JPH0693018B2 - Transceiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a transmitter / receiver that uses both radio waves and light waves.

[Conventional technology]

2. Description of the Related Art A transmitter / receiver that uses both a radio wave from a radar and infrared rays radiated from a heating element has been known in the past, and has both a target detection function with weatherproofness by radio waves and a highly accurate target detection function with infrared rays. It can be widely used.

Therefore, such a device is characterized in that both functions can be used simultaneously or can be switched, and it is desirable to be configured to sufficiently satisfy this feature.

Therefore, as disclosed in JP-A-53-15094 (Japanese Patent Publication No. 59-49554), an antenna for transmitting and receiving radio waves such as radar has a space in the center and a plurality of antenna elements. There has been proposed a configuration in which the optical elements are arranged in a plane and an optical system having a target detecting function by infrared rays is added to the space.

[Problems to be solved by the invention]

In the conventional transmitter / receiver as described above, the function of the optical system is significantly deteriorated due to the constraint that the optical system must be housed within a predetermined size and shape. On the contrary, if the size of the space is increased in order to improve the function of the lightwave system, the function of the radiowave system is significantly reduced. In addition, since the optical system is installed in the central space of the antenna, it is difficult to adjust and maintain the optical system, and there are many adverse effects of paralleling both systems having completely different frequency bands. I got it.

The present invention has been made to solve the above problems, and provides a transmitter / receiver suitable for simultaneous use and switching use of radio waves and light waves with a simple configuration without deteriorating the functions of both radio waves and light waves. The purpose is to get.

[Means for solving problems]

A transmitting / receiving device according to the present invention has a space portion provided at the center of an array antenna for radio waves arranged in a plane, an optical system for transmitting radio waves provided in front of the space portion, and an optical system having the same axis as the optical system. A detector for light waves is arranged above and in the space of the array antenna.

[Action]

In the present invention, the provision of an optical system for transmitting radio waves in front of the central space of the radio wave array antenna facilitates the adjustment and maintenance of the device, and also reduces the gain of the radio wave array antenna and side lobe performance. The influence on the performance of the radio system such as deterioration can be minimized, and even if both the radio system and the lightwave system are arranged in parallel, the functional deterioration of both systems can be suppressed.

〔Example〕

1 and 2 are views showing an embodiment of the present invention. In the figure, (1) is an array antenna composed of a plurality of radiating elements (11) and a feeding circuit (12), (2) is a duplexer, (3) is a transmitter, (4) is a receiver, and (5). ) Is a signal processor, (6) is an optical system provided in front of a space (10) formed in the center of the array antenna (1), and (7) is a space (10) of the array antenna (1). The detector for light wave installed in the above, (8) is an amplifier, and (9) is a signal processor.

A radio wave signal of a radar or the like generated by the transmitter (3) is supplied to the array antenna (1) by the transmission / reception switch (2) and is radiated into space. On the contrary, the reflected signal from the target passes through the route opposite to that at the time of transmission, and the receiver (4) is switched by the duplexer (2).
Then, the target signal is detected by the signal processor (5).

On the other hand, a light wave such as an infrared ray radiated from a target is converted into an electric signal by a light wave detector (7) through an optical system (6) provided in front of the central space (10) of the array antenna. To be done. Of course, the light detected by the light wave detector (7) may be visible light, infrared light, or ultraviolet light, and in any case, light information from the target can be detected. The optical signal from the target detected by the light wave detector (7) and converted into an electric signal is amplified by the amplifier (8), and the target signal is detected by the signal processor (9).

Since the optical system (6) is provided in the center of the array antenna (1) in the front, adjustments such as axis alignment of the optical system (6) and maintenance can be easily performed. In addition, since the lenses and the like that make up the optical system (6) are usually dielectrics, the radio waves used by the array antenna (1) located behind the optical system (6) are transmitted, which adversely affects the antenna beam, for example, , It is possible to reduce the gain decrease and the side lobe increase.

Moreover, since the radio wave system and the light wave system function independently of each other and there is little mutual interference, the practical advantage is large.

In the example shown in FIG. 1, the array antenna (1) and the space in the center of the array antenna (1) are circular, but the optical system (6) must be located in the center of the array antenna (1). However, it does not have to be circular,
It can also be composed of polygons.

In the above description, the light wave detected by the light wave detector (7) not only receives the light wave radiated directly from the target but also reflects the light reflected from the target emitted from the light transmitter installed at another position. It may receive light.

〔The invention's effect〕

As described above, according to the present invention, the optical system is arranged in front of the space provided in the center of the array antenna for radio waves arranged in a plane, and the detector for the light wave is arranged in the space. With such a simple configuration, there is an effect that it is possible to provide a transmitter / receiver that can stand side by side without degrading the functions of both the radio wave and light wave systems.

[Brief description of drawings]

1 and 2 are diagrams showing an embodiment of a transmitting / receiving apparatus according to the present invention. In the figure, (1) is an array antenna, (2) is a duplexer,
(3) is a transmitter, (4) is a receiver, (5) is a signal processor, (6) is an optical system, (7) is a detector for light waves, (8)
Is an amplifier, (9) is a signal processor, (10) is a space part, (1
1) is a radiating element and (12) is a feeding circuit. In the drawings, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

[Claims] 1. An array antenna having a space in the center and a plurality of radiating elements arranged in a plane, a transceiver connected to the antenna for transmitting and receiving radar signals, and the space for the antenna. An optical system which is provided in front of the unit and which transmits radio waves; and a detector which is provided on the same axis as the optical system and is provided in the space of the antenna and which detects a light wave received through the optical system. A transmission / reception device comprising: