JPH02244803A - Electronic circuit with plane antenna - Google Patents

Abstract

PURPOSE:To prevent possibility from being suffered from ESD(Electronics Static Damage) by forming an antenna of slot structure by cutting a groove on a ground conductor layer vapor-deposited on one plane of a dielectric substrate, and enclosing the whole of an electronic circuit with the ground conductor layer. CONSTITUTION:The dielectric substrate 1 is provided with the component of the electronic circuit 4 and a circuit pattern on the one plane inside, and is provided with the ground conductor layer 3 on the outside plane. The antenna 2 is the one of slot structure in which the groove (slot) is cut on the ground conductor layer 3 on one plane outside the dielectric substrate 1, and is faced with the outside, and performs the transmission and reception of the signal of the electronic circuit 4 as an electromagnetic wave. Since the whole of the electronic circuit 4 is enclosed with the ground conductor layer 3, no static electricity occurring at the outside is discharged to the antenna 2. In such a way, the possibility to generate the ESD which damages or deteriorates the electronic circuit 4 can be reduced.

Description

[Detailed Description of the Invention] [Summary] Regarding an electronic circuit with a planar antenna that integrates an antenna, an electronic circuit, and a case that houses them, static electricity generated on the outside is discharged to the antenna, thereby discharging the electronics on the printed board. εSD (
Electronics 5tatic Damage
), the antenna is made into a slot-structured antenna by cutting a groove of the required size in the ground conductor layer provided on one side of a planar dielectric substrate, and the other side of the dielectric substrate is The entire electronic circuit provided on the surface and connected to the antenna is surrounded by the ground conductor layer.

[Industrial application field]

The present invention relates to a printed circuit board electronic circuit with a planar antenna, and in particular, [1SD (Blectronics 5ta
This invention relates to an electronic circuit with a planar antenna that prevents tic mouth image.

[Conventional technology]

A conventional electronic circuit with a planar antenna has an antenna conductor plate 2 on the outer surface of an insulating case IOA, as shown in FIG.
A dielectric printed board IA is installed inside the case IOA. Then, a ground conductor pattern 3A is provided on the case side surface of the printed board 1^, a component 41A of the electronic circuit 4A is attached to the opposite inner surface, and a circuit pattern 4.2A is installed.
form. And the electronic circuit 4 inside the printed board IA
A and the two antenna conductor plates on the outside of case 10^,
The printed circuit board IA and the case 10A are connected with a connection pin of 5A, and the antenna, the electronic circuit, and the case that houses them are integrated.

[Problem to be solved by the invention]

As described above, in the conventional electronic circuit with a planar antenna, the antenna conductor plate 2A is directly connected to the electronic circuit 4 inside the dielectric printed board IA, and the printed board IA and the case 1. Because the connection is made through the OA, static electricity generated externally is discharged onto the antenna conductor plate 2A, causing damage to or deterioration of the electronic circuit 4A on the printed board IA.
There is a problem that there is a high possibility of receiving Da II lage). The object of the present invention is to provide an electronic circuit with a planar antenna that prevents this ESC.

[Means to solve the problem]

As shown in the principle diagram in Fig. 1, the problem was to create an antenna with a slot structure by cutting a groove (slot) in a ground conductor layer 3 deposited on one side of a dielectric substrate 1 to form an antenna 2 that faces outward and transmits and receives electromagnetic waves. The present invention is characterized in that the ground conductor layer 3 surrounds the whole parts 41 and the circuit pattern 42 of the electronic circuit 4 of the antenna 2 provided on the other surface of the dielectric substrate 1. Ru.

In the principle diagram of FIG. 1 showing the basic configuration of the electronic circuit with a planar antenna of the present invention, l is a structure in which the components 41 of the electronic circuit 4 and the circuit backing 42 are provided on one inner surface, and the ground conductor layer 3 is provided on the outer surface. This is a dielectric substrate of the electronic circuit 4 provided.

Reference numeral 2 denotes an antenna facing outward and having a slot structure in which a groove (slot) is cut in the ground conductor layer 3 on one side of the outer side of the dielectric substrate 1.

Reference numeral 3 denotes a ground conductor layer provided on one outer surface of the dielectric substrate 1.

4 is an electronic circuit in which components 41 and a circuit pattern 42 are provided on one side of the inside of a dielectric substrate l.

The components 41 of the electronic circuit 4 and the circuit pattern 42 are entirely surrounded by the ground conductor layer 3.

[Effect]

The dielectric substrate 1 has components 41 of the electronic circuit 4 and a circuit pattern 42 on one inner side, and has its ground conductor layer 3 on the outer side.
will be established.

The antenna 2 has a ground conductor N on one side outside the dielectric substrate 1.
3, r! The antenna has a slot structure with 4 (slots) cut out, faces outward, and transmits or receives signals from the electronic circuit 4 as a Ti magnetic field.

Since the entire electronic circuit 4 is surrounded by the ground conductor layer 3, static electricity generated externally will not be discharged to the antenna 2, thereby preventing the ESC from destroying or deteriorating the electronic circuit 4 on the dielectric substrate 1. The probability is reduced and the problem is solved.

〔Example〕

FIG. 2 is a structural diagram showing the configuration of an electronic circuit with a planar antenna according to an embodiment of the present invention, in which the dielectric substrate 1 of A in FIG.
- Made of glass evokin resin copper clad plate, thickness 0.
．． A printed board of 8 to 1.6 m/m is used. Then, on the outer surface of the printed circuit board facing the antenna, a ground conductor N3 is formed on the entire surface by metal vapor deposition, etc., and a groove with a length of approximately λ/2 is cut out in a suitable part of the ground conductor N3 to form a slot structure. Antenna 2 is assumed to be antenna 2. The slot antenna 2 is connected to the line 4 of the electronic circuit pattern 4 on the opposite side by a grounding bottle 32 near the open point (OPEN) at the center of the slot.
It is connected and coupled to the ground point (S)IORT> of No. 2.

Slot antennas are well known, but to briefly explain with reference to the explanatory diagram in FIG. The 2s side is a central open point (OPEN), and the line 42L side is a grounding point (SIORT), and by being coupled to each other, the slot 2s operates as an antenna.

On the inner surface of the printed board of the dielectric substrate 1, electronic components are mounted as an electronic circuit pattern 4, and a microwave circuit is formed using a microstrip line. The printed board of the dielectric substrate 1 used in common for the slot antenna 2 and the electronic circuit pattern 4 is placed in a housing 10 made of plastic with chrome plating as shown in 8 in FIG. 2, for example, and the entire printed board device is grounded. The structure is such that it is covered with a conductive layer.

In the electronic circuit with a planar antenna according to the embodiment of the present invention shown in FIG. 2, the parts 41 and the circuit pattern 42 of the electronic circuit 4 are entirely surrounded by the ground conductor layer 3, so that static electricity generated externally is not applied to the antenna 2. There is no problem because there is no discharge and, therefore, the possibility of ESD causing destruction or deterioration of the electronic circuit 4 of the dielectric substrate 1 is reduced. Furthermore, electronic circuit 4
Electro Magnet
It also serves as a countermeasure against ic interference.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to completely prevent ESD in an electronic circuit with a planar antenna, and at the same time, it is possible to obtain the effect of preventing leakage of electromagnetic waves to the outside.

[Brief explanation of drawings]

Figure 1 is a principle diagram showing the basic configuration of an electronic circuit with a planar antenna according to the present invention, Figure 2 is a structural diagram showing the configuration of an electronic circuit with a flat antenna according to an embodiment of the present invention, and Figure 3 is an implementation of the present invention. An explanatory diagram of a slot antenna for explaining the operation of an example. FIG. 4 is a structural diagram of a conventional electronic circuit with a planar antenna. In the figure, 1 is a dielectric substrate, 2 is an antenna, 3 is a ground conductor layer, 4 is an electronic circuit, and 10 is a housing. Proof 1. Kotanuki Endaifu [;? ] $, shows the composition of the plane 7-te of the moon c7N taken "-poor existence 1" 1 査戻dandandan > q Danmon 14 is convex Pi 1j's upper hand τ is 9 First student down T-4~
"y(nsuko)...toan26l-Nn"g1? A difficult situation

Claims (1)

[Claims] In an electronic circuit including a planar antenna for transmitting and receiving electromagnetic waves, the antenna (2) is provided on one side of a planar dielectric substrate (1) with a ground conductor layer (3) having required dimensions. An electronic circuit with a planar antenna, characterized in that the antenna has a slot structure by cutting a groove in the dielectric substrate, and the electronic circuit (4) provided on the other surface of the dielectric substrate and connected to the antenna is entirely surrounded by the ground conductor layer. .