OOIR: Observatory of International Research

Papers

(The TQCC of Microwave and Optical Technology Letters is 2. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-11-01 to 2025-11-01.)

Article	Citations
A millimeter‐wave broadband power amplifier with a tree‐like transistor structure using 0.15‐μm GaAs technology	51
Bandwidth improvement of differential‐fed patch antenna with out‐of‐band rejection using SISL technology	43
A dual‐band dual‐polarized shared‐aperture SIW slot antenna array with beam scanning	36
High Scanning Rate Leaky‐Wave Antenna Using Mixed Cross‐Coupling Sections	31
A Wideband Circularly Polarized 2 × 2 Patch Antenna Array	26
2‐D Scanning‐Angle Expansion of Phased Array Antenna Using Metalens	23
A novel probe‐fed directional dielectric resonator antenna for mobile communication	22
Synthesis of Half‐Wavelength Dipole‐Based Plane Wave Generator With Consideration of Mutual Coupling Effects	22
Taperedpost‐wallslotline antenna loaded with dielectric lens forshort‐pulseapplications	21
A 1 THz Schottky transceiver front‐end based on 5 μm GaAs monolithic membrane	19
Broadband Circularly Polarized Metasurface Antenna Based on Characteristic Mode Analysis	18
Parasitic element loaded efficient electrically small antenna for indoor wireless applications	18
A Radar Path Loss Prediction Method for Nearshore Wind Farm Environments	18
A 100 GHz Switched Beam Patch Antenna Array With 4 × ${\boldsymbol{\times }}$ 4 Butler Matrix Based on Metallic‐Nanowire‐Filled Membrane	18
Compact frequency‐reconfigurable circular patch antenna with varactor diode: Design, tuning, and compactness optimization	17
Bistatic RCS Pattern Synthesis With a Receiver–Transmitter Metasurface and a Phase Distribution Optimization Algorithm	17
Detection of defects in composite insulators based on laser‐induced plasma combined with machine learning	16
Low‐cost and easy‐to‐embed 7‐bit 360° phase shifter with transitions for large‐scale phased arrays	16
A frequency reconfigurable microstrip antenna with radiation and scattering state switching	14
A novel method for obtaining gamma precoding values	14
A Novel Filtering Dielectric Resonator Antenna With Enhanced Gain	14
A Novel Dual‐Beam mmWave Filter‐Antenna With Wide Azimuth Beam for 5G Communication Systems	14
A high‐efficiency power amplifier by using harmonics control	13
An Ultra‐Wideband GaN PA MMIC With High‐Efficiency	13
An impedance matching section based on composite right/left‐handed transmission line model in viewpoint of phase shift and noise figure	13

Design of high‐efficiency broadband power amplifier based on split‐ring resonator input matching network	13
A Meander Line Integrated Rectangular Tri‐Band Antenna for 5G Sub‐6GHz Applications	13
Compact Dual‐Band and Dual‐Circularly Polarized Stacked Antenna With Capacitive Feeding	13
Design of Tri‐Band Doherty Power Amplifier Using Phase and Impedance Constrained Optimization	13
Isolation enhancement of distinct element dual polarized compact MIMO antenna for 5G/WLAN application	12
Miniaturized coplanar waveguide‐fed metamaterial inspired antenna for radio frequency identification applications	12
A novel single‐layer dual‐band circularly polarized metasurface antenna for maritime communications	12
Voltage‐controlled attenuator based on PIN diode and compensated gold wire inductors	12
Issue information	12
Novel FR4‐based low loss reconfigurable filter with four operating modes using movable transmission lines	12
Novel input impedance analysis of differential feed microstrip antennas using the bi‐characteristic‐impedance transmission line (BCITL) model	12
Data driven surrogate modeling of horn antennas for optimal determination of radiation pattern and size using deep learning	11
Design of 3×3 Nolen Matrix With Integrated Filter Function	11
A Novel Approach for Breast Cancer Detection Using Low‐Cost Textile Antennas	11
An indirect wireless electromagnetic measurement of flow velocity by an SRR‐based sensing method	11
A compact circular polarized patch fractal antenna for global navigation satellite systems	11
APD–SSPP: Enhancing Linearization of Power Amplifier Using Spoof Surface Plasmon Polariton Propagation	11
Design of a Low‐Noise Amplifier With Highly Efficient Sub‐Harmonic Suppression Based on a Self‐Biasing Adaptive Filter for Nonlinear Radar	11
Noncontact Young's Modulus Measurement Using a Laser Interferometry–Digital Microscopy System: From Manganese Steel to Polylactic Acid Composites	11
High isolation and high power of 0.13 µm CMOS SPDT switch using deep‐N‐well transistors and floating‐body technique in K‐band	11
Compact filters based on dual‐mode gap waveguide cavities and 3D printing technology	11
A dual‐band dual‐sense circularly polarized antenna based on chiral structure	11
Simultaneous measurement of ammonia and ethylene using hollow waveguide‐based wavelength modulation spectroscopy with a 9.56 μm quantum cascade laser	11
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MIMO antenna performance with isolator	11
Design of compact balanced filters with wide DM upper stopband and CM rejection band based on semi‐circular patch	10
Improved structure for the dissipative soliton generation based on nonlinear polarization rotation effect	10
A compact 5G band N77 bandpass filter with multiple zeros based on GaAs integrated passive device process	10
Inverse design of reflective metasurface antennas using deep learning from small‐scale statistically random pico‐cells	10
Design and fabrication of rudimentary shaped and effective 1 × 2 printed MIMO antenna using low profile material for WLAN and satellite applications	10
Optimization of partially thinned subarrays based on two‐stage random search method for large phased array antenna	10
Comparison of spectral beam combining based on reflecting volume Bragg grating, with and without collimating lenses	10
A wideband parallel‐plate waveguide design for FSS/FSR measurement	10
Resistive‐reactive class‐X power amplifier with bandwidth beyond one octave	9
High‐gain high‐selectivity TE20‐mode SIW‐fed metasurface filtenna array for 5G millimeter‐wave applications	9
Synergizing meander line and heterogeneous composite for miniaturized hybrid microwave absorber	9
A Universal High‐Gain Low‐Profile All‐Dielectric Lens Design Method for Feed Antennas	9
A Wideband High Gain Transmit‐Array Antenna Exploiting Polarization‐Rotated Metasurface Cell	9
An in‐band full‐duplex antenna for 2.4 GHz WLAN using differential‐feed based neutral coupling for isolation enhancement	9
Single Longitudinal Mode 2081 nm Thulium Doped Fiber MOPA Laser With Free‐Space Design	9
Analysis of antenna arrays using equivalent sources for increase in computational efficiency for 5G and beyond	9
Research on etalon‐free CO₂ measurement based on direct absorption signal fitting	9
Design and simulation of reference voltage sources circuit in lasers	8
Compact metal‐printed filtering antenna with wideband performance	8
MZI interferometric fiber optic temperature sensor based on MFC	8
A Compact and Continuously Tunable 360° Phase Shifter Using Cascaded Transformer‐Based 180° Reflection‐Type and Switched‐Type Phase‐Shift‐Cell	8
DDD coil design for wireless charging of unmanned aerial vehicles	8
A lighter weight substation infrared defect detection algorithm combining de‐weighted feature fusion and loss function fusion	8
Low‐profile frequency selective surface with quasi‐elliptical bandpass response using antenna‐filter‐antenna approach	8
Dual‐band MIMO antenna decoupling using vias based multipath decoupling circuit	8

A broadband intermodulation reference generator based on artificial nonlinear dipole	8
Integrated liquid–liquid percentage determination microwave sensor exploiting single‐frequency transmission amplitude measurement technique	8
Ultrawideband 3‐D printed aperture‐shared conformal dual‐horn antenna	8
Miniaturized methane detection system based on photoacoustic spectroscopy	8
A Wideband Profile‐Reduced Transmitarray Antenna Based on Phase‐Shifting Elements	8
Issue information	8
Issue information	8
Enhancing the measurement range of laser speckle systems	8
A 31–36 GHz low noise‐variable gain amplifier with less than 0.37° RMS phase error and 0.4 dB gain step in 65‐nm CMOS	8
On‐chip triplexer using series‐first structure for connecting radio frequency modules in a 65 nm CMOS	8
Wideband radar cross section reduction of a circularly polarized antenna using polarization conversion metasurfaces	8
A high gain uniplanar end‐fire electrically small antenna with a spilt‐ring resonator loading	8
Special issue on “Developments in the design of THz components for flexible electronics”	7
Oxygen detection system based on TDLAS–WMS and a compact multipass gas cell	7
Reconfigurable circularly polarized antenna with frequency agility	7
A physical‐based model for on‐chip double‐layer spiral inductors with a ground shield	7
Incident Angle Insensitive Focus Reconfigurable Reflective Metasurface Based on Polarization Control	7
Analysis and design of a wide stop‐band and high out‐of‐band suppression BPF	7
Design and application of D‐band bandpass filter based on 0.18 μm complementary metal oxide semiconductor process	7
Multiobjective Synthesis of Ultra‐Wideband Array Antennas in the Time Domain With High‐Power Pulse	7
Reflector‐based highly isolated dual‐polarized multibeam antenna	7
Spatially tunable and self‐healing plasmonic Talbot imaging by using periodic metal nanopore arrays	7
Development of a metamaterial‐based compact applicator for hyperthermia	7
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A Narrowband Bandpass Filter With Wide Stopband Using Mixed Lumped and Distributed Circuits	7
Design of Photonic Crystal All‐Optical Analog‐to‐Digital Using Nonlinear Kerr Effect	7
A self‐quadruplexing antenna for quad‐band wireless applications	7
Solid materials characterization using split ring resonators enclosed by power divider	7
A 25 Gb/s burst‐mode TIA+CDR optical receiver with 4.5 ns total reconfiguration time	7
High isolation 4‐port MIMO sloted antenna for Sub‐6 GHz wireless applications	7
Rapid detection and identification of rocks and minerals by laser‐induced breakdown spectroscopy	7
Inverse design of multiparameter antenna using hybrid machine learning‐driven training dataset	7
A dual‐band tightly arranged multiple‐input multiple‐output antenna pair for 5G mobile terminals	7
A Gradient Structure With Lattice Cores for Wide‐Band and Wide‐Angle Wave Transmission	7
Characterization and Compensation of Nonideal Effects of Modulation Functions in Time‐Modulated Array for Direction‐of‐Arrival Extraction	7
An Extremely Low‐Profile Wideband Patch Antenna for 5G Smartphones	7
Flat top coverage pattern maintaining via boundary subarray elements thinning	7
The single‐wavelength 561 nm laser based on reflective volume Bragg grating	6
A 5.91–8.94GHz phase‐locked loop in 65 nm CMOS for 5G applications	6
Using intrinsic‐resonance of an interdigitated microwave capacitor for detecting glyphosate‐based herbicide in water	6
Design of a compact magneto‐electric dipole antenna	6
High Q‐factor anapole mode based on localized spoof surface plasmon polaritons	6
Oxygen detection based on Faraday modulation spectroscopy and wavelength modulation spectroscopy: A comparison	6
Low‐profile and broadband microstrip antenna with pattern diversity	6
Broadband Omnidirectional Filtenna With Controllable Radiation Nulls and Bandwidth	6
Tunable dual‐band filter based on monolayer black phosphorus	6
Synthesis of sparse square arrays with high beam collection efficiency under minimum element spacing constraints	6
Compact groove‐loaded rectangular horn with equal dual‐polarization elliptical beams for reflector antenna application	6
Broadband circularly polarized filtering patch antenna based on metasurface	6
High‐Performance Compact 48‐Channel Arrayed Waveguide Grating on Improved Silica Platform	6
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Employing inverse Class‐E power amplifier series output filter in parallel Doherty power amplifier	6
An elliptical‐shaped rectangular slot antenna at 2.48 GHz for hyperthermia application	6
A reconfigurable phase gradient metasurface antenna for beam steering	6
Dot‐shaped transmit beamforming with nonuniform time‐modulated concentric circular frequency diverse array	6
A compact design of a wideband millimeter‐wave Butler matrix using integrated passive device technology	6
A 24.25–30 GHz radio frequency up‐down converter with harmonic distortions rejection for 5G millimeter wave radio channel emulator applications	6
Performance comparison of different deconvolution methods on 2D terahertz imaging	6
An ultra‐wideband MIMO system with multi‐loop mode for full‐screen smartphone applications	6
Dual‐band full‐duplex antenna with high isolation using differential fed and dual‐polarization	6
A wideband isolation technique using bezel coupled T‐type isolator for smartwatch MIMO applications	6
High birefringence and near‐zero dispersion control of nonlinear photonic crystal fibers with a double‐cladded coaxial core	6
Microstructured optical beams with azimuthal polarization in stratified absorbent media	6
Issue information	6
A novel algorithm of the perfectly matched layer based on the Runge–Kutta method of order 2 accuracy	6
Compact filtering magic‐T using a hybrid microstrip‐cavity structure	6
Wideband 3D‐printed dielectric reflectarray in Ka‐band	6
Novel design of high isolation compact printed monopoles array for dual‐band application	6
Silver sulfide as Q‐switcher and mode‐locker in Erbium‐doped fiber laser cavity	6
Impact of impedance compensation structure in coaxial‐microstrip transition section on near‐field radiation	6
Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure	6
Design of modulated signal waveform in fully digital programmable optical frequency comb	5
Wideband second‐order bandpass frequency selective surface with high selectivity	5
Polarization‐Reconfigurable Multi‐Antenna for High Mutual Coupling Reduction Using Backload Parasitic Structure	5
Design of novel compact SISL filters with multiple TZs based on patch resonators	5
An FSS structure with a band‐stop performance for UWB applications	5
High‐gain and wideband differentially fed circularly polarized planar aperture antenna	5
High‐performance balanced dual‐band bandpass filter with controllable bandwidth and frequency ratio	5
Design and characterization of a minimized planar dual‐band MIMO circular ring antenna with high efficiency	5
Isolation improvement between two tightly coupled QMSIW MIMO antenna elements using spoof surface plasmon polariton structure	5

Optical 8‐ary phase shift keying modulation format generator based on three microring modulators	5
Inverse Design of an Ultra‐Compact Symmetric 3‐dB Optical Power Splitter Based on N‐ary Digital Pattern	5
Investigating the jamming effect of HPM with different frequencies on SDR	5
Erratum to A dual band compact circularly polarized antenna for GPS applications	5
A programmable solar‐powered radio frequency transmitter	5
Properties of a Lorentz correlated beam in uniaxial crystal	5
A moisture detection sensor for flour based on the gas in scattering media absorption spectroscopy	5
Analysis of C and S Trace Elements in Steel Using Orthogonal Preablation Dual‐Pulse Laser Induced Breakdown Spectroscopy	5
The spectral‐voltage calibration technology of multispectral pyrometers based on Gauss–Newton‐genetic algorithm method for nonsource temperature regions	5
Dielectric resonator used as radome and antenna: A new concept for large frequency ratio shared aperture antenna design	5
Active near‐infrared laser heterodyne system based on supercontinuum laser source for gas measurement	5
Low‐cost compact omnidirectional antenna for tri‐band Wi‐Fi 6E applications	5
A high magnetic field sensitivity PCF‐SPR sensor working in the near‐infrared wavelength band	5
Optimization of signal‐to‐noise ratio of laser heterodyne radiometer	5
Millimeter‐Wave Ultra‐Wideband Compact Wilkinson Power Divider Based on Auxiliary Resonance Network	5
Tin oxide as a Q‐switcher in an Nd‐doped fiber laser	5
2.5D Frequency Selective Surface for Polarization‐Insensitive Cross‐Polarization Conversion	5
Miniaturized circular microstrip antenna designed with quasiperiodic sector metamaterials	5
Comparative analysis of X‐band FSS fabricated by inkjet printing and conventional etching technique	5
Multilayer circular SIW cavity differential bandpass filter with wide‐stopband characteristics	5
Electromagnetic Illusion Device Based on Diffraction Neural Network	5
A review on photonic‐assisted dual‐chirp microwave waveform generation methods	5
Compact Filtering Microstrip Antenna With Enhanced Out‐of‐Band Suppression	5
Wide Stopband Bandpass Filter for 5G N79 Band Applications	5
Performance Analysis of Radio Frequency/Underwater Wireless Optical Communication System With Fog Conditions Based on NOMA	5
Millimeter micro‐coaxial beam steering array for high‐speed satellite communications	5
Design of resonant metasurface absorber using feed‐forward neural network	5
An opto‐electronic oscillator based on Fabry‐Perot stabilized dual‐wavelength fiber ring laser	5
Fabrications of electrically small hemispherical antenna	5
3D EM data‐driven artificial network‐based design optimization of circular reflectarray antenna with semi‐elliptic rings for X‐band applications	5
Issue information	5
Design of miniaturized 5‐elements array GPS microstrip antenna for anti‐jamming	5
Design of a multilayer absorber for ultra‐wideband radar cross section reduction	5
Design of compact dual‐core terahertz polarization beam splitter with broad bandwidth	5
Zinc oxide nanorods electronically controlled terahertz modulator	5
Optimized MSA DPD method for improving 5G multiband optical fronthaul performance	5
Ultrathin and conformal frequency selective surfaces bandpass filter to eliminate the 5G bands on radio altimeters	5
Miniaturized circularly polarized metasurface antenna based on characteristic mode analysis	5
Real‐Time Monitoring System for Stator and Rotor Temperature of Hydroelectric Generator Based on Fluorescent Optical Fiber Sensing	5
Investigation of isolation enhancement and tune‐ability in patch antenna arrays	5
Wideband filtering power dividers with/without notch band	5
Broadband CPW fed butterfly shape printed slot antenna	5
Design of TMLAA for the Utilization of Radiated Harmonic Beam Over Digital Modulation Schemes	5
Dual‐Band Shared Aperture Fabry–Perot Cavity Antenna With Beam Deflection	5
A Petal‐Shaped Four‐Port MIMO Antenna for 5G Mobile Communications	5
Beam‐squint rectified balanced antipodal Vivaldi antenna with sliced fins and quarter‐wavelength labyrinth director	5
A broadband single‐layer reflectarray antenna with split ring element	5
A high‐linearity LC‐VCO with combined MOS varactors and bulk‐biased PMOS varactors for gain variation compensation	5
A novel wideband compact circularly‐polarized metasurface antenna for modern vehicular communication systems	5
Ultrabroadband (DC–80 GHz) RF MEMS DC/capacitive load shunt switch	5
Probe distance error analysis for phased array calibration based on BTM	5
Nonreciprocity of thermal radiation in attenuated total reflection‐mediated optical waveguide	5
Field test of an enhanced LIPS to direct‐monitor the elemental composition of particulate matters in polluted air	5
Bandwidth improvement of patch antenna and array with out‐of‐band rejection based on SISL platform for 5G applications	4
Terahertz couplers based on branch lines and waveguide resonators	4
A broadband flexible microwave‐optical compatible absorber	4
A compact dual‐band frequency‐dependent impedance transformer using two resizable shunt stubs	4
A dual‐band dual‐polarization Fabry–Pérot resonator antenna	4
A wideband fully enclosed coaxial‐to‐substrate‐integrated waveguide transition and its applications in a 1‐to‐4 radial power divider	4
Q‐factor enhanced resonator biosensor optimized by adaptive genetic algorithm for glucose detection	4
X‐Band Air‐Filled Coaxial Bandpass Filter With Wideband Input‐Reflectionless Performance	4
Propagation of sine beam in uniaxial crystal orthogonal to optical axis	4
Additively Manufactured Reconfigurable Liquid Metal Monopole Antenna Using Reservoir‐Based Feed System and Pneumatic Control	4
Generation of bright‐dark Q‐switched pulse pair in thulium‐doped fiber laser cavity with titanium aluminum carbide absorber	4
Issue information	4
Dual‐Band Dual‐Circularly Polarized Aperture‐Shared Antenna Based on SIW for Millimeter‐Wave/Sub‐6 GHz Communication Applications	4
Design of Two‐Dimensional 90° Filtering Couplers Based on Combined 90° and 180° Couplers	4
Design of distributed impedance‐matching networks for ultra‐wideband low‐noise amplifiers	4
Design of monopulse antenna loaded with Fabry–Perot cavity	4
A dielectric‐loaded broadband single‐ and dual‐polarized slot antenna with low profile and low cross‐polarization	4
Balanced bandpass microstrip filter with high common‐mode rejection and extended stopband	4
Simulation analysis of a lidar performance for atmospheric temperature profile measurements based on the Fizeau interferometer and multichannel photomultiplier tube	4
A low‐power‐consumption massive MIMO scheme based on multibeam antenna array	4
A curved single‐layer FSS design for gain improvement of a compact size CPW‐fed UWB monopole antenna	4
A dual‐band dual‐polarized omnidirectional patch antenna for on‐body application	4
A high‐performance dual‐polarized corrugated horn for a compact antenna test range system	4
Quad‐Band Bandpass Filter Using Asymmetric Short Stub Loaded E‐Type Resonators	4
CMA‐Driven Polarization Purity Enhancement in Triangular Patch Antennas With Resonance Stability	4
Design and Rapid Optimization Procedure of a Compact Broadband Microstrip Diplexer for VHF/UHF Band	4
Ultrahigh sensitivity terahertz refractive index sensor based on four‐inscribed hole defect photonic crystal structure	4
A broadband circularly polarized e‐shaped patch antenna	4
Operation of a passively Q‐switched Tm:YAP laser with Ta₂NiS₅ as a saturable absorber	4
A novel modified Kock–Snowflake fractal MIMO antenna for 4G/5G UWB communication gadgets	4
Novel 6‐GHz/80.8% fractional bandwidth filtering power divider with ultra‐large coupling coefficient using air‐dielectric broadside‐coupled lines	4
Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications	4
Interference characteristics of leaking SF₆ on photoacoustic detection of dissolved C₂H₄ in transformer oil	4
Polyester‐based wearable bandpass microstrip filter	4
Issue information	4
A three‐state diplexer design using stub‐loaded resonator pairs	4
Bandwidth‐reconfigurable filtering phase shifters with phase‐slope alignment for different bandwidth states	4
Verification of the shaped beam feed for high aperture usage efficiency single offset parabolic reflector compact antenna test range	4
A broadband and high‐efficiency folded transmitarray antenna	4
Compact Self‐Biased Millimeter‐Wave Circulators With Fishbone‐Shaped Junction	4
Coupling analysis of polytetrafluoroethylene dielectric waveguides in the sub‐THz band	4
Research on temperature and pressure interference in photoacoustic spectroscopy gas detection	4