JP2002151911A - High frequency device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency device applied to mobile communication and personal computer communication, which prevents its reception sensitivity from being deteriorated. SOLUTION: A mounting metallic fixture 20 that is formed not to cover an antenna terminal 12 and a transmission terminal 13 of an antenna multicoupler 1 is connected to the ground terminal of the antenna multicoupler 1, a reception terminal 11 of the antenna multicoupler 1 is covered via the mounting metallic fixture 20 and an air gap 40, the integrated component is inserted to a through-hole 2 of a double-sided printed circuit board 10 and the mounting metallic fixture 20 is fixed to the double-sided printed circuit board 10 in its inserting direction. Thus, the reception sensitivity of the high frequency device can be prevented from deteriorating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency device used for mobile communication and personal computer communication.

[0002]

2. Description of the Related Art A conventional high-frequency device will be described below.

A conventional high-frequency device has a configuration as shown in a perspective view of FIG. In FIG. 8, the antenna terminal 12 of the antenna duplexer 1, the transmission terminal 13 of the antenna duplexer 1, and the reception terminal 11 of the antenna duplexer 1 are not covered with the mounting bracket 20, and the antenna duplexer 1
It was inserted and arranged in the through hole 2 of the double-sided board 10, and was fixed to the double-sided board 10 with the flange 21 by the mounting bracket 20. The reason why the antenna terminal 12 of the antenna duplexer 1, the transmission terminal 13 of the antenna duplexer 1, and the reception terminal 11 of the antenna duplexer 1 are not covered with the mounting bracket 20 is that these terminals come into contact with the mounting bracket 20. This is because the function of the antenna duplexer 1 stops.

[0004]

However, in the conventional configuration, the reception terminal 11 of the antenna duplexer 1 is electromagnetically coupled to the metal housing of the high-frequency device, and the reception-side passage loss of the antenna duplexer 1 increases. However, there is a problem that the receiving sensitivity of the high-frequency device is deteriorated. In addition, antenna duplexer 1
The antenna terminal 12 of the antenna duplexer 1 and the transmission terminal 13 of the antenna duplexer 1 also cause the same phenomenon.
Has a small area, so that there is almost no electromagnetic field coupling between it and the housing of the high-frequency device. However, reducing the size of the receiving terminal 11 of the duplexer 1 leads to deterioration of the characteristics of the duplexer 1.
1 cannot be made as small as the antenna terminal 12 of the antenna duplexer 1 and the transmission terminal 13 of the antenna duplexer 1. In addition, it is conceivable to insert an insulating film between the receiving terminal 11 of the antenna duplexer 1 and the mounting bracket 20, but in this case, it is conceivable that the insulating film may peel off.

[0005] The present invention has been made to solve such a problem, and has as its object to prevent the reception sensitivity of a high-frequency device from deteriorating.

[0006]

In order to achieve this object, a high-frequency device according to the present invention comprises a mounting bracket formed so as not to cover an antenna terminal and a transmission terminal of an antenna duplexer, and connected to a ground terminal of the antenna duplexer. Then, the receiving terminal of the antenna duplexer is covered via the mounting bracket and the gap, and this integrated component is inserted and arranged in a penetrating portion of the double-sided board, and the mounting bracket is fixed from the insertion direction of the double-sided board. is there.

As a result, it is possible to prevent the reception sensitivity of the high-frequency equipment from deteriorating.

[0008]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a mounting bracket formed so as not to cover an antenna terminal and a transmission terminal of an antenna duplexer is connected to a ground terminal of the antenna duplexer. The receiving terminal of the duplexer is covered via the mounting bracket and the gap, and the integrated component is inserted and arranged in a penetrating portion of the double-sided board, and the mounting bracket is fixed from the insertion direction of the double-sided board,
Since there is a gap between the receiving terminal of the duplexer and the housing of the high-frequency device, the receiving terminal of the duplexer and the housing of the high-frequency device cannot be electromagnetically coupled. It is possible to prevent the passage loss from increasing.

In the invention according to claim 2, the antenna terminal and the transmission terminal of the antenna duplexer are connected to a double-sided board via a mounting bracket, and the reception terminal of the antenna duplexer is directly connected to the double-sided board. A high-frequency device according to claim 1, wherein the connection between the antenna terminal and the transmission terminal of the duplexer and the double-sided board can be prevented from being broken by vibration.

The invention according to claim 3 is the high-frequency device according to claim 1, wherein the double-sided board and the antenna terminal, the transmission terminal, and the reception terminal of the antenna duplexer are connected on one surface of the double-sided board. The influence from the other side of the housing covering the double-sided board can be eliminated.

The dimensions of the void according to the invention described in claim 4 are as follows:
2. The high-frequency device according to claim 1, wherein the width is 0.15 mm or more and 0.2 mm or less. Voltage standing wave ratio) can be improved.

According to a fifth aspect of the present invention, there is provided the high-frequency device according to the first aspect, wherein the ground terminal adjacent to the receiving terminal of the antenna duplexer is grounded on both the front and back surfaces of the double-sided board. Since the grounding is strengthened, the receiving characteristics can be improved.

According to a sixth aspect of the present invention, there is provided the high-frequency device according to the first aspect, wherein the ground terminal of the duplexer and the outer casing of the high-frequency device are electrically connected, and the grounding of the duplexer is enhanced. Therefore, the reception characteristics can be improved.

According to a seventh aspect of the present invention, a part of the double-sided substrate is covered with a shield case, and the ground terminal of the antenna duplexer and the outer casing are connected via the shield case. Since it is a high-frequency device and has a shield case interposed, it does not require a member for grounding.

According to the invention described in claim 8, the mounting bracket near the antenna terminal and the transmission terminal of the antenna duplexer includes:
The high-frequency device according to claim 1, wherein a convex portion protruding toward the exterior housing of the high-frequency device is provided, and even if an external force is applied to the antenna terminal and the transmission terminal of the antenna duplexer, There is no contact.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a main part of a high-frequency device according to an embodiment of the present invention, and FIG. 2 is a top view thereof.
As shown in FIG. 1, a through hole 2 is formed in the double-sided substrate 10. The antenna duplexer 1 has an upper installation surface connected by a mounting bracket 20. After the antenna duplexer 1 is inserted into the through hole 2 of the double-sided board 10, the double-sided board 1 is
Fixed to 0.

FIG. 3 shows an antenna duplexer 1 to which a mounting bracket 2 is attached.
FIG. 4 is a cross-sectional view showing a state where the display panel is fixed to the double-sided substrate at 0.
In the present embodiment, the antenna duplexer 1 uses an integrated dielectric duplexer. In this state, the antenna terminal 12 and the transmission terminal 13 of the antenna sharing device 1 are configured not to be covered by the mounting bracket 20, and the receiving terminal 11 of the antenna sharing device 1 is not in contact with the mounting bracket 20, and is not connected to the mounting bracket 20. 0.15mm or more between 0.2
A gap 40 of not more than mm is provided. As described above, the receiving terminal 11 of the antenna sharing device 1 is separated from the mounting bracket 20 by a certain distance so as not to be in contact with the mounting metal 20, and a part of the mounting bracket 20 covering the upper part of the receiving terminal 11 of the antenna sharing device 1 is inflated. I have.

With this configuration, even if the double-sided board 10 to which the antenna duplexer 1 is attached is used in an environment surrounded by a metal casing, the reception terminal 11 of the antenna duplexer 1 can be used. As a result, it is possible to prevent an increase in the reception passing loss of the antenna duplexer 1 and to prevent deterioration of the reception sensitivity of the high-frequency device.

FIG. 4 shows the mounting bracket 2 with the antenna duplexer 1 attached.
It is a side view connected to 0. As shown in FIG. 4, an air gap 40 is provided between the receiving terminal 11 of the duplexer 1 and the mounting bracket 20. The gap 40 is provided to prevent the receiving terminal 11 of the antenna sharing device 1 from being in contact with the mounting bracket 20, and has a function of forming a capacitance between the receiving terminal 11 of the antenna sharing device 1 and the mounting bracket 20. I also have.

At this time, if the size of the gap 40 is too short, the capacity between the receiving terminal 11 of the antenna duplexer 1 and the mounting bracket 20 becomes too large, and the reception passing characteristic of the antenna duplexer 1 is deteriorated. Conversely, if the size of the gap 40 is too long, the capacity between the receiving terminal 11 of the antenna sharing device 1 and the mounting bracket 20 becomes too small, and the antenna sharing device 1
, The reception pass characteristic is deteriorated.

In this embodiment, in order to secure the required capacity formed between the receiving terminal 11 of the antenna sharing device 1 and the mounting bracket 20, a gap between the receiving terminal 11 of the antenna sharing device 1 and the mounting bracket 20 is secured. The size of No. 40 was 0.15 mm or more and 0.2 mm or less. As a result, antenna duplexer 1
The VSWR characteristic of the receiving terminal impedance can be improved, and the receiving pass characteristic is improved.

FIG. 5 is a perspective view of a high-frequency device. As shown in FIG. 5, in the present embodiment, the mounting bracket 3
1, 32 were used. Antenna terminal 1 of antenna duplexer 1
2 and the transmission terminal 13 are arranged on the same side.
When the antenna terminal 12 and the transmission terminal 13 of the duplexer 1 are directly connected to the double-sided board 10, if the connection area of the antenna terminal 12 and the transmission terminal 13 of the duplexer 1 is small, the antenna terminal of the duplexer 1 is vibrated due to vibration. 12 and the transmission terminal 13 may be separated.

To prevent this, the antenna terminal 12 and the transmission terminal 13 of the antenna duplexer 1 are attached to the mounting bracket 3.
By connecting to the double-sided board 10 via 1 and 32,
The mounting brackets 31 and 32 function as vibration absorbing components, and as a result, it is possible to prevent the antenna terminal 12 and the transmission terminal 13 of the antenna duplexer 1 from peeling off.

The receiving terminal 11 of the duplexer 1 and the double-sided board 10 are directly connected by the solder 33.
This is possible because the area of the receiving terminal 11 of the duplexer 1 is larger than the area of the antenna terminal 12 and the transmitting terminal 13 of the duplexer 1. Of course, the receiving terminal 11 of the antenna duplexer 1 and the double-sided board 10
May be connected. The double-sided board 10 and the receiving terminal 11, the antenna terminal 12, and the transmitting terminal 13 of the duplexer 1 are connected on one side of the double-sided board 10. This makes it possible to reduce the influence of the high-frequency device housing from the other surface of the double-sided substrate 10.
The ground terminal adjacent to the receiving terminal 11 is
Are grounded on both the front and back surfaces, and the grounding is strengthened to improve the reception characteristics.

FIG. 6 shows the mounting bracket 2 with the antenna duplexer 1 attached.
It is the front view connected to 0. As shown in FIG. 6, in the present embodiment, the antenna terminal 1 of the antenna duplexer 1
In the vicinity of the mounting bracket 20 of the transmission terminal 13 and the transmission terminal 13, a convex portion 41 protruding toward the outer casing of the high-frequency device was provided. Thus, even if an external force is applied to the antenna terminal 12 and the transmission terminal 13 of the antenna duplexer 1, the antenna terminal 12 and the transmission terminal 13 do not come into contact with the exterior housing.

FIG. 7 is a sectional view of a high-frequency device. As shown in FIG. 7, in the present embodiment, a part of the double-sided substrate 10 including the portion where the antenna duplexer 1 is mounted is covered with a metallic shield case 42, and the antenna duplexer is One ground terminal 44 and the outer casing 43 are electrically connected by claws 45. As a result, the grounding of the duplexer 1 is strengthened, so that the receiving characteristics are improved. Further, since the grounding is performed via the shield case 42, a member for grounding is not required.

[0028]

As described above, according to the present invention, the mounting bracket formed so as not to cover the antenna terminal and the transmission terminal of the antenna duplexer is connected to the ground terminal of the antenna duplexer, and the reception of the antenna duplexer is performed. The terminal is covered with the mounting bracket through a gap, and the integrated component is inserted and arranged in a penetrating portion of the double-sided board, and the mounting bracket is fixed from the insertion direction of the double-sided board. There is an air gap between the antenna and the housing of the high-frequency device, so that the receiving terminal of the antenna duplexer and the housing of the high-frequency device cannot be electromagnetically coupled, preventing an increase in the reception passing loss of the antenna duplexer. It becomes possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a high-frequency device according to an embodiment of the present invention.

FIG. 2 is a top view of the antenna duplexer unit constituting the high-frequency device.

FIG. 3 is a sectional view of the antenna duplexer unit and its vicinity;

FIG. 4 is a side view of the antenna duplexer unit.

FIG. 5 is a perspective view of the antenna duplexer unit and its vicinity.

FIG. 6 is a front view of the antenna duplexer unit.

FIG. 7 is a sectional view of the high-frequency device.

FIG. 8 is an exploded perspective view of a main part of a conventional high-frequency device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 antenna shared device 2 through hole 10 double-sided board 11 reception terminal 12 antenna terminal 13 transmission terminal 20 mounting bracket 40 gap

Continuing from the front page (72) Inventor Yukio Sakai 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Terms (reference) 5E321 AA02 AA14 BB53 GG05 5J006 JA22 KA01 LA03 LA09 LA13 PA02 PA03 5K011 AA06 JA01 KA04

Claims (8)

[Claims] 1. A mounting bracket formed so as not to cover an antenna terminal and a transmitting terminal of an antenna duplexer is connected to a ground terminal of the antenna duplexer, and a receiving terminal of the antenna duplexer is connected to the mounting bracket via a gap. Cover and
A high-frequency device in which the integrated component is inserted and arranged in a penetrating portion of the double-sided board, and the mounting bracket is fixed in the insertion direction of the double-sided board. 2. The high-frequency device according to claim 1, wherein the antenna terminal and the transmission terminal of the antenna duplexer are connected to a double-sided board via a mounting bracket, and the reception terminal of the antenna duplexer is directly connected to the double-sided board. . 3. The high-frequency device according to claim 1, wherein the double-sided board and the antenna terminal, the transmission terminal, and the reception terminal of the antenna duplexer are connected on one surface of the double-sided board. 4. The size of the gap is 0.15 mm or more and 0.2
2. The high-frequency device according to claim 1, wherein the distance is equal to or less than mm. 5. The high-frequency device according to claim 1, wherein the ground terminal adjacent to the receiving terminal of the antenna duplexer is grounded on both the front and back surfaces of the double-sided board. 6. The high-frequency device according to claim 1, wherein a ground terminal of the duplexer and an outer casing of the high-frequency device are electrically connected. 7. The high-frequency device according to claim 6, wherein a part of the double-sided board is covered with a shield case, and the ground terminal of the duplexer and the outer casing are connected via the shield case. 8. The high-frequency device according to claim 1, wherein a protrusion protruding toward an outer casing of the high-frequency device is provided on a mounting bracket near the antenna terminal and the transmission terminal of the antenna duplexer.