Millimeter Wave Microstrip Triplexer.
DEPARTMENT OF THE NAVY WASHINGTON DC
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This patent discloses a planar millimeter wave microstrip triplexer for separating three contiguous bands of frequencies lower, middle and upper bands. The middle band is separated by the use of a diplexer comprising two quadrature couplers connected by dual identical planar bandpass filter sections. A second diplexer comprised of two edge-coupled filter sections is connected to the isolated port of the input quadrature coupler of the first diplexer. Signal components contained in the upper and lower frequency bands appear at the respective outputs of the second diplexer.
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