公开(公告)号：US07411552B2

公开(公告)日：2008-08-12

申请号：US11506407

申请日：2006-08-17

申请人： Patrick F King ,  Ian J Forster

发明人： Patrick F King ,  Ian J Forster

IPC分类号： H01Q1/38 ,  G08B13/14

CPC分类号： H01Q21/28 ,  B65D5/4233 ,  B65D25/205 ,  B65D33/004 ,  B65D2203/10 ,  G06K19/04 ,  G06K19/0716 ,  G06K19/07749 ,  G06K19/07771 ,  G06K19/07798 ,  G11B23/286 ,  H01Q1/22 ,  H01Q1/24 ,  H01Q1/3241 ,  H01Q5/378 ,  H01Q5/40 ,  H01Q9/04 ,  H01Q9/065 ,  H01Q9/16 ,  H01Q13/106

摘要： A wireless communication device includes an antenna for wireless communication with a remote interrogator. Several embodiments are disclosed to increase the options available to designers of wireless communication devices. In some embodiments, the antenna is a quarter wavelength long with one end of the antenna being grounded to provide desired impedance matching characteristics. The position of the ground plane relative to the antenna is also varied between embodiments. The connection from a wireless communication chip to the antenna is also varied between embodiments to provide alternate structures.

摘要翻译： 无线通信设备包括用于与远程询问器进行无线通信的天线。 公开了若干实施例以增加无线通信设备的设计者可用的选项。 在一些实施例中，天线是四分之一波长长，天线的一端被接地以提供期望的阻抗匹配特性。 接地平面相对于天线的位置也在实施例之间变化。 从无线通信芯片到天线的连接也在实施例之间变化以提供替代结构。

公开(公告)号：US07260372B2

公开(公告)日：2007-08-21

申请号：US11472051

申请日：2006-06-20

申请人： Ian J Forster ,  Adrian N Farr

发明人： Ian J Forster ,  Adrian N Farr

IPC分类号： H04B1/06

CPC分类号： G01S19/36 ,  H03D11/04

摘要： An AM receiver incorporates an antenna, a transistor, a current source, and a power supply. The antenna is connected to a gate electrode of the transistor and through a link to a signal earth. In operation, the antenna receives radiation and generates a corresponding input signal which propagates to the gate electrode. The transistor is operable to process the input signal in two steps, namely to reflectively amplify the input signal to generate a correspondingly reflectively amplified input signal at the gate electrode in a first step, and amplitude demodulate the amplified input signal in a second step. The transistor is operable in a non-linear region of its current/voltage characteristic whereas it simultaneously provides reflective amplification and signal demodulation, namely the two steps occur simultaneously. In contradistinction, conventional demodulators employing gain devices operating non-linearly to provide amplitude demodulation incorporate the devices configured to function as transmission amplifiers.

摘要翻译： AM接收器包括天线，晶体管，电流源和电源。 天线连接到晶体管的栅电极，并通过与信号接地的连接。 在操作中，天线接收辐射并产生传播到栅电极的相应输入信号。 晶体管可操作以两步处理输入信号，即在第一步骤中反射放大输入信号以在栅电极处产生相应的反射放大的输入信号，并在第二步骤中对放大的输入信号进行幅度解调。 晶体管可在其电流/电压特性的非线性区域中操作，同时提供反射放大和信号解调，即两个步骤同时发生。 相反，采用非线性运算的增益器件提供幅度解调的常规解调器结合了被配置为用作发射放大器的器件。

公开(公告)号：US06895226B1

公开(公告)日：2005-05-17

申请号：US10130442

申请日：2000-11-17

申请人： Ian J Forster ,  Adrian N Farr ,  Norman A Howard

发明人： Ian J Forster ,  Adrian N Farr ,  Norman A Howard

IPC分类号： G01S7/03 ,  G06K7/00 ,  G06K19/07 ,  H04B1/40

CPC分类号： G06K19/07758 ,  G01S7/034 ,  G06K7/0008 ,  G06K19/0723

摘要： A multimode transceiver circuit comprises a four port coupler of a type which splits a signal applied to one port between two of the other ports. The split signals are phase shifted by a known amount. A first port of the coupler is for receiving a signal and for outputting a signal therefrom. A controllable oscillator is connected to a second port of the coupler and switchable impedances (Schottky diodes) are connected to the remaining ports. A controller is provided for controlling the operation of the oscillator and the impedances to determine the mode of operation of the circuit. In one mode of operation, the oscillator is inoperative and at least one of the impedances is switched to operate as a non-linear impedance such that the circuit detects amplitude-modulation of the signal applied to the first port. In a further mode of operation, the oscillator is operable and both impedances are switched to operate as non-linear impedance elements such that they operate as a mixer to produce an intermediate frequency signal in dependence on the signal applied to the first port. In yet a further mode of operation, the oscillator is operable, and the impedances are switched such that the oscillator frequency appears at the first port for transmission therefrom.

摘要翻译： 多模收发器电路包括四端口耦合器，其类型是将施加到两个其它端口之间的一个端口的信号分开。 分离信号以已知量相移。 耦合器的第一端口用于接收信号并从其输出信号。 可控振荡器连接到耦合器的第二端口，并且可切换阻抗（肖特基二极管）连接到其余端口。 提供控制器用于控制振荡器的操作和阻抗以确定电路的操作模式。 在一种操作模式中，振荡器不工作，并且至少一个阻抗被切换以作为非线性阻抗工作，使得该电路检测施加到第一端口的信号的幅度调制。 在另一操作模式中，振荡器是可操作的，并且两个阻抗都被切换为非线性阻抗元件，以使得它们作为混频器工作，以根据施加到第一端口的信号产生中频信号。 在另一种操作模式中，振荡器是可操作的，并且阻抗被切换，使得振荡器频率出现在第一端口以便从其传输。

公开(公告)号：US06799027B1

公开(公告)日：2004-09-28

申请号：US09926572

申请日：2002-03-12

申请人： Ian J Forster

发明人： Ian J Forster

IPC分类号： H04B126

CPC分类号： H03F3/608

摘要： An amplifier circuit for amplifying an input signal to generate an amplifier output signal incorporates a cascaded series of reflection amplifiers arranged along a signal path and operative to amplify signals propagating in a forward direction along the signal path. The circuit is operative to counteract signal propagation in a reverse direction along the signal path, thereby hindering spontaneous oscillation from arising within the circuit. Incorporation of reflection amplifiers into the circuit enables it to provide high gain, for example 50 dB, while consuming low currents, for example, tens of microamperes. The circuit is especially suitable for use at intermediate frequencies in radio receivers such as mobile telephones.

摘要翻译： 用于放大输入信号以产生放大器输出信号的放大器电路包括沿着信号路径布置的级联串联的反射放大器，并且可操作以放大沿着信号路径沿正向传播的信号。 该电路用于抵消沿着信号路径的相反方向的信号传播，从而阻碍在电路内产生的自发振荡。 将反射放大器并入电路使得其能够提供高增益，例如50dB，同时消耗低电流，例如几十微安。 该电路特别适用于诸如移动电话的无线电接收机中的中频。