The solution for tho far field diffraction by a slit in a thick conducting screen is utilized to find the scattering coefficients of a symmetric inductive waveguide diaphragm of finite thickness. The resulting equivalent circuit is employed to design a three cavity 0.5 dB pasaband ripple Tehebyseheff filter using thick waveguide diaphragms. The analytical results for the diaphragm and filter are shown to be in good agreement with numerical and experimental data. It is also shown that the diaphragm thickness can be effectively used as an additional design parameter and, with all other parameters fixed, the bandwidth decreases with increasing diaphragm thickness. Notes †Communicated by Professor M. A, K. Haniid. This research was supported by the National Research Council of Canada, under Grant A-3326, and the Defence Research Board of Canada, under Grant 3801-42.
The diffraction of a plane electromagnetic wave by a slit in a conducting screen of finite thickness is investigated using the Wiener-Hopf and generalized matrix techniques. For purposes of the analysis, the diffraction by two identical semi-infinite parallel-plate waveguides forming a tandem slit configuration is treated first in order to determine the interaction between the open ends of the wav...
The concept of waveguides and resonators operating at higher order modes is employed in the design of new microwave heating applicators where the available power is concentrated mainly in the region occupied by the product being processed. The results of a feasibility study carried out over a circular cylindrical waveguide resonator operating in the TM115 mode are presented.
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation S. C. Kashyap, M. A. K. Hamid, N. J. Mostowy; Diffraction Pattern of a Slit in a Thick Conducting Screen. Journal of Applied Physics 1 February 1971; 42 (2): 894–895. https://doi.org/10.1063/1.1660127 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioJournal of Applied Physics Search Advanced Search |Citation Search
The solution for the far field diffracted by a slit in a thick conducting screen is utilized to find the scattering coefficients of a thick inductive diaphragm in a rectangular waveguide. The analytical results are shown to be in good agreement with numerical and experimental data.
The application of the angular spectrum of plane waves, previously shown by Robinson, and Hamid for the problem of mode propagation in a rectangular waveguide loaded with a single E plane dielectric slab, is extended to an arbitrary number of slabs. The technique employs ray optics and residue calculus and is developed to the point where considerable theoretical advantages are evident when dealing...
Richter, Diament and Schlesinger's perturbation analysis is applied to deal with rectangular waveguides loaded with one or more dielectric slabs. It is shown, contrary to Richter's conclusion, that the theory can lead to reasonable results even in the situations where it was predicted to fail.
A method is presented for the detection and control of insects in samples of wheat and flour. Experimental arrangements are described for evaluating the scattering coefficients, dielectric constant and loss tangent of wheat and flour at 10 GHz. These results are presented in graphical form and used in the design of equipment for testing penetration and mortality at 2.45 GHz. It is shown that the moisture content in wheat drops by less than l% for exposure times greater than that corresponding to total mortality of three common types of wheat insects (Tribolium confusum, Sitophilus granarius and Cryptolestes ferrugineus). Finally it is concluded that the illumination of bulk wheat by micro-wave power is not adequate for practical treatment unless the infested wheat is circulated in a region of high electric field. Notes* Presented at the 1968 Symposium on Micro- wave Power, Boston, Massachusetts, March 22, 1968, paper E4. Final manuscript received June 21, 1968.
