JPS5729967A - Direction discriminating device for radio interference wave of direction finder - Google Patents
Direction discriminating device for radio interference wave of direction finderInfo
- Publication number
- JPS5729967A JPS5729967A JP10441180A JP10441180A JPS5729967A JP S5729967 A JPS5729967 A JP S5729967A JP 10441180 A JP10441180 A JP 10441180A JP 10441180 A JP10441180 A JP 10441180A JP S5729967 A JPS5729967 A JP S5729967A
- Authority
- JP
- Japan
- Prior art keywords
- radio interference
- waves
- radio
- interference waves
- frequency component
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/58—Rotating or oscillating beam systems using continuous analysis of received signal for determining direction in the plane of rotation or oscillation or for determining deviation from a predetermined direction in such a plane
- G01S3/60—Broad-beam systems producing in the receiver a substantially sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver, e.g. cardioid system
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
PURPOSE:To detect arrival directions of two radio waves at the same time, and to prevent an observation error which is caused by radio interference, by selecting a signal of the bent frequency, when there are plural radio interference waves. CONSTITUTION:Loop antennas 1, 2 are placed so that each directivity meets at right angles, and each output is provided to balanced modulators 3, 4. In case each of two radio interference waves has been received singly, a send-out signal from a synthesizer 6 is provided to a receiving part 10. A receiving output is detected 11, and after that, it is applied to a BPF12, a low frequency component is removed, only a bent frequency component is amplified by a tuning amplifier 13, and is provided to a CRT driving circuit 16 through a detector 14. Accordingly, two propellerlike graphite forms (p), (q) are displayed on a CRT 17, and each arrival direction of two radio interference waves, or its reverse direction is indicated by each graphic form.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10441180A JPS5926909B2 (en) | 1980-07-31 | 1980-07-31 | Interference wave direction separation device for direction finder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10441180A JPS5926909B2 (en) | 1980-07-31 | 1980-07-31 | Interference wave direction separation device for direction finder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5729967A true JPS5729967A (en) | 1982-02-18 |
JPS5926909B2 JPS5926909B2 (en) | 1984-07-02 |
Family
ID=14379956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10441180A Expired JPS5926909B2 (en) | 1980-07-31 | 1980-07-31 | Interference wave direction separation device for direction finder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5926909B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6299952U (en) * | 1985-12-12 | 1987-06-25 |
-
1980
- 1980-07-31 JP JP10441180A patent/JPS5926909B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6299952U (en) * | 1985-12-12 | 1987-06-25 |
Also Published As
Publication number | Publication date |
---|---|
JPS5926909B2 (en) | 1984-07-02 |
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