RU45831U1 - COMPOSITE SIGNAL TRANSMITTER - Google Patents

Abstract

The invention relates to a radio-measuring technique and can be used as a reference generator of complex radio signals for testing devices for analyzing the parameters of complex signals in broadband communication systems, direction finding and passive radar. The technical result achieved in the implementation of the proposed utility model is to expand the range of operating frequencies in the formation of complex signals. The complex signal transmitter contains the first and second frequency-modulated signal generators, the first and second mixers, the first and second filters, the first local oscillator, the first frequency-modulated signal generator and the first local oscillator connected to the inputs of the first mixer, the output of which through the first filter with the first the input of the second mixer, connected by the output to the input of the second filter, and the second heterodyne input - with the output of the second generator of frequency-modulated signals. Ten filters, two mixers, three local oscillators, eleven amplifiers, eleven antennas and a control unit are introduced into it, while the output of the first mixer is connected through the third filter and the first amplifier with the first antenna, through the fourth filter and the second amplifier with the second antenna, through the fifth filter and the third amplifier with the third antenna, the output of the second mixer is connected respectively through the sixth filter and the fourth amplifier with the fourth antenna, through the seventh filter and the fifth amplifier with the fifth antenna , through the eighth filter with the combined input of the seventh amplifier and the first input of the fourth mixer and the seventh amplifier with the seventh antenna, the output of the second filter is connected respectively through the sixth amplifier with the sixth antenna, as well as with the first input of the third mixer, the output of which is connected respectively through the ninth filter and the eighth an amplifier with an eighth antenna, through a tenth filter and a ninth amplifier with a ninth antenna, through an eleventh filter and a tenth amplifier with a tenth antenna, the output of the fourth local oscillator is connected to the fourth mixer input, the output of which through the twelfth filter and the eleventh amplifier is connected to the eleventh antenna, the output of the third local oscillator is connected to the second reference input of the third mixer, the output of the second local oscillator is connected to the third reference input of the second mixer, the individual outputs of the control unit are connected to the corresponding control inputs of all local oscillators, amplifiers and generators of frequency-modulated signals.

Description

The proposed utility model relates to radio measurement technology and can be used as a reference generator of complex radio signals for testing devices for analyzing the parameters of complex signals in broadband communication systems, direction finding and passive radar.

A device is known for converting a single electric pulse into a sequence of phase-shifted radio pulses (A. s. USSR No. 337930, M. Cl. Н 03 k 11/00, publ. BI No. 15, 1972) which includes a recirculator with a frequency shift, consisting of included in the ring of the delay line, the frequency-shifting converter, the amplifier and the adder, to which the system input terminals are also connected, connected through a set of channel frequency bandpass filters, the number of which is equal to the discrete number of the processed sequence, with the input inputs of the respective channel frequency converters, each of which is connected through its own phase shifter to the output adder, and the filter of the first frequency channel is connected directly to the output adder, while the output of the adder is the output of the entire system, and to the second inputs of the frequency-shifting converter and channel frequency converters from the unit harmonics having a number of outputs equal to the number of channel frequency converters, a heterodyning signal is supplied.

Also known is a frequency modulator (Pat. RF No. 2012150, M. Cl. H 04 L 27/12, publ. 04/30/1994), which includes a signal shaper, whose outputs through the first and second low-pass filters are connected respectively to the first and the second multipliers, while the signal from the generator enters the second input of the first multiplier through the phase shifter, and the outputs of the first and second multipliers are directly connected to the first and second input of the adder, the output of which is the output of the device, to the second input of the second multiplier ystva.

The main disadvantage of the first and second analogs is that both of these devices are single-channel, and with such a structure it is very difficult to build them multi-octave, since many microwave devices - mixers, amplifiers, adders do not work in the ultra-wide frequency band.

The closest in technical essence to the claimed device is a prototype device: push-pull frequency modulator with double frequency conversion (Sokolinsky V.G., Sheinkman V.G. Frequency and phase modulators and manipulators.

M .: Radio and communications, 1983 - 192 p. on page 74). The prototype device contains the first and second frequency-modulated signal generators, the first and second mixers, the first and second filters, the first local oscillator, the first frequency-modulated signal generator and the first local oscillator connected to the inputs of the first mixer, the output of the first mixer through the first filter connected in series , the second mixer and the second filter are connected to the output of the device, and the heterodyne input of the second mixer is connected to the output of the second generator of frequency-modulated signals.

Signs common with the claimed utility model are: first and second frequency modulated signal generators, first and second mixers, first and second filters, and a first local oscillator.

The disadvantage is the presence of only one channel, and with such a construction structure it is very difficult to build it multi-octave, since many microwave devices - mixers, amplifiers, adders do not work in the ultra-wide frequency band. The latter feature is fundamental, since it is the basis for improving the characteristics of the prototype.

The task to which the proposed utility model is directed is to expand the range of operating frequencies in the formation of complex signals.

The technical result achieved by the implementation of the proposed utility model is the formation of complex signals in a wide range of frequencies.

The technical result is achieved by the fact that in a push-pull frequency modulator with double frequency conversion, containing the first and second frequency modulated signal generators, the first and second mixers, the first and second filters, the first local oscillator, the first frequency modulated signal generator and the first local oscillator connected to the inputs of the first mixer, the output of which through the first filter with the first input of the second mixer, connected by the output to the input of the second filter, and the second heterodyne input, with the output of the second gene frequency-modulated signals, filters from the third to twelfth, third and fourth mixers, second, third and fourth local oscillators, as well as 11 amplifiers, 11 antennas and a control unit, the output of the first mixer through the third filter and the first amplifier is connected to the first antenna, the output of the first mixer through the fourth filter and the second amplifier is connected to the second antenna, the output of the first mixer through the fifth filter and the third amplifier is connected to the third antenna, the output of the second mixer through the sixth filter and the fourth second amplifier coupled to the fourth antenna, the output of the second mixer via the seventh and fifth power filter is coupled to the fifth antenna, output of the second mixer through the eighth and seventh filter amplifier coupled to seventh antenna output of the second

the mixer through the second filter and the sixth amplifier is connected to the sixth antenna, the second filter through the third mixer, the ninth filter and the eighth amplifier is connected to the eighth antenna, the output of the third mixer through the tenth filter and the ninth amplifier is connected to the ninth antenna, the output of the third mixer through the eleventh filter and tenth the amplifier is connected to the tenth antenna, the output of the eighth filter through the fourth mixer, the twelfth filter and the eleventh amplifier is connected to the eleventh antenna, the reference input of the second mixer is connected ene with a second local oscillator, the reference input of the third mixer is connected to a third local oscillator reference input of the fourth mixer is connected to a fourth local oscillator, the outputs of the control unit connected to all the local oscillators, amplifiers and all the first and second generators frequency-modulated signals.

The essence of the utility model is illustrated by drawings, where:

- figure 1 presents the structural diagram of the inventive transmitter of complex signals;

- figure 2 shows what frequencies and how are obtained at the output of the device from the frequencies of the first f _ghms1 and second G _ghms2 generators of frequency-modulated signals, intermediate signals f _{c in1,} f _{c in2} and f _{c in3} and also the frequencies of four local oscillators f _{get1 ,} f _get2, f _get3, f _get4

- figure 3 presents an example implementation of the control unit. The proposed complex signal transmitter (FIG. 1) comprises a first frequency-modulated signal generator 1, a first mixer 2, a first local oscillator 3, a third filter 4, a fourth filter 5, a first filter 6, a fifth filter 7, a third amplifier 8, a third antenna 9, first amplifier 10, first antenna 11, second amplifier 12, second antenna 13, second frequency modulated signal generator 14, second mixer 15, second local oscillator 16, twelfth filter 17, eleventh amplifier 18, eleventh antenna 19, sixth filter 20, seventh filter 21, second filter 22, eight oh filter 23, fourth mixer 24, fourth local oscillator 25, fourth amplifier 26, fourth antenna 27, fifth amplifier 28, fifth antenna 29, sixth amplifier 30, sixth antenna 31, third mixer 32, third local oscillator 33, seventh amplifier 34, seventh antenna 35, the ninth antenna 36, the ninth amplifier 37, the eighth antenna 38, the eighth amplifier 39, the ninth filter 40, the tenth filter 41, the eleventh filter 42, the tenth amplifier 43, the tenth antenna 44, the control unit 45.

The first generator of frequency-modulated signals 1 and the first local oscillator 3 are connected to the inputs of the first mixer 2, the output of which through the first filter 6 with the first input of the second mixer 15, connected by the output to the input of the second filter 22,

and the second heterodyne input - with the output of the second generator of frequency-modulated signals 14, the output of the first mixer 2 is connected respectively through the third filter 4 and the first amplifier 10 with the first antenna 11, through the fourth filter 5 and the second amplifier 12 with the second antenna 13, through the fifth filter 7 and the third amplifier 8 with the third antenna 9, the output of the second mixer 15 is connected respectively through the sixth filter 20 and the fourth amplifier 26 with the fourth antenna 27 through the seventh filter 27 and the fifth amplifier 28 with the fifth antenna 29, through the eighth filter 23 with the combined input of the seventh amplifier 34 and the first input of the fourth mixer 24 and the seventh amplifier 34 with the seventh antenna 35, the output of the second filter 22 is connected respectively through the sixth amplifier 30 with the sixth antenna 31, as well as with the first input of the third mixer 32, the output of which is connected through the ninth, respectively filter 40 and the eighth amplifier 39 with the eighth antenna 38, through the tenth filter 41 and the ninth amplifier 37 with the ninth antenna 36, through the eleventh filter 42 and the tenth amplifier 43 with the tenth antenna 44, the output of the fourth local oscillator 25 is connected with the second input of the fourth mixer 24, the output of which through the twelfth filter 17 and the eleventh amplifier 18 is connected to the eleventh antenna 19, the third local oscillator is connected to the second reference input of the third mixer, the output of the second local oscillator is connected to the reference input of the second mixer.

Figure 2 shows the frequency values of the generators of frequency-modulated signals and local oscillators, as well as the formulas for the operation of devices (mixers) that carry out the corresponding transfer of frequencies into the frequency ranges necessary for radiation, set using the control device in accordance with the requirements of the customer of the proposed device.

An example of the control unit in figure 3 contains: a multiplexer 46, a binary code decoder 47, a storage device 48, inverters with high load capacity 49, 50, 51, a relay 52-62 with normally open contacts (not shown in figure 3), four a switch to 12 positions S4 "Frequency", a communication channel with a personal computer for automatically setting the frequency code from the personal computer, a toggle switch for turning on the transmitter of complex signals to the initial state S1.

The inventive transmitter of complex signals operates as follows. The principle of operation is described according to the scheme of figure 1 with the help of frequency conversion diagrams in figure 2.

The first generator 1 of frequency-modulated signals provides the formation of a narrow-band frequency-modulated signal f _ghms1 with a frequency deviation of not more than 5 MHz and a center frequency of 12.5 MHz. The second generator 14 frequency-modulated signals provides the formation of a broadband frequency-modulated signal f _ghms2 with a frequency deviation of not more than 100 MHz and a central

of a given signal f _ghms2 with a frequency deviation of not more than 100 MHz and a center frequency of 150 MHz. The first mixer 2 carries a signal with a frequency of 12.5 MHz using the frequency f _{get1 of the} first local oscillator 3, switched by the control device to one of three values of 50 MHz; 137.5 MHz; 237.5 MHz, at a frequency of 62.5 MHz; 125 MHz; 150 MHz; 250 MHz meter wavelength range. These signals are filtered respectively by the third filter 4, the fourth filter 5, the first filter 6 and the fifth filter 7. Signals f _{c o} with frequencies of 62.5 MHz; 125 MHz and 250 MHz are amplified in the first amplifier 10, the second amplifier 12, and the third amplifier 8, respectively, and are transmitted into the air, respectively, by the first antenna 11, the second antenna 13, and the third antenna 9.

The signal f _{c in1} with a frequency of 150 MHz, selected by the first filter 6, is fed to the input of the second mixer 15, where, using the switched frequency f _{get2 of the} second local oscillator 16, it is transferred to one of the frequencies of 500 MHz, 1000 MHz, 1750 MHz, 2000 MHz decimeter range wavelengths. In this case, the frequencies f _{get2 of the} second local oscillator 16, switched by the control device to one of four values, are 650 MHz, 850 MHz, 1900 MHz, 1850 MHz (see the frequency conversion diagram in figure 2). Signals with frequencies of 500 MHz, 1000 MHz, 1750 MHz and 2000 MHz are filtered by the sixth filter 20, the seventh filter 21, the second filter 22 and the eighth filter 23, respectively, amplified in the fourth amplifier 26, the fifth amplifier 28, the sixth amplifier 30, the seventh amplifier 34 and radiated respectively by a fourth antenna 27, a fifth antenna 29, a sixth antenna 31, and a seventh antenna 35.

Instead of a narrow-band frequency-modulated signal f _{with bx1} = 150 ± 5 MHz from the output of the first filter 6, a broadband frequency-modulated signal f _gfms2 go of the second generator of frequency-modulated signals 14 can arrive at the first input of the second mixer 15, the frequency deviation of this signal can reach 100 MHz, and the carrier frequency is 150 MHz. In this case, the broadband frequency-modulated signal f _ghms2 passes through the same circuits as the narrow-band signal f _{c in1} .

From the output of the second filter 22, the signal f _{c in2} with a carrier frequency of 2000 MHz is also fed to the first input of the third mixer 32, the second input of which is fed to the signal f _get3 with a frequency of 10 GHz from the third local oscillator 33. At the output of the third mixer 32, signals with three frequencies are obtained 8 GHz, 12 GHz, and 18 GHz, which are allocated respectively by the ninth filter 40, the tenth filter 41, and the eleventh filter 42, are amplified by the eighth amplifier 39, the ninth amplifier 37, and the tenth amplifier 43, respectively, and are emitted into space, respectively, of the eighth antenna 38 th, ninth and tenth antenna 36 antenna 44.

From the output of the eighth filter 23, the signal f _{c in3} with a carrier frequency of 1750 MHz is also supplied to the first input of the fourth mixer 24, to the second input of which the signal f _{get4 of the} fourth local oscillator 25 with a frequency of 2250 MHz is supplied. The signal from the output of the fourth mixer 24 is filtered by the twelfth filter 17, amplified by the eleventh amplifier 18 and radiated into space by the eleventh antenna 19.

To ensure the switching of the emitted frequencies, a control unit 45 is used, which switches the power of the output amplifiers from the first to the eleventh. Turning off the power of any amplifier prevents the signal from passing through it and radiation through the antenna corresponding to the amplifier does not occur. In addition, the control unit generates the appropriate codes for controlling frequency synthesizers-local oscillators 3, 16, 33, and 25, as well as potentials for turning on the frequency-modulated signal generators 1 and 14.

Thus, working according to the principle described above, the proposed transmitter of complex signals generates output signals in various frequency ranges, which allows to obtain a positive effect.

The proposed transmitter complex signals can be performed based on the following elements. The first and second generators of frequency-modulated signals can be performed as described in the book [V.G. Sokolinsky, V.G.Sheinkman. Frequency and phase modulators and manipulators. M., Radio and communications, 1983, p. 94, Fig.3.36]. The characteristics realized in this case are shown in table 1.

Table 1 Parameter Name ChMG1 ChMG2 Carrier frequency 12.5 MHz 150 MHz Maximum frequency deviation 5 MHz 100 MHz 50 Ohm Output Level 100 mV 100 mV

Amplifiers are all purchased, information about them is given in table 2.

table 2 Designation Device type No. of technical conditions Frequency U1 M42121 6Sh2.030.150TU 62.5 MHz U2 M42121 6Sh2.030.150TU 125 MHz U3 M42121 6Sh2.030.150TU 250 MHz U4 M42121 6Sh2.030.150TU 500 MHz

Continuation of table 2 U5 M42121 6Sh2.030.150TU 1000 MHz U6 M42141 6Sh2.030.157TU 2000 MHz U7 M42140 6Sh2.030.181TU 1750 MHz U8 M42195 6Sh2.030.229TU 12 GHz U9 M42195 6Sh2.030.229TU 8 GHz U10 M421102-2 6Sh2.030.220TU 18 GHz U11 M42164-2 6Sh2.030.195TU 4 GHz

Bandpass filters F1-F12 are implemented as follows. Filters F1, F3-F5 are made on lumped elements as described in the book: Hanzel G. Handbook for the calculation of filters. M .: Soviet radio, 1974. The F6 filter at a frequency of 500 MHz is made of comb type and contains four resonators with shortening adjustable capacities. Filters F2, F7, F8, F12 are made on quarter-wave resonators of an air-strip design (on oncoming rods). Filters F9-F11 are made of microstrip on half-wave resonators with quarter-wave coupling on a soft dielectric of the FAF or FLAN type. the parameters realized in this case are shown in table 3.

Table 3 A type Carrier frequency Δf _P F1 150 MHz 10 MHz F2 2000 MHz F3 62.5 MHz 5 MHz F4 125 MHz 6 MHz F5 250 MHz 12 MHz F6 500 MHz 14 MHz F7 1000 MHz 100 MHz F8 1750 MHz 100 MHz F9 12 GHz F10 8 GHz F11 18 GHz F12 4 GHz

Antennas A1-A3 - vibrator type, A3-A11 - slot antennas made on a single-sided foil fiberglass with a thickness of 2.5 mm.

The СМ1 mixer is made on a 174PS4 chip, СМ2 - on a IAM81008 chip from Agilent Technologies, СМ3 and СМ4 are made on diodes with a Schottky type 2A125A-3 barrier.

The local oscillators for all operating frequencies are made according to the frequency synthesizer circuit on the LSI of a frequency synthesizer type LMX2325 from International Semiconductor, except for a local oscillator for a frequency of 10 GHz. This local oscillator consists of a master generator-synthesizer of frequency 2 GHz, a frequency multiplier on a varactor of type 2A609B and a power amplifier of type M42195.

The control unit is implemented on medium-integrated circuits and P2G3 screw switches, as shown in Fig. 4. Switch S4 "Frequency" is a four-gang switch for 12 positions of the type P2G3 12P4N, on which a 4-digit binary frequency code is dialed, and the inscriptions on the front panel around the switch control knob correspond to the emitted frequencies: 62.5; 125; 250; 500 MHz; 1; 1.75; 2; 4; 8; 12; 18 GHz. This code in manual frequency control mode via multiplexer 46 (IMS KR 1533 KPP A) is fed to the binary code decoder in position (IMS K155ID3). Further, the position code through the inverters with increased load capacity (IC K155LA12) is fed to the relay type RES 10. Each of these relays through the contacts, not shown in FIG. 3, supplies the supply voltage to the corresponding relay of the output power amplifiers, as a result of which a signal is emitted at a frequency determined for a given power amplifier. The potential coming from the toggle switch S1 sets the multiplexer to its initial state in which the relays are de-energized and the radiation stops. For automatic control of the transmitter, it is advisable to provide a communication channel with the PC in the control device.

The presented drawings and the description of the transmitter of complex signals allow, using the existing element base, to manufacture it industrially and use it for its intended purpose, which allows us to conclude that the proposed utility model is industrially applicable.

Claims (1)

A complex signal transmitter comprising first and second frequency-modulated signal generators, first and second mixers, first and second filters, a first local oscillator, the first frequency-modulated signal generator and a first local oscillator connected to the inputs of the first mixer, the output of which through the first filter, with the first the input of the second mixer, connected by the output to the input of the second filter, and the second heterodyne input - with the output of the second generator of frequency-modulated signals, characterized in that it has an additional o ten filters, two mixers, three local oscillators, eleven amplifiers, eleven antennas and a control unit are introduced, while the output of the first mixer is connected through the third filter and the first amplifier to the first antenna, through the fourth filter and the second amplifier with the second antenna, through the fifth filter and a third amplifier with a third antenna, the output of the second mixer is connected respectively through a sixth filter and a fourth amplifier with a fourth antenna, through a seventh filter and a fifth amplifier with a fifth antenna, through an eighth fil tr with the combined input of the seventh amplifier and the first input of the fourth mixer and the seventh amplifier with the seventh antenna, the output of the second filter is connected respectively through the sixth amplifier with the sixth antenna, as well as with the first input of the third mixer, the output of which is connected through the ninth filter and the eighth amplifier with the eighth, respectively antenna, through the tenth filter and the ninth amplifier with the ninth antenna, through the eleventh filter and the tenth amplifier with the tenth antenna, the output of the fourth local oscillator is connected to the second input of the fourth the second mixer, the output of which through the twelfth filter and the eleventh amplifier is connected to the eleventh antenna, the output of the third local oscillator is connected to the second reference input of the third mixer, the output of the second local oscillator is connected to the third reference input of the second mixer, the individual outputs of the control unit are connected to the corresponding control inputs of all local oscillators, amplifiers and generators of frequency-modulated signals.