A5088333782- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Radio Frequency Integrated Circuit Design
- Photonic and Optical Devices
- Millimeter-Wave Propagation and Modeling
- Metallurgy and Material Forming
- Electromagnetic Compatibility and Noise Suppression
- Optical measurement and interference techniques
- Geophysical Methods and Applications
- Metal Alloys Wear and Properties
- Metal Forming Simulation Techniques
- Superconducting and THz Device Technology
- Microstructure and Mechanical Properties of Steels
- Gyrotron and Vacuum Electronics Research
- Microwave and Dielectric Measurement Techniques
- 3D Surveying and Cultural Heritage
- Advanced Measurement and Detection Methods
- 3D IC and TSV technologies
- Powder Metallurgy Techniques and Materials
- Microstructure and mechanical properties
- Geophysical and Geoelectrical Methods
- Advanced Welding Techniques Analysis
- Photonic Crystals and Applications
- Robotics and Sensor-Based Localization
Xi'an Jiaotong University
2013-2025
University of Electronic Science and Technology of China
2015-2024
Ministry of Education of the People's Republic of China
2021-2024
Northwest University
2024
Huzhou University
2024
Nokia (United States)
2024
Jiangsu University of Technology
2024
Zhejiang University
2023
Tianjin University of Technology and Education
2022
University of Birmingham
2015-2021
A fifth order X-band waveguide bandpass filter, based on spherical resonators, has been designed, and fabricated by 3-D printing. In comparison with rectangular waveguide, resonators have a higher unloaded quality factor, but at the same time suffer from closer modes. this letter, special topology proposed to relieve impact of first three modes in resonator ultimately achieve good out-of-band rejection. Stereolithography printing is used build filter structure polymer 25 μm thick copper...
This paper presents two W-band waveguide bandpass filters, one fabricated using laser micromachining and the other 3-D printing. Both filters are based on coupled resonators designed to have a Chebyshev response. The first filter is for it compact structure allowing whole be made from single metal workpiece. eliminates need split into several layers therefore yields an enhanced performance in terms of low insertion loss good durability. second produced polymer resin stereolithography...
A 3-D printed fourth-order cavity bandpass filter (BPF) centered at 10 GHz and with a 3% fractional bandwidth is presented in this letter. The BPF was designed using two high-Q spherical dual-mode resonators, fabricated stereolithography-based printing technique. Compared to filters constructed by square or cylindrical the use of resonator gives wider spurious-free region. In order fully exhibit light weight advantage additive manufacturing, redundant material outside removed. addition,...
ABSTRACT This paper proposed a SIGW wideband 3‐dB coupler that operates mainly in the Ka‐band by combining theory and of branch‐line coupler. Firstly, structure is analyzed. Then, designed using transmission line with five‐branch to realize wideband. Finally, fabricated measured, measurement results are consistent simulation results. The centered at 30 GHz has 40% wide bandwidth (24–36 GHz). return loss better than 10 dB isolation 17 dB. this operating bandwidth, high isolation, easy...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 124:237-245 (1995) - doi:10.3354/meps124237 Evaluating phytoplankton dynamics in Newport River estuary (North Carolina, USA) by HPLC-derived pigment profiles Tester PA, Geesey ME, Guo C, Paerl HW, Millie DF The composition and of assemblages during spring bloom a shallow, coastal-plain were characterized...
This article reports on a new class of broadband and fully 3-D printed E-plane coax-to-waveguide transition monolithically waveguide magic-T based the transition. The is constructed by section air-filled rectangular coaxial transmission line (TL) that placed between two probe transitions. It used to interconnect magic-T's sum port T-junction. incorporation reorients all arms into E-plane. Some X-band prototypes proposed are designed implemented. Polymer-based additive manufacturing copper...
This paper provides a comprehensive presentation for the RF design and implementation of novel millimeter-wave waveguide bandpass filters (BPFs) that are composed compact hemispherical resonators. The proposed resonator features high unload quality factor volume 50% smaller than spherical one more significantly is much less degenerate latter due to its structural asymmetry. With proper geometrical configurations, BPF can perform improved out-of-band rejections compared with BPFs same orders....
Summary Frequency‐domain detection stands as a critical method in remote geophysical exploration; however, its practical application is constrained by the considerable size of requisite instrumentation. In this paper, we present compact frequency domain electromagnetic system. The integration intelligent power devices and novel hardware architecture substantially diminishes system's dimensions, thereby enhancing portability. Furthermore, system design incorporates sinusoidal pulse width...
In this paper, a third-order waveguide bandpass filter (BPF) based on slotted spherical resonators with wide spurious-free stopband is presented. The resonator consists of cavity slots opened at the top and bottom. Compared non-slotted resonator, suppresses two spurious modes (TM211 TE101) whilst maintaining fundamental TM101 mode. unloaded quality factor mode not significantly degraded. This achieved by interrupting surface current radiating unwanted slots. BPF designed center frequency 10...
A novel waveguide step‐twist integrated with a bandpass filter is presented in this Letter. The twist composed of four equally rotated cavities to achieve polarisation rotation and filtering functionalities simultaneously. Such can significant reduction size weight. design demonstrated at Ka‐band using technology fabricated stereolithography apparatus 3D printing together metal plating. device designed have centre frequency 32 GHz bandwidth 1 GHz. measured result shows good agreement...
The design and performance of a WR-5 band 135-150-GHz Schottky diode-based frequency tripler which uses waveguide resonator filters for low loss impedance matching is presented in this paper. used paper provide filtering, matching, microstrip (MS) to transitions one structure. optimization achieved by scaling the external quality factors adjusting resonance filter cavities. This approach transfers most tripler's networks from MS circuitry lower rectangular resonators. desirable useful...
A 290-310 GHz Schottky diode based subharmonic mixer with integrated, low loss, impedance matching waveguide cavity filters is presented in this paper. This was designed for use a 300 communication system 20 intermediate frequency band centred at 15 GHz. Image rejection of the 260-280 lower sideband, as well matching, achieved using an integrated third-order filter RF waveguide. The conventional coupling matrix used to design even though port complex and dependent. measured have: 1) single...
This article presents a Ka-band fourth-order slotted spherical resonator waveguide bandpass filter (BPF) with wide spurious suppression stopband. It uses the first higher-order TM211 mode rather than fundamental TM101 of in order to obtain higher unload quality factor (Q <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">u</sub> ) for smaller in-band insertion loss, as well larger volume that gives better tolerance fabrication errors high frequency...
This article presents a comprehensive active N + 4 coupling matrix approach for the design of integrated filter-amplifier. The feedback between gate and drain, which is neglected in previous work, considered, improves accuracy model transistors. More importantly, relationship noise figure also established, extends method to tackle noise-related circuit functions. Substrate waveguide (SIW) filters are used implement an X-band filter-amplifier validate terms return loss, gain, noise. Compared...
This letter presents an eighth-order dual-mode waveguide filter, fabricated using the selective laser melting (SLM) technique. The filter employs four dimpled ellipsoid resonators, operating at fundamental TM<sub>101</sub> mode. During printing, can be mechanically self-supported without any internal supports. Compared to filters employing tuning posts, proposed is less sensitive fabrication errors in terms of their impacts on passband return loss (RL), frequency shift, and bandwidth. was...
Microwave filters are indispensable passive devices for modern wireless communication systems. Nowadays, electromagnetic (EM) simulation-based design process is a norm filter designs. Many EM-based methodologies microwave have emerged in recent years to achieve efficiency, automation, and customizability. The majority of methods exploit low-cost models (i.e., surrogates) various forms, artificial intelligence techniques assist the surrogate modeling optimization processes. Focusing on...