PROJECT TITLE :
X-band low-phase noise oscillator employing substrate integrated waveguide dual-mode filter
A completely unique low-part noise oscillator employing a substrate integrated waveguide (SIW) dual-mode bandpass filter as a frequency stabilisation component at intervals its feedback loop is proposed. The SIW dual-mode filter is implemented primarily based on the employment of the 2 degenerate modes (TE102 and TE201) and includes a larger cluster delay peak than the traditional SIW cavity resonator. By benefiting from the large group delay peak, the phase noise of the oscillator has vital improvement. An X-band oscillator with a GaAs HEMT packaged transistor has been designed and measured. At an oscillation frequency of 9.04 GHz, the measured part noise is -111.nine dBc/Hz at one hundred kHz offset. The output power is half-dozen.1 dBm and also the figure of advantage is -198 dBc/Hz.
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