US2553313A - Band stop filter for electromagnetic waves - Google Patents
Band stop filter for electromagnetic waves Download PDFInfo
- Publication number
- US2553313A US2553313A US638371A US63837145A US2553313A US 2553313 A US2553313 A US 2553313A US 638371 A US638371 A US 638371A US 63837145 A US63837145 A US 63837145A US 2553313 A US2553313 A US 2553313A
- Authority
- US
- United States
- Prior art keywords
- frame
- guide
- axis
- electromagnetic waves
- stop filter
- 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
- 239000004020 conductor Substances 0.000 description 13
- 230000000875 corresponding effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- YYJNOYZRYGDPNH-MFKUBSTISA-N fenpyroximate Chemical compound C=1C=C(C(=O)OC(C)(C)C)C=CC=1CO/N=C/C=1C(C)=NN(C)C=1OC1=CC=CC=C1 YYJNOYZRYGDPNH-MFKUBSTISA-N 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/04—Coaxial resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
Definitions
- This invention relates to band stop filters for electromagnetic waves propagated in the interior of a dielectric conductor and has for its object the provision of an apparatus which, arranged in a conductor of any shape traversed by a suitable wave, permits the transmission of electromagnetic waves over a definite width of band embracing a fixed frequency to be stopped, whilst fully ensuring the transmission of the other frequencies.
- the width of band passing through the filter determines the selectivity of the filter.
- the invention consists essentially in arranging in the interior of the conductor a conductor frame the section and the angular setting or orientation of which may be modified as desired from the exterior, means for adjusting the section and the orientation being, furthermore, provided.
- FIG. 1 illustrates in elevation and in section an apparatus constructed in accordance with the present invention
- Figure 2 is a plan view of Figure 1;
- Figures 3a and 3b are are transmission curves of a conductor provided with an apparatus constructed in accordance with the invention; the curve in Figure 3a is drawn corresponding to the angle of orientation of the frame and the curve in Figure 3b is drawn corresponding to the length of the frame.
- a conductor frame of rectangular profile ABCD is arranged in the interior of the conductor G ( Figures 1 and 2).
- the longitudinal axis of the frame is coaxial with longitudinal symmetrical axis ZOZ' of the upright section of the conductor.
- the frame is carried by rods E and F arranged coaxially with the said axis ZOZ'.
- the upper rod E is provided with a disc N, of a thickness corresponding to that of the wall, and confined, with a certain lateral play, between two other bored discs M and M between which it can rotate and slide slightly.
- the lower rod F is provided with a terminal swivel joint U fitted in a spherical recess carried by the extremity of a threaded rod L constituting an extension of the rod F, and screwing into and through the wall of the conductor G where it terminates outside in a knob B1.
- the length of the frame may be made variable by telescoping the lower part of the frame (whichmay be made of a hollow tube) over the upper fixed part. This sliding action is effected without any change in the orientation of the plane of the frame by means of the threaded screw actuated through the medium of the knob B1.
- a spring K arranged in the interior of the sliding tube, connects the lower and upper parts of the frame, and permits of a displacement corresponding to the threaded length of the screw L.
- the whole of the frame as far as the spherical head U is rotatable about the axis thereof by means of the two toothed wheels 01 and C2.
- the wheel C2 is rotatable about an axis 0' through the medium of a rod L connected to a knob B2 and is operable to rotate the wheel C1 which is connected to the rod E.
- the angle of rotation of the knob 31 which can be read on a scale, denotes the length Z of the frame.
- the indications read on the scales of the said length and angle, together with the curves of variation of the coefiicient of transmission corresponding with the angle of the frame or its length, are employed to determine according to the values chosen, the corresponding coefficient and the band width or, conversely, to determine the angle and the length according to the coefiicient of transmission and the width of band desired.
- a frame having the same cross-sectional shape as the guide taken in a plane perpendicular' to the walls thereof, said frame being tuned to admit the frequency of a given wave among those carried by the guide, and means for varying the angular setting of said frame about an axis contained in the plane thereof and perpendicular tothe wall of the guide.
- a rectangular frame tuned to admit the frequency of a given wave among those carried by the guide, and means for varying, the angular setting of said frame about an axis contained in the plane thereof, parallel to two of the sides thereof andperpendicular tothe walls of the guide.
- a rectangular frame comprising two substantially U-shaped members, one of said members having hollow arms adapted to accommodate telescopically the arms of the other of said members, one of said members being held against translational movement but rotatable about its own axis and having a stem rigid therewith and prolonging said axis through a wall of the guide, an adjustment knob outside the guide opposite said first-mentioned stem, a rotary joint connecting said threaded stem to said other member, internally threaded means connected to the wall. of the guide and threadedly engaging saidthreaded stem,an adjustment knob on the outer. extremity of said threaded stem rotation of which will effect said translational movement and a ust the telescopic relationship of said members, and return springs in said hollow arms yieldablyurging. said members apart in all adjustedxpositions to prevent back-lash.
- a band stopfilteras claimed in claim 7, arranged for a rectangular guide excited in Hot waves comprising a. rectangular frame, one of the symmetrical axes of which is arranged ma normal" section of the guide and according to the axis of this section normal to the electric vector, means mounting the said frame for rotation about the said axis, the two sides of said framewhich are parallel to the said axis being extensible';
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- Control Of Motors That Do Not Use Commutators (AREA)
- Waveguides (AREA)
- Aerials With Secondary Devices (AREA)
Description
y 1951 H. GUTTON ET AL 2,553,313
BAND STOP FILTER FOR ELECTROMAGNETIC wmzs Filed Dec. 29, 1945 H -+1 INVENTOR HENRI GUTTON JEAN ORTUS/ BYW AGENTS Patented May 15, 1951 BAND STOP FILTER FOR ELECTRO- MAGNETIC WAVES Henri Gutton and Jean Ortusi, Paris, France, as-
signors to Compagnie Generale de Telegraphic Sans Fil, a, corporation of France Application December 29, 1945, Serial N 0. 638,371
In France December 14, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires December 14, 1963 8 Claims. (Cl. 17s 44) This invention relates to band stop filters for electromagnetic waves propagated in the interior of a dielectric conductor and has for its object the provision of an apparatus which, arranged in a conductor of any shape traversed by a suitable wave, permits the transmission of electromagnetic waves over a definite width of band embracing a fixed frequency to be stopped, whilst fully ensuring the transmission of the other frequencies. The width of band passing through the filter determines the selectivity of the filter.
The invention consists essentially in arranging in the interior of the conductor a conductor frame the section and the angular setting or orientation of which may be modified as desired from the exterior, means for adjusting the section and the orientation being, furthermore, provided.
The invention will be readily understood by reference to the accompanying drawings which give by way of example one method of carrying the invention into effect. The example of the application of the invention described relates to the case of conductors of rectangular section traversed by a wave of the H01 type, but it will be appreciated by any one skilled in the art that the invention may be adapted to other types of conductors and waves.
In the drawings:
Figure 1 illustrates in elevation and in section an apparatus constructed in accordance with the present invention;
Figure 2 is a plan view of Figure 1; and
Figures 3a and 3b are are transmission curves of a conductor provided with an apparatus constructed in accordance with the invention; the curve in Figure 3a is drawn corresponding to the angle of orientation of the frame and the curve in Figure 3b is drawn corresponding to the length of the frame.
Referring to the drawings, a conductor frame of rectangular profile ABCD is arranged in the interior of the conductor G (Figures 1 and 2). The longitudinal axis of the frame is coaxial with longitudinal symmetrical axis ZOZ' of the upright section of the conductor. The frame is carried by rods E and F arranged coaxially with the said axis ZOZ'. The upper rod E is provided with a disc N, of a thickness corresponding to that of the wall, and confined, with a certain lateral play, between two other bored discs M and M between which it can rotate and slide slightly. The lower rod F is provided with a terminal swivel joint U fitted in a spherical recess carried by the extremity of a threaded rod L constituting an extension of the rod F, and screwing into and through the wall of the conductor G where it terminates outside in a knob B1. The length of the frame may be made variable by telescoping the lower part of the frame (whichmay be made of a hollow tube) over the upper fixed part. This sliding action is effected without any change in the orientation of the plane of the frame by means of the threaded screw actuated through the medium of the knob B1. A spring K, arranged in the interior of the sliding tube, connects the lower and upper parts of the frame, and permits of a displacement corresponding to the threaded length of the screw L.
The whole of the frame as far as the spherical head U is rotatable about the axis thereof by means of the two toothed wheels 01 and C2. The wheel C2 is rotatable about an axis 0' through the medium of a rod L connected to a knob B2 and is operable to rotate the wheel C1 which is connected to the rod E. The angle of rotation of the knob 31 which can be read on a scale, denotes the length Z of the frame. The angle of rotation of the knob B2, also indicated on a dial,
enables the angle 6 from the normal of the plane of the frame with the propagation axis of the conductor to be determined.
The indications read on the scales of the said length and angle, together with the curves of variation of the coefiicient of transmission corresponding with the angle of the frame or its length, are employed to determine according to the values chosen, the corresponding coefficient and the band width or, conversely, to determine the angle and the length according to the coefiicient of transmission and the width of band desired.
The value of the coeflicient of transmission of a wave H01 of frequency N and wavelength may be determined as a function of l and of 0 and there may be traced either the curves T=f1(0) with Z as parameter, or the curves T=f2 (Z) with 0 as parameter.
There are obtained the two groups of curves of the Figures 3a and 3b. In Figure 3a, 01, stands for the angle orientation of the frame when l=Z1+dZ1 and T= /2. And in Figure 31), lo stands for the minimum distance AD when the upper part of the frame extends as far as possible into the hollow tubes of the lower part of the frame and the springs are most compressed.
Assuming that the frame is tuned at Z1 in resonance on the frequency N of wave x, if I is maintained at Z1 curve T=f1 (0) will be that.
marked Z1 on Figure 3a passing through points assaaie ABCDI. On Figure 3b the corresponding points will be abcdi all located on the line 1:11.
If, however, the length of the frame varies. by an amount dli the frame is no longer; tuned to frequency N and even for a value =1r/2 the wave will no longer be completely arrested and curve.
T=f1 (0) will pass through points ABCD'I' on Figure 3a marked Z1+dl1.
On Figure 3b't-he cor responding points will be a'b'cdi' all onthe in a direction perpendicular toyrthe wafls of the guide, a threaded stem prolonging the axis of 1 said other member through a wall of the guide The same procedure can. beapplied to each value of Z giving the curves of Figure 3a. Further'-- more, since points ABCD, A'BM'C'D' etc. correspond to specific valves of 0 (respectively 7r/2,'1r/4,.
1r/5, 1r/l4) by joining on Figure 3b such points as ea, bb, cc, dd etc. the group of. curves ob;-
tained on this figure will also correspond to those valves of 0. The dotted lines connectingthe two figures clearly show how the curves correspond.
Moreover on Figure 3b, the curve for 0:0 will of course correspond to T=1 since the frame'oifers no resistance to the wave in this position.
What we claim is:
1. In a. guide-for ultra-short electro-magnetic waves, a frame having the same cross-sectional shape as the guide taken in a plane perpendicular' to the walls thereof, said frame being tuned to admit the frequency of a given wave among those carried by the guide, and means for varying the angular setting of said frame about an axis contained in the plane thereof and perpendicular tothe wall of the guide.
2. In a guide as claimed in claim 1, means for varying the size of said frame while preserving the shape thereof.
' 3. In a' rectangular guide for ultra-short electromagnetic Waves, a rectangular frame tuned to admit the frequency of a given wave among those carried by the guide, and means for varying, the angular setting of said frame about an axis contained in the plane thereof, parallel to two of the sides thereof andperpendicular tothe walls of the guide.
4. In arectangular guide as claimed in claim 3, means for varying the length of the sides of said frame parallel to said axis.
5. In a rectangular guide excited with waves of the H01 type, a rectangular frame comprising two substantially U-shaped members, one of said members having hollow arms adapted to accommodate telescopically the arms of the other of said members, one of said members being held against translational movement but rotatable about its own axis and having a stem rigid therewith and prolonging said axis through a wall of the guide, an adjustment knob outside the guide opposite said first-mentioned stem, a rotary joint connecting said threaded stem to said other member, internally threaded means connected to the wall. of the guide and threadedly engaging saidthreaded stem,an adjustment knob on the outer. extremity of said threaded stem rotation of which will effect said translational movement and a ust the telescopic relationship of said members, and return springs in said hollow arms yieldablyurging. said members apart in all adjustedxpositions to prevent back-lash.
6. The guide as claimed in claim 1, wherein the saidframe is free of contact with the walls of the guide except at the location therein of the means for varying the angular setting.
7 Aband stop filter for a guide of ultra short.
electromagnetic wavespropagated thereby, com-..
prising a conductor frame of adjustable section and orientation arranged in the interior of the quency, according to the width of the frequency" band to be stopped. 8'. A band stopfilteras claimed in claim 7, arranged for a rectangular guide excited in Hot waves comprising a. rectangular frame, one of the symmetrical axes of which is arranged ma normal" section of the guide and according to the axis of this section normal to the electric vector, means mounting the said frame for rotation about the said axis, the two sides of said framewhich are parallel to the said axis being extensible';
HENRI GUTTON. JEAN ORTUSI.
" REFERENCES CITED The following references are of record in the fileof this patent:
UNITED STATES PATENTS Number Name Date 2,197,123 King Apr. 1 6, 1940" 2,432,093. Fox Dec. 9, 1947
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR870588X | 1943-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2553313A true US2553313A (en) | 1951-05-15 |
Family
ID=9350483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US638371A Expired - Lifetime US2553313A (en) | 1943-12-14 | 1945-12-29 | Band stop filter for electromagnetic waves |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2553313A (en) |
| BE (1) | BE459108A (en) |
| CH (1) | CH250785A (en) |
| DE (1) | DE870588C (en) |
| FR (1) | FR986934A (en) |
| GB (1) | GB594368A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2197123A (en) * | 1937-06-18 | 1940-04-16 | Bell Telephone Labor Inc | Guided wave transmission |
| US2432093A (en) * | 1942-07-30 | 1947-12-09 | Bell Telephone Labor Inc | Wave transmission network |
-
0
- BE BE459108D patent/BE459108A/xx unknown
-
1943
- 1943-12-14 FR FR986934D patent/FR986934A/en not_active Expired
-
1945
- 1945-05-31 GB GB13730/45A patent/GB594368A/en not_active Expired
- 1945-06-29 CH CH250785D patent/CH250785A/en unknown
- 1945-12-29 US US638371A patent/US2553313A/en not_active Expired - Lifetime
-
1950
- 1950-10-01 DE DEC2953A patent/DE870588C/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2197123A (en) * | 1937-06-18 | 1940-04-16 | Bell Telephone Labor Inc | Guided wave transmission |
| US2432093A (en) * | 1942-07-30 | 1947-12-09 | Bell Telephone Labor Inc | Wave transmission network |
Also Published As
| Publication number | Publication date |
|---|---|
| DE870588C (en) | 1953-03-16 |
| FR986934A (en) | 1951-08-07 |
| GB594368A (en) | 1947-11-10 |
| BE459108A (en) | |
| CH250785A (en) | 1947-09-15 |
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