Probe coupled, multi-band combiner/divider

Details Probe coupled, multi-band combiner/divider Probe coupled, multi-band combiner/divider

1998-03-13

2000-04-04

Wong, Don

Communications: radio wave antennas

Antennas

Wave guide type

343772, 343786, 333126, 333135, H01Q 1300

Patent

active

060467029

ABSTRACT:
A passive microwave device combines energy from two microwave communication frequency bands into a common waveguide. Reciprocally, the device separates energy from two microwave frequency bands carried in a common waveguide into separate waveguides for each frequency band. The coupling is accomplished by means of probes that pass between the waveguides. The device can be used for the combination/separation of energy in the X-band and the Ku-band, wherein the Ku-band energy is coupled into/out of a square common waveguide by means of symmetrically positioned coaxial RF coupling probes. The coupling probes extend into both the common waveguide and also into rectangular Ku-band only waveguides. The X-band and Ku band are thus combined and/or separated passively for dual or multi-band antenna feeds in a compact, low cost package. The common waveguide is constructed to include a filter that substantially attenuates any Ku-band energy that would otherwise propagate towards the X-band input/output port. The filter is constructed with symmetrically arrayed ridges or posts that extend into the common waveguide. The combiner/divider device provides extremely broad band passive coupling over the commonly used X and Ku satellite communication frequency bands.

REFERENCES:
patent: 4491810 (1985-01-01), Saad
patent: 4912436 (1990-03-01), Alford et al.
patent: 5874923 (1999-02-01), Nilsson et al.
patent: 5907309 (1999-05-01), Anderson et al.
patent: 5910754 (1999-06-01), Simpson et al.
"13 Meter C/Ku Dual Frequency Band Earth Station Antenna", Mitsuyoshi Iida NEC Res. & Develop., No. 99, Oct. 1990, pp. 98-112.
"A Network for Combining Radio Systems at 4, 6 and 11 knc", Earl T. Harkless, The Bell System Technical Journal, Sep. 1959, pp. 1253-1267.

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