GB1078304A - Improvements in or relating to electromagnetic wave transmission lines - Google Patents

Improvements in or relating to electromagnetic wave transmission lines

Info

Publication number
GB1078304A
GB1078304A GB2847264A GB2847264A GB1078304A GB 1078304 A GB1078304 A GB 1078304A GB 2847264 A GB2847264 A GB 2847264A GB 2847264 A GB2847264 A GB 2847264A GB 1078304 A GB1078304 A GB 1078304A
Authority
GB
United Kingdom
Prior art keywords
mode
wires
circular
dielectric
tube
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
Application number
GB2847264A
Inventor
Marier Pierre Prache
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT 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.)
Filing date
Publication date
Priority claimed from FR943907A external-priority patent/FR1372611A/en
Priority claimed from FR972909A external-priority patent/FR85669E/en
Application filed by Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Publication of GB1078304A publication Critical patent/GB1078304A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides
    • H01P3/127—Hollow waveguides with a circular, elliptic, or parabolic cross-section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/162—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion absorbing spurious or unwanted modes of propagation

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Waveguide Aerials (AREA)

Abstract

1,078,304. Waveguides. LIGNES TELEGRAPHIQUES & TELEPHONIQUES. July 10, 1964 [Aug. 6, 1963], No. 28472/64. Heading H1W. In a waveguide for the propagation of the fundamental circular TE or TM mode a number of fine conductive wires are positioned in a dielectric tube along lines following zero components of the electric field of the desired mode TE or TM, whereby the other mode TM or TE is suppressed. The invention may be applied to a waveguide solely comprising a dielectric tube 8, Fig. 6, or rod, with or without a surrounding metallic shield 7. The guide shown is intended for the circular TM mode and includes fine circular wires 10, of e.g. copper, embedded in the high-permittivity tube 8 and in the low-permittivity spacers 9, the wires being effective to suppress the TE circular mode. In the case of a guide intended for the TE mode, radial or longitudinal wires are embedded in the dielectric tube for suppression of the TM mode. A similar guide (Fig. 7, not shown), propagates the so-called circular TM "dielectric mode " and, in addition to the circular TE mode, it is necessary to suppress the circular TM mode guided by the shield 7. This so-called " metallically-guided " mode has a longitudinal component which is non-zero at a radial position where the corresponding component of the desired dielectric mode is zero. Thus, a series of short, fine, longitudinal wires lying in a cylindrical surface of the required radius may be used to suppress the metallically-guided mode. These longitudinal wires (16, Fig. 7), may lie inside the wall of the dielectric tube 8. They may coincide with the circular wires 10, in which ease both sets of wires are replaced by a mesh. The wires may be located in the dielectric tube or rod by a process in which the tube or rod is extruded in layers, the wires being sandwiched between the extrusions. Radial wires may also be used for suppressing modes having a radial electric field component.
GB2847264A 1963-08-06 1964-07-10 Improvements in or relating to electromagnetic wave transmission lines Expired GB1078304A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR943907A FR1372611A (en) 1963-08-06 1963-08-06 Transmission line
FR972909A FR85669E (en) 1964-04-30 1964-04-30 Transmission line

Publications (1)

Publication Number Publication Date
GB1078304A true GB1078304A (en) 1967-08-09

Family

ID=26202744

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2847264A Expired GB1078304A (en) 1963-08-06 1964-07-10 Improvements in or relating to electromagnetic wave transmission lines

Country Status (2)

Country Link
DE (1) DE1465930A1 (en)
GB (1) GB1078304A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4792774A (en) * 1987-09-29 1988-12-20 W. L. Gore & Associates, Inc. Dielectric waveguide having higher order mode suppression filters
FR2670954A1 (en) * 1990-12-21 1992-06-26 Thomson Tubes Electroniques HYPERFREQUENCY LOAD USING A FLUID AS ABSORBENT.

Also Published As

Publication number Publication date
DE1465930A1 (en) 1969-01-16

Similar Documents

Publication Publication Date Title
US2812501A (en) Transmission line
GB751153A (en) Improvements in or relating to apparatus for guiding electromagnetic wave energy
US2395560A (en) Wave guide
GB764737A (en) Improvements in or relating to electromagnetic wave transmission systems
GB2089103B (en) High frequency attenuation cable
US3016503A (en) Helix wave guide
US2961619A (en) Microwave filter
US2567210A (en) Ultra-high-frequency attenuator
US2929034A (en) Magnetic transmission systems
US2848695A (en) Electromagnetic wave transmission
US3317863A (en) Variable ferromagnetic attenuator having a constant phase shift for a range of wave attenuation
US2086629A (en) Shielded cable system
US2950454A (en) Helix wave guide
US3573681A (en) Helical waveguide formed from dielectric ribbon having symmetrically disposed conductive strips on opposite sides
US2556881A (en) Negative attenuation amplifier discharge device
GB1078304A (en) Improvements in or relating to electromagnetic wave transmission lines
Yeh Attenuation in a dielectric elliptical cylinder
US2879318A (en) Shield for electric current apparatus
GB1076565A (en) Improvements in or relating to electromagnetic wave transmission lines
US2761915A (en) Helix couplers
US3184695A (en) Circular electric mode filter
SE308545B (en)
US3496497A (en) High-power harmonic suppression filters
US3824504A (en) Microwave filter
US2968775A (en) Electromagnetic wave attenuator