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公开(公告)号：EP0600548B1
公开(公告)日：1998-11-04
申请号：EP93203311.1
申请日：1993-11-26
发明人： Minnis, Brian John
IPC分类号： H03F3/60
CPC分类号： H03F3/601
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公开(公告)号：EP0432851A3
公开(公告)日：1992-07-22
申请号：EP90203241.6
申请日：1990-12-10
摘要： A variable bi-phase modulator circuit for microwave signals comprises a quadrature power divider (1) having signal input and output ports (2 and 3) and two control ports (4 and 5), and comprises two variable resistors each having an input port (11). In accordance with the invention each of the two variable resistors comprises first and second microwave field-effect transistors (F1 and F2) the drains of which are coupled together via an intermediate resistor (R). These resistors can be formed using microwave monolithic integrated circuit technology and can have very good impedance characteristics. The input port (11) of the variable resistor comprises a connection to the intermediate resistor (R) and to the drain of the first transistor (F2). Each transistor is connected with zero dc bias between its source and drain and has a channel resistance which changes with change in gate voltage (VG1, VG2). A shunt stub (L1, L2) is connected to the drain of each transistor (F1, F2) to at least partially compensate at the frequency of operation of the transistor for the source to drain capacitance and for shifts in reference plane due to changes in the gate voltage of each transistor.
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3.发明公开Variable bi-phase modulator circuits and variable resistors 失效变量Zweiphasenmodulatorschaltungen undveränderlicheWiderstände。
公开(公告)号：EP0432851A2
公开(公告)日：1991-06-19
申请号：EP90203241.6
申请日：1990-12-10
摘要： A variable bi-phase modulator circuit for microwave signals comprises a quadrature power divider (1) having signal input and output ports (2 and 3) and two control ports (4 and 5), and comprises two variable resistors each having an input port (11). In accordance with the invention each of the two variable resistors comprises first and second microwave field-effect transistors (F1 and F2) the drains of which are coupled together via an intermediate resistor (R). These resistors can be formed using microwave monolithic integrated circuit technology and can have very good impedance characteristics. The input port (11) of the variable resistor comprises a connection to the intermediate resistor (R) and to the drain of the first transistor (F2). Each transistor is connected with zero dc bias between its source and drain and has a channel resistance which changes with change in gate voltage (VG1, VG2). A shunt stub (L1, L2) is connected to the drain of each transistor (F1, F2) to at least partially compensate at the frequency of operation of the transistor for the source to drain capacitance and for shifts in reference plane due to changes in the gate voltage of each transistor.
摘要翻译： 用于微波信号的可变双相位调制器电路包括具有信号输入和输出端口（2和3）和两个控制端口（4和5）的正交功率分配器（1），并且包括两个可变电阻器，每个可变电阻器具有输入端口 11）。 根据本发明，两个可变电阻器中的每一个包括第一和第二微波场效应晶体管（F1和F2），其漏极经由中间电阻器（R）耦合在一起。 这些电阻可以使用微波单片集成电路技术形成，并且可以具有非常好的阻抗特性。 可变电阻器的输入端口（11）包括到中间电阻器（R）和第一晶体管（F2）的漏极的连接。 每个晶体管在其源极和漏极之间连接零直流偏置，并具有随栅极电压（VG1，VG2）的变化而变化的沟道电阻。 分流短截线（L1，L2）连接到每个晶体管（F1，F2）的漏极，以在晶体管的工作频率至少部分地补偿源极到漏极电容以及由于参考平面中的变化引起的参考平面中的偏移 每个晶体管的栅极电压。
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4.发明公开Compact cascadable microwave amplifier circuits 失效在Kaskade verwendbare kompakteMikrowellenverstärkerschaltung。
公开(公告)号：EP0600548A1
公开(公告)日：1994-06-08
申请号：EP93203311.1
申请日：1993-11-26
发明人： Minnis, Brian John
IPC分类号： H03F3/60
CPC分类号： H03F3/601
摘要： A microwave amplifier circuit has input and output coupling circuits (21 and 22) designed on quite different matching principles to obtain a circuit compactness similar to a reactively-matched amplifier and cascadable electrical characteristics similar to a distributed amplifier. The input coupling circuit (21) is formed as a bandpass filter network (7a, 7b, 7c, 17a, 17b, 9) supporting a travelling wave to which the amplifying device (3) is capactively connected. This input network (21) terminates in a resistor (9) in which the travelling wave is dissipated. The output coupling circuit (22) is a reactively matched circuit (8a, 8b, 18a, 18b) which also has a bandpass characteristic. By making the input network (21) bandpass (instead of low pass) a large amplifying device (3) can be used, without reducing line impedance and gain.
摘要翻译： 微波放大器电路具有以非常不同的匹配原理设计的输入和输出耦合电路（21和22），以获得类似于反应匹配放大器的电路紧凑性和类似于分布式放大器的级联电特性。 输入耦合电路（21）形成为支持放大装置（3）与其成行连接的行波的带通滤波器网络（7a，7b，7c，17a，17b，9）。 该输入网络（21）终止于行波消散的电阻（9）。 输出耦合电路（22）是具有带通特性的反应匹配电路（8a，8b，18a，18b）。 通过使输入网络（21）带通（而不是低通），可以使用大型放大器件（3），而不会降低线路阻抗和增益。
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公开(公告)号：EP0372641A3
公开(公告)日：1991-01-02
申请号：EP89203056.0
申请日：1989-12-01
IPC分类号： G01S7/03
摘要： A CW radar comprises a substantially continously operable transmitter (10) and receiver (16,18,20), signal operating means (12,14) for radiating the transmitter signal and for receiving at least the return signal and a reflected power canceller (RPC) circuit (26, 28 and 30) for cancelling leakage signals in a signal path from the signal operating means to the receiver. The receiver front end comprises quadrature related mixers (18,20) which supply intermediate frequency signals (I₁ and Q₁) to a low frequency control loop (32, 34, 36) which supplies at least a pair of control signals (I c ,Q c ) to a four quadrant vector modulator (28) in the RPC circuit. In order to be able to optimise the cancellation of phase as well as amplitude, the control circuit loop includes means for synthesising control vectors (I₁, -I₁, Q₁ and -Q₁) from the outputs of the quadrature related mixers (18,20). Selecting means selects a pair of quadrature related control vectors from those control vectors synthesised on the basis of minimising leakage in the outputs of the quadrature related mixers (18,20). The selected control vectors (I c ,Q c ) are applied to the four quadrant vector modulator (28) which preferably comprises a pair of analogue driven biphase modulators (56,58 - Figure 4 (not shown)). In an alternative embodiment (Figure 7) the four quadrant vector modulator comprises four voltage controlled attenuators to which respective control vectors (I c , -I c , Q c and -Q c ).
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公开(公告)号：EP0083132B1
公开(公告)日：1990-02-28
申请号：EP82201616.8
申请日：1982-12-17
发明人： Minnis, Brian John
IPC分类号： H01P1/203
CPC分类号： H01P1/20381
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公开(公告)号：EP0432851B1
公开(公告)日：1996-03-13
申请号：EP90203241.6
申请日：1990-12-10
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公开(公告)号：EP0372641A2
公开(公告)日：1990-06-13
申请号：EP89203056.0
申请日：1989-12-01
IPC分类号： G01S7/03
摘要： A CW radar comprises a substantially continously operable transmitter (10) and receiver (16,18,20), signal operating means (12,14) for radiating the transmitter signal and for receiving at least the return signal and a reflected power canceller (RPC) circuit (26, 28 and 30) for cancelling leakage signals in a signal path from the signal operating means to the receiver. The receiver front end comprises quadrature related mixers (18,20) which supply intermediate frequency signals (I₁ and Q₁) to a low frequency control loop (32, 34, 36) which supplies at least a pair of control signals (I c ,Q c ) to a four quadrant vector modulator (28) in the RPC circuit. In order to be able to optimise the cancellation of phase as well as amplitude, the control circuit loop includes means for synthesising control vectors (I₁, -I₁, Q₁ and -Q₁) from the outputs of the quadrature related mixers (18,20). Selecting means selects a pair of quadrature related control vectors from those control vectors synthesised on the basis of minimising leakage in the outputs of the quadrature related mixers (18,20). The selected control vectors (I c ,Q c ) are applied to the four quadrant vector modulator (28) which preferably comprises a pair of analogue driven biphase modulators (56,58 - Figure 4 (not shown)). In an alternative embodiment (Figure 7) the four quadrant vector modulator comprises four voltage controlled attenuators to which respective control vectors (I c , -I c , Q c and -Q c ).
摘要翻译： CW雷达包括基本上可连续操作的发射器（10）和接收器（16,18,20），信号操作装置（12,14），用于发射发射器信号并用于接收至少返回信号和反射功率消除器（RPC ）电路（26,28和30），用于消除从信号操作装置到接收器的信号路径中的泄漏信号。 接收机前端包括正交相关混频器（18,20），它向中频信号（I 1和Q 1）提供至少一对控制信号（Ic，Qc）的低频控制环路（32,34,36） 到RPC电路中的四象限矢量调制器（28）。 为了能够优化相位的消除以及振幅，控制电路环路包括用于从正交相关混频器（18,20）的输出端合成控制矢量（I 1，-I 1，Q 1和-Q 1）的装置， 。 选择装置从在正交相关混合器（18,20）的输出中最小化泄漏的基础上合成的那些控制向量中选择一对正交相关控制向量。 选定的控制矢量（Ic，Qc）被施加到四象限矢量调制器（28），其优选地包括一对模拟驱动的双相调制器（56,58-图4（未示出））。 在另一个实施例中（图7），四象限矢量调制器包括四个电压控制衰减器，各自的控制矢量（Ic，-Ic，Qc和-Qc）被输入到该电压控制衰减器。
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公开(公告)号：EP0083132A2
公开(公告)日：1983-07-06
申请号：EP82201616.8
申请日：1982-12-17
发明人： Minnis, Brian John
IPC分类号： H01P1/203
CPC分类号： H01P1/20381
摘要： The specification describes four classes of microwave bandpass filter formed in triplate stripline with portions of line having a commensurate length equal to a quarter-wavelength at the centre of the stopband, enabling the widths of the pass and stop bands to be specified independently; lumped capacitors (C.) are also used to assist in providing elements with high series capacitance. The four classes together cover a wide range of electrical specifications, and enable wide pass and stop bands and high selectivity to be obtained. Each class corresponds to a bandpass S-plane prototype network configurations (Figures 2, 5, 6 and 7 respectively) derived using exact synthesis procedures from a specification of transmission zero locations. The filters can be manufactured using photolithographic technology to have accurately consistent performance.
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