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Design Of Analog Cmos Integrated Circuits

In general, Micropower Impulse Radar (MIR) depends on Ultra-Wideband (UWB) transmission systems. UWB technology can supply innovative new systems and products that have an obvious value for radar and communications uses. Important applications include bridge-deck inspection systems, ground penetrating radar, mine detection, and precise distance resolution for such things as liquid level measurement. Most of these UWB inspection and measurement methods have some unique qualities, which need to be pursued. Therefore, in considering changes to Part 15 the FCC needs to take into account the unique features of UWB technology. MIR is applicable to two general types of UWB systems: radar systems and communications systems. Currently LLNL and its licensees are focusing on radar or radar type systems. LLNL is evaluating MIR for specialized communication systems. MIR is a relatively low power technology. Therefore, MIR systems seem to have a low potential for causing harmful interference to other users of the spectrum since the transmitted signal is spread over a wide bandwidth, which results in a relatively low spectral power density.

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Response to FCC 98-208 notice of inquiry in the matter of revision of part 15 of the commission's rules regarding ultra-wideband transmission systems

Resonance conditions for a substrate-superstrate printed antenna geometry which allow for large antenna gain are presented. Asymptotic formulas for gain, beamwidth, and bandwidth are given, and the bandwidth limitation of the method is discussed. The method is extended to produce narrow patterns about the horizon, and directive patterns at two different angles.

Gain enhancement methods for printed circuit antennas

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Design Of Integrated Circuits For Optical Communications

This expanded and thoroughly revised edition of Thomas H. Lee's acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems. The chapters on low-noise amplifiers, oscillators and phase noise have been significantly expanded as well. The chapter on architectures now contains several examples of complete chip designs that bring together all the various theoretical and practical elements involved in producing a prototype chip. First Edition Hb (1998): 0-521-63061-4 First Edition Pb (1998); 0-521-63922-0

The Design of CMOS Radio-Frequency Integrated Circuits: RF CIRCUITS THROUGH THE AGES

This paper presents stochastic convergence analysis of particle swarm optimization algorithm involving randomness and applying the results to the Analog RF Circuits to optimize the circuit parameters. In every iteration, each particle position is represented as vector and the standard particle swarm algorithm determined by positive real tipple {w,c 1 ,c 2 }. Comparisons for convergence are presented with respect to fixed tipple {w,c 1 ,c 2 } and random tipple {w,c 1 ,c 2 }. Various results show that the randomness in defining new position to particle leads to better convergence property. Also, exploration and exploitation trade off are discussed with examples. It is demonstrated that each particle undergoes both exploration and exploitation in convergence process; if the randomness in the particle generation is considered. The parameters considered for RF circuit are cutoff frequency, Phase Noise and Signal to Noise Ratio (SNR). Results are compared between both fixed values and random values of parameters in convergence analysis of PSO.

Optimization of Analog RF Circuit parameters using randomness in particle swarm optimization

In this paper, a reconfigurable antenna utilizing the property of negative permeability of split ring resonators is proposed for band notched UWB and narrow band applications. The proposed design yield the resonant frequency of the narrow band operation and notch frequency of UWB operation coinciding at 5.8 GHz frequency. The proposed antenna is simulated and measured. Radiation efficiency of 80% and 50% is observed for the UWB and the narrow band operation, respectively.

Design of SRR loaded reconfigurable antenna for UWB and narrow band applications

A compact, ultra-wideband monopole antenna with triple band-notch characteristic is presented. Proposed antenna consists of an elliptical radiator for achieving UWB bandwidth. For rejecting WiMAX (3.3-3.6 GHz) and WLAN (5.15-5.3 GHz, 5.7-5.825 GHz) bands, antenna is loaded with Non-concentric open ended rings. The effective lengths for these non-concentric rings are approximately half wavelength for the respective notch frequencies. Overall surface dimension of the fabricated antenna is 25×18 mm2. The proposed antenna is simulated, fabricated and tested experimentally for its performance. A good agreement between simulated and experimental results ensures the suitability of the proposed antenna for various UWB applications.

Compact printed monopole UWB antenna loaded with non — Concentric open — Ended rings for triple band — Notch characteristic

In this paper, a novel Hemispherical Dielectric Resonator Antenna (HDRA) with a rectangular slot and rectangular shaped Defected Ground Structure (DGS) is proposed and investigated. A total of three slots are etched as DGS. The central slot is a pierce through slot, protruding from the ground plane to the HDRA. In doing so, the bandwidth of operation increases from 10.4% to 23% (S11 <; -10 dB) with a gain of 5.85 dBi at the fundamental resonant frequency. The fundamental frequency of resonance is 2 GHz which excites the TE111 mode in the HDRA. Further, the effect of DGS modifies the current distribution on the ground which leads to very low cross polar power levels in the radiation pattern.

A novel Hemispherical Dielectric Resonator Antenna with rectangular slot and Defected Ground Structure for low cross polar and wideband applications

A novel, compact, multiple band notch filter and dual-band filters are presented. Contiguous and concentric split ring resonators (SRRs) and Ring resonator are used to achieve desired multiple narr...

Jayanta Mukherjee

Papers

Optimization of Analog RF Circuit parameters using randomness in particle swarm optimization

Design of SRR loaded reconfigurable antenna for UWB and narrow band applications

Compact printed monopole UWB antenna loaded with non — Concentric open — Ended rings for triple band — Notch characteristic

A novel Hemispherical Dielectric Resonator Antenna with rectangular slot and Defected Ground Structure for low cross polar and wideband applications

Multiple band notch and Dual-Band filter using concentric and contiguous split ring resonators (CCSRR)