共查询到20条相似文献,搜索用时 755 毫秒
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设计了一种无人机载雷达的Ku波段有源相控阵天线,分析了有源相控阵天线的系统组成、模块布局和设计思路,实现了高集成、低剖面的有源相控阵天线设计,并可同时实现SAR和GMTI功能。设计了32行线源的宽边纵缝驻波阵形式的波导裂缝阵列天线,通过加脊和分区馈电法扩展了天线的工作带宽。采用FFT反演算法在微波近场暗室中对有源相控阵天线进行了校正补偿。实测结果表明该有源天线可以实现两维-20dB的低副瓣电平,并可在俯仰向实现±60°的相控阵扫描,实测方向图与仿真结果相吻合。本天线具有宽带宽角扫描、低副瓣、低剖面、结构紧凑等优点。 相似文献
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为适应新形势下的雷达探测需求,文中提出开放式有源相控阵天线系统架构。与传统意义上的相控阵天线架构相比,其在系统功能、技术研究范畴以及设计灵活性等方面都有很大扩展,可为未来涉及多学科融合的多功能、模块化、可重构及高集成数字化的相控阵天线设计提供系统级的集成环境。 相似文献
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结构功能一体化相控阵天线高密度集成设计方法 总被引:2,自引:0,他引:2
提出了一种新的结构功能一体化相控阵天线的高密度集成设计方法。采用低温共烧陶瓷(LTCC)技术实现了有源相控阵天线的一体化设计,包括天线阵面、瓦式收发(TR)组件、热控装置、馈电网络的高密度集成。采用ANSYS等软件对天线的系统体系构架、总体性能评估、共形承载天线罩、天线阵面、瓦式TR组件以及系统热设计进行仿真分析并进行实物加工和测试。结果表明,该天线的等效全向辐射功率(EIRP)为23.6 dBw,噪声为3.57 dB,测试值与设计值吻合很好。 相似文献
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在基于相控阵天线体制的合成孔径雷达(SAR)系统中,中央电子设备和相控阵天线的非理想特性,会引入幅相误差,造成SAR信号幅相特性畸变,影响SAR图像等数据产品的质量。本文建立了相控阵体制SAR系统误差的模型,并设计了误差校正方法。研究结果表明:雷达中央电子设备的非理想特性会引入固定的幅频、相频误差;相控阵天线的非理想特性所引入的幅频、相频误差会随着波束指向的变化而变化,该误差主要根源于有源器件在不同频点处的性能差异,并会受到T/R模块移相衰减量的调制;可通过测量或分析计算对相控阵SAR的系统误差进行提取,并在SAR成像处理阶段实施误差补偿。 相似文献
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一种Ka频段“瓦式”有源相控阵天线设计 总被引:1,自引:0,他引:1
《现代电子技术》2017,(7):43-47
在Ka频段,由于单元间距小和集成度高,采用"瓦式"结构集成,有源相控阵天线设计难度大。提出一种Ka频段"瓦式"有源相控阵天线设计方法。采用多功能集成芯片技术实现"瓦式"TR组件的设计,"瓦式"有源相控阵天线的整体架构采用模块化设计。最后设计了一种电控扫描的有源相控天线,采用软件仿真和数值分析设计,加工制造原理样机,测试性能指标,验证了提出方法的可行性。 相似文献
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随着毫米波雷达及通信系统的快速发展,有源相控阵天线日益成为当前研究的热门天线形式。然而,毫米波有源相控阵存在空间紧凑、结构复杂、装配繁琐等问题。本文介绍了一种可应用于毫米波相控阵的板级集成天线,并对其天线阵列、垂直过渡等关键结构的设计进行了讨论。该阵面将天线阵列、收发组件和馈电网络全部集成在一块基板上,具有结构简单易于量产的特点。文末给出了对所设计的有源阵面的暗室测试结果,结果表明该天线在毫米波雷达和通信系统中具有巨大的应用潜力。 相似文献
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马强 《电子技术与软件工程》2022,(15):136-139
本文提出了机载有源相控阵雷达天线测试系统的设计准则以及系统的软硬件组成,解决了测试系统动态构建、快速升级问题,实现了机载有源相控阵雷达天线阵面一体化测试保障。 相似文献
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研究了有源相控阵天线的低成本设计思路和数字技术新方法。首先详细地分析了有源相控阵天线的系统构架和成本组成;然后从系统总体的角度,探讨了低成本数字阵列相控阵天线设计方法;最后提出了采用宽带宽角扫描的可重构设计技术来降低有源相控阵天线的成本。提出的有源相控阵天线低成本设计新方法具有很好的工程实用价值和科学意义。 相似文献
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Reliable and cost-effective packaging of monolithic microwave integrated circuits (MMICs) is an important aspect of the design of phased array systems. At millimeter wavelengths, where small dimensions make machining and assembly a complex matter, the interconnections between the modules housing the MMIC components and the antenna elements are a source of unreliability as well as a potential problem in terms of electromagnetic losses. One solution involves the integration of antenna elements onto the MMIC chips. The paper addresses the issues involved in packaging and housing MMIC chips with integrated antenna elements and presents some insights into the electromagnetic design of such packages 相似文献
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Simons R.N. Dib N.I. Lee R.Q. Katehi L.P.B. 《Antennas and Propagation, IEEE Transactions on》1995,43(9):998-1002
This paper presents the design, fabrication, and numerical modeling of two new uniplanar microstrip-to-coplanar strip (CPS) line transitions and a new variant of the linearly tapered slot antenna (LTSA). This new variant with an integrated uniplanar microstrip-to-coplanar strip line feed is called a V-LTSA. The advantages of these transitions in packaging and monolithic microwave integrated circuits (MMIC) integration are listed. The two transitions and the feed are modeled using finite difference time domain (FDTD) method. The overall agreement between the measured and modeled return-loss and insertion-loss characteristics of two back-to-back transitions is good. The resonance frequencies predicted by the FDTD method are within a few percentage points of the measurements. Furthermore, the V-LTSA with the feed is experimentally shown to have a wide return loss (⩽-10 dB) bandwidth, good radiation patterns, and low cross-polarization. The gain of the V-LTSA is 9 dB at the design frequency of 10 GHz. A proof-of-concept package to house the feed is experimentally evaluated and shown to have negligible effect on the antenna characteristics. This type of antenna readily integrates with MMIC packages in an array having a brick architecture. The V-LTSA has potential applications in phased arrays 相似文献
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Alex Lidow 《电力电子》2005,3(4):23-25
本文以洗衣机的变速运动控制为例,IR公司已开发一个完整的集成设计平台iMOTION,将数字控制,模拟和混合信号IC技术,功率半导体技术及其封装技术结合在一起,主要包括高性能数字IC、高电压模拟IC,创新的功率器件和封装、新型电机,以及革新的机械结构,解决了如何在不增加电机系统成本的前提下实现节能的难题。 相似文献
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Boryssenko A. O. Liao J. Zeng J. Deng S. Joyner V. M. Huang Z. R. 《Microwave Theory and Techniques》2010,58(2):403-410
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Reza Zaker Abdolali Abdipour Ahad Tavakoli 《Analog Integrated Circuits and Signal Processing》2014,80(3):507-517
In this paper, a new modified combination of antenna and array feed network integrated in low thickness microstrip technology is presented. A concept similar to the concept of coherently radiating periodic structures is used to feed a 4-element antenna array. In the feed network, a new combination of Gysel-based 3 and 5 port components as power dividers/combiners is employed to propagate the power into the antenna array so that the desired Gaussian-like amplitudes and linear phase distributions can be obtained. These multi-port components are modified to design the feed network by single-layer microstrip technology without the matching and isolation circuits and through-substrate vias. Therefore, the manufacturing cost and difficulty and design complexity are reduced, considerably. Full-wave simulations of the feed network, unit cells and the final integrated antenna array are done, step by step and the results considering all possible losses are presented. To validate the designs, two prototypes, first the feed network and second the integrated module including both antenna array and feed network designed at 3.5 GHz were fabricated and measured and the S parameters (amplitude and phase) were compared with the full-wave simulations. A good agreement between the results including impedance and radiation characteristics is shown. 相似文献
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Guang-Jong Chou Ching-Kuang C. Tzuang 《Antennas and Propagation, IEEE Transactions on》1996,44(8):1078-1085
A new quasi-planar leaky-wave antenna is presented. It consists of microstrip line on one side of the substrate and uniplanar circuit on the other side placed in a partially opened waveguide. The leakage is produced by the excitation of the first higher order (odd) microstrip mode coupled electromagnetically through a slotline on the opposite side of the substrate. Theoretic results based on rigorous Green's impedance integral equation method show that the new microstrip-slotline-coupled leaky-wave antenna has a broadband tuning range via structure parameters and is insensitive to the microstrip line width variation. Measured relative power absorbed (RPA) results indicate that the useful frequency bandwidth agrees with that predicted by rigorous field theory. The measured antenna radiation patterns also agree very well with the approximate theoretic computations. The theory and experiments show that the proposed leaky-wave antenna can interface to feeding structure easily and directly. The new antenna may become a good candidate for microwave and millimeter-wave integrated antenna design 相似文献
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This paper demonstrates a technique for microstrip patch antenna fabrication using a benzocyclobutene(BCB) dielectric.The most distinctive feature of this method is that the antenna is integrated on a low-resistance silicon wafer,and is fully compatible with the microwave multi-chip module packaging process.Low-permittivity dielectric BCB with excellent thermal and mechanical stability is employed to enhance the performance of the antenna.The as-fabricated antenna is characterized,and the experimental results show that the antenna resonates at 14.9 GHz with a 1.67% impedance bandwidth. 相似文献
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本文从封装角度评估功率电子系统集成的重要性。文中概述了多种功率模块的封装结构形式及其主要研发內容。另外还讨论了模块封装技术的一些新进展以及在功率电子电路系统集成中的地位和作用。 相似文献
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Ee Lee Kin Meng Chan Peter Gardner Terence E. Dodgson 《Antennas and Propagation, IEEE Transactions on》2007,55(2):267-276
A novel contact-less, differential feeding technique suitable for integrated active antenna design is demonstrated. This technique utilizes an odd mode signal to generate fringing fields on either side of a microstrip gap under the antenna. This allows electromagnetic energy to be efficiently coupled from the transmission lines to the radiating antenna. In a balanced integrated antenna amplifier configuration, the proposed non-contact feeding method removes the need for any balun or power combining network. Hence in theory, a compact RF front-end design with lower losses can be realized. This feeding method has been successfully applied to the design of simple passive microstrip patch antennas and active integrated antennas (AIA). Simulated and measured results are also included to validate the proposed feeding concept and antenna designs. The performance of the proposed differential feeding technique on a simple microstrip patch antenna has been systematically studied. The study suggests that the proposed proximity method is broadband in nature, allowing antennas operating at different resonant frequencies to be swapped without the need to change the feed dimensions and without degrading the matching performance 相似文献