A 10GHz PHEMT Dielectric Resonator Oscillator

In all microwave systems, oscillators represent the basic microwave energy source. The main problem in oscillator design is the phase noise. This paper will discuss the design and fabrication of a 10GHz parallel feedback type GaAs PHEMT dielectric resonator oscillator. It incorporated an E2000 serie...

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Bibliographic Details
Main Authors: Mahyuddin, N.M., Ain, M.F., Hassan, S.I.S., Singh, M.
Format: Conference Proceeding
Language:English
Subjects:
Dielectric measurements
Dielectric resonator oscillator
Fabrication
Feedback
Gallium arsenide
Microwave oscillators
Noise measurement
Phase measurement
Phase noise
PHEMTs
Q factor
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Summary:In all microwave systems, oscillators represent the basic microwave energy source. The main problem in oscillator design is the phase noise. This paper will discuss the design and fabrication of a 10GHz parallel feedback type GaAs PHEMT dielectric resonator oscillator. It incorporated an E2000 series dielectric resonator from Tekelec Temex with a quality factor of 5000 at 10GHz. The coupling gap between the resonator and the microstrip lines can be adjusted to optimize the ratio of the loaded to the unloaded quality factor to give a better phase noise, where it can be achieved when an insertion loss of 9.5dB is obtained. Phase noise measurement and analysis on the effect of frequency pushing and pulling towards the oscillator has been done using a spectrum analyzer. The dielectric resonator oscillator was measured and exhibited an oscillation at 9.845 GHz with a phase noise of -115.5 dBc/Hz at 100 kHz
DOI:10.1109/RFM.2006.331030