WAVEGUIDE

• Main Author: ITOU YUTAKA
• Format: Patent
• Language: English
• Published: 27.04.1984
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; TRANSPORTING; WAVEGUIDES

PURPOSE:To reduce the weight of a waveguide and to avoid a short circuit between devices connected by the waveguide via the waveguide and its supporting constitution by constituting the waveguide with a nonconductive material and coating the inner surface of the waveguide with a good conductor. CONSTITUTION:A tubular waveguide 1 which transmits electromagnetic waves and its connection flange 2 are made of an insulated material such as plastic, ceramics, glass, etc. A conductive coat 3 of a good conductor is provided consecutively on the inner surface of the waveguide 1 and a part of the flange surface. The coat 3 is formed by a dry process such as a vacuum vapor deposition process, an ion plating process, etc. The depth (d) of the coat 3 is defined, as d=(2omegasigmamu)<1/2>, where omega equals to 2pif, (f) equals to the frequency of an electromagnetic wave, sigma equals to the conductivity of the coat and mu equals to the permeability of the coat respectively. As a result, the internal leakage of electromagnetic waves is prevented for the waveguide 1 with the reduction of weight of the waveguide 1. Furthermore a short circuit is avoided between devices which are connected by the waveguide 1.