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    • 2. 发明授权
    • High frequency module
    • 高频模块
    • US07580727B2
    • 2009-08-25
    • US10523429
    • 2003-07-22
    • Kevin R. BoyleAntonius J. M. De GraauwRobert F. Milsom
    • Kevin R. BoyleAntonius J. M. De GraauwRobert F. Milsom
    • H04M1/00
    • H04B1/005H04B1/0057H04B1/40H04B1/406H04B1/48
    • A multi-mode radio module (22) comprises a terminal (11) for connection to an antenna (10). A transmitting branch (DCS/PCS) and a branching circuit are coupled to the terminal (11). The branching circuit comprises at least a first and a second branch for receiving signals in first and second frequency bands (DCS, PCS), respectively. Each of the first and second branches comprise, respectively, a phase shifting circuit (PS1, PS2), a BAW or SAW band pass filter (RXF2, RXF3) coupled to the phase shifting circuit, the bandwidth of the filter being selected to pass a wanted signal in one of the first and second frequency bands but reject an unwanted signal in the other of the second and first frequency bands, and a low noise amplifier (LNA2, LNA3) coupled to an output of the band pass filter. The response of each of the band pass filters (RXF2, RXF3) is phase shifted to present an open circuit at the wanted frequency in the other branch. Each of the phase shifting circuits (PS1, PS2) is impedance transforming so that higher impedance filters can be used.
    • 多模式无线电模块(22)包括用于连接到天线(10)的终端(11)。 发送分支(DCS / PCS)和分支电路耦合到终端(11)。 分支电路至少包括用于分别在第一和第二频带(DCS,PCS)中接收信号的第一和第二分支。 第一和第二分支中的每一个分别包括耦合到移相电路的移相电路(PS1,PS2),BAW或SAW带通滤波器(RXF2,RXF3),滤波器的带宽被选择为通过 在第一和第二频带中的一个频带中的有用信号,但是抑制第二和第一频带中的另一个频带中的不需要的信号,以及耦合到带通滤波器的输出的低噪声放大器(LNA2,LNA3)。 每个带通滤波器(RXF2,RXF3)的响应被相移以在另一分支中以所需频率呈现开路。 每个移相电路(PS1,PS2)是阻抗变换,因此可以使用更高阻抗的滤波器。
    • 5. 发明授权
    • Arrangement of MEMS devices having series coupled capacitors
    • 具有串联耦合电容器的MEMS器件的布置
    • US08194386B2
    • 2012-06-05
    • US12158668
    • 2006-12-18
    • Peter G. SteenekenKevin R. BoyleAntonius J. M. De GraauwTheodoor G. S. M. RijksJozef T. M. Van Beek
    • Peter G. SteenekenKevin R. BoyleAntonius J. M. De GraauwTheodoor G. S. M. RijksJozef T. M. Van Beek
    • H01G5/00
    • H01G5/38
    • A tuneable capacitor arrangement for RF use has two series coupled MEMS variable capacitors (C1,C2;C4,C5,C6,C7), varied according to a control signal. The series coupling enables the capacitor to withstand a higher voltage since this is shared by the individual capacitors in a series coupled arrangement. An increase in size of electrodes for each capacitor is compensated by a reduction in size of the springs supporting movable electrodes. These springs can have a larger stiffness value since the capacitance is larger. This means shorter springs, which can also result in a reduction in problems of stiction, resistance, and slow switching. The capacitances have a fixed and a movable electrode, with the RF signal coupled to the fixed electrode to avoid the springs needing to carry an RF signal. This can reduce the problems of inductance and resistance in the springs.
    • 用于RF使用的可调谐电容器布置具有根据控制信号而变化的两个串联耦合的MEMS可变电容器(C1,C2; C4,C5,C6,C7)。 串联耦合使得电容器能够承受更高的电压,因为这是由串联耦合布置的各个电容器共享的。 通过减少支撑可动电极的弹簧的尺寸来补偿每个电容器的电极尺寸的增加。 这些弹簧可以具有较大的刚度值,因为电容较大。 这意味着较短的弹簧,这也可能导致静电,电阻和慢速切换的问题的减少。 电容具有固定和可移动电极,RF信号耦合到固定电极以避免弹簧需要携带RF信号。 这可以减少弹簧中电感和电阻的问题。