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Research and development on the next generation wireless systems, namely 5G, has experienced explosive growth in recent years. In the physical layer, the massive multiple-input-multiple-output (MIMO) technique and the use of high GHz frequency bands are two promising trends for adoption. Millimeter-wave (mmWave) bands, such as 28, 38, 64, and 71 GHz, which were previously considered not suitable for...
In this paper, we propose a radio front end for future 5G mobile devices and present the design and verification of two fundamental voltage-controlled oscillators (VCO) working at potential 5G carrier frequencies. Based on two types of very small on-chip inductors with high quality factor, two LC-VCOs are fabricated and tested in a 130nm CMOS process. With a C-shaped on-chip inductor, VCO 1 achieves...
In this paper, two wideband K-band LC-tank VCOs for next generation wireless communication applications are designed, fabricated, and verified in a 0.13-μm CMOS process. A thorough comparison study of 12% tuning-range SS-VCO and 9.49% DS-VCO is conducted based on the measurement results and calculations of figure-of-merits (FoM) and FoMT. The measured phase noise of SS-VCO at 22.29 GHz carrier frequency...
This paper presents a prototype 3.1–8.2 GHz UWB transmitter front-end based on a novel transmitted reference pulse cluster (TRPC) scheme in the 0.13-µm CMOS process. The transmitter front-end consists of wideband low noise active baluns, IQ modulator based on noise-cancellation mixers with high linearity, and differential to single-ended (D-to-S) converter. The measurements show that the worst-case...
This paper presents a wideband LC quadrature voltage controlled oscillator (VCO) for novel TRPC-UWB transceiver in 0.13 µm CMOS technology. Based on series coupling structure, and through combining the advanced switched capacitor and MOS varactor techniques, this QVCO's continuous frequency tuning range covers from 5.05 to 5.84 GHz. The measured phase noise at 1 MHz offset from a 5.1 GHz carrier achieves...
This paper presents a low-cost wideband 60-GHz on-chip Artificial Magnetic Conductor (AMC) Yagi antenna utilizing a standard 0.13-µm CMOS process. The stand-alone Yagi antenna is designed based on a four-element topology in coplanar waveguide (CPW), using the top thick metal and metal layer M2. Furthermore, by designing and integrating an optimized AMC plane, which has a very wide fractional bandwidth...
PLL (Phase Locked Loop) based frequency synthesizers are widely used in the wireless communication field. This paper puts focus on the design and implementation of a 60dB SNR (Signal to Noise Ratio) FM transmitter, which realizes direct frequency modulation of audio signal by utilizing a carrier frequency ranging from 78MHz to 108MHz, with a 100 kHz channel selection resolution. Fabricated in standard...
This paper presents a prototype of multi-mode, multi-band CMOS VCO with a switched-transformer resonator, designed and fabricated in 90nm CMOS process. By combining the characteristics of switched-capacitors VCOs, transformer-based VCOs and switched-inductor VCOs, five VCO operation modes were realized, achieving a measured 76% tuning range spanning the bands 2.32-3.36 GHz, 3.45-4.55 GHz, and 4.89-5...
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