GB1349901A - Wave energy direction finding systems - Google Patents
Wave energy direction finding systemsInfo
- Publication number
- GB1349901A GB1349901A GB1349901DA GB1349901A GB 1349901 A GB1349901 A GB 1349901A GB 1349901D A GB1349901D A GB 1349901DA GB 1349901 A GB1349901 A GB 1349901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- aerial
- energy direction
- aerials
- lines
- 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.)
- Expired
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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
1349901 Wave - energy direction - finding LITTON SYSTEMS Inc 18 March 1971 7225/71 Heading H4D In a digital wave-energy direction-finder, particularly for radio waves, the sum and difference of the outputs of two aerials 10, 11 (or equivalent sound wave or light wave transducers) are formed in lines 35, 36, the output of one aerial, e.g. 10, is phase advanced and retarded by equal amounts and the sum taken as shown with the output of the other aerial, and comparators 43, 44 give respective binary one or zero depending on whether the signal on line 35 is greater or less than that on line 36 and similarly for lines 37, 38. More spaced pairs of aerials may be added to increase bearing resolution, Figs. 8 to 12 (none shown); or one aerial pair with frequency multiplication may be utilized to afford an equivalent result, Fig. 15 (not shown). Compensation for differing wave frequencies is described, Figs. 17, 18 (none shown). An elevation-determining system may be added. Modular construction may be employed for portable use.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB722571 | 1971-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1349901A true GB1349901A (en) | 1974-04-10 |
Family
ID=9829032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1349901D Expired GB1349901A (en) | 1971-03-18 | 1971-03-18 | Wave energy direction finding systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1349901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225276A (en) * | 1988-10-31 | 1990-05-30 | Tomy Co Ltd | Moulding a decorated resin plate into a decorated toy body |
-
1971
- 1971-03-18 GB GB1349901D patent/GB1349901A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225276A (en) * | 1988-10-31 | 1990-05-30 | Tomy Co Ltd | Moulding a decorated resin plate into a decorated toy body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |