Embedded Bed of Nails With Robustness Suitable for Broadband Gap Waveguide Technology
- 7 October 2021
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 69 (12), 5317-5326
- https://doi.org/10.1109/tmtt.2021.3116178
Abstract
This article introduces a new type of contact-less electromagnetic bandgap (EBG) structure in the form of an embedded bed of nails. Compared with the traditional bed of nails structure, the smooth upper metal plate originally used to provide the perfect electrical conductor (PEC) boundary is replaced by periodic defect grooves, and the metal pins on the base block are embedded in these grooves without any electric contact. One of the advantages of the embedded EBG structure is that it has a robust tolerance for the height of the air gap. Therefore, this structure provides a cost-effective parallel plate mode suppression solution because it allows a low-precision manufacturing process level while maintaining the stability of the bandwidth. On the other hand, the proposed EBG structure can achieve a stopband range of several octaves. This characteristic makes it indeed suitable for wideband gap waveguides (GWs) to provide horizontal open boundaries. To verify the feasibility of the proposed approach, the new ridge gap waveguide (RGW) (with an embedded bed of nails) and the classic RGW (with a traditional bed of nails) with two 90° bends are designed, fabricated, measured, and compared. The experimental and simulation results are quite consistent and indicate that the embedded RGW has prominent advantages in bandwidth and robustness.Keywords
Funding Information
- National Natural Science Foundation of China (61921002)
This publication has 43 references indexed in Scilit:
- A Reconfigurable K-/Ka-Band Power Amplifier With High PAE in 0.18- $\mu$m SiGe BiCMOS for Multi-Band ApplicationsIEEE Transactions on Microwave Theory and Techniques, 2015
- Air-Filled Substrate Integrated Waveguide for Low-Loss and High Power-Handling Millimeter-Wave Substrate Integrated CircuitsIEEE Transactions on Microwave Theory and Techniques, 2015
- Microstrip-Ridge Gap Waveguide–Study of Losses, Bends, and Transition to WR-15IEEE Transactions on Microwave Theory and Techniques, 2014
- Minimizing RF Performance Spikes in a Cryogenic Orthomode Transducer (OMT)IEEE Transactions on Microwave Theory and Techniques, 2014
- Resemblance between gap waveguides and hollow waveguidesIET Microwaves, Antennas & Propagation, 2013
- Numerical studies of bandwidth of parallel-plate cut-off realised by a bed of nails, corrugations and mushroom-type electromagnetic bandgap for use in gap waveguidesIET Microwaves, Antennas & Propagation, 2011
- Design and experimental verification of ridge gap waveguide in bed of nails for parallel-plate mode suppressionIET Microwaves, Antennas & Propagation, 2011
- Design of Millimeter Wave Wideband Transition From Double-ridge Waveguide to Coaxial LineJournal of Infrared, Millimeter, and Terahertz Waves, 2010
- Construction of Green's functions of parallel plates with periodic texture with application to gap waveguides – a plane-wave spectral-domain approachIET Microwaves, Antennas & Propagation, 2010
- Definition of artificially soft and hard surfaces for electromagnetic wavesElectronics Letters, 1988