GB1462227A – Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
– Google Patents
GB1462227A – Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
– Google Patents
Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
Info
Publication number
GB1462227A
GB1462227A
GB1699874A
GB1699874A
GB1462227A
GB 1462227 A
GB1462227 A
GB 1462227A
GB 1699874 A
GB1699874 A
GB 1699874A
GB 1699874 A
GB1699874 A
GB 1699874A
GB 1462227 A
GB1462227 A
GB 1462227A
Authority
GB
United Kingdom
Prior art keywords
phase
signal
khz
give
receiver
Prior art date
1974-04-18
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
GB1699874A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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.)
1974-04-18
Filing date
1974-04-18
Publication date
1977-01-19
1974-04-18
Application filed by Standard Telephone and Cables PLC
filed
Critical
Standard Telephone and Cables PLC
1974-04-18
Priority to GB1699874A
priority
Critical
patent/GB1462227A/en
1977-01-19
Publication of GB1462227A
publication
Critical
patent/GB1462227A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
G01S13/84—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted for distance determination by phase measurement
Abstract
1462227 Radio distance measurement STANDARD TELEPHONES & CABLES Ltd 18 April 1974 16998/74 Heading H4D A distance measuring system includes; in an aircraft, a standard transmitter/receiver assembly 10, the transmission being sinusoidally a.m. modulated (e.g. at 3 kHz) and periodically keyed to give 100 m.sec. bursts; at a ground transponder, a receiver demodulator 20a, a phase locking 3 kHz oscillator 21 producing a C.W. signal, phased with the received modulation and a transmitter 20b replying to the aircraft with a 3 kHz a.m. modulated signal, said signal being received at the aircraft and phase modulated at 13 to give a signal which, after amplitude detection in the receiver 106, is periodically sampled and detected (e.g. every 10 m.sec.) at 14, to give a control signal for a phase shifter 12. This receiver, via ai calibrating phase shifter 17, the 3 kHz modulating signal, to give a phase shifted signal which is further phase reversed every 10 m.sec. in synchronism with the sampling at 14, before being applied as the modulating signal to phase modulator 13. The output of receiver 10b is thus a 3 kHz carrier, phase modulated by a 3 kHz signal, phase reversing every 10 m.sec. If, as desired for the distance between the aircraft and ground, the two 3 kHz signals are in phase quadrature, alternating in their lead/lag relationship, the amplitude of the signal at the output of receiver 10b will remain constant, detector 14 will give zero output and phase shifter 12 will not be adjusted. Otherwise said amplitude will vary with a p.r.p. of 10 m.sec., and phase shifter 12 will be adjusted by the detector’s output to produce the phase quadrature relationship. The value of phase shifter 12 is then indicative of the distance. Calibrating phase shifter 17 is used to give a zero distance result when the aircraft is at a nominal zero distance from ground.
GB1699874A
1974-04-18
1974-04-18
Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
Expired
GB1462227A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB1699874A
GB1462227A
(en)
1974-04-18
1974-04-18
Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB1699874A
GB1462227A
(en)
1974-04-18
1974-04-18
Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
Publications (1)
Publication Number
Publication Date
GB1462227A
true
GB1462227A
(en)
1977-01-19
Family
ID=10087396
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1699874A
Expired
GB1462227A
(en)
1974-04-18
1974-04-18
Distance measuring equipment a-branched aliphatic monocarboxylic acids and their preparation
Country Status (1)
Country
Link
GB
(1)
GB1462227A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US6414626B1
(en)
*
1999-08-20
2002-07-02
Micron Technology, Inc.
Interrogators, wireless communication systems, methods of operating an interrogator, methods of operating a wireless communication system, and methods of determining range of a remote communication device
1974
1974-04-18
GB
GB1699874A
patent/GB1462227A/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US6414626B1
(en)
*
1999-08-20
2002-07-02
Micron Technology, Inc.
Interrogators, wireless communication systems, methods of operating an interrogator, methods of operating a wireless communication system, and methods of determining range of a remote communication device
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Legal Events
Date
Code
Title
Description
1977-06-01
PS
Patent sealed
1980-12-03
PCNP
Patent ceased through non-payment of renewal fee
