SU76553A3 - Ultra High Frequency Transmission Line - Google Patents

Description

The subject of the invention is a feeder line (waveguide) design for transmitting ultra low frequencies with low loss.

According to the invention, the transmission line is in the form of a hollow conductor with internal edges. Due to the presence of a gap between the ribs, a capacitance distributed along the length is formed.

The geometrical dimensions of the line are chosen such that there is a resonance in the current-carrying circuit, which has distributed capacitance and inductance, which ensures the maximum magnetic flux along the axis of the conductor.

In the symmetric arrangement of the line elements in it, resonance will occur at the same frequency, if unbalanced, each sector will be tuned to its own frequency and the line will be tuned to several frequencies. Such an asymmetrical line will behave like a bandpass filter and will allow to transmit a number of frequencies or a certain spectrum of them.

The invention is illustrated in the drawings, which show various embodiments of the proposed line.

FIG. 1 and 2 showed a line for transmitting ultra-high frequencies to a waveguide / containing two edges 2 and 3 with a gap in the middle. The ribs are bonded to the inner surface of the waveguide along its entire length by welding or soldering. Generator G is connected via a transformer T to the ribs on one side of the waveguide, the load Yas on the other side of it.

only 76553- 2 --- If the ribs are arranged not in diameter, but in accordance with the chord of the open section of the voliovod, i.e., make the geometrical dimensions of the two parts; its unequal, the line for transmitting ultra-high frequencies will be tuned to two different frequencies.

Changing the Interval between adjacent frequencies, you can get a different bandwidth of frequencies passed by the lily.

FIG. 3 shows the same structure, but with ribs having a height greater than the radius of the waveguide and partially overlapping each other.

FIG. Figure 4 shows the structure of a waveguide with one edge of great height; a distributed capacitance in it is formed between the end of the edge and the inner surface of the waveguide.

FIG. Figure 5 shows the waveguide structure, consisting of two tubular conductors} and 2, cut along a generator; the edges of the cuts are interconnected by two flat parallel bars 5 and 4, forming the feeder line. In this design, the strips 5 and 4 form a capacitance, and the inner surfaces of the pipes 1 and 2 are inductible. The source of vibrational energy can be connected to any symmetrical points located below and above the center line, and the load is connected in the same way to the other end of the waveguide. If such a structure is used as a bandpass filter, then one of the tubes can be made larger in diameter than the other, which will provide a system resonance at two frequencies.

FIG. 6, 7, and 8 show the design of waveguides in which three and four tuned circuits are applied.

The structure shown in FIG. 6, has four internal edges 2, 3, 4 and 5 located radially with respect to cylinder 1. If all quadrants are identical in size, the line resonates at the same frequency; if multiple resonance is needed, the quadrants can be made different.

FIG. 7 the interior of the line is divided into three sectors. This figure also shows one way to enable multiple lines. Generator D is connected at one end to the outer shell of the line, and at the other end through capacitors C, Ci and Cj to edges 2, 3 and 4. The generator can operate either at one frequency, or at several different frequencies, or, finally, give a whole range of frequencies , as, for example, in the transmission of television.

Figure 8 is generally similar to FIG. 5, except that there are three interconnected pipes that provide a three-hump resonance curve. The edges of the pipes 1, 2 and 3 are connected to each other in any of the possible ways, such as, for example, by soldering or welding, without using capacitive strips indicated in FIG. five; If desired, these slats can also be applied here.

FIG. 9 shows one of the possible methods for manufacturing the feeder line shown in FIG. 1 and 2. Two pipes / and 2, made in the shape of the letter C and having a cut along the generatrix, spans or welded on their sidewalls. A similar fabrication method can be applied to the structures shown in FIG. 3, 4, 6 and 7.

Nredmet of the invention

Claims (3)

I. Ultra-high-frequency transmission line, characterized in that, in order to more fully transfer high-frequency energy, it is made in the form of a hollow metal cylinder, along the inner generators of which along its entire length are fixed symmetrically at opposite ends of the cylinder diameter by welding or the spikes metal fins, to which the source of electrical energy and the useful load are connected, the diameter of the cylinder, the distance between the fins and the size of the air gap chosen so To the inductive reactance and the capacitive reactance of the cylinder gap to the currents flowing in the plane perpendicular to the cylinder axis, are mutually compensated. 2. The form of the device according to claim 1, characterized in that, in order to increase the width of the frequency band passed by the line, the ribs are located at the ends of the chord, passing through a section drawn perpendicular to the geometric axis of the cylinder. 3. A device change according to claim 1, characterized in that the transmission line is made in the form of two hollow metal pipes of the same or different diameter, along which forming a slit, the edges of which are connected, the edges of which are connected to the capacity of the line. Fi2.3