GB581687A - Improvements in signalling by means of very short electrical waves - Google Patents

Improvements in signalling by means of very short electrical waves

Info

Publication number
GB581687A
GB581687A GB1681841A GB1681841A GB581687A GB 581687 A GB581687 A GB 581687A GB 1681841 A GB1681841 A GB 1681841A GB 1681841 A GB1681841 A GB 1681841A GB 581687 A GB581687 A GB 581687A
Authority
GB
United Kingdom
Prior art keywords
aerials
signalling
different
feet
transmitter
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
Application number
GB1681841A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1681841A priority Critical patent/GB581687A/en
Publication of GB581687A publication Critical patent/GB581687A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity

Abstract

581,687. Wireless signalling. GENERAL ELECTRIC CO., Ltd., and WILLSHAW, W. E. Dec. 31, 1941, No. 16818. [Class 40 (v)] A short-wave system for use in signalling over a plane surface, e.g. the sea, employs at the transmitter and the receiver a plurality of aerials located at different heights and operating with different plane of polarization, but with the same wave-length ; the heights being so adjusted that interference minima due to reflection at the plane surface lie at different distances from the transmitter for waves polarized in different planes. When a station is adapted both for transmission and reception, either the same or separate aerials may be used. The receiving aerials may feed receiving circuits which are separate as far as the final rectifier. The system may operate on 7 c.m. waves, with a vertical aerial located at a height of 50 feet and a horizontal aerial at 60 feet.
GB1681841A 1941-12-31 1941-12-31 Improvements in signalling by means of very short electrical waves Expired GB581687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1681841A GB581687A (en) 1941-12-31 1941-12-31 Improvements in signalling by means of very short electrical waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1681841A GB581687A (en) 1941-12-31 1941-12-31 Improvements in signalling by means of very short electrical waves

Publications (1)

Publication Number Publication Date
GB581687A true GB581687A (en) 1946-10-22

Family

ID=10084221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1681841A Expired GB581687A (en) 1941-12-31 1941-12-31 Improvements in signalling by means of very short electrical waves

Country Status (1)

Country Link
GB (1) GB581687A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660718A (en) * 1949-12-30 1953-11-24 Gen Electric Microwave protective system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660718A (en) * 1949-12-30 1953-11-24 Gen Electric Microwave protective system

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