Post-wall waveguide based short slot directional coupler,...

Details Post-wall waveguide based short slot directional coupler,... Post-wall waveguide based short slot directional coupler,...

2011-07-05

2011-07-05

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S239000

Reexamination Certificate

active

07973616

ABSTRACT:
A short slot directional coupler includes a dielectric substrate having both surfaces each covered by a metal film, a first via-hole string and a second via-hole string, each of which has via-holes penetrating through the substrate, and formed so that a distance between the first via-hole string and the second via-hole string is narrow at a center of a length direction of the string and wider along directions of both ends of the string, and a pair of third via-hole strings each having via-holes penetrating through the substrate, and formed between parts adjacent to both ends of the first via-hole string and parts adjacent to both ends of the second via-hole string to form a first post-wall waveguide along with the first via-hole string and a second post-wall waveguide along with the second via-hole string.

REFERENCES:
Cheng et al., Millimetre-waveguide monopulse antenna incorporating substrate waveguide phase shifter, Feb. 2008, IET Micro. Antennas Propag., 48-52.
Wu et al., The Substrate Integrated Circuits—A new Concept for High-Frequency Electronics and Optoelectronics, Dec. 2003, Microwave Review, 8 pages.
Chen et al., Development of a Low Cost Microwave Mixer Using a Broad-band substrate Integrated Waveguide (SIW) Coupler, Feb. 2006, IEEE, vol. 16 No. 2, 3 pages.
Yamamoto, et al., “A Beam Switching Slot Array with a 4-Way Butler Matrix Installed in Single Layer Post-Wall Waveguides”, IEICE Trans. Commun. Vo. E86-B, No. 5 May 2003, pp. 1653-1659.
Hino, et al., “A Design of Broad-Band Compact H-Plane Directional Couplers”; The Institute of Electronics, Information and Commu8nication Engineers, Dec. 2000, pp. 85-92.

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