GB581762A - Improvements relating to directional propagation and reception of electromagnetic waves - Google Patents
Improvements relating to directional propagation and reception of electromagnetic wavesInfo
- Publication number
- GB581762A GB581762A GB8762/41A GB876241A GB581762A GB 581762 A GB581762 A GB 581762A GB 8762/41 A GB8762/41 A GB 8762/41A GB 876241 A GB876241 A GB 876241A GB 581762 A GB581762 A GB 581762A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guide
- guides
- wave
- energy
- energized
- 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)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
581,762. Directive radio signalling. LELAND STANFORD JUNIOR UNIVERSITY, BOARD OF TRUSTEES OF. July 10, 1941, No. 8762. Convention date, July 10, 1940. [Class 40 (v)] Apparatus for directional transmission or reception of electromagnetic waves comprises a wave guide or radiating resonator having a number of angularly-disposed branches with slots or apertures or other means for interchanging energy between its interior and its exterior. Two or more of such combined resonators may be arranged side by side to increase the directivity, as in a broadside array of radiating antennµ. The apparatus may be given a scanning movement as in radiolocation. Fig. 1, which illustrates the principle of the invention, shows a wave guide producing a conical wave front, the guide 1 being energized by a doublet 3 and perforated at 5 to allow energy to radiate into the surrounding space, the guide being several wave-lengths long and having several perforations within a wavelength. Fig. 2 shows two guides 31, 31<1> energized in phase by doublets 3, 3<1> and perforated as shown, thereby producing a fanshaped beam which is flat in the plane of the paper and fan-shaped in the plane at right angles thereto. The perforations or the width of the slot may vary as a function of the distance along the guide, to determine the directivity. Any energy which reaches the ends of the guides may be absorbed at 9, and the guide may have a longitudinal fin extending radially inwardly to prevent rotation of the plane of polarization. Fig. 10 shows apparatus for radiolocation comprising two rectangular guides 41, 41<1> energized in phase by a quarter-wave antenna 44 and mounted so that they may be moved in azimuth and elevation by motors 42, 43. The slots 15, 15<1> are formed between ground plates 35, 35<1> which are extensions of the guide proper. The angle between the guides may be adjusted by rod 11 and energy reaching the end of the guides may be absorbed by carbon plates 19 and reflected by plates 33.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US581762XA | 1940-07-10 | 1940-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB581762A true GB581762A (en) | 1946-10-24 |
Family
ID=22015158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8762/41A Expired GB581762A (en) | 1940-07-10 | 1941-07-10 | Improvements relating to directional propagation and reception of electromagnetic waves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB581762A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2130802A (en) * | 1982-10-28 | 1984-06-06 | Sony Corp | Antenna apparatus |
-
1941
- 1941-07-10 GB GB8762/41A patent/GB581762A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2130802A (en) * | 1982-10-28 | 1984-06-06 | Sony Corp | Antenna apparatus |
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