JP3660758B2 - Printed board - Google Patents
Printed board Download PDFInfo
- Publication number
- JP3660758B2 JP3660758B2 JP22823796A JP22823796A JP3660758B2 JP 3660758 B2 JP3660758 B2 JP 3660758B2 JP 22823796 A JP22823796 A JP 22823796A JP 22823796 A JP22823796 A JP 22823796A JP 3660758 B2 JP3660758 B2 JP 3660758B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna mounting
- mounting portion
- transmission line
- circuit board
- measurement terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
Landscapes
- Parts Printed On Printed Circuit Boards (AREA)
- Structure Of Printed Boards (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は無線機に内蔵するプリント基板に関し、特にアンテナ取り付け部と無線回路との間に無線回路の測定用端子を具備するが、アンテナと測定用端子の切替えスイッチを具備せずに無線回路のインピーダンス整合をとろうとするものである。
【０００２】
【従来の技術】
従来、無線回路のプリント基板は、アンテナ取り付け部と無線回路との間に無線回路の測定用端子が設けられ、製造時にこの測定用端子に測定機器のコネクタを接続して試験がされる。そして、インピーダンス整合のためアンテナ取り付け部と測定用端子とを切り替えて無線回路に接続する切替えスイッチが具備されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、前述の切替えスイッチを具備することはコスト高になる。
【０００４】
【課題を解決するための手段】
上記従来技術の課題を解決するため本発明のプリント基板は、無線回路とアンテナ取り付け部とを接続する伝送ライン上に測定用端子が並列に接続されたプリント基板において、前記測定用端子とアンテナ取り付け部との間に、誘導性ブロックを伝送ラインに直列に、また容量性ブロックを伝送ラインに並列にこの順番にパターン及びスルーホールにて直接形成した。
【０００５】
【発明の実施の形態】
図１は本発明の一実施形態を示す等価回路図で、矢印Ａはアンテナ測定端子側、矢印Ｂは無線回路側を示す。アンテナ取り付け部ａと無線回路とを接続する伝送ラインには測定用端子１が並列に具備されている。そして、整合用のスタブとして、誘導性ブロックｂがラインに直列に、容量性ブロックｃがラインに並列に具備されている。アンテナ取り付け部ａはプリント基板のスルーホールをアンテナ取り付け用孔として用いるものである。また、誘導性ブロックｂ、容量性ブロックｃはプリント基板（ガラスエポキシ材）のパターン及びスルーホールで構成するものである。
【０００６】
測定用端子１に測定機器のコネクタ端子を接続して無線回路側Ｂの整合（例えば５０Ω）がとれた状態である時に、測定用端子１からコネクタ端子を外しアンテナ取り付け部ａから見ると無線回路側Ｂの整合は同様になる。これにより測定用端子１にコネクタ接続した状態と、アンテナ取り付け部ａにアンテナを取り付けた状態の両者において無線回路側Ｂの整合が同様になり、無線回路側Ｂの動作（特性）は変化しない。
【０００７】
ただし、アンテナ取り付け部ａにアンテナを取り付け、同時に測定用端子１にコネクタを接続した場合には、この整合は成り立たなくなる。
【０００８】
以上のように、スタブ用の誘導成分と容量成分をプリント基板自体で直接形成するようにしたので、コストメリットが高く、またバラツキ公差が少ない。
【０００９】
また、アンテナ取り付け部として、プリント基板のスルーホールを用いることによりコストメリットがさらに高まる。
【００１０】
【発明の効果】
以上のように本発明は、従来必要とされた切替えスイッチを不要にして、しかもスタブ用の誘導成分と容量成分をプリント基板のパターン及びスルーホールで直接形成するようにしたのでコストメリットが高まり、かつバラツキ公差が少なくなる。
【図面の簡単な説明】
【図１】本発明の一実施形態を示す等価回路図。
【符号の説明】
Ａ：測定用端子側
Ｂ：無線回路側
ａ：アンテナ取り付け部
ｂ：誘導性ブロック（誘導成分）
ｃ：容量性ブロック（容量成分）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed circuit board built in a wireless device, and in particular, includes a measurement terminal for a wireless circuit between an antenna mounting portion and a wireless circuit, but does not include a switch for switching between the antenna and the measurement terminal. It is intended to achieve impedance matching.
[0002]
[Prior art]
Conventionally, a printed circuit board of a wireless circuit is provided with a measurement terminal for the wireless circuit between the antenna mounting portion and the wireless circuit, and is tested by connecting a connector of a measurement device to the measurement terminal at the time of manufacture. A changeover switch for switching the antenna mounting portion and the measurement terminal to connect to the radio circuit is provided for impedance matching.
[0003]
[Problems to be solved by the invention]
However, providing the above-described changeover switch increases the cost.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems of the prior art, the printed circuit board of the present invention is a printed circuit board in which measurement terminals are connected in parallel on a transmission line that connects a radio circuit and an antenna mounting part. The inductive block was formed in series with the transmission line, and the capacitive block was directly formed with the pattern and the through hole in this order in parallel with the transmission line.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an equivalent circuit diagram showing an embodiment of the present invention, wherein an arrow A indicates an antenna measurement terminal side and an arrow B indicates a radio circuit side. A measurement line 1 is provided in parallel on a transmission line connecting the antenna mounting portion a and the radio circuit. As a matching stub, an inductive block b is provided in series with the line, and a capacitive block c is provided in parallel with the line. The antenna mounting portion a uses a through hole of the printed board as an antenna mounting hole. The inductive block b and the capacitive block c are configured by a printed board (glass epoxy material) pattern and a through hole.
[0006]
When the connector terminal of the measuring device is connected to the measuring terminal 1 and the wireless circuit side B is matched (for example, 50Ω), the wireless terminal is removed from the measuring terminal 1 and viewed from the antenna mounting portion a. Side B alignment is similar. As a result, the matching on the radio circuit side B is the same in both the state where the connector is connected to the measurement terminal 1 and the state where the antenna is attached to the antenna mounting portion a, and the operation (characteristics) on the radio circuit side B does not change.
[0007]
However, when an antenna is attached to the antenna attachment portion a and a connector is connected to the measurement terminal 1 at the same time, this matching does not hold.
[0008]
As described above, since the inductive component and the capacitive component for the stub are directly formed by the printed circuit board itself, the cost merit is high and the variation tolerance is small.
[0009]
Further, the cost merit is further increased by using the through hole of the printed circuit board as the antenna mounting portion.
[0010]
【The invention's effect】
As described above, the present invention eliminates the conventionally required changeover switch and further directly forms the inductive component and the capacitive component for the stub with the pattern and the through hole of the printed circuit board, thereby increasing the cost merit. And the variation tolerance is reduced.
[Brief description of the drawings]
FIG. 1 is an equivalent circuit diagram showing an embodiment of the present invention.
[Explanation of symbols]
A: Measurement terminal side B: Radio circuit side a: Antenna mounting part b: Inductive block (inductive component)
c: Capacitive block (capacitive component)
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22823796A JP3660758B2 (en) | 1996-08-29 | 1996-08-29 | Printed board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22823796A JP3660758B2 (en) | 1996-08-29 | 1996-08-29 | Printed board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1075023A JPH1075023A (en) | 1998-03-17 |
| JP3660758B2 true JP3660758B2 (en) | 2005-06-15 |
Family
ID=16873316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22823796A Expired - Fee Related JP3660758B2 (en) | 1996-08-29 | 1996-08-29 | Printed board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3660758B2 (en) |
-
1996
- 1996-08-29 JP JP22823796A patent/JP3660758B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1075023A (en) | 1998-03-17 |
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