SU1424078A1 - Apparatus for adding signals of different frequencies - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to reduce the signal loss. The signals at wavelengths A and D that go into the device to the corresponding segments of the rectangular waveguides, then go to segment 2 of the circular waveguide of the bridge device 1, Planes (R) polarization of these signals are orthogonal to each other and form with the plates 11 are angles 45. Under these conditions, half of the power of each of the signals A, and t, the direction of polarization which is parallel to the P plate 11, passes through a segment of a rectangular waveguide, a rectangular arm 13 and a circular arm 14, enters a segment 26 of a circular waveguide with half reflective structure. Another half of the power of signals A and D, the direction of which polarization is orthogonal to the P plate 11, passes into round arm 10 with plate 11, round arm 9 and enters segment 23 of a circular waveguide with a semi-reflective structure. Then, each of the signals D and A / j are divided into two halves, of which then total signals with linear polarization are formed. The same direction of polarization of the total signals A and d ensures their addition in the circular arm 31. 4 Il. (L (y;

Description

V,., J, f

ffu.f

The invention relates to radio engineering and can be used in waveguide paths for adding (dividing) signals of different frequencies.

The aim of the invention is to reduce the signal loss. FIG. 1 shows schematically a device for combining signals of various frequencies; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 1j in FIG. 4 - section bb In figure 1.

A device for adding signals of different frequencies contains a bridge device 1, made in the form of a segment of a circular waveguide 2, shorted from one end 3, and three segments of a rectangular waveguide 4, 5 .. and 6, circumferentially spaced around a circular waveguide 2 under an angle of 135 ° between the first segment of the rectangular waveguide 4 and the third com- square of the rectangular waveguide 6 and the second segment of the rectangular waveguide 5 and the third segment of the rectangular waveguide 6, the first polarization selector 7 having a rectangular arm 8, a circular shoulder 9, round shoulder 10 with plate 11, second polarization selector 12, having a rectangular shoulder 13, round shoulder 14, round shoulder 15 with a plate 16, first waveguide phase shifter 17, having a phase shifting element in the form of a short wall 18 with a quarter wavy plate 19, fixed on it at an angle of 45 to the rectangular shoulder 8, a second waveguide phase shifter 20, having a phase-shifting element in the form of a short-circuiting wall 21 with a quarter-wave plate 22 fixed on it at an angle of 45 ° to the rectangular shoulder 13, first A circular waveguide 23 cut with a semi-reflective structure made in the form of metal rods 24 and 25 located along the radii of the first segment of the circular waveguide 23 making an angle of 45 with a rectangular arm 8 metal rods 27 and 28 located along the radii of the second segment of the circular waveguide 26, constituting an angle of 45 with a rectangular arm 13, while the distance between the metal rods 24

25 (27, 28) is equal to (L1 + A,), where

Q

Q 5 d 5

0

A, | wavelengths corresponding to the average frequencies of the folding signals, the third segment of the rectangular waveguide 6 of the bridge device 1 is connected to the rectangular shoulder 13 of the second polarization selector 12, the end 29 of the segment of the circular waveguide 2 of the bridge device 1 is connected to the round shoulder 10 with the plate 11 of the first floor The selective selector 7, the round shoulder 15 with the plate 16 of the second polarizing selector 12 through the communication opening 30, which is formed therein, is connected to the rectangular shoulder 8 of the first polarizing selector 7, the circular arm 9 of the first polarization selector 7 is connected to the first segment of the circular waveguide 23 with a semi-reflective structure and the first waveguide phase shifter 17, the circular arm 14 of the second polarization selector 12 is connected to the second segment of the circular waveguide 26 with a semi-reflective structure and the second waveguide phase shifter 20. The first segment of the rectangular waveguide 4 and the second segment of the rectangular waveguide 5 are the inputs of the device for adding signals of different frequencies, and the segment of the circular waveguide 31 is its output house.

A device for combining signals of different frequencies works as follows.

Let the signals at the wavelengths D ,, A enter respectively the first segment of the rectangular waveguide 4 and the second segment of the rectangular waveguide 5. These signals then go into the segment of the circular waveguide 2 of the bridge device 1. The polarization planes of the signals A and D are orthogonal between and form with the plane of the plate 11 angles 45. Under these conditions, half the power of each of the signals A and A, the direction of which the plane of polarization is parallel to the plane of the plate 11, passes into the third segment of the rectangular waveguide 6, the rectangular arm 13, the circular arm 14 and enters the second segment of the circular waveguide 26 s semi-reflective structure. The other half of the power of the signals A and D, the direction of which the plane of polarization is orthogonal to the plane of the plate 11, passes into the circular arm 10 with the plate 11, the circular arm 9 and enters the first segment of the circular waveguide 23 with a semi-reflective structure. Let us now consider separately the passage of each signal D, and Aj, Signal /, with double passage (there and back) of the first segment of a circular waveguide 23 with a semi-reflective structure made in the form of metal rods 24 and 25 and the first waveguide phase shifter 17 with a quarter-wave plate 19 changes the direction of the polarization plane on the parallel plate 11, is reflected from

8 and through the communication opening 30 to the circular shoulder 15 and further to the circular shoulder 31 to the exit of the device. In this case, the plane of polarization of signal A coincides with the plane of plate 16. The first half of signal D ,, entered into circular arm 14 after double passage (back and forth) of the second segment of circular waveguide 26 with a semi-reflective structure made in the form of metal rods 27 and 27 and the second waveguide phase shifter 20 with a quarter-wave plastic 22, changes the direction of the polarization plane on the perpendicular plate 16 and passes B round arm 15 and round arm 31. Here, due to the equal paths for the first and second halves A signal occurs halves addition signal A, and mod mations summarioy

A linear signal, V with linear polarization, whose plane of polarization is an angle of 45 with the plane of plate 16. Similarly, the formation of the sum signal in the circular arm 31. To ensure the same direction of the polarization plane of the sum signals A, and L in the circular arm 31 From the shorting wall 18 to the middle of the distance between the metal rods 24 and 25, 1 is chosen where 1 is defined by the formula

1 0. 25f ,.

/ T j; / L 1

Similarly, the distance from the short-circuiting wall 21 to the middle distance between the metal rods 27 and 28 is chosen. The same direction of the plane of polarization of the total signals L, and At ensures their addition in the circular arm 31. If you give a total signal containing the wavelengths d, and AJ, round

the shoulder 31, it will be divided into the first segment of the rectangular waveguide 4 and the second segment of the rectangular waveguide 5.

Claims (1)

Formula of (ebreteni A device for combining signals of different frequencies, containing a bridge device, first and second polarization selectors, each having a rectangular shoulder and two round arms with a plate in one of them, first and second waveguide phase shifters having phase-shifting elements, first and second A segment of a circular waveguide with a semi-reflective structure, characterized in that, in order to reduce the signal loss, the bridge device is made in the form of a segment of a circular waveguide, shorted from one end, and three segments rectangular waveguide, located around the circumference of a circular waveguide at an angle of 133® between the first and third and BTOpbtM and the third segments of the rectangular waveguide, the phase-shifting element in the first and second waveguide phase shifters is made in the form of a short-closing wall with a quarter-wave plate fixed Noah on it at an angle of 45 to the straight the coal arm of the corresponding positioning selector, each semi-reflecting structure is made in the form of two metal rods arranged along the radii of a circular waveguide segment, which make an angle of 45 40 with a rectangular shoulder of the corresponding polarization selector, at a distance (L. + / one from the other, where D,, wavelengths corresponding to the average frequencies of the added signals, while the third segment of the rectangular waveguide of the bridge device is connected to the rectangular shoulder the second polarization selector, the other end of the segment of a circular 50 waveguide of the bridge device is connected to a round shoulder with a plate of the first polarization selector, a round shoulder with a plate of the second polarization selector through 55 the communication version, which is made in it, is connected to the rectangular shoulder of the first polarization selector, the round arms of the first and second polarization selectors are connected to the first and second segments of a circular waveguide with a semi-reflective structure and the first and second waveguide phase shifters, respectively, the first and second segments of the rectangular A (fH / 9.2 The first waveguide of the bridge device are the inputs of the device for adding signals of different frequencies, and the circular arm of the second polarization selector is its output. 6-6 in-in eleven ,but fjue.4