JPS59108405A - Antenna device - Google Patents

Abstract

PURPOSE:To obtain an antenna device with an increased directivity and gain for observing the ionized layers by constituting >=2 triangle antennas where the base having a feeding point is shared in common. CONSTITUTION:In a travelling wave feeding antenna where a triangle is constituted by using conductors 1, 2, 3, 4 longer than the wavelength, its vertex is provided with a terminating load 5 and its base is provided with a feeding point 6, its bases 3, 4 are provided in parallel with a ground 7, a triangle antenna is constituted by sharing the bases 3, 4 in common with conductors 8, 9 longer than the wavelength and a terminating load 10. Each main beam from the conductors 1, 2, 8, 9 is matched to a normal taken above the ground 7 by selecting suitably the length of the conductors 1, 2, 8, 9, an angle to the ground 7, and phase adjusters 11, 12, allowing to increase the directivity and the gain.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna device for observing the ionosphere.

As a conventional glazed antenna device, as shown in Fig. 1,
Conductor wire (+) longer than the wavelength, +21. (al,
(Construct a triangle using 41, and the terminal load (5) at the vertex
established.

There was an antenna device in which a traveling wave feeding antenna with a feeding point (6) at the bottom was placed so that the bottom sides (31, (4)) were parallel to the earth (7). However, this antenna device was (There was a drawback that the main beam was determined only by the radiation from 21, and a high directional gain could not be expected.

This invention was made to improve this drawback, and will be described in detail below with reference to the drawings.

FIG. 2 is a schematic configuration diagram of an embodiment of the present invention, (1
) to (forces are the same as those in FIG. 1. Also, FIG. 2 shows the plane including the conductors i11. +21. (31, +41). (8).

(9) is a conductor that is long compared to the wavelength, α1 is a terminal load, 0υ, +12 is a phase adjuster.

As is already well known, when a traveling wave power is fed through a single conductor that is longer than the wavelength, the directivity in any plane containing the conductor is such that there are two main beams symmetrical about the current traveling direction. do. Furthermore, the direction of this main beam is the longer the conductor.

It is known that the current approaches the direction of travel.

Therefore, the directivity of this antenna device is
．． By appropriately selecting the length of (21, (8), (9), the angle with respect to the ground, and the phase adjuster αυ, a), it is possible to The beam can be aligned in the direction of the normal line taken above the ground.

Directivity gain can be increased.

Here, the main binim from conductor (3), (41) is canceled by the image of the earth.

Although the embodiment has been described in which one or more of the conductive wires are two triangular shapes that share a base, a configuration of three or more triangular conductors that share a base may also be used.

Further, each terminal load may be provided separately or may be shared with each other. Furthermore, although the case of transmission has been described, it may also be used in the case of reception.

As described above, according to the present invention, the directivity gain can be increased by the configuration consisting of two or more triangles sharing a base, and the effect is significantly increased when used as an antenna for observing the ionosphere. Hey.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a conventional antenna device for observing the ionosphere, and FIG. 2 is a schematic diagram of an embodiment. In the figure, (+l, (21, (31, (4), (8)
, (9) is a conductor. (5), ill is the terminal load, f+υ, 0 is the phase adjuster, (6) is the feeding point, and (7) is the ground. In FIG. 2, the same or corresponding parts are designated by the same reference numerals. Agent Makoto Kuzuno

Claims (3)

[Claims] (1) Construct a triangle with three conductors that are longer than the wavelength,
In the antenna device, a triangular antenna having a feeding point on the base of the triangle and a terminal load on an apex not on the base is installed above the ground plane, and the base is installed parallel to the ground plane. An antenna device characterized in that three or more of the triangular antennas share the same base. (2) The antenna device according to claim (1), wherein the two or more triangular antennas are located in the same plane perpendicular to the ground plane. (3) The antenna device according to claim 11, characterized in that a phase adjuster is attached to the two or more triangular antennas.