JPS6484902A - Directional coupler - Google Patents
Directional couplerInfo
- Publication number
- JPS6484902A JPS6484902A JP24115887A JP24115887A JPS6484902A JP S6484902 A JPS6484902 A JP S6484902A JP 24115887 A JP24115887 A JP 24115887A JP 24115887 A JP24115887 A JP 24115887A JP S6484902 A JPS6484902 A JP S6484902A
- Authority
- JP
- Japan
- Prior art keywords
- circuits
- characteristic
- capacitors
- length
- theta
- 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
Landscapes
- Waveguides (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To miniaturize the device without causing the deterioration in a characteristic by making the length of four transmission lines shorter than 1/4 wavelength in a use frequency, and also, connecting a capacitor to a connecting point of the transmission line. CONSTITUTION:Transmission lines 1-4 are connected annularly, and by connecting input/output transmission lines 5-8 and capacitors 21-24 to each connecting point, a circuit is formed. When length of the transmission circuits 1-4 is 1/4 of a use frequency, when the capacitors 21-24 are connected, electrical length of the circuits 1-4 is varied in accordance with its capacity. When the electrical length of the circuits 1-4 is theta, the respective characteristic admittances become sin theta times, and become small by connecting the capacitors 21-24. The capacity C of the capacitor is shown by the equation. In this regard, Ya and Yb are characteristic admittances of the circuits 1, 2 and the circuits 3, 4, respectively. From a result of the equation, the electrical length theta is derived, the transmission line is shortened consequently, the device is miniaturized without deteriorating the characteristic, and the design accuracy is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24115887A JP2514377B2 (en) | 1987-09-26 | 1987-09-26 | Directional coupler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24115887A JP2514377B2 (en) | 1987-09-26 | 1987-09-26 | Directional coupler |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6484902A true JPS6484902A (en) | 1989-03-30 |
JP2514377B2 JP2514377B2 (en) | 1996-07-10 |
Family
ID=17070125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24115887A Expired - Lifetime JP2514377B2 (en) | 1987-09-26 | 1987-09-26 | Directional coupler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2514377B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04505532A (en) * | 1989-06-02 | 1992-09-24 | モトローラ・インコーポレーテッド | Capacitively compensated microstrip directional coupler |
US5304961A (en) * | 1992-03-30 | 1994-04-19 | Motorola, Inc. | Impedance transforming directional coupler |
-
1987
- 1987-09-26 JP JP24115887A patent/JP2514377B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04505532A (en) * | 1989-06-02 | 1992-09-24 | モトローラ・インコーポレーテッド | Capacitively compensated microstrip directional coupler |
US5304961A (en) * | 1992-03-30 | 1994-04-19 | Motorola, Inc. | Impedance transforming directional coupler |
Also Published As
Publication number | Publication date |
---|---|
JP2514377B2 (en) | 1996-07-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20080430 |