SU1411982A1 - High-frequency communication system - Google Patents

Abstract

The invention can be used for communication — on underground transport — and with subscribers, displaced in underground mining, and allows for increased reliability of communication between any transceiver. The high-frequency communication system contains a fixed transceiver 1, a symmetrical guide line (NL) 2 along which amplifiers 3 are distributed, mobile transceivers (W) 4 with bodies 5, terminating resistors 6. A two-wire NL physical circuit is used to transmit and receive information 2, through which Signals are transmitted, and its artificial circuit is a two line-to-ground drive, which is used as a guide system for propagating an electromagnet along it. waves. The presence of odd amplifiers has 3 balanced inputs and unbalanced outputs or unbalanced inputs and balanced outputs, and even amplifiers have 3 unbalanced inputs and balanced outputs or balanced inputs and unbalanced outputs, ensuring stable operation without self-excitation of each amplifier 3. Unbalanced inputs amplifiers 3 pick up signals from the nearest SHSh 4. Signals are amplified by this amplifier 3 and transmitted over both NL 2 along the physical and artificial NL 2, Not symmetrical outputs of amplifiers 3c using emitters 5 transmit signals to the nearest ШШ 4 and to an artificial NL 2 circuit. I Il. (C

Description

The invention relates to a high-frequency communication system and can be used to organize communication in underground transport and with subscribers moving in underground mines.

The purpose of the invention is to increase the reliability of communication between any transceivers. 10 ! The drawing shows a structural diagram of a system of high-frequency. COMMUNICATIONS.

The high-frequency communication system 'contains a fixed transceiver unit at' 15 chip 1, a guide line 2, amplifiers 3, mobile transceivers 4, emitters 5, matching resistors 6.

The high-frequency communication system operates as follows,

To transmit and receive information, the physical circuit of the two-wire guide line 2 and its artificial circuit are two wires of the line 25 - ground, the physical circuit is used to transmit signals directly along the wires of the line, and the artificial circuit is used as a guide system for 30 propagation along it electromagnetic waves.

The presence of odd amplifiers with three symmetric or unbalanced inputs and unbalanced or symmetric ^ 5 outputs, and with even amplifiers - three unbalanced or unbalanced inputs and, accordingly, symmetric or unbalanced outputs, ensures stable self-excitation of each operation without a 4θ amplifier

3. The gain created by the amplifiers compensates for the attenuation of the gain. signals in the physical and artificial circuits of the guide line 2. The gain is selected so that self-excitation of groups of amplifiers (in particular, the first and second, second and third amplifiers, etc.) cannot occur, for which the inputs and outputs are not different (they are either both symmetrical or both asymmetrical).

The final (non-zero) output impedance of the balanced outputs of the amplifiers prevents line shunting, which interferes with signal transmission.

The unbalanced inputs of the amplifiers 3 receive signals from the nearest movable transceiver 4. These signals are amplified by this amplifier 3 and transmitted along the guide line 2 to the left and right along its physical and artificial circuits.

. The unbalanced outputs of the amplifiers 3 by means of emitters 5 transmit signals to the nearest movable transceivers 4 and to the artificial circuit of the guide line 2.

After turning on the amplifiers 3, the presence of terminating resistors 6 from both circuits of the guide line 2 ensures the propagation of signals along two parallel matched circuits and a mode close to that of a traveling wave.

This reduces the attenuation of the signal during its propagation along the guide line 2, which reduces the number of amplifiers 3 with the same length of the guide line 2 and, therefore, improves the reliability of communication. :

Claims (1)

Claim A high frequency communication system comprising a fixed transceiver 'connected to a guide line along which amplifiers with finite output impedance are distributed, and movable transceivers with emitters, is different. the fact that, in order to improve the reliability of communication between any transceivers, the guide line is symmetrical and loaded on a matching resistor, the first and subsequent odd amplifiers are made with symmetric or unbalanced inputs and, respectively, unbalanced or symmetric outputs, even amplifiers with unbalanced or symmetric inputs and respectively with symmetric or unbalanced outputs, and the symmetric inputs and outputs of the amplifiers are connected to the wires of the guide line, and hexadecimal inputs and outputs connected to usililiteley disposed directly about one guide line emitters and a common bus, each wire start and end of the guide line through the termination resistor is connected to 'the shared bus. ''