ZA71950B - Wireless telecommunication system for use in confined spaces - Google Patents
Wireless telecommunication system for use in confined spacesInfo
- Publication number
- ZA71950B ZA71950B ZA710950A ZA71950A ZA71950B ZA 71950 B ZA71950 B ZA 71950B ZA 710950 A ZA710950 A ZA 710950A ZA 71950 A ZA71950 A ZA 71950A ZA 71950 B ZA71950 B ZA 71950B
- Authority
- ZA
- South Africa
- Prior art keywords
- telecommunication system
- wireless telecommunication
- confined spaces
- confined
- spaces
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/04—Adaptation for subterranean or subaqueous use
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
- G06G7/1928—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions for forming correlation integrals; for forming convolution integrals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/203—Leaky coaxial lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/28—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/28—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium using the near field of leaky cables, e.g. of leaky coaxial cables
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
- Communication Cables (AREA)
- Waveguide Aerials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE85381 | 1970-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA71950B true ZA71950B (en) | 1971-12-29 |
Family
ID=3841321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA710950A ZA71950B (en) | 1970-02-18 | 1971-02-15 | Wireless telecommunication system for use in confined spaces |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS553855B1 (en) |
BE (1) | BE746177A (en) |
CA (1) | CA931238A (en) |
DE (1) | DE2104467C3 (en) |
FR (1) | FR2080581B1 (en) |
GB (1) | GB1327864A (en) |
LU (1) | LU62476A1 (en) |
NL (1) | NL149047B (en) |
ZA (1) | ZA71950B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE834291A (en) * | 1975-10-07 | 1976-02-02 | RADIOCOMMUNICATIONS SYSTEM FOR CONFINED AREAS | |
DE3004882A1 (en) * | 1980-02-09 | 1981-08-20 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | RADIANT COAXIAL HIGH FREQUENCY CABLE |
GB2212985A (en) * | 1987-12-01 | 1989-08-02 | Alison Microsystems Limited | Slotted antenna |
GB2235336B (en) * | 1989-06-23 | 1994-05-11 | Hunting Eng Ltd | Communication via leaky cables |
FR2659512B1 (en) * | 1990-03-09 | 1994-04-29 | Cogema | MICROWAVE COMMUNICATION FACILITY. |
GB2415544B (en) * | 2004-06-25 | 2006-11-29 | Motorola Inc | RF communication device and method of using it and antenna and antenna construction for use in the device and method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2455224A (en) * | 1944-06-16 | 1948-11-30 | Buchwalter Louise | Antenna |
US3364489A (en) * | 1964-09-17 | 1968-01-16 | Melpar Inc | Traveling wave antenna having radiator elements with doubly periodic spacing |
-
1970
- 1970-02-18 BE BE746177D patent/BE746177A/en not_active IP Right Cessation
-
1971
- 1971-01-05 FR FR7100142A patent/FR2080581B1/fr not_active Expired
- 1971-01-22 LU LU62476D patent/LU62476A1/xx unknown
- 1971-01-29 CA CA104079A patent/CA931238A/en not_active Expired
- 1971-02-01 DE DE2104467A patent/DE2104467C3/en not_active Expired
- 1971-02-15 ZA ZA710950A patent/ZA71950B/en unknown
- 1971-02-15 NL NL717101966A patent/NL149047B/en not_active IP Right Cessation
- 1971-02-18 JP JP731471A patent/JPS553855B1/ja active Pending
- 1971-04-19 GB GB2198071A patent/GB1327864A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1327864A (en) | 1973-08-22 |
BE746177A (en) | 1970-08-18 |
JPS553855B1 (en) | 1980-01-28 |
DE2104467A1 (en) | 1971-08-26 |
NL7101966A (en) | 1971-08-20 |
FR2080581A1 (en) | 1971-11-19 |
LU62476A1 (en) | 1971-08-11 |
CA931238A (en) | 1973-07-31 |
DE2104467B2 (en) | 1973-04-05 |
NL149047B (en) | 1976-03-15 |
FR2080581B1 (en) | 1974-10-11 |
DE2104467C3 (en) | 1978-09-07 |
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