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In this paper, a wideband push-push VCO using a phase shifter is presented. The phase shifter consists of a 90° branch line hybrid circuit and varactor diodes. The oscillator is a positive feedback type oscillator. In the oscillator, the oscillating frequency can be changed by using the phase shifter as the electrical length of the feedback loops determine the oscillating frequency. The circuit structure...
This paper presents a low noise second harmonic Gunn diode oscillator using square-shaped slot line resonator. A multi-layer MIC technology is adopted to reduce the circuit size of the oscillator. The oscillator consists of Gunn diodes, slot line resonators and microstrip lines. The Gunn diodes are embedded in the slot line resonators. The output circuit is formed using the microstrip line. A second...
In this paper, the 8th harmonic push-push oscillator is firstly presented. A push-push principle is applied in this oscillator. The proposed push-push oscillator consists of two sub-circuits, a microstrip ring resonator, and an output circuit. A simplified circuit configuration is adopted in the proposed oscillator. The microstrip ring resonator plays two roles of a resonator and a power combiner...
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