Science and Technology on Space Microwave Laboratory

Fengcheng, China

Science and Technology on Space Microwave Laboratory

Fengcheng, China
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Zheng J.,Xidian University | Zheng J.,Science and Technology on Space Microwave Laboratory
2013 IEEE/CIC International Conference on Communications in China, ICCC 2013 | Year: 2013

In this paper, we propose to decompose the received signal into its projection on the channel vector and the corresponding perpendicular in the spatial modulation (SM) detection. Based on this decomposition, the optimal joint antenna and symbol detection can be done separately with reduced complexity and no performance loss. Moreover, the constellation symmetry and a lower bound approximation are employed in the antenna detection to reduce its complexity further. Simulation results are provided to demonstrate the performance of the proposed detectors. © 2013 IEEE.


Wang J.,Zhejiang University | Zhu Z.,Science and Technology on Space Microwave Laboratory | Li C.,Texas Tech University | Huangfu J.,Zhejiang University | Ran L.,Zhejiang University
IEEE Transactions on Circuits and Systems II: Express Briefs | Year: 2013

In this brief, we present for the first time a wireless through-the-obstacle use of a traditional potentiometer. The importance of phase-locked-loop (PLL)-based self-adaptive resonance tuning for a wireless potentiometer is emphasized. The wireless potentiometer integrates near-field communication and wireless power transfer. In order to maintain an optimal operation when severe system detuning occurs, self-adaptive resonance tuning is employed using a wideband quadrature PLL. An experimental example is demonstrated, implying a wide range of through-the-obstacle applications. © 2004-2012 IEEE.


Zhao Z.,Zhejiang University | Hu T.,Science and Technology on Space Microwave Laboratory | Cui W.,Science and Technology on Space Microwave Laboratory | Huangfu J.,Zhejiang University | And 2 more authors.
IEEE Transactions on Geoscience and Remote Sensing | Year: 2014

Plenty of evidence has implied that animals like pigeons and sea turtles utilize geomagnetic information for long-distance migration and homing. In this paper, we conduct an ab initio investigation to imitate a migratory animal's geomagnetic homing across a long distance over the surface of the Earth. Based on a simple assumption that such animals have a natural ability to sense and compare the included angle between the vector geomagnetic field (GF) and a specific geographic direction such as the due north, we show that a long-distance geomagnetic navigation (GN) can be accomplished without any assistance of prestored geomagnetic and geographic information, as long as the navigation is inside a vast area where such a spatial angle can uniquely determine a geographic location. Without any requirement of measuring the strength of the GF, this GN will not be visibly affected by the recurrent fluctuation of the GF that severely hampers traditional GN. By introducing the extended-Kalman-filter algorithm, it is able to find a shortcut in the geomagnetic space, overcoming interferences of strong Gaussian and local-area geomagnetic anomaly. We believe that the proposed approach will find a wide range of potential applications in global, local, and indoor navigations based on magnetic field in the future. © 1980-2012 IEEE.


Wang X.,University of Electronic Science and Technology of China | Tan Q.,Science and Technology on Space Microwave Laboratory | Huang Z.,University of Electronic Science and Technology of China | Tang Z.,University of Electronic Science and Technology of China
Optics Communications | Year: 2014

Wide range and fine steering precision are two conflicting requirements for a given scheme of liquid crystal laser deflector that is used in an acquisition tracking pointing (ATP) system for space laser communication. We report a modified liquid crystal device that has a fine steering precision and also does not affect the steering range as usual. The vernier optically phased array (V-OPA), the device we suggest, integrates a programmable phased wedge on an optical phased array. It provides the feature of a cascade system with two liquid crystal devices of a phased array and a phased wedge. Importantly, it has only one device net loss. After the theoretical analysis on this novel design, our experiments represent the relevant results showing that the device we designed has a precision of better than 2 μrad. © 2013 Elsevier B.V.


Jun X.,University of Electronic Science and Technology of China | Jun X.,Science and Technology on Space Microwave Laboratory | Tu X.,University of Electronic Science and Technology of China | Meng Z.,University of Electronic Science and Technology of China | Tan Q.,Science and Technology on Space Microwave Laboratory
WIT Transactions on Information and Communication Technologies | Year: 2014

Fibre channel (FC) was used in Storage Area Network and avionics system. Its application in aerospace is interesting today. The fault tolerance test is required in developing equipment for aerospace and aviation. The error injection module was developed for FC tester. It is expensive and lack flexibility. The error injection card is designed based on Xilinx V5 FPGA and using modular design. It is cheaper and easy to add new function.The test shows that the goal is achieved. © 2014 WIT Press.


Wang Y.,Science and Technology on Space Microwave Laboratory | Fu Y.,China Academy of Space Technology
2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings | Year: 2011

This paper presents a K band 3dB broadband waveguide power splitter/combiner analyzing and designing steps. In order to achieve broadband performance and at the same time to minimize the difficulty and sensitivity in the mechanical fabrication, the design uses three equal branches, simulated bandwidth is about 3.5GHz which over desirable requirement in operating frequency bands. There are good agreements between the experimental results and simulations. Measured results for this waveguide power splitter/combiner shows return loss greater than 20dB, isolation of through port and coupler port is greater than 24dB, isolation of input port and isolated port is greater than 22dB, and VSWR of each port is below 1.2. © 2011 IEEE.


Dong S.-W.,Science and Technology on Space Microwave Laboratory | Zhu Z.-B.,Science and Technology on Space Microwave Laboratory | Wang Y.,Science and Technology on Space Microwave Laboratory
2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings | Year: 2011

Remarkable progress has been made of terahertz technologies such as the source and detector. Great advancement has also been achieved of terahertz systems. Such progress reviewed here presents a big impetus to terahertz satellite communications. For satellite-to-satellite communications terahertz link shows great advantages over either millimeter-wave link or optical link. The architecture of terahertz satellite communication systems is proposed. © 2011 IEEE.


Dong Y.,Science and Technology on Space Microwave Laboratory | Dong S.,Science and Technology on Space Microwave Laboratory | Zhu Z.,Science and Technology on Space Microwave Laboratory | Wang Y.,Science and Technology on Space Microwave Laboratory
Proceedings - 2011 4th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2011 | Year: 2011

This paper presents a high efficiency power combining demonstration of two 100 W K-band TWTAs using a 4-port magic-T hybrid junction-based waveguide circuit. A low loss, amplitude and phase balanced, high power magic-T is designed for power combiner. Power combining efficiencies of greater than 90% and output power of more than 170W over a 0.6 GHz frequency band are successfully demonstrated. Such hybrid junctions can also be considered as elements within a corporate combining architecture for much higher power generating. © 2011 IEEE.


Li H.,Zhejiang University | Xu K.W.,Zhejiang University | Wang X.B.,Science and Technology on Space Microwave Laboratory | Kanan R.,University of Applied Sciences and Arts Western Switzerland | Ran L.X.,Zhejiang University
Electronics Letters | Year: 2013

Proposed is an ultra-low-profile loop antenna backed by an electromagnetic bandgap (EBG) surface reflector, where the EBG surface can effectively exhibit the property of a perfect magnetic conductor (PMC) inside a deliberately designed bandwidth. It is shown that, assisted by the effective PMC bandwidth, while the proposed antenna is with a 0.07-λ spacing between the loops and the EBG reflector, its axial ratio (AR) and voltage standing wave ratio (VSWR) performances are significantly improved. Experimental measurements show that the prototype antenna has a 3 dB AR bandwidth of 17% with an input VSWR less than 1.6. The proposed approach can find a wide range of low-profile circularly polarised (CP) antenna applications. © The Institution of Engineering and Technology 2013.


Xu K.,Zhejiang University | Zhu Z.,Science and Technology on Space Microwave Laboratory | Li H.,Zhejiang University | Huangfu J.,Zhejiang University | And 2 more authors.
IEEE Antennas and Wireless Propagation Letters | Year: 2013

In this letter, a compact coplanar-waveguide-fed single-layer printed antenna with an ultrawideband (UWB) rectangular monopole radiator etched with a half-elliptical slot is presented. Collaborating with the UWB radiator, two symmetrical open-circuit stubs are extended from the ground plane to jointly achieve an ultrawideband impedance match with a compact size. The proposed antenna is fabricated and tested in an anechoic chamber, showing an ultrawide operating frequency range from 3.7 to 10.1 GHz with a quasi-omnidirectional gain from 2.0 to 7.3 dBi. With the advantages of a reduced size, an improved voltage standing wave ratio (VSWR), and a monolayer configuration without any back ground plane, the proposed antenna can be used in a wide range of UWB applications. © 2002-2011 IEEE.

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