Apparatus and methods for constructing and packaging waveguide to planar transmission line transitions for millimeter wave applications
AssigneeInternational Business Machines Corporation
InventorsBrian P. Gaucher, Janusz Grzyb, Duixian Liu, Ullrich R. Pfeiffer, Thomas M. Zwick
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Abstract
Apparatus and methods are provided for constructing waveguide-to-transmission line transitions that provide broadband, high performance coupling of power at microwave and millimeter wave frequencies. More specifically, exemplary embodiments of the invention include wideband, low-loss and compact coplanar waveguide-to-rectangular waveguide transition structures and asymmetric coplanar stripline (or coplanar stripline)-to-rectangular waveguide transition structures that are particularly suitable for microwave and millimeter wave applications.
Claims14
A transition apparatus, comprising:
- a transition housing comprising a rectangular waveguide channel and an aperture disposed through a broad wall of the rectangular waveguide channel;
- a substrate having a first surface and a second surface opposite the first surface, and a transmission line and a probe disposed on the first surface, wherein the transmission line comprises a first conductive strip and a second conductive strip, wherein the probe is connected to, and extends from, an end of the first conductive strip, and wherein an end of the second conductive strip is terminated by a stub, and wherein the stub is connected to a conductive ground pattern on the second surface of the substrate by edge-wrap metallization, wherein the substrate is positioned in the aperture such that the probe protrudes into the rectangular waveguide channel and wherein the ends of the first and second conductive strip-terminate at an inner surface of the broad wall of the rectangular waveguide channel, wherein the aperture has a stepped-width opening to enable alignment and positioning of the substrate in the aperture and the rectangular waveguide channel.
Dependencies are inferred from the claim text.