SU679898A1 - Device for automatic measuring and recording of phase characteristics of irradiating apertures - Google Patents

Description

The first amplitude detector 9 is connected to it, as well as the recorder 10 connected respectively to the sensor 7 coordinates and the angle of rotation sensor 5 located between the second output of the power divider 2 and the third input of the recorder 10 are connected in series to the signal splitter 11, the second amplitude detector 12 and comparator analyzer 13, while the second input of the comparator-analyzer 13 is connected to the output of the first amplitude detector 9, and the second output of the signal splitter 11 is connected through the reference phase shifter 4 to the first input Ultrahigh-frequency bridge 8, the second input of which is connected to the output of the indicator probe 6, the motor 14.

The device works as follows.

The signal from the microwave generator 1 is fed to the power divider 2, from the first output of which the signal goes to the radiating aperture 3, and from the second output to the input of the signal splitter 11, which in turn divides the input signal into the reference and threshold. The reference signal is fed to the input of the reference phase shifter 4, in which the dielectric plate is rotated by an independent electric motor 14, as a result of which the phase of the reference signal periodically varies from 0 to 2. The speed of phase change is determined by the rotational speed of the shaft of an independent electric motor 14. On the axis of the reference phase shifter 4 a rotation angle sensor 5 is installed, from which the recorder 10 receives as a code information about the angle of rotation of the dielectric plate of the reference phase shifter 4, and consequently, about the phase passing through him the reference signal. After the reference phase shifter 4, the phase-modulated reference signal is fed to the first input of the microwave bridge 8, the second input of which receives the measured signal from the indicator probe 6 located in front of the radiating aperture 3. From the amplitude detector 9 installed at the output of the microwave detector to the second input of the comparator The analyzer 13 receives the resultant signal (Fig. 2a) after adding the reference and measured signals. The first input of the comparator-analyzer 13 through the amplitude detector 12 installed at the output of the signal splitter 11 receives a threshold signal (FIG. 26). According to the commands of the comparator analyzer 13, the values of the phase of the measured signal and the sensor readings of the 7 coordinates of the indicator probe 6 are recorded in the recorder 10.

B. The point ti (Fig. 2) turns on an independent electric motor 14, begins the phase modulation of the reference signal using the reference phase shifter 4, the form of the resulting signal changes (Fig. 2a). At points 4 and te, the phases of the reference and measured signals are equal, and at ti, they are opposite. At points s and t, the amplitudes of the resultant and threshold signals are equal.

Simultaneously with the inclusion of an independent electric motor 14 in the recorder 10

the counting angle of the axis of the reference phase shifter 4 begins, and hence the phase of the reference signal. At point t, the comparator-analyzer 13 operates and issues a command to the recorder 10, according to which

the counting mode is changed, and instead of the integer values of the angles φ, half are recorded — 1/2 sr. As a result, when at point t the comparator-analyzer 13 is triggered again and the counting stops, in the recorder

10 is recorded angle value +

4T. e. phase size support +

signal for point t, where it differs from the measured phase by l.

The comparator-analyzer 13 issues a command to the registrar 10 only in the above order, i.e., first at point 3, and then at point 5, or in the corresponding pairs of points with phases Φ, + 2n

 + p-2l. The operation of the comparator analyzer 13 at point 5, for example, and then at point t is excluded.

Thus, the comparison of the resulting signal with the threshold is made on

high levels, much higher than the level of schums. The device eliminates the need to equalize the amplitudes of the measured and reference signals with the help of a complex amplifier-limiter, since the comparator-analyzer 13 does not have a fixed threshold response.

The device compared with the prototype provides a higher accuracy of measurements.

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Claims (1)

Invention Formula An apparatus for automatically measuring and recording phase characteristics of emitting apertures comprising an oscillator microwave signals connected via a power divider to the radiating aperture, a reference phase shifter with a rotation angle sensor mounted on its axis, an indicator probe connected with a coordinate sensor, a microwave bridge, to the output of which a first amplitude detector is connected, as well as a recorder connected respectively to a coordinate sensor and a rotation angle sensor, characterized in that, in order to improve measurement accuracy, between the second output of the power splitter and the third recorder input are entered A signal splitter connected in series, a second amplitude detector and a comparator analyzer, the second input of the comparator analyzer connected to the output of the first amplitude detector torus, and the second output of the signal splitter through the reference phase coupler 5 is connected to the first input of the microwave bridge, the second input of which is connected to the output of the indicator probe. Sources of information taken into account in the examination -, 1. USSR Copyright Certificate № 426203, cl. G 01 R 29/08, 1974.