US 12,249,747 B2
Non-contacting waveguide flange adapter element having quasi-periodic protruding elements configured to pass waves in one direction and stop waves in other directions
Simon Carlred, Västra Frölunda (SE); Esperanza Alfonso Alós, Västra Frölunda (SE); and Per-Simon Kildal, Pixbo (SE)
Assigned to GAPWAVES AB, Gothenburg (SE)
Filed by GAPWAVES AB, Gothenburg (SE)
Filed on Nov. 20, 2023, as Appl. No. 18/513,706.
Application 18/513,706 is a continuation of application No. 17/156,702, filed on Jan. 25, 2021, abandoned.
Application 17/156,702 is a continuation of application No. 16/098,856, abandoned, previously published as PCT/SE2016/050387, filed on May 3, 2016.
Prior Publication US 2024/0204383 A1, Jun. 20, 2024
Int. Cl. H01P 1/04 (2006.01); H01P 5/02 (2006.01)
CPC H01P 1/042 (2013.01) [H01P 5/024 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An arrangement for interconnecting waveguide components, comprising:
a waveguide flange adapter element having a first waveguide opening and being configured to provide an interconnection between first and second waveguide structures;
a first waveguide flange of the first waveguide structure having a second waveguide opening;
the waveguide flange adapter element comprising a first surface of a conductive material with a periodic or quasi-periodic structure formed by a number of protruding elements surrounding the first waveguide opening, the protruding elements extending from the first surface and having outer ends spaced from the first surface;
an interconnector configured to releasably or fixedly interconnect the waveguide flange adapter element to the first waveguide flange without requiring electrical contact and to provide a first gap between a second surface around the first waveguide opening and the second waveguide opening and provide a second gap between the first surface and a third surface around the second waveguide opening assuring that the first surface is not in direct mechanical contact with the third surface of the first waveguide flange, wherein the number of protruding elements surrounding the first waveguide opening allow waves to pass across the first gap in a desired direction or waveguide path, at least in an intended frequency band of operation, and that stop propagation of waves in the first gap in other directions;
wherein the second gap is smaller than λ/4, where λ is a wavelength in a medium surrounding the protruding elements of a waveguide signal to be measured, the interconnector comprises a rim or a ridge extending from the first surface and at least partly surrounding the periodically or quasi-periodically arranged protruding elements to provide the second gap, wherein the rim or ridge is arranged to extend from the first surface beyond the outer ends of the protruding elements, hence assuring that the outer ends of the protruding elements do not come in direct mechanical contact with the first waveguide flange; and
wherein the waveguide flange adapter element comprises alignment pin holes substantially symmetrically disposed around, and at a distance from, the first surface, and the waveguide flange adapter element being aligned with respect to the first waveguide flange by alignment pins introduced into the alignment pin holes and into cooperating pin holes in the first waveguide flange to interconnect the waveguide flange adapter element to the first waveguide flange.