JPH0567914A - Polarizer - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a polariser with high electrical performance while preventing the space between conductive patterns and dimensional deformation of the polariser, preventing scorching and ignition of the substrate. [Structure] A plate material 2 made of fiber reinforced plastic is attached to a substrate 3 of a different pattern using a conductive pattern 1 and a low dielectric constant (for example, ε = 2. 2) Substrate arranging means 1 including a spacer 4 and a fastener 5 made of a polymer material having a low dielectric loss tangent (for example, tan δ = 0.002).
2 was provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizer for polarizing a high-power electromagnetic wave used in a communication device, for example.

[0002]

2. Description of the Related Art FIG. 2 is a sectional view of a conventional high-power electromagnetic wave polarizer for communication equipment. In the figure, 1 is a conductive pattern that partially reflects electromagnetic waves, 2 is a plate material of fiber reinforced plastic,
Reference numeral 7 is a substrate in which the conductive pattern 1 is provided on the surface of the plate material 2. Reference numeral 8 is a core material made of a honeycomb or flex core made of a thin film of a polymer material, 9 is an adhesive, and 10 is a conventional communication obtained by adhering the substrate 7 and the core material 8 using the adhesive 9 and curing them. It is a high-power electromagnetic wave polarization machine for machines.

Next, the operation will be described. Conventional high-power electromagnetic wave polarizers for communication equipment use the property that when electromagnetic waves hit other media, they are partially reflected on the surface and partially penetrated into the medium. When the electromagnetic wave radiated to [2] passes through the conventional polarizer 10 of FIG. 2, it is polarized by repeating partial reflection and passage by the conductive pattern 1. In such a polarizer, the conductive pattern 1 is highly heated by dielectric heating due to a part of electromagnetic waves that pass through the conductive pattern 1.

[0004]

Since the conventional polarizer is constructed as described above, the conductive pattern is heated by dielectric heating, the air in the core material is heated, and the core material expands. Problems such as the spacing between conductive patterns no longer satisfying the prescribed size, the electrical performance deteriorates due to the deformation of the polariser, and the substrate burns and ignites due to the high heating of the conductive patterns due to dielectric heating. was there.

The present invention has been made in order to solve the above problems, and prevents the distance between the conductive patterns and the dimensional deformation of the polariser, prevents the substrate from being scorched and ignited, and the electric The purpose is to obtain a high-performance polariser.

[0006]

A polariser according to the present invention eliminates a core material and an adhesive, allows air to circulate, and is a spacer made of a polymer material having a low dielectric constant and a low dielectric loss tangent. The fastener maintains the space between the conductive patterns at a predetermined size.

[0007]

The polarizer according to the present invention eliminates the core material and the adhesive to reduce the electrical loss caused by the electromagnetic waves passing through the polarizer, and the heat generated by the conductive pattern and the spacer is circulated through the air. To allow cooling. Further, by using a spacer or a fastener made of a polymer material having a property of low dielectric constant and low dielectric loss tangent, heat generation of the spacer or the fastener is reduced.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a high power electromagnetic wave polarizer for a communication device according to an embodiment. In the figure, 1 is a conductive pattern that partially reflects electromagnetic waves, 2 is a plate material of fiber reinforced plastic, 3 is a board provided with a conductive pattern 1 on the surface of the plate material 2, and a hole 11 for attaching a fastener 5 is opened. is there. 4 is a low dielectric constant such as ε = 2.2 and a low dielectric loss tangent such as tan δ
A spacer made of a polymer material having a characteristic of 0.002, 5 is a fastener made of the same material as the spacer 4, 12 is a substrate arranging means including the spacer 4 and the fastener, and 6 is a substrate 3
And a spacer 4 is assembled by using a fastener 5, which is a high-power electromagnetic wave polarizer for a communication device.

A high-power electromagnetic wave polarizer for a communication device utilizes the property that when an electromagnetic wave hits another medium, it is partly reflected on the surface and partly penetrated into the medium. When the radiated electromagnetic wave passes through the polarizer 6 of FIG. 1, it is polarized by repeating partial reflection and passage by the conductive pattern 1. In addition, the conductive pattern 1 is highly heated by the dielectric heating by a part of the electromagnetic waves transmitted through the conductive pattern 1.

In this embodiment, since the core material 8 made of a thin film of a polymer material such as a honeycomb or a flex core shown in FIG. 2 is eliminated, the portion A shown in FIG. 1 becomes hollow and air can be circulated. The air flow may be natural air flow due to a temperature difference, natural wind, or the like, but forced cooling may be performed using a fan, a blower, or the like. In this way, by heating and expanding the air by increasing the heat of the conductive pattern 1 and by radiating heat by circulating or cooling the air, the distance between the conductive patterns 1 and the dimensional deformation of the polarizer and the scorching of the substrate 3 are caused. , Can prevent ignition.

Further, the conductive pattern 1 is formed by the spacer 4 and the fastener 5 made of a polymer material having the characteristics of low inductive conductivity ε = 2.2 and low dielectric loss tangent tan δ = 0.002 in FIG.
By maintaining the distance between them, heat generation from the spacer and the fastener is reduced.

Further, a core material 8 made of a honeycomb or a flex core made of a thin film of a polymer material in FIG.
By eliminating the adhesive 9, it is possible to reduce the electrical loss caused by the electromagnetic wave passing through the polarizer 6.

As described above, in this embodiment, a substrate having a different pattern in which a conductive pattern is used on a plate material of fiber reinforced plastic and a low dielectric constant attached to a position satisfying a predetermined space between the conductive patterns. , A high-power electromagnetic wave polarizer for a communication device has been described, which is composed of a spacer made of a polymer material having a characteristic of low dielectric loss tangent and a fastener.

Example 2. In the above embodiment, the case where both the spacer 4 and the fastener 5 are made of a predetermined polymer material is shown, but at least one of the spacer and the fastener may be used.

Example 3. In the above embodiment, ε = 2.2,
The case of tan δ = 0.002 is shown, but FIG.
The combination of the dielectric constant and the dielectric loss tangent may be such that the heat generation is smaller than that generated by the configuration shown in FIG.

[0016]

As described above, according to the present invention, since the core material and the adhesive are removed from the polarizer, and the spacers and the fasteners are provided, the distance between the conductive patterns and the size of the polarizer are determined. It is possible to prevent deformation and scorching and ignition of the substrate, and it is also possible to obtain a high electrical performance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a polariser that polarizes high-power electromagnetic waves used in a communication device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a polarizer used to polarize a high-power electromagnetic wave used in a conventional communication device.

[Explanation of symbols]

 1 Conductive Pattern 2 Plate Material 3 Substrate 4 Spacer 5 Fastener 6 Polarizer 11 Hole 12 Substrate Arrangement Means

Claims (1)

[Claims] 1. A polarizer having the following elements: (a) a plurality of substrates having a predetermined pattern, (b) a spacer between a part of the plurality of substrates and arranging the substrates at predetermined intervals, These substrates and a fastener for arranging and tightening the spacer at a predetermined position are provided, and at least one of the spacer and the fastener is made of a polymer material having a predetermined dielectric constant and a predetermined dielectric loss tangent. Board placement means.