JPH05145338A - Dielectric oscillation circuit - Google Patents
Dielectric oscillation circuitInfo
- Publication number
- JPH05145338A JPH05145338A JP32973391A JP32973391A JPH05145338A JP H05145338 A JPH05145338 A JP H05145338A JP 32973391 A JP32973391 A JP 32973391A JP 32973391 A JP32973391 A JP 32973391A JP H05145338 A JPH05145338 A JP H05145338A
- Authority
- JP
- Japan
- Prior art keywords
- coupling capacitor
- varactor diode
- dielectric
- conductor pattern
- dielectric resonator
- 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
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
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はマイクロ波帯ＴＥＭモー
ド誘電体発振回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave band TEM mode dielectric oscillator circuit.
【０００２】[0002]
【従来の技術】従来のこの種の発振回路は、図２に示す
ように、プリント基板７の表面上にＴＥＭモード誘電体
共振器１を搭載するとともに、プリント基板７の表面に
形成した導体パターン８を利用してバラクタダイオード
２、結合コンデンサ３、発振用トランジスタ４と、結合
コンデンサ５を実装し、接続端子６を利用して前記ＴＥ
Ｍモード誘電体共振器１に電気接続した構成とされてい
る。2. Description of the Related Art In a conventional oscillation circuit of this type, as shown in FIG. 2, a TEM mode dielectric resonator 1 is mounted on the surface of a printed circuit board 7 and a conductor pattern formed on the surface of the printed circuit board 7. 8 is used to mount the varactor diode 2, the coupling capacitor 3, the oscillation transistor 4, and the coupling capacitor 5, and the connection terminal 6 is used to implement the TE
It is configured to be electrically connected to the M-mode dielectric resonator 1.
【０００３】[0003]
【発明が解決しようとする課題】このような従来の誘電
体発振回路では、共振回路の一部であるバラクタダイオ
ード２の回路部がプリント基板７の表面上に実装されて
いるため、導体パターン８の寄生インダクタンス、特に
バラクタダイオード２のグランドとＴＥＭモード誘電体
共振器１のグランドの間の接続パターンに寄生インダク
タンスが生じ易い。この寄生インダクタンスはマイクロ
波帯では無視することができず、バラクタダイオード２
と結合コンデンサ３との直列容量と、寄生インダクタン
スとによる直列共振周波数が発振周波数帯に近くなるた
め、発振回路がこの影響を受け、発振周波数のジャン
プ、変調特性の直線性不良、Ｃ／Ｎの劣化等が生じると
いう問題がある。本発明の目的は、寄生インダクタンス
を低減して特性の良い誘電体発振回路を提供することに
ある。In such a conventional dielectric oscillator circuit, since the circuit portion of the varactor diode 2 which is a part of the resonance circuit is mounted on the surface of the printed board 7, the conductor pattern 8 is formed. Parasitic inductance, especially in the connection pattern between the ground of the varactor diode 2 and the ground of the TEM mode dielectric resonator 1 is likely to occur. This parasitic inductance cannot be ignored in the microwave band, and the varactor diode 2
Since the series resonance frequency due to the series capacitance between the capacitor 3 and the coupling capacitor 3 and the parasitic inductance is close to the oscillation frequency band, the oscillation circuit is affected by this, and the oscillation frequency jumps, the linearity of the modulation characteristic is poor, and the C / N There is a problem that deterioration or the like occurs. An object of the present invention is to provide a dielectric oscillating circuit with reduced parasitic inductance and excellent characteristics.
【０００４】[0004]
【課題を解決するための手段】本発明の誘電体発振回路
は、プリント基板上に構築する誘電体発振回路のバラタ
クダイオードと結合コンデンサを、プリント基板上に搭
載したＴＥＭモード誘電体共振器の表面に設けた導体パ
ターン上に搭載している。A dielectric oscillator circuit of the present invention is a TEM mode dielectric resonator in which a varactor diode and a coupling capacitor of a dielectric oscillator circuit constructed on a printed circuit board are mounted on the printed circuit board. It is mounted on the conductor pattern provided on the surface.
【０００５】[0005]
【作用】バラクダダイオードと結合コンデンサを誘電体
共振器の表面に搭載することで、これらダイオード及び
コンデンサを接続するための導体パターンを小さくで
き、寄生インダクタンスを低減する。By mounting the varactor diode and the coupling capacitor on the surface of the dielectric resonator, the conductor pattern for connecting the diode and the capacitor can be made small and the parasitic inductance can be reduced.
【０００６】[0006]
【実施例】次に、本発明について図面を参照して説明す
る。図１は本発明の誘電体発振回路の一実施例の模式的
な斜視図である。同図において、１はλ／４タイプのＴ
ＥＭモード誘電体共振器であり、プリント基板７上に搭
載される。又、プリント基板７の表面には導体パターン
８には発振トランジスタ４と結合コンデンサ５を実装し
ており、前記誘電体共振器１と接続端子６を介して電気
接続している。一方、前記誘電体共振器１の絶縁表面に
は導体パターン９を形成し、ここにバラクタダイオード
２と結合コンデンサ３を搭載し、電気接続を行ってい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of an embodiment of the dielectric oscillator circuit of the present invention. In the figure, 1 is a λ / 4 type T
It is an EM mode dielectric resonator and is mounted on the printed circuit board 7. Further, an oscillation transistor 4 and a coupling capacitor 5 are mounted on a conductor pattern 8 on the surface of the printed board 7, and are electrically connected to the dielectric resonator 1 via a connection terminal 6. On the other hand, a conductor pattern 9 is formed on the insulating surface of the dielectric resonator 1, and a varactor diode 2 and a coupling capacitor 3 are mounted on the conductor pattern 9 for electrical connection.
【０００７】このように、ＴＥＭモード誘電体共振器１
の表面にバラクタダイオード２と結合コンデンサ３が搭
載されることで、結合コンデンサ３は誘電体共振器１の
内部導体に最短で接続でき、かつバラクタダイオード２
も誘電体共振器１の外部導体１Ａに最短で接続できるた
め、プリント基板７の表面における導体パターン８の面
積を低減でき、その寄生インダクタンスを非常に小さな
ものにすることができる。Thus, the TEM mode dielectric resonator 1
By mounting the varactor diode 2 and the coupling capacitor 3 on the surface of the coupling capacitor 3, the coupling capacitor 3 can be connected to the inner conductor of the dielectric resonator 1 in the shortest distance, and the varactor diode 2 can be connected.
Since it can be connected to the outer conductor 1A of the dielectric resonator 1 in the shortest distance, the area of the conductor pattern 8 on the surface of the printed board 7 can be reduced and the parasitic inductance thereof can be made extremely small.
【０００８】これにより、バラクタダイオード２と結合
コンデンサ３との直列容量と、寄生インダクタンスとに
よる共振の発生を抑制でき、発振回路における発振周波
数のジャンプ、変調特性の直線性不良、Ｃ／Ｎの劣化等
を未然に回避することが可能となる。尚、この実施例で
はλ／４タイプの誘電体共振器で例示しているが、λ／
２タイプの誘電体共振器でも同様に構成することができ
る。As a result, the occurrence of resonance due to the series capacitance of the varactor diode 2 and the coupling capacitor 3 and the parasitic inductance can be suppressed, the oscillation frequency jump in the oscillation circuit, the linearity of the modulation characteristic is poor, and the C / N is deteriorated. It is possible to avoid such problems. In this embodiment, a λ / 4 type dielectric resonator is shown as an example.
The same can be applied to the two types of dielectric resonators.
【０００９】[0009]
【発明の効果】以上説明したように本発明は、バラクタ
ダイオード及び結合コンデンサを誘電体共振器の表面に
搭載しているので、これらダイオード及び結合コンデン
サを搭載するための導体パターンを小さくし、その寄生
インダクタンスを小さくし、発振周波数のジャンプ、変
調特性の直線の劣化、及びＣ／Ｎの劣化等を防止し、発
振特性を改善することができる効果がある。As described above, according to the present invention, since the varactor diode and the coupling capacitor are mounted on the surface of the dielectric resonator, the conductor pattern for mounting the diode and the coupling capacitor can be made small, and There is an effect that the parasitic inductance can be reduced, the jump of the oscillation frequency, the deterioration of the straight line of the modulation characteristic, the deterioration of the C / N, etc. can be prevented, and the oscillation characteristic can be improved.
【図１】本発明の誘電体発振回路の一実施例の模式的な
斜視図である。FIG. 1 is a schematic perspective view of an embodiment of a dielectric oscillator circuit of the present invention.
【図２】従来の誘電体発振回路の一例の模式的な斜視図
である。FIG. 2 is a schematic perspective view of an example of a conventional dielectric oscillator circuit.
１ ＴＥＭモード誘電体共振器 ２ バラクタダイオード ３ 結合コンデンサ ４ 発振トランジスタ ５ 結合コンデンサ ６ 接続端子 ７ プリント基板 ８，９ 導体パターン 1 TEM mode dielectric resonator 2 Varactor diode 3 Coupling capacitor 4 Oscillation transistor 5 Coupling capacitor 6 Connection terminal 7 Printed circuit board 8, 9 Conductor pattern
Claims (1)
バラクタダイオード、結合コンデンサ、発振トランジス
タ等をプリント基板上に構築する誘電体発振回路におい
て、前記バラタクダイオードと結合コンデンサを前記誘
電体共振器の表面に設けた導体パターン上に搭載するこ
とを特徴とする誘電体発振回路。1. At least a TEM mode dielectric resonator,
In a dielectric oscillator circuit in which a varactor diode, a coupling capacitor, an oscillation transistor, etc. are built on a printed circuit board, the varactor diode and the coupling capacitor are mounted on a conductor pattern provided on the surface of the dielectric resonator. Dielectric oscillator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32973391A JPH05145338A (en) | 1991-11-20 | 1991-11-20 | Dielectric oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32973391A JPH05145338A (en) | 1991-11-20 | 1991-11-20 | Dielectric oscillation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05145338A true JPH05145338A (en) | 1993-06-11 |
Family
ID=18224669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32973391A Pending JPH05145338A (en) | 1991-11-20 | 1991-11-20 | Dielectric oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05145338A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6885261B2 (en) | 2000-01-18 | 2005-04-26 | Murata Manufacturing Co., Ltd. | Dielectric filter, antenna sharing device, and communication device having a voltage controlled reactance element for tuning the center frequency |
| US8217497B2 (en) | 2007-01-17 | 2012-07-10 | International Business Machines Corporation | FIN differential MOS varactor diode |
-
1991
- 1991-11-20 JP JP32973391A patent/JPH05145338A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6885261B2 (en) | 2000-01-18 | 2005-04-26 | Murata Manufacturing Co., Ltd. | Dielectric filter, antenna sharing device, and communication device having a voltage controlled reactance element for tuning the center frequency |
| US8217497B2 (en) | 2007-01-17 | 2012-07-10 | International Business Machines Corporation | FIN differential MOS varactor diode |
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