JPS6072425A - System for indicating direction of antenna - Google Patents

Abstract

PURPOSE:To set easily and accurately an antenna in an optimum direction by providing a means for keeping the highest reception level in addition to a conventional reception level indicator and allowing to refer to the highest reception level kept by said means. CONSTITUTION:A received radio wave from an opposite radio equipment inputted via a path 30 becomes a reception electric signal at a reception section 2 via the antenna 1 whose direction is adjusted and set by a direction adjusting device 4, one of the received signals is inputted to the reception level indicator 3 similar to a conventional indicator, the reception level from the antenna 1 is displayed and the other reception signal is inputted to a peak value hold circuit 5. The highest reception level obtained by changing the antenna in various directions at the circuit 5 is kept among the level of the reception signals. The highest reception level is amplified by an amplifier 6 and displayed on a highest reception level indicator 7. In conducting the direction adjustment of the antenna, the antenna direction adjustment is tried in a direction where the reception level seems to be the highest at first while the display of the highest reception level indicator 7 is supervised, and after the highest value of the reception level is obtained, the direction of the antenna is adjusted so that the displayed value of the indicator 3 is coincident with the highest value by supervising the reception level indicator 3.

Description

[Detailed description of the invention] (a) Outside the technology of the invention i1! J The present invention relates to a method for adjusting the direction r'sa of opposing microwave or millimeter wave radio center lines.

(b) Technology background In recent years, microwave and millimeter wave wireless relay lines (
It is well known that this is widely used.

The reason why ultra-high frequency radio waves such as microwaves and millimeter waves are used in wireless relay lines is that they can transmit a large amount of information at once due to their high frequency, but it is also possible to use relatively small antennas with sharp directivity. And because of its thin directivity, it can be relayed over long distances with little mutual interference! There is a captain.

Therefore, when installing a radio relay line for microwaves or MI/IJ waves, the antennas at the two relay points have 8 lines with thin directivity facing each other, and the direction of the antenna for that purpose is 1. ′! 1 size is a medium-thin relay line. This is an extremely important task in maintaining sex.

Microwave and millimeter wave antennas are generally equipped with parabolic antennas using 1fJi reflectors, and the sharply directional beams of the antennas are used within a straight line-of-sight distance, just like light. The shape i"J 1/1: is expressed by the beam half-width, and the angle j is approximately 1.5 degrees for microwaves and approximately 1 degree for millimeter waves. For example, in the case of microwave, it is 20km to 50+++
, in the case of millimeter waves, approximately 1 to 10 depending on the propagation conditions due to weather etc.
km.

Therefore, in order to install a microwave or millimeter wave antenna on a relay line, the direction of the antenna between adjacent relay points must be determined optically or, if the relay distance is relatively long, by astronomical measurement or comparison with a map. The antennas are made to face each other by a method such as using an electromagnetic horn with a wide beam width, and then final fine adjustments are made in the direction of the antennas so that each receives the transmission power of the other party and obtains the maximum receiving sensitivity. . The present invention relates to this final fine adjustment of the direction of the midline.

(c) Prior Art and Problems FIG. 1 shows a system diagram of a conventional microwave or millimeter wave antenna direction adjustment means.

In FIG. 1, reference numeral 10 indicates a radio device in a receiving state for adjusting the direction of the antenna, 1 indicates the antenna, 2 indicates a receiving section, 3 indicates a reception level indicator, and 4 indicates a direction adjustment mechanism. Reference numeral 20 denotes a counterpart radio device facing the radio device 10, 22 a transmitter, 21 an antenna, and 30 a propagation path of microwaves or millimeter waves received by the radio device 10 from the radio device 20.

As mentioned in the section (b) Technical background above, the antenna 21
and A1 in the air are roughly facing each other, and Rikizono Seki! The transmission power from the aircraft 20 is input to the radio 10 via the path 20 to the extent that the antenna direction can be adjusted.
While monitoring the display on the reception level indicator 3, operate the direction adjustment mechanism 4 to change the direction of the antenna 1 little by little, find the antenna direction where the reception level indicator 3 indicates the highest value, and fix the antenna 1. It has been done in this way.

However, with the conventional method described above, the beam of the microwave or millimeter wave antenna is thin, so even if you find the highest reception level while changing the direction of the antenna, the antenna will not work properly if you move the antenna normally. There was a problem in that the direction quickly passed the optimal direction and it was difficult to accurately fix the direction to the highest value in a short time.

(d) Purpose of the Invention In view of the above-mentioned problems, the present invention provides means for maintaining the maximum reception level in addition to the conventional reception level indicator, and by referring to the maximum reception level held by the means,
The purpose is to easily and accurately set an antenna in an optimal direction. □(e) Structure of the invention The present invention provides microwave or
Antenna direction adjustment that finely adjusts the direction of the antenna by one radio device of the heat wave device receiving the transmission power of the other and changing the direction of the antenna of the one radio device to obtain the highest reception sensitivity. The means includes two reception level indicating means, one of which has a means for maintaining the highest reception level, and refers to the highest reception level □ maintained by the means. Then, the display of the other reception level indicating means is: 1. equal to the maximum reception level value. Therefore, the above-mentioned objects are fully achieved by the present invention. 1 (f) Embodiment of the Invention FIG. 2 is a system diagram showing the circuit configuration of an embodiment of the antenna direction indicating system using microwaves or 'ε ripple waves according to the present invention.
1 In FIG. 2, the reference numeral 4 in the direction of FIG. 7 amplifiers and 7 maximum reception level indicators.

The received radio waves from the other party's radio input via the path 30 pass through the antenna 1 whose direction is adjusted and set by the direction adjustment mechanism 4, and then are received by the receiver 2 as a received electrical signal (hereinafter abbreviated as received signal). ), one of the received signals is input to the conventional reception level indicator 3 to display the reception level from Tatechu I%!1, and the other of the received signals is input to the peak value hold circuit 5. .

The peak value hold 1° circuit 5 is a known peak value hold circuit that combines an operational amplifier with a diode and a capacitor, and the signal is the result of converting the antenna in various directions Kf in the peak value hold circuit 5. 1.

The highest reception level obtainable is maintained. The highest quality reception level is amplified by the amplifier 61, and the highest quality reception level value 7I:-
It is reset by a reset input shown by an arrow 8 in the field circuit 5. .

The present invention has a means for displaying the highest value of the reception level during the antenna direction adjustment as described above, so that when adjusting the antenna direction, first adjust the antenna direction in the direction where the reception level is expected to be the highest. After testing while monitoring the display on indicator 7 and reaching the highest reception level of '4U,
The reception level indicator 3 is monitored and the antenna direction controller h1.゛ Perform Δ adjustment.

(g) Effects of the Invention According to the present invention, it is possible to easily and accurately adjust the directions of the antennas of microwave or millimeter wave radios to make them face each other, and to improve the efficiency of the antenna direction adjustment work. This has an extremely large effect on improving the reliability of antenna direction adjustment.

[Brief explanation of the drawing]

FIG. 1 shows a system diagram of a conventional microwave or millimeter wave antenna direction adjustment means, and FIG. Shown in the figure. In all the figures, 10 is a radio device in a receiving state for adjusting the direction of the antenna, 20 is a radio device in a state of transmitting microwaves or S IJ waves opposite to the radio device 10, and 30 is a radio device 20. The propagation path of the microwave or Mi1,1 wave transmitted by the radio device 10 and received by the radio 10, ■ is the antenna, 2 is the receiver, 3 is the reception level indicator, 4 is the direction adjustment mechanism, and 5 is the peak value hold. 1'l゛i, 6 is an amplifier, and 7 is a maximum reception level indicator.

Claims (1)

[Claims] By having one radio of a microwave or 5+) wave radio with antennas facing each other receive the transmission (i power) of the other and changing the direction of the antenna of the one radio to obtain the highest reception sensitivity. , antenna direction 1' which performs fine adjustment of the direction of the antenna.
II. An antenna direction indicating system characterized in that the iL'J adjusting means includes two receiving level indicating means, and one of the indicating means has means for maintaining the highest receiving level.