JPH05243838A - Antenna equipment - Google Patents

Abstract

PURPOSE:To set a first and a second conductor plates at the same potential, and to set that which is in an asymmetrical state on the structure at an electrically symmetrical state by providing a short circuit means for short-circuiting a first and a second conductor plates through a first and a second dielectric substrates. CONSTITUTION:A through-hole 9 being a means for short-circuiting conductor plates 3, 4 being a first and a second ground conductor surfaces is provided in a position running along a boundary of slot lines 5, 6. The wall surface of this through-hole 9 is plated, and becomes a plated layer of a conductive body. Therefore, the conductor plates 3, 4 in the vicinity of the boundary of the slot lines 5, 6 and the conductor plates 3, 4 are short-circuited by the plated layer of the through-hole 9 and become the same potential. Accordingly, electromagnetic fields generated in a first and a second slot lines 5, 6 become the same, and directivity of a horizontal polarized wave in a vertical plane becomes symmetrical.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device in which directivity of horizontal polarized waves is symmetrical in a vertical plane.

[0002]

2. Description of the Related Art FIGS. 5 and 6 are public utility model publications, Sho 55.
14 is a diagram of a strip line shown in No. 14389, "Strip line type diode phase shifter", in which 1 is a rectangular first dielectric substrate and 2 is the first dielectric substrate 1. A second dielectric substrate 3 having the same shape and bonded so as to face the substrate 1 is the first dielectric substrate 1 described above.
A first conductor plate as a ground conductor surface provided on the outer surface of the
4 is a second conductor plate serving as a ground conductor surface provided on the outer surface of the second dielectric substrate 1, and 5 is a first slot line,
Reference numeral 6 is a second slot line, and 7 is a strip line which is provided between the first and second dielectric substrates 1 and 2 and which excites the slot lines 5 and 6 by electromagnetic coupling.

FIG. 7 is a diagram showing a strip line portion and a slot portion for explaining the operation of the antenna of FIGS. In the open-ended strip line, the magnetic field is maximum from the open end 7a, which is the end of the strip line 7, to the side of the strip line of ¼ wavelength, and the slots provided in the conductor plates 3 and 4 as ground conductor surfaces of this portion. Radio waves are strongly coupled to the short-circuited end side of the line. The electric field component of the radio wave becomes a traveling wave between the slots, and the radio wave is radiated from the open end of the trumpet-shaped slot in which the line width is gradually expanded. Since the slot has the above-mentioned shape, it exhibits uniform radiation characteristics in a wide frequency range. In such a stripline / slotline conversion, the stripline and the slotline are not in contact with each other, and the contact failure is less of a problem than feeding the slotline by a coaxial line that requires contact, so that reliability is improved and the number of processed This has the effect of reducing costs by reducing

However, in the conventional antenna device, as shown in FIG. 8, it is necessary to provide the strip line 7 on one of the dielectric substrates 1 at the time of manufacturing, and the two dielectric substrates 1 and 2 are required.
Since they are joined by interposing the adhesive sheet 8 therebetween, they have an asymmetric structure in the plane including the antenna, and there is a problem that the directivity of the horizontal polarization in the vertical plane in the front direction is asymmetric.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a directivity of horizontal polarization in a vertical plane without changing a slot shape having a wide band characteristic. The object of the present invention is to obtain an antenna device in which is symmetrical with respect to the front direction.

[0006]

In the antenna device according to the present invention, the directivity in the front direction of the horizontally polarized wave in the vertical plane is made symmetrical by short-circuiting the two conductor plates.

[0007]

The first and second conductor plates have the same potential, and the structurally asymmetrical state is brought into an electrically symmetrical state.

[0008]

EXAMPLES Example 1. FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, and 3 to 8 show the same as the conventional case shown in FIGS. Reference numeral 9 is a through hole as a short-circuit means for short-circuiting the first and second conductor plates 3 and 4 as the ground conductor surface. The through hole 9 is provided at a position along the boundary between the slot lines 5 and 6, and vertically penetrates the dielectric substrates 1 and 2 as shown in FIG.

The wall surface of the through hole 9 provided from the first conductor plate 3 to the second conductor plate 4 is plated so that a conductor plating layer 9a is provided. This plating layer 9a short-circuits the first and second conductor plates 3 and 4.

Next, the operation will be described. The electromagnetic coupling between the strip line and the slot line is the same as the conventional one. Since the first and second conductor plates 3 and 4 in the vicinity of the boundaries between the slot lines 5 and 6 and the conductor plates 3 and 4 are short-circuited by the plating layer 9a of the through hole 9 as a short-circuiting means and have the same potential, The electromagnetic fields generated in the first and second slot lines 5 and 6 are the same, and the directivity of horizontal polarization in the vertical plane is symmetrical.

Embodiment 2. FIG. 3 is a schematic configuration diagram showing another embodiment of the antenna device according to the present invention. The structure of the through hole 9 is similar to that of the first embodiment. Slot line 5,6
In the slot shape with the circular portion 10 provided at the short-circuit end of
The short-circuited end of the slot line viewed from the strip line is open regardless of the frequency. In this case, the through hole 9 is also provided on the outer peripheral side of the circular portion 10.

Embodiment 3. FIG. 4 shows another embodiment of the antenna device according to the present invention. Instead of the through holes provided in Examples 1 and 2, the dielectric substrates 1 and 2 are cut along the outer peripheries of the trumpet-shaped slot lines 5 and 6, and the wall surfaces of the cut portions are plated to form the plating layer 11 To provide. However, the portions corresponding to the strip line 7 are left so that the strip line and the slot line are electromagnetically coupled, and the slot lines 5 and 6 are provided on the surface thereof. The reason why the dielectric substrates 1 and 2 are cut off is that the same function as that of providing a through hole is fulfilled, and the plating layer 11 short-circuits the first and second conductor plates 3 and 4 to keep the same potential. Is set to.

[0013]

As described above, according to the present invention,
Since the first and second conductor plates on the outer surfaces of the first and second dielectric substrates bonded to each other are short-circuited via the first and second dielectric substrates, Since the potentials of the conductor plates can be set to the same potential and can be electrically symmetrical, the directivity in which the horizontal polarization in the vertical plane is symmetrical can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of an antenna device according to the present invention.

FIG. 2 is a sectional view showing a main part of the embodiment shown in FIG.

FIG. 3 is a schematic view showing another embodiment of the antenna device according to the present invention.

FIG. 4 is a schematic view showing another embodiment of the antenna device according to the present invention.

FIG. 5 is a plan view showing an example of a conventional antenna device.

FIG. 6 is a cross-sectional view showing an example of a conventional antenna device.

FIG. 7 is a diagram illustrating an operation principle when power is supplied to a slot line provided on two conductor plates by electromagnetic coupling with a strip line.

FIG. 8 is a cross-sectional view showing a method for assembling a conventional antenna device.

[Numerical invention] 1 first dielectric substrate 2 second dielectric substrate 3 first conductor plate 4 second conductor plate 5 slot line 6 slot line 7 feeding strip line 8 adhesive sheet 9 through hole 9a plating layer 10 Circular slot line 11 Plating layer

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[Procedure amendment]

[Submission date] September 11, 1992

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[0006]

An antenna device according to the present invention is a strip line between a first dielectric substrate and a second dielectric substrate.
On the outer surface of each of the first and second dielectric substrates.
Short the ends, gradually increase the width from this shorted end, and
In, in the configuration that intersects with the above strip line,
Cover the first and second conductor plates having slots that are open ends.
In the wearing antenna device, the first and second conductors are provided.
By shorting the body plates through the first and second dielectric substrates, the directivity in the front direction of the horizontally polarized wave in the vertical plane is made symmetrical.

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Embodiment 2. FIG. 3 is a schematic configuration diagram showing another embodiment of the antenna device according to the present invention. The structure of the through hole 9 is similar to that of the first embodiment. Slot line 5,6
The short-circuited end of No. 2 is a circular slot line 10, and the short-circuited end of the slot line viewed from the strip line is open regardless of the frequency. In this case, the through hole 9 is also provided on the outer peripheral side of the circular portion 10.

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[Description of Reference Signs] 1 first dielectric substrate 2 2nd dielectric substrate 3 first conductor plate 4 second conductor plate 5 slot line 6 slot line 7 feeding strip line 7a open end 8 adhesive sheet 9 through hole 9a plating layer 10 circular slot line 11 plating layer

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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Matsunaga 5-1-1 Ofuna, Kamakura-shi Electronic Systems Research Center, Mitsubishi Electric Corporation

Claims (1)

[Claims] 1. A strip line is interposed between first and second dielectric substrates, and a portion corresponding to the strip line is a short-circuited end on the outer surface of the first and second dielectric substrates. An antenna device comprising a first and a second conductor plate having a slot line whose width is gradually expanded from the short-circuited end and whose tip is an open end. An antenna device comprising short-circuiting means for short-circuiting via the first and second dielectric substrates.