JPS5728270A - Direction finder - Google Patents
Direction finderInfo
- Publication number
- JPS5728270A JPS5728270A JP10296680A JP10296680A JPS5728270A JP S5728270 A JPS5728270 A JP S5728270A JP 10296680 A JP10296680 A JP 10296680A JP 10296680 A JP10296680 A JP 10296680A JP S5728270 A JPS5728270 A JP S5728270A
- Authority
- JP
- Japan
- Prior art keywords
- period
- receiving
- synchronous detector
- measuring device
- antenna
- 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
-
- 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
- G01S3/66—Narrow-beam systems producing in the receiver a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver; Overlapping broad-beam systems defining in the receiver a narrow zone and producing a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver
- G01S3/68—Narrow-beam systems producing in the receiver a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver; Overlapping broad-beam systems defining in the receiver a narrow zone and producing a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver wherein the timing of the pulse-type envelope signal is indicated by cathode-ray tube
Abstract
PURPOSE:To enable the accurate direction finding to be readily performed by detecting the variation period of the receiving radiowave which varies periodically, and measuring the direction of the arriving radiowave in synchronization with said period. CONSTITUTION:A receiving antenna 5 which is driven by a rotating device 4 is connected to a receiver 3. The output of the receiver 3 is connected to a measuring device 6 and a synchronous detector 7. When a transmitting antenna 2 is stationary, the receiving electric field is steady and the direction can be readily found. However, when the antenna 2 begins to rotate, the field intensity periodically varies as shown in the Figure. The synchronous detector 7 stops the direction finding operation of the measuring device 6 by a DC voltage b, and detects a period S, time t when the maximum signal E appears during said period, and a time length W of E. Then, the synchronous detector 7 offsets the DC voltage b, controls the measuring device 6 via a synchronization control device 8, and makes the receiving device 6 perform the direction measurement at the time t for the time length W, repeatedly. In this way, erroneous measurement due to side lobe is avoided, and the accurate direction measurement can be performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296680A JPS5728270A (en) | 1980-07-25 | 1980-07-25 | Direction finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10296680A JPS5728270A (en) | 1980-07-25 | 1980-07-25 | Direction finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5728270A true JPS5728270A (en) | 1982-02-15 |
Family
ID=14341514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10296680A Pending JPS5728270A (en) | 1980-07-25 | 1980-07-25 | Direction finder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5728270A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100882351B1 (en) | 2007-03-14 | 2009-02-12 | 한국전자통신연구원 | Apparatus and Method for tracing position and direction of radio frequency transceiver |
| JP2013137277A (en) * | 2011-12-28 | 2013-07-11 | Mitsubishi Electric Corp | Azimuth measuring device |
| EP3121616A1 (en) * | 2015-07-22 | 2017-01-25 | Rohde & Schwarz GmbH & Co. KG | Positioning device and positioning method |
-
1980
- 1980-07-25 JP JP10296680A patent/JPS5728270A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100882351B1 (en) | 2007-03-14 | 2009-02-12 | 한국전자통신연구원 | Apparatus and Method for tracing position and direction of radio frequency transceiver |
| US7724191B2 (en) | 2007-03-14 | 2010-05-25 | Electronics And Telecommunications Research Institute | Apparatus and method for tracing position and direction of target object through RF signal |
| JP2013137277A (en) * | 2011-12-28 | 2013-07-11 | Mitsubishi Electric Corp | Azimuth measuring device |
| EP3121616A1 (en) * | 2015-07-22 | 2017-01-25 | Rohde & Schwarz GmbH & Co. KG | Positioning device and positioning method |
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