JPH0548314A - Aircraft mounted mobile receiver - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mobile reception device for low-cost, space-saving, lightweight aircraft mounting. [Structure] The multiple planar antennas that make up the array antenna (1) that receives incoming radio waves are composed of the rear surface of the body part (5) that is made of a radio wave-transmissive material or a material that does not have radio wave transmission. In addition to sticking to the surface of the body part in conformity with the shape of those surfaces, the outputs of the plurality of planar antennas can be combined in phase.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile receiver mounted on an aircraft.

[0002]

2. Description of the Related Art As a conventional technique for receiving satellite broadcasting, for example, Kenji Omaru: "Mobile Satellite Broadcasting Receiver", September of Broadcasting Technology, pp. 119-123, 1990 is introduced. This device is a mobile receiver that uses both a mechanical tracking type monopulse antenna and an electronic tracking type in-phase combination. In this system,
One of the eight planar antennas is shared as a monopulse antenna. The satellite broadcast waves received by the eight planar antennas are converted into IF frequencies by the BS converter and input to the in-phase combining circuit. Further, the output of the plane antenna shared with the monopulse antenna is frequency-converted by the BS converter having a common local signal, and then input to the monopulse receiver and mechanically controlled so that the plane antenna always faces the satellite. .. In the in-phase combining circuit, one of the outputs of the eight planar antennas is used as a phase reference signal, and the two outputs are combined in phase so that the phase difference between them becomes zero. As a result, the receiving device mechanically and electronically tracks the satellite direction.

[0003]

When a mobile receiving device such as satellite broadcasting is mounted on an aircraft, the installation location of the device is limited to the inside of the main wing or the like due to safety problems of the aircraft and space problems. Such a place is not a good place for radio wave propagation, and if the antenna of a satellite broadcast mobile receiving device already developed and put into practical use for trains etc. is diverted as it is, the reception range is limited and the antenna diameter is limited. This makes it difficult to design and mount the device. Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and to provide an electronic tracking type mobile receiving device for mounting on an aircraft, which is suitable for mounting on an aircraft.

[0004]

In order to achieve this object, in the mobile receiver for mounting on an aircraft of the present invention, in particular, a plurality of plane antennas, each of which can be regarded as one antenna in practice, are mounted array antennas for receiving incoming radio waves. As a block, on the back surface of the aircraft body part made of a material having radio wave permeability or on the surface of the aircraft body part made of a material having no radio wave transmission, along with the shape of those surfaces, The present invention is characterized in that the phases of the output signals of the plurality of planar antenna blocks are controlled to perform in-phase synthesis.

[0005]

EXAMPLE When the mobile receiver of the present invention is installed inside the main wing, the FRP is provided on the upper surface of the main wing where the satellite broadcast wave is well received.
An in-phase combining circuit in which the outputs of a plurality of planar antenna blocks that make up the antenna are integrated with the antenna by creating and mounting a mounting array antenna on the back surface of the resin-transmissible portion to match the shape of that portion. Alternatively, the satellite broadcast wave can be automatically tracked over almost the entire sky by inputting to the same circuit placed in another place. Of course, if the shape of that part is a gentle curved surface, you can use a mechanically flexible array antenna to follow the surface, and if there is a steep curved surface, use a planar antenna block as a unit Place along
It is also possible to configure an array antenna.

Therefore, in the mobile receiving apparatus according to the present invention, the tracking is not performed by the machine but is performed electronically, which is excellent in cost and space. Also, when the antenna can be mounted on the surface of the aircraft, since a lightweight and low-profile planar antenna block is used, the planar antenna block is attached to the surface according to its surface shape, and the output of each planar antenna block is By inputting to the in-phase synthesis circuit placed in another place, it is possible to perform reception while automatically tracking over a wide range without affecting the safety of the aircraft.

The present invention will be described below with reference to the accompanying drawings. 1 shows a first embodiment of the present invention. The apparatus shown in FIG. 1 includes an array antenna 1 for satellite broadcasting reception, outputs 2 of N planar antenna blocks constituting the array antenna, an in-phase combining circuit 3 and an output terminal 4 thereof. I am. Each plane antenna block of the array antenna 1 is an FRP on the upper surface of the aircraft wing.
The part made of resin is arranged along the surface such as sticking to the back surface so as to be in close contact, and receives the broadcast wave through the FRP resin 5, respectively. As described above, since the antenna is composed of a plurality of planar antenna blocks, it can be arranged so as to match the shape of the back surface of the main wing, and there is no problem even if the sticking place is oblique. The outputs of the N planar antenna blocks forming the array antenna 1 are input to the in-phase combining circuit 3. Inside the in-phase combining circuit 3, by using the output of one planar antenna block as a phase reference and combining the phases of the other outputs in accordance with it, the broadcast wave can be tracked over almost the entire sky.

FIG. 2 showing a second embodiment of the present invention is one in which the array antenna 1 in the first embodiment is attached to the surface of the body. Since the mobile receiving device according to the present invention is of an all-electronic type, it can be configured to be lightweight,
For example, since the array antenna 1 can be attached after being formed according to the shape of the airframe, it does not cause unnecessary irregularities on the surface of the airframe of the aircraft and does not affect the safety of the aircraft at all. In the first and second embodiments, the array antenna for receiving satellite broadcasting is illustrated, but if the plane antenna for satellite communication is used, the present invention can be used as a mobile receiving device for inter-satellite communication. You can

[0009]

In the mobile receiving device according to the present invention, the array antenna is configured by a plurality of planar antenna blocks, so that the array antenna can be arranged according to the shape of the attached body.
Attach it to the back or front of the aircraft,
By performing the in-phase combining process on the output of each plane antenna block, it is possible to provide a lightweight and space-saving mobile receiving device mounted on an aircraft.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a first embodiment of the present invention,
(a) is a plan view of an aircraft to which the device of the present invention is attached as seen from above, and (b) is a sectional view of the portion.

FIG. 2 is a view for explaining the second embodiment of the present invention and is a side view of an aircraft to which the device of the present invention is attached.

[Explanation of symbols]

 1 array antenna 2 each plane antenna output 3 in-phase synthesis circuit 4 output terminal 5 FRP resin

Claims (1)

[Claims] 1. A mobile receiving device for mounting on an aircraft,
A plurality of plane antenna blocks that make up the on-board array antenna that receives incoming radio waves are attached to the back of the aircraft body part made of a radio wave permeable material or the aircraft body part made of a non-radiation permeable material. On its surface,
A mobile receiving device for mounting on an aircraft, which is arranged along the shapes of these planes, and is configured so as to control the phases of the output signals of the plurality of plane antenna blocks to perform in-phase combining.