JPH0310502A - Voltage controlled oscillator - Google Patents
Voltage controlled oscillatorInfo
- Publication number
- JPH0310502A JPH0310502A JP14580689A JP14580689A JPH0310502A JP H0310502 A JPH0310502 A JP H0310502A JP 14580689 A JP14580689 A JP 14580689A JP 14580689 A JP14580689 A JP 14580689A JP H0310502 A JPH0310502 A JP H0310502A
- Authority
- JP
- Japan
- Prior art keywords
- section
- partition plate
- metal case
- strip line
- electronic components
- 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 14
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 abstract description 14
- 238000010168 coupling process Methods 0.000 abstract description 14
- 238000005859 coupling reaction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Landscapes
- Waveguide Connection Structure (AREA)
- Waveguides (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高周波無線装置等で使用されるストリップ線路
を利用した電圧制御発振器（以下「ｖＣＯ」と称する）
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a voltage controlled oscillator (hereinafter referred to as "vCO") using a strip line used in high frequency radio equipment, etc.
It is related to.
従来、例えばＵＨＦ帯に属する発振信号を出力するよう
なｖＣＯにおいては、ＵＨＦ帯の周波数が高く、使用す
る共振回路のインダクタンス及びキャバスタンスは小さ
くなるため、所定出力を安定に得るように構成しようと
すると実際上共振回路の構成が複雑になる。そのため、
従来、共振回路部分にストリップ線路を用いて所定特性
をできるだけ簡易な構成で得るようにしたものがある（
例えば、本出願人が先に出願した特願昭６２−１８５４
５６号参照）。Conventionally, in a vCO that outputs an oscillation signal belonging to the UHF band, for example, since the frequency of the UHF band is high and the inductance and cavastance of the resonant circuit used are small, attempts have been made to configure it to stably obtain a predetermined output. This actually complicates the configuration of the resonant circuit. Therefore,
Conventionally, there are devices that use strip lines in the resonant circuit part to obtain the specified characteristics with the simplest possible configuration.
For example, patent application No. 62-1854 filed earlier by the present applicant.
(See No. 56).
第２図はこのｖＣＯの回路構成を示す回路図である。同
図に示すように、ｖｃｏは発振部１ｏと増幅部２０とか
らなる。FIG. 2 is a circuit diagram showing the circuit configuration of this vCO. As shown in the figure, the VCO consists of an oscillating section 1o and an amplifying section 20.
発振部１０はトランジスタＱ、と、そのコレクタ・エミ
ッタ間に接続された第１の容量素子ｃｌと、そのベース
・エミッタ間に接続された容量素子Ｃ８と、そのベース
に接続されたストリップ線路り、と、直流カット用容量
素子ｃ４と、可変容量ダイオードＶＤ、と、バイアスコ
ンデンサＣ１とでコルピッツ発振器を構成している。な
お、Ｒ１はエミッタ抵抗器、Ｒｓｌ Ｒ４はトランジス
タＱ１のベースに所定の電圧を印加するための抵抗器で
ある。トランジスタＱ、のコレクタ・エミッタ間及びベ
ース・エミッタ間には、それぞれコルピッツ発振回路を
形成し、その発振周波数は容量素子Ｃ１及び容量素子〇
、で決定きれる。トランジスタＱ、のベースには、同様
にコルピッツ発振回路を形成し、その発振周波数は可変
容量ダイオードＶＤ１と直流カット用容量素子Ｃ４とス
トリップ線路Ｌ１で構成される誘導性リアクタンス部で
決定される。The oscillation unit 10 includes a transistor Q, a first capacitive element cl connected between its collector and emitter, a capacitive element C8 connected between its base and emitter, and a strip line connected to its base. A Colpitts oscillator is composed of the capacitive element c4 for cutting DC, the variable capacitance diode VD, and the bias capacitor C1. Note that R1 is an emitter resistor, and Rsl R4 is a resistor for applying a predetermined voltage to the base of the transistor Q1. A Colpitts oscillation circuit is formed between the collector and emitter and between the base and emitter of the transistor Q, and the oscillation frequency thereof can be determined by the capacitor C1 and the capacitor 0. A Colpitts oscillator circuit is similarly formed at the base of the transistor Q, and its oscillation frequency is determined by an inductive reactance section composed of a variable capacitance diode VD1, a DC cut capacitive element C4, and a strip line L1.
制御電圧信号ＣＯＮが変化すると、これに応じて可変容
量ダイオードＶ Ｄ ｔの値が変化し、誘導性リアクタ
ンスも変化し、発振回路の発振周波数もこの制御電圧信
号ＣＯＮに応じ変化する。When the control voltage signal CON changes, the value of the variable capacitance diode V D t changes accordingly, the inductive reactance also changes, and the oscillation frequency of the oscillation circuit also changes according to the control voltage signal CON.
増幅部２０は、Ｆ Ｅ Ｔ Ｑ ＊と、該Ｆ Ｅ Ｔ
Ｑ ＊のゲートバイアス抵抗器Ｒ１と、ソース抵抗器Ｒ
４と、バイパスコンデンサＣ１と、ストリップ線路Ｌ
ｌ ｅＬ、と、容量素子Ｃ，とで構成されている。ここ
でストリップ線路り、、Ｌ、及び容量素子Ｃ２はＦＥＴ
Ｑ、の出力整合回路を構成している。Ｃ６は直流カット
用容量素子、Ｃ６は発振部１０と増幅部２０を結合する
結合容量素子である。The amplifying section 20 has FETQ* and the FETQ
Q* gate bias resistor R1 and source resistor R
4, bypass capacitor C1, and strip line L
1 eL, and a capacitive element C. Here, the strip line, L, and capacitive element C2 are FETs.
Q, constitutes an output matching circuit. C6 is a capacitive element for DC cutting, and C6 is a coupling capacitive element that couples the oscillating section 10 and the amplifying section 20.
しかしながら上記構成のｖＣＯにおいて、基本回路を構
成する各種電子部品の搭載並びに基板パターンの引き回
し位置によって次のような問題がある。However, the vCO having the above configuration has the following problems depending on the mounting of various electronic components constituting the basic circuit and the routing position of the board pattern.
即ち、第３図に示すように発振部１ｏのストリップ線路
ＬＩのインダクタンスと各種搭載部品３１．３２との間
で空間結合３３．３４が生じ、これが発振部１０の発振
周波数特性に悪影響を与え、ｖＣＯの電気的特性である
Ｓ／Ｎ特性等が劣化する。That is, as shown in FIG. 3, spatial coupling 33.34 occurs between the inductance of the strip line LI of the oscillation section 1o and the various mounted components 31.32, which adversely affects the oscillation frequency characteristics of the oscillation section 10. The S/N characteristics, which are the electrical characteristics of vCO, deteriorate.
また、増幅部２０のストリップ線路Ｌ＊、Ｌｓのインダ
クタンスと各種搭載部品３１．３２との間にも空間結合
３５，３６．３７が生じ、これが増幅部２０の前記出力
整合回路にインピーダンスに影響を与え、インピーダン
ス整合がとれず、ｖＣＯの電気的特性であるＳ／Ｎ特性
等が劣化する。In addition, spatial coupling 35, 36, 37 also occurs between the inductance of the strip lines L*, Ls of the amplifier section 20 and various mounted components 31, 32, and this affects the impedance of the output matching circuit of the amplifier section 20. Therefore, impedance matching cannot be achieved, and the S/N characteristics, which are the electrical characteristics of vCO, deteriorate.
本発明は上述の点に鑑みて成されたもので、発振部及び
増幅部のストリップ線路と各種搭載電子部品の空間結合
によるＳ／Ｎ等の特性劣化を除去する電圧制御発振器を
提供することにある。The present invention has been made in view of the above points, and an object of the present invention is to provide a voltage controlled oscillator that eliminates characteristic deterioration such as S/N due to spatial coupling between the strip line of the oscillating section and the amplifying section and various mounted electronic components. be.
上記課題を解決するため本発明は、基板上に、発振部を
構成するストリップ線路及び各種電子部品と、増幅部を
構成するストリップ線路及び各種電子部品を搭載し、そ
の上を金属ケースで覆った構造の電圧制御発振器におい
て、少なくとも発振部と増幅部の間の金属ケースと基板
の間に金属製の仕切板を設けたことを特徴とする。In order to solve the above problems, the present invention mounts a strip line and various electronic components constituting an oscillating section and a strip line and various electronic components constituting an amplifying section on a substrate, and covers them with a metal case. The voltage controlled oscillator according to the present invention is characterized in that a metal partition plate is provided between the metal case and the substrate at least between the oscillation section and the amplification section.
上記の如く構成することにより、発振部のストリップ線
路のインダクタンスと増幅部の電子部品との間に空間結
合及び増幅部のストリップ線路と発振部の電子部品の空
間結合が金属製の仕切板により遮断されるから、ｖＣＯ
のＳ／Ｎ等の特性劣化を防止できる。With the above configuration, the spatial coupling between the inductance of the strip line in the oscillation section and the electronic components of the amplification section and the spatial coupling between the strip line of the amplification section and the electronic components of the oscillation section are blocked by the metal partition plate. Because it is done, vCO
Deterioration of characteristics such as S/N can be prevented.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明に係る電圧制御発振器の構造を示す断面
図である。同図において、１はガラスエポキシ樹脂等か
らなる基板であり、該基板１の上には発振部１０を構成
するストリップ線路り、及び電子部品１１．１２と、増
幅部２ｏを構成するストリップ線路Ｌ＊、Ｌｓ及び電子
部品２１が実装されている。この電子部品１１．１２は
第２図のトランジスタＱ、や可変容量ダイオードＶ Ｄ
＋等に相当し、電子部品２１はＦ Ｅ Ｔ Ｑ ＊等
に相当する、基板１の上は金属ケース２で覆われており
、発振部１０と増幅部２０の間の基板１と金属ケース２
との間に仕切板３が設けられている。FIG. 1 is a sectional view showing the structure of a voltage controlled oscillator according to the present invention. In the figure, reference numeral 1 denotes a substrate made of glass epoxy resin or the like, and on the substrate 1 are mounted a strip line L constituting the oscillating section 10, electronic components 11 and 12, and a strip line L constituting the amplifying section 2o. *, Ls and electronic components 21 are mounted. These electronic components 11 and 12 are the transistor Q and variable capacitance diode V D shown in Figure 2.
+, etc., and the electronic component 21 corresponds to FETQ*, etc. The top of the board 1 is covered with a metal case 2, and the board 1 and metal case 2 are connected between the oscillation section 10 and the amplification section 20.
A partition plate 3 is provided between the two.
上記の如く発振部１０と増幅部２ｏの間の基板１と金属
ケース２との間に仕切板３を設けることにより、該仕切
板３はストリップ線路Ｌ１のインダクタンスと電子部品
２１の空間結合及びストリップ線路Ｌｍ、Ｌｍのインダ
クタンスと電子部品１１．１２の空間結合を遮断する作
用を奏する。従って、発振部１０の発振周波数特性、増
幅部２゜のインピーダンス整合性及びＳ／Ｎ特性等のｖ
ｃＯの電気的特性に悪影響を与える空間的結合が遮断き
れるから、ｖＣＯの電気的特性は改善されることになる
。By providing the partition plate 3 between the substrate 1 and the metal case 2 between the oscillation unit 10 and the amplification unit 2o as described above, the partition plate 3 is capable of achieving spatial coupling between the inductance of the strip line L1 and the electronic component 21 and the strip It has the effect of cutting off the spatial coupling between the inductance of the lines Lm, Lm and the electronic components 11 and 12. Therefore, v
Since the spatial coupling that adversely affects the electrical properties of cO is completely blocked, the electrical properties of vCO are improved.
なお、上記実施例では発振部１０と増幅部２０の間の基
板１と金属ケース２との間に仕切板３を設けたが、仕切
板３はこの部分のみに限定されるものではなく、例えば
、発振部１０のストリップ線路Ｌ１と電子部品１１．１
２の間の基板１と金属ケース２との間、更には増幅部２
０のストリップ線路り、と電子部品２１の間及びストリ
ップ線路Ｌ１と電子部品２１の間の基板１と金属ケース
２との間に設けることにより、上記のような空間的結合
をより完全に遮断でき、ｖＣＯの電気的特性はさらに改
善されることになる。In the above embodiment, the partition plate 3 was provided between the substrate 1 and the metal case 2 between the oscillation unit 10 and the amplification unit 20, but the partition plate 3 is not limited to this portion only, and for example, , the strip line L1 of the oscillation unit 10 and the electronic component 11.1
2 between the substrate 1 and the metal case 2, and further between the amplifying section 2
By providing the circuit board 1 and the metal case 2 between the strip line L1 and the electronic component 21 and between the strip line L1 and the electronic component 21, the above spatial coupling can be more completely blocked. , the electrical properties of vCO will be further improved.
以上説明したように本発明によれば、少なくとも発振部
と増幅部の間の金属ケースと基板の間に金属製の仕切板
を設けたので、発振部のストリップ線路のインダクタン
スと増幅部の電子部品との間に空間結合及び増幅部のス
トリップ線路のインダクタンスと発振部の電子部品の空
間結合が、こ金属製の仕切板により防止されるから、ｖ
ＣＯのＳ／Ｎ等の電気的特性が大幅に改善できる。As explained above, according to the present invention, a metal partition plate is provided between the metal case and the board between at least the oscillation section and the amplification section, so that the inductance of the strip line of the oscillation section and the electronic components of the amplification section are This metal partition plate prevents spatial coupling between the inductance of the strip line in the amplification section and the electronic components of the oscillation section, so that v
Electrical characteristics such as S/N of CO can be significantly improved.
第１図は本発明に係る電圧制御発振器の構造を示す断面
図、第２図はこのｖＣｏの回路構成を示す回路図、第３
図はｖＣＯの各部品間の空間結合を説明するための図で
ある。
図中、１・・・・基板、２・・・・金属製ケース、３・
・・・仕切板、１０・・・・発振部、１１．１２・・・
・電子部品、２０・・・・増幅部、２１・・・・電子部
品、Ｌｌｌ Ｌｌｌ Ｌｍ・・・・ストリップ線路。FIG. 1 is a cross-sectional view showing the structure of a voltage controlled oscillator according to the present invention, FIG. 2 is a circuit diagram showing the circuit configuration of this vCo, and FIG.
The figure is a diagram for explaining the spatial connections between the parts of the vCO. In the figure, 1... board, 2... metal case, 3...
... Partition plate, 10... Oscillation section, 11.12...
・Electronic component, 20...Amplification section, 21...Electronic component, Lll Lll Lm...Strip line.
Claims (1)
電子部品と、増幅部を構成するストリップ線路及び各種
電子部品を搭載し、その上を金属ケースで覆った構造の
電圧制御発振器において、少なくとも前記発振部と前記
増幅部の間の前記金属ケースと基板の間に金属製の仕切
板を設けたことを特徴とする電圧制御発振器。In a voltage controlled oscillator having a structure in which a strip line and various electronic components constituting an oscillation section and a strip line and various electronic components constituting an amplification section are mounted on a substrate and covered with a metal case, at least the oscillation A voltage controlled oscillator characterized in that a metal partition plate is provided between the metal case and the substrate between the amplifier section and the amplifier section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14580689A JPH0310502A (en) | 1989-06-08 | 1989-06-08 | Voltage controlled oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14580689A JPH0310502A (en) | 1989-06-08 | 1989-06-08 | Voltage controlled oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0310502A true JPH0310502A (en) | 1991-01-18 |
Family
ID=15393580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14580689A Pending JPH0310502A (en) | 1989-06-08 | 1989-06-08 | Voltage controlled oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0310502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2376207A (en) * | 2001-05-25 | 2002-12-11 | Kyocera Corp | Ceramic laminates and laminated electronic parts |
-
1989
- 1989-06-08 JP JP14580689A patent/JPH0310502A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2376207A (en) * | 2001-05-25 | 2002-12-11 | Kyocera Corp | Ceramic laminates and laminated electronic parts |
| GB2376207B (en) * | 2001-05-25 | 2005-03-30 | Kyocera Corp | Method of producing ceramic laminates,laminated electronic parts and method of producing the same |
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