GB1136571A - Creation of Inventions and Patents with Artificial Intelligence

GB1136571A – Improvements in electromagnetic detection systems
– Google Patents

GB1136571A – Improvements in electromagnetic detection systems
– Google Patents
Improvements in electromagnetic detection systems

Info

Publication number
GB1136571A

GB1136571A
GB35566A
GB35566A
GB1136571A
GB 1136571 A
GB1136571 A
GB 1136571A
GB 35566 A
GB35566 A
GB 35566A
GB 35566 A
GB35566 A
GB 35566A
GB 1136571 A
GB1136571 A
GB 1136571A
Authority
GB
United Kingdom
Prior art keywords
demodulator
code
phase
transmitter
fed
Prior art date
1965-01-08
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
GB35566A
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.)

Compagnie Francaise Thomson Houston SA

Original Assignee
Compagnie Francaise Thomson Houston SA
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.)
1965-01-08
Filing date
1966-01-04
Publication date
1968-12-11

1966-01-04
Application filed by Compagnie Francaise Thomson Houston SA
filed
Critical
Compagnie Francaise Thomson Houston SA

1968-12-11
Publication of GB1136571A
publication
Critical
patent/GB1136571A/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

G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems

G01S13/50—Systems of measurement based on relative movement of target

G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds

G01S13/536—Discriminating between fixed and moving objects or between objects moving at different speeds using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves

G—PHYSICS

G01—MEASURING; TESTING

G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems

G01S13/06—Systems determining position data of a target

G01S13/08—Systems for measuring distance only

G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated

G01S13/325—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of coded signals, e.g. P.S.K. signals

G—PHYSICS

G01—MEASURING; TESTING

G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems

G01S13/50—Systems of measurement based on relative movement of target

G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems

G01S13/583—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets

G01S13/584—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements

G—PHYSICS

G01—MEASURING; TESTING

G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar

Abstract

1,136,571. Radar. COMPAGNIE FRANCAISE THOMSON HOUSTON – HOTCHKISS BRANDT. 4 Jan., 1966 [8 Jan., 1965], No. 355/66. Heading H4D. In a ranging and velocity-measuring radar a transmitter is phase modulated by a coding signal and the coding signal consists of a symmetrical square wave (“course”) code g(o), and a disconnectable pseudo-random (“fine”), code F(o) generated by respective units 30, 31; the receiver includes a demodulator 6 fed from a multiplier connected to the coarse code generator and a delayed output, disconnectable in conjunction with the above disconnection, of the fine code generator, and the receiver also includes a demodulator 7 fed via a frequency doubler 5 with the coarse code; the final demodulated signal is fed via a lowfrequency amplifier 8 to audible and/or visual display means; and the transmitter and receiver have a common orientable aerial 10. The fine code generator is a shift register Fig. 2 (c) (not shown), and the coarse code produces 0 or 180 degrees R.F. carrier phase shift, the period of the coarse code square wave being four times that corresponding to maximum range. The transmitter incorporates a three-port circulator and a diode switch shunting a guide forming one of the circulator arms: when the diode is rendered conductive the R.F. phase is shifted by 180 degrees, Fig. 4 (not shown). In the R.F. “head” the echo signal is fed together with a counterpart of the unmodulated transmitter carrier to a coherent phase demodulator and the video output therefrom is fed to demodulator 6, which consists of a multiplier and band-pass filter, to give a sine wave of amplitude varying as where R is target range and R max is maximum range, and of phase proportional to R/2R max ; the demodulator 7 consists of a multiplier and a Doppler-shift filter, Fig. 5 (not shown). A frequency meter 9, 91 gives target velocity which alternatively may be judged audibly from loudspeaker 112. The signal is a maximum when the delay-tapping 323 corresponds to target range. It is stated that the demodulation arrangement compensates for the attenuation of echo signal with distance. In operation the area is first surveyed by opening switches 321, 322 and a target presence is detected by its Doppler frequency; switches 321, 322 are then closed and selector 323 operated for maximum audible or visual output to afford range.

GB35566A
1965-01-08
1966-01-04
Improvements in electromagnetic detection systems

Expired

GB1136571A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

FR1235A

FR1447998A
(en)

1965-01-08
1965-01-08

Improvements to electromagnetic detection equipment

Publications (1)

Publication Number
Publication Date

GB1136571A
true

GB1136571A
(en)

1968-12-11

Family
ID=8567575
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB35566A
Expired

GB1136571A
(en)

1965-01-08
1966-01-04
Improvements in electromagnetic detection systems

Country Status (6)

Country
Link

AT
(1)

AT269228B
(en)

DE
(1)

DE1279130B
(en)

FR
(1)

FR1447998A
(en)

GB
(1)

GB1136571A
(en)

IL
(1)

IL24939A
(en)

SE
(1)

SE323113B
(en)

Cited By (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US5115247A
(en)

1988-02-16
1992-05-19
Honeywell Inc.
Frequency modulated, phase coded radar

GB2265061A
(en)

1992-03-06
1993-09-15
Marconi Gec Ltd
Radar

CN113302459A
(en)

2019-01-18
2021-08-24
福洛创尼科股份公司
Non-invasive open channel flow meter

Families Citing this family (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3614785A
(en)

1969-03-28
1971-10-19
Rca Corp
Doppler correlation radar system

Family Cites Families (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

FR1285956A
(en)

1961-01-16
1962-03-02
Sfim

Radio-electric tracking, warning and telemetry device

1965

1965-01-08
FR
FR1235A
patent/FR1447998A/en
not_active
Expired

1965-12-30
DE
DE1965C0037810
patent/DE1279130B/en
active
Pending

1966

1966-01-04
GB
GB35566A
patent/GB1136571A/en
not_active
Expired

1966-01-04
SE
SE13866A
patent/SE323113B/xx
unknown

1966-01-05
AT
AT8166A
patent/AT269228B/en
active

1966-01-07
IL
IL2493966A
patent/IL24939A/en
unknown

Cited By (5)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US5115247A
(en)

1988-02-16
1992-05-19
Honeywell Inc.
Frequency modulated, phase coded radar

GB2265061A
(en)

1992-03-06
1993-09-15
Marconi Gec Ltd
Radar

AU656656B2
(en)

1992-03-06
1995-02-09
Gec-Marconi Limited
Radar apparatus and method

GB2265061B
(en)

1992-03-06
1995-11-22
Marconi Gec Ltd
Radar apparatus and method

CN113302459A
(en)

2019-01-18
2021-08-24
福洛创尼科股份公司
Non-invasive open channel flow meter

Also Published As

Publication number
Publication date

SE323113B
(en)

1970-04-27

IL24939A
(en)

1970-05-21

AT269228B
(en)

1969-03-10

FR1447998A
(en)

1966-08-05

DE1279130B
(en)

1968-10-03

Contact information