JPH0252493A - Abnormal resonance preventing printed circuit board - Google Patents
Abnormal resonance preventing printed circuit boardInfo
- Publication number
- JPH0252493A JPH0252493A JP20407888A JP20407888A JPH0252493A JP H0252493 A JPH0252493 A JP H0252493A JP 20407888 A JP20407888 A JP 20407888A JP 20407888 A JP20407888 A JP 20407888A JP H0252493 A JPH0252493 A JP H0252493A
- Authority
- JP
- Japan
- Prior art keywords
- circuit board
- printed circuit
- screw holes
- vco
- resonance
- 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.)
- Granted
Links
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 13
- 230000002265 prevention Effects 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 abstract description 9
- 238000005452 bending Methods 0.000 abstract 1
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 235000006732 Torreya nucifera Nutrition 0.000 description 1
- 244000111306 Torreya nucifera Species 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- H05K1/0213—Electrical arrangements not otherwise provided for
-
- 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
- H05K1/18—Printed circuits structurally associated with non-printed electric components
Landscapes
- Waveguides (AREA)
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
- Structure Of Printed Boards (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は異常共振を防止したプリント基板に関し、特に
マイクロ波帯局部発振器用プリント基板などで異常共振
による発振レベルの減衰を防止したプリント基板に関す
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a printed circuit board that prevents abnormal resonance, and particularly to a printed circuit board that prevents attenuation of oscillation level due to abnormal resonance in a printed circuit board for a microwave band local oscillator, etc. .
従来から用いられている局部発振器用プリント基板にお
いては、電圧制御発振器（ＶＣＯ）及びこれに載せたサ
ブキャリアを搭載するために、ビスにより固定していた
。Conventionally used printed circuit boards for local oscillators have been fixed with screws in order to mount a voltage controlled oscillator (VCO) and a subcarrier mounted thereon.
第３図は従来のプリント基板の一例の部分断面図である
。このプリント基板１３にはサブキャリアをビスにより
取付けるビス穴１〜７、配線穴をもつストリップライン
８，９、電源端子穴をもつストリップライン１０．１１
が設けられている。FIG. 3 is a partial cross-sectional view of an example of a conventional printed circuit board. This printed circuit board 13 includes screw holes 1 to 7 for attaching the subcarrier with screws, strip lines 8 and 9 with wiring holes, and strip lines 10 and 11 with power terminal holes.
is provided.
このプリント基板を用いた実装例が第４図に示される。An example of mounting using this printed circuit board is shown in FIG.
このプリント基板１３に、ＶＣＯ１４を搭載したサブキ
ャリア１５をビス１６〜２２で固定した場合、サブキャ
リア１５はビス１６〜２２の部分でプリント板１３と確
実に接触しているが、あるビス１７．２０の間ではしな
りを生じて接触していない場合があり、間隙２３を生ず
る。When the subcarrier 15 on which the VCO 14 is mounted is fixed to this printed circuit board 13 with screws 16 to 22, the subcarrier 15 is securely in contact with the printed circuit board 13 at the screws 16 to 22, but some screws 17. 20 may bend and not be in contact, creating a gap 23.
この様な場合、プリント板１３の部品面では、ビスの部
分がショートとなる共振器の様に振る舞い、ビス間隔Ａ
がＶＣ○１４発振周波数の波長のλｇの整数倍の１／２
のときＶＣＯ１４の発振しベルを減衰させる。ただし、
波長λｇはＶＣＯの発振周波数でのプリント板による波
長短縮を考慮に入れた波長である。In such a case, on the component surface of the printed board 13, the screw portion behaves like a resonator with a short circuit, and the screw spacing A
is 1/2 of an integral multiple of λg of the wavelength of the VC○14 oscillation frequency
When this happens, the VCO 14 oscillates and the bell is attenuated. however,
The wavelength λg is a wavelength that takes into consideration wavelength shortening due to the printed board at the oscillation frequency of the VCO.
上述した従来のプリント基板１３は、ＶＣＯ及びサブキ
ャリア１５をビス１６〜２２により固定しているが、ビ
ス間隔Ｂが所定周波数で共振するなめ、発振レベルが減
衰する場合があり、この場合にはプリント基板１３のビ
ス穴位置を再設計しなければならない欠点がある。In the conventional printed circuit board 13 described above, the VCO and the subcarrier 15 are fixed by screws 16 to 22, but since the screw interval B resonates at a predetermined frequency, the oscillation level may be attenuated. There is a drawback that the screw hole positions of the printed circuit board 13 must be redesigned.
また、プリント基板のパターンの制約からビス穴間寸法
Ｂできまる共振周波数を使用周波数から遠ざける設計が
出来にくい場合があった。Furthermore, due to the restrictions of the pattern of the printed circuit board, it may be difficult to design the resonant frequency determined by the distance B between the screw holes away from the operating frequency.
本発明の目的は、このような問題を解決し、異常共振に
よる発振レベルの減少を防止した異常共振防止プリント
基板を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an abnormal resonance prevention printed circuit board that solves such problems and prevents a reduction in oscillation level due to abnormal resonance.
本発明の構成は、ＭＩＣ化した電圧制御発振器が搭載さ
れたサブキャリアをビスで固定して形成した異常共振防
止プリント基板において、前記サブキャリアをプリント
基板に固定するよう配置した特定のビス穴の間に所定長
さのスリット穴を配設することにより、前記ビス穴間隔
による共振を防止したことを特徴とする。The structure of the present invention is that in an abnormal resonance prevention printed circuit board formed by fixing a subcarrier on which a MIC voltage controlled oscillator is mounted with screws, specific screw holes arranged to fix the subcarrier to the printed circuit board are formed. It is characterized in that resonance due to the spacing between the screw holes is prevented by providing a slit hole of a predetermined length between them.
次に、本発明を図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の異常共振防止プリント基板の一実施例
の部分平面図である。ＶＣＯ出力部及びこれからのびる
ストリップラインをはさんでビス穴１〜７があるが、さ
らにビス穴間にスリット穴１２を設けたことを特徴とす
る。FIG. 1 is a partial plan view of an embodiment of the abnormal resonance prevention printed circuit board of the present invention. There are screw holes 1 to 7 across the VCO output section and the strip line extending therefrom, and it is further characterized in that slit holes 12 are provided between the screw holes.
第２図は本実施例の実装使用時の平面図で、プリント板
１３に、ＶＣＯ１４及びサブキャリア１５をビス１６〜
２２で固定した状態を示している。この場合、第４図の
様に、あるビス間隔Ｂでしなりを生じて接触していない
場合があり、プリント板の部品面でビスの部分がショー
トとなる共振器の様に振る舞い、Ｖｃｏの発振レベルを
減衰させることがあるが、第１図の様にスリット穴１２
を設けることにより、共振周波数を変化させ、発振レベ
ルの減衰を防止することができる。FIG. 2 is a plan view of this embodiment when it is mounted and in use.
22 shows a fixed state. In this case, as shown in Figure 4, the screws may bend at a certain distance B and may not be in contact, causing the screws to act like a resonator and short circuit on the component surface of the printed board, causing the Vco The oscillation level may be attenuated, but as shown in Figure 1, the slit hole 12
By providing this, it is possible to change the resonance frequency and prevent attenuation of the oscillation level.
以上説明したように本発明は、ＶＣＯを搭載したプリン
ト基板のＶＣＯ出力部付近のビス穴の間にスリット穴を
設けることにより、ビス穴間の異常共振を防止し、正常
な出力レベルを得ることができるという効果がある。As explained above, the present invention prevents abnormal resonance between the screw holes and obtains a normal output level by providing slit holes between the screw holes near the VCO output section of a printed circuit board on which a VCO is mounted. It has the effect of being able to.
茅 ／Ｉ！ＩKaya /I! I
第１図は本発明の異常共振防止プリント基板の一実施例
の部分平面図、第２図は本実施例の実装時の平面図、第
３図は従来のプリント基板の一例の部分平面図、第４図
は第３図（第２図）のＡ−Ａ’断面図である。
１〜７・・・ビス穴、８，９・・・ＶＣ○出力端子穴及
びストリップライン、１０．１１・・・ｖＣＯ電源端子
穴及び電源ライン、１２・・・スリット穴、１３・・・
プリント基板、１４・・・ＶＣＯ１１５・・・サブキャ
リア、１６〜２２・・・ビス、２３・・・間隙。FIG. 1 is a partial plan view of an embodiment of the abnormal resonance prevention printed circuit board of the present invention, FIG. 2 is a plan view of this embodiment when it is mounted, and FIG. 3 is a partial plan view of an example of a conventional printed circuit board. FIG. 4 is a sectional view taken along line AA' in FIG. 3 (FIG. 2). 1 to 7... Screw holes, 8, 9... VC○ output terminal hole and strip line, 10.11... vCO power supply terminal hole and power line, 12... Slit hole, 13...
Printed circuit board, 14...VCO115...subcarrier, 16-22...screw, 23...gap.
Claims (1)
アをビスで固定して形成した異常共振防止プリント基板
において、前記サブキャリアをプリント基板に固定する
よう配置した特定のビス穴の間に所定長さのスリット穴
を配設することにより、前記ビス穴間隔による共振を防
止したことを特徴とする異常共振防止プリント基板。In an abnormal resonance prevention printed circuit board formed by fixing a subcarrier on which an MIC voltage-controlled oscillator is mounted with screws, a predetermined length is inserted between specific screw holes arranged to fix the subcarrier to the printed circuit board. 1. A printed circuit board for preventing abnormal resonance, characterized in that resonance due to the spacing between the screw holes is prevented by providing slit holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63204078A JP2623742B2 (en) | 1988-08-16 | 1988-08-16 | Abnormal resonance prevention printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63204078A JP2623742B2 (en) | 1988-08-16 | 1988-08-16 | Abnormal resonance prevention printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0252493A true JPH0252493A (en) | 1990-02-22 |
| JP2623742B2 JP2623742B2 (en) | 1997-06-25 |
Family
ID=16484414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63204078A Expired - Lifetime JP2623742B2 (en) | 1988-08-16 | 1988-08-16 | Abnormal resonance prevention printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2623742B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8817470B2 (en) | 2009-10-16 | 2014-08-26 | Fujitsu Limited | Electronic device and complex electronic device |
| US11978875B2 (en) | 2017-01-03 | 2024-05-07 | Lg Energy Solution, Ltd. | System for cooling components arranged within an enclosure |
-
1988
- 1988-08-16 JP JP63204078A patent/JP2623742B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8817470B2 (en) | 2009-10-16 | 2014-08-26 | Fujitsu Limited | Electronic device and complex electronic device |
| US11978875B2 (en) | 2017-01-03 | 2024-05-07 | Lg Energy Solution, Ltd. | System for cooling components arranged within an enclosure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2623742B2 (en) | 1997-06-25 |
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