SU1527596A1 - Method of determining directivity pattern of phased array - Google Patents

Abstract

The invention relates to antenna measurements. The purpose of the invention is to improve the accuracy of determining the directivity pattern (DN) of a phased antenna array (PAR). The essence of this method is explained by a device consisting of HEADLIGHTS 1, emitters 2, connected through phase shifters 3 to an adder 4. Phase shifters 3 are controlled by the headlight control unit 5. G-6 sends a signal to PAR # 1, from where it goes to probe 7, located in the far or intermediate zone of PH-1 before its opening, and then to amplifier 8, on the reference input of which a signal from G-6 arrives. Measuring the signal from probe 7, amphibacometer 8 transmits the result to the recording and control unit 9, which controls the measurement process. At his command, discretes are set at the phase shifters 3, the result of measurements is recorded on the amplification meter 8, and these operations are repeated many times. Then, the coefficient of transfer between HEADLIGHT 1 and probe 7 is calculated from F-Le, and the error of this value is determined, which is taken into account when determining the DN HEADLIGHT. 1 il.

Description

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H; io6pe i the idea of a gnosis to the region of W: iciit. IAI 1.a: antenna arrays (FLR), in particular, to the determination of directivity (DN) with OUCHKOI I measurement errors.

The aim of the invention is to improve the accuracy of determining DN PAR,

The drawing shows a diagram of the device that implements the method for determining the DNFLR.

The diagram shows the HEADLIGHTS 1, the emitters 2 HEADLIGHTS connected via phase shifters 3 to the adder 4. Phase shifters 3 are controlled by the headlight control unit 5. The generator 6 sends a signal to 1, from where it enters the probe 7, located in the far or intermediate zone of the PAR, 1 before its opening, and then to the amplifier 8, to the reference input of which a signal comes from the generator 6, Measuring the signal from the probe 7, the amplifier 8 transmits the result to the recording and control unit 9, which controls the measurement process. According to the instructions, discretes of the phase shifters 3 are set, the measurement result is recorded on the amplification meter 8, these operations are repeated many times. Then calculations are performed,

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at each position of the beam j, the factor a, - (6, 4) is found and the systematic l (6. H) 4j (6, C) and random sGHe, H) i (e, V) -1j ( e, H) the components of the error determination of the DN PAR for each angle (6,. The systematic component is used to refine the DN PAR during phasing m according to the formula

(e, h) U) p

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f di (e, C))).

The random component is used to estimate the error in determining the DN PAR in each angle and each level. For this, when determining the error (6, D)), averaging is performed only over those j, which correspond to the measured values from the specified sub-band (for example, 0 ... 3; 3 ... 10; 10 ... 20 dB and

etc.).

In the case of using the method as applied to a set of PAR

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The method for determining the DN of FLR is as follows.

For a fixed probe probe 7, the transmission coefficients of all p emitters 2 in each state 1 of the phase shifter 3 to the far zone are determined by measuring the transmission coefficient between the HEADER 1 and probe 7 in different states of the phase converters 3 (switching 1M or module by methods). Then, Zovd 7 is placed in the intermediate zone of the PHAR 1 sequentially at several points, each of which corresponds to a certain direction (6, c) in the coordinate system associated with the center of the PHAR 1 (for example, by rotating the PARA with the help of a rotary device), B Each location of the probe 7 is phased with the PAR of 1 in the j direction in the scanning sector and the transmission coefficients y (6, cf, j) are measured at each position of the beam j. Many The ray beam should be sufficient for the value of y (6. C, j) to take values from the entire dynamic range of measurements of the multi-. multiple. Then, counting the coordinates r, r, j, and DNs f n (k), fjCk) of the emitters of the PAR and probe, respectively, are known (k is the wave vector) and minimize the sum

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The type of measurement of the random and systematic components of the error is made for only one HEADLAMP, and the measurement results are applied to all the HEADLIGHTS of this type measured on this bench. Such a method can serve as a method for certifying a test bench that implements a switching measurement method.

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Claims (1)

Invention Formula The method of determining the directional pattern of a phased antenna array (HEADLAMP), which consists in measuring the transmission coefficient between the HEADLIGHT and the probe in different states of phase shifters 1, determining the transmission coefficients of the HEADLAMERS in phase states 1, measuring the radiation patterns and coordinates of the probe and phased array emitters and chart definitions on 5: i527596 board, I distinguish the probe, and the state of phase shifters u and with the fact that, for the purpose of higher-1, choose from the conditions of formation no precision, measuring the coefficient of the ray in the j direction, calculate The transmission tone between the headlight and the probe is the transmission coefficient between the headlight and the sensation at different positions by the formula e M g „- rjI - fs (jl. 2k |, fn (r.-r%) f,. (r, -rj, where (jj is the transmission coefficient, and f j are diagrams of the directional th emitter of PHARNOSTI of the nth emitter at the phase x states - fdr of the probe of the correspondent 1, is formed The beam in the direction-determine the error of the value of J 15 of the transmission coefficient between the HEADLAMP and the zones is the wave vector; up to which is determined when determining and rj are the coordinates of the n-th radiation pattern of the HEADLINE. Katel PAR and probe, respectively;