The results indicate that the RCS is reduced a lot during a very wide frequency band, while antenna` radiation performance remains. The conclusion is useful for the antenna radar cross section reduction.
结果表明，据此设计的微带贴片天线在较宽频带内实现了RCS的减缩，同时天线的辐射性能保持良好，对天线的隐身有一定的借鉴作用。
To ensure HF radar work reliably in the SW band, many anti-jamming techniques in the time domain, frequency domain, spatial domain and polarization domain are adopted to suppress or cancel different types of interferences.
为保证高频雷达能够在频谱拥挤不堪的电磁环境中可靠地工作，在高频雷达系统中先后采用了时域、频域、空域、极化域等多种技术手段对干扰进行抑制或消除。
Waveforms with discontinuous spectra could evade external interferences in frequency domain for their energy distributed flexibly in interference-free zones of the SW band. This would greatly improve the HF radar anti-jamming ability.
凭借信号能量在频域上分配的灵活性，工作在非连续谱信号体制下的高频雷达能够有效地在频域上避开外界的干扰，这无疑可以大大提高高频雷达的抗干扰能力。
Principle of frequency agility radar to resist narrow-band clutter jamming and to reject sea wave clutter is introduced in this paper.
介绍了频率捷变雷达抗窄带杂波干扰与抑制海浪杂波的原理。
The pit and concavity in wide-band disturbance frequency spectrum is found out with the method by spectrum analysis, and then the radar is controlled to work at optimal or quasi-optimal frequency to realize anti-interference.
该方法通过频谱分析，找出了宽带干扰频谱的凹点和凹区，然后控制雷达以最佳或准最佳的频率工作，达到抗广谱有源干扰的目的。
In order to solve this problem, the new concept of unified design of antennas and circuits in solid state active phased array radar is presented that in some degrees at cost of loss gain in center frequency and non-scan condition, good impedance matching should be achieved in the region of broad band and wide scan angle, so as to decrease the reflection of antennas in side frequency and side scan angle and to improve the characteristic impedance and radiation of phased array antennas.
为了解决这一问题，本文提出固态有源相控阵雷达天线与电路一体化设计的概念和思想，即：在某种认可的程度上，以牺牲中心频率和波束不扫描情况下的雷达增益为代价，换取宽频带和大扫描角范围内相控阵天线与电路良好的阻抗匹配，从而降低相控阵天线在边频和大扫描角处的反射，进而改善相控阵雷达天线的阻抗特性和辐射特性。
So it is greatly beneficial to the exploitaion of radar target's polarization scattering imformation and the improvement of wide-band polarimetric radar's detection performance. In this thesis, with the guidance of InPol theory system, the elementary methods of EM wave's InPol time-frequency analysis are presented, which are extension and evolution of the concept of EM wave's instantaneous polarization and provide powerful theoretical tools for the representation and analysis of time-varying EM wave's InPol properties in time-frequency domain.
本文以瞬态极化理论为基础，对电磁波的瞬态极化概念加以拓展和完善，建立了电磁波瞬态极化时频分析基本方法，为在时频域上刻画和分析时变电磁波的瞬态极化特性提供了理论基础和数学工具；然后以电磁波瞬态极化时频变换为工具，刻画和分析了宽带极化雷达目标散射回波在时频域上的瞬态极化特性，提出了两种目标识别方法，取得了良好的目标识别效果。
With the digitization of SAR signal processing, base-band digital signal generator has substituted for SAW devices, and functioned as a part of the digital linear frequency modulator, which generates various sending signals for the radar.
基带数字信号源是合成孔径雷达系统中的关键设备，开发基带数字信号源对于满足SAR向多分辨率、多模式的发展具有重要的意义。
This thesis selects Linear Frequency Modulation Continuous Wave with high time-bandwidth product in order to achieve high range-precision and high range-resolution, and selects millimeter wave as the operating band in order to acquire good directional beam and to reduce the whole structure of the radar by means of the solid-state technique of millimeter wave LFMCW.
本文选用了大时带积的线性调频连续波作为高精度测距雷达的体制，以利用其高的测距精度和高的距离分辨力；选用了毫米波作为高精度测距雷达的工作波段，在获取好的波束指向性的同时，结合毫米波LFMCW一体化固态技术，使得雷达整机固态化、小型化。
A novel approach is presented on the base of AR model of a radar receiver and the concept of information distance detecting the noise factor by BD value. The BD method evaluate synthetically the performance of receiver by the bias degree of noise power spectrum relative to normal, which overcomes dis-sensitivity to band-width and gain of a receiver frequency characteristic in traditional methods.
基于接收机系统的AR模型和信息距离观点创新地提出了检测噪声系数的BD值方法，该方法通过噪声功率谱偏离正常谱的程度来综合衡量接收机的性能，克服了传统噪声系数检测方法对接收机系统频率特性的带宽和增益不敏感的缺点。
The virtual instrument combined with Ku-Band Microwave Doppler phase detect radar is used for the sea wave height measurement according to the Doppler frequency of the sea wave echo and stores the data.
结合Ku波段多普勒相检雷达，运用虚拟仪器根据海浪回波的多普勒频率来判断海浪变化，测出海浪波高存储数据。
Fast computation of wide-band radar cross section using complex frequency hopping and asymptotic waveform evaluation techniques
应用复跳频和AWE技术快速计算目标宽带RCS
Research on the Influence to Satellite Communication System Performance Caused by the Broad Band and Fast Frequency-hopping Synthesizer; Fast computation of wide-band radar cross section using complex frequency hopping and asymptotic waveform evaluation techniques
宽带快速跳频合成器对卫星通信系统性能影响的研究应用复跳频和AWE技术快速计算目标宽带RCS
At last, the paper discusses the main problems about applying meter-band radar to anti-stealth, such as use of polarimetric information, choosing of optimal frequency, overcoming of meter-band radar's connatural faults, and radar target recognition.
最后，就应用米波雷达反隐身中的极化信息利用、率优选、米波雷达固有缺点克服和目标识别等问题进行了探讨。
The design of the microwave system of a X-band HSR-1128 VTS radar with frequency and polarization diversity techniques is presented in this paper. Thc polarization diversity circuit is analysed. The total VSWR, insert loss, MTBF and measured data are also given.
介绍了X波段HSR－1128港口监视雷达微波系统实现频率分集、极化分集的方案，对极化分集电路进行了分析，并给出了系统的驻波、损耗、MTBF值及有关实测数据。
As a part of radar receiver, the X-band receive front-end mainly complete the function that translate the weak RF signal from the antenna system to the corresponding middle frequency signal, assure proper dynamic range, low noise figure and STC.
此X波段接收前端作为雷达接收机的一部分，主要完成将雷达天馈系统接收到的微弱射频回波信号转变为相对应的中频信号，同时保证一定的动态范围、噪声系数及完成STC控制处理。
For the glint occurring in angular tracking of wide-band millimeter radar, a method for glint suppression is introduced based on frequency agility.
本文针对宽带毫米波雷达角跟踪中的角闪烁问题，研究了一种利用频率捷变技术获取目标回波信号的多个独立样本来抑制角闪烁的方法。
Frequency Diversity to Suppress Glint in Wide-Band MMW Radar
频率分集技术对宽带毫米波雷达目标角闪烁的抑制
Based on Bragg scattering theory and Doppler frequency effect theory, X-band marine radar can be used to measure ocean wave and ocean current.
基于布拉格散射原理和多普勒频移原理，利用X-波段导航雷达可以进行海浪和海流的观测。
A full phase parameter radar beacon has been developed to test full phase parameter, wide band self adaptive, frequency hopping pulse compression radar and shorten radar's developing cycle and save funds.
为缩短雷达的研制周期、节约经费，研制了一种全相参雷达信标，用于对全相参宽频带自适应频率捷变脉冲压缩雷达进行测试。