scholarly journals Low-Loss and Light Substrate Integrated Waveguide Using 3D Printed Honeycomb Structure

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 402
Author(s):  
Yeonju Kim ◽  
Manos Tentzeris ◽  
Sungjoon Lim
Keyword(s):  
Polylactic Acid ◽  
Insertion Loss ◽  
Honeycomb Structure ◽  
Light Weight ◽  
Substrate Integrated Waveguide ◽  
Low Loss ◽  
Additional Advantage ◽  
3D Printed

This article proposes a low-loss and light 3D-printed substrate-integrated waveguide (SIW). Despite the use of lossy polylactic acid (PLA) material, insertion loss is reduced, and bandwidth is increased due to a honeycomb substrate similar to air. To demonstrate the proposed concept, we fabricated microstrip-fed SIWs with solid PLA and honeycomb substrates, and compared their performance numerically and experimentally. Average measured insertion loss from 3.4 to 5.5 GHz for the honeycomb SIW is 1.38 dB, whereas SIW with solid PLA is 3.15 dB. Light weight is an additional advantage of the proposed structure.

A Novel Wideband Transition between Waveguide and SIW

2013 ◽  
Vol 760-762 ◽  
pp. 174-177
Author(s):  
Yi Hong Zhou ◽  
Hai Yang Wang ◽  
Jia Yin Li
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Substrate Integrated Waveguide ◽  
Transition Structure ◽  
Low Loss ◽  
Ka Band ◽  
Low Insertion Loss ◽  
Better Than ◽  
Wideband Transition

Based on a linearly tapered antipodal finline, a novel low-loss wideband transition between waveguide and substrate integrated waveguide (SIW) is discussed. Results show that a low insertion loss (1.2-2.1dB) and a return loss better than 15dB across the entire Ka-band are obtained for a back-to-back transition structure.

scholarly journals A Ku-Band Low-Loss Traveling-Wave Power Divider using a Hollow Substrate Integrated Waveguide and Its Microstrip Transition

2020 ◽  
Vol 20 (2) ◽  
pp. 131-138
Author(s):  
Sung-June Hong ◽  
Min-Pyo Lee ◽  
Seil Kim ◽  
Jun-Su Lim ◽  
Dong-Wook Kim
Keyword(s):  
Insertion Loss ◽  
Traveling Wave ◽  
Return Loss ◽  
Power Divider ◽  
Wave Power ◽  
Substrate Integrated Waveguide ◽  
Low Loss ◽  
Power Combining ◽  
Via Holes ◽  
Ku Band

In this paper, we present a Ku-band low-loss traveling-wave power divider that uses a hollow substrate integrated waveguide (HSIW). For easy connection with microstrip-based devices and circuits, a low-loss transition between the microstrip line and the HSIW structure was implemented using C-cut via holes at the discontinuity interface, which reduces radiation and leakage effects and improves mismatch performance. To validate the performance of the transition, a back-to-back microstrip-to-HSIW transition was designed, fabricated, and measured from 12.5 GHz to 15.5 GHz. The measured results showed a return loss of 18 dB or more and an insertion loss of 0.5 ± 0.07 dB. An HSIW-based, low-loss 1:3 traveling-wave power divider was fabricated and measured from 13.5 GHz to 14.5 GHz. The power divider showed a return loss of at least 21 dB, an insertion loss of 0.57 ± 0.03 dB, and a power combining efficiency of 87.1%–88.3%.

Self-Sterilizing 3D-Printed Polylactic Acid Surfaces Coated with a BODIPY Photosensitizer

2021 ◽  
Vol 13 (10) ◽  
pp. 11597-11608
Author(s):  
Sol R. Martínez ◽  
Yohana B. Palacios ◽  
Daniel A. Heredia ◽  
Virginia Aiassa ◽  
Antonela Bartolilla ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
3D Printed

Fused Filament Fabrication 3D Printed Polylactic Acid Electroosmotic Pumps

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Liang Wu ◽  
Stephen Beirne ◽  
Joan-Marc Cabot Canyelles ◽  
Brett Paull ◽  
Gordon G. Wallace ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Polylactic Acid ◽  
Fused Filament Fabrication ◽  
Flexible Approach ◽  
Electroosmotic Pump ◽  
3D Printed ◽  
Electroosmotic Pumps

Additive manufacturing (3D printing) offers a flexible approach for the production of bespoke microfluidic structures such as the electroosmotic pump. Here a readily accessible fused filament fabrication (FFF) 3D printing...

scholarly journals Load Distribution on PET-G 3D Prints of Honeycomb Cellular Structures under Compression Load

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1983
Author(s):  
Olimpia Basurto-Vázquez ◽  
Elvia P. Sánchez-Rodríguez ◽  
Graham J. McShane ◽  
Dora I. Medina
Keyword(s):  
Fused Deposition Modeling ◽  
Structural Characteristics ◽  
Honeycomb Structure ◽  
Cellular Structures ◽  
Displacement Curve ◽  
Compression Tests ◽  
Compression Load ◽  
Fused Deposition ◽  
3D Printed ◽  
Printing Direction

Energy resulting from an impact is manifested through unwanted damage to objects or persons. New materials made of cellular structures have enhanced energy absorption (EA) capabilities. The hexagonal honeycomb is widely known for its space-filling capacity, structural stability, and high EA potential. Additive manufacturing (AM) technologies have been effectively useful in a vast range of applications. The evolution of these technologies has been studied continuously, with a focus on improving the mechanical and structural characteristics of three-dimensional (3D)-printed models to create complex quality parts that satisfy design and mechanical requirements. In this study, 3D honeycomb structures of novel material polyethylene terephthalate glycol (PET-G) were fabricated by the fused deposition modeling (FDM) method with different infill density values (30%, 70%, and 100%) and printing orientations (edge, flat, and upright). The effectiveness for EA of the design and the effect of the process parameters of infill density and layer printing orientation were investigated by performing in-plane compression tests, and the set of parameters that produced superior results for better EA was determined by analyzing the area under the curve and the welding between the filament layers in the printed object via FDM. The results showed that the printing parameters implemented in this study considerably affected the mechanical properties of the 3D-printed PET-G honeycomb structure. The structure with the upright printing direction and 100% infill density exhibited an extension to delamination and fragmentation, thus, a desirable performance with a long plateau region in the load–displacement curve and major absorption of energy.

The design of 3D printed polylactic acid (PLA) morphology with coating of chitosan

2020 ◽  
Author(s):  
Dyah Hikmawati ◽  
Siti Zulaihah ◽  
Aminatun
Keyword(s):  
Polylactic Acid ◽  
3D Printed
Sign in / Sign up

Export Citation Format

Share Document