US3086181A - Coaxial line to waveguide transition - Google Patents
Coaxial line to waveguide transition Download PDFInfo
- Publication number
- US3086181A US3086181A US27299A US2729960A US3086181A US 3086181 A US3086181 A US 3086181A US 27299 A US27299 A US 27299A US 2729960 A US2729960 A US 2729960A US 3086181 A US3086181 A US 3086181A
- Authority
- US
- United States
- Prior art keywords
- waveguide
- transition
- aperture
- transmission line
- knob
- 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 - Lifetime
Links
- 230000007704 transition Effects 0.000 title claims description 41
- 239000004020 conductor Substances 0.000 claims description 39
- 230000005540 biological transmission Effects 0.000 claims description 30
- 230000004888 barrier function Effects 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000001965 increasing effect Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
- H01P5/103—Hollow-waveguide/coaxial-line transitions
Definitions
- This invention relates to transmission :line transition units for coupling a coaxial transmission line to a rectangular waveguide. More particularly the invention relates to such a transition which incorporates a barrier or window to separate two regions in a waveguide or waveguide system and provides for the transmission of electromagnetic waves between the two regions.
- the designer recognizes that transmission of microwave power through the system at the level at which the waveguide fails due to voltage arc-over normally is not possible because of other elements in the microwave waveguide system. In other words, other elements in the system do not have the power handling capability of the waveguide. For example, transitions of the type under consideration are wont to break down at a lower power level than the waveguide due to the presence of high electric and magnetic fields in the transition. Another problem encountered when using a transition in waveguide systems is the introduction of reflections at the transition.
- An object of the present invention is to ameliorate the voltage breakdown problem in the doorknob type transition.
- transition An example of an application in which the transition provided is of particular use is found at the input and output waveguide connections of an electronic tube which operates at microwave frequencies. .In such applications electromagnetic energy must be transmitted between the evacuated interior of the tube envelope and waveguide systems which may be maintained at atmospheric pressures.
- Other applications where the particular transition is of use is found in systems where a barrier is required to prevent the escape of gas from a pressurized system or where a barrier is required to'contain a cooling or insulating fluid in a waveguidin-g system.
- the transition is provided with a barrier so that the coaxial line and the waveguide systems which are joined by the transition may be maintained at different pressures or contain different media.
- a doorknob type transition between coaxial line and waveguide is provided with a barrier whereby the coaxial line (the part of the system most likely to fail by voltage arc-over) may be maintained under vacuum or other pressure to reduce possibility of voltage breakdown.
- FIGURE is a central, vertical, longitudinal section taken through a coaxial line to wave guide transition illustrating the present invention.
- the single FIGURE of the drawing shows a coaxial line to waveguide transition embodying the present invention. From an inspection of the FIGURE it is seen that a coaxial transmission line v10 is joined to a waveguide 13 of rectangular cross section.
- the coaxial transmission line 10 includes an outer conductor 11 having the configuration of a hollow right circular cylinder and a solid inner conductor 12 of circular cross section concentrically disposed within the outer conductor 11.
- Therectangular waveguide .13 has walls composed of a conductive material.
- the upper and lower walls 14 and 15 respectively of the rectangular waveguide are the broad walls. *One end of the rectangular waveguide 13 is closed by a rectangular conductive end wall '16 while the other end remains open so that electromagnetic waves may pass into or out of the waveguide 13.
- a circular aperture 17 is provided in the upper broad wall 14 of the waveguide.
- the aperture has a diameter that exactly corresponds to the internal diameter of the outer conductor 11 of the coaxial transmission line.
- the outer conductor 11 of the coaxial transmission line is positioned with one end around the aperture 117 and joined thereto as by brazing to form a joint which is mechanically sound and preferably vacuum tight.
- the center conductor 12 of the coaxial transmission line 10 extends on beyond the end of the outer conductor 11 across the waveguide 13 and is terminated on the opposite side of the guide in a conductive knob l8 which has a shape similar to a doorknob.
- the shape of the terminal knob 18 gives the transition its name.
- the terminal knob 18 may also be considered to have the appearance of an inverted wine glass with the stem of the wine glass forming the center conductor :12 of the coaxial transmission line and the upper part of the wine glass being flush against the lower broad wall 15 of the waveguide.
- the terminal knob 18 (doorknob) may be considered an inverted stub in a cross coaxial line and waveguide transition.
- the stub is to match the susceptance as measured in the coaxial line which excites the waveguide or is excited by electromagnetic energy in the waveguide.
- the limit on the peak power handling capability of the doorknob transition is the peak power handling capability of the coaxial transmission line 10.
- the transition is constructed in such a manner as to allow the coaxial transmission line to be evacuated hence greatly increasing the dielectric strength within the line.
- a cylindrical dielectric microwave window 20 is interposed in the transition in such a manner as to a
- the doorknob terminal 18 of the transition is provided with a relatively deep groove 21 which extends concentrically around the center conductor 12 and has a diameter corresponding to that of the window 20 and a width which corresponds to the thickness of the window 20.
- the outer surface is metallized around both ends and its inner surface is metallized at its lower end.
- the lower end of the cylindrical window 20 is inserted in the groove 21 provided in the knob 18 and the upper end of the Window 20 protrudes up into the outer conductor 11 of the coaxial transmission line 10.
- the opposite ends of the window are then sealed in vacuum tight relation to the coaxial transmission line and the doorknob terminal 18.
- the groove 21 in which the lower portion of the window 20 is seated is made deeper than is necessary to hold the window in order to provide an additional inductance or inductive cut to obtain better match- While a particular embodiment of the invention has been shown it will, of course, be understood that the invention is not limited thereto since many modifications in the arrangement may be made.
- the increased power handling capability of the transition results from making the transition in such a way that the dielectric inside the coaxial transmission line may be increased.
- the coaxial transmission line 10 may be either pressurized or evacuated.
- the diameter of the window 20 may be increased by changing the configuration only slightly so that the coaxial window sits wholly within the waveguide 13.
- a transition for coupling waveguide systems including a coaxial transmission line segment for connection to one waveguide system; a rectangular waveguide segment for connection to a second waveguide system, said waveguide segment comprising at least two oppositely disposed walls; a comductive knob-like member; and a barrier providing a vacuum tight seal between said segments; said rectangular waveguide segment being provided with an aperture through one of said walls; said coaxial transmission line segment comprising an outer conductor and an inner conductor having a portion thereof extending beyond the end of said outer conductor; said outer conductor being positioned with said end adjacent said one wall in such a manner that said end terminates at said one wall and said inner conductor portion extends through the aperture; said knob-like member having the base thereof conductively alfixed to the other of said walls in a position opposite to said aperture and having the upper portion thereof conductively joined to said inner conductor portion, said knoblike member being larger in diameter than said aperture; said knob-like member having an annular groove extending therearound and in concentric relationship with said inner conductor portion; said barrier compris
- a first hollow conductive waveguide means having a rectangular cross section defining at least two oppositely dis-posed walls and provided with an aperture in one of said walls
- a second conductive waveguide means which includes a coaxial transmission line having an inner and an outer conductor, said inner conductor having a portion thereof extending beyond the end of said outer conductor, a conductive knob-like member larger in diameter than said aperture and having the base thereof conductively afiixed to the other of said walls in a position opposite to said aperture, and a hollow cylindrical dielectric barrier open at both ends thereof
- said second conductive waveguide means positioned adjacent the aperture in said one wall of said first conductive waveguide means in such a manner that said outer conductor conductively engages said one wall and said inner conductor portion extends across the interior of said first waveguide means and is conductively joined to the upper portion of said knob-like member, said knoblike member having an annular groove therearound
- a hollow waveguide member of rectangular cross section provided with an aperture in one wall a coaxial transmission line having a hollow outer conductor and an inner conductor, said inner conductor having a portion thereof extending beyond the end of said outer conductor, a knob-like conductive terminal larger in diameter than said aperture and having the base thereof conductively afiixed to the wall of said waveguide member opposite to said one wall, and a hollow cylindrical dielectric barrier open at both ends thereof, said coaxial transmission line being positioned adjacent said waveguide member in such a manner that said outer conductor conductively engages said one wall and surrounds the aperture therein and said inner conductor portion extends through the aperture across the interior of said waveguide member and is conductively joined to the upper portion of said knob-like terminal, said cylindrical barrier being positioned within said waveguide member concentrically around said inner conductor portion in such a manner as to form a vacuum tight barrier between said transmission line and said waveguide member.
Landscapes
- Waveguide Connection Structure (AREA)
Description
COAXIAL LINE T0 WAVEGUIDE TRANSITION Filed May 6, 1960 INVENTORZ JAMES M. LIND mww HIS ATTORNEY.
United States Patent 3,086,181 Patented Apr. 16, 1963 3,086,181 COAXIAL LINE T WAVEGUIDE TRANSITION James N. Lind, Lexington, Mass., assignor to General Electric Company, a corporation of New York Filed May 6, 1960, Ser. No. 27,299 3 Claims. (Cl. 333-34) This invention relates to transmission :line transition units for coupling a coaxial transmission line to a rectangular waveguide. More particularly the invention relates to such a transition which incorporates a barrier or window to separate two regions in a waveguide or waveguide system and provides for the transmission of electromagnetic waves between the two regions.
In designing waveguide systems, the designer recognizes that transmission of microwave power through the system at the level at which the waveguide fails due to voltage arc-over normally is not possible because of other elements in the microwave waveguide system. In other words, other elements in the system do not have the power handling capability of the waveguide. For example, transitions of the type under consideration are wont to break down at a lower power level than the waveguide due to the presence of high electric and magnetic fields in the transition. Another problem encountered when using a transition in waveguide systems is the introduction of reflections at the transition.
The problems encountered in providing a transition from coaxial lines to waveguides and various solutions to the problem are discused in greater detail in Microwave Transmission Circuits by G. L. Ragan, volume 9 of the MIT Radiation Laboratory Series, 1948, pp. 314 to 361, Transition from Coaxial Lines to Waveguides by F. L. Nieman. Specific reference is made to the discussion of the doorknob type transitions found on pp. 349 through 353 inclusive. As is pointed out in the Ragan reference one of the best solutions to the problems encountered in providing coaxial line to wave guide transitions is the transition known in the art as the doorkno type. The reference also points out that the reilection problems are reduced to a minimum by the use of this transition and that the limitations on the use of this type of transition have been failure of the coaxial line by voltage breakdown.
An object of the present invention is to ameliorate the voltage breakdown problem in the doorknob type transition.
An example of an application in which the transition provided is of particular use is found at the input and output waveguide connections of an electronic tube which operates at microwave frequencies. .In such applications electromagnetic energy must be transmitted between the evacuated interior of the tube envelope and waveguide systems which may be maintained at atmospheric pressures. Other applications where the particular transition is of use is found in systems where a barrier is required to prevent the escape of gas from a pressurized system or where a barrier is required to'contain a cooling or insulating fluid in a waveguidin-g system. In other words, the transition is provided with a barrier so that the coaxial line and the waveguide systems which are joined by the transition may be maintained at different pressures or contain different media.
In carrying out the present invention a doorknob type transition between coaxial line and waveguide is provided with a barrier whereby the coaxial line (the part of the system most likely to fail by voltage arc-over) may be maintained under vacuum or other pressure to reduce possibility of voltage breakdown.
The novel features which are believed to be characteristic of the invention are set forth in the appended claims. The invention itself however, both as to its organization and method of operation together with further objects and advantages thereof may best be understood by reference to the following description taken in connection with the accompanying drawing in which the only FIGURE is a central, vertical, longitudinal section taken through a coaxial line to wave guide transition illustrating the present invention.
The single FIGURE of the drawing shows a coaxial line to waveguide transition embodying the present invention. From an inspection of the FIGURE it is seen that a coaxial transmission line v10 is joined to a waveguide 13 of rectangular cross section. The coaxial transmission line 10 includes an outer conductor 11 having the configuration of a hollow right circular cylinder and a solid inner conductor 12 of circular cross section concentrically disposed within the outer conductor 11. Therectangular waveguide .13 has walls composed of a conductive material. The upper and lower walls 14 and 15 respectively of the rectangular waveguide are the broad walls. *One end of the rectangular waveguide 13 is closed by a rectangular conductive end wall '16 while the other end remains open so that electromagnetic waves may pass into or out of the waveguide 13.
In order to join the coaxial transmission line 10 to the waveguide '13 a circular aperture 17 is provided in the upper broad wall 14 of the waveguide. As illustrated, the aperture has a diameter that exactly corresponds to the internal diameter of the outer conductor 11 of the coaxial transmission line. Thus, the outer conductor 11 of the coaxial transmission line is positioned with one end around the aperture 117 and joined thereto as by brazing to form a joint which is mechanically sound and preferably vacuum tight. In order to achieve the transition the center conductor 12 of the coaxial transmission line 10 extends on beyond the end of the outer conductor 11 across the waveguide 13 and is terminated on the opposite side of the guide in a conductive knob l8 which has a shape similar to a doorknob. The shape of the terminal knob 18 gives the transition its name. The terminal knob 18 may also be considered to have the appearance of an inverted wine glass with the stem of the wine glass forming the center conductor :12 of the coaxial transmission line and the upper part of the wine glass being flush against the lower broad wall 15 of the waveguide. The terminal knob 18 (doorknob) may be considered an inverted stub in a cross coaxial line and waveguide transition. The
purpose of the stub is to match the susceptance as measured in the coaxial line which excites the waveguide or is excited by electromagnetic energy in the waveguide.
The transition described up to this point is a doorknob transition of the type discussed in the Ragan reference supra. It is felt that a discussion of the design parameters necessary to obtain the desired matching is not in order here since the design of such a transition is adequately described in the Ragan reference.
As previously indicated the limit on the peak power handling capability of the doorknob transition is the peak power handling capability of the coaxial transmission line 10. In order to increase the power handling capability of the coaxial transmission line the transition is constructed in such a manner as to allow the coaxial transmission line to be evacuated hence greatly increasing the dielectric strength within the line. In order to accomplish this a cylindrical dielectric microwave window 20 is interposed in the transition in such a manner as to a In addition, the doorknob terminal 18 of the transition is provided with a relatively deep groove 21 which extends concentrically around the center conductor 12 and has a diameter corresponding to that of the window 20 and a width which corresponds to the thickness of the window 20. In order to seal the opposite ends of the cylindrical window to the elements of the transition the outer surface is metallized around both ends and its inner surface is metallized at its lower end. The lower end of the cylindrical window 20 is inserted in the groove 21 provided in the knob 18 and the upper end of the Window 20 protrudes up into the outer conductor 11 of the coaxial transmission line 10. The opposite ends of the window are then sealed in vacuum tight relation to the coaxial transmission line and the doorknob terminal 18. As illustrated, the groove 21 in which the lower portion of the window 20 is seated is made deeper than is necessary to hold the window in order to provide an additional inductance or inductive cut to obtain better match- While a particular embodiment of the invention has been shown it will, of course, be understood that the invention is not limited thereto since many modifications in the arrangement may be made. For example, the increased power handling capability of the transition results from making the transition in such a way that the dielectric inside the coaxial transmission line may be increased. Thus, it is apparent that the coaxial transmission line 10 may be either pressurized or evacuated. Further, it is apparent that the diameter of the window 20 may be increased by changing the configuration only slightly so that the coaxial window sits wholly within the waveguide 13. In this manner the dielectric losses in the window are decreased since increasing its diameter positions the dielectric window 20 in regions of weaker electric fields. It is also apparent that cooling may easily be achieved by making the center conductor 12 of the coaxial transmission line 10 hollow and circulating a cooling fluid through it. It is contemplated that the appended claims will cover this modification and other modifications as fall within the true spirit and scope of this invention.
What I claim is new and desire to secure by Letters Patent of the United States is:
1. A transition for coupling waveguide systems including a coaxial transmission line segment for connection to one waveguide system; a rectangular waveguide segment for connection to a second waveguide system, said waveguide segment comprising at least two oppositely disposed walls; a comductive knob-like member; and a barrier providing a vacuum tight seal between said segments; said rectangular waveguide segment being provided with an aperture through one of said walls; said coaxial transmission line segment comprising an outer conductor and an inner conductor having a portion thereof extending beyond the end of said outer conductor; said outer conductor being positioned with said end adjacent said one wall in such a manner that said end terminates at said one wall and said inner conductor portion extends through the aperture; said knob-like member having the base thereof conductively alfixed to the other of said walls in a position opposite to said aperture and having the upper portion thereof conductively joined to said inner conductor portion, said knoblike member being larger in diameter than said aperture; said knob-like member having an annular groove extending therearound and in concentric relationship with said inner conductor portion; said barrier comprising a cylindrical dielectric member open at both ends thereof and having one end positioned and sealed in the annular groove and the opposite end extending at least to said one wall and sealed thereto.
2. In a transition assembly which provides a vacuum tight barrier between two waveguide systems and permits transmission of electromagnetic waves between the systems, a first hollow conductive waveguide means having a rectangular cross section defining at least two oppositely dis-posed walls and provided with an aperture in one of said walls, a second conductive waveguide means which includes a coaxial transmission line having an inner and an outer conductor, said inner conductor having a portion thereof extending beyond the end of said outer conductor, a conductive knob-like member larger in diameter than said aperture and having the base thereof conductively afiixed to the other of said walls in a position opposite to said aperture, and a hollow cylindrical dielectric barrier open at both ends thereof, said second conductive waveguide means positioned adjacent the aperture in said one wall of said first conductive waveguide means in such a manner that said outer conductor conductively engages said one wall and said inner conductor portion extends across the interior of said first waveguide means and is conductively joined to the upper portion of said knob-like member, said knoblike member having an annular groove therearound concentric vvith said inner conductor portion, said hollow cylindrical barrier being positioned with one end in said annular groove and sealed thereto and the opposite end extending at least to the said one wall of said first waveguide means and sealed thereto.
3. In combination in a transition assembly for coupling waveguide systems and providing a vacuum tight barrier between the systems, a hollow waveguide member of rectangular cross section provided with an aperture in one wall a coaxial transmission line having a hollow outer conductor and an inner conductor, said inner conductor having a portion thereof extending beyond the end of said outer conductor, a knob-like conductive terminal larger in diameter than said aperture and having the base thereof conductively afiixed to the wall of said waveguide member opposite to said one wall, and a hollow cylindrical dielectric barrier open at both ends thereof, said coaxial transmission line being positioned adjacent said waveguide member in such a manner that said outer conductor conductively engages said one wall and surrounds the aperture therein and said inner conductor portion extends through the aperture across the interior of said waveguide member and is conductively joined to the upper portion of said knob-like terminal, said cylindrical barrier being positioned within said waveguide member concentrically around said inner conductor portion in such a manner as to form a vacuum tight barrier between said transmission line and said waveguide member.
References Cited in the file of this patent UNITED STATES PATENTS 2,434,508 Okress et al. Jan. 13, 1948 2,530,171 Okress Nov. 14, 1950 2,922,127 Dench Jan. 19, 1960 FOREIGN PATENTS 1,068,324 Germany Nov. 5, 1959 OTHER REFERENCES Ragan: Microwave Transmission Circuits, vol. 9, Rad. Lab. Series, 1948, page 341.
Claims (1)
1. A TRANSITION FOR COUPLING WAVEGUIDE SYSTEMS INCLUDING A COAXIAL TRANSMISSION LINE SEGMENT FOR CONNECTION TO ONE WAVEGUIDE SYSTEM; A RECTANGULAR WAVEGUIDE SEGMENT FOR CONNECTION TO A SECOND WAVEGUIDE SYSTEM, SAID WAVEGUIDE SEGMENT COMPRISING AT LEAST TWO OPPOSITELY DISPOSED WALLS; A COMDUCTIVE KNOB-LIKE MEMBER; AND A BARRIER PROVIDING A VACUUM TIGHT SEAL BETWEEN SAID SEGMENTS; SAID RECTANGULAR WAVEGUIDE SEGMENT BEING PROVIDED WITH AN APERTURE THROUGH ONE OF SAID WALLS; SAID COAXIAL TRANSMISSION LINE SEGMENT COMPRISING AN OUTER CONDUCTOR AND AN INNER CONDUCTOR HAVING A PORTION THEREOF EXTENDING BEYOND THE END OF SAID OUTER CONDUCTOR; SAID OUTER CONDUCTOR BEING POSITIONED WITH SAID END ADJACENT SAID ONE WALL IN SUCH A MANNER THAT SAID END TERMINATES AT SAID ONE WALL AND SAID INNER CONDUCTOR PORTION EXTENDS THROUGH THE APERTURE; SAID KNOB-LIKE MEMBER HAVING THE BASE THEREOF CONDUCTIVELY AFFIXED TO THE OTHER OF SAID WALLS IN A POSITION OPPOSITE TO SAID APERTURE AND HAVING THE UPPER PORTION THEREOF CONDUCTIVELY JOINED TO SAID INNER CONDUCTOR PORTION, SAID KNOBLIKE MEMBER BEING LARGER IN DIAMETER THAN SAID APERTURE; SAID KNOB-LIKE MEMBER HAVING AN ANNULAR GROOVE EXTENDING THEREAROUND AND IN CONCENTRIC RELATIONSHIP WITH SAID INNER CONDUCTOR PORTION; SAID BARRIER COMPRISING A CYLINDRICAL DIELECTRIC MEMBER OPEN AT BOTH ENDS THEREOF AND HAVING ONE END POSITIONED AND SEALED IN THE ANNULAR GROOVE AND THE OPPOSITE END EXTENDING AT LEAST TO SAID ONE WALL AND SEALED THERETO.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27299A US3086181A (en) | 1960-05-06 | 1960-05-06 | Coaxial line to waveguide transition |
FR860853A FR1288556A (en) | 1960-05-06 | 1961-05-05 | Transition device between a coaxial line and a waveguide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27299A US3086181A (en) | 1960-05-06 | 1960-05-06 | Coaxial line to waveguide transition |
Publications (1)
Publication Number | Publication Date |
---|---|
US3086181A true US3086181A (en) | 1963-04-16 |
Family
ID=21836881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US27299A Expired - Lifetime US3086181A (en) | 1960-05-06 | 1960-05-06 | Coaxial line to waveguide transition |
Country Status (1)
Country | Link |
---|---|
US (1) | US3086181A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3182272A (en) * | 1963-04-22 | 1965-05-04 | Microwave Dev Lab Inc | Waveguide to coaxial l transition having the coaxial outer conductor extending into the waveguide |
US3478282A (en) * | 1965-04-15 | 1969-11-11 | Cossor Ltd A C | Couplings between waveguides and coaxial lines |
US4652840A (en) * | 1984-07-20 | 1987-03-24 | Nec Corporation | Ultrahigh-frequency switch |
US4740764A (en) * | 1987-06-03 | 1988-04-26 | Varian Associates, Inc. | Pressure sealed waveguide to coaxial line connection |
US4988961A (en) * | 1989-08-10 | 1991-01-29 | General Signal Corporation | Device for achieving minimal reflections in antenna coupling |
US10522887B2 (en) | 2017-10-20 | 2019-12-31 | Waymo Llc | Communication system for a vehicle comprising a dual channel rotary joint coupled to a plurality of interface waveguides for coupling electromagnetic signals between plural communication chips |
US11152675B2 (en) | 2017-10-20 | 2021-10-19 | Waymo Llc | Communication system for LIDAR sensors used in a vehicle comprising a rotary joint with a bearing waveguide for coupling signals with communication chips |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2434508A (en) * | 1942-09-02 | 1948-01-13 | Westinghouse Electric Corp | Coupling device |
US2530171A (en) * | 1944-06-06 | 1950-11-14 | Westinghouse Electric Corp | Magnetron output terminal |
DE1068324B (en) * | 1959-11-05 | |||
US2922127A (en) * | 1957-01-16 | 1960-01-19 | Edward C Dench | Output coupling |
-
1960
- 1960-05-06 US US27299A patent/US3086181A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1068324B (en) * | 1959-11-05 | |||
US2434508A (en) * | 1942-09-02 | 1948-01-13 | Westinghouse Electric Corp | Coupling device |
US2530171A (en) * | 1944-06-06 | 1950-11-14 | Westinghouse Electric Corp | Magnetron output terminal |
US2922127A (en) * | 1957-01-16 | 1960-01-19 | Edward C Dench | Output coupling |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3182272A (en) * | 1963-04-22 | 1965-05-04 | Microwave Dev Lab Inc | Waveguide to coaxial l transition having the coaxial outer conductor extending into the waveguide |
US3478282A (en) * | 1965-04-15 | 1969-11-11 | Cossor Ltd A C | Couplings between waveguides and coaxial lines |
US4652840A (en) * | 1984-07-20 | 1987-03-24 | Nec Corporation | Ultrahigh-frequency switch |
US4740764A (en) * | 1987-06-03 | 1988-04-26 | Varian Associates, Inc. | Pressure sealed waveguide to coaxial line connection |
US4988961A (en) * | 1989-08-10 | 1991-01-29 | General Signal Corporation | Device for achieving minimal reflections in antenna coupling |
US10522887B2 (en) | 2017-10-20 | 2019-12-31 | Waymo Llc | Communication system for a vehicle comprising a dual channel rotary joint coupled to a plurality of interface waveguides for coupling electromagnetic signals between plural communication chips |
US11152675B2 (en) | 2017-10-20 | 2021-10-19 | Waymo Llc | Communication system for LIDAR sensors used in a vehicle comprising a rotary joint with a bearing waveguide for coupling signals with communication chips |
US11688917B2 (en) | 2017-10-20 | 2023-06-27 | Waymo Llc | Radar system for use in a vehicle comprising a rotary joint where a non-rotational unit is fixed to the vehicle and a rotational unit includes antennas configured for use with radar signals |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2421912A (en) | Electron discharge device of the cavity resonator type | |
US2523841A (en) | Wave guide coupler | |
US3310704A (en) | Output coupling circuit for microwave tube apparatus | |
US2489131A (en) | Electron discharge device of the cavity resonator type | |
US3086181A (en) | Coaxial line to waveguide transition | |
US3593224A (en) | Microwave tube transformer-window assembly having a window thickness equivalent to one-quarter wavelength and metallic step members to transform impedance | |
US3439296A (en) | Microwave window employing a half-wave window structure with internal inductive matching structure | |
US2786185A (en) | Microwave output window | |
US3634790A (en) | Parasitic mode suppressor | |
US3775709A (en) | Improved output window structure for microwave tubes | |
US3324427A (en) | Electromagnetic wave permeable window | |
RU2705563C1 (en) | Input/output round-to-rectangular waveguide of microwave energy | |
US3753171A (en) | Composite microwave window and waveguide transform | |
US2282856A (en) | Magnetron oscillator | |
US2698421A (en) | Wave guide seal and filter structure | |
US3636402A (en) | Coupled cavity-type slow-wave structure | |
US2886742A (en) | Broadband output coupler | |
US3448331A (en) | Composite coaxial coupling device and coaxial window | |
US3058073A (en) | Transmission line windows | |
US2843790A (en) | Traveling wave amplifier | |
US4985659A (en) | Travelling wave tube provided with an impervious coupling device between its delay line and an external microwave circuit | |
US2768327A (en) | Wave guide output circuit for a magnetron | |
US2895110A (en) | High frequency apparatus | |
US3076122A (en) | Magnetron device | |
US3432716A (en) | Microwave transducer and electron device with microwave transducer |