Search results for: Deshuang Zhao

Items from 1 to 20 out of 28 results

chapter

Shaping transient fields at microwave frequencies by time reversal focusing method

Deshuang Zhao, Fei Guo

2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting > 231 - 232

2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

A method to produce the complex time-varying electromagnetic fields of the desired intensity distribution at the specific time instant is proposed. First, this method utilizes the time reversal mirror (TRM) to generate a number of TR focusing fields with their focus spots spatially spaced at a certain interval. After that the desired time-varying fields are composed with them based on the linear superposition...

article

Wideband circularly polarised cavity backed monopole antenna for global navigation satellite systems

Shaoqing Hu, Xiaodong Chen, Deshuang Zhao, Yuan Yao

IET Microwaves, Antennas & Propagation > 2017 > 11 > 4 > 503 - 512

This study presents a single-feed wideband circularly polarised (CP) monopole antenna backed with a cavity for the application in global navigation satellite systems (GNSSs). The measured results indicate that it has a -10 dB impedance bandwidth of 75.02% from 1.062 to 2.337 GHz and a 3 dB axial ratio bandwidth of 67.40% from 1.21 to 2.44 GHz. The proposed antenna was tested and validated on a multi-mode...

chapter

Multipath effects on time reversal OFDM communications between wireless sensors

Zhixin Chen, Yuanfang Zhao, Deshuang Zhao

2016 11th International Symposium on Antennas, Propagation and EM Theory (ISAPE) > 376 - 379

2016 11th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

Time reversal orthogonal frequency division multiplexing (TR-OFDM) has recently been received significant concerns in wireless sensor networks (WSNs) applications for its reliable, high-speed, and green communications in multipath environments. However, most publically reported studies were typically performed in strongly multipath channels. In more general non-rich multipath environments, the TR-OFDM...

chapter

Focused field estimation of time reversal waves from wireless sensors in scattered environments

Deshuang Zhao, Cheng Zhou, Yuanfang Zhao, Bing-Zhong Wang

2016 11th International Symposium on Antennas, Propagation and EM Theory (ISAPE) > 372 - 375

2016 11th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

Radiation safety always goes the top priority in wireless biosensor networks. As a spatial-temporal focusing transmission technique, time reversal (TR) provides an effective approach to adaptively focus the electromagnetic energy on the intended biosensor nodes so that the essential bio-tissues of the body nearby the nodes can be protected from strong electromagnetic radiation. However, the focused...

chapter

Shaping microwave field of arbitrary intensity patterns in bounded area by time reversal mirror

Deshuang Zhao

2016 Progress in Electromagnetic Research Symposium (PIERS) > 4428

2016 Progress in Electromagnetic Research Symposium (PIERS)

How to freely generate the desired spatially-shaped fields at microwave frequencies in various media is an interesting topic. It is known from the uniqueness theorem of electromagnetics or the Kirchhoff-Helmholtz integral that the field inside a bounded region can be uniquely determined by its tangential fields on the enclosed surface. This theorem just tell us that if the tangential fields on surface...

chapter

Focus movement control for time reversal focusing microwaves

Deshuang Zhao, Hu Sun, Bing-Zhong Wang

2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT) > 1 > 309 - 311

2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT)

In this paper, we propose a method to control the focus movement of time reversal (TR) focusing waves. The focus movement is realized by proper design of the temporal excitation of time reversal mirror (TRM). Utilizing this excitation, the TRM can generate a sequence of time-delayed focusing waves and move their focal spots sequentially to the sampled spatial grids of the desired trajectory. With...

article

Design of WLAN/LTE/UWB Antenna with Improved Pattern Uniformity Using Ground-Cooperative Radiating Structure

Deshuang Zhao, Changxing Yang, Min Zhu, Zhixin Chen

IEEE Transactions on Antennas and Propagation > 2016 > 64 > 1 > 271 - 276

The radiating effect of metal ground is rarely considered in most antenna designs. In this communication, we show that a properly designed metal ground can serve as a cooperative lower frequency radiator for reducing the antenna dimensions, broadening impedance bandwidth, and achieving almost uniform omnidirectional patterns over a wide frequency band. By introducing a ground-cooperative radiating...

article

Generating Microwave Spatial Fields With Arbitrary Patterns

Deshuang Zhao, Min Zhu

IEEE Antennas and Wireless Propagation Letters > 2016 > 15 > 1739 - 1742

Resorting to the temporal excitation synthesis of a time-reversal mirror (TRM), we develop a method of how to physically generate the desired microwave fields in a predefined area. The new method composes the desired field patterns with a number of the time-reversal (TR) focusing fields generated by a TRM. We first decompose the region of the desired pattern into a number of spatial grids and then...

article

Experimental study of silicon‐based microwave switches optically driven by LEDs

Deshuang Zhao, Yifei Han, Qiaoli Zhang, Bing‐Zhong Wang

Microwave and Optical Technology Letters > 57 > 12 > 2768 - 2774

The feasibility of utilizing small‐size low‐cost commercial light‐emitting diodes (LEDs) to drive the optically controlled microwave switches (OCMS) is experimentally investigated. A series of experiments are performed within 0.5–5 GHz bandwidth by utilizing six kinds of LEDs and a 980 nm‐laser to drive the OCMS. The results show that white, red, and violet LEDs are three competitive candidates to...

chapter

Novel compact monopole antennas for global navigation satellite systems

Shaoqing Hu, Xiaodong Chen, Deshuang Zhao, Yuan Yao, more

2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation (APCAP) > 201 - 202

2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation (APCAP)

Two novel designs of compact circularly polarized (CP) monopole antennas are proposed and investigated in this paper. The first antenna, consisting of a printed L-shaped monopole and a tilted cross on the ground plane, exhibits 1.160∼2.042 GHz (55.10%) measured −10 dB impedance bandwidth, as well as 1.356∼1.637 GHz (18.78%) and 1.794∼2.487 GHz (32.38%) measured 3 dB AR bandwidths. Antenna 2 with a...

article

Near-Field Image Restoration for Rotman Lens by Localized Angle-Time Spread Function-Based Filtering Method

Min Yu, Deshuang Zhao, Yuanwei Jin, Bing-Zhong Wang

IEEE Transactions on Antennas and Propagation > 2015 > 63 > 5 > 2353 - 2358

Rotman lens is a prospective device for real-time microwave/millimeter-wave imaging by virtue of its parallel multibeam functionality. For imaging purposes, a Rotman lens intrinsically requires that the scattered waves arriving at the array be plane waves. However, this requirement cannot be met in near-field imaging applications, as the scattered waves from targets in the near field defocus at the...

chapter

Researches on time-reversed electromagnetics at UESTC

Bing-Zhong Wang, Yingming Chen, Deshuang Zhao

2014 Asia-Pacific Microwave Conference > 645 - 647

2014 Asia-Pacific Microwave Conference (APMC)

Due to the spatial and temporal focusing characteristics and spatial super-resolution focusing characteristics, time-reversed electromagnetic waves can be used to construct some novel electromagnetic systems, such as wireless communication systems with huge capacity and imaging systems with super-resolution. In this invited talk, researches on time-reversed electromagnetics at University of Electronic...

chapter

Sub-wavelength UWB antenna array with fractal slots and split ring resonators for time reversal super-resolution focusing

Changxing Yang, Min Zhu, Cheng Zhou, Deshuang Zhao

2014 IEEE International Conference on Communiction Problem-solving > 173 - 175

2014 IEEE International Conference on Communication Problem-Solving (ICCP)

Time reversal (TR) is a useful method that can focus electromagnetic waves precisely at the desired point in both time and space. In this paper, we find that properly designed and distributed micro-scatterers in the near-field zone of antenna array contribute to overcoming the diffraction limit. By directly integrating micro-structured fractal slots (FS) and split ring resonators (SRR) into each antenna...

chapter

Design of pulse-radiating bow-tie antenna with ellipsoid reflector for cancer treatment

Cheng Zhou, Jiangjiang Li, Min Zhu, Haitao Wang, more

2014 IEEE International Conference on Communiction Problem-solving > 50 - 52

2014 IEEE International Conference on Communication Problem-Solving (ICCP)

A pulse-radiating bow-tie antenna with enhanced electric-field focusing property in the near field is studied. The focusing property is achieved by placing an ellipsoid reflector around the bow-tie antenna. A section of microstrip reflection line combined with a photoconductive semiconductor switches is designed as a source to generate a short pulse for antenna excitation. In simulations, the surrounding...

chapter

A stacked UWB antenna with unidirectional radiation patterns for WBAN applications

Changxing Yang, Min Zhu, Cheng Zhou, Deshuang Zhao

2014 IEEE International Conference on Communiction Problem-solving > 483 - 484

2014 IEEE International Conference on Communication Problem-Solving (ICCP)

Directional antenna is very popular and useful in wireless body area network (WBAN) applications. This paper proposes a compact stacked UWB antenna with unidirectional wide-beam patterns. By appropriately introducing an open reflection cavity (ORC) and a parasitic E-shaped patch (PEP), the proposed antenna achieves good impedance bandwidth of 3.52GHz−10.64GHz, considerable gains and high front-to-rear...

article

ADE‐WCS‐FDTD method for general dispersive materials and PML implementation

Feng Liang, Aobo Chen, Deshuang Zhao, Bing‐Zhong Wang

Microwave and Optical Technology Letters > 56 > 11 > 2489 - 2495

An auxiliary differential equation (ADE) based weakly conditionally stable finite‐difference time‐domain (FDTD) method is presented for analysis of wave propagation in general hybrid dispersive materials. The perfectly matched layer is implemented in this novel scheme. Larger time step can be used and hence higher computational efficiency is obtained in this approach, as compared to conventional ADE‐FDTD...

chapter

Optically controlled microstrip patch antenna with reconfigurable null beams

Deshuang Zhao, Yifei Han, Litao Lan, Feng Liang, more

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI) > 1260 - 1261

2014 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

An optically controlled microstrip patch antenna is presented by exploring the phase changes of the parasitic element to generate reconfigurable null beams. This antenna is featured with attractive performance of optically-tuned null depth, low optical power requirement, and almost unchanged impedance bandwidth. Both simulations and experimental results validate the design.

article

Optically Controlled Reconfigurable Band-Notched UWB Antenna for Cognitive Radio Applications

Deshuang Zhao, Litao Lan, Yifei Han, Feng Liang, more

IEEE Photonics Technology Letters > 2014 > 26 > 21 > 2173 - 2176

By utilizing two optically controlled microwave switches (OCMSs) to control two independent narrow-band complementary split ring resonators, an optically controlled aperture ultrawideband antenna capable of generating reconfigurable multiband notches is proposed. Four reconfigurable states are achieved in the 3.1–10.6-GHz band: 1) a full FCC-allowed band; 2) a WiMax-notched band; 3) a WLAN-notched...

article

Time Reversal Based Timing Acquisition for Ultra-Wideband Wireless Communications: Numerical and Experimental Study

Deshuang Zhao, Bing-Zhong Wang, Yuanwei Jin

Wireless Personal Communications > 2014 > 77 > 4 > 3013-3026

A novel timing acquisition method is proposed for ultra-wideband (UWB) wireless communications in dense multipath environments. This method is based on the time reversal technique that employs the temporally reversed channel probing waveforms rather than initial source pulses as the carrier to send the timing preambles. The temporally reversed channel probing waveforms are obtained by simply flipping...

article

Wideband Impedance Model for Coaxial Through-Silicon Vias in 3-D Integration

Feng Liang, Gaofeng Wang, Deshuang Zhao, Bing-Zhong Wang

IEEE Transactions on Electron Devices > 2013 > 60 > 8 > 2498 - 2504

Coaxial through-silicon via (TSV) is a promising 3-D integration solution, which can offer lower coupling with its surrounding environment and achieve better electromagnetic compatibility and signal integrity than other TSV structures. In this paper, an analytical wideband equivalent circuit model is proposed for the impedance modeling of coaxial TSVs in 3-D integration. Closed-form formulas for calculations...

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Keywords

TIME REVERSAL (8)
FOCUSING (7)
ARRAYS (4)
TRANSMISSION LINE MEASUREMENTS (4)
ULTRA WIDEBAND ANTENNAS (4)
ANTENNA ARRAYS (3)
ANTENNA MEASUREMENTS (3)
ANTENNA RADIATION PATTERNS (3)
OPTICAL SWITCHES (3)
OPTICALLY CONTROLLED MICROWAVE SWITCH (3)
RECEIVING ANTENNAS (3)
SUPER-RESOLUTION (3)
ULTRA-WIDEBAND (3)
CAVITY RESONATORS (2)
FIELD SHAPING (2)
INSERTION LOSS (2)
MICROWAVE ANTENNAS (2)
MICROWAVE IMAGING (2)
MICROWAVE THEORY AND TECHNIQUES (2)
MONOPOLE ANTENNA (2)
NUMERICAL MODELS (2)
OPTICAL CONTROL (2)
OPTICAL RING RESONATORS (2)
REFLECTION (2)
REFLECTOR ANTENNAS (2)
SIGNAL RESOLUTION (2)
SILICON DICE (2)
SLOT ANTENNAS (2)
SPATIAL RESOLUTION (2)
WIDEBAND (2)
WIRELESS COMMUNICATION (2)
3-D INTEGRATION (1)
ANTENNAS (1)
APPLICATIONS (1)
ARRAY SYNTHESIS (1)
AUXILIARY DIFFERENTIAL EQUATION (1)
BANDWIDTH (1)
BANDWIDTH 1.062 GHZ TO 2.337 GHZ (1)
BANDWIDTH 1.21 GHZ TO 2.44 GHZ (1)
BEAM STEERING (1)
BEAM-STEERING ARRAYS (1)
BIT ERROR FLOOR (1)
BROADBAND SYNTHESIS (1)
CHIRP (1)
CHIRPED DELAY LINE (1)
CIRCULARLY POLARIZED(CP) (1)
COAXIAL THROUGH-SILICON VIA (TSV) (1)
COEXISTENCE (1)
COMPACT (1)
COMPLEMENTARY SPLIT RING (1)
COMPLEMENTARY SPLIT-RING RESONATOR (1)
DISPERSION (1)
DISPERSIVE MEDIA (1)
EDDY CURRENT (1)
ELECTRIC FIELDS (1)
ELECTROMAGNETIC COMPATIBILITY (1)
ELECTROMAGNETIC PROPAGATION (1)
ELECTROMAGNETICS (1)
ELLIPSOIDS (1)
EQUIVALENT CIRCUIT MODEL (1)
EXCITATION SYNTHESIS (1)
FILTERING (1)
FINITE-DIFFERENCE TIME DOMAIN (FDTD) (1)
FINITE‐DIFFERENCE TIME‐DOMAIN (1)
FOCUSING FIELD (1)
FOURIER TRANSFORMS (1)
FRACTALS (1)
FREQUENCY SYNTHESIZERS (1)
GLOBAL NAVIGATION SATELLITE SYSTEM (1)
GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSSS) (1)
GNSS RECEIVER (1)
GROUND-COOPERATIVE RADIATING STRUCTURE (1)
IMAGE RESOLUTION (1)
IMAGE RESTORATION (1)
IMAGING (1)
IMPEDANCE (1)
INVERSE RAY MODEL (1)
LENSES (1)
LIGHT‐EMITTING DIODE (1)
LONG-TERM EVOLUTION (1)
MEDIA (1)
METALS (1)
MICROSTRIP (1)
MICROSTRIP ANTENNAS (1)
MICROSTRUCTURED ARRAY (1)
MICROWAVE CIRCUITS (1)
MICROWAVE COMMUNICATION (1)
MICROWAVE TECHNOLOGY (1)
MIRRORS (1)
MONOPOLE ANTENNAS (1)
MULTIPATH (1)
NEAR-FIELD IMAGING (1)
NUMERICAL TECHNOLOGY (1)
OFDM (1)
OPTICAL RESONATORS (1)
OPTICAL VARIABLES MEASUREMENT (1)
ORTHOGONAL ELECTRIC FIELD COMPONENTS (1)
PERFECTLY MATCHED LAYER (1)
PHASE CENTER (1)
PHASE COMPENSATION (1)
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ieee (23)
Wiley (3)
Elsevier (1)
Springer (1)

INFONA - science communication portal

Search results for: Deshuang Zhao

Shaping transient fields at microwave frequencies by time reversal focusing method

Wideband circularly polarised cavity backed monopole antenna for global navigation satellite systems

Multipath effects on time reversal OFDM communications between wireless sensors

Focused field estimation of time reversal waves from wireless sensors in scattered environments

Shaping microwave field of arbitrary intensity patterns in bounded area by time reversal mirror

Focus movement control for time reversal focusing microwaves

Design of WLAN/LTE/UWB Antenna with Improved Pattern Uniformity Using Ground-Cooperative Radiating Structure

Generating Microwave Spatial Fields With Arbitrary Patterns

Experimental study of silicon‐based microwave switches optically driven by LEDs

Novel compact monopole antennas for global navigation satellite systems

Near-Field Image Restoration for Rotman Lens by Localized Angle-Time Spread Function-Based Filtering Method

Researches on time-reversed electromagnetics at UESTC

Sub-wavelength UWB antenna array with fractal slots and split ring resonators for time reversal super-resolution focusing

Design of pulse-radiating bow-tie antenna with ellipsoid reflector for cancer treatment

A stacked UWB antenna with unidirectional radiation patterns for WBAN applications

ADE‐WCS‐FDTD method for general dispersive materials and PML implementation

Optically controlled microstrip patch antenna with reconfigurable null beams

Optically Controlled Reconfigurable Band-Notched UWB Antenna for Cognitive Radio Applications

Time Reversal Based Timing Acquisition for Ultra-Wideband Wireless Communications: Numerical and Experimental Study

Wideband Impedance Model for Coaxial Through-Silicon Vias in 3-D Integration

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