Unequal Stub Length Diplexing Microwave Frequency Discriminator Circuit.
Patent, Filed 18 Jan 91, patented 14 Jan 92,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A microwave frequency discriminator circuit useful as a frequency linearization device includes a microstrip input conductor and a pair of microstrip output conductors, a pair of resistors, a pair of microstrip transmission line diplexer stubs of unequal lengths, a pair of detector diodes, and a quad of microstrip filter stubs. Each resistor at one end is connected to the same end of the input conductor and in parallel relation to one another. Each diplexer stub at one end is connected to an opposite end of one resistor and in parallel relation to one another. Each diplexer stub is open-circuited at an opposite end. Each detector diode at one end is connected to the one end of one stub and at an opposite end to one output conductor. The filter stubs are interposed in spaced pairs in one output conductor.
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