Claims
- 1. A microwave transmission device having a planar stripline conductor coupled between a pair of signal ports, being formed on a ferromagnetic substrate contiguous with a ground plane and having a biasing magnetic field of a predetermined magnitude applied thereto transverse to said ground plane to effect energy travel along at least one edge of said stripline conductor between said signal ports, the improvement comprising:
- a discontinuity in the thickness of the substrate in the region of said one edge whereby an impedance mismatch is produced causing energy traveling along said one edge to be reflected back in the direction from whence it came.
- 2. The device as defined by claim 1 wherein said one edge includes a tapered segment.
- 3. A device as defined by claim 2 wherein said tapered segment substantially defines an exponential taper and wherein said thickness discontinuity is proximally located to said tapered segment.
- 4. The device as defined by claim 1 and additionally including another edge opposite said one edge, said another edge being located proximally to a region of uniform thickness of said substrate away from said thickness discontinuity.
- 5. The device as defined by claim 4 wherein said region of uniform thickness is substantially less than the thickness beyond said discontinuity.
- 6. The device as defined by claim 5 wherein said thickness changes by a factor of substantially six to one.
- 7. The device as defined by claim 1 wherein said one edge includes a tapered segment and said thickness discontinuity is located at said tapered segment, and additionally including another but substantially linear edge opposite said one edge, and
- wherein said thickness discontinuity runs substantially parallel to said another edge.
- 8. The device as defined by claim 7 wherein said tapered segment is located adjacent one of said signal ports, and
- wherein said one edge includes a second tapered segment located adjacent the other of said signal ports.
- 9. The device as defined by claim 8 and additionally including resistive load means coupled to said one edge a selected distance away from said first recited tapered segment for absorbing energy not reflected back to said one signal port, due to the mismatch produced by said thickness discontinuity.
- 10. The device as defined by claim 9 wherein said load means is located adjacent said second tapered segment.
- 11. The device as defined by claim 9 and wherein said load means is located intermediate said tapered segments.
- 12. The device as defined by claim 9 wherein said load means comprises a resistive film.
Government Interests
The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment of any royalties thereon or therefor.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3845413 |
Chiron et al. |
Oct 1974 |
|