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1. 发明授权

US5652599A Dual-band antenna system 失效
标题翻译：双频天线系统
公开(公告)号：US5652599A
公开(公告)日：1997-07-29
申请号：US526814
申请日：1995-09-11
申请人： Thomas A. Pitta , Paul E. Peterzell , Richard K. Kornfeld , Ana L. Weiland , Raymond C. Wallace
发明人： Thomas A. Pitta , Paul E. Peterzell , Richard K. Kornfeld , Ana L. Weiland , Raymond C. Wallace
IPC分类号： H01P1/213 , H03H7/46 , H04B1/40 , H01Q1/50
CPC分类号： H04B1/406 , H01P1/213 , H04B1/005 , H04B1/18 , H03H2007/386
摘要： A dual-band antenna system for use in a portable communications device is disclosed herein. The antenna system includes an antenna element for radiating electromagnetic energy within low-band and high-band wavelength ranges. In a preferred embodiment, a low-band isolator network, coupled to the antenna element, provides signal isolation between high-band and low-band signal paths during high-band operation. Similarly, a high-band isolator network provides signal isolation, during operation over the low-band range of wavelengths, between the high-band and low-band signal paths. During transmit and receive operation, low-band and high-band electromagnetic energy directed through the antenna is passed by the low-band and high-band isolator networks, respectively. Also included are low-band and high-band matching networks which couple the low-band and high-band isolator networks to low-band and high-band transceiver circuitry.
摘要翻译：本文公开了一种用于便携式通信设备的双频天线系统。天线系统包括用于在低频带和高频带波长范围内辐射电磁能的天线元件。在优选实施例中，耦合到天线元件的低频带隔离器网络在高频带操作期间在高频带和低频带信号路径之间提供信号隔离。类似地，高带隔离器网络在高频带和低频带信号路径之间的低波段范围内的操作期间提供信号隔离。在发射和接收操作期间，通过天线引导的低频带和高频带电磁能分别由低频带和高频带隔离网络传递。还包括将低频带和高带隔离器网络耦合到低频带和高频带收发器电路的低频带和高频带匹配网络。

2. 发明授权

US5442322A Power amplifier bias control circuit and method 失效
标题翻译：功率放大器偏置控制电路及方法
公开(公告)号：US5442322A
公开(公告)日：1995-08-15
申请号：US315540
申请日：1994-09-30
申请人： Richard K. Kornfeld , Ana L. Weiland , Mitsunari Okazaki
发明人： Richard K. Kornfeld , Ana L. Weiland , Mitsunari Okazaki
IPC分类号： H03F1/02 , H03F1/30 , H03F3/20 , H03G3/30
CPC分类号： H03F1/306 , H03F1/0261
摘要： A control circuit for a multi-stage power amplifier (such as in a portable radio transmitter) compensates for fluctuations in ambient temperature, load, signal level and power supply voltage, The control voltage is set by comparing a biasing level which is related to the amplifier input signal level to a voltage proportional to the power supply current of the last stage of the amplifier. The control voltage resulting from the comparison establishes the operating point of the last stage of the power amplifier.
摘要翻译：用于多级功率放大器（例如在便携式无线电发射机中）的控制电路补偿环境温度，负载，信号电平和电源电压的波动。控制电压通过比较与放大器输入信号电平与放大器最后一级的电源电流成正比。由比较产生的控制电压建立功率放大器最后一级的工作点。

3. 发明授权

US5452473A Reverse link, transmit power correction and limitation in a radiotelephone system 失效
标题翻译：无线电话系统中的反向链路，发射功率校正和限制
公开(公告)号：US5452473A
公开(公告)日：1995-09-19
申请号：US203151
申请日：1994-02-28
申请人： Ana L. Weiland , Richard K. Kornfeld , Richard J. Kerr , John E. Maloney , Nathaniel B. Wilson
发明人： Ana L. Weiland , Richard K. Kornfeld , Richard J. Kerr , John E. Maloney , Nathaniel B. Wilson
IPC分类号： H04B1/40 , H04B1/04 , H04B7/005 , H04B7/26 , H04W52/06 , H04W52/52 , H04B1/06
CPC分类号： H04W52/06 , H04W52/36 , H04W52/52
摘要： The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.
摘要翻译：本发明的方法和装置限制在优选实施例中在蜂窝系统中操作的无线电话机的输出功率。这确保传输的边带和合成器相位噪声保持在一定的规格内。这通过功率检测和校正累加器来实现，即使当与无线电话机通信的小区站点向无线电话机发送功率开启命令时，通过将增益调整限制为最大值来一起生成增益控制信号。该过程包括由于发射机级或增益控制元件中的增益变化而动态校正发射机的输出电平。

4. 发明授权

US5655220A Reverse link, transmit power correction and limitation in a radiotelephone system 失效
标题翻译：无线电话系统中的反向链路，发射功率校正和限制
公开(公告)号：US5655220A
公开(公告)日：1997-08-05
申请号：US532383
申请日：1995-09-22
申请人： Ana L. Weiland , Richard K. Kornfeld , John E. Maloney
发明人： Ana L. Weiland , Richard K. Kornfeld , John E. Maloney
IPC分类号： H04B1/40 , H04B1/04 , H04B7/005 , H04B7/26 , H04W52/06 , H04W52/52 , H04B7/00 , H04Q7/32
CPC分类号： H04W52/06 , H04W52/36 , H04W52/52
摘要： The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.
摘要翻译：本发明的方法和装置限制在优选实施例中在蜂窝系统中操作的无线电话机的输出功率。这确保传输的边带和合成器相位噪声保持在一定的规格内。这通过功率检测和校正累加器来实现，即使当与无线电话机通信的小区站点向无线电话机发送功率开启命令时，通过将增益调整限制为最大值来一起产生增益控制信号。该过程包括由于发射机级或增益控制元件中的增益变化而动态校正发射机的输出电平。

5. 发明授权

US5590408A Reverse link, transmit power correction and limitation in a radiotelephone system 失效
公开(公告)号：US5590408A
公开(公告)日：1996-12-31
申请号：US407543
申请日：1995-03-20
申请人： Ana L. Weiland , Richard K. Kornfeld , John E. Maloney
发明人： Ana L. Weiland , Richard K. Kornfeld , John E. Maloney
IPC分类号： H04B1/40 , H04B1/04 , H04B7/005 , H04B7/26 , H04W52/06 , H04W52/52
CPC分类号： H04W52/06 , H04W52/36 , H04W52/52
摘要： The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.

6. 发明授权

US5339046A Temperature compensated variable gain amplifier 失效
标题翻译：温度补偿可变增益放大器
公开(公告)号：US5339046A
公开(公告)日：1994-08-16
申请号：US72303
申请日：1993-06-03
申请人： Richard K. Kornfeld , Ana L. Weiland , Mitsunari Okazaki
发明人： Richard K. Kornfeld , Ana L. Weiland , Mitsunari Okazaki
IPC分类号： H03G3/20 , H03G1/00 , H03G1/04 , H03G3/30 , H04B1/04 , H03F1/30 , H04B17/00
CPC分类号： H03G1/04 , H03G1/007
摘要： An amplifier for a radio transceiver overcomes the problem of gain being dependent on ambient temperature. Transmission power is matched to strength of a received signal by providing matched dual gate FET amplifier stages in both the transmitter and receiver portions of the transceiver. Changes in gain due to temperature are compensated for by detecting changes in the FET drain current by measuring the source voltage of the amplifier. The FET source voltage is compared to a reference voltage, and the output signal resulting from the comparison is provided as a control signal to one of the FET gates.
摘要翻译：用于无线电收发器的放大器克服了增益取决于环境温度的问题。通过在收发器的发射器和接收器部分中提供匹配的双栅极FET放大器级，发射功率与接收信号的强度相匹配。通过测量放大器的源极电压来检测FET漏极电流的变化来补偿由温度引起的增益变化。将FET源极电压与参考电压进行比较，并将从比较得到的输出信号作为控制信号提供给FET栅极之一。

7. 发明授权

US5930692A Method and apparatus for increasing receiver immunity to interference 失效
标题翻译：增加接收机抗干扰能力的方法和装置
公开(公告)号：US5930692A
公开(公告)日：1999-07-27
申请号：US855724
申请日：1997-05-09
申请人： Paul E. Peterzell , Richard K. Kornfeld , Charles E. Wheatley, III , Ana Weiland
发明人： Paul E. Peterzell , Richard K. Kornfeld , Charles E. Wheatley, III , Ana Weiland
IPC分类号： H04B1/06 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/005 , H04B7/26 , H04B15/00
CPC分类号： H04W52/52 , H03F3/72 , H03G1/0088 , H03G3/3052 , H03G3/3068 , H04B1/109 , H04B1/70755 , H04B1/7097 , H03F2203/7239 , Y02B60/50
摘要： The method and apparatus of the present invention improve the immunity to interference of a radio receiver. The power level of a received signal is detected. If the power level meets or exceeds a predetermined power threshold, the low noise amplifier is by-passed, thus increasing the intercept point of the receiver components.Alternative embodiments include the use of an RF power detector to control the front-end gain as a function of jammer power. In lieu of a switchable RF gain block, several methods of continuous gain control are proposed. Continuous gain control allows the interference suppression and sensitivity of the receiver to be adjusted at lower signal levels than the switchable gain block.
摘要翻译：本发明的方法和装置提高了无线电接收机的抗干扰能力。检测到接收信号的功率电平。如果功率电平满足或超过预定功率阈值，则低噪声放大器被旁路，从而增加了接收器组件的截取点。替代实施例包括使用RF功率检测器来控制作为干扰功率的函数的前端增益。代替可切换的RF增益块，提出了几种连续增益控制方法。连续增益控制允许在比可切换增益块更低的信号电平下调整接收机的干扰抑制和灵敏度。

8. 发明授权

US5722063A Method and apparatus for increasing receiver immunity to interference 失效
公开(公告)号：US5722063A
公开(公告)日：1998-02-24
申请号：US357951
申请日：1994-12-16
申请人： Paul E. Peterzell , Richard K. Kornfeld , Charles E. Wheatley, III , Ana Weiland
发明人： Paul E. Peterzell , Richard K. Kornfeld , Charles E. Wheatley, III , Ana Weiland
IPC分类号： H04B1/06 , H03G1/00 , H03G3/30 , H04B20060101 , H04B1/10 , H04B1/16 , H04B1/18 , H04B1/40 , H04B1/7075 , H04B1/7097 , H04B3/06 , H04B7/005 , H04B7/26 , H04B15/00
CPC分类号： H04W52/52 , H03F3/72 , H03G1/0088 , H03G3/3052 , H03G3/3068 , H04B1/109 , H04B1/70755 , H04B1/7097 , H03F2203/7239 , Y02B60/50
摘要： The method and apparatus of the present invention improve the immunity to interference of a radio receiver. The power level of a received signal is detected. If the power level meets or exceeds a predetermined power threshold, the low noise amplifier is by-passed, thus increasing the intercept point of the receiver components. Alternative embodiments include the use of an RF power detector to control the front-end gain as a function of jammer power. In lieu of a switchable RF gain block, several methods of continuous gain control are proposed. Continuous gain control allows the interference suppression and sensitivity of the receiver to be adjusted at lower signal levels than the switchable gain block.

9. 发明授权

US5737687A Self-attenuating RF transceiver system using antenna and modem interfaces and cable link 失效
标题翻译：自衰减RF收发系统采用天线和调制解调器接口和电缆链路
公开(公告)号：US5737687A
公开(公告)日：1998-04-07
申请号：US398619
申请日：1995-03-01
申请人： Christopher B. Martin , Richard K. Kornfeld , Sherman Gregory
发明人： Christopher B. Martin , Richard K. Kornfeld , Sherman Gregory
IPC分类号： H04B1/06 , H04B1/38 , H04B7/00 , H04B7/005 , H04B3/36
CPC分类号： H04W52/52 , H04B1/3877
摘要： A transceiver system for interfacing digital modems with radio frequency signals including an antenna, an antenna interface system and a modem interface system separated by a cable. The antenna is placed in a location having optimal reception and in close proximity to the antenna interface system. The cable couples the antenna interface system to the modem interface system. The modem interface system includes a two state variable attenuator and an attenuation register that are configured to either reduce the strength of the receive (Rx) signal when the modems are located near a base station, or to transmit the Rx signal without attenuation when the concentrated subscriber unit is at a more distant location. The outgoing, or transmit (Tx), signal is also attenuated in a similar manner to the incoming signal. A signal loss detection system includes a detector located in the modem interface system that receives an oscillating signal transmitted from the antenna interface system through the coaxial cable. A differentiating integrator then determines the amount of signal loss experienced by this oscillating signal during transmission through the coaxial cable and attenuates the signal from the antenna interface system accordingly so the amount of loss experienced remains constant. DC power is transmitted from the modem interface system to the antenna interface system through the coaxial cable. A maximum power limiting system detects when the signal being generated exceeds the capacity of the transmit power amplifier and transmits an alarm signal to the modem interface system.
摘要翻译：用于将数字调制解调器与包括由电缆隔开的天线，天线接口系统和调制解调器接口系统的射频信号进行接口的收发机系统。将天线放置在具有最佳接收并且靠近天线接口系统的位置。电缆将天线接口系统耦合到调制解调器接口系统。调制解调器接口系统包括两个状态可变衰减器和一个衰减寄存器，其被配置为当调制解调器位于基站附近时降低接收（Rx）信号的强度，或者当集中用户单元处于更远的位置。输出或发送（Tx）信号也以与输入信号相似的方式衰减。信号丢失检测系统包括位于调制解调器接口系统中的检测器，其接收通过同轴电缆从天线接口系统发送的振荡信号。然后，微分积分器确定在通过同轴电缆传输期间该振荡信号所经历的信号损耗的量，并相应地衰减来自天线接口系统的信号，因此所经历的损耗量保持恒定。直流电源通过同轴电缆从调制解调器接口系统传输到天线接口系统。最大功率限制系统检测何时产生的信号超过发射功率放大器的容量，并向调制解调器接口系统发送报警信号。

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