RU139763U1 - RECEIVER - TRANSFORMATION OF MICROWAVE - SIGNALS X - RANGE - Google Patents

Abstract

An X-band microwave signal receiving-converting device comprising a power supply (IP), a microwave signal input and output device, a low noise amplifier (LNA), a mixer for inputting a microwave signal and a microwave local oscillator signal, and a bandpass filter (PPF) characterized in that the input device of the microwave signal is equipped with a waveguide input (BB), and the LNA is a source of negative bias voltage (IONS) and the first coupler of the microwave signal, a protection device (US) with a diode limiter (DO) is additionally introduced, logarithmic detector (LD) with an operational amplifier (OA), a second coupler of the microwave local oscillator signal, a device for amplifying and monitoring (MC) the level of the microwave local oscillator signal and a power stabilizer (SP), while the input microwave signal through the BB of the input device of the microwave signal and DO ultrasound to the input of the LNA and then to the first input of the mixer of the input microwave signal and the microwave signal of the local oscillator, the second input of which receives the microwave signal of the local oscillator, then the generated microwave signal of the intermediate frequency (IF) from the output of the mixer of the input microwave signal and microwave signal the local oscillator through the PPF to the output device of the microwave signal, at the same time part of the microwave signal from the LNA output through the first coupler is fed to the input of the LD op amp, then the processed microwave signal is fed to the output device of the microwave signal, and part of the microwave signal of the local oscillator through the second coupler is input to the CAM Microwave signal of the local oscillator, the last processed microwave signal from the output of the latter also goes to the microwave signal output device, from the said microwave signal output device, the received microwave signals are sent to consumers, the operation of the components is provided by IP, SP

Description

The utility model relates to radio engineering, namely to microwave receivers used in communication and navigation systems of airborne and ground-based radars.

For the prototype adopted multichannel microwave receiver with double frequency conversion according to the patent of the Russian Federation for utility model No. 7787, 1997, IPC ⁶ H04B 1/06, publ. September 16, 1998

The prototype device contains a power source (IP), input and output devices of a microwave signal, a low noise amplifier (LNA), a mixer for an input microwave signal and a microwave local oscillator signal, and a bandpass filter (PPF).

The disadvantages of the prototype device are low reliability due to:

- lack of control of the level of the microwave signal at the input of the mixer, and as a consequence, the possibility of distortion of the microwave signal during overload;

- lack of control of the level of the microwave signal of the local oscillator, and as a result, the possibility of distortion of the microwave signal during overload;

- the lack of protection of the LNA, and as a result, the possibility of failure of it during overload;

- lack of power stabilization,

as well as low sensitivity due to the lack of waveguide input of the microwave signal.

The problem to be solved is to increase reliability by providing control of the microwave signal at the input of the mixer and the microwave signal of the local oscillator, introducing protection for the LNA and the power stabilizer, and increasing sensitivity by providing the input device of the microwave signal with a waveguide input.

The essence of the utility model is that in the device for the conversion of microwave signals of the X-band (centimeter range), containing a power source (IP), input and output devices of the microwave signal, low-noise amplifier (LNA), the input microwave signal mixer and a microwave local oscillator signal and a band-pass filter (PPF), the microwave signal input device is equipped with a waveguide input (BB), and the LNA source of negative bias voltage (IONS) and the first microwave signal coupler, an additional protection device is introduced ( KM) with dio one limiter (DO), a logarithmic detector (LD) with an operational amplifier (OA), a second coupler of a microwave local oscillator signal, a device for amplifying and monitoring (MC) a level of a microwave local oscillator signal, and a power supply stabilizer (SP).

The essence of the utility model is illustrated by the structural diagram,

Where:

1 - waveguide input (BB),

2 - input device microwave signal

3 - diode limiter (DO),

4 - protection device (UZ),

5 - low noise amplifier (LNA),

6 - mixer input microwave signal and microwave signal of the local oscillator,

7 - bandpass filter (PPF),

8 - device output microwave signal

9 - the first coupler,

10 - logarithmic detector (LD),

11 - operational amplifier (op amp),

12 - second coupler,

13 - device amplification and control (CC) level of the microwave signal of the local oscillator,

14 - power source (IP),

15 - power stabilizer (SP),

16 - source of negative bias voltage (IONS) LNA.

The inventive device receive-convert microwave - signals of the X - band operates as follows.

The input microwave signal through BB 1 of the input device of the microwave signal 2, UP 3 UZ 4 is fed to the input of the LNA 5 and then to the first input of the mixer 6, the second input of which receives the microwave signal of the local oscillator * (not shown in the diagram, hereinafter ), then the generated microwave signal of the intermediate frequency (IF) from the output of the mixer 6 of the input microwave signal and the microwave signal of the local oscillator through PPF 7 enters the output device of the microwave signal 8, at the same time part of the microwave signal c, the output of the LNA 5 through the first coupler 9 enters the input of the op-amp 11 LD 10, then the processed microwave - the signal arrives it is emitted to the output device of the microwave signal 8, and part of the microwave signal of the local oscillator * through the second coupler 12 is fed to the input of the CAM 13 of the microwave signal of the local oscillator *; microwave signal output devices 8 received microwave signals are sent to consumers *. The operation of the components of the device for the conversion of microwave - signals of the X - band provide IP 14, SP 15 and IONS 16 LNA 5.

There are numerous sources describing the operation of units similar to an amplification and control device (AMC) of the level of the microwave signal of the local oscillator, which disclose means for realizing the sign of processing the microwave signal, for example, a solid-state amplifier of pulsed microwave power according to RF patent No. 129319, 2013, IPC ⁸ H03F 3/00, publ. 06/20/2013, Bull. No. 17, according to which the amplification of the power of the microwave signal is carried out by means of preliminary stages of amplification and the amplification unit, and control by the detectors of the input and output powers (signals).

In a specific case, imported (compact) chips from Analog Devices were used:

AD 8051 is a microcircuit for amplifying the level of the microwave signal of the local oscillator and AD 8317 is a microcircuit for controlling the level of the microwave signal of the local oscillator, the descriptions of which are given on the website of the indicated company http://www.analog.com.

Examples of the description of the operation of bandpass filters (PPF), which disclose means for realizing the feature of processing a microwave signal, are also given in numerous sources, for example, a bandpass filter according to RF patent No. 2259619, 2003. IPC ⁷ Н01Р 1/205, publ. . Bull. No. 24, 2005, according to which the microwave signal enters the PCF, consisting of strip conductors located in a line, electromagnetic connections between each segment of the input and output extended conductors provide excitation of in-phase electromagnetic waves, while under the influence of strip conductors of various configurations the selection (filtering) of the amplitude-frequency characteristic (AFC) of the output microwave signal of the necessary parameters.

In a specific case, an imported Mini-Circuits QCN-19 chip was used, a description of which is given on the website of the specified company www.http: //minicircuits.com.

The technical result is to increase reliability and sensitivity.

The specified technical result is achieved by a combination of distinctive features, namely, by supplying a microwave signal input device with a waveguide input (BB), which allows you to connect a microwave signal receiving - converting device directly to an antenna with a waveguide output, without using, for example, a waveguide - coaxial transition and coaxial cable, on which possible loss of power of the received signal and an increase in noise in the input signal, supplying a low-noise amplifier (LNA) with a negative voltage source (IONS) necessary for reliable bias power supply and setting the LNA operating point by introducing a protection device (US) with a diode limiter (DO), which protects the LNA input from overload and from the failure of the device at a high output signal level, it is possible when exposed to the antenna systems (electronic warfare) electronic warfare, the introduction of a logarithmic detector (LD) with an operational amplifier (op-amp), a second coupler microwave signal of the local oscillator, and the first coupler microwave signal, amplification and control device (CC) of the microwave level - a local oscillator needle that ensures coordination and control of the microwave oscillator signal and microwave input signal levels at the input of the mixer to ensure correct and reliable operation of the mixer, as well as a power stabilizer (SP), necessary to supply all components of the device with stabilized power supply with no external interference from others devices and units of a communication and navigation system for airborne and ground-based radars.

The presented description and structural diagram of the inventive device for receiving and converting microwave signals of the X - band (centimeter range) allow, using materials, technologies and purchased electronic products known in instrumentation, to manufacture it industrially and use it in radio communications, radar and other areas of technology for receiving and conversion of microwave signals.

Claims (1)

An X-band microwave signal receiving-converting device comprising a power supply (IP), a microwave signal input and output device, a low noise amplifier (LNA), a mixer for inputting a microwave signal and a microwave local oscillator signal, and a bandpass filter (PPF) characterized in that the input device of the microwave signal is equipped with a waveguide input (BB), and the LNA is a source of negative bias voltage (IONS) and the first coupler of the microwave signal, a protection device (US) with a diode limiter (DO) is additionally introduced, logarithmic detector (LD) with an operational amplifier (OA), a second coupler of the microwave local oscillator signal, a device for amplifying and monitoring (MC) the level of the microwave local oscillator signal and a power stabilizer (SP), while the input microwave signal through the BB of the input device of the microwave signal and DO ultrasound to the input of the LNA and then to the first input of the mixer of the input microwave signal and the microwave signal of the local oscillator, the second input of which receives the microwave signal of the local oscillator, then the generated microwave signal of the intermediate frequency (IF) from the output of the mixer of the input microwave signal and microwave signal the local oscillator through the PPF to the output device of the microwave signal, at the same time part of the microwave signal from the LNA output through the first coupler is fed to the input of the LD op amp, then the processed microwave signal is fed to the output device of the microwave signal, and part of the microwave signal of the local oscillator through the second coupler is input to the CAM Microwave signal of the local oscillator, the last processed microwave signal from the output of the latter also goes to the microwave signal output device, from the said microwave signal output device, the received microwave signals are sent to consumers, the operation of the components is provided by IP, SP and IONS LNA.

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