Main Article Content
In this paper, characteristics of energy tunneling channel between the waveguides geometrically separated by a coaxial cable are studied. The novel aspect of design is use of coaxial channel to connect the waveguides while maintaining the energy tunneling phenomena. As anticipated the tunneling frequency depends upon the length of wire inside the waveguide and the length of the coaxial cable. The tunneling frequency also depends upon the dielectric constant of the material inside the waveguide and coaxial cable. At tunneling frequency the field strength (E and H) in the channel is extremely high, making the channel extremely sensitive to small change in permittivity of dielectric occupying the channel. The advantage of the proposed design is, its ability to tune to desired tunneling frequency just by changing the length of the coaxial cable without the need to redesign the waveguide height to accommodate the long tunneling wires. This structure can be used as dielectric sensor both for solid or liquid dielectrics just by placing the sample in coaxial cable cavity, contrary to previously report work where the sample has to be placed inside the waveguide.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
A. Alu and N. Engheta, "Light squeezing through arbitrarily shaped plasmonic channels and sharp bends," Phys. Rev. B, vol. 78, p. 035440, Jul. 2008.
A. Alu, M. Silveirinha, and N. Engheta, "Transmission-line analysis of epsilon-near-zero (ENZ)-filled narrow channels," Phys. Rev. E, vol. 78, p. 016604, Jul. 23, 2008.
M. G. Silveirinha and N. Engheta, "Theory of supercoupling, squeezing wave energy, and field confinement in narrow channels and tight bends using nearzero metamaterials," Phys. Rev. B., vol. 76, no. 24, p. 245109, Dec. 2007.
Omar Siddiqui, Mani Kashanianfard and Omar Ramahi,"Dielectric Sensors Based on Electromagnetic Energy Tunneling" Sensors, 15, 7844-7856, 2015.
A. Nauroze1, O. Sidiqui, R. Ramzan, and O. Ramahi, "Dielectric Sensing based on Energy Tunneling in Wireloaded Microstrip Cavities" META'13, 18–22, Sharjah , UAE, March 2013.
O. F. Siddiqui and O. M. Ramahi, "Frequency-selective energy tunneling in wire-loaded narrow waveguide channels," PIER, Letters, Vol. 15, 153-161, 2010.
Alu A.-Young-M.E. Silveirinha M.-Engheta N. Edwards, B. "Experimental veri_cation of epsilon-near-zero metamaterial coupling and energy squeezing using a microwave waveguide," Physical Review Letters, 100(3), 2008.
R. Ramzan, O. Siddiqui, A. Nauroze, and O. Ramahi," Microstrip Probe Based on Electromagnetic Energy Tunneling for Extremely Small and Arbitrarily Shaped Dielectric Samples" IEEE antennas and wireless propagation letters, vol. 14, 2015.
M. Kashanianfard, "Electromagnetic Wave Transmission through Sub-wavelength Channels and Bends Using Metallic Wires, M.S. thesis, Dept. Elect. And Comp. Eng., Univ. of Waterloo, Waterloo, Ontario, Canada, 2009.