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A cost effective realization of optically Self-ILPLL of a state of the art phase locked DRO system at 10GHz in a 19″ rack mountable box is realized with phase noise of −132dBc/Hz at 10 kHz offset carrier. Long optical delay lines of 3km and 5km are respectively used for achieving self-dual phase locking (SPLL) and self-injection locking (SIL) at 10GHz. Phase noise of this DRO is reduced from −83.0dBc/Hz...
Self-injection locked and phase locked loop (SILPLL) using long optical delay has been proposed for phase noise reduction in microwave oscillators. Experiments for both single loop and dual loop SILPLL are performed to demonstrate the phase noise reduction in an electrical VCO. Dual loop configuration provided a phase noise reduction of 71 dB at 300 Hz offset while achieving a lower spurious signal...
Manipulating and tailoring the electromagnetic wave properties of artificial negative index material, known as Metamaterials or left-handed (LH) material foresee inspiring relevance in modern radio communication systems. In particular, this paper addresses the application of left-handed material for building high performance tunable VCO (3.9–4.2 GHz) for the applications in portable and test &...
A novel Mobius-coupled printed resonator oscillators is developed in response to replacing expensive DRO (Dielectric Resonator Oscillator) for the application of synthesized signal sources in RADAR and modern microwave communication systems. One of the problems related to the Dielectric Resonator (DR) is miniaturization at lower microwave frequencies and also fabrication in integrated circuit (IC)...
This paper describes the STPCR (Stubs-Tuned Planar Coupled Resonators) based VCO that offers cost-effective and integrable alternative for DRO (Dielectric Resonator Oscillators) circuits. The measured phase noise is typically −122 dBc/Hz at 100 kHz offset from a 12 GHz with 400 MHz tuning, and 13.8 % DC-to-RF conversion efficiency.
A novel compact coupled planar resonator (CCPR) based VCO (voltage controlled oscillator) was developed in response to expensive high Q resonator (Ceramic, SAW and Dielectric resonators) based signal sources. One of the problem related to the conventional Ceramic/SAW/DR based resonator is integration in IC (Integrated Chip) form. The measured phase noise for a carrier frequency 4.2 GHz CCPR VCO is...
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