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A rectangular tem waveguide with photonic crystal walls for excitation of quasi-optical amplifiers

Thin photonic crystal substrates are used to produce a TEM mode in a rectangular waveguide. Hexagonal pads arranged in honeycomb lattice and connected to the ground plane by substrate vias form the photonic crystal waveguide walls. Measurements on a Ku-band waveguide with two photonic crystal sidewa...

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Bibliographic Details
Main Authors: Kim, M., Hacker, J.B., Sailer, A.L., Kim, S., Sievenpiper, D., Higgins, J.A.
Format: Conference Proceeding
Language:English
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Summary:Thin photonic crystal substrates are used to produce a TEM mode in a rectangular waveguide. Hexagonal pads arranged in honeycomb lattice and connected to the ground plane by substrate vias form the photonic crystal waveguide walls. Measurements on a Ku-band waveguide with two photonic crystal sidewalls showed a Field Flatness Efficiency (FFE) of better than 80% between 14.9 and 15.4 GHz, a substantial increase compared to the 50% of conventional rectangular waveguide. Simulations of a striped photonic crystal show similar behavior with additional property that it is also possible to use the crystal on top and bottom walls. Such a waveguide could support dual cross-polarized TEM modes by preventing only the longitudinal magnetic fields at the crystal surface.
ISSN:0149-645X
DOI:10.1109/MWSYM.1999.779820