JPH056377U - Radome test equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a radome test device that improves the test efficiency by installing a reflector so that the wave front of the RF wave for the radome test becomes a plane wave and making the installation location of the device small. [Structure] The radome 1 is attached to a rotating machine 2, and a rotation controller 3 is connected. Install the antenna 6 in the radome 1,
The servo amplifier 8 is connected via the receiver 7. The microwave transmitter 4 is connected to the horn 5. The horn 5 and the reflector 13 are attached to the reflector / horn zero-point follower 14, and the reflector / horn zero-point follower 14 is attached.
Is connected to the servo amplifier 8 and the data processor 10. The data processor 10 is also connected to the rotating machine 2, the receiver 7, the beam deviation recorder 11, and the pattern recorder 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radome test device for measuring radome characteristics.

[0002]

[Prior Art]

 FIG. 2 is a view showing a conventional radome test apparatus, in which 1 is a radome, 2 is a rotating machine, 3 is a rotation controller, 4 is a microwave transmitter, 5 is a horn, 6 is an antenna, and 7 is a receiver. , 8 is a servo amplifier, 9 is a horn zero-point follower, 10 is a data processor, 11 is a beam deviation recorder, and 12 is a pattern recorder.

Next, the operation will be described. The RF wave generated by the microwave transmitter 4 is radiated from the horn 5 on the horn zero follower 9 and received by the antenna 6 through the radome 1. This received signal contains the difference signal between the electrical boresight and the mechanical boresight and the received strength, which are amplified by the receiver 7. The amplified difference signal between the electrical boresight and the mechanical boresight is input to the servo amplifier 8 and the reception intensity is input to the data processor 10.

The servo amplifier 8 drives the horn 5 by the horn zero-point follower 9 so that the difference signal between the electric boresight and the mechanical boresight becomes zero. This measurement is performed for each set angle by rotating the radome 1 installed on the rotating machine 2 by setting the angle with the rotation controller 3. Then, the angle information of the movement of the horn 5 at each set angle is input to the data processor 10.

Further, the angle information of the radome 1 is input to the data processor 10 from the rotary machine 2. The data processor 10 processes the input information, outputs the beam deviation amount of the radome 1 to the beam deviation recorder 11, and outputs the pattern characteristic of the radome 1 to the pattern recorder 12. The beam displacement recorder 11 records the beam displacement, and the pattern recorder 12 records the pattern characteristics.

[0006]

[Problems to be solved by the device]

 Since the conventional radome test equipment is configured as above, the distance between the horn and the radome and antenna must be increased in order to obtain the plane wave required for the radome test because the wave front of the RF wave radiated from the horn is a curved wave. It has to be taken for a long time, and it has been difficult to carry out indoors in the X band frequency band, for example. In addition, when it is carried out outdoors, obstacles, external radio waves, reflected waves, etc. will greatly affect the efficiency of the test.

The present invention has been made to solve the above problems, and by using a reflector, a radome test device can be installed in a small scale and the test can be performed efficiently. Aim to get.

[0008]

[Means for Solving the Problems]

 The radome test apparatus according to the present invention is provided with a reflector that converts the wavefront of an RF wave from a curved wave into a plane wave and reflects it.

[0009]

[Action]

 The radome test device according to the present invention can be installed in a small scale. This also makes it easier to install indoors and allows stable measurements without being affected by weather or obstacles.

[0010]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 to 8 and 10 to 12 are almost the same as those of the conventional device. Reference numeral 13 is a reflector, and 14 is a reflector horn zero-point follower.

In FIG. 1, the RF wave output from the microwave transmitter 4 is radiated from the horn 5 toward the reflector 13. The wavefront of the RF wave at this time is a concentric curved surface wave, but is converted into a plane wave when reflected by the reflector 13. The angle formed by the wavefront of this plane wave and the radome 1 and the antenna 6 is set to 90 degrees in advance. The antenna 6 and the reflector 13 are arranged concentrically around the antenna 6.

Next, the rotation controller 3 rotates the rotating machine 2 to which the radome 1 is attached, and the antenna 6 receives the RF wave. When the RF wave is transmitted through the radome 1, it is refracted due to the characteristics of the radome and the wavefront angle changes. As a result, when the electrical boresight is deviated from the mechanical boresight, the error signal amplified by the receiver 7 is input to the servo amplifier 8. The servo amplifier 8 changes the angle between the reflector 13 and the horn 5 by the reflector / horn zero point follower 14 so that the error signal becomes zero. By changing the reflector 13 and the horn 5, the angle of the wavefront of the RF wave reflected by the reflector 13 is changed. This change in angle is proportional to the characteristics of the radome 1 and is input to the data processor 10. Further, the angle information of the radome 1 is input to the data processor 10 from the rotating machine 2. The data processor 10 processes the input information and outputs the beam deviation amount of the radome 1 to the beam deviation recorder 11. Further, the data processor 10 processes the reception intensity signal from the receiver 7 and the angle information from the rotating machine 2 and outputs the pattern characteristics of the radome 1 to the pattern recorder 12. The beam deviation recorder 11 records the beam deviation, and the pattern recorder 12 records the pattern characteristics.

[0013]

[Effect of the device]

 As described above, according to the present invention, the reflector operates so as to be converted into a plane wave and reflected, so that there is an effect that the installation location of the device is small.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a conventional radome test apparatus.

[Explanation of symbols]

 1 radome 2 rotary machine 3 rotation controller 4 microwave transmitter 5 horn 6 antenna 7 receiver 8 servo amplifier 9 horn zero-point follower 10 data processor 11 beam deviation recorder 12 pattern recorder 13 reflector 14 reflector horn zero-point follower

Claims (1)

[Claims for utility model registration] Claims: 1. A radome test apparatus for measuring a beam excursion, which is one of the performances of a radome, and a rotating machine that rotates a radome and outputs a rotation angle. A rotation controller for controlling, a microwave transmitter for generating an RF wave of a radome test radio wave, a horn for radiating the RF wave, and a reflector for changing the wavefront of the RF wave from the horn from a curved surface wave to a plane wave. And an antenna that receives a plane wave from this reflector and outputs a difference signal between the electrical boresight and the mechanical boresight and the reception strength, a receiver that amplifies and outputs the signal from this antenna, and the electrical boresight And the mechanical boresight difference signal is inputted and the servo amplifier which amplifies into the signal which drives the above-mentioned reflector and horn, and these electrical boresight and machine Driving the reflector and horn so as to make the boresight difference signal zero, the reflector horn zero-point follower that outputs these angle information, and output the beam deviation amount of the radome by inputting the angle information, The data processing device outputs the radome pattern characteristic by the radome rotation angle output and the reception intensity output, a beam deviation recorder for recording the beam deviation amount, and a pattern recorder for recording the pattern characteristic. A radome test device characterized in that