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Design of Cross-Shaped CPW-Fed Ultrawideband Slot Antenna
摘要： A new design of ultrawideband (UWB) antenna of coplanar waveguide (CPW)-fed is proposed. The antenna is composed of a cross-shaped patch and house-shaped slot with the minimum dimension of 21 mm × 20 mm × 1.6 mm. The analysis of S11, VSWR, radiation pattern and surface current is discussed with HFSS simulation software, and also the effect of parameters is presented. Experimental results show that the bandwidth of the antenna covers 110.67% (3.3—11.6 GHz) of UWB range with return loss better than 10 dB. And the good impedance matching in frequency band confirms the antenna is a good candidate for the application of wireless system.
关键词： return loss,ultrawideband (UWB),coplanar waveguide,HFSS
更新于2025-09-23 15:23:52
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Low Complexity Algorithm for Range-Point Migration-Based Human Body Imaging for Multistatic UWB Radars
摘要： High-resolution, short-range sensors that can be applied in optically challenging environments (e.g., in the presence of clouds, fog, and/or dark smog) are in high demand for various applications. Ultrawideband radar is a promising sensor that is suitable for short-range surveillance or watching sensors. Range-point migration (RPM) has been recently established as a promising imaging approach to achieve accurate and real-time 3-D imaging. However, when objects with many scattering points are dealt with, such as a human body, RPM suffers from high computational costs. In this letter, we propose an algorithm with a lower complexity for an RPM-based 3-D imaging method by introducing a sampling-based scattering center extraction with a simpli?ed evaluation function, in which an ef?cient sample pattern is provided by a golden ratio. The results from a ?nite-difference time-domain-based numerical test, which introduces a realistic human body object, demonstrate that our proposed method remarkably reduces the computational cost without sacri?cing the reconstruction accuracy.
关键词： ultrawideband (UWB) radar,short-range sensor,multistatic observation model,3-D imaging,range-point migration (RPM)
更新于2025-09-23 15:21:21
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[IEEE 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - Odessa, Ukraine (2018.9.4-2018.9.7)] 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - The Wideband Pulsed Antenna and its Application
摘要： This paper presents a design of the antenna with an expandable slot for effective radiating and receiving the ultra-wideband (UWB), short-pulse (SP) signals. The offered design of the antenna allows creating an interferential electromagnetic field of a bipolar pulse in an equivalent general antenna aperture. A quantitative and quality is evaluation of efficiency of proposed antenna design performed. It is shown that an application of the given antenna allows increasing the damaging range from acting the pulsed UWB signals.
关键词： temporal position-pulse transmission,wireless system,electromagnetic compatibility,wideband pulsed antenna,ultrawideband signal,data modulation
更新于2025-09-23 15:21:21
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[IEEE 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - Odessa, Ukraine (2018.9.4-2018.9.7)] 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - Modeling of Random Ultrawideband Signals and Antenna for Their Radiation
摘要： Possible approaches to the modeling of random ultra-wideband signals are discussed. The perspectivity of using the apparatus of stochastic differential equations for solving this problem is underlined and the merits of this approach are noted. The requirements for ultra-wideband antennas are described and prototypes of such antennas are described.
关键词： ultra-wideband signal,ultrawideband antenna,random process
更新于2025-09-23 15:21:21
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[IEEE 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - Odessa, Ukraine (2018.9.4-2018.9.7)] 2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) - Ultrashort Impulse Radiation from Plane Disk with Uniform Current Distribution
摘要： The problem of transient radiation from plane disk with uniform current distribution solved by Evolutionary Equation method in Time Domain. The solution for all components of electromagnetic field is received by means of Riemann function method for Klein-Gordon equation for time dependence of current in form of Heaviside function. Using Duhamel integral the generalization of the solution for arbitrary time dependence is obtained. Amplitude and energy characteristics of radiated field are investigated for different observation distances and angles as well as time shapes of exciting current. The solution for an arbitrary time dependence of plane disk radiation is used to investigate the applicability of impulse radiation in radio communication and radar problems.
关键词： plane disk radiation,impulse communication,time domain,ultrawideband ultrashort pulse (UWB-SP),Duhamel integral,electromagnetic missile
更新于2025-09-23 15:21:21
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[IEEE 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Guangzhou, China (2019.5.19-2019.5.22)] 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Design of Tightly Coupled Planar Ultrawideband Modular Antenna with Improved Low-frequency Gain Based on AMC Structure
摘要： A novel tightly coupled planar ultrawideband (UWB) modular antenna (PUMA) with improved low-frequency gain based on artificial magnetic conductor (AMC) is presented in this paper. Conventional PUMA becomes popular for ease of fabrication and low profile. However, it also suffers from low low-frequency gain. A dual-band (6-10.5 GHz, 12-18 GHz) AMC structure is introduced to help improve low-frequency gain. The proposed antenna possesses 3:1 bandwidth (VSWR<3). The low-frequency gain (6-10.5 GHz) of 1*16 and 4*4 array is improved by 8 dBi and 5 dBi respectively. The high-frequency gain (12-18 GHz) is improved by 2 dBi and 4 dBi. Detailed simulation is also presented.
关键词： modular antenna,low-frequency gain,AMC structure,Ultrawideband
更新于2025-09-23 15:21:01
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Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station
摘要： Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results.
关键词： miniaturized,vivaldi antenna,ultrawideband,high gain,surface plasmons
更新于2025-09-23 15:21:01
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Supercompact and Ultrawideband Surface Plasmonic Bandpass Filter
摘要： We propose a supercompact and ultrawideband (UWB) bandpass filter for spoof surface plasmonic polariton (SSPP) mode. By using meander-line technology, the electrical size of the proposed SSPP structure is reduced dramatically, which is only about 1/4 of the traditional rectangular-groove structure with the same geometry. Based on the proposed SSPP structure, we construct a supercompact UWB bandpass filter working in the frequency range of 0.25–4.5 GHz, whose geometric size is only 87.5 × 12.8 mm2. The upper cutoff frequency of the passband can be controlled by changing the meander-line design of the SSPP unit, and the lower cutoff frequency of the passband is determined by the capacitive coupling of the feeding structure. Both the simulation and experimental results show that the UWB SSPP bandpass filter is centered at 2.4 GHz with an extremely wide relative bandwidth of 174%, whose electrical size is only 0.7λ × 0.1λ at the central frequency.
关键词： Supper compact,ultrawideband (UWB) bandpass filter,surface plasmon polariton
更新于2025-09-16 10:30:52
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An IR-UWB Angle-of-Arrival Sensor IC Using Auto-Toggled Time-to-Digital Converter
摘要： This letter introduces an impulse radio-ultrawideband (IR-UWB) angle-of-arrival (AoA) sensor integrated circuit (IC) using an auto-toggled time-to-digital converter (TDC). The detectable range of the proposed AoA sensor can be extended by a factor of 2 by utilizing an auto-toggle operation that toggles the TDC’s input signal according to the target’s position. The analog front end (AFE) of the receivers is designed with a 3–5 GHz band and the system comprises two AFEs and one digital back end (DBE). The proposed IR-UWB AoA sensor IC was fabricated using a 65-nm CMOS process. The measurable angular range was ± 40?, and an angle error of ± 1.5? was measured.
关键词： impulse radio-ultrawideband (IR-UWB),time-to-digital converter (TDC) with auto-toggle,Angle-of-arrival (AoA)
更新于2025-09-11 14:15:04
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Compact high gain UWB antenna using fractal geometry and UWB-AMC
摘要： A miniaturized fractal antenna using Coplanar Wave Guide (CPW) fed and ultrawideband (UWB)-artificial magnetic conductor (AMC) for ultra wideband and Active integrated application is designed and presented. This antenna covers frequency range from 2.5 to 10 GHz with ultrabandwidth of 7.5GHz and return loss well below ?10 dB over the entire band of application. The antenna has an average gain of 3.35 dB without AMC and 7.7 dBi with UWB-AMC. Physical dimension of the proposed antenna is (27 × 28 mm × 1.6) mm3 and for UWB-AMC is (40 × 40 × 1.6) mm3. Complet set of UWB-antenna and A.MC- is fabricated using FR.-4 substrate with εr = 4.4, d = 0.0001and thickness (h) = 1.6 mm. Ansys HFSS Tool is used to analyze and optimize the parameters of antenna and UWB-AMC. Vector Network Analyzer is used to validate the experimental result with simulation parameter of proposedantenna.
关键词： CPW feed,fractal geometry,ultrawideband artificial magnetic conductor (UWB-AMC),Sierpinski carpet
更新于2025-09-10 09:29:36