@article{hart_luniya_nath_victor_walker_steer_2007, title={Modelling high-order filters in a transient microwave circuit simulator}, volume={1}, ISSN={["1751-8733"]}, DOI={10.1049/iet-map:20060231}, abstractNote={Transient simulation of narrowband bandpass filters used in microwave circuits is challenging because of matrix ill-conditioning. Here, such filters are modelled as the equivalent discrete-time form developed using a bilinear z-transform. The technique has been implemented in a general purpose transient circuit simulator and validated using a 1.7 GHz 5-section coaxial filter with a 0.9% bandwidth.}, number={5}, journal={IET MICROWAVES ANTENNAS & PROPAGATION}, author={Hart, F. P. and Luniya, S. R. and Nath, J. and Victor, A. and Walker, A. and Steer, M. B.}, year={2007}, month={Oct}, pages={1024–1028} }
 @article{victor_steer_2007, title={Reflection coefficient shaping of a 5-GHz voltage-tuned oscillator for improved tuning}, volume={55}, ISSN={["1557-9670"]}, DOI={10.1109/TMTT.2007.909140}, abstractNote={Negative resistance voltage-controlled oscillators (VCOs) are systematically designed to operate with loaded resonator networks that permit stable steady-state oscillation over a specified tuning bandwidth. Circuit parasitics, however, significantly affect tuning behavior and complicate straightforward design. This paper introduces a scheme that compensates for the effect of parasitics by introducing an embedding network that modifies the effective active device reflection coefficient and thus enables conventional one-port oscillator design techniques to be used. A common-base SiGe HBT VCO operating from 4.4 to 5.5 GHz demonstrates the technique. Phase noise is better than -85 dBc/Hz at 10-kHz offset from the carrier and the second harmonic is less than -20 dBc, while higher order harmonics are less than -40 dBc. The voltage-tuned oscillator demonstrates an oscillator figure-of-merit of at least -182 dBc/Hz over a 800-MHz tuning range. The phase-noise-bandwidth (in megahertz) product is -159 dBc/Hz.}, number={12}, journal={IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES}, author={Victor, Alan and Steer, Michael B.}, year={2007}, month={Dec}, pages={2488–2494} }
 @article{victor_nath_ghosh_boyette_maria_steer_kingon_stauf_2006, title={Noise characteristics of an oscillator with a barium strontium titanate (BST) varactor}, volume={153}, ISSN={["1350-2417"]}, DOI={10.1049/ip-map:20050068}, abstractNote={The phase noise of an oscillator with a thin-film barium strontium titanate (BST) capacitive tuning element, or varactor, is characterised and benchmarked against the same oscillator with a silicon semiconductor junction varactor. Phase noise tracks closely with varactor Q within a specific voltage range as expected. Compared to the semiconductor varactor-based oscillator, the BST-based oscillator demonstrates reduced phase noise degradation near zero volts, but greater phase noise degradation when operated near breakdown.}, number={1}, journal={IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION}, author={Victor, A and Nath, J and Ghosh, D and Boyette, B and Maria, JP and Steer, MB and Kingon, AI and Stauf, GT}, year={2006}, month={Feb}, pages={96–102} }
 @article{victor_steer_2006, title={Transceiver cascade system analysis and design via a contribution method}, volume={16}, ISSN={["1099-047X"]}, DOI={10.1002/mmce.20154}, abstractNote={An approach to the design of cascade receiver and transmitter systems for maximum spurious‐free dynamic range (SFDR) is introduced. The contribution method developed here provides a good initial assignment of noise figure, gain, and linearity requirement to individual stages and enables informed assessment of trade‐offs during system design. Application of the approach to the design of a receiver preselector cascade for maximum SFDR is discussed. © 2006 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2006.}, number={4}, journal={INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING}, author={Victor, Alan M. and Steer, Michael B.}, year={2006}, month={Jul}, pages={338–345} }
 @inproceedings{victor_nath_ghosh_aygun_nagy_maria_kingon_steer_2006, title={Voltage controlled GaN on Si HFET power oscillator using thin?film ferroelectric varactor tuning}, DOI={10.1109/eumc.2006.281206}, abstractNote={A 1.6 GHz power oscillator with a GaN-on-Si heterostructure field effect transistor (HFET) is reported. The voltage-controlled oscillator used a thin-film barium strontium titanate (BST) interdigital varactor as the tuning element. The surface-mount varactor was fabricated using sputtered BST film and copper metallization on alumina. An output power of 1.6 W (32 dBm) is obtained with a DC conversion efficiency of 25.5%. Flat tuning sensitivity of 500 kHz/V, 49 MHz linear frequency tuning, and power flatness of better than 0.5 dB are obtained with 0-100 V tuning voltage. The maximum oscillator phase noise is -81.4 dBc/Hz at 100 kHz offset}, booktitle={Proceedings of the 36th European Microwave Conference, (EuMW2006), Manchester, UK}, publisher={London: Horizon House}, author={Victor, A. and Nath, J. and Ghosh, D. and Aygun, S. and Nagy, W. and Maria, J.-P. and Kingon, A. I. and Steer, M. B.}, year={2006}, pages={87–90} }
 @article{victor_nath_ghosh_boyette_maria_steer_kingon_stauf_2004, title={A voltage controlled oscillator using Barium strontium titanate (BST) thin film varactor}, ISBN={["0-7803-8451-2"]}, DOI={10.1109/rawcon.2004.1389079}, abstractNote={Barium strontium titanate (BST) has a field-dependent permittivity and can be used as a dielectric in voltage tunable capacitors or varactors. These BST-based varactors are passive devices and have significantly different properties compared to semiconductor varactors. A voltage tunable oscillator using a BST thin film varactor was designed and characterized. The frequency of oscillation varied from 34.8 MHz to 44.5 MHz (28% tuning) upon application of 7 V tuning voltage. The VCO gain was 1.38 MHz/V and the 2nd harmonic was over 23 dB below the fundamental throughout the tuning range.}, journal={RAWCON: 2004 IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS}, author={Victor, A and Nath, J and Ghosh, D and Boyette, B and Maria, JP and Steer, MB and Kingon, AI and Stauf, GT}, year={2004}, pages={91–94} }