JPH07321541A - Primary radiator - Google Patents

Abstract

PURPOSE:To accurately and simply mount a patch antenna element board onto the primary radiator. CONSTITUTION:A projection is provided to both sides of a 1st patch antenna element board 13 and a recessed part corresponding to the projection is provided on a depth side wall face of a circular waveguide 12. The 1st patch antenna element board 13 is set at a right angle to the circular waveguide 12 and the projection of the 1st patch antenna element board 13 is inserted into the recessed part of the circular waveguide 12 and the recessed part of the circular waveguide 12 is used to tentatively fix the 1st patch antenna element board 13. Then one side of a board 14 including a preamplifier is in face contact with the depth of the circular waveguide 12 and the board 14 is screwed to a board container part 15 of a circularly polarized wave/linearly polarized wave converter 10 with a screw 16, then a rear side of the 1st patch antenna element board 13 is in press contact with one side of the board 14 and tightened altogether, then the 1st patch antenna element board 13 is fixed at a correct position at the depth of the circular waveguide 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcasting receiving antenna, and more particularly to a mounting structure for a patch antenna element substrate for converting circularly polarized waves into linearly polarized waves.

[0002]

2. Description of the Related Art A receiving device for receiving radio waves from satellite broadcasts or the like focuses the radio waves on a parabola and receives them by a primary radiator of a circular polarization / linear polarization converter to convert the circular polarization into linear polarization. It is converted, and further converted to a frequency of about 1 GHz and sent to the receiver. As shown in FIG. 7, a conventional primary radiator of a circular polarization / linear polarization converter includes a patch antenna element substrate 2 and an adhesive 3 on a right side surface of a substrate 1 including a preamplifier.
Bonded with, and the substrate storage part 5 of the circular polarization / linear polarization converter 4
Then, the patch antenna element substrate 2 is at a right angle to the circular waveguide 7 of the primary radiator 6, and the substrate 1 is fixed with screws 8 so that the center of the circular waveguide 7 and the center of the patch antenna element substrate 2 are aligned. Was. The above method requires the work of adhering the patch antenna element substrate 2 to the substrate 1 including the preamplifier, and positioning the center of the circular waveguide 7 of the primary radiator 6 with the center of the patch antenna element substrate 2. It took a lot of work.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to attach the patch antenna element substrate to the primary radiator accurately and easily.

[0004]

In order to solve the above-mentioned problems, according to the present invention, both sides of the first patch antenna element substrate for delaying the electric field component phase of the circularly polarized wave of the radio wave from satellite broadcasting etc. by 90 degrees are provided. A convex portion is provided, and a recess is provided on the inner side wall surface of the circular waveguide at a position corresponding to the convex portion, so that the first patch antenna element substrate is perpendicular to the circular waveguide, and the circular waveguide is formed. When the convex portion of the first patch antenna element substrate is inserted into the recess provided in the wave tube and the substrate including the preamplifier is locked in the inner portion of the circular waveguide, the substrate including the preamplifier is There is provided a primary radiator characterized in that the first patch antenna element substrate is pressure-contacted on one surface to be fastened together.

[0005]

According to the above construction, the convex portions are provided on both sides of the first patch antenna element substrate, and the concave portions are provided at the positions corresponding to the convex portions on the inner side wall surface of the circular waveguide. The first patch antenna element substrate is made perpendicular to the circular waveguide, and the convex portion of the patch antenna element substrate is inserted into the recess of the circular waveguide, and the first patch antenna element substrate is inserted into the recess of the circular waveguide. Temporarily fix. Next, when one surface of the board containing the preamplifier is brought into contact with the inner part of the circular waveguide and the same board is screwed to the board housing part of the circular polarization / linear polarization converter, The back surface of the first patch antenna element substrate is pressure-welded and co-tightened to fix the first patch antenna element substrate at the correct position in the inner part of the circular waveguide.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, 10 is a circular polarization / linear polarization converter, which is composed of a horn-shaped primary radiator 11, a circular waveguide 12, a first patch antenna element substrate, and the like. 1
Reference numeral 3 is a first patch antenna element substrate, which delays the phase of the electric field component of the incident circularly polarized wave by 90 degrees to convert it into a linearly polarized wave. Reference numeral 14 denotes a substrate including a preamplifier, which is composed of a slot or the like for taking a linearly polarized electromagnetic wave into the preamplifier.
Reference numeral 15 denotes a substrate housing unit, which fixes and houses the substrate 14 including the preamplifier in the substrate housing unit with a screw 16.

As shown in FIG. 2, a circular waveguide 12 is provided inside a horn-shaped primary radiator 11, and two recesses 17 are provided at opposite positions on the inner side wall surface thereof. There is. As shown in FIG. 3, a substantially rectangular pattern 18 is formed on the front surface of the circular first patch antenna element substrate 13,
The convex portions 1 are formed on both sides of the first patch antenna element substrate 13.
9 is provided. As shown in FIG. 4, the substrate 14 including the preamplifier is substantially quadrangular and each corner has a hole for locking, and the substrate 14 is provided with a slot, a preamplifier and the like.

The above structure will be described with reference to FIG. The first patch antenna element substrate 13 is placed in the substrate housing portion 15
From the direction of the circular waveguide 12 to the inside of the circular waveguide 12, and the convex portion 19 of the first patch antenna element substrate 13 is inserted into the recess 17 of the sidewall of the circular waveguide 12, and the antenna element substrate 13 is inserted. Is temporarily fixed at the inner part of the circular waveguide 12 so as to be perpendicular to the axis of the circular waveguide 12. Next, the substrate 14 including the preamplifier is placed at a predetermined position of the substrate housing portion 15, and the front surface of the substrate 14 is brought into contact with the back surface of the first antenna element substrate 13. Then, the substrate 14 is placed in the substrate storage unit 1.
5 is locked with a screw 16. Then, the back surface of the first patch antenna element substrate 13 is pressed against the front surface of the substrate 14 to
The patch antenna element substrate 13 is fixed to the inner part of the circular waveguide 12. As a result, the first patch antenna element substrate 1
Reference numeral 3 is perpendicular to the axis of the circular waveguide 12, and the central axes of both are the same.

In another embodiment, as shown in FIG. 5, two patterns 2 are provided on both sides of the second patch antenna element substrate 20.
6, the dummy substrate 2 having the same shape as the second patch antenna element substrate 20 and having no pattern as shown in FIG.
Prepare 3. Then, the second patch antenna element substrate 20 is first inserted into the inner portion of the circular waveguide 12 in the manner of temporarily fixing the first patch antenna element substrate 13 described above to the inner portion of the circular waveguide 12. Next, the dummy substrate 23 is inserted to make a double stack. Then, if the substrate 14 including the preamplifier is locked in the substrate housing portion 15 with the screw 16, the second patch antenna element substrate 20 and the dummy substrate 23 are pressed against each other on the front surface of the substrate 14 including the preamplifier, and circular waveguides are formed. The tube 12 is fixed at a predetermined position in the inner part. Second patch antenna element substrate 2
By stacking 0 and the dummy substrate 23 in two layers, the band of the axial ratio of the circularly polarized wave can be made wider than that when the first patch antenna element substrate 13 (single-sided pattern) is used.
Incidentally, instead of receiving the circularly polarized wave, if a linearly polarized patch antenna element is used to receive the linearly polarized wave, it can be used as a primary radiator for receiving the linearly polarized wave.

[0010]

As described above, according to the present invention, the first patch antenna element is formed by forming the depression on the inner side wall surface of the circular waveguide and inserting the convex portion of the first patch antenna element substrate into the depression. Since the substrate is positioned and the back surface of the first antenna element substrate is pressed and fixed to one surface of the substrate including the preamplifier, the first patch antenna element substrate is adhered to the substrate including the preamplifier as in the past. The need for
In addition, there is an advantage that the center of the circular waveguide of the primary radiator and the center of the first patch antenna element substrate do not need to be positioned.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of a primary radiator of the present invention, in which A is a front view and B is a sectional view.

FIG. 2 is an external view of a primary radiator body of the present invention, in which A is a sectional view and B is a front view.

FIG. 3 is an external view of a first patch antenna element substrate of the primary radiator of the present invention, where A is a front view and B is a side view.

FIG. 4 is an external view of a substrate including a preamplifier of a primary radiator of the present invention, where A is a front view and B is a side view.

FIG. 5 is an external view of a second patch antenna element substrate of another embodiment of the primary radiator of the present invention, in which A is a front view and B is a side view.

FIG. 6 is an external view of a dummy substrate of the primary radiator of the present invention,
A is a front view and B is a side view.

FIG. 7 is an external view of a conventional primary radiator, where A is a front view and B is a front view.
Is a sectional view.

[Explanation of symbols]

 10 Circular polarization / linear polarization converter 11 Horn-shaped primary radiator 12 Circular waveguide 13 First patch antenna element substrate 14 Substrate including preamplifier 15 Substrate housing 16 Screws 17 Recess 18 Pattern 19 Convex portion 20 2nd patch antenna element substrate 21 pattern 22 pattern 23 dummy substrate

Claims (2)

[Claims] 1. A convex portion is provided on both sides of a first patch antenna element substrate for delaying an electric field component phase of a circularly polarized wave of a radio wave from satellite broadcasting or the like by 90 degrees, and a convex side wall surface of a circular waveguide is provided. A recess is provided at a position corresponding to the convex portion so that the first patch antenna element substrate is perpendicular to the circular waveguide, and the recess provided in the circular waveguide is provided with a recess of the first patch antenna element substrate. When the convex portion is inserted and the substrate including the preamplifier is locked in the inner portion of the circular waveguide, the first patch antenna element substrate is pressed against the one surface of the substrate including the preamplifier and is pressed together. Primary radiator characterized by being tightened. 2. A second patch antenna element substrate having a pattern formed on both sides and a dummy substrate having the same shape as the second patch antenna element substrate and having no pattern on both sides are provided.
The convex portion of the second patch antenna element substrate is inserted into the recess provided in the circular waveguide, and the convex portion of the dummy substrate is further inserted, and the substrate including the preamplifier is attached to the circular waveguide. 2. The primary radiator according to claim 1, wherein the second patch antenna element substrate and the dummy substrate are pressed together and fastened together when locked in the inner part.