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Defected ground structures (DGS) have known to be serving for the improvement in characteristics of many microwave circuits. Not only DGS has various advantages in the area of microwave power amplifier, Wilkinson power divider, microwave antennas, couplers etc, it is also used in the design of microwave filter to achieve stopband effects, slow-wave effects, frequency adjustment etc. A bandpass filter...
Integrated chip-scale electrodes allow isolated control of resonances and phases in optical multi-cavity system. By varying the round trip length, destructive and constructive intra-cavity interferences are observed, representing all-optical analogue to electromagnetically-induced-transparency and superradiance on-chip.
In this paper we present a low-power frequency synthesizer fabricated as a part of the ultra low-power wireless transceiver system named TELRAN™. The synthesizer consists of an integer-N Phase Locked Loop (PLL), operating in the frequency range 766-850MHz, with automatic tank selection hardware state machine. The System on Chip (SoC) has been fabricated in a 0.13μm CMOS technology. The PLL occupies...
We present the integrated chip-scale tuning of multiple photonic crystal cavities. The optimized implementation allows for large tuning (20K/mW), with deterministic resonance control towards all-optical analogue to electromagnetically-induced-transparency on-chip.
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