Works (29)

Updated: July 5th, 2023 15:57

2015 journal article

Passive Intermodulation Distortion in Antennas

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 63(2), 474–482.

By: J. Wilkerson n, I. Kilgore n, K. Gard n & M. Steer n

author keywords: Antenna distortion; intermodulation distortion; microstrip patch antenna; nonlinear distortion; passive intermodulation distortion (PIM); two-tone test
topics (OpenAlex): Electrical Contact Performance and Analysis; Copper Interconnects and Reliability; 3D IC and TSV technologies
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Source: Web Of Science
Added: August 6, 2018

2012 journal article

A Highly Linear and Efficient CMOS RF Power Amplifier With a 2-D Circuit Synthesis Technique

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 60(9), 2851–2862.

By: M. Ding n, K. Gard n & M. Steer n

author keywords: Circuit synthesis; CMOS; linearization; power amplifier (PA); RF
topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design; GaN-based semiconductor devices and materials
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Source: Web Of Science
Added: August 6, 2018

2011 journal article

Calibrated non-linear vector network measurement without using a multi-harmonic generator

IET MICROWAVES ANTENNAS & PROPAGATION, 5(5), 616–624.

By: J. Hu n, K. Gard n & M. Steer n

topics (OpenAlex): Radio Frequency Integrated Circuit Design; Advanced Power Amplifier Design; Microwave and Dielectric Measurement Techniques
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Distributed Passive Intermodulation Distortion on Transmission Lines

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 59(5), 1190–1205.

By: J. Wilkerson*, P. Lam n, K. Gard n & M. Steer n

author keywords: Electro-thermal effects; microstrip line; passive intermodulation distortion (PIM); transmission-line model
topics (OpenAlex): Electrical Contact Performance and Analysis; Copper Interconnects and Reliability; Metal and Thin Film Mechanics
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Source: Web Of Science
Added: August 6, 2018

2011 journal article

Non-linear radio frequency model identification using a hybrid genetic optimiser for minimal user intervention

IET MICROWAVES ANTENNAS & PROPAGATION, 5(15), 1880–1890.

By: J. Hu n, J. Lowry n, K. Gard n & M. Steer n

topics (OpenAlex): Control Systems and Identification; Advanced Adaptive Filtering Techniques; Advanced Power Amplifier Design
TL;DR: An adaptive reduced-order procedure for developing grey-box models of radio frequency systems is presented and the stochastic approach, utilisation of incomplete observations and extraction of multiple distinct model candidates enables the insight and intuition of a skilled operator to be used to advantage. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Automated Broadband High-Dynamic-Range Nonlinear Distortion Measurement System

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 58(5), 1273–1282.

By: J. Wilkerson n, K. Gard n & M. Steer n

author keywords: Broadband; dynamic range; measurement; nonlinear vector signal analyzer; passive intermodulation distortion (PIM)
topics (OpenAlex): Electrical Contact Performance and Analysis; Electrostatic Discharge in Electronics; Electrical Fault Detection and Protection
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Behavioural modelling and impact analysis of physical impairments in quadrature modulators

IET MICROWAVES ANTENNAS & PROPAGATION, 4(12), 2144–2154.

By: M. Li*, L. Hoover, K. Gard n & M. Steer n

topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design; Electromagnetic Compatibility and Noise Suppression
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Source: Web Of Science
Added: August 6, 2018

2010 journal article

Intermodulation distortion in narrowband amplifier circuits

IET MICROWAVES ANTENNAS & PROPAGATION, 4(9), 1149–1156.

By: G. Mazzaro n, M. Steer n & K. Gard n

topics (OpenAlex): Radio Frequency Integrated Circuit Design; Semiconductor Lasers and Optical Devices; Microwave Engineering and Waveguides
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Source: Web Of Science
Added: August 6, 2018

2010 journal article

Linear amplification by time-multiplexed spectrum

IET CIRCUITS DEVICES & SYSTEMS, 4(5), 392–402.

By: G. Mazzaro n, K. Gard n & M. Steer n

topics (OpenAlex): Electrical Contact Performance and Analysis; Advanced Power Amplifier Design; Electromagnetic Compatibility and Noise Suppression
TL;DR: The presented technique has the unique property of improving linearity without requiring feedback, feedforward cancellation or calibration, and it is demonstrated that linear recovery is demonstrated for four multiplexed carriers. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2010 journal article

Noise Correlation in Compact Diversity Receivers

IEEE TRANSACTIONS ON COMMUNICATIONS, 58(5), 1426–1436.

By: C. Domizioli n, B. Hughes n, K. Gard n & G. Lazzi n

author keywords: Antenna arrays; mutual coupling; noise; receivers; diversity methods
topics (OpenAlex): Antenna Design and Analysis; Millimeter-Wave Propagation and Modeling; Microwave Engineering and Waveguides
TL;DR: This model shows that noise in a compact diversity receiver may be spatially correlated, and expresses relating noise correlation to properties of the antennas and amplifiers are derived and its impact on the outage probability of an optimal diversity combiner is studied. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2010 journal article

Tanh cascode cell amplifier - an arbitrary transfer characteristics amplifier

Electronics Letters, 46(22), 1495–1496.

By: M. Ding & K. Gard

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Time division multiplexing front-ends for multiantenna integrated wireless receivers

IEEE Transactions on Circuits and Systems. I, Regular Papers, 57(6), 1231–1243.

By: G. Krishnamurthy & K. Gard

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

Characterization of SNDR Degradation in Nonlinear Wireless Transmitters

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, 19(4), 470–480.

By: R. Santos*, N. Carvalho* & K. Gard n

author keywords: power amplifiers; nonlinear systems; long term memory
topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design; PAPR reduction in OFDM
TL;DR: A measurement strategy and a characterization bench are presented for the evaluation of Signal to Noise and Distortion Ratio (SNDR) in nonlinear wireless systems when in presence of memory effects and a closed analysis of the nonlinear mechanisms appearing in communication systems presenting memory is combined. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Filter characterisation using one-port pulsed radio-frequency measurements

IET MICROWAVES ANTENNAS & PROPAGATION, 3(2), 303–309.

By: G. Mazzaro n, M. Steer n & K. Gard n

topics (OpenAlex): Microwave Engineering and Waveguides; Microwave and Dielectric Measurement Techniques; Electromagnetic Compatibility and Measurements
Source: Web Of Science
Added: August 6, 2018

2009 article

Low Distortion Amplification of Multisine Signals Using a Time-Frequency Technique

2009 IEEE/MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM, VOLS 1-3, pp. 901–904.

By: G. Mazzaro n, K. Gard n & M. Steer n

author keywords: Time division multiplexing; time division switching; time-frequency analysis; bandpass filters; passive filters; distortion; amplifier distortion; intermodulation distortion; nonlinear distortion; amplitude modulation
topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design; Electrical Contact Performance and Analysis
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2009 conference paper

Theoretical analysis and characterization of the tunable matching networks in low noise amplifiers

2009 European Conference on Circuit Theory and Design, vols 1 and 2, 890–893.

By: M. Yelten & K. Gard

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Electro-Thermal Theory of Intermodulation Distortion in Lossy Microwave Components

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 56(12), 2717–2725.

By: J. Wilkerson n, K. Gard n, A. Schuchinsky & M. Steer n

author keywords: Compact modeling; electrothermal; fractional calculus; fractional derivative; heat transfer; intermodulation distortion; multiphysics modeling; nonlinear computer-aided design (CAD); passive intermodulation distortion (PIM); thermal model; transient
topics (OpenAlex): Electrical Contact Performance and Analysis; Electronic Packaging and Soldering Technologies; GaN-based semiconductor devices and materials
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Multisine signals for wireless system test and design

IEEE MICROWAVE MAGAZINE, 9(3), 122-+.

topics (OpenAlex): Advanced Power Amplifier Design; Sensor Technology and Measurement Systems; Control Systems and Identification
TL;DR: The multisine approach is well suited for evaluating a nonlinear system excited by real communication signals and allowing for very good laboratory nonlinear distortion measurement setups. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2008 article

Optimal Front-End Design for MIMO Receivers

GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE.

By: C. Domizioli n, B. Hughes n, K. Gard n & G. Lazzi n

topics (OpenAlex): Advanced MIMO Systems Optimization; Antenna Design and Analysis; Antenna Design and Optimization
TL;DR: A circuit model for a noisy MIMO receiver front-end that includes arbitrary coupling and noise correlation is presented, and the noise figure for two-port networks is extended to multiport networks, from which theorems for optimal front- end design are derived. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2008 journal article

Response of RF Networks to Transient Waveforms: Interference in Frequency-Hopped Communications

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 56(12), 2808–2814.

By: G. Mazzaro n, M. Steer n, K. Gard n & A. Walker*

author keywords: Bandpass filters; communication system performance; filter distortion; frequency hop communication; time-frequency analysis; transient response
topics (OpenAlex): Radio Frequency Integrated Circuit Design; Full-Duplex Wireless Communications; Acoustic Wave Resonator Technologies
TL;DR: It is shown that the long-tail response leads to interference in frequency-hopping communication systems and a time-domain closed-form expression of the envelope response is developed. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2007 journal article

Estimation of co-channel nonlinear distortion and SNDR in wireless systems

IET MICROWAVES ANTENNAS & PROPAGATION, 1(5), 1078–1085.

By: K. Gharaibeh*, K. Gard n & M. Steer n

topics (OpenAlex): Advanced Power Amplifier Design; Advanced Adaptive Filtering Techniques; PAPR reduction in OFDM
TL;DR: The analysis is based on the orthogonalisation of the nonlinear behavioual model that allows the accurate estimation of the effective in-band (or co-channel) distortion and hence determination of SNDR. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2007 personal communication

Reality thinking in 'microwave bytes'

By: K. Gard

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

A vector intermodulation analyzer applied to behavioral modeling of nonlinear amplifiers with memory

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 54(5), 1991–1999.

By: A. Walker n, M. Steer n & K. Gard n

author keywords: behavioral modeling; intermodulation asymmetry; intermodulation phase measurement; multislice model; nonlinear memory effects
topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design
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UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Capturing asymmetrical spectral regrowth in RF systems using a MultiSlice behavioral model and enhanced envelop transient analysis

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, 16(4), 400–407.

By: W. Jang n, A. Walker n, K. Gard n & M. Steer n

author keywords: envelope transient simulation; behavioral modeling; WCDMA; spectral regrowth; baseband memory effects
topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design; Electromagnetic Compatibility and Noise Suppression
TL;DR: A new multislice behavioral‐model architecture is presented that captures this asymmetry in RF and microwave systems and can be implemented in a variety of circuit simulators, including SPICE, harmonic balance (HB), envelope transient (ET), and system simulators. (via Semantic Scholar)
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Source: Web Of Science
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2006 journal article

Capturing asymmetry in distortion of an RF system using a multislice behavioral model

IEEE Microwave and Wireless Components Letters, 16(4), 212–214.

By: A. Walker, M. Steer & K. Gard

topics (OpenAlex):
Source: NC State University Libraries
Added: August 6, 2018

2006 article

Discrete Barium Strontium Titanate (BST) thin-film interdigital varactors on alumina: Design, fabrication, characterization, and applications

2006 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-5, pp. 552–555.

By: J. Nath n, W. Fathelbab n, P. Lam n, D. Ghosh n, S. Aygun n, K. Gard n, J. Maria n, A. Kingon n, M. Steer n

author keywords: discrete; varactors; capacitors; BST; ferroelectric; thin-film; Barium Strontium Titanate; bandpass filter; IP3; ACPR; temperature-dependence
topics (OpenAlex): Acoustic Wave Resonator Technologies; Ferroelectric and Piezoelectric Materials; Advanced MEMS and NEMS Technologies
Source: Web Of Science
Added: August 6, 2018

2006 journal article

In-band distortion of multisines

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 54(8), 3227–3236.

By: K. Gharaibeh*, K. Gard n & M. Steer n

author keywords: intermodulation distortion; multisine signals; nonlinear distortion; nonlinear systems; signal analysis; signal representations
topics (OpenAlex): Advanced Power Amplifier Design; Advanced Adaptive Filtering Techniques; Radio Frequency Integrated Circuit Design
TL;DR: A generalized approach for the evaluation of effective in-band distortion in a nonlinear amplifier using multisine excitation is presented, where the output of the nonlinearity is represented as the sum of uncorrelated components by the transformation of a behavioral model. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2006 journal article

Modeling nonlinear distortion of ultra wideband signals at X-band

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 16(6), 381–383.

By: S. Luniya n, K. Gard n & M. Steer n

author keywords: bandpass nonlinearity; nonlinear distortion; spectral regrowth; ultra-wideband (UWB)
topics (OpenAlex): Ultra-Wideband Communications Technology; Gyrotron and Vacuum Electronics Research; Radio Frequency Integrated Circuit Design
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7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2005 article

The impact of RF front-end characteristics on the spectral regrowth of communications signals

Gard, K. G., Larson, L. E., & Steer, M. B. (2005, June). IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Vol. 53, pp. 2179–2186.

By: K. Gard n, L. Larson* & M. Steer n

author keywords: adjacent channel interference; adjacent channel power ratio (ACPR); autocorrelation function; bandpass nonlinearity; behavioral models; cellular radio; code-division multiple-access (CDMA) signal; code division multiple access; complex Gaussian process; correlation; correlation theory; digital radio; digital radio system; digital signals; digitally modulated carrier; Gaussian processes; limiting amplifier; limiting-amplifier model; microwave amplifiers; modulation; nonlinear amplifier; nonlinear distortion; nonlinear transformation; quadrature input signal; RF envelope model; spectral analysis; spectral regrowth; statistical analysis
topics (OpenAlex): Advanced Power Amplifier Design; Radio Frequency Integrated Circuit Design; Electromagnetic Compatibility and Noise Suppression
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Source: Web Of Science
Added: August 6, 2018

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