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公开(公告)号：US06233442B1
公开(公告)日：2001-05-15
申请号：US09144729
申请日：1998-09-01
申请人： Tsutomu Koda , Akira Mishima , Tetsuya Ozaki , Seiji Matsushita
发明人： Tsutomu Koda , Akira Mishima , Tetsuya Ozaki , Seiji Matsushita
IPC分类号： H04B126
CPC分类号： H03D7/00 , H03D2200/0017 , H03D2200/009 , H04B1/1036
摘要： A high frequency apparatus includes an input terminal 21, a high frequency filter 22 to which a signal input into the input terminal 21 is supplied, a mixer 24, one input of which an output signal of the high frequency filter 22 is supplied to and an other input of which an output signal of a local oscillator 23 is supplied to, an intermediate frequency filter 25 to which an output signal of the mixer 24 is supplied, an output terminal 27 to which an output signal of the intermediate frequency filter 25 is supplied, and an electronic switch 30. The electronic switch is provided in the vicinity of the intermediate frequency filter 25, for making a passband characteristic of the intermediate frequency filter 25 substantially flat by closing both contacts, wherein opening and closing of the electronic switch 30 is controlled externally. Accordingly, the adjusting error of the high frequency filter can be reduced.
摘要翻译： 高频装置包括：输入端子21，输入到输入端子21的信号的高频滤波器22;混频器24，其中输入高频滤波器22的输出信号的一个输入端和 提供本地振荡器23的输出信号的其他输入，提供混频器24的输出信号的中频滤波器25提供中频滤波器25的输出信号的输出端27 和电子开关30.电子开关设置在中频滤波器25附近，用于通过闭合两个触点来使中频滤波器25的通带特性基本平坦，其中电开关30的开和关是 从外部控制。 因此，能够降低高频滤波器的调整误差。
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公开(公告)号：US4661997A
公开(公告)日：1987-04-28
申请号：US779139
申请日：1985-09-23
CPC分类号： H03D9/0641 , H03D2200/0017 , H03D2200/0023 , H03D7/1408 , H03D9/0616 , H03D9/0633
摘要： A novel mixer of good noise performance for operation at microwave frequencies (e.g. the 22 GHz communications band) is disclosed. The mixer comprises a waveguide to which signals and local oscillations are coupled, and from which the intermediate frequency output is derived. The principal circuitry is provided on a metallized substrate set within the waveguide in a "finline" construction. The metallized substrate performs the essential functions of impedance matching the mixer to the source of signal and local oscillations, a bridge for isolating the signal port from local oscillations and for isolating the LO port from the signal, and means to adjust the application of signal and load to the mixer diodes for optimum signal conversion. The noise figure achieved is approximately 4 db at 22 GHz, and represents an improvement over known competitive designs.
摘要翻译： 公开了一种用于在微波频率（例如，22GHz通信频带）下操作的良好噪声性能的新型混频器。 混频器包括波导，信号和本地振荡耦合到该波导，从中导出中频输出。 主要电路以“finline”结构设置在波导管内的金属化衬底上。 金属化基板执行将混频器与信号源和本地振荡源的阻抗匹配的基本功能，用于将信号端口与本地振荡隔离并将LO端口与信号隔离的桥接器，以及用于调整信号和 加载到混频器二极管以实现最佳信号转换。 实现的噪声系数在22 GHz时约为4 dB，相当于已知的竞争设计。
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公开(公告)号：US4406020A
公开(公告)日：1983-09-20
申请号：US288229
申请日：1981-07-29
申请人： John Reindel
发明人： John Reindel
CPC分类号： H03D9/0641 , H03D2200/0017 , H03D7/1408 , H03D9/0616 , H03D9/0633
摘要： A millimeter wave printed circuit mixer is disclosed which has extended RFnd IF bandwidths. A dual ridge waveguide to slotline transition is utilized to bring the RF signal into the device. The waveguide to slotline transition is terminated in first and second shorted RF slotlines formed on the bottom of a dielectric substrate and extending from the RF slotline. A microstrip LO bandpass filter terminating in a microstrip line is formed on the dielectric substrate and is utilized to bring the local oscillator signal to the device. First and second beam lead diodes are connected from the microstrip line through apertures in the dielectric substrate and thence are connected across the dual shorted RF slotlines and connected to the ground plane conductor on the underside of the dielectric substrate. An IF filter is formed on the dielectric substrate and connected to the microstrip line for removing the IF signal from the device. The dielectric substrate and the elements formed on the substrate are enclosed within a waveguide housing.
摘要翻译： 公开了一种具有扩展的RF和IF带宽的毫米波印刷电路混频器。 利用双脊波导到时隙线转换将RF信号带入设备。 波导到槽线转变终止在形成在电介质基底的底部上并从RF槽线延伸的第一和第二短路RF缝隙线中。 终端于微带线的微带线带通滤波器形成在电介质基片上，用于将本地振荡器信号送到器件。 第一和第二光束引线二极管通过介电衬底中的孔从微带线连接，然后跨越双重短路RF缝隙连接并连接到电介质衬底的下侧上的接地平面导体。 在电介质基板上形成中频滤波器，并连接到微带线，以从装置中去除IF信号。 电介质基板和形成在基板上的元件被封装在波导壳体内。
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公开(公告)号：US3943450A
公开(公告)日：1976-03-09
申请号：US498605
申请日：1974-08-19
申请人： Klaus Otremba
发明人： Klaus Otremba
CPC分类号： F16B7/00 , H03D7/02 , H03D9/0641 , H03D2200/0003 , H03D2200/0017 , H03D2200/0023 , H03D7/1408 , H03D9/0633
摘要： A frequency converting or mixing device for a receiver, particularly employing hollow conductor or micro strip techniques, including signal and oscillator input means, a diode as a non-linear element, an intermediate frequency output and two stub circuits at the signal input side of the diode, at a mutual distance of approximately one-fourth signal input wave length, for effecting a blocking of currents, of the second harmonic of the oscillator frequency and the summation frequency of the signal input frequency and oscillator frequency, at the diode.
摘要翻译： 一种用于接收机的变频或混频装置，特别是采用中空导体或微带技术，包括信号和振荡器输入装置，二极管作为非线性元件，中频输出和两个短截线电路在信号输入端 二极管，在大约四分之一信号输入波长的相互距离处，用于在二极管处实现振荡器频率的二次谐波和信号输入频率和振荡器频率的求和频率。
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公开(公告)号：US3659206A
公开(公告)日：1972-04-25
申请号：US3659206D
申请日：1970-07-16
申请人： COLLINS RADIO CO
发明人： HALLFORD BEN R
CPC分类号： H03D9/0633 , H03D7/1408 , H03D2200/0003 , H03D2200/0017
摘要： A balanced microwave mixer for converting a microwave input signal to an intermediate frequency output using a microwave carrier as a local oscillator signal with the two microwave signals combined and divided out through two signal carrier lines via a hybrid ''''rat race'''' circuit ring. The two signal carrier lines are connected respectively one to the anode of a mixer diode and the other to the cathode of another mixer diode the opposite IF side electrodes of which are dc circuit interconnected via IF output circuitry connected thereto. Harmonic suppression filters are employed both at the inputs and outputs of the mixer diodes, and input signal quarter wavelength long outer end grounded stubs are also provided closely adjacent the mixer diodes on the RF signal input sides thereof. Low impedance RF termination stubs are provided at the diode IF outputs with each connected to an IF combining RF reactive onequarter RF signal wavelength long stub through high impedance lines of similar length and, further, a high impedance line of similar length interconnects the IF combining stub to an RF rejection filter in turn connected to an IF amplifier.
摘要翻译： 一种平衡微波混频器，用于将微波输入信号转换成中频输出，使用微波载波作为本地振荡器信号，两个微波信号通过两个信号载波线通过混合“大鼠赛道”电路环组合和分割。 两个信号载体线分别连接到混频器二极管的阳极，另一个连接到另一个混频二极管的阴极，另一个混频二极管的相对的IF侧电极是通过与其连接的IF输出电路互连的直流电路。 在混频器二极管的输入和输出端都采用谐波抑制滤波器，并且输入信号四分之一波长长的外端接地短截线也紧邻其RF信号输入侧的混频二极管。 在二极管IF输出端提供低阻抗射频终端短截线，每个中频输出连接到IF组合RF反应四分之一RF信号波长长短截线，通过类似长度的高阻抗线路进一步连接，此外，高阻抗线路类似长度的互连IF 将短截线结合到RF抑制滤波器，然后连接到IF放大器。
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公开(公告)号：US09054748B2
公开(公告)日：2015-06-09
申请号：US14250195
申请日：2014-04-10
申请人： Aviacomm Inc.
发明人： Shih Hsiung Mo , Yan Cui , Chung-Hsing Chang
CPC分类号： H04B1/0053 , H03D7/165 , H03D2200/0017 , H03D2200/005 , H04L27/38
摘要： One embodiment of the present invention provides a receiver for wireless communication. The receiver includes a demodulator and at least one filtering mechanism coupled to the demodulator, and an analog-to-digital converter (ADC) coupled to the filtering mechanism. The filtering mechanism can be configured to function as a low-pass filter (LPF) or a band-pass filter (BPF), thereby enabling the receiver to function as a direct-conversion receiver or a low-intermediate frequency (low-IF) receiver.
摘要翻译： 本发明的一个实施例提供了一种用于无线通信的接收机。 接收机包括解调器和耦合到解调器的至少一个滤波机构以及耦合到滤波机构的模数转换器（ADC）。 滤波机构可以配置为用作低通滤波器（LPF）或带通滤波器（BPF），从而使接收机能够用作直接转换接收机或低中频（低中频） 接收器。
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7.发明授权
公开(公告)号：US6125271A
公开(公告)日：2000-09-26
申请号：US36258
申请日：1998-03-06
申请人： John R. Rowland, Jr.
发明人： John R. Rowland, Jr.
摘要： A front end circuit for an RF dual band GSM/DCS phone includes a first channel including an elliptical high-pass filter, a first SAW filter, and a low noise amplifier and a second channel including a second SAW filter and a second low noise amplifier. The output of each channel is alternately switchable to a single-side band mixer circuit. This front end circuit arrangement provides significantly reduced cost and part count over other approaches.
摘要翻译： 用于RF双频带GSM / DCS电话的前端电路包括包括椭圆形高通滤波器，第一SAW滤波器和低噪声放大器的第一通道和包括第二SAW滤波器和第二低噪声放大器的第二通道 。 每个通道的输出交替切换到单边带混频器电路。 与其他方法相比，这种前端电路装置显着降低了成本和部件数量。
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公开(公告)号：US5898913A
公开(公告)日：1999-04-27
申请号：US845749
申请日：1997-04-25
CPC分类号： H03D7/1441 , H03D7/1433 , H03D7/1458 , H03D7/1466 , H03D7/1483 , H03D2200/0017 , H03D2200/0043 , H03D7/125
摘要： A frequency converter employs a balanced bridge mixer of switching elements such as field-effect transistors (FETs) with a local oscillator supplying control signals to gate terminals of the transistors. A carrier at intermediate frequency (IF) or at radio frequency (RF) is modulated for communication of data, and is applied to alternate nodes of the bridge. The remaining bridge nodes supply output signals to respective branches of an output circuit. Each branch of the output circuit is provided with a bandpass filter having a spectral characteristic corresponding to the spectral characteristic of a specific one of plural output signals to be outputted via the branch. Each branch may contain an active element, such as an amplifier, which is activated for outputting a signal, and which is deactivated for when node signal is to be outputted. A switchable impedance circuit is included within each of the branches to present a substantially constant impedance characteristic to the bridge, independently of whether the bridge amplifier is activated or deactivated. The local oscillator may provide plural frequencies, as by use of a variable-frequency oscillator or by use of plural oscillators, to place an output signal within the frequency band of a specific one of the output branches.
摘要翻译： 变频器采用诸如场效应晶体管（FET）的开关元件的平衡桥式混频器，其中本地振荡器向晶体管的栅极端子提供控制信号。 中频（IF）或射频（RF）的载波被调制用于数据通信，并被应用于桥的备用节点。 剩余的桥接节点向输出电路的各个分支提供输出信号。 输出电路的每个分支都具有带通滤波器，该带通滤波器具有对应于要通过分支输出的多个输出信号中的特定一个的频谱特性的频谱特性。 每个分支可以包含有源元件，例如放大器，其被激活用于输出信号，并且当节点信号被输出时被去激活。 每个分支中包括可切换阻抗电路，以向桥提供基本上恒定的阻抗特性，而不管桥式放大器是启动还是停用。 本地振荡器可以通过使用可变频率振荡器或通过使用多个振荡器来提供多个频率，以将输出信号放置在特定一个输出分支的频带内。
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公开(公告)号：US4855894A
公开(公告)日：1989-08-08
申请号：US198576
申请日：1988-05-25
申请人： Nobumitsu Asahi , Tetsuo Ikeda , Seiji Kawase
发明人： Nobumitsu Asahi , Tetsuo Ikeda , Seiji Kawase
CPC分类号： H03D7/00 , H03D2200/0017 , H03D2200/005 , H03D2200/0052 , H03D2200/006
摘要： A frequency converting apparatus including a sample circuit and a bandpass filter wherein an input analog signal is sampled at predetermined periods only for predetermined time intervals to produce or increase the harmonic components of the original analog signal, a desired frequency component is extracted through the bandpass filter from the harmonic components to thereby convert the original signal having a particular frequency band to a signal having a higher-frequency band.
摘要翻译： 一种包括采样电路和带通滤波器的频率转换装置，其中输入模拟信号仅在预定时间间隔被采样以产生或增加原始模拟信号的谐波分量，通过带通滤波器提取期望的频率分量 从而将具有特定频带的原始信号转换为具有较高频带的信号。
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公开(公告)号：US4654887A
公开(公告)日：1987-03-31
申请号：US794802
申请日：1985-11-04
CPC分类号： H03D9/0633 , H03B19/18 , H03D2200/0003 , H03D2200/0017 , H03D7/1408
摘要： A wideband enhancement sum mixer is shown to comprise a pair of matched GaAs diodes operative with a printed circuit wherein a portion of at least the sum signal, i.e., the sum of a radio frequency signal and a local oscillator signal, is caused to be mixed with the second harmonic of the local oscillator signal to produce an intermediate frequency signal in phase with the intermediate frequency signal resulting from mixing of the radio frequency signal and the local oscillator signal.
摘要翻译： 宽带增强和混合器被示为包括一对与印刷电路一起工作的匹配的GaAs二极管，其中至少和信号的一部分，即射频信号和本地振荡器信号的和被混合 利用本地振荡器信号的二次谐波产生与由射频信号和本地振荡器信号的混合产生的中频信号同相的中频信号。
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