Results 51 to 60 of about 4,061 (210)
IET Microwaves, Antennas & PropagationA novel design method of dual‐band single‐layer substrate‐integrated waveguide (SIW) filtering antennas with independently controllable bands is proposed in this paper. The basic two‐pole dual‐band filtering antenna is proposed by a dual‐mode rectangular
Ke Gong +7 more
doaj +1 more source
Multimode/Multifrequency Low Frequency Airborne Radar Design
Journal of Electrical and Computer Engineering, 2013 This work deals with the design of multimode/multifrequency airborne radar suitable for imaging and subsurface sounding. The system operates at relatively low frequencies in the band ranging from VHF to UHF. It is able to work in two different modalities:
Sandra Costanzo +13 more
doaj +1 more source
Coplanar waveguide-fed ultra-wideband antenna with triple-band notched design
The Journal of Engineering, 2015 A novel coplanar waveguide-fed ultra-wideband antenna with triple band-notched function centred at 3.5, 5.5 and 7.5 GHz is proposed. It has small size of 26 × 26 mm^2.
Kun Zhao +3 more
doaj +1 more source
Age‐Dependent Correlation of Pulmonary Function Impairment and Aortic Arch Stiffness in Mice
Pediatric Discovery, Volume 4, Issue 1, March 2026.This study examined the relationship between aortic arch stiffness and lung function in aging mice. Multiple linear regression modeling showed moderate to strong correlations between the rise in aortic arch stiffness and changes in lung function as the mice progressively aged.
Ayman Isbatan +10 more
wiley +1 more source
A Crystalline Bismuth(II) Radical Anion: Synthesis, Characterization, and Reactivity
Angewandte Chemie, Volume 137, Issue 49, December 1, 2025.A T‐shaped Bi(III) trisamide featuring a sterically demanding NNN pincer ligand was prepared. The planarization of the Bi center furnishes a lowest unoccupied molecular orbital with distinct Bi(6p) orbital character which unlocks clean one‐electron reduction to afford a crystalline Bi(II) radical anion.
Sotirios Pavlidis +6 more
wiley +2 more sources
IET Microwaves, Antennas & PropagationThe design of three‐dimensional (3D)‐printed heterogeneous ceramics exhibiting isotropic and anisotropic dielectric permittivities at microwave frequencies is studied for dielectric resonator antenna (DRA) applications.
Bruno deAraùjo +5 more
doaj +1 more source
IEEE Access, 2019 A compact 3-dimensional dual-element, multiband antenna for Multi-Input-Multi-Output (MIMO) applications is proposed in this paper. Folding technique along with various impedance matching structures are employed for miniaturization and multiband ...
Rashid Saleem +5 more
doaj +1 more source
Ocean waves and turbulence as observed with an adaptive coherent multifrequency radar [PDF]
, 1984 An adaptive coherent multifrequency radar system is developed for several applications. The velocity distribution (Doppler spectrum) and spectral intensity of 15 different irregularity scales (waves and turbulence) can be measured simultaneously ...
Gjessing, D. T., Hjelmstad, J.
core +1 more source
Versatile High‐Sensitivity EPR Using Superconducting Spiral Microresonators
Small Methods, Volume 10, Issue 6, 24 March 2026.A significant sensitivity enhancement in conventional X‐band pulsed EPR is achieved using planar spiral microresonators fabricated from high‐temperature superconducting YBCO. Fully compatible with standard instrumentation, the approach enables high‐fidelity spin control under typical sample conditions.
Gediminas Usevičius +18 more
wiley +1 more source
The Journal of Engineering, 2016 In this study, simple and compact novel-shape planar monopole antenna for multi-band operation such as DCS, Bluetooth, and ultra-wide-band (UWB) is proposed. Proposed antenna comprises of circular ring with extended rectangular monopole antenna in one of
Vijay K. Sambhe +2 more
doaj +1 more source