CA2560555A1 - Transformer-free waveguide circulator - Google Patents
Transformer-free waveguide circulator Download PDFInfo
- Publication number
- CA2560555A1 CA2560555A1 CA002560555A CA2560555A CA2560555A1 CA 2560555 A1 CA2560555 A1 CA 2560555A1 CA 002560555 A CA002560555 A CA 002560555A CA 2560555 A CA2560555 A CA 2560555A CA 2560555 A1 CA2560555 A1 CA 2560555A1
- Authority
- CA
- Canada
- Prior art keywords
- ferrite
- waveguide
- circulator
- internal cavity
- ports
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/32—Non-reciprocal transmission devices
- H01P1/38—Circulators
- H01P1/383—Junction circulators, e.g. Y-circulators
- H01P1/39—Hollow waveguide circulators
Abstract
An improved waveguide circulator that eliminates the need for quarter-wave dielectric transformers or impedance steps in the interface waveguide for broadband operation is described. The circulator designs in the prior art all require impedance matching elements outside of the ferrite element in order to achieve acceptable performance. Through the use of this new invention, broadband circulator performance can be achieved without the addition of impedance matching elements in order to minimize the cost, size, mass, and loss of the circulator.
Claims (12)
1. A multi-junction ferrite waveguide circulator, comprising:
a waveguide structure having an internal cavity, the waveguide structure including a plurality of ports extending from the internal cavity, the ports being free from any steps in height or width; and a ferrite element disposed in the internal cavity and having a plurality of legs matching the number of ports, the legs terminating without any quarter wavelength dielectric transformers extending therefrom, the ferrite element being comprised of a ferrite material having a relatively high saturation magnetization value such that waveguide port steps and dielectric transformers can be omitted while still providing good impedance matching.
a waveguide structure having an internal cavity, the waveguide structure including a plurality of ports extending from the internal cavity, the ports being free from any steps in height or width; and a ferrite element disposed in the internal cavity and having a plurality of legs matching the number of ports, the legs terminating without any quarter wavelength dielectric transformers extending therefrom, the ferrite element being comprised of a ferrite material having a relatively high saturation magnetization value such that waveguide port steps and dielectric transformers can be omitted while still providing good impedance matching.
2. The ferrite waveguide circulator of Claim 1 wherein the ferrite element further comprises at least one spacer element.
3. The ferrite waveguide circulator of Claim 1 wherein the ferrite element comprises no separate impedance matching element connected to the ferrite element.
4. The ferrite waveguide circulator of Claim 1 wherein the legs of the ferrite element are provided with dimensions and a ferrite material composition such that an impedance match between a leg and a corresponding circulator port is obtained without any component being attached to the ferrite element.
5. The ferrite waveguide circulator of Claim 1 wherein the legs of the ferrite element are at least 10% thinner and at least 10% taller, in comparison to legs of circulators with dielectric transformers, while still achieving good signal transfer with low loss and signal reflection.
6. The ferrite waveguide circulator of Claim 1 wherein a broadband impedance match is obtained of greater than a 15% frequency range over which the return loss is greater than 23 dB.
7. The ferrite waveguide circulator of Claim 1 further comprising empirical impedance matching elements disposed on the surface of the waveguide structure.
8. A ferrite circulator, comprising:
a waveguide structure having an internal cavity, the waveguide structure including a plurality of ports extending from the internal cavity; and a ferrite element disposed in the internal cavity, and wherein a broadband impedance match of greater than a 15% frequency range over which the return loss is greater than 23 dB is achieved without utilizing dielectric transformers or steps in the height and/or width of the waveguide structure.
a waveguide structure having an internal cavity, the waveguide structure including a plurality of ports extending from the internal cavity; and a ferrite element disposed in the internal cavity, and wherein a broadband impedance match of greater than a 15% frequency range over which the return loss is greater than 23 dB is achieved without utilizing dielectric transformers or steps in the height and/or width of the waveguide structure.
9. The ferrite circulator according to Claim 8, further comprising at least one empirical matching element disposed within the internal cavity.
10. The ferrite circulator according to Claim 8, wherein the at least one ferrite element is Y-shaped.
11. A switch assembly comprising:
a plurality of multi junction ferrite waveguide circulators, each circulator comprising:
a waveguide structure having an internal cavity, the waveguide structure including a plurality of ports extending from the internal cavity, the ports being free from any steps in height or width; and a ferrite element disposed in the internal cavity and having a plurality of legs matching the number of ports, the legs terminating without any quarter wavelength dielectric transformers extending therefrom, the ferrite element being comprised of a ferrite material having a relatively high saturation magnetization value such that waveguide port steps and dielectric transformers can be omitted while still providing good impedance matching.
a plurality of multi junction ferrite waveguide circulators, each circulator comprising:
a waveguide structure having an internal cavity, the waveguide structure including a plurality of ports extending from the internal cavity, the ports being free from any steps in height or width; and a ferrite element disposed in the internal cavity and having a plurality of legs matching the number of ports, the legs terminating without any quarter wavelength dielectric transformers extending therefrom, the ferrite element being comprised of a ferrite material having a relatively high saturation magnetization value such that waveguide port steps and dielectric transformers can be omitted while still providing good impedance matching.
12. A switch as claimed in Claim 11 wherein some of the ports of the waveguide structures are provided with absorptive loads associated directly therewith without any dielectric transformers positioned between the ports and the absorptive loads.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55431604P | 2004-03-18 | 2004-03-18 | |
| US60/554,316 | 2004-03-18 | ||
| PCT/US2005/009401 WO2005114775A1 (en) | 2004-03-18 | 2005-03-18 | Transformer-free waveguide circulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2560555A1 true CA2560555A1 (en) | 2005-12-01 |
| CA2560555C CA2560555C (en) | 2012-12-18 |
Family
ID=35428634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2560555A Expired - Fee Related CA2560555C (en) | 2004-03-18 | 2005-03-18 | Transformer-free waveguide circulator |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1730808A4 (en) |
| CA (1) | CA2560555C (en) |
| WO (1) | WO2005114775A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8957741B2 (en) * | 2013-05-31 | 2015-02-17 | Honeywell International Inc. | Combined-branched-ferrite element with interconnected resonant sections for use in a multi-junction waveguide circulator |
| US9263783B2 (en) | 2014-01-21 | 2016-02-16 | Honeywell International Inc. | Waveguide circulator having stepped floor/ceiling and quarter-wave dielectric transformer |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341789A (en) * | 1965-04-19 | 1967-09-12 | Bendix Corp | Latching ferrite circulator having the ferrite symmetrically located with respect toeach rf signal carrying arm |
| US3935548A (en) * | 1974-06-04 | 1976-01-27 | The Washington University | Wide-band microwave circulator |
| JPS5821846B2 (en) * | 1975-04-09 | 1983-05-04 | 日本電気株式会社 | Hikagiyaku Cairo |
| JPS52152145A (en) * | 1976-06-14 | 1977-12-17 | Mitsubishi Electric Corp | Latching circulator |
| US4058780A (en) * | 1976-08-02 | 1977-11-15 | Microwave Development Labs., Inc. | Waveguide circulator |
| US4697158A (en) * | 1986-04-15 | 1987-09-29 | Electromagnetic Sciences, Inc. | Reduced height waveguide circulator |
| US4791389A (en) * | 1987-05-27 | 1988-12-13 | Varian Associates, Inc. | Millimeter wave circulator |
| EP1444750B1 (en) * | 2001-11-07 | 2010-04-07 | EMS Technologies, Inc. | Multi-junction waveguide circulator without internal transitions |
| JP3665776B2 (en) * | 2002-08-09 | 2005-06-29 | アルプス電気株式会社 | Non-reciprocal circuit device and communication device using the same |
-
2005
- 2005-03-18 CA CA2560555A patent/CA2560555C/en not_active Expired - Fee Related
- 2005-03-18 WO PCT/US2005/009401 patent/WO2005114775A1/en active Application Filing
- 2005-03-18 EP EP05726000A patent/EP1730808A4/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CA2560555C (en) | 2012-12-18 |
| EP1730808A4 (en) | 2008-09-03 |
| EP1730808A1 (en) | 2006-12-13 |
| WO2005114775A1 (en) | 2005-12-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20200831 |