Source: http://www.google.com/patents/US6714165?dq=6437692
Timestamp: 2016-10-28 16:33:22
Document Index: 126504936

Matched Legal Cases: ['art 50', 'art 60', 'art 50', 'art 60', 'art 70', 'art 50', 'art 60', 'art 70', 'art 60', 'art 80', 'art 70', 'art 80', 'art 70', 'art 80', 'art 50', 'art 50', 'art 60', 'art 60', 'art 60', 'art 60', 'art 50', 'art 70', 'art 70', 'art 70', 'art 70', 'art 60', 'art, 60', 'art 60', 'art 80', 'art 80', 'art 70', 'arts 50', 'arts 50', 'arts 60']

Patent US6714165 - Ka/Ku dual band feedhorn and orthomode transduce (OMT) - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA dual band, higher and lower frequency range transducer with a circular coaxial waveguide feed is described having a first junction for connection of a lower frequency range outer waveguide of the coaxial waveguide feed to at least two rectangular or ridge waveguides offset from the longitudinal axis...http://www.google.com/patents/US6714165?utm_source=gb-gplus-sharePatent US6714165 - Ka/Ku dual band feedhorn and orthomode transduce (OMT)Advanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6714165 B2Publication typeGrantApplication numberUS 10/031,960PCT numberPCT/BE2001/000091Publication dateMar 30, 2004Filing dateMay 23, 2001Priority dateMay 23, 2000Fee statusLapsedAlso published asCA2379151A1, CA2379151C, DE60136540D1, EP1158597A1, EP1287580A1, EP1287580B1, US20020175875, WO2001091226A1Publication number031960, 10031960, PCT/2001/91, PCT/BE/1/000091, PCT/BE/1/00091, PCT/BE/2001/000091, PCT/BE/2001/00091, PCT/BE1/000091, PCT/BE1/00091, PCT/BE1000091, PCT/BE100091, PCT/BE2001/000091, PCT/BE2001/00091, PCT/BE2001000091, PCT/BE200100091, US 6714165 B2, US 6714165B2, US-B2-6714165, US6714165 B2, US6714165B2InventorsGuy VerstraetenOriginal AssigneeNewtec CyExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Non-Patent Citations (1), Referenced by (32), Classifications (16), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetKa/Ku dual band feedhorn and orthomode transduce (OMT)
US 6714165 B2Abstract
What is claimed is: 1. A dual band, higher and lower frequency range transducer with a circular coaxial waveguide feed having a longitudinal axis, a first junction for connection of a lower frequency range outer waveguide of the coaxial waveguide feed to at least two rectangular or ridge waveguides offset from the longitudinal axis of the transducer, a second junction for connection of the at least two rectangular or ridge waveguides to a further lower frequency range waveguide and a third junction for connecting an inner higher frequency range waveguide of the coaxial waveguide feed to a further higher frequency range waveguide, wherein the transducer comprises at least first and second parts joined across a first plane substantially perpendicular to the longitudinal axis and including at least a portion of the further higher frequency range waveguide extending within the first plane of the join.
The transducer of the present invention allows the attachment of a higher frequency waveguide to the inner waveguide of the coaxial waveguide such that the higher frequency waveguide extends at an angle to the longitudinal axis of the transducer. The higher frequency waveguide extends at substantially 90� to the longitudinal axis of the waveguide. This distinguishes the present invention over those dual band transducers which extract both higher and lower frequency range waveguides parallel to the longitudinal direction.
FIG. 3 is a schematic longitudinal section at 45� to the vertical of an embodiment of an OMT and feed in accordance with the present invention.
FIGS. 5a to 5 f show respectively, 5 a: a cross-sectional side view taken vertically through the first part 50; 5 b: a view of the sealing face to the second part 60 looking towards the horn; 5 c: a side view; 5 d: a view of the face which is attached to the horn; 5 e: a side view; and 5 f: a cross-sectional view through the first part 50 taken along a 45� line to the vertical in FIG. 5b and passing through the centre line of the transducer.
FIGS. 6a to 6 h show respectively, 6 a: a cross-sectional side view taken vertically through the second part 60; 6 b: a view of the sealing face to the third part 70 looking towards the horn; 6 c: a side view; 6 d: a view of the face which is attached to the first part 50; 6 e; a side view; 6 f: is a cross-sectional view taken on a horizontal line in FIGS. 6b; 6 g: is a side view; and 6 h: a cross-sectional view through the second part 60 taken along a 45� line to the vertical in FIG. 6b and passing through the centre line of the transducer.
FIGS. 7a to 7 h show respectively, 7 a: a cross-sectional side view taken vertically through the third part 70; 7 b: a view of the face which is sealed to the second part 60; 7 c: a side view; 7 d: a view of the face which is attached to the fourth part 80; 7 e: a side view; 7 f: is a cross-sectional view taken on a horizontal line in FIGS. 7b; 7 g: is a side view; and 7 h: a cross-sectional view through the third part 70 taken along a 45� line to the vertical in FIG. 7b and passing through the centre line of the transducer.
FIGS. 8a to 8 f show respectively, 8 a: a cross-sectional side view taken vertically through the fourth part 80; 8 b: a view of the sealing face to the third part 70; 8 c: a side view; 8 d: a view of the face which is attached to the LNB; 8 e: a side view; and 8 f: a cross-sectional view through the fourth part 80 taken along a 45� line to the vertical in FIG. 8b and passing through the centre line of the transducer.
FIG. 5 shows the first part 50 which may be generally of quadratic section. This part 50 corresponds to the coaxial waveguide section 13 and turnstile junction 14, and also includes the first set of the bends 33. The outer surface of the tube 23 is formed by the inner surface 51. The four E-bends 33 may be formed at 90� to each other from steps 52 or may be flat (two bends at 180� for the single polarisation alternative). The feed horn section 11 (see FIG. 9) is attached sealingly onto surface 53. A first groove 54 may be arranged easily to accept a sealing ring such as a conventional “O” ring for sealing to the second part 60.
FIG. 6 shows the second part 60 which may be generally of quadratic section but may have any suitable shape. Part 60 corresponds to half of the interconnection section 15 and half of the transition 37. The inner tube 24 shown in FIG. 10 is attached to the second part 60 on side 62, for instance in a circular recess 67. The first part 50 is attached sealingly to the side 62. Four rectangular (or ridge) waveguide branches 26 are distributed at 90� intervals around the longitudinal axis 6 (two branches at 180� for the single polarisation alternative). The impedance matching device 30 may be provided by a series of steps 63 on side 62. The other major surface 61 includes a groove 64 which forms one half of the high frequency waveguide 41. The impedance matching device 39 may be provided by a step 65. A groove 66 may be provided for accepting a sealing ring, e.g. a conventional “O” ring for sealing to third part 70.
FIG. 7 shows the third part 70 which may be of generally quadratic section but the present invention is not limited thereto. This part 70 corresponds to half of the interconnection section 15 and half of the transition 37. This part 70 includes an H-plane waveguide bend 39 and a waveguide port 40. The second part 60 is attached sealingly to the side 71. Four rectangular (or ridge) waveguide branches 26 are distributed at 90� intervals around the longitudinal axis 6 (two branches at 180� for the single polarisation alternative). The branches 26 mate with the same branches in second part, 60. The impedance matching device 32 may be provided by a stud 73 and optionally a series of steps 74 on side 72. The side 71 includes a groove 75 which forms the other half of the high frequency waveguide 41 with groove 64 of second part 60. The impedance device 38 is formed by a step 76.
FIG. 8 shows the fourth part 80 which may be of generally quadratic section but the present invention is not limited thereto. This part 80 corresponds to the circular waveguide section 17 and second turnstile junction 16. It also includes the second set of four waveguide bends 33 arranged at 90� to each other (two bends at 180� for the single polarisation alternative). The outer surface of the circular waveguide 17 is formed by the inner surface 81. The four E-bends 33 may be formed from steps 82 or may be flat. The low frequency interface (LNB) is attached sealingly onto surface 83. A first groove 84 may be arranged easily to accept a sealing ring such as a conventional “O” ring for sealing to the third part 70.
All parts 50-80 and the horn 11 can be bolted together. The parts 50-80 as well as horn 11 may be made by matching, casting or a similar process. The design also allows for inclusion of sealing rings, especially rubber “O” ring seals in between the parts in order to make the OMT+feed assembly waterproof. In particular, the provision of a join plane between the second and third parts 60, 70 allows a convenient way of forming the high frequency waveguide 41 in a well-sealed manner without seals of complex geometry.
The performance results on a transducer in accordance with the present invention are summarised in tables 1 and 2. Test methods are according to internationally accepted standards such as ETSI EN 301 459 V1.2.1 (2000-10). Test made with a parabolic reflector were made using a visiostat reflector with aperture diameters of 75�75 cm (diameters of equivalent antenna aperture in plane perpendicular to parabolic axis) with a focal length of 48.75 cm, an offset angle of 39.95� (angle between bore-sight axis of feed and parabolic axis), a subtended angle of 74� (angle from focus subtended by reflector edge) and a clearance (distance between reflector edge and parabolic axis) of 2.5 cm.
Ka/Ku band feed-Horn OMT
Ku frequency band
Ka frequency band
Ka band port i/p return loss
at least 22 over frequency
Ku band port i/p return loss
at least 12 over frequency
Ka band to Ku band isolation
at least 35 over frequency
Ka band loss
≦0.2 over frequency range
Ku band loss
Ka band co-polar radiation
pattern, feed taper
≦�20 over frequency
pattern, phase error
Ku band co-polar radiation
Ka band peak cross-polar
≧18 over frequency range
Ku band peak cross-polar
≧19 over frequency range
Performance of 75 cm offset reflector antenna with Ka/Ku band feed
Ku band performance @ 11.2 GHz
(XPD) within the 1 dB contour
Off-axis antenna gain relative
at least 16 over frequency
to on-axis maximum @ 2.5�
from main beam axis
First sidelobe maximum
at least 27 over frequency
relative to on-axis maximum
@ 4� from main beam axis
Ka band performance @ 11.2 GHz
at least 20 over frequency
at least 28 over frequency
to on-axis maximum @ 1.8�
at least 17 over frequency
@ 1.3�
*these results are for plastic moulded reflector antenna with encapsulated metallic grid, slightly better results are obtained with solid aluminium reflectors While the present invention has been shown and described with reference to preferred embodiments it will be understood by those skilled in the art that various changes or modifications in form and detail may be made without departing from the scope and spirit of the invention.
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2012启碁科技股份有限公司Dual frequency feed assemblyDE102008044895A1Aug 29, 2008Mar 4, 2010Astrium GmbhSignal-Verzweigung zur Verwendung in einem KommunikationssystemEP2159870A1Aug 26, 2009Mar 3, 2010Astrium GmbHSignal branching for use in a communication system* Cited by examinerClassifications U.S. Classification343/772, 343/860, 343/776, 343/786, 343/785International ClassificationH01P1/161, H01P1/213Cooperative ClassificationH01Q5/47, H01Q13/0208, H01Q13/24, H01P1/161, H01Q13/0258, H01P1/213European ClassificationH01Q13/02E1, H01P1/213, H01P1/161Legal EventsDateCodeEventDescriptionApr 24, 2002ASAssignmentOwner name: NEWTEC CY, BELGIUMFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERSTRACTEN, GUY;REEL/FRAME:012871/0277Effective date: 20020218May 23, 2007FPAYFee paymentYear of fee payment: 4Sep 29, 2011FPAYFee paymentYear of fee payment: 8Nov 6, 2015REMIMaintenance fee reminder mailedMar 30, 2016LAPSLapse for failure to pay maintenance feesMay 17, 2016FPExpired due to failure to pay maintenance feeEffective date: 20160330RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services