SU1561131A1 - Super high frequency shaper of frequency marks - Google Patents

Abstract

This invention relates to a microwave technique. The purpose of the invention is to reduce the width of the spectrum of frequency labels. The former contains a waveguide circulator 1, made on the basis of a T connection with arms 2–4, waveguide filters 5 and a matched load 6. A microwave signal arriving at arm 2 passes into arm 3, and the reflected part of it is directed to output arm 4. Filters 5, fully fenced, at certain frequencies reflect the microwave signal and at these frequencies the microwave signal arrives at the arm 4. At the remaining frequencies, the microwave signal passes into the matched load 6 and does not arrive at the shoulder 4. Number of frequency marks determined by the number of filter 5. The goal is achieved due to the realization in filters 5 of a narrow width of the spectrum with a high slope of ramps of its frequency response, as well as due to the additional suppression of spurious signals at the harmonics of the fundamental frequency at which the frequency marker is formed. 1 il.

Description

The invention relates to the SECH technique and can be used in the construction of frequency selective devices.

The purpose of the invention is to reduce the width of the spectrum of frequency labels.

The drawing schematically shows the structure of a microwave frequency tag maker.

The microwave shaper of frequency marks contains a waveguide circulator 1, made on the basis of a T-junction, the first 2 and second 3 arms of which lie on the same straight A-A, with the first shoulder 2 being the input, the third shoulder 4 being the output, and the second arm 3 is connected to a cascade waveguide filters 5, the last of which is connected to the matched load 6. Waveguide filters 5 are band-blocked.

Microwave shaper frequency labels works as follows.

The microwave signal arriving at the first arm 2 of the waveguide circulator 1 passes to its second arm 3, and the reflected part of the microwave signal is directed to the third arm 4 (output). Due to the fact that the waveguide filters 5 are band-suppressed, they reflect the microwave signal at certain frequencies. At these frequencies, the microwave signal is fed to the third arm 4 (output). At the remaining frequencies, the microwave signal passes to the matched load 6 and does not flow to the third arm 4 (output).

The number of frequency marks is determined by the number of waveguide filters 5:

The width of the spectrum of frequency marks is reduced due to the fact that in waveguide filters 5, which are made by blocking, it is easier to realize a narrow width of the spectrum with a high slope of frequency response and due to the fact that in waveguide circulator 1 on the basis of a T-shaped connection with the described orientation The first (input) arm 2 and the second arm 3 additionally suppress spurious signals at the harmonics of the fundamental frequency at which the frequency marker is formed.

Claims (1)

Invention Formula A microwave frequency tag former that contains a WAVEAR-wide circulator, the first arm of which is an input and the third arm, a waveguide filter connected to its second arm, and a matched load, characterized in that, in order to reduce the width of the spectrum of the frequency marks, an additional charge is introduced - waveguide filters connected cascade between the waveguide filter and the matched load, the waveguide filters are band-suppressing and their number is equal to the number of frequency marks, and the waveguide circulators op is formed on the basis of T-compound, the first and second arms which lie on the same axis.