JPH01190008A - Varactor loading dielectric resonator and voltage controlled oscillator - Google Patents
Varactor loading dielectric resonator and voltage controlled oscillatorInfo
- Publication number
- JPH01190008A JPH01190008A JP1389588A JP1389588A JPH01190008A JP H01190008 A JPH01190008 A JP H01190008A JP 1389588 A JP1389588 A JP 1389588A JP 1389588 A JP1389588 A JP 1389588A JP H01190008 A JPH01190008 A JP H01190008A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric resonator
- wavelength
- microstrip line
- varactor
- length
- 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
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 238000010586 diagram Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (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、マイクロ波帯、ミリ波帯の送受信装置等で使
用されるバラクタ装荷誘電体共振器と電圧制御型発振器
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a varactor-loaded dielectric resonator and a voltage-controlled oscillator used in microwave band, millimeter wave band transmitting/receiving devices, and the like.
従来の技術
第３図に従来のバラクタ装荷誘電体共振器の構成を示す
。以下図面を参照しながら、従来のバラクタ装荷誘電体
共振器の動作について説明する。BACKGROUND OF THE INVENTION FIG. 3 shows the configuration of a conventional varactor-loaded dielectric resonator. The operation of a conventional varactor-loaded dielectric resonator will be described below with reference to the drawings.
第３図において、３は先端開放・任意長の第一のマイク
ロ・ストリップ線路、４は先端開放・任意長の第二のマ
イクロ・ストリップ線路、Ｓは誘電体基板、６はバラク
タ・ダイオード、７は高周波チヲーク回路、８は電圧制
御端子、９は誘電体共振器、１ｏは結合点である。バラ
クタ装荷誘電体共振器は、バラクタ・ダイオード６のダ
イオード接合部に加えられる電圧により共振周波数が変
化する電圧可変型共振器である。制御電圧は、電圧制御
端子８から高周波チョーク回路７を通ってバラクタ・ダ
イオード６に印加される。誘電体共振器９の共振モード
として円型ＴＫＯ１モードを用いるとすれば、誘電体共
振器９を第一のマイクロ・ストリップ線路３に接近させ
て置くことにより、磁界結合させることができる。誘電
体共振器９と第一のマイクロ・ストリップ線路３の距離
によシ、誘電体共振器９とバラクタ装荷回路との結合度
を調整し、電圧制御特性を設定する。In FIG. 3, 3 is a first microstrip line with an open end and an arbitrary length, 4 is a second microstrip line with an open end and an arbitrary length, S is a dielectric substrate, 6 is a varactor diode, and 7 is a microstrip line with an open end and an arbitrary length. 8 is a voltage control terminal, 9 is a dielectric resonator, and 1o is a coupling point. The varactor-loaded dielectric resonator is a voltage variable resonator whose resonant frequency changes depending on the voltage applied to the diode junction of the varactor diode 6. A control voltage is applied from voltage control terminal 8 to varactor diode 6 through high frequency choke circuit 7 . If the circular TKO1 mode is used as the resonance mode of the dielectric resonator 9, magnetic field coupling can be achieved by placing the dielectric resonator 9 close to the first microstrip line 3. Depending on the distance between the dielectric resonator 9 and the first microstrip line 3, the degree of coupling between the dielectric resonator 9 and the varactor-loaded circuit is adjusted to set voltage control characteristics.
発明が解決しようとする課題
しかしながら、上記のような構成では、バラクタ装荷回
路の制御電圧に対するインピーダンスの変化量や誘電体
共振器とマイクロ・ストリップ線路との結合度が最大化
されていないことはもちろん、両者を同時に満足できる
ものではない。したがって、制御電圧に対する共振周波
数の変化範囲があまシ大きくとれず、また、その結果制
御特性の線形性も悪いという問題点がある。Problems to be Solved by the Invention However, with the above configuration, it goes without saying that the amount of change in impedance with respect to the control voltage of the varactor-loaded circuit and the degree of coupling between the dielectric resonator and the microstrip line are not maximized. , it is not possible to satisfy both at the same time. Therefore, there is a problem that the change range of the resonant frequency with respect to the control voltage cannot be made very wide, and as a result, the linearity of the control characteristics is also poor.
そこで、本発明は上記問題点に鑑み、制御電圧に対する
共振周波数の変化範囲が大きくとれ、制御特性の線形性
も良いバラクタ装荷誘電体共振器を提供することを目的
としている。SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a varactor-loaded dielectric resonator in which the resonant frequency can vary over a wide range with respect to the control voltage, and the linearity of the control characteristics is good.
課題を解決するための手段
上記課題を解決するために本発明は、バラクタ・ダイオ
ードの第一の端子は使用周波数の略４分の３波長の長さ
を持つ先端開放の第一のマイクロ・ストリップ線路に接
続し、バラクタ・ダイオードの第二の端子は略４分の１
波長の長さを持つ先端開放の第二のマイクロ・ストリッ
プ線路に接続し、誘電体共振器との結合は第一のマイク
ロ・ストリップ線路の開放端から略４分の１波長の位置
で磁界結合させるという構成を備えたものである。Means for Solving the Problems In order to solve the above problems, the present invention provides that the first terminal of the varactor diode is a first open-ended microstrip having a length of approximately three quarters of the wavelength of the operating frequency. line and the second terminal of the varactor diode is approximately 1/4
It is connected to a second open-ended microstrip line with a wavelength length, and the coupling with the dielectric resonator is performed by magnetic field coupling at a position approximately 1/4 wavelength from the open end of the first microstrip line. It is equipped with a configuration that allows
作用
本発明は上記した構成によシ、（１）第一のマイクロ・
ストリップ線路と第二のマイクロ・ストリップ線路の長
さの和を使用周波数の略２分の１波長のできるだけ小さ
い１以上の整数倍の長さにしてバラクタ・ダイオードを
装荷したバラクタ装荷回路を使用周波数において共振状
態にすること、（２）バラクタ・ダイオードの挿入位置
をバラクタ装荷回路上の電流最大点にすること、（３）
誘電体共振器との結合点をバラクタ装荷回路上の電流最
大点にすること、（４）バラクタ・ダイオードの挿入位
置と誘電体共振器との結合位置を場所的に分離しバラク
タ・ダイオードが邪魔にならないようにして誘電体共振
器をマイクロ・ストリップ線路に十分近づけられるよう
にすることという４つの条件を同時に満足することがで
き、これらの条件は誘電体共振器も含めたバラクタ装荷
誘電体共振器の共振周波数の制御電圧に対する感度を大
きくするための最適化条件になっているので、バラクタ
装荷誘電体共振器の共振周波数の可変範囲を広くするこ
とができる。Operation The present invention has the above-described configuration, (1) the first micro-
The sum of the lengths of the strip line and the second micro-strip line is set to a length that is an integer multiple of 1 or more as small as possible to approximately half the wavelength of the operating frequency, and a varactor-loaded circuit loaded with a varactor diode is used at the operating frequency. (2) Place the varactor diode at the maximum current point on the varactor-loaded circuit; (3)
(4) The insertion position of the varactor diode and the coupling position with the dielectric resonator are separated in location to prevent the varactor diode from getting in the way. It is possible to simultaneously satisfy the four conditions of making it possible to bring the dielectric resonator close enough to the microstrip line so that the dielectric resonator does not become Since the optimization conditions are for increasing the sensitivity of the resonant frequency of the resonator to the control voltage, it is possible to widen the variable range of the resonant frequency of the varactor-loaded dielectric resonator.
実施例
まず最初に、請求項１記載の発明の実施例について説明
する。本発明の目的は、制御電圧に対する共振周波数の
変化範囲が大きくとれ、制御特性の線形性も良いバラク
タ装荷誘電体共振器を提供することである。Embodiments First, an embodiment of the invention set forth in claim 1 will be described. An object of the present invention is to provide a varactor-loaded dielectric resonator that allows a wide range of change in resonance frequency with respect to a control voltage and has good linearity in control characteristics.
第１図は本発明のバラクタ装荷誘電体共振器の一実施例
を示す構成図でおる。第１図において、１は使用周波数
の略４分の３波長の長さを持つ先端開放のマイクロ・ス
トリップ線路、２は略４分の１波長の長さを持つ先端開
放のマイクロ・ストリップ線路である。本発明において
は、第一のマイクロ・ストリップ線路１の長さを使用周
波数の略４分の３波長の長さとし、第二のマイクロ・ス
トリップ線路２の長さを略４分の１波長の長さとし、誘
電体共振器との結合を第一のマイクロ・ストリップ線路
の開放端から略４分の１波長の位置で磁界結合させたこ
とが特徴である。まず、第一のマイクロ・ストリップ線
路と第二のマイクロ・ストリップ線路の長さの和を見て
みると、使用周波数の２分の１波長の２倍の長さになっ
ており、条件（１）を満足する。次に、バラクタ・ダイ
オードの挿入位置および誘電体共振器の結合点の位置を
見てみると、それぞれ第一のマイクロ・ス） ＩＪツブ
線路、第二のマイクロ・ストリップ線路の開放端から４
分の１波長の位置罠なっており、これらは電流最大点で
あシ、条件＠） 、 （３）を満足する。最後に、条件
（４）Ｋついて見てみるが、その前にこれについてもっ
と詳しく説明をしておく。FIG. 1 is a block diagram showing an embodiment of a varactor-loaded dielectric resonator according to the present invention. In Figure 1, 1 is an open-ended microstrip line with a length of approximately three-quarters of the wavelength of the frequency used, and 2 is an open-ended microstrip line with a length of approximately one-quarter wavelength. be. In the present invention, the length of the first microstrip line 1 is approximately three-quarters of the wavelength of the operating frequency, and the length of the second microstrip line 2 is approximately one-fourth of the wavelength. The feature is that the coupling with the dielectric resonator is performed by magnetic field coupling at a position approximately 1/4 wavelength from the open end of the first microstrip line. First, if we look at the sum of the lengths of the first microstrip line and the second microstrip line, we find that it is twice the length of half the wavelength of the operating frequency, which satisfies the condition (1 ) is satisfied. Next, if we look at the insertion position of the varactor diode and the position of the coupling point of the dielectric resonator, we can see that the position is 4 from the open end of the first micro strip line and the second micro strip line, respectively.
These are position traps of 1/1 wavelength, and these are the maximum current points, satisfying the conditions @) and (3). Finally, we will look at condition (4) K, but before that, let us explain this in more detail.
条件（１）において、バラクタ回路を共振状態にするた
めに、第一のマイクロ・ストリップ線路と第二のマイク
ロ・ストリップ線路の長さの和は２分の１波長の整数倍
であることが要請されているが、バラクタ・ダイオード
の容量値が一定量変化したときのバラクタ装荷誘電体共
振器の共振周波数の変化を見ると、バラクタ回路が高次
のモードで共振している場合よシも低次のモードで共振
している場合のほうが変化量は大きい。すなわち、長さ
の和が２分の１波長のときが一番変化量が大きく、次に
２分の１波長の２倍のとき、その次に２分の１波長の３
倍のときという順序になる。したがって、条件（１）だ
けを考えれば、長さは２分の１波長が最もよいことにな
る。ところが、マイクロ・ストリップ線路の全長が２分
の１波長の場合、電流最大の位置はマイクロ・ストリッ
プ線路中央の位置ただ一箇所だけであシ、その点にバラ
クタ・ダイオードを挿入し、かつ、誘電体共振器を接近
させて大きな結合度を実現することは、実装上物理的に
不可能である。そこで、条件（４）が必要となってくる
。バラクタ・ダイオードの挿入位置と誘電体共振器の結
合位置を２分の１波長間隔だけ場所的に分離するという
本発明の構成によって、条件（１）を満足しつつ、誘電
体共振器との間の大きな結合度を実現することが可能と
なるのである。In condition (1), in order to bring the varactor circuit into a resonant state, the sum of the lengths of the first microstrip line and the second microstrip line is required to be an integral multiple of a half wavelength. However, when we look at the change in the resonant frequency of the varactor-loaded dielectric resonator when the capacitance value of the varactor diode changes by a certain amount, we find that it is lower than when the varactor circuit is resonating in a higher-order mode. The amount of change is larger when resonance occurs in the next mode. In other words, the amount of change is largest when the sum of the lengths is 1/2 wavelength, then when it is twice the 1/2 wavelength, and then 3 times the 1/2 wavelength.
The order is when the number is doubled. Therefore, considering only condition (1), the best length is 1/2 wavelength. However, when the total length of the microstrip line is 1/2 wavelength, the maximum current is only at one point, the center of the microstrip line, and a varactor diode is inserted at that point, and a dielectric In terms of implementation, it is physically impossible to achieve a large degree of coupling by bringing the body resonators close together. Therefore, condition (4) becomes necessary. By the configuration of the present invention in which the insertion position of the varactor diode and the coupling position of the dielectric resonator are separated by a half wavelength interval, the distance between the insertion position of the varactor diode and the dielectric resonator can be improved while satisfying condition (1). This makes it possible to achieve a high degree of coupling.
これらによシ、条件（１）から（４）までの４条件が同
時に満足されることになる。Accordingly, the four conditions (1) to (4) are satisfied at the same time.
なお、バラクタ・ダイオードの極性は、高周波的には単
にキャパシタとして作動させているだけなので、方向は
どちらでもよく、制御電圧の極性と合せればよい。Note that the polarity of the varactor diode does not matter in either direction since it simply operates as a capacitor in terms of high frequency, as long as it matches the polarity of the control voltage.
次に、請求項２記載の発明の実施例について説明する。Next, an embodiment of the invention according to claim 2 will be described.
本発明の目的は、制御電圧に対する発振周波数の変化範
囲が大きくとれ、制御特性の線形性も良い電圧制御型発
振器を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a voltage-controlled oscillator that has a wide variation range of oscillation frequency with respect to a control voltage and has good linearity of control characteristics.
第２図は本発明の電圧制御型発振器の一実施例を示す構
成図である。第２図において、１１はＧａＡｓ−ＦＩＣ
Ｔ、 １２はマイクロ・ストリップ線路、１３は終端回
路、１４は原発振器である。原発振器１４の構成は、能
動素子としてＧａＡｓ−ＦＩＣＴ １１を用い、ドレイ
ン端子１１１は略４分の１波長の先端開放のマイクロ・
ストリップ線路に接続し、ゲート端子１１２は先端を終
端回路１３で終端したマイクロ・ストリップ線路に接続
し、ソース端子１１３は出力数シ出しのマイクロ・スト
リップ線路に接続したものである。ゲート端子１１２に
接続されたマイクロ・ストリップ線路と誘電体共振器１
０を磁界結合させることによって、バラクタ装荷誘電体
共振器と結合させ、周波数安定化をはかる。この電圧制
御型発振器の発振周波数は、原発振器の発振条件からは
ずれないかぎりは、バラクタ装荷誘電体共振器の共振周
波数で決定されるので、制御電圧に対する発振周波数の
変化範囲が大きくとれ、制御特性の線形性も良い電圧制
御型発振器を実現できる。FIG. 2 is a block diagram showing an embodiment of the voltage controlled oscillator of the present invention. In FIG. 2, 11 is a GaAs-FIC
T, 12 is a microstrip line, 13 is a termination circuit, and 14 is an original oscillator. The configuration of the original oscillator 14 uses GaAs-FICT 11 as an active element, and the drain terminal 111 is an open-ended micrometer with approximately a quarter wavelength.
The gate terminal 112 is connected to a microstrip line whose tip end is terminated with a termination circuit 13, and the source terminal 113 is connected to a microstrip line with several outputs. Microstrip line and dielectric resonator 1 connected to gate terminal 112
By magnetically coupling 0 with a varactor-loaded dielectric resonator, frequency stabilization is achieved. The oscillation frequency of this voltage-controlled oscillator is determined by the resonant frequency of the varactor-loaded dielectric resonator as long as it does not deviate from the oscillation conditions of the original oscillator, so the oscillation frequency can have a wide variation range with respect to the control voltage, and the control characteristics A voltage-controlled oscillator with good linearity can be realized.
発明の効果
以上のように本発明は、バラクタ・ダイオードの第一の
端子は使用周波数の略４分の３波長の長さを持つ先端開
放の第一のマイクロ・ストリップ線路に接続し、バラク
タ・ダイオードの第二の端子は略４分の１波長の長さを
持つ先端開放の第二のマイクロ・ストリップ線路に接続
し、誘電体共振器との結合は第一のマイクロ・ス） Ｉ
Ｊツブ線路の開放端から略４分の１波長の位置で磁界結
合させることにより、制御電圧に対する共振周波数の変
化範囲が大きくとれ、制御特性の線形性も良いバラクタ
装荷誘電体共振器を実現できる。Effects of the Invention As described above, in the present invention, the first terminal of the varactor diode is connected to the first open-ended microstrip line having a length of approximately three-quarters of the wavelength of the operating frequency, and the varactor diode is The second terminal of the diode is connected to a second open-ended microstrip line with a length of about a quarter wavelength, and the coupling with the dielectric resonator is connected to the first microstrip line.
By magnetically coupling at a position approximately 1/4 wavelength from the open end of the J-tube line, it is possible to achieve a varactor-loaded dielectric resonator with a wide variation range of resonant frequency with respect to control voltage and good linearity of control characteristics. .
第１図は本発明の一実施例におけるバラクタ装荷誘電体
共振器の構成図、第２図は本発明の一実施例における電
圧制御型発振器の構成図、第３図は従来のバラクタ装荷
誘電体共振器の構成図である。
１・・・・・・使用周波数の略４分の３波長の長さを持
つ先端開放の第一のマイクロ・ストリップ線路、２・・
・・使用周波数の略４分の１波長の長さを持つ先端開放
の第二のマイクロ・ス） ＩＪツブ線路、５・・・・・
・誘電体基板、６・・・・・・バラクタ・ダイオード、
了・・・・・・高周波チョーク回路、８・・・・・電圧
制御端子、９・・・・・・誘電体共振器、１０・・・・
・・結合点、１１・・・・・・ＧａＡｓ−ＦＥＴ、１４
・・中原発振器。FIG. 1 is a block diagram of a varactor-loaded dielectric resonator according to an embodiment of the present invention, FIG. 2 is a block diagram of a voltage-controlled oscillator according to an embodiment of the present invention, and FIG. 3 is a block diagram of a conventional varactor-loaded dielectric resonator. FIG. 3 is a configuration diagram of a resonator. 1... First micro strip line with an open end having a length of approximately three-quarters of the wavelength of the frequency used, 2...
・Second open-ended microscopy with a length of approximately 1/4 wavelength of the frequency used) IJ tube line, 5...
・Dielectric substrate, 6... Varactor diode,
End...High frequency choke circuit, 8...Voltage control terminal, 9...Dielectric resonator, 10...
...Coupling point, 11...GaAs-FET, 14
...Nakahara oscillator.
Claims (2)
、前記バラクタ・ダイオードの第一の端子は使用周波数
の略４分の３波長の長さを持つ先端開放の第一のマイク
ロ・ストリップ線路に接続し、前記バラクタ・ダイオー
ドの第二の端子は使用周波数の略４分の１波長の長さを
持つ先端開放の第二のマイクロ・ストリップ線路に接続
し、前記誘電体共振器との結合は前記第一のマイクロ・
ストリップ線路の開放端から略４分の１波長の位置で磁
界結合させたことを特徴とするバラクタ装荷誘電体共振
器。(1) A varactor diode and a dielectric resonator are provided, and the first terminal of the varactor diode is connected to a first open-ended microstrip line having a length of approximately three-quarters of the wavelength of the operating frequency. The second terminal of the varactor diode is connected to a second open-ended microstrip line having a length of about a quarter wavelength of the operating frequency, and the coupling with the dielectric resonator is Said first micro-
A varactor-loaded dielectric resonator characterized by magnetic field coupling at a position approximately 1/4 wavelength from the open end of a strip line.
バラクタ装荷誘電体共振器よりなることを特徴とする電
圧制御型発振器。(2) A voltage-controlled oscillator comprising an original oscillator having an active element and the varactor-loaded dielectric resonator according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1389588A JPH0793535B2 (en) | 1988-01-25 | 1988-01-25 | Varactor-loaded dielectric resonator and voltage-controlled oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1389588A JPH0793535B2 (en) | 1988-01-25 | 1988-01-25 | Varactor-loaded dielectric resonator and voltage-controlled oscillator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01190008A true JPH01190008A (en) | 1989-07-31 |
| JPH0793535B2 JPH0793535B2 (en) | 1995-10-09 |
Family
ID=11845914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1389588A Expired - Fee Related JPH0793535B2 (en) | 1988-01-25 | 1988-01-25 | Varactor-loaded dielectric resonator and voltage-controlled oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793535B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5475350A (en) * | 1992-09-29 | 1995-12-12 | Matsushita Electric Industrial Co., Ltd. | Frequency tunable resonator including a varactor |
-
1988
- 1988-01-25 JP JP1389588A patent/JPH0793535B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5475350A (en) * | 1992-09-29 | 1995-12-12 | Matsushita Electric Industrial Co., Ltd. | Frequency tunable resonator including a varactor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0793535B2 (en) | 1995-10-09 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |