US3564111A - High frequency transmission line - Google Patents
High frequency transmission line Download PDFInfo
- Publication number
- US3564111A US3564111A US868496A US3564111DA US3564111A US 3564111 A US3564111 A US 3564111A US 868496 A US868496 A US 868496A US 3564111D A US3564111D A US 3564111DA US 3564111 A US3564111 A US 3564111A
- Authority
- US
- United States
- Prior art keywords
- transmission line
- conductor
- high frequency
- strips
- line
- 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
- 230000005540 biological transmission Effects 0.000 title claims description 21
- 239000004020 conductor Substances 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
-
- 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
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
Definitions
- twin-lead transmission lines For this purpose, symmetrical, unshielded high frequency lines, known as twin-lead transmission lines have been used. Such lines have losses and radiation characteristics that are strongly dependent on environmental-influences and weather conditions; particularly when they are mounted on open, flat subsurfaces.
- the radiating, approximately coaxial line also known as the slot line
- the outer conductor envelopes the concentric insulation of the inner conductor over only a portion of the periphery thereof.
- the radiation that results through the slot that remains in the outer conductor gives rise a rapid decrease in field strength with increasing distance from the line.
- a correspondingly large amount of energy must be supplied to the line. This energy, however, is limited by the dimensions of the line.
- the receiver must have high sensitivity, which in turn would increase its reception of noise radiation.
- a further alternative would be to give the high frequency line large dimensions. However, the line would be much heavier, expensive to produce and therefore uneconomical.
- an object of this invention is to provide an improved high frequency transmission line; particularly adapted for transmitting video signals and having a construction which allows for radiation of the high frequency energy in the desired direction without impeding the same.
- Another object of this invention is to provide a transmission line of the character described which includes shielding means such that losses are materially reduced with distance, whereby the distance between receiver and transmitter may be effectively increased or the sensitivity of the receiver may be reduced.
- Still another object of this invention is to provide a transmission line of the character described which comprises tubing of synthetic resin material on which linear and shielding conductors are mounted in specific relationship to each other; the line being mechanically stable under all conditions of installation and use.
- FIG. is a perspective view showing a high frequency transmission line embodying the invention.
- Shielding means generally indicated at 15 is disposed in wall 13 in a position diametrically and symmetrically related to linear conductor 14.
- Shielding means 13 comprises metal strips 16 having a thickness of about 0.1 mm., formed of copper, aluminum or the like and being in edge abutting relation.
- the shielding strips 16, as well a conductor 14 are located in situ during the extrusion of tubingll.
- the strips 16 may be precorrugated as indicated at 17, to afford flexibility to the finished line, particularly when the same is reeled and unreeled.
- the strips l6' may be formed with longitudinally spaced, longitudinal slits, not shown to increase the flexibIlity characteristic of the line.
- the wear conductor 14 may be precorrugated, to aid flexibility.
- the shielding means 13 may extend over an angle of from about to about the same being symmetrically related to the linear conductor 14. Also, the strips 16 may have their edges in slightly spaced relation; or the strips may be replaced by a unitary wide-strip subtending a similar angle.
- the wire 14 may be replaced by stranded conductors, narrow flat conductors, and the like. Also, conductor 14 may be embedded in the wall proper 13 rather than in the rib 12.
- a high frequency transmission line comprising dielectric tubing, a conductor extending longitudinally on a wall portion of said tubing and parallel to the axis thereof, and shielding conductor means extending longitudinally in another wall portion of said tubing and parallel to the axis thereof.
- a transmission line as in claim 1 wherein said shielding means comprises a plurality of metal strips in edge abutting relation to each other.
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Insulated Conductors (AREA)
- Waveguides (AREA)
- Communication Cables (AREA)
Abstract
A line for transmitting high frequency electrical signals, including video signals; the line being used to simultaneously transfer and radiate energy and including shielding means for reducing losses.
Description
United States Patent [72] lnventor Otto Breitenbach Nurnberg, Germany [21 Appl. No. 868,496 [22] Filed Oct. 22, 1969 [45] Patented Feb. 16, 1971 [73] Assignee Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschatt Hannover, Germany a corporation of Germany [32] Priority Oct. 23, 1968 [3 3 Germany [31] P 1,804,679
[54] HIGH FREQUENCY TRANSMISSION LINE 7 Claims, 1 Drawing Fig.
[51] lnt.Cl. ....H0lb 11/06 [50] Field ot'Search 174/32, 36, 113.113.2,115,1l7,117.4,27;333/96 [56] References Cited UNITED STATES PATENTS 1,928,992 10/1933 Clark etal. l74/28UX 2,804,494 8/1957 Fenton l74/27X Primary Examiner- Laramie E. Askin Assistant Examiner-A. T. Grimley Attorney-Philip G- Hilbert ABSTRACT: A line for transmitting high frequency electrical signals, including video signals; the line being used to simultaneously transfer and radiate energy and including shielding means for reducing losses.
PATENIED FEB] 6 I971,
INVENTOR. B 0H0 Breifenbach ATTORNEY It has been proposed to provide transmission lines for transmitting high frequency signals stationary transmitters to mobile receivers or from -mobile transmitters to stationary receivers; more particularly for the transmission of video signals from stationary television camerasto receivers in mobile vehicles. Such lines should conduct the high frequency energy with minimal losses and have the usual radiation characteristic.
For this purpose, symmetrical, unshielded high frequency lines, known as twin-lead transmission lines have been used. Such lines have losses and radiation characteristics that are strongly dependent on environmental-influences and weather conditions; particularly when they are mounted on open, flat subsurfaces.
Also known in the art is the radiating, approximately coaxial line, also known as the slot line, where the outer conductor envelopes the concentric insulation of the inner conductor over only a portion of the periphery thereof. The radiation that results through the slot that remains in the outer conductor, gives rise a rapid decrease in field strength with increasing distance from the line. To achieve sufficient signal strength for the receiver, a correspondingly large amount of energy must be supplied to the line. This energy, however, is limited by the dimensions of the line.
Alternatively, the receiver must have high sensitivity, which in turn would increase its reception of noise radiation. A further alternative would be to give the high frequency line large dimensions. However, the line would be much heavier, expensive to produce and therefore uneconomical.
Accordingly, an object of this invention is to provide an improved high frequency transmission line; particularly adapted for transmitting video signals and having a construction which allows for radiation of the high frequency energy in the desired direction without impeding the same.
Another object of this invention is to provide a transmission line of the character described which includes shielding means such that losses are materially reduced with distance, whereby the distance between receiver and transmitter may be effectively increased or the sensitivity of the receiver may be reduced.
Still another object of this invention is to provide a transmission line of the character described which comprises tubing of synthetic resin material on which linear and shielding conductors are mounted in specific relationship to each other; the line being mechanically stable under all conditions of installation and use. t
DESCRIPTION OF THE DRAWING The single FIG. is a perspective view showing a high frequency transmission line embodying the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS ries embedded therein a longitudinally extending linear conductor 14 such as a wire.
. Shielding means, generally indicated at 15 is disposed in wall 13 in a position diametrically and symmetrically related to linear conductor 14. Shielding means 13 comprises metal strips 16 having a thickness of about 0.1 mm., formed of copper, aluminum or the like and being in edge abutting relation.
The shielding strips 16, as well a conductor 14 are located in situ during the extrusion of tubingll. The strips 16 may be precorrugated as indicated at 17, to afford flexibility to the finished line, particularly when the same is reeled and unreeled. Further, the strips l6'may be formed with longitudinally spaced, longitudinal slits, not shown to increase the flexibIlity characteristic of the line. Also, the wear conductor 14 may be precorrugated, to aid flexibility.
The shielding means 13 may extend over an angle of from about to about the same being symmetrically related to the linear conductor 14. Also, the strips 16 may have their edges in slightly spaced relation; or the strips may be replaced by a unitary wide-strip subtending a similar angle.
The wire 14 may be replaced by stranded conductors, narrow flat conductors, and the like. Also, conductor 14 may be embedded in the wall proper 13 rather than in the rib 12.
lclaim: I q
l. A high frequency transmission line comprising dielectric tubing, a conductor extending longitudinally on a wall portion of said tubing and parallel to the axis thereof, and shielding conductor means extending longitudinally in another wall portion of said tubing and parallel to the axis thereof.
2. A transmission line as in claim 1 wherein-said shielding means is diametrically and symmetrically related to said conductor.
3. A transmission line as in claim 2 wherein said conductor is corrugated along the length thereof.
4. A transmission line as in claim 1 wherein said shielding means comprises a plurality of metal strips in edge abutting relation to each other.
5. A transmission line as in claim 4 wherein said strips are a
Claims (7)
1. A high frequency transmission line comprising dielectric tubing, a conductor extending longitudinally on a wall portion of said tubing and parallel to the axis thereof, and shielding conductor means extending longitudinally in another wall portion of said tubing and parallel to the axis thereof.
2. A transmission line as in claim 1 wherein said shielding means is diametrically and symmetrically related to said conductor.
3. A transmission line as in claim 2 wherein said conductor is corrugated along the length thereof.
4. A transmission line as in claim 1 wherein said shielding means comprises a plurality of metal strips in edge abutting relation to each other.
5. A transmission line as in claim 4 wherein said strips are transversely corrugated along the length thereof.
6. A transmission line as in claim 5 wherein said strips are formed with successive longitudinal slits along the length thereof.
7. A transmission line as in claim 4 wherein said strips extend over an angle of from about 90* to about 120*.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681804679 DE1804679A1 (en) | 1968-10-23 | 1968-10-23 | High frequency line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3564111A true US3564111A (en) | 1971-02-16 |
Family
ID=5711281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US868496A Expired - Lifetime US3564111A (en) | 1968-10-23 | 1969-10-22 | High frequency transmission line |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3564111A (en) |
| BE (1) | BE735384A (en) |
| DE (1) | DE1804679A1 (en) |
| FR (1) | FR2021326A1 (en) |
| NL (1) | NL6912471A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3666877A (en) * | 1971-05-10 | 1972-05-30 | Anaconda Wire & Cable Co | Shielded cable |
| DE2424909A1 (en) * | 1973-05-23 | 1974-12-12 | Communications Patents Ltd | MESSAGE TRANSMISSION SYSTEM AND CABLE FOR IT |
| US5373304A (en) * | 1993-05-27 | 1994-12-13 | Nolan; James F. | Cellular phone antenna reflector |
| US5666125A (en) * | 1993-03-17 | 1997-09-09 | Luxon; Norval N. | Radiation shielding and range extending antenna assembly |
| US5789725A (en) * | 1996-01-15 | 1998-08-04 | The Whitaker Corporation | Radio frequency heat sealing of cable assemblies |
| US6095820A (en) * | 1995-10-27 | 2000-08-01 | Rangestar International Corporation | Radiation shielding and range extending antenna assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1928992A (en) * | 1930-03-03 | 1933-10-03 | Clark Joseph George | Flexible tubing |
| US2804494A (en) * | 1953-04-08 | 1957-08-27 | Charles F Fenton | High frequency transmission cable |
-
1968
- 1968-10-23 DE DE19681804679 patent/DE1804679A1/en active Pending
-
1969
- 1969-06-30 BE BE735384D patent/BE735384A/xx unknown
- 1969-07-22 FR FR6924965A patent/FR2021326A1/fr not_active Withdrawn
- 1969-08-15 NL NL6912471A patent/NL6912471A/xx unknown
- 1969-10-22 US US868496A patent/US3564111A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1928992A (en) * | 1930-03-03 | 1933-10-03 | Clark Joseph George | Flexible tubing |
| US2804494A (en) * | 1953-04-08 | 1957-08-27 | Charles F Fenton | High frequency transmission cable |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3666877A (en) * | 1971-05-10 | 1972-05-30 | Anaconda Wire & Cable Co | Shielded cable |
| DE2424909A1 (en) * | 1973-05-23 | 1974-12-12 | Communications Patents Ltd | MESSAGE TRANSMISSION SYSTEM AND CABLE FOR IT |
| US5666125A (en) * | 1993-03-17 | 1997-09-09 | Luxon; Norval N. | Radiation shielding and range extending antenna assembly |
| US5373304A (en) * | 1993-05-27 | 1994-12-13 | Nolan; James F. | Cellular phone antenna reflector |
| US6095820A (en) * | 1995-10-27 | 2000-08-01 | Rangestar International Corporation | Radiation shielding and range extending antenna assembly |
| US5789725A (en) * | 1996-01-15 | 1998-08-04 | The Whitaker Corporation | Radio frequency heat sealing of cable assemblies |
| US5792988A (en) * | 1996-01-15 | 1998-08-11 | The Whitaker Corporation | Radio frequency heat sealing of cable assemblies |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2021326A1 (en) | 1970-07-24 |
| BE735384A (en) | 1969-12-01 |
| NL6912471A (en) | 1970-04-27 |
| DE1804679A1 (en) | 1970-05-21 |
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