Results 121 to 130 of about 85,450 (309)
Concept for Continuously Tunable Output Filters for Digital Transmitter Architectures
IEEE Access, 2019 This paper presents a novel output filter approach for continuously frequency-tunable digital power amplifiers, suitable for future seamless and band-less applications in 5G, e.g. for cognitive radios (CR). The presented tunable output filter is based on
Christian Schuster +8 more
doaj +1 more source
Surface Plasmon Enhanced Photoluminescence of Carbon Dots Formed In Situ on Silver Gratings
Advanced Science, Volume 13, Issue 27, 13 May 2026.Carbon emitters formed in situ on a silver grating via plasmonic catalysis yield enhanced spontaneous emission by preferential radiative decay into surface plasmons. Enhancement manifests as emission exhibiting characteristics of coherence (polarization, directionality), and accelerated lifetimes of ∼30 ps, yielding Purcell factors of ∼70.
Maryam Sadat Amiri Naeini +5 more
wiley +1 more source
Microstrip Tunable Bandpass Filter with the Colinear Resonators
International Journal of Antennas and Propagation, 2013 This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode.
Z. P. Wang +3 more
doaj +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 3, May 2026.A new re‐crystallization strategy was employed to design a highly crystallized poly(heptazine imide) photocatalyst, achieving strong light absorption capacity, accelerated separation/migration of photocarriers, and enhanced proton extraction capability simultaneously.
Xiaojuan Zhi +11 more
wiley +1 more source
Highly Versatile Real‐Time Optical Noise Filtering Through Temporal Cloaking
Laser &Photonics Reviews, Volume 20, Issue 10, 22 May 2026.Conventional bandpass filtering strategies may be insufficient for recovering optical waveforms under extremely noisy conditions. We demonstrate a temporal‐cloaking denoising strategy enabled by the temporal Talbot effect, which concentrates the coherent signal of interest into short temporal slots while broadband noise remains temporally spread.
Majid Goodarzi +5 more
wiley +1 more source
Compact tunable bandpass filter with wide tuning range using ring resonator and short‐ended coupled lines [PDF]
, 2015 He Zhu, Amin Abbosh
openalex +1 more source
Laser &Photonics Reviews, Volume 20, Issue 10, 22 May 2026.A compact and low insertion loss programmable photonic circuit is demonstrated based on a 7‐cell hexagonal waveguide mesh with a large free spectral range (FSR) of 31 GHz for a 6‐gate ring resonator configuration. Vernier rings and a dual‐injected ring configuration are demonstrated on this circuit with a further improved FSR of 93 GHz.
Yu Zhang +6 more
wiley +1 more source
Small, Volume 22, Issue 28, 18 May 2026.A tri‐specific scaffold cell (TriSC) platform is engineered to enable programmable, reversible, and multiplex surface assembly through orthogonal and spontaneous coiled‐coil interactions. Independent targeting and therapeutic nanobodies are modularly recruited onto bacterial surfaces, allowing tunable combinatorial functionality.
Yong Joon Cho +3 more
wiley +1 more source
Ultra-wideband bandpass microstrip filter with electronically tunable notch-band
e-Prime: Advances in Electrical Engineering, Electronics and EnergyThis paper introduces a compact ultra-wideband (UWB) microstrip filter featuring both a fixed and an electronically tunable notch band. Operating within the frequency range of 3.27 GHz to 5.61 GHz, the filter incorporates a permanent notch at 4.08 GHz ...
Dattatray S. Bade, Sudhakar S. Mande
doaj +1 more source
A MINIATURIZED TUNABLE BANDPASS FILTER WITH CONSTANT FRACTIONAL BANDWIDTH [PDF]
, 2015 Liangzu Cao +3 more
openalex +1 more source