SU1707660A1 - For combining two frequency ranges - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to expand the working frequency ranges. The device for combining two ranges of parts contains a segment of a circular waveguide 1. To which, through a two-stage transition 2, a selector of orthogonal polarizations 3 is connected, the segments along a circular die guide 4-7, one ends of which are connected to communication windows 8G placed on the transition wall 2 evenly around the circumference, and the other ends of the segments 4, 6 and 5, 7 are connected respectively to the symmetrical arms of the N-tees 9 and 10. Each notch filter of the upper frequency range (VDCH) is made in the form of eight L-shaped vibrators 12 VDCH length, Ai / 4 where At is the average wavelength of the HDD installed four on each wide wall of the window 8. And the notch filter of the lower frequency range (NDCH) is made in the form of four L-shaped vibrators 13 NDCH long, Yag / 4, where AZ is the average wavelength NDCH installed on the end of the stage 11 of a smaller diameter evenly around the circumference. Due to the presence of the transition 2 and the mutual arrangement of the L-shaped vibrators 12 and 13 with it, the working frequency bands of the lower and higher frequencies are expanded. 1 il. Co C N o vi; CN o o

Description

The invention relates to radio engineering and can be used in microwave paths of satellite communication lines.

The purpose of the invention is to expand the working frequency ranges.

The drawing shows the device, a general view.

A device for combining two frequency bands contains a segment of a circular waveguide 1, to which a selector 3 of orthogonal polarizations is connected through a two-stage transition 2, segments 4-7 of a rectangular waveguide, one ends of which are connected to notch filters of the upper frequency range, which are connected to communication windows 8 placed on the wall of the two-step junction 2 evenly around the circumference, and the other ends of the segments 4, 6 and 5. 7, about the waveguide, are connected respectively to the symmetrical arms of the H-tees 9 and 10, while The narrow walls of the 4–7 rectangular waveguide segments coincide with the end face of the tread 11 of smaller diameter,

Each notch filter of the upper frequency range is made in the form of eight L-moded vibrators 12 of the upper frequency range of length lt / -1, where AI is the average wavelength of the upper frequency range set by four per g of each wide wall of the communication window 8 and oriented ends inside segments 4–7 of the rectangular waveguide, and the notch filter of the lower frequency range is made of B in the form of four L-shaped links of the lower frequency range set at the end of the smaller diameter stage 11 evenly around the circumference and the orientation ontsami towards solektogz 3 cp: or; -a.i GOVERNMENTAL polarizations.

The device is of two ranges from one hour to the slave Göpud. In an apparent way.

Signals de, di Ј.Ј: anger. for example, from an antenna, come into a segment of a circular waveguide 1. Signals of the low-frequency range are often reflected from low-frequency G-vibrators 13, which are resonant for wavelength Ar. and additionally from the selector 3 of orthogonal polarizations, which is beyond the limits of wave Ar. and enter the communication windows 6 and further into segments 4-7 of a rectangular waveguide. After summation in the N-tees 9 and 10, the signals of the lower frequency range are sent to subsequent microwave devices.

G-shaped vibrators 12 of the upper frequency range have little effect on the signal of the lower frequency range, since

they are much smaller than the wavelength of the AZ and are connected to the field due to the G-shaped form of the vibrators. The upper frequency band signal does not enter segments 4–7 of the rectangular waveguide, as it reflects from the upper frequency l-shaped vibrators 12, which are resonant for the wavelength AI, and through a two-stage transition 2 enters the selector 3 orthogonal polarizations. G-types of vibrators 13 of the lower frequency range have little effect on the signal of the upper frequency range due to their G-shaped form, which provides a small connection

with field, and non-resonant size for wavelength Ai. The positive effect is that the extension of the working frequency ranges is ensured by the presence and mutual arrangement of the two-stage transition 2 and L-shaped vibrators 12 and 13 of the upper and

lower frequency bands.

Claims (1)

Claims of the Invention A device for combining two frequency bands containing a segment of a circular waveguide to which, through a junction, connect the orthogonal polarization selector, four segments of a rectangular wave I-1 o. some of the ends are connected concurrently with notch filters of the upper frequency range, connected to the communication windows located on the junction wall evenly around the circumference, and the other ends of each pair of rectangular waveguide segments located diametrically connected to the symmetrical shoulders of the corresponding H-tee. characterized in that, in order to expand the working frequency ranges, the transition is made by a two-step one and the narrow walls of the segments of a rectangular wave yes coincide with the end of the smaller steps diameter, each notch filter of the upper frequency range is made in the form of eight L-shaped vibrators of the upper frequency range of length Ai / 4, where Ai is among the upper wavelength range of four on each wide wall of the communication window and oriented ends inside the rectangular segment waveguide parallel to its axis and four L-shaped low-frequency vibrators A2 / 4 were introduced, where the average low-frequency wavelength, installed at the end of a smaller diameter stage, uniformly around the circumference and oriented with the ends toward the selector of orthogonal polarizations parallel to its longitudinal axis.