Partial dielectric loaded septum polarizer
View Patent ↗In an example embodiment, a waveguide device comprises: a first common waveguide; a polarizer section, the polarizer section including a conductive septum dividing the first common waveguide into a first divided waveguide portion and a second waveguide divided portion; a second waveguide coupled to the first divided waveguide portion of the polarizer section; a third waveguide coupled to the second divided waveguide portion of the polarizer section; and a dielectric insert. The dielectric insert includes a first dielectric portion partially filling the polarizer section. The conductive septum and the dielectric portion convert a signal between a polarized state in the first common waveguide and a first polarization component in the second waveguide and a second polarization component in the third waveguide.
1. A waveguide device comprising:
a first common waveguide;
a polarizer section, the polarizer section including a conductive septum dividing the first common waveguide into a first divided waveguide portion and a second divided waveguide portion, and further including a slot coupling hole within the conductive septum and extending between the first and second divided waveguide portions;
a second waveguide coupled to the first divided waveguide portion of the polarizer section; and
a third waveguide coupled to the second divided waveguide portion of the polarizer section.
2. The waveguide device of claim 1 , wherein the slot coupling hole is surrounded by material of the conductive septum.
3. The waveguide device of claim 1 , wherein the slot coupling hole has a rectangular cross-section.
4. The waveguide device of claim 1 , wherein the slot coupling hole suppresses a propagation mode of a signal within the polarizer section.
5. The waveguide device of claim 4 , wherein the signal includes a first frequency band and a second frequency band, wherein the second frequency band is higher than the first frequency band, and the slot coupling hole suppresses the propagation mode at the second frequency band.
6. The waveguide device of claim 1 , wherein the polarizer section further includes a first asymmetric sidewall feature on a first sidewall of the polarizer section.
7. The waveguide device of claim 6 , wherein the first sidewall is of a first set of opposing sidewalls of the polarizer section, and the first asymmetric sidewall feature does not extend between a second set of opposing sidewalls of the polarizer section.
8. The waveguide device of claim 6 , further comprising a second asymmetric sidewall feature on a second sidewall of the polarizer section.
9. The waveguide device of claim 8 , wherein the first and second asymmetric sidewall feature are mirror images.
10. The waveguide device of claim 6 , the first asymmetric sidewall feature entirely within the polarizer section.
11. The waveguide device of claim 1 , further comprising a dielectric insert including a first dielectric portion partially filling the polarizer section.
12. The waveguide device of claim 11 , wherein the dielectric insert includes a first retention feature, and the waveguide device includes a second retention feature corresponding to the first retention feature.
13. The waveguide device of claim 11 , further comprising an antenna element coupled to the first common waveguide, wherein the dielectric insert includes at least one feature to provide transitioning with the antenna element.
14. The waveguide device of claim 1 , wherein:
the second waveguide corresponds to a first polarization; and
the third waveguide corresponds to a second polarization.