ,  H03F1/565 ,  H03F3/195 ,  H03F2200/451

    Abstract: This disclosure relates generally to radio frequency (RF) amplification devices and methods of operating the same. In one embodiment, an RF amplification device includes an RF amplification circuit and a stabilizing transformer network. The RF amplification circuit defines an RF signal path and is configured to amplify an RF signal propagating in the RF signal path. The stabilizing transformer network is operably associated with the RF signal path defined by the RF amplification circuit. Furthermore, the stabilizing transformer network is configured to reduce parasitic coupling along the RF signal path of the RF amplification circuit as the RF signal propagates in the RF signal path. In this manner, the stabilizing transformer network allows for inexpensive components to be used to reduce parasitic coupling while allowing for smaller distances along the RF signal path.

    Abstract translation: 本公开一般涉及射频（RF）放大装置及其操作方法。 在一个实施例中，RF放大装置包括RF放大电路和稳定变压器网络。 RF放大电路定义RF信号路径并且被配置为放大在RF信号路径中传播的RF信号。 稳定变压器网络与由RF放大电路限定的RF信号路径可操作地相关联。 此外，稳定变压器网络被配置为当RF信号在RF信号路径中传播时减小沿着RF放大电路的RF信号路径的寄生耦合。 以这种方式，稳定变压器网络允许使用便宜的部件来减少寄生耦合，同时允许沿着RF信号路径的较小的距离。

    HYBRID ACTIVE AND PASSIVE TUNABLE RF FILTERS
    37.
    发明申请
    HYBRID ACTIVE AND PASSIVE TUNABLE RF FILTERS 审中-公开
    混合有源和无源TUNABLE射频滤波器

    公开(公告)号：US20150092625A1

    公开(公告)日：2015-04-02

    申请号：US14555557

    申请日：2014-11-26

    Applicant: RF Micro Devices, Inc.

    Inventor： Dirk Robert Walter Leipold ,  George Maxim ,  Baker Scott

    IPC: H03H7/01 ,  H04L5/14 ,  H01P1/20

    CPC classification number: H04L5/1461 ,  H01F17/0013 ,  H01P1/20 ,  H03F1/56 ,  H03F3/195 ,  H03F3/245 ,  H03F3/68 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2200/429 ,  H03F2200/546 ,  H03H7/463

    Abstract: RF communications circuitry includes a first RF filter structure, which is disclosed. The first RF filter structure includes a first passive group of RF resonators and active loss-reduction circuitry. The active loss-reduction circuitry is coupled to the first passive group of RF resonators. The active loss-reduction circuitry uses self-limiting positive feedback to reduce signal loss in the first passive group of RF resonators. Additionally, the active loss-reduction circuitry limits the self-limiting positive feedback to prevent self-oscillation in the active loss-reduction circuitry.

    Abstract translation: RF通信电路包括公开的第一RF滤波器结构。 第一RF滤波器结构包括RF谐振器的第一无源组和有源损耗减小电路。 有源损耗减小电路耦合到RF谐振器的第一无源组。 有源损耗减小电路使用自限制正反馈来减少RF谐振器的第一无源组中的信号损耗。 此外，有源损耗降低电路限制了自限制正反馈，以防止有源损耗减小电路中的自振荡。

    CALIBRATION FOR A TUNABLE RF FILTER STRUCTURE
    40.
    发明申请
    CALIBRATION FOR A TUNABLE RF FILTER STRUCTURE 有权
    可调式RF滤波器结构的校准

    公开(公告)号：US20150035612A1

    公开(公告)日：2015-02-05

    申请号：US14449764

    申请日：2014-08-01

    Applicant: RF Micro Devices, Inc.

    Inventor： George Maxim ,  Dirk Robert Walter Leipold ,  Baker Scott

    IPC: H04B3/04

    CPC classification number: H03H7/0161 ,  H03F1/565 ,  H03F3/193 ,  H03F3/245 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/267 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2203/7209 ,  H03H7/0153 ,  H03H7/09 ,  H03H7/1775 ,  H03H2210/012 ,  H03H2210/025 ,  H03H2210/04 ,  H03J5/242

    Abstract: Embodiments of radio frequency (RF) front-end circuitry are disclosed where the RF front-end circuitry includes a tunable RF filter structure and a calibration circuit. The tunable RF filter structure includes (at least) a pair of weakly coupled resonators and defines a transfer function with a passband. The calibration circuit is configured to shape the passband so that the passband defines a center frequency. Additionally, the calibration circuit is configured to detect a phase difference at the target center frequency between the pair of weakly coupled resonators and adjust the phase difference of the pair of weakly coupled resonators at the target center frequency so as to reduce a frequency displacement between the center frequency of the passband and the target center frequency. In this manner, the calibration circuit calibrates the tunable RF filter structure to correct for errors in the center frequency of the passband due to component manufacturing variations.

    Abstract translation: 公开射频（RF）前端电路的实施例，其中RF前端电路包括可调RF滤波器结构和校准电路。 可调谐RF滤波器结构包括（至少）一对弱耦合谐振器并且定义具有通带的传递函数。 校准电路被配置成使通带成形，使得通带限定中心频率。 此外，校准电路被配置为检测在一对弱耦合谐振器之间的目标中心频率处的相位差，并且在目标中心频率处调整一对弱耦合谐振器的相位差，以便减小频率位移 通带的中心频率和目标中心频率。 以这种方式，校准电路校准可调谐RF滤波器结构，以校正由于部件制造变化而导致的通带中心频率的误差。

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