SU1415280A1 - Frequency-selection device - Google Patents

Abstract

The invention relates to microwave technology and m. used in devices on dielectric waveguides. The purpose of the invention is to reduce losses at the operating frequency and increase the suppression of side frequencies. The device consists of a periodic dielectric waveguide 1, coiled into a ring, and an inserted dielectric waveguide 2. An electromagnetic wave propagates through the dielectric waveguide 2 at a working frequency without loss, since in a periodic dielectric waveguide 1, the antiresonance condition is satisfied. At the side frequencies in the periodic dielectric waveguide 1, oscillations are excited, which take energy from the electromagnetically coupled with it of the dielectric waveguide 2. Thus, side oscillations are suppressed. 1 il. (L

Description

The invention relates to a microwave technique and can be used in devices on dielectric waveguides.

The purpose of the invention is to reduce losses at the operating frequency and increase the suppression of side frequencies.

The drawing shows a frequency selection device.

The frequency selection device consists of a periodic dielectric waveguide 1, coiled into a ring, and a dielectric waveguide 2.

Periodic dielectric waveguide 1 is made in the form of alternating segments with lengths X / 4-y Е7 and Ej J where is the wavelength in free space, 6, and Е is the dielectric constant of these segments, respectively.

The device works as follows.

The electromagnetic wave propagates through the dielectric waveguide 2 at the operating frequency without loss, as in a periodic dielectric waveguide

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1, the antiresonance condition is satisfied. At the side frequencies in the periodic dielectric waveguide 1, oscillations are excited, which take energy from the electromagnetically coupled with it of the dielectric waveguide 2. Thus, side oscillations are suppressed.

Claims (1)

Invention Formula A frequency selection device containing a periodic dielectric waveguide, made in the form of alternating quarter-wave and half-wave segments, respectively, with smaller and larger values of the dielectric constant, characterized by the fact that, The waveguide is coiled into a ring of a length equal to an odd number of half-waves in a periodic dielectric waveguide, and a dielectric waveguide, an electromagnet, is introduced Itno associated with a periodic dielectric waveguide.