US2526383A - Wave guide mode converter - Google Patents

Wave guide mode converter Download PDF

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Publication number
US2526383A
US2526383A US4022A US402248A US2526383A US 2526383 A US2526383 A US 2526383A US 4022 A US4022 A US 4022A US 402248 A US402248 A US 402248A US 2526383 A US2526383 A US 2526383A
Authority
US
United States
Prior art keywords
guide
rectangular
section
mode
wave
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
Application number
US4022A
Other languages
English (en)
Inventor
Edwin H Meier
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.)
General Electric Co
Original Assignee
General Electric Co
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.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US4022A priority Critical patent/US2526383A/en
Priority to GB1517/49A priority patent/GB690027A/en
Priority to FR979314D priority patent/FR979314A/fr
Application granted granted Critical
Publication of US2526383A publication Critical patent/US2526383A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/06—Movable joints, e.g. rotating joints
    • H01P1/062—Movable joints, e.g. rotating joints the relative movement being a rotation
    • H01P1/066—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation
    • H01P1/067—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation the energy being transmitted in only one line located on the axis of rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/904—Well pump driven by fluid motor mounted above ground

Definitions

  • VMy invention relates to a'wave guidestructure and, more particularly, to a Wave guide structure for converting from a rectangular wave guide to a circular wave guide.Y l
  • a further object of my invention is joint that is simple and has small losses.
  • Fig. 1 is a block diagram of a typical rotating coupling section
  • Fig. 2 is a side view of a wave guide structure embodying my invention
  • Fig. 3 is an end view of the structure shown in Fig. 2
  • Figs. 4 and 5 are cross-sectional views through the guide sections in Fig. 2 conventionally showing the electrical and magnetic vectors for waves therein.
  • FIG. 1 For a better understanding of my invention, now refer to a typical rotating coupling section as shown Vin Fig. 1 in which I have showna rectangular input guide I, and a rectangular output guide 8 which may rotate with respect to the guide I about the axis AA.
  • the rectangular guides'I and 8 are connected to the conversion joints 2 and I respectively.
  • the conversion joint 2 is used to convert from the TEoi mode in the rectangular n guide to a suitable mode in the cylindrical guide.
  • the .conversion jointl which may be identical in construction ⁇ to the joint 2, is used to convert from ⁇ the mode in guide li to the TEoi mode in the rectangular guide 8.
  • the rst utilizes the circular f 'IlVlml mode'for ⁇ the. cylindrical guides 3 and V6 with 2 and 'i being conversion joints for converting the TEoi .wave Vpropagated in the rec- Y tangular guide to this circular mode in the cylin- ⁇ drical guide.
  • lA cylindrical guide which will Y Vpropagate the symmetrical TMm mode will necessarily propagate the circular TEn mode which is Vnonsyrrmietrical about the longitudinal axis ,of
  • the cross section of the cylindrical guide propagating the TMm mode in this case must be relatively large corn-- pared to that of the rectangular guide vwhich causes the conversion joint to be correspondingly large.
  • the conversion joints- 2 and l comprise ⁇ means vfor converting from the TEM wave of the sions'that they propagate waves of the TEn mode.
  • the choke rotating joints as shown at il and 5 comprise conventional chokes for this type of guide and mode.
  • a rectangular wave guide section Ill having an inductive diaphragm l I disposed within the section intermediate its ends and having its upper end joining with the circular wave guide section I2.
  • a short-circuiting plate I3 Across a stub end of the guide I2 is connected a short-circuiting plate I3.
  • the rectangular wave guide Ill is secured to the side of the cylinder guide I2 with the broad face of the rectangular'guide parallel to the axis y of the cylinder guide.
  • An opening is formed in the wall of the cylinder guide having the same dimensions as the cross section of the end of the rectangular guide. To one side of this' opening the guide extends towards the rotating joint and the converted power is propagated along this leg.
  • the circular guide is short-circuited by plate I3 and the metallic web I I which is supported directly in iront o the plate I3.
  • the Yweb I4 and plate I3 produce two equal electrical vectors, one of which is parallel to the web and the other perpendicular to it. The vector parallel to the web is short-circuited at the leading edge of the web.
  • the perpendicular vector is reflected by plate I3 at the end of the stub.
  • the web IIS is electrically 1/8 guide wave length in length
  • lthe two equal vectors are perpendicular and have ra phase difference of 90 degrees which results in a 'circular polarized wave being propagated along the cylindrical guide.
  • the wave can be fed back into the rectangular guide exactly the same as the one originally supplied. This permits the circular section to be mechanically rotated without affecting the energy supplied tothe output line.
  • the radio frequency energy is supplied from the rectangular guide into the cylindrical guide lv ⁇ with its polarization at an angle of 45 degrees with the plane of the web. This causes two 'components of the 'IEn mode polarized at right angles to one another to be propagated toward the rotating joint. If these two components are equal and 90 degrees out oi time phase, the desired circular polarization is obtained. These conditions are obtained when the distance a in Fig.r2 is equal to 1A; guide wave length and the distance b is equal approximately to 1% guide wave length. Conventional representations of the electrical and magnetic Vectors in the guide sections I9 and I2 are shown in Figs. 4 and 5, for the TEoi and TEn modes respectively.
  • the inductive diaphragm I I in the rectangular guide near the conversion joint is necessary to match the discontinuity caused by the conversion joint.
  • a rectangular section a circular section, said rectangular section having its major transverse axis parallel to the longitudinal axis of said circular section and its longitudinal axis substantially perpendicular to the longitudinal axis of said circular section, said circular section having a stub end extending at least 1/Zelectrical wave length beyond the adjacent wall of said rectangular guide and terminated by a shorting member, a web member adjacent said shorting member and extending along Athe longitudinal axis of said circular section forY substantially 1/8 electrical wave length and forming an acute angle with the longitudinal axis Voi'said rectangular section, the lengths of said stub and web members and said angle being selected to cause guided waves to be converted from the TEM mode to the TEu mode.
  • a pair of substantially similar relative rotatable wave guide sections each section having a rectangular section and a circular section, said rectangular section having its major transverse axis parallel to the longitudinal axis of saidrcircular section and its longitudinal axis substantially perpendicular to the longitudinal faxis of said circular section, said circular section having a stub end extending at least 1A?

Landscapes

  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Aerials With Secondary Devices (AREA)
US4022A 1948-01-23 1948-01-23 Wave guide mode converter Expired - Lifetime US2526383A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US4022A US2526383A (en) 1948-01-23 1948-01-23 Wave guide mode converter
GB1517/49A GB690027A (en) 1948-01-23 1949-01-19 Improvements in and relating to wave guide structures
FR979314D FR979314A (fr) 1948-01-23 1949-01-20 Structure mobile de guides d'ondes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4022A US2526383A (en) 1948-01-23 1948-01-23 Wave guide mode converter

Publications (1)

Publication Number Publication Date
US2526383A true US2526383A (en) 1950-10-17

Family

ID=21708746

Family Applications (1)

Application Number Title Priority Date Filing Date
US4022A Expired - Lifetime US2526383A (en) 1948-01-23 1948-01-23 Wave guide mode converter

Country Status (3)

Country Link
US (1) US2526383A (fr)
FR (1) FR979314A (fr)
GB (1) GB690027A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766430A (en) * 1953-04-02 1956-10-09 Gen Precision Lab Inc Microwave power divider
US2783439A (en) * 1952-01-03 1957-02-26 Bendix Aviat Corp Continuously rotatable microwave phase shifter
US2800632A (en) * 1950-09-06 1957-07-23 Sylvania Electric Prod Wave guide mode transformer
US2816271A (en) * 1950-11-22 1957-12-10 Gen Electric Microwave mode converter
US2983883A (en) * 1953-01-15 1961-05-09 Gen Precision Inc Micro wave valves
US2993140A (en) * 1957-05-13 1961-07-18 High Voltage Engineering Corp High power phase shifter
US3016504A (en) * 1957-07-26 1962-01-09 Alford Andrew Rotatable waveguide joint
US3864688A (en) * 1972-03-24 1975-02-04 Andrew Corp Cross-polarized parabolic antenna
US4511868A (en) * 1982-09-13 1985-04-16 Ball Corporation Apparatus and method for transfer of r.f. energy through a mechanically rotatable joint
EP0243888A1 (fr) * 1986-04-28 1987-11-04 Alcatel Espace Dispositif à joint tournant hyperfréquence
US20110057849A1 (en) * 2009-09-08 2011-03-10 Orbit Communication Ltd. Dynamic polarization adjustment for a ground station antenna

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8501440D0 (en) * 1985-01-21 1985-02-20 Era Patents Ltd Circularly polorizing antenna feed
IL98879A (en) * 1991-07-18 1994-05-30 Israel State Junction between a circular and a rectangular waveguide

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129669A (en) * 1937-03-30 1938-09-13 Bell Telephone Labor Inc Guided wave transmission
US2253503A (en) * 1938-08-06 1941-08-26 Bell Telephone Labor Inc Generation and transmission of high frequency oscillations
US2407267A (en) * 1943-03-05 1946-09-10 Sperry Gyroscope Co Inc Ultra high frequency attenuator
US2407318A (en) * 1942-06-18 1946-09-10 Sperry Gyroscope Co Inc High-frequency apparatus
US2458579A (en) * 1945-04-26 1949-01-11 Bell Telephone Labor Inc Microwave modulator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129669A (en) * 1937-03-30 1938-09-13 Bell Telephone Labor Inc Guided wave transmission
US2253503A (en) * 1938-08-06 1941-08-26 Bell Telephone Labor Inc Generation and transmission of high frequency oscillations
US2407318A (en) * 1942-06-18 1946-09-10 Sperry Gyroscope Co Inc High-frequency apparatus
US2407267A (en) * 1943-03-05 1946-09-10 Sperry Gyroscope Co Inc Ultra high frequency attenuator
US2458579A (en) * 1945-04-26 1949-01-11 Bell Telephone Labor Inc Microwave modulator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800632A (en) * 1950-09-06 1957-07-23 Sylvania Electric Prod Wave guide mode transformer
US2816271A (en) * 1950-11-22 1957-12-10 Gen Electric Microwave mode converter
US2783439A (en) * 1952-01-03 1957-02-26 Bendix Aviat Corp Continuously rotatable microwave phase shifter
US2983883A (en) * 1953-01-15 1961-05-09 Gen Precision Inc Micro wave valves
US2766430A (en) * 1953-04-02 1956-10-09 Gen Precision Lab Inc Microwave power divider
US2993140A (en) * 1957-05-13 1961-07-18 High Voltage Engineering Corp High power phase shifter
US3016504A (en) * 1957-07-26 1962-01-09 Alford Andrew Rotatable waveguide joint
US3864688A (en) * 1972-03-24 1975-02-04 Andrew Corp Cross-polarized parabolic antenna
US4511868A (en) * 1982-09-13 1985-04-16 Ball Corporation Apparatus and method for transfer of r.f. energy through a mechanically rotatable joint
EP0243888A1 (fr) * 1986-04-28 1987-11-04 Alcatel Espace Dispositif à joint tournant hyperfréquence
US20110057849A1 (en) * 2009-09-08 2011-03-10 Orbit Communication Ltd. Dynamic polarization adjustment for a ground station antenna

Also Published As

Publication number Publication date
FR979314A (fr) 1951-04-25
GB690027A (en) 1953-04-08

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