JPH10284927A - Planar antenna structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts and make a system thinner by forming an insulated body and a conductor pattern to permit them to be one unit in the ground pattern of an antenna element. SOLUTION: The insulated body 25 is printed on the ground pattern 24 and the conductor pattern 26 to be a circuit pattern is formed on it by a paste like silver. Covering is selectively executed on the conductor pattern 26 by a protecting film 27 which is constituted by the insulating body like a resist and resistance to be a circuit constant is constituted by printing resistance consisting of the paste. A pin 28 which is arranged by penetrating a substrate from the antenna pattern 22 side of a rectangular substrate 21 in the direction of the conductor pattern 26 in order to connect the antenna pattern 22 to the conductor patterns 26 is provided. The pin 28 is connected to the conductor pattern 26 and electric parts 29 are fitted to the conductor pattern 26 which is not covered by the protecting film 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a planar antenna structure.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional planar antenna used for a GPS or the like has a rectangular antenna element 11 made of a ceramic and having a ground pattern printed thereon. 11, especially a low noise amplifier (LN
A) and an insulating substrate 12 such as a glass epoxy resin, on which a printed wiring circuit including other components is disposed on one surface, is adhered to the insulating substrate 12 from the side of the antenna element 11 in this state. Pin 14 facing
And the pins 14 are soldered on the insulating substrate 12 so that the antenna element 11 and the insulating substrate 12
It is configured to be connected to the above printed wiring circuit. FIG. 3 is a plan view of the printed wiring circuit including the LNA.

[0003]

However, such a configuration requires the antenna element 11, the insulating substrate 12, the double-sided tape 13, and the pin 14, which are four parts.
This necessitates a process for assembling those components. Also, with such a large number of parts, there is a limit in reducing the overall height when assembled and reducing the thickness.

[0004]

In order to solve such a problem, a planar antenna structure in which an insulator and a conductor pattern are formed in this order on a ground pattern of an antenna element to form one unit. Is provided.

[0005] With this configuration, the number of components can be greatly reduced as compared with the related art, and therefore, the overall height can be reduced, and the planar antenna structure can be made thinner.

[0006]

FIG. 1 shows an embodiment of the structure of a planar antenna used for a GPS or the like according to the present invention. In FIG. 1, a rectangular substrate formed of a dielectric material such as ceramic is shown. An antenna pattern 22 made of metal is printed or formed by a known appropriate method on the lower surface of 21, and its surface is covered with a protective film 23 made of an insulator such as a resist. On the upper surface of the rectangular substrate 21, a ground (ground) pattern 24 made of a metal such as silver (Ag) is printed or formed by a known method. These correspond to the conventional antenna elements described above.

Further, an insulator 25 is printed on the ground pattern 24, and a conductor pattern 26 serving as a circuit pattern is formed thereon by using a paste such as silver (Ag). Then, the conductive pattern 26 is selectively covered with a protective film 27 made of an insulator such as a resist. In this case, the protective film 2 is provided near the parts to be described later.
7 is not covered. And in the above description,
In the conductor pattern 26, the resistance serving as a circuit constant is constituted by a printed resistance made of a paste. Further, in order to connect the antenna pattern 22 to the conductor pattern 26, a pin 28 disposed through the substrate in the direction of the conductor pattern 26 from the antenna pattern 22 side of the rectangular substrate 21.
Having. The pin 28 is connected to the conductor pattern 26 by, for example, soldering. Thereafter, the electric component 29 is attached to the conductor pattern 26 where the protective film 27 is not covered.

With such a configuration, the LN
An insulating substrate such as an epoxy resin and a double-sided tape on which a printed circuit including A is disposed becomes unnecessary, and the number of parts used can be reduced. In particular, the ground pattern and the conductor pattern 26 are printed, and as a result, the overall height of the conventional product of our company was about 9 mm. The structure can be reduced in thickness.

[0009]

As described above, when the planar antenna structure according to the present invention is used, the number of parts can be reduced as compared with the conventional one because the planar antenna structure is unitized, and the overall height can be reduced as compared with the conventional one. Has the effect of Further, since at least the ground pattern and the conductor pattern among the elements constituting the planar antenna structure are formed by printing, the number of components during assembling can be further reduced, and the thickness can be further reduced.

[Brief description of the drawings]

FIG. 1 is a developed view showing an embodiment of a planar antenna structure according to the present invention.

FIG. 2 is a side view showing a basic structure of a conventional planar antenna structure.

FIG. 3 is a plan view illustrating an example of an LNA.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Antenna element 12 Insulating board 13 Double-sided tape 14, 28 pin 21 Rectangular board 22 Antenna pattern 23, 27 Protective film 24 Ground pattern 25 Insulator 26 Conductor pattern 29 Electric parts

Claims (2)

[Claims] An antenna pattern formed on one surface of a substrate; a ground pattern formed on another surface of the substrate;
An insulator disposed on the ground pattern, a conductor pattern formed on the insulator, a protective film disposed on the conductor pattern, and a substrate connecting the antenna pattern to the conductor pattern; A flat antenna structure comprising: 2. The planar antenna structure according to claim 1, wherein said ground pattern and said conductor pattern are patterns formed by printing.