GB777341A - Improvements in or relating to microwave channels of magnetically variable electrical length - Google Patents
Improvements in or relating to microwave channels of magnetically variable electrical lengthInfo
- Publication number
- GB777341A GB777341A GB1090454A GB1090454A GB777341A GB 777341 A GB777341 A GB 777341A GB 1090454 A GB1090454 A GB 1090454A GB 1090454 A GB1090454 A GB 1090454A GB 777341 A GB777341 A GB 777341A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mode
- ferrite
- eff
- length
- magnetic field
- 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
Links
- 229910000859 α-Fe Inorganic materials 0.000 abstract 4
- 230000005291 magnetic effect Effects 0.000 abstract 3
- 238000010276 construction Methods 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 230000000644 propagated effect Effects 0.000 abstract 2
- 230000009466 transformation Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 230000005350 ferromagnetic resonance Effects 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C7/00—Modulating electromagnetic waves
- H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas
- H03C7/022—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas using ferromagnetic devices, e.g. ferrites
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P9/00—Delay lines of the waveguide type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Aerials (AREA)
Abstract
777,341. Waveguide accessories. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and BUCKINGHAM, J. March 22, 1955 [April 13, 1954], No. 10904/54. Class 40 (8). [Also in Group XL (c)] A microwave channel of variable electrical length comprises a magnetically polarized length of material exhibiting ferromagnetic resonance through which an electromagnetic wave may be propagated in an E mode, the length of material having at either end mode transformers for transforming the E mode to and from an H mode. The ferromagnetic element may be in the form of a ferrite rod F, Fig. 3, surrounded by a coaxial solenoid MC to which a variable current may be applied. Energy in the H11 mode is fed to and extracted from the element F by waveguides WG1, WG2 transformation between the H mode in the guides and the E mode in the element being effected by probes P1, P2. With this arrangement the flux density due to the axial applied magnetic field and the R.F. magnetic field within the element F will be at right angles to each other and as a result of the gyromagnetic effect, the effective R.F. permeability (eff.Á) of the ferrite will vary with the applied field. The wavelength of the propagated energy in the ferrite is given by #= 1f#eff.Á.K (where K is the dielectric constant) so that large changes in A may be obtained by varying the applied field. In order to obtain satisfactory values flux density and hence of eff. Á, the ferrite element F should have a high length to diameter ratio. The output waveguide WG2 may be replaced by a reflecting plate (Fig. 4, not shown), whereby the wave energy traverses the element F once in either direction and returns to the input guide WG1. In the construction of Fig. 5 transformation between the E and H modes is achieved by tapered end portions of the element F, these portions being several wavelengths long. Impedance matching between the guides WG1, WG2 and the element F may be imposed by arranging or winding the solenoid MC so that the magnetic field diminishes in intensity at one or both ends of the element. In this construction the output guide WG2 may be replaced by a reflector (Fig. 6, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1090454A GB777341A (en) | 1954-04-13 | 1954-04-13 | Improvements in or relating to microwave channels of magnetically variable electrical length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1090454A GB777341A (en) | 1954-04-13 | 1954-04-13 | Improvements in or relating to microwave channels of magnetically variable electrical length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB777341A true GB777341A (en) | 1957-06-19 |
Family
ID=9976430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1090454A Expired GB777341A (en) | 1954-04-13 | 1954-04-13 | Improvements in or relating to microwave channels of magnetically variable electrical length |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB777341A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2936369A (en) * | 1958-08-15 | 1960-05-10 | Hughes Aircraft Co | Ferrite microwave mixer |
| US2998579A (en) * | 1959-04-28 | 1961-08-29 | Raytheon Co | Carrier suppressed ferrite modulator |
| US3108238A (en) * | 1960-03-16 | 1963-10-22 | Bendix Corp | Electrically variable signal changing device using variable permeability material |
| US3131366A (en) * | 1962-09-24 | 1964-04-28 | Jr Samuel Dixon | Gyromagnetic waveguide power limiter having easy axis of ferroxplanar material aligned with magnetic biasing field |
-
1954
- 1954-04-13 GB GB1090454A patent/GB777341A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2936369A (en) * | 1958-08-15 | 1960-05-10 | Hughes Aircraft Co | Ferrite microwave mixer |
| US2998579A (en) * | 1959-04-28 | 1961-08-29 | Raytheon Co | Carrier suppressed ferrite modulator |
| US3108238A (en) * | 1960-03-16 | 1963-10-22 | Bendix Corp | Electrically variable signal changing device using variable permeability material |
| US3131366A (en) * | 1962-09-24 | 1964-04-28 | Jr Samuel Dixon | Gyromagnetic waveguide power limiter having easy axis of ferroxplanar material aligned with magnetic biasing field |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2787765A (en) | Magnetically controlled ferrite phase shifter having birefringent properties | |
| US2728050A (en) | Device for modulating ultra-short waves in a transmission line | |
| GB790017A (en) | Improvements in or relating to travelling wave tubes | |
| US3016495A (en) | Magnetostatic microwave devices | |
| GB833130A (en) | Improvements in or relating to frequency changers for ultra-high frequency electromagnetic waves | |
| US3425003A (en) | Reciprocal digital latching ferrite phase shifter wherein adjacent ferrite elements are oppositely magnetized | |
| GB777341A (en) | Improvements in or relating to microwave channels of magnetically variable electrical length | |
| GB801831A (en) | Improvements in or relating to wave guide switches | |
| Barnes | Broad-band isolators and variable attenuators for millimeter wavelengths | |
| GB836440A (en) | Improvements in or relating to the use of ferrite members in microwave conductors | |
| US3100287A (en) | Phase shifter utilizing variable delay imparted to circularly polarized electric waves by variably magnetized ferrite material | |
| US2760162A (en) | Waveguide amplitude modulator | |
| Tinkham et al. | The excitation of circular polarization in microwave cavities | |
| US3393383A (en) | Electrically controlled surface waveguide phase shifter | |
| US2972122A (en) | Nonreciprocal wave transmission | |
| US3440577A (en) | Microwave shutter | |
| GB2067021A (en) | Differential ferrite phase-shifters for high power microwave signals | |
| Nanda | A New Form of Ferrite Device for Millimeter-Wave Integrated Circuits (Short Papers) | |
| Allen | A microwave magnetometer | |
| US2985851A (en) | Unidirectional waveguide attenuator | |
| US3108238A (en) | Electrically variable signal changing device using variable permeability material | |
| GB803621A (en) | Improvements in or relating to electromagnetic wave devices | |
| US3202945A (en) | Cavity resonator tuned by means of magnetically controlled coaxial ferrite material located in an auxiliary cavity | |
| Cui et al. | 100-MW-level experiments of a gyromagnetic nonlinear transmission line system | |
| US2997673A (en) | Microwave filter |