Microwave multiplexer with multimode filter
CA 1282881 C · Owner: Hudspeth, Thomas · Inventors: Hudspeth, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microwave multiplexer (20) has a set of independently tunable signal channels coupled to a common waveguide (22). Each of the channels has input and output 3dB couplers (40, 106) which are joined by cylindrical radiators (32, 34) carrying circularly polarized waves. Both TE and TM waves are propagated within a plurality of resonant cavities (36 38) within, each of the filters (32, 34). Coupling between the cavities (36, 38) is provided by an array of slots (88) and an array of probes (90) wherein the slots (88) couple TE waves and the probes (90) couple TM waves. Adjustment of the slots (88) and the probes (90) provides for independent coupling coefficients for the two propagation modes. …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.