RU92273U1 - RADIO TRANSMISSION DEVICE - Google Patents

Abstract

A radio transmitting device including an exciter, a control and monitoring device, a power amplification device, a low-pass filter and a power supply system, characterized in that the radio transmitting device is made in the form of blocks, the first block is an exciter made on the principle of band-quartz frequency stabilization with double frequency conversion in the transmission path of the spectrum of the information signal, the second block is a control and monitoring unit, consisting of a control module, a follower about connected to the control, pairing and power boards, which in turn are connected in parallel with the cross-board, and the third block represents the power amplifiers of the RF signals to a power level of 600 W in a load of 50 Ohms in the frequency range 3-30 MHz, while the fourth block - the filter block consists of 6 octave low-pass filters, covering the entire frequency range from 1.5 to 30 MHz, the fifth block consists of a power board, including a rectifier (diode bridge), a smoothing filter and a voltage converter, while the exciter the first input is connected to the power amplifier, and the second input to the control and monitoring unit, which is connected to the power amplifier by the first input and to the filter block by the second input, which in turn is connected to the power amplifier by the first input, and the antenna matching device, which is connected to the antenna of the radio transmitting device.

Description

The utility model relates to electrical engineering and can be used to organize networks and directions of simplex and duplex radio communications for the exchange of voice and digital information.

The radio transmitting device is designed to operate as part of a set of technical facilities for high-speed KB communication and can be used autonomously, as well as as part of automated communication systems.

Placing a large number of communication equipment of various ranges and their antenna devices on the upper deck settings of ships is a difficult problem.

There are many known and portable radio stations: R-159M; R-163-50U; P-612, patent No. 002147 1999 (Japan) and others performing similar functions. The disadvantage of these radio stations are large MGH.

Closest to the technical nature of the proposed device is a radio station R-612. TU ITNYA. 464511.192, 1998. The R-612 MV-DMV radio station is designed to provide open and closed radio communications between mobile and stationary objects when used on ships and on-shore objects for radio communications with ships at international frequencies of the maritime mobile service.

The R-612 radio station operates in the frequency range 100-150, 150-400 MHz and provides:

- radiotelephone communication with amplitude and frequency modulation;

- digital broadband radiotelephone communication with AM;

- frequency telegraphy at various speeds from 50 to 19200 Baud.

The transceiver includes:

- receiving path;

- transmission path.

The transmission path includes: a power amplification device (UM), a low-pass filter, a modulator and a control device, a control system and a power system.

The disadvantages of this radio station are its large mass-dimensional characteristics (MGX) and the complexity of delivery and installation on moving objects (ships and submarines).

The purpose of the utility model is to reduce the mass-dimensional characteristics of a radio transmitting device and simplify its design.

This goal is achieved in that the radio transmitting device is made in the form of blocks, the first block is an exciter made on the principle of band-quartz frequency stabilization with double frequency conversion in the transmission path of the information signal spectrum, the second block is a control and monitoring unit consisting of a serial control module connected to the control, pairing and power board, which in turn are connected in parallel to the cross-board, the third unit represents loci of amplifying the power of RF signals to a power level of 600 W in a load of 50 Ohms in the frequency range 3-30 MHz, the fourth block is a filter block, consists of 6 octave low-pass filters covering the entire frequency range from 1.5 to 30 MHz, the fifth block consists from the power board including a rectifier (diode bridge), a smoothing filter and a voltage converter, and the sixth block is an antenna matching device which includes a discrete capacitor board connected in series with the auto-tuning sensor and a bypass mutator, which is connected to the input and output of the RF, as well as to the boards of the discrete inductance switch and the controller board, while the pathogen is connected to the power amplifier by the first input and the control and monitoring unit to the power amplifier by the second input, and a second input with a filter unit, which in turn is connected to a power amplifier by a first input, and a antenna matching device to the second input, the latter being connected to an antenna of a radio transmitting device.

In FIG. presents a block diagram of a radio transmitting device. It contains: 1 - the pathogen; 2 - control and monitoring unit; 3 - control board; 4 - interface card; 5 - power board; 6 - cross-board; 7 - power amplification unit of the RF signals; 8 - filter block; 9 - power supply; 10 - antenna matching device.

The causative agent 1, provides the formation of the operating frequency and a given class of radiation. The exciter unit is built on the principle of band-quartz frequency stabilization with double frequency conversion in the transmission path of the information signal spectrum and works as follows. The subunits of the formation of single-band signals and telegraph signals form telephone and telegraph types of work at an intermediate frequency of 128 kHz. They also generate output information signals (Output 128 kHz) from a highly stable reference oscillation with a frequency of 20 MHz coming from the mid frequency synthesizer unit, while maintaining the stability of the reference oscillation and without phase discontinuity when the frequency changes.

The transmitter units provide amplification of the output signal from the exciter unit to a power level of 1000 W (500 W), filtering the higher harmonic components of the operating frequency and matching with an antenna-feeder device.

The control and monitoring unit 2 is the main part of the control system of the radio transmitting device and is intended to control the product as a whole. It consists of a control module 3, interface card 4, power board 5 and cross-board 6. The control and monitoring unit 2 provides:

- power amplifier control;

- power supply control;

- pathogen control using a 4-wire IRPS interface and “wire command”, “Work”, “OTPIR DIST”, etc.

- control of the filter block;

- control of the antenna matching device via the serial two-wire RS-232 interface;

- logical interaction with ADU via Ethernet;

- storing tuned transmitter channels, etc.

The RF signal power amplification unit 7 is designed for broadband RF signal power amplification to a power level of 600 W at a load of 50 Ohms at the peak of the signal envelope with single-band modulation in the frequency range 3-30 MHz. The power supply voltage of the amplifier is E = 48 V. The input impedance of the unit is 25 Ohms with KBV ≥ 0.8, the input voltage does not exceed 26 V.

In signal amplification mode, the current consumption does not exceed 30 A, in statics 4-6 A. And intermodulation distortion is not more than minus 36 dB.

Filter block 8. In the filter block 8, the higher harmonic components of the operating frequency of the transmitter are suppressed. From the output of the matching transformer, a 1 kW power signal is supplied to the harmonic filter system. The block has six octave low-frequency filters (LF), covering the entire frequency range from 1.5 to 30 MHz. The bandwidths of each filter are broken down as follows:

1 filter 1.5-2.5 MHz; 2 filter 2.5-4.1 MHz; 3 filter 4.1-6.8 MHz; ....... 6 filter 18.8-30 MHz. The filters are made according to the identical scheme of the ten-element low-pass filter Kauer-Zolotarev. The last two filters are made according to the “plug” scheme of low-pass and high-pass filters. Connecting and disconnecting the filters is done using a relay type SCHRACK RT314024.

The power supply 9 is designed to power a power amplifier 7, voltage 40 V 30 A. The power supply 9 is made in the form of a casing in which the power module FLATPACK 1500 ELTEK is inserted.

After receiving a command to turn on the PSU, the voltage of 5 V is removed from the board with the elements and the power module opens. The output voltage of 40 V through the filter is supplied to the PA.

Antenna matching device 10 is designed to match the impedance of the antenna-feeder device with an output impedance of the filter unit of 50 Ohms. For normal and stable operation of the power amplifier, the device 10 must provide a traveling wave coefficient (KBW) in the feeder at the output of the power amplifier at least about 75. Typical setup time for a new channel is 1.5 seconds. Switching time to a pre-programmed channel - no more than 50 ms.

The device 10 consists of a discrete capacitor board connected in series with an auto-tuning sensor and a bypass switch, which is connected to the RF input and output, as well as to boards of a discrete inductance switch and a controller board.

The matching Π-circuit is made on the basis of discretely switched inductances and capacitors. Discrete circuit elements are controlled by the internal controller of the antenna matching device.

Structurally, the Π-circuit is made in the form of separate boards:

- discrete capacitor board (input);

- discrete circuit board (output);

- commutator inductance.

The controller board is a printed circuit board inserted in block 10. Control commands from the controller to other boards are received through connectors X1 ... X6, + 12V, + 24V power is supplied to the controller through terminal block X8.

Device 10 operates in two modes:

channel preparation mode and operation mode on pre-prepared channels.

The control of the antenna matching device 10 is carried out via the RS-232 channel from the control board located in the control and monitoring unit via the X1.1 connector of unit 10.

In the process of tuning to a new channel, the discrete elements of the matching circuit are automatically selected to ensure the best matching with the antenna according to the signals of the auto-tuning sensor. The tuning results are stored in the controller memory. Device 10 is capable of storing settings for 1000 channels. Among the memorized parameters include the position of all discrete elements of the matching circuit.

The operation of the radio transmitting device is as follows.

The generated RF signal from the pathogen is fed to the preliminary power amplifier, where it is amplified to a predetermined level and fed to the UM-500 power amplifiers. The amplified UM-500 signals enter the filter block, where the signal harmonics are filtered by octave harmonic filters. Next, the RF signal enters the antenna matching unit, which performs narrow-band matching of the output of the radio transmitting device with the load. From the output of the antenna matching unit, the signal is sent to the output terminal of the transmitter rack.

The secondary power supply to all devices of the radio transmitting device is provided by power supplies.

Comprehensive control of all components of a radio transmitting device is carried out by a control and monitoring unit. Information signals, remote control and control signals are sent to the control and monitoring unit, where they are processed and switched according to the specified algorithms.

The use of the inventive radio transmitting device can significantly reduce weight and size characteristics, simplify its design and increase the convenience of delivery and commissioning on moving objects by making the radio transmitting device in the form of separate blocks, and the blocks are mounted in a common casing.

Claims (1)

A radio transmitting device including an exciter, a control and monitoring device, a power amplification device, a low-pass filter and a power supply system, characterized in that the radio transmitting device is made in the form of blocks, the first block is an exciter made on the principle of band-quartz frequency stabilization with double frequency conversion in the transmission path of the spectrum of the information signal, the second block is a control and monitoring unit, consisting of a control module, a follower about connected to the control, pairing and power boards, which in turn are connected in parallel with the cross-board, and the third block represents the power amplifiers of the RF signals to a power level of 600 W in a load of 50 Ohms in the frequency range 3-30 MHz, while the fourth block - the filter block consists of 6 octave low-pass filters, covering the entire frequency range from 1.5 to 30 MHz, the fifth block consists of a power board, including a rectifier (diode bridge), a smoothing filter and a voltage converter, while the exciter the first input is connected to the power amplifier, and the second input to the control and monitoring unit, which is connected to the power amplifier by the first input and to the filter block by the second input, which in turn is connected to the power amplifier by the first input, and the antenna matching device, which is connected to the antenna of the radio transmitting device.