专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式