The aim of this paper is to achieve the radio frequency stealth(RFS) during the course of tracking by controlling the radiation energy and the interval of a radar. Firstly, we build the model of probability of interce...The aim of this paper is to achieve the radio frequency stealth(RFS) during the course of tracking by controlling the radiation energy and the interval of a radar. Firstly, we build the model of probability of interception with the once radiation during the course of tracking. Secondly, we establish the model of the cumulative probability of interception to describe the effect of RFS throughout the tracking process and obtain two solutions that are minimizing the probability of interception and the radiation times to reduce the cumulative probability of interception. Thirdly, we propose a self-adapting radiation energy control method(SARE)to minimize the probability of interception. Fourthly, we propose a self-adapting radiation interval control method(SARI) to minimize radiation times. Fifthly, combining SARE with SARI, we propose a SARE-SARI control method(SAEI) during the course of tracking.Finally, we compare SAEI with two others by simulation, and the results show the effect of RFS of SAEI is better than the other two,but we have to make a trade-off between the ability of RFS and the effect of tracking.展开更多
Radar target probing and measurement are challenging tasks for Radio Frequency Simulation（RFS） with pulse radar signal. Due to the long-time duration of pulse radar signal and the limited space of anechoic chamber, ...Radar target probing and measurement are challenging tasks for Radio Frequency Simulation（RFS） with pulse radar signal. Due to the long-time duration of pulse radar signal and the limited space of anechoic chamber, the reflected signal returns before pulse radar signal is fully transmitted in RFS. As a consequence, the transmitted and reflected signals are coupled at the receiver. To handle this problem, the Interrupted Transmitting and Receiving（ITR） experiment system is constructed in this paper by dividing the pulse radar signal into sub-pulses. The target echo can be obtained by transmitting and receiving the sub-pulses intermittently. Furthermore, the principles of ITR are discussed and the target probing experiments are performed with the ITR system. It is demonstrated that the ITR system can overcome the coupling between the reflected and transmitted signals. Based on the target probing results, the performance of pulse radar target probing and measurement can be verified in RFS with the ITR system.展开更多
安弗施无线射频系统（RFS）日前宣布推出支持6 GHz频段的SC3/SCX3系列Compact Line EASY微波天线。RFS的SC3/SCX3天线可以帮助客户节省微波回程所需的总体运营成本（OPEX）以及资本开支（CAPEX）。这款天线的设计具有轻便、紧凑、便于...安弗施无线射频系统（RFS）日前宣布推出支持6 GHz频段的SC3/SCX3系列Compact Line EASY微波天线。RFS的SC3/SCX3天线可以帮助客户节省微波回程所需的总体运营成本（OPEX）以及资本开支（CAPEX）。这款天线的设计具有轻便、紧凑、便于安装等特点,并且具备高性能,比市场上的同类产品的重量轻20％。展开更多
在2001年10月份举行中国国际通信设备技术展上，无线技术先驱RFS(RADIO FREQUENCY SYSTEMS)公司推出了一整套专门为中国市场量身定做的射频技术。RFS公司是一家全球性的天线、电缆系统及射频部件的设计商及制造商，对无线通信的基础设...在2001年10月份举行中国国际通信设备技术展上，无线技术先驱RFS(RADIO FREQUENCY SYSTEMS)公司推出了一整套专门为中国市场量身定做的射频技术。RFS公司是一家全球性的天线、电缆系统及射频部件的设计商及制造商，对无线通信的基础设施提供全面的解决方案。RFS为广播、蜂窝站、陆地移动以及微波系统的运营商、系统设备制造商(OEM)、代理商以及系统集成商提供全方位的服务。展开更多
基金supported by the National Natural Science Foundation of China(61472441)
文摘The aim of this paper is to achieve the radio frequency stealth(RFS) during the course of tracking by controlling the radiation energy and the interval of a radar. Firstly, we build the model of probability of interception with the once radiation during the course of tracking. Secondly, we establish the model of the cumulative probability of interception to describe the effect of RFS throughout the tracking process and obtain two solutions that are minimizing the probability of interception and the radiation times to reduce the cumulative probability of interception. Thirdly, we propose a self-adapting radiation energy control method(SARE)to minimize the probability of interception. Fourthly, we propose a self-adapting radiation interval control method(SARI) to minimize radiation times. Fifthly, combining SARE with SARI, we propose a SARE-SARI control method(SAEI) during the course of tracking.Finally, we compare SAEI with two others by simulation, and the results show the effect of RFS of SAEI is better than the other two,but we have to make a trade-off between the ability of RFS and the effect of tracking.
基金supported in part by the National Natural Science Foundation of China(Nos.61101180,61401491 and 61490692)
文摘Radar target probing and measurement are challenging tasks for Radio Frequency Simulation（RFS） with pulse radar signal. Due to the long-time duration of pulse radar signal and the limited space of anechoic chamber, the reflected signal returns before pulse radar signal is fully transmitted in RFS. As a consequence, the transmitted and reflected signals are coupled at the receiver. To handle this problem, the Interrupted Transmitting and Receiving（ITR） experiment system is constructed in this paper by dividing the pulse radar signal into sub-pulses. The target echo can be obtained by transmitting and receiving the sub-pulses intermittently. Furthermore, the principles of ITR are discussed and the target probing experiments are performed with the ITR system. It is demonstrated that the ITR system can overcome the coupling between the reflected and transmitted signals. Based on the target probing results, the performance of pulse radar target probing and measurement can be verified in RFS with the ITR system.
文摘安弗施无线射频系统（RFS）日前宣布推出支持6 GHz频段的SC3/SCX3系列Compact Line EASY微波天线。RFS的SC3/SCX3天线可以帮助客户节省微波回程所需的总体运营成本（OPEX）以及资本开支（CAPEX）。这款天线的设计具有轻便、紧凑、便于安装等特点,并且具备高性能,比市场上的同类产品的重量轻20％。
文摘在2001年10月份举行中国国际通信设备技术展上，无线技术先驱RFS(RADIO FREQUENCY SYSTEMS)公司推出了一整套专门为中国市场量身定做的射频技术。RFS公司是一家全球性的天线、电缆系统及射频部件的设计商及制造商，对无线通信的基础设施提供全面的解决方案。RFS为广播、蜂窝站、陆地移动以及微波系统的运营商、系统设备制造商(OEM)、代理商以及系统集成商提供全方位的服务。
