A5100757215- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Full-Duplex Wireless Communications
- RFID technology advancements
- Radio Frequency Integrated Circuit Design
- Energy Harvesting in Wireless Networks
- Electromagnetic Compatibility and Noise Suppression
- Photonic and Optical Devices
- Advanced Sensor and Energy Harvesting Materials
- Acoustic Wave Resonator Technologies
- Advanced MIMO Systems Optimization
- Millimeter-Wave Propagation and Modeling
- Advanced Fiber Optic Sensors
- Microwave and Dielectric Measurement Techniques
- Cooperative Communication and Network Coding
- Nanomaterials and Printing Technologies
- Advanced Sensor and Control Systems
- Antenna Design and Optimization
- Semiconductor Lasers and Optical Devices
- Energy Efficient Wireless Sensor Networks
- Wireless Body Area Networks
- Innovative Energy Harvesting Technologies
- IoT-based Smart Home Systems
- Gyrotron and Vacuum Electronics Research
Universidad de Alcalá
2019-2024
University of Electronic Science and Technology of China
2012-2024
University of Macau
2011-2024
City University of Macau
2024
South China University of Technology
2014-2024
Shandong Institute of Business and Technology
2007-2022
Southeast University
2020-2021
Hospital Universitario del Henares
2021
Baylor University
2021
Nanjing Normal University
2021
This paper discusses the evolution towards first integrated radio-frequency identification (RFID)-enabled wireless sensor network infrastructure using ultra-high frequency/radio frequency (UHF/RF) RFID-enabled nodes and inkjet-printed electronics technologies on flexible substrates for time ever. The sections highlight unique capabilities of inkjet printed as well benefits ultra-low-cost, conformal environmentally friendly substrate mass-scale ubiquitous implementation sensing applications....
In this letter, based on a corner-cut square metasurface, planar polarization conversion structure is presented and the application for wide band low-profile circular (CP) slot antenna proposed. The mechanisms achieving CP state from linearly polarized incident wave broadening working bandwidth of conventional are analyzed theoretically. achieved with numerical optimizations parameter studies. Both simulations measurements performed to demonstrate proposed antenna, good agreements obtained....
Light-weight antenna arrays require utilizing the same aperture to provide multiple functions (e.g., communications and radar) in separate frequency bands. In this paper, we present a novel element design for dual-band array, comprising interleaved printed dipoles spaced avoid grating lobes each band. The folded are designed be resonant at octave-separated bands (1 2 GHz), inkjet-printed on photographic paper. Each dipole is gap-fed by voltage induced electromagnetically from microstrip line...
A type of compact single/multi-band coupled-multiline filtering section and its application to the design RF devices are presented. This one-port cell is made up N + 1 intercoupled quarter-wavelength transmission-line segments for generation a transfer function with total transmission zeros (TZs) distributed at both sides all first-order passbands when arranged in mode. Design formulas produced poles TZs corresponding normalized coupling-routing diagram illustrative theoretical responses...
This paper presents a novel balanced dual-band bandpass filter with in-band common-mode suppression via multiple transmission zeros from the doubly short-ended coupled line. Through analysis of line structures, in differential- and equivalent circuits are extensively studied. In differential-mode, zeros, produced by both open stub, independently controlled, desired two resonant frequencies achieved studying characteristics half-wavelength resonator. For suppression, intrinsic...
This paper first presents two types of wideband microstrip-to-microstrip equal ripple vertical transitions designed with the uniform and folded slotline structures, respectively. By solving characteristic function differential calculation, condition for realizing constant frequency response but different bandwidths (BWs) proposed transition is determined resorting to impedances coupled open-circuited microstrip line slotline. Then, a synthetically analyzed Chebyshev polynomial another...
A class of stepped-impedance resonator (SIR) dual-band bandpass filter (BPF) with selectivity-enhancement cells is reported. These filtering cells, which are composed two open-ended transmission-line segments interconnected at the input, added one node input and output coupled-line stages. Thus, regard to SIR BPF without they increase order each passband by simultaneously generate transmission zeros (TZs) both sides bands. The operating principles proposed detailed coupling-routing-diagram...
An approach to design RF all-port-reflectionless quasi-elliptic-type single-/dual-band bandpass filters (BPFs) and diplexers with frequency-adaptive constant-absolute-bandwidth (ABW) response is reported. The tunable reflectionless BPF case first addressed, where a balanced-circuit scheme composed of two identical wideband 3-dB quadrature couplers equal reflective-type units synchronous center-frequency agility exploited. input signal split into the amplitude 90° phase shift by coupler then...
An RF input-quasi-reflectionless bandpass filter (BPF) with reconfigurable center frequency and constant absolute bandwidth (ABW) is presented. The proposed BPF based on a tunable complementary-diplexer architecture, which made up of main bandpass-type channel an auxiliary nearly-complementary bandstop-type filtering response that are synchronously reconfigured in frequency. terminated by resistor to absorb the power reflected within its out-of-band region. In this manner, capability...
An approach for the realization of radiofrequency (RF)/microwave balanced filters with simultaneous differential-mode (DM) and common-mode (CM) two-port-reflectionless behavior bandpass, quasi-bandstop, dual-passband applications is reported. These RF filtering components exploit as basic constituent circuit block a type two-layer broadband magic-T, in which its two-side/coplanar arms are designed feeding ports at top layer. Specifically, two replicas this wideband magic-T on...
A compact multi-broadband planar antenna is proposed for wireless handsets. The covers multiple broad frequency bands, including the 900-MHz band with a bandwidth of 29% (790-1061 MHz), 2-GHz 51% (1650-2775 and 3.5/5-GHz 68% (3132-6382 MHz). consists folded monopole coupling to an S-shaped strip band, C-shaped trapezoidal inverted-F band. All these monopoles coupled strips are printed on substrate size 15 mm×60 mm×0.5 mm, suitable emerging ultra-slim GSM/UMTS/LTE WLAN/WiMAX
We demonstrate a three cascaded micro-ring resonators based refractive index optical sensor with high sensitivity of 5866 nm/RIU, the measurement range which is significantly improved 24.7 times comparing traditional two resonators.
RF/microwave bandpass filters (BPFs) are fundamental components in high-frequency RF transceivers. On the transmitter side, they limit transmitted signal bandwidth by suppressing out-of-band spurious signals and intermodulation products, which primarily generated nonlinear active stages can affect other systems. hand, receiver, reject interfering/jamming noise. Whereas a large variety of microwave BPFs have been proposed technical literature for multiple technologies (e.g., [1] [2]), most...
A planar quasi-Yagi antenna with cointegrated filtering functionality and flat in-band gain is reported. It exploits complementary-diplexer-based reflectionless-filtering techniques through the inclusion of an absorptive branch to realize codesigned functionality. This consists a second-order bandstop-filter (BSF) unit loaded by grounded resistor that connected in parallel initial antenna. By designing reflection coefficients basic be nearly complementary frequency, out-of-band RF power not...
A high-selectivity hybrid-technology bandpass filter (BPF) at the K band using an inverted microstrip gap waveguide (MGW) approach is reported. The resonant frequencies of modes TE102 and TE103 (i.e., f102 f103) its non-perturbed groove cavity resonator—as example TE being contained within extracted stopband range mushroom-type EBG cells—are firstly analyzed. By perturbing referred with a pin-loaded patch, second-order BPF block adjustable transmission zero (TZ) implemented. Moreover, by...
This paper introduces for the first time a novel flexible magnetic composite material RF identification (RFID) and wearable antennas. First, one conformal RFID tag working at 480 MHz is designed fabricated as benchmarking prototype miniaturization concept verified. Then, impact of thoroughly investigated using hybrid method involving electromagnetic statistical tools. Two separate experiments are performed, analysis relative permittivity permeability proposed other evaluation dielectric loss...
This Letter presents a design of microstrip filtering power divider for dual-band application. The proposed is based on the traditional Wilkinson and employs T-junction structures quarter-wavelength stepped impedance resonators (SIRs) to realise allocation bandpass response simultaneously. process simple effective. For validation, with centre frequencies 0.9 2.1 GHz GSM WCDMA applications designed, fabricated measured. measured results indicate that showcases low-loss characteristics, high...
We designed a terahertz bandpass filter based on double-layer frequency selective surface. Details of the proposed wave design and related parametric analysis are presented discussed. The was fabricated by laser technology. transmission spectrum characterized time-domain spectroscopy. results show that center is about 1 THz with 3-dB bandwidth 400 GHz.
This paper presents a novel class of multilayered ultra-broadband bandpass filters based on high-impedance slotline resonators. The equivalent circuit and electrical properties the proposed resonator realized low-permittivity substrate are first discussed. To largely remove radiation losses devised resonator, two identical shunt-connected folded low-impedance sections utilized to replace one short-circuited section. Through synthesis design an microstrip-to-microstrip vertical transition,...
A class of angular-displacement microwave sensor based on a signal-interference transversal filtering section (TFS) with unequal-electrical-length paths is reported for the first time. It consists bi-path TFS composed two in-parallel transmission-line segments distinct lengths, which modified by adding rotational open-circuit-ended stub as rotor to curved stator one its line segments. In this manner, spectral positions transmission zeros, are produced in transfer function through destructive...
A class of symmetrical multilayered reflectionless wideband bandpass filters (BPFs) with shunt/in-series resistively terminated microstrip lines are presented. Based on a microstrip-to-microstrip vertical transition and two shunt multisection lines, BPFs that feature broadband behavior first discussed. Subsequently, by increasing the number cascaded stages in improvement both passband amplitude flatness for this kind absorptive is demonstrated. Next, to avoid cross-coupling effect appearing...