SU1305804A1 - Linear active phased array - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to improve the accuracy of the formation of the phase distribution. The device contains emitters 1, active modules 2, discrete and analog phasers (F) 3 and 4, phase detectors (PD) 5, adders 6 and 7, inverter 8, distributor 9, exciter 10 and control unit 11. The goal is achieved by introducing adders 6 and 7 and the inverter 8, together with F 4 and FD 5, form an automatic phase stabilization system. 1 il. p I (l l eo

Description

11305804

This invention relates to radio engineering and can be used in electrically scanned antenna arrays.

The purpose of the invention is to improve the accuracy of the formation of the phase distribution.

The drawing shows a structural diagram of a linear active phased antenna array (AFAR) .fO

Linear AFAR contains emitters 1, active modules 2, discrete phase shifters 3, analog phase shifters 4, phase detectors 5, first adders 6, second adders 7, inverter 5, distributor 9, exciter 10 and control unit 11.

Linear AFAR works as follows.

When a uniform initial phase front is formed in the aperture corresponding to the zero phase distribution, the phase difference of the signals at the output of the neighboring active modules

Uj error signals without change

in the first adders 6 act on the control inputs of the respective analog phasers 4. The error signal supplied to the control input of the analog phasers 4 of the N-ro radiator 1 is formed by sequentially adding in the second adders 7 the output voltages of all phase detectors 5 s then inverting the result in inverter 8,

The control input of the analog phase shifter 4 channels of each radiator 1 is supplied with an error signal proportional to the phase difference of the signals at the output of the active module 2 of the channel of this and neighboring emitters 1. Moreover, for the N-ro radiator 1 the first radiator 1 is adjacent. the active module 2 of the channel of each emitter 1 is set to oscillate with a phase equal to the average value of the phases of the vibrational channels of all emitters 1 cf. At q ./N.

g 1 1

2 must be zero. If the output at the outputs of the active modules 2 is the same, the condition of equality of the phases of the signals exciting the emitters 1 is applied, the voltage at the outputs of all phase detectors 5 is zero and the automatic phase stabilization system containing the phase 30 As a result, the phase of the output signal detectors 5 , the first and second totalizers of all active modules 2, adjustments 6 and 7 and analog phasers with the help of the automatic 4 system, do not affect the operation of the linear AFAR, phase stabilization under cp ,. . Since from the control unit 11, during the formation of the required phase phasation ha by sampling the zero phase distribution phase shifters 3, the second inputs of all the first sum distributions other than numbers 6 receive zero signals. If, however, as a result of any destabilizing factors of the conditional, the second inputs of the first adders 6 from the control block 11 receive signals equal to the voltage on the equality of the phases is not fulfilled, on 40 turns of the phase detectors 5 that have output of the phase detectors 5 nominal (. necessary

the error signal is constant - a constant voltage proportional to the phase difference of the signals at the outputs of the active modules 2 channels of the neighboring emitters 1,

and,, (cp, -cf,)

Uz Kfr (s (., - C (s)

,

CFG | (CHY -, - CH m)

Uj is the voltage at the output of the phase detector 5 of the channel of the i-ro radiator;

 - the phase of the signal at the output of the active module 2 of the i-ro radiator 1;

 the steepness of the characteristics of the phase detector 5,

Uj error signals without change

in the first adders 6 act on the control inputs of the respective analog phasers 4. The error signal supplied to the control input of the analog phasers 4 of the N-ro radiator 1 is formed by sequentially adding in the second adders 7 the output voltages of all phase detectors 5 s then inverting the result in inverter 8,

The control input of the analog phase shifter 4 channels of each radiator 1 is supplied with an error signal proportional to the phase difference of the signals at the output of the active module 2 of the channel of this and neighboring emitters 1. Moreover, for the N-ro radiator 1 the first radiator 1 is adjacent. the active module 2 of the channel of each radiator 1 is set to oscillate with a phase equal to the average value of the phases of the oscillations at the outputs of the active modules 2 ka. As a result, the signal phase at the output of all active modules 2 adjusts schyu automatic stabilization phase system under cp ,. . When forming with the help of discrete phase shifters 3 the required phase distribution, different from

All emitters lump 1 cf. At q ./N.

g 1 1

the output of the active modules 2 ka. As a result, the phase of the signal at the output of all active modules 2 adjusts with using the system of automatic stabilization of the phase for cp ,. . When forming with the help of disk phase shifters 3 the required phase distribution, different from

the output of the active modules 2 ka. As a result, the phase of the signal at the output of all active modules 2 adjusts with the help of an automatic phase stabilization system for cf. . When forming with the help of discrete phase shifters 3 the required phase distribution,

signals to the second inputs of the first adders 6 from the control unit 11 are equal to the voltages to calculate the required phase distribution) phase difference of the signals at the outputs of the active modules 2 channels

neighboring emitters 1. Then the voltage at the outputs of the first adders 6 is proportional to the deviation of the actual phase difference of the signals feeding the neighboring emitters 1., from the nominal,

and due to the failure of the automatic phase stabilization system, this deviation was worked out by changing the phase shift in the analog phase shifters 4

The accuracy of the formation of the phase distribution is determined only by the static error of the automatic phase stabilization system.

313

Claims (1)

Invention Formula Linear active phased antenna array containing the exciter, the output of which is connected to the distributor input, N radiators, each of which is connected to the output of the corresponding active module, the input of which is connected to the output of the corresponding discrete phase rotation bodies, the control input of which is under-. fO are connected to the second inputs are connected to the corresponding output of the control unit, N analog phase shifters, the outputs of which are connected to the signal inputs of the corresponding discrete phase shifters, and the signal 5th, except the last one, is connected The inputs are to the distributor outlets, (N-1) phase detectors, the first inputs of which are connected to the output of the corresponding active module, which, in order to improve the accuracy of the formation of the phase distribution, has been entered into it (N -1) first adders, (N-2) second compiler I.Grubrin Editor O.Yurkovetskaya Tehred A. Kravchuk Proofreader A.Ziyokosov Order 1463/53 Circulation 626 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 The second input of each phase detector is connected to the output of the adjacent active module, and its output is connected to the first input of the corresponding first adder, the output of which is connected to the control input of the corresponding analog phase shifter, the outputs of the DC control unit of the first adders, the output of each first adder, except the first, is connected to the first input of the corresponding second adder, the output of which, except the last, is connected to the second input of the subsequent second adder, the output of the first adder is connected to the second input of the subsequent second adder, the output of the last second adder is connected to the input of the inverter, the output of which is connected to the control input of the last analog phase shifter.