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1.发明授权
公开(公告)号：US4661790A
公开(公告)日：1987-04-28
申请号：US816672
申请日：1986-01-02
CPC分类号： H01P7/10 , H01P1/2138
摘要： An RF filter (100) includes a ceramic resonator (116) sandwiched between first and second compensating discs (114 and 120) for temperature compensation, low loss mounting and heat sinking of the ceramic resonator (116). Good thermal contact between the ceramic resonator (116) and discs (114 and 120) is produced by a compressive force applied by copper plates (112 and 128) and copper can (124). The resonant frequency of the RF filter is tuned by means of a copper-plated tuning shaft (104) and ceramic tuning slug (118) which are positioned by brass bushing (134) in copper pipe (130 and 132). Input and output signals are coupled to the RF filter via respective probes (122).
摘要翻译： RF滤波器（100）包括夹在第一和第二补偿盘（114和120）之间的陶瓷谐振器（116），用于温度补偿，低损耗安装和陶瓷谐振器（116）的散热。 通过由铜板（112和128）和铜罐（124）施加的压缩力来产生陶瓷谐振器（116）和盘（114和120）之间的良好的热接触。 通过在铜管（130和132）中由黄铜衬套（134）定位的镀铜调谐轴（104）和陶瓷调谐块（118）来调节RF滤波器的谐振频率。 输入和输出信号通过相应的探头（122）耦合到RF滤波器。
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2.发明授权Method to achieve a desired bandwidth at a given frequency in a dielectric resonator filter 失效在介质谐振滤波器中以给定频率实现期望带宽的方法
公开(公告)号：US4593460A
公开(公告)日：1986-06-10
申请号：US567438
申请日：1983-12-30
CPC分类号： H01P1/2084 , Y10T29/49016 , Y10T29/4902
摘要： There is provided a method and a corresponding apparatus for establishing the proper bandwidth at one frequency in a microwave, dielectric resonator waveguide filter.Bandwidth is determined by the product of the resonant center frequency and the interresonator coupling coefficient. The interresonator coupling coefficient has been found to vary depending upon the interresonator spacing as well as the position at which the resonators intercept the electromagnetic field distributed across the waveguide.This method establishes the proper combination of field-intercepting position and interresonator spacing such that the proper bandwidth is established at one frequency.
摘要翻译： 提供了一种用于在微波介质谐振器波导滤波器中以一个频率建立适当带宽的方法和相应装置。 带宽由谐振中心频率和谐振器耦合系数的乘积决定。 已经发现，谐振器耦合系数取决于谐振器间隔横跨波导分布的电磁场的谐振器间隔以及位置。 该方法建立了截获位置和间谐振器间隔的适当组合，使得在一个频率处建立了适当的带宽。
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公开(公告)号：US4618836A
公开(公告)日：1986-10-21
申请号：US685662
申请日：1984-12-24
CPC分类号： H03B5/1876 , H03B2200/0024 , H03B2201/017 , H03B5/1852
摘要： A improved microwave dielectric oscillator module which is provided with a removable temperature compensated dielectric resonator channel element is described. The removable temperature compensated dielectric resonator channel element cooperates with an electrically shielded housing. A substrate is mounted within the housing. Microstrip or stripline conductive patterns deposited on the substrate couple energy from the removable dielectric resonator to the remainder of the oscillator circuitry. The oscillator achieves wideband operation utilizing a GaAs FET transistor as the oscillators active element in conjunction with an intergral trombone-line phase adjuster.
摘要翻译： 描述了一种改进的微波介质振荡器模块，其具有可拆卸的温度补偿介质谐振器通道元件。 可移除温度补偿介质谐振器通道元件与电屏蔽壳体协作。 衬底安装在壳体内。 沉积在衬底上的微带或带状导电图案将可移除介质谐振器的能量耦合到振荡器电路的其余部分。 振荡器使用GaAs FET晶体管作为振荡器有源元件与整体长号线相位调节器结合实现宽带操作。
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公开(公告)号：US4602229A
公开(公告)日：1986-07-22
申请号：US567436
申请日：1983-12-30
CPC分类号： H01P1/20309
摘要： In accordance with the present invention there is provided a bandpass T filter and power splitter for electromagnetic energy. It is composed of a plurality of resonant elements serially arranged to form a plurality of forward multi-pole bandpass filters. At least one resonant element is common to both signal paths. The common resonant element transfers energy from the common path to the independent signal paths to effect a power split. The two signal output paths are isolated from one another by a multi-pole bandpass filter. The resonant elements may be composed of either resonant waveguide cavities or dielectric resonators.
摘要翻译： 根据本发明，提供了一种用于电磁能的带通T滤波器和功率分配器。 它由多个串联的谐振元件组成，以形成多个正向多极带通滤波器。 至少一个谐振元件对于两个信号路径是共同的。 公共谐振元件将能量从公共路径传递到独立的信号路径以实现功率分配。 两个信号输出路径通过多极带通滤波器彼此隔离。 谐振元件可以由谐振波导腔或介质谐振器组成。
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5.发明授权
公开(公告)号：US4568894A
公开(公告)日：1986-02-04
申请号：US567437
申请日：1983-12-30
CPC分类号： H01P1/2084
摘要： A method and corresponding apparatus for maintaining constant bandwidth over a frequency spectrum in a microwave, dielectric resonator waveguide filter. Bandwidth is determined by the product of the resonant center frequency and the interresonator coupling coefficient. To maintain constant bandwidth while changing center frequency, the interresonator coupling coefficient must be chosen such that it varies inversely with changes in center frequency. The interresonator coupling coefficient is a function of the physical dimensions of the waveguide and the dielectric resonators, the dielectric constant and the spatial location of the resonators within the waveguide. Once the physical and spatial parameters have been established, the center frequency of the filter may be adjusted by altering the thickness of the resonators without changing the filter bandwidth.
摘要翻译： 一种用于在微波介质谐振器波导滤波器中的频谱上保持恒定带宽的方法和相应装置。 带宽由谐振中心频率和谐振器耦合系数的乘积决定。 为了在改变中心频率的同时保持恒定的带宽，必须选择谐振器耦合系数，使其与中心频率的变化成反比变化。 谐振器耦合系数是波导和介质谐振器的物理尺寸，谐振器在波导内的介电常数和空间位置的函数。 一旦建立了物理和空间参数，可以通过改变谐振器的厚度而不改变滤波器带宽来调节滤波器的中心频率。
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6.发明授权Method for maintaining constant bandwidth over a frequency spectrum in a dielectric resonator filter 失效用于在介质谐振器滤波器中的频谱上保持恒定带宽的方法
公开(公告)号：US4559490A
公开(公告)日：1985-12-17
申请号：US567433
申请日：1983-12-30
CPC分类号： H01P1/2138 , H01P1/2084
摘要： A method and corresponding apparatus for maintaining constant bandwidth over a frequency spectrum in a microwave, dielectric resonator waveguide filter. Bandwidth is determined by the product of the resonant center frequency and the interresonator coupling coefficient. To maintain constant bandwidth while changing center frequency, the interresonator coupling coefficient must be chosen such that it varies inversely with changes in center frequency. The interresonator coupling coefficient is a function of the physical dimensions of the waveguide and the dielectric resonators, the dielectric constant and the spatial location of the resonators within the waveguide. Once the physical and spatial parameters have been established, the center frequency of the filter may be adjusted by altering the thickness of the resonators without changing the filter bandwidth.
摘要翻译： 一种用于在微波介质谐振器波导滤波器中的频谱上保持恒定带宽的方法和相应装置。 带宽由谐振中心频率和谐振器耦合系数的乘积决定。 为了在改变中心频率的同时保持恒定的带宽，必须选择谐振器耦合系数，使其与中心频率的变化成反比变化。 谐振器耦合系数是波导和介质谐振器的物理尺寸，谐振器在波导内的介电常数和空间位置的函数。 一旦建立了物理和空间参数，可以通过改变谐振器的厚度而不改变滤波器带宽来调节滤波器的中心频率。
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7.发明授权
公开(公告)号：US4542352A
公开(公告)日：1985-09-17
申请号：US505568
申请日：1983-06-17
CPC分类号： H03B9/141 , H03C3/22 , H03B2200/007
摘要： A modulated elongate cavity oscillator with minimized modulation nonlinearities includes a first cavity having dimensions which determine the fundamental resonant frequency of the oscillator, a gain element disposed in said first cavity that provides amplification to sustain oscillation, and a varactor diode disposed in said first cavity for modulating the fundamental frequency. A first waveguide is coupled to the first cavity for absorbing modes higher than the mode of the fundamental frequency which have an electric field maxima concurrent with the longitudinal center line of the first cavity. A second waveguide is coupled to the first cavity for absorbing modes higher than the mode of fundamental frequency which have an electric field minima concurrent with the longitudinal center line of the first cavity, whereby the first and second waveguides provide effective attenuation of higher order modes such that modulation nonlinearities due to the existence of higher order modes are substantially eliminated.
摘要翻译： 具有最小调制非线性的调制细长腔振荡器包括具有确定振荡器的基本共振频率的尺寸的第一空腔，设置在所述第一腔中的增益元件，其提供放大以维持振荡，以及设置在所述第一腔中的变容二极管， 调制基频。 第一波导耦合到第一腔，用于吸收比基频的模式高的模式，其具有与第一腔的纵向中心线同时最大的电场。 第二波导耦合到第一腔，用于吸收高于基频模式的模式，其具有与第一腔的纵向中心线同时最小的电场，由此第一和第二波导提供有效衰减高阶模， 基本上消除了由于高阶模式的存在引起的调制非线性。
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8.发明授权
公开(公告)号：US4857928A
公开(公告)日：1989-08-15
申请号：US149350
申请日：1988-01-28
CPC分类号： H04B14/062 , H03M3/408 , H03M3/424 , H03M3/438
摘要： An improved apparatus and method for a sigma delta converter for bandpass signals is disclosed, suitable for use in mobile radio applications, between the front end and digital signal processing stages, that includes at least one bandpass filter, an n-level quantizer, an n-level digital-to-analog (D/A) converter, and a direct current (DC) feedback network. The sigma delta converter for bandpass signals may be configured in a second order or a fourth order embodiment and achieves analog-to-digital conversion of a signal having a non-zero frequency carrier or suppressed carrier with improved signal-to-noise ratio performance and with minimal quantization error. As a result, the sigma delta conversion occures earlier in a receiver chain and a dynamic range of about 95-98 dB is achieved.
摘要翻译： 公开了一种用于带通信号的Σ-Δ转换器的改进的装置和方法，适用于前端和数字信号处理级之间的移动无线电应用，其包括至少一个带通滤波器，n级量化器，n 级数字模拟（D / A）转换器和直流（DC）反馈网络。 用于带通信号的Σ-Δ转换器可以被配置在二阶或四阶实施例中，并且实现具有改进的信噪比性能的具有非零频率载波或抑制载波的信号的模数转换， 具有最小的量化误差。 结果，在接收器链中发生了Σ-Δ转换，并且实现了约95-98dB的动态范围。
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9.发明授权Method and apparatus for enhancing an operating characteristic of a radio transmitter 失效用于增强无线电发射机的操作特性的方法和装置
公开(公告)号：US5564086A
公开(公告)日：1996-10-08
申请号：US158551
申请日：1993-11-29
IPC分类号： H04B1/04
CPC分类号： H04B1/0458
摘要： In a radio transmitter (100) that includes a power amplifier (104) and an antenna (106), a method for enhancing an operating characteristic of the radio transmitter (100) can be accomplished in the following manner. The power amplifier (104) provides a signal (113) to a variable matching network (111), wherein the signal (113) comprises energy to be radiated by the antenna (106). The variable matching network (111) couples the signal (113) to a sampler (112) that is operably coupled to an output of the variable matching network (111 ) and the antenna (106). The sampler (112) samples a forward component (114) and a reflected component (115) of the signal (113). The radio transmitter (100) processes the sampled forward and reflected components (116, 118) to produce a feedback control signal (120). The feedback control signal (120) is used to adjust the variable matching network (111 ), such that an operating characteristic of the radio transmitter (100) is enhanced.
摘要翻译： 在包括功率放大器（104）和天线（106）的无线电发射机（100）中，可以以下列方式实现增强无线电发射机（100）的工作特性的方法。 功率放大器（104）向可变匹配网络（111）提供信号（113），其中信号（113）包括由天线（106）辐射的能量。 可变匹配网络（111）将信号（113）耦合到可操作地耦合到可变匹配网络（111）和天线（106）的输出的采样器（112）。 采样器（112）对信号（113）的正向分量（114）和反射分量（115）进行采样。 无线电发射机（100）处理采样的正向和反射分量（116,118）以产生反馈控制信号（120）。 反馈控制信号（120）用于调整可变匹配网络（111），使得无线电发射机（100）的工作特性得到增强。
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公开(公告)号：US4811362A
公开(公告)日：1989-03-07
申请号：US62816
申请日：1987-06-15
CPC分类号： H03J5/0281 , H04W52/029 , Y02B60/50
摘要： A low power digital receiver (10) is provided that contemporaneously selects the lowest possible sampling signal frequency (34) (from a plurality of available sampling signals), and received signal level (28) to properly digitize (32) and recover a desired signal. Digitization is performed after the first IF using broadband stages (28, 30, and 32) that are temporarily enabled (44) to rapidly digitize the first IF signal. This, together with the low sampling rate, minimizes the power consumption of the receiver (10) thereby permitting portable and mobile digital receiver embodiments.
摘要翻译： 提供了同时选择最低可能采样信号频率（34）（从多个可用采样信号）和接收信号电平（28）适当数字化（32）并恢复期望信号的低功率数字接收机（10） 。 在第一IF使用临时使能宽带级（28,30和32）（44）以快速数字化第一IF信号之后进行数字化。 这与低采样率一起使接收机（10）的功耗最小化，从而允许便携式和移动数字接收机实施例。
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