US5652589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
FM-CW multibeam radar apparatus
Assignee: Honda Motor Co Ltd
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Filing: 1995-11-07
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Granted: 1997-07-29
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Expires: 2015-11-07
Abstract
Abstract An FM-CW multibeam radar apparatus includes a plurality of antennas designed to serve both for beam transmission and receiving are arranged in such a manner that radiated beams overlap in part with each other. For sensing a short-distance-away target, a beam is transmitted by means of one of the antennas and a reflected beam is received by a separate adjacent one of the antennas to thereby obtain a beat signal. For sensing a long-distance-away target, one and the same beam transmitter-receiver is used. Upon sensing the short-distance-away target, the per-unit-time amount of change of the frequency of a frequency modulated transmitted signal is set to be larger than that for sensing the long-distance-away target so that a beat signal becomes higher, whereby the distance resolution is improved.
Inventors
- 👤 Hideaki Ono
- 👤 Jou Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:46
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/345; G01S13/003; G01S13/42; G01S13/87; G01S13/88; G01S13/93; G01S13/931; G01S2013/9327; G01S2013/93271
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
27 words
An FM-CW multibeam radar apparatus wherein a monostatic antenna is used in sensing a long-distance-away target and a bistatic antenna is used in sensing a short-distance-away target.
Claim 2
Dependent Claim
27 words
An FM-CW multibeam radar apparatus wherein a monostatic antenna is used in sensing a long-distance-away target and a bistatic antenna is used in sensing a short-distance-away target.
Claim 3
Dependent Claim
34 words
An FM-CW multibeam radar apparatus according to claim 1 wherein the radar apparatus includes a plurality of multichannels and a beam is scanned by switching the plurality of multichannels in a time divided fashion.
Claim 4
Dependent Claim
29 words
An FM-CW multibeam radar apparatus according to claim 1 including a switching system and wherein said monostatic antenna and said bistatic antenna are switched in a time divided fashion.
Claim 5
Dependent Claim
37 words
An FM-CW multibeam radar apparatus according to claim 3 wherein a radar system is mounted on a vehicle and timing for switching said monostatic antenna and said bistatic antenna is changed in correspondence to a vehicle speed.
Claim 6
Dependent Claim
57 words
An FM-CW multibeam radar apparatus comprising a plurality of beam transmitter-receivers which are designed to radiate beams and receive signals reflected by a target and arranged in such a manner that two adjacent beams overlap in part with each other, wherein said apparatus further comprises means for changing the sensing distance in correspondence to a vehicle speed.
Claim 7
Dependent Claim
57 words
An FM-CW multibeam radar apparatus comprising a plurality of beam transmitter-receivers which are designed to radiate beams and receive signals reflected by a target and arranged in such a manner that two adjacent beams overlap in part with each other, wherein said apparatus further comprises means for changing the sensing distance in correspondence to a vehicle speed.
Claim 8
Dependent Claim
69 words
An FM-CW multibeam radar apparatus as in claim 5 wherein the transmitter-receivers are designed to operate in monostatic and bistatic modes, and the apparatus is switched to the bistatic mode for sensing short distances to a target and switched to the monostatic mode for sensing long distances to a target, and the means for changing the sensing distance comprises switching means for switching between the monostatic and bistatic modes.
Claim 9
Dependent Claim
25 words
An FM-CW multibeam radar apparatus as in claim 6 wherein the switching between the monostatic and bistatic modes is changed in correspondence to vehicle speed.
Claim 10
Dependent Claim
107 words
An FM-CW multibeam radar apparatus comprising a plurality of beam transmitter-receivers which are designed to radiate beams and receive signals reflected by a target and arranged in such a manner that two adjacent beams overlap in part with each other for sensing short-distance and long-distance targets, wherein for sensing at least a short-distance-away target a beam is transmitted by means of one of said transmitter-receivers and a reflected beam is received by a separate adjacent one of said transmitter-receivers, and wherein the per-unit-time amount of change of the frequency of a transmitted wave for sensing the short-distance-away target is larger than that for sensing a long-distance-away target.
Claim 11
Dependent Claim
107 words
An FM-CW multibeam radar apparatus comprising a plurality of beam transmitter-receivers which are designed to radiate beams and receive signals reflected by a target and arranged in such a manner that two adjacent beams overlap in part with each other for sensing short-distance and long-distance targets, wherein for sensing at least a short-distance-away target a beam is transmitted by means of one of said transmitter-receivers and a reflected beam is received by a separate adjacent one of said transmitter-receivers, and wherein the per-unit-time amount of change of the frequency of a transmitted wave for sensing the short-distance-away target is larger than that for sensing a long-distance-away target.
Claim 12
Dependent Claim
83 words
An FM-CW multibeam radar apparatus according to claim 8 wherein the radar apparatus has a monostatic mode in which a transmitted signal and a received signal are carried out by the same transmitter-receiver and a bistatic mode in which a beam transmitted by one of two adjacent beam transmitter-receivers is received by the other one of the adjacent beam transmitter-receivers, and wherein the monostatic mode is used in sensing a long-distance-away target and a bistatic mode is used in sensing a short-distance-away target.
Claim 13
Dependent Claim
22 words
An FM-CW multibeam radar apparatus according to claim 9 wherein the monostatic and bistatic modes are switched in a time divided fashion.
Claim 14
Dependent Claim
34 words
An FM-CW multibeam radar apparatus according to claim 10 wherein the radar apparatus is mounted on a vehicle and timing for switching said monostatic and bistatic modes is changed in correspondence to vehicle speed.
Claim 15
Independent Claim
80 words
A method of sensing short distances to a target and sensing long distances to a target using a multibeam radar apparatus having transmitter-receivers including antennas for transmitting and receiving beams the method comprising providing a monostatic mode in which a beam is transmitted and received by one and the same antenna for detecting long distances to a target, and a bistatic mode in which a beam is transmitted and received by different antennas for sensing short distances to a target.
Claim 16
Independent Claim
80 words
A method of sensing short distances to a target and sensing long distances to a target using a multibeam radar apparatus having transmitter-receivers including antennas for transmitting and receiving beams the method comprising providing a monostatic mode in which a beam is transmitted and received by one and the same antenna for detecting long distances to a target, and a bistatic mode in which a beam is transmitted and received by different antennas for sensing short distances to a target.
Claim 17
Dependent Claim
22 words
A method as in claim 12 wherein switching between the monostatic and bistatic modes is changed in correspondence to a vehicle speed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-28 | 2001-01-27 | 2001-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-28 | 2005-01-27 | 2005-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-28 | 2009-01-27 | 2009-07-29 | $7700.00 | Window Closed / Lapsed |