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1. 发明授权

US4729129A VSWR protection circuit apparatus 失效
标题翻译： VSWR保护电路设备
公开(公告)号：US4729129A
公开(公告)日：1988-03-01
申请号：US919107
申请日：1986-10-15
申请人： Charles B. Koerner
发明人： Charles B. Koerner
IPC分类号： H03G3/20 , H04B1/04
CPC分类号： H03G3/3042 , H04B2001/0416
摘要： A VSWR protection circuit employs first and second mixers whereby the first mixer receives at one input the transmitted frequency and has a local oscillator coupled to the other input to provide at its output a difference frequency. This difference frequency is applied to the input of the second mixer which also receives at another input a frequency which is the sum of an undesired EMI signal plus a residue signal due to reflection from the transmitter. The second mixer produces difference frequencies according to the output from the first mixer. The output from the second mixer is applied to a narrow bandpass filter which essentially allows the transmitted frequency to propagate. The output from the narrow band filter is then detected whereby a DC control voltage is provided and used as a gain control for the transmitting amplifier and essentially is independent of most interfering frequencies.
摘要翻译： VSWR保护电路采用第一和第二混频器，由此第一混频器在一个输入端接收发射频率，并具有耦合到另一输入的本地振荡器，以在其输出端提供差频。该差分频率被施加到第二混频器的输入端，该第二混频器还在另一输入端接收由于来自发射机的反射而导致的不期望的EMI信号加残留信号之和的频率。第二混频器根据第一混频器的输出产生差分频率。来自第二混频器的输出被施加到基本上允许传输频率传播的窄带通滤波器。然后检测来自窄带滤波器的输出，由此提供DC控制电压并将其用作发射放大器的增益控制，并且基本上与大多数干扰频率无关。

2. 发明授权

US4811425A Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers 失效
标题翻译：用于减少在零中频接收机中使用的混频器中本地振荡器泄漏的影响的装置
公开(公告)号：US4811425A
公开(公告)日：1989-03-07
申请号：US1712
申请日：1987-01-09
申请人： Irwin Feerst
发明人： Irwin Feerst
IPC分类号： H03B1/04 , H03D7/16 , H04B15/06 , H04B1/10
CPC分类号： H03D7/165 , H04B15/06 , H03B2202/08 , H03B2202/088 , H03D7/163
摘要： Apparatus for reducing the effects of mixer leakage in a zero IF transmission system includes first and second mixers having relatively equal leakage amounts from an oscillator port to an input port, with the input port of said first mixer adapted to receive a zero IF receiver input signal and with the output port of said first mixer capacitively coupled to the input port of the second mixer. The oscillator ports of the first and second mixers are coupled to a local oscillator output, with the output ports of said first and second mixers coupled respectively to an adder and subtractor circuit to provide respectively a DC signal indicative of the leakage and an output signal indicative of the magnitude of said input signal as effected by leakage to thereby enable the determination of said input signal after mixing.
摘要翻译：用于减少零中频传输系统中的混频器泄漏的影响的装置包括具有从振荡器端口到输入端口的相对泄漏量的第一和第二混频器，所述第一混频器的输入端口适于接收零中频接收器输入信号并且所述第一混频器的输出端口电容耦合到第二混频器的输入端口。第一和第二混频器的振荡器端口耦合到本地振荡器输出，所述第一和第二混频器的输出端口分别耦合到加法器和减法器电路，以分别提供指示泄漏的DC信号和指示的输出信号所述输入信号的大小由泄漏实现，从而能够在混合之后确定所述输入信号。

3. 发明授权

US4795361A Clamping apparatus for coupling waveguides to one another 失效
标题翻译：用于将波导彼此耦合的夹持装置
公开(公告)号：US4795361A
公开(公告)日：1989-01-03
申请号：US39398
申请日：1987-04-17
申请人： Norbert T. Trojanowski
发明人： Norbert T. Trojanowski
IPC分类号： H01P1/04 , H01R13/62
CPC分类号： H01P1/042 , Y10S439/92
摘要： There is disclosed a clamping device which comprises a U-shaped spring secured to a spring retainer in a pivotable manner. The spring retainer is a sub-assembly which consists of two plates forming a slot when sandwiched together to accommodate the spring. The two plates associated with the retainer assembly accommodate a rotatable bolt or screw which screw is directed into a compression stop assembly. A bracket is mounted to the appropriate waveguide flange. This bracket contains an aperture to accommodate a projecting end of the spring. The mating waveguide flanges are clamped in place by adjusting the captive screw which serves to deflect the U-spring completing the clamping action. The unit, as described in the specification, contains two U-shaped springs both of which are coupled to a central spring retaining unit and can operate to connect or disconnect two separate waveguide sections.
摘要翻译：公开了一种夹紧装置，其包括以可枢转的方式固定到弹簧保持器的U形弹簧。弹簧保持器是一个子组件，其由两个板组成，当夹在一起以容纳弹簧时形成槽。与保持器组件相关联的两个板容纳可旋转的螺栓或螺钉，该螺钉或螺钉被引导到压缩止动组件中。支架安装在适当的波导法兰上。该支架包含一个可容纳弹簧突出端的孔。配合的波导法兰通过调节用于使U形弹簧偏转完成夹紧动作的固定螺钉而夹紧就位。如说明书中所述，该单元包含两个U形弹簧，两个U形弹簧都联接到中心弹簧保持单元并且可以操作以连接或断开两个分离的波导部分。

4. 发明授权

US4782299A Methods of arc and corona monitoring for high voltage generators 失效
标题翻译：高压发电机电弧和电晕监测方法
公开(公告)号：US4782299A
公开(公告)日：1988-11-01
申请号：US23363
申请日：1987-03-09
申请人： Michael A. Argentieri
发明人： Michael A. Argentieri
IPC分类号： G01R31/12
CPC分类号： G01R31/1218
摘要： There is disclosed a method for determining the location of an arc or corona as occurring in a high voltage power supply. The technique utilizes sheets of sensitive photographic film which are placed between printed circuit boards of the supply or between high voltage components and the metallic chassis walls of the power supply. During supply operation if an arc or corona occurs the film becomes exposed. The amount of exposure is determinative of the magnitude of the arc as well as indicative of the location of the arc or corona discharge which location and magnitude is determined by developing the film after supply operation. In this manner a comparative analysis of the amount of corona or arc as a function of time can be made by comparing the film density after photographic chemical development. The technique enables one to, therefore, accurately determine not only the magnitude of the arc or corona discharge but the exact location of the same.
摘要翻译：公开了一种用于确定在高压电源中发生的电弧或电晕的位置的方法。该技术使用放置在电源的印刷电路板之间或高压部件和电源的金属底盘壁之间的敏感摄影胶片。在供电操作期间，如果发生电弧或电晕，则电影曝光。曝光量决定了电弧的大小以及电弧或电晕放电的位置，该位置和幅度是通过在供电操作之后开发薄膜来确定的。以这种方式，可以通过比较摄影化学显影后的膜密度来进行电晕或弧的量作为时间的函数的比较分析。因此，该技术不仅可以精确地确定电弧或电晕放电的大小，而且精确地确定其位置。

5. 发明授权

US4736390A Zero IF radio receiver apparatus 失效
标题翻译：零IF无线电接收设备
公开(公告)号：US4736390A
公开(公告)日：1988-04-05
申请号：US919106
申请日：1986-10-15
申请人： Charles R. Ward , Ning H. Lu
发明人： Charles R. Ward , Ning H. Lu
IPC分类号： H03D1/22 , H04B1/30 , H03K9/02
CPC分类号： H03D1/22 , H04B1/30
摘要： There is described a zero IF receiver which affords to reduce offsets normally associated with quadrature mixers employed in such receivers. In order to reduce the effect of such offsets the local oscillator signal is modulated with a balanced pseudo-random phase code signal. This signal is then stripped off by means of additional mixers, one for each of the quadrature channels. The effect of the pseudo-random phase code signal is to spread the spectrum which is associated with the offsets so that the receiver can now respond to desired signals with a minimum of interference.
摘要翻译：描述了一种零IF接收机，其提供通常与在这样的接收机中使用的正交混频器相关联的偏移。为了减少这种偏移的影响，本地振荡器信号用平衡伪随机相位码信号进行调制。然后通过附加的混频器剥离该信号，每个正交通道一个。伪随机相位码信号的效果是扩展与偏移相关联的频谱，使得接收机现在可以以最小的干扰来响应期望的信号。

6. 发明授权

US4731156A Plasma processes for surface modification of fluoropolymers using ammonia 失效
标题翻译：使用氨表面改性含氟聚合物的等离子体工艺
公开(公告)号：US4731156A
公开(公告)日：1988-03-15
申请号：US018666
申请日：1987-02-25
申请人： Francis H. Montmarquet
发明人： Francis H. Montmarquet
IPC分类号： B05D3/04 , B05D3/14 , H05K3/18 , H05K3/38 , H05K3/42 , B44C1/22 , B29C37/00 , C03C15/00 , C03C25/06
CPC分类号： B05D3/144 , B05D3/0446 , H05K3/381 , H05K2201/015 , H05K2203/095 , H05K3/181 , H05K3/422
摘要： There is disclosed a method of raising the surface energy of a fluoropolymer to enable one to wet the surface thereby allowing adhesion of various materials to the surface. The method involves placing the fluoropolymer in a sealed chamber while introducing a combination of oxygen and ammonia gas into the chamber at a predetermined pressure range and at a selected rate. A plasma is created in the chamber during the introduction of the gases for an interval sufficient to remove a substantial amount of fluorine from the surface of said fluoropolymer thereby raising the surface energy of the same.
摘要翻译：公开了一种提高含氟聚合物的表面能的方法，以使得能够润湿表面，从而允许各种材料粘附到表面。该方法包括将氟聚合物置于密封室中，同时以预定的压力范围和选定的速率将氧气和氨气的组合引入室中。在引入气体期间在室中产生等离子体，间隔足以从所述含氟聚合物的表面除去大量的氟，从而提高其表面能。

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