YONG-CHAE JEONG Chonbuk National University Chonju, Korea SI-GYUN JEONG Samsung Electronics Gyeonggi-Do, Korea JONG-SIK LIM Korean Intellectual Property Office (KIPO) Daejeon, Korea CHUL-DONG KIM Sewon Teletech Inc. Kyeonggi-Do, Korea Recently, extensive research efforts on photonic band gap (PBG) structures where periodic patterns are etched on the ground plane of microstrip lines have been co...

We report on the development of W-band (75–110 GHz) heterodyne receiver technology for large-format astronomical arrays. The receiver system is designed to be both mass producible, so that the designs could be scaled to thousands of receiver elements, and modular. Most of the receiver functionality is integrated into compact monolithic microwave integrated circuit (MMIC) amplifier-based multich...

We report planar integration of tapered terahertz (THz) frequency quantum cascade lasers (QCLs) with metasurface waveguides that are designed to be spoof surface plasmon (SSP) out-couplers by introducing periodically arranged SSP scatterers. The resulting surface-emitting THz beam profile is highly collimated with a divergence as narrow as ~4° × 10°, which indicates a good waveguiding property ...

This paper introduces a CMOS-microfluidics integration scheme for electrochemical microsystems. A CMOS chip was embedded into a micro-machined silicon carrier. By leveling the CMOS chip and carrier surface to within 100 nm, an expanded obstacle-free surface suitable for photolithography was achieved. Thin film metal planar interconnects were microfabricated to bridge CMOS pads to the perimeter ...

Monolithic integrated lumped planar transformers were introduced more than ten years ago. We present a comprehensive review of the electrical characteristics which results in an accurate lumped low-order equivalent model. Amplifiers, mixers and Meissner-type voltage controlled oscillators using monolithic transformers have been published a few years ago. For the first time, integrated transform...

”SuperMix” is a software library written to aid in the calculation and optimization of the signal and noise performance of high-frequency circuits, especially those including superconductors and superconducting tunnel junctions. Using this library, C++ programs can be written to simulate circuits of arbitrary size, complexity, and topology. The library includes an optimizer which can minimize a...

This report presents the design and simulation results of an UWB receiver analog front-end (AFE) which consists of a broadband low-noise amplifier (LNA), mixers, variable gain amplifiers (VGA), and anti-aliasing filters for I and Q channel. The receiver chain is designed to down-convert and amplify three 500MHz bands spanning from 3.2GHz to 4.7GHz. The gain can be varied from 12dB to 55dB, with...

This paper describes a 2.4 GHz passive switch mixer and a 5/2.5 GHz voltage-controlled negative Gm oscillator (VCO) with an inversion-mode MOS varactor. Both circuits are implemented using a 1P8M 0.13 μm process. The switch mixer has an input referred 1 dB compression point of −3.89 dBm and a conversion gain of −0.96 dB when the local oscillator power is +2.5 dBm. The VCO consumes only 1.75 mW,...

A CMOS quadrature down-converter for a direct-conversion receiver of 5.15-5.825GHz wireless LAN is described. The down-converter consists of two sub-harmonic mixers, for I and Q channels, and an LO generation network. In order to prevent the low-frequency component generated by the even-order distortion of the transconductance stage from being leaked to the mixer output, transconductance and sw...

Multiplier is an important block of wireless communication system. In many applications there is a need to mix the signals of different frequencies or signals of different types, which emphasises the use of mixers or multipliers for different RF applications. MOS analog multiplier with less number of transistors which can operate at ISM Band frequency with high linearity is proposed. An ISM ban...