A5012411142- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Radio Frequency Integrated Circuit Design
- Millimeter-Wave Propagation and Modeling
- Advanced Power Amplifier Design
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Full-Duplex Wireless Communications
- Advanced MIMO Systems Optimization
- Electromagnetic Simulation and Numerical Methods
- Energy Harvesting in Wireless Networks
- Wireless Communication Networks Research
- Acoustic Wave Resonator Technologies
- Photonic and Optical Devices
- Electromagnetic Compatibility and Noise Suppression
- Advancements in PLL and VCO Technologies
- Electromagnetic Scattering and Analysis
- Lightning and Electromagnetic Phenomena
- Ultra-Wideband Communications Technology
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Advanced Wireless Communication Techniques
- PAPR reduction in OFDM
- Advanced DC-DC Converters
- Electromagnetic Compatibility and Measurements
Southeast University
2016-2025
State Key Laboratory of Millimeter Waves
2016-2025
Purple Mountain Laboratories
2019-2024
Southwest Jiaotong University
2023
Southeast University
2004-2022
Shandong University of Science and Technology
2022
China University of Petroleum, Beijing
2020
Heilongjiang University
2018
National University of Defense Technology
2014
Wuhan University of Technology
2004
With the demanding system requirements for fifth-generation (5G) wireless communications and severe spectrum shortage at conventional cellular frequencies, multibeam antenna systems operating in millimeter-wave frequency bands have attracted a lot of research interest been actively investigated. They represent key technology supporting high data transmission rate, an improved signal-to-interference-plus-noise ratio, increased spectral energy efficiency, versatile beam shaping, thereby...
A 64-channel massive multiple-input multiple-output (MIMO) transceiver with a fully digital beamforming (DBF) architecture for fifth-generation millimeter-wave communications is presented in this paper. The DBF-based MIMO operated at 28-GHz band 500-MHz signal bandwidth and the time division duplex mode. antenna elements are arranged as 2-D array, which has 16 columns (horizontal direction) 4 rows (vertical better resolution horizontal plane. To achieve half-wavelength element spacing...
Three types of ultrawideband (UWB) antennas with triple notched bands are proposed and investigated for UWB communication applications. The consist a planar circular patch monopole antenna multiple etched slots on the and/or split ring resonators (SRRs) coupled to feed line. Good agreement is achieved between simulated measured results. These techniques significant designing narrow frequency or multiband antennas.
A low-complexity metallic tapered slot antenna (TSA) array for millimeter-wave multibeam massive multiple-input multiple-output communication is proposed in this paper. Good beamforming performance can be achieved by the developed because element spacing easily meet requirement of half-wavelength H-plane. The fed a substrate-integrated waveguide, which directly integrated with circuits. TSA fabricated and measured. Measured results show that reflection coefficient lower than -15 dB Voltage...
A 24-beams slot array antenna, which achieves 360-degrees coverage over azimuth direction, based on substrate integrated waveguide (SIW) technology is designed, fabricated and measured for supporting the concept of triangle cell, beam diversity multiple input output (MIMO) wireless communications. Constructed by six 4-beams single layer SIW antennas integrate 4times8 modified Butler matrix with a low side lobe level (SLL) amplitude distribution, SLLs are reduced as -14.5 dB all beams in...
A simple technique is developed in this communication to increase the axial ratio (AR) bandwidth and achieve good impedance matching of a single-fed low profile circularly polarized (CP) stacked patch antenna. The proposed antenna composed driven layer parasitic layer. consists truncated main patch, probe feeding structure while comprised five patches. combines attractive features such as profile, wide AR bandwidths, high gain well easiness design, manufacture integration. operating at 6 GHz...
The integration of the sub-6 GHz and millimeter-wave (mmWave) antennas has become an important issue for next-generation wireless communication. For mmWave band, adaptive beam steering is required to solve path loss coverage range problems. In this communication, aperture-sharing technique developed, so that a four-unit linear 28 array 3.5 dipole antenna can be integrated same aperture shared. SIW utilized enable maintain radiation both antennas, without mutual interference. By adopting...
A planar circularly polarized substrate integrated waveguide (SIW) stacked patch antenna array consisting of four sequential-rotation (SR) subarrays is presented for Ka-band applications. Antenna element realized based on a pair cavities by the combination driven layer and parasitic layer, which are formed shorted square multiple identical patches, respectively. Each subarray two pairs elements, excited coplanar (CPW) network with metallic vias, well matched to novel SIW SR feeding network....
In this article, novel millimeter-wave (mmWave) filtennas (filtering antennas) are proposed to realize compact size and low insertion loss for 5G applications. It is achieved by employing eighth-mode substrate-integrated waveguide (EMSIW) cavities fully shielded metallized vias cover as resonators, which named EMSIW (FSD-EMSIW) cavities. Interdigital coupling between introduced in order obtain higher strength wideband operation. The single-polarized antenna consists of a feeding stripline,...
In this letter, a low-cost continuously tunable substrate integrated waveguide (SIW) resonator and low phase noise SIW voltage-controlled oscillator (VCO) are presented. A simple new structure for coupling varactor to the cavity is proposed, which realizes circuit layout tuning resonator. Equivalent model given coupled Relation between coefficient <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex...
A technique is developed in this letter to enhance the impedance and axial-ratio (AR) bandwidths as well broadside gain of a sequential phase (SP) feed 2 × patch array. The proposed antenna composed probe-fed patch, corner truncated array with loop, slotted metal wall surrounding feeding structure. combines attractive features such wide AR bandwidths, low profile, easiness design manufacture. operating at 5-GHz band designed fabricated overall volume 1.5 λ <sub...
Integrating the sub-6 GHz antenna and millimeter-wave (mm-wave) in one radiating aperture is a promising approach to support different frequency bands for incoming communication system. In this article, an mm-wave dual-polarized 64 element phased-array integrated into partially reflective surface (PRS) of resonant cavity (RCA). The PRS consists two multilayer printed circuit boards (PCBs), which are stacked together connected by solder joints. thick unit cell designed with miniaturized...
This paper presents a 28-GHz low-cost highprecision phased array for fifth-generation millimeter-wave communications. The local oscillator (LO) phase shifting approach and the subharmonic mixing technique are adopted to achieve full 360° phase-shifting range with up 10-bit resolution ultralow magnitude deviation. Each channel in this contains 1-bit 180° intermediate frequency shifter low-voltage varactor-tuned reflective-type at LO path. is used fine low-magnitude variation. enables lower...
In this letter, a low phase noise free-running oscillator employing substrate integrated waveguide (SIW) dual-mode bandpass filter (BPF) is presented. As frequency stabilization element in the feedback loop, SIW BPF designed at oscillation frequency. Due to transmission zero near upper passband of filter, large group delay peak edge can be achieved improve performance significantly. An X-band using SiGe HBT has been and experimentally demonstrated 11.571 GHz. Measured results show that,...
In this paper, the development of a millimeter-wave hybrid beamforming (HBF) transceiver system for 5G multiple-input-multiple-output (MIMO) communication is presented. The developed operated at 28-GHz band in time division duplex (TDD) mode, with 500-MHz signal bandwidth. To implement high accuracy, phased-array-based HBF high-precision phase shifting network (PSN) intermediate-frequency (IF)-paths proposed. designed PSN has 8-bit resolution within 360° range and 0.13-dB amplitude...
This letter reports a strategy of full-digital arrays with nonreciprocal transmitting (Tx) and receiving (Rx) beam patterns, for the first time, 5G/6G wireless communications. The proposed array contains smaller number Rx channels than that Tx channels. unequal makes patterns asymmetrical, which would not only release burden data processing but also reduce hardware cost power consumption entire system. Importantly, as compared conventional large-scale beamforming arrays, will deteriorate...
A novel wideband magnetoelectric (ME) dipole antenna with dual circular polarization and unidirectional radiation is proposed in this letter. The based on two perpendicular sub-ME dipoles realized by four V-shaped patches V-section columns, each of them composed an electric a magnetic parallel. Fed simple Γ-shaped feeds, 90° phase difference between the achieved, hence dual-circularly polarized generated. Wide impedance bandwidth obtained virtue kinds being excited simultaneously. 3 dB...
A low phase noise X-band oscillator based on the bandpass response power divider in single-layer substrate integrated waveguide (SIW) technology is presented this letter. The embedded SIW filter; therefore, lower insertion loss and more compact area size can be realized than those using independent design of both components. To achieve better performance, transmission zeros are introduced by cross coupling through resonant cavities to increase peak group delay. In addition, placing external...
This letter proposes a broadband high isolation and power compact single pole double throw (SPDT) switch. In contrast to the traditional structure of grounded source pad, pad shunt-stacked FET is absorbed into transmission line, drain shuntstacked via-hole. helps extend operation bandwidth reduce chip size. The proposed SPDT switch composed six units on each branch with this novel structure. Stacked FETs technique increases voltage handling by placing two in series. It has been fabricated...
A modified canonical piecewise-linear function (CPWL)-based model is proposed for characterizing wideband power amplifiers. The has a similar structure of the decomposed vector rotation (DVR) but without DVR operations, in which first-order basis can be replaced by second-order analysis. lower complexity than and parameter scan estimated least-square method. Experimental results show that nearly gives same normalized mean square error performance as when Doherty amplifier excited 5-carrier...
A millimeter-wave printed ridge gap waveguide fed filtering metasurface antenna (MSA) array is presented for 5G applications. The MSA element consists of a parasitic loop and stacked patch. elaborately designed around not only provides satisfactory lower stopband performance but also brings an in-band resonance. Meanwhile, another upper edge radiation null generated by introducing two square-ring slots on the MSA, improving suppression level. Therefore, with no extra circuits, desirable...
A wideband circularly polarized (CP) planar U-shaped antenna array is presented for millimeter-wave (mm-wave) applications. First, the element consists of two tilted parasitic patches fed by a slot etched on substrate integrated waveguide (SIW). An improved simulated axial ratio (AR) bandwidth 40% achieved stacking and patch element. Then, right- left-handed orthogonal unit vectors resonant circuit technique are employed to explain CP operating principle. Finally, an <inline-formula...
In this letter, dynamic fuzzy neural networks (D-FNN) are applied to model power amplifiers (PAs) with memory effects. The D-FNN implements Takagi-Sugeno-Kang (TSK) systems based on extended radial bias function (RBF) networks. parameters of the trained by online self-organized learning algorithm, in which neurons can be recruited or deleted dynamically according their significance system performance, and over fitting training problems avoided. is validated our test bench a Doherty PA...