Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Roger D. Pollard"'
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 56:2340-2347
A novel planar substrate integrated waveguide cavity resonator technique for measurement of complex permittivity is described, which has applications for dielectric measurement systems in the pharmaceutical industry. The high-Q resonant structure is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3decd3656aad2e6c70f5a6a183f1507
https://doi.org/10.1109/tmtt.2008.2003523
https://doi.org/10.1109/tmtt.2008.2003523
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 55:2059-2064
A novel active parametric frequency divider configuration using coupled microstrip transmission lines and two balanced pseudomorphic HEMTs (pHEMTs) is presented. The analysis of the divide-by-2 circuit presented applies the principles of subharmonic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18b8a85f033c51c6c800c8b9ebfdf773
https://doi.org/10.1109/tmtt.2007.906490
https://doi.org/10.1109/tmtt.2007.906490
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 54:3914-3922
With the exception of predistortion, most design methods for microwave filters are based on lossless prototype networks, with the effects of loss generally being considered afterwards, by analysis rather than synthesis. This paper presents new techni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36110498f4df1e5a8cf668d1d3a50593
https://doi.org/10.1109/tmtt.2006.884627
https://doi.org/10.1109/tmtt.2006.884627
Publikováno v:
IEEE Microwave Magazine. 6:46-53
In this article, it has been shown that under certain circumstances, i.e., in a receiver, it is possible to allow microwave filters to have significant passband insertion loss. Systems analysis of various receiver configurations shows that acceptable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbe9d4189f5ef79404b6a51ec2f827bd
https://doi.org/10.1109/mmw.2005.1511913
https://doi.org/10.1109/mmw.2005.1511913
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 51:1150-1156
Device mismatch seriously degrades accuracy in noise figure characterization. The suitability of corrections to the gain definitions for a more precise noise figure evaluation for mismatched devices is investigated and compared to classical technique
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2891e749bc93e5666c8701b2d946d3f
https://doi.org/10.1109/tim.2002.808015
https://doi.org/10.1109/tim.2002.808015
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 50:1334-1342
The rectangular dielectric waveguide (RDWG) technique\ud has been developed for the determination of the dielectric\ud constant of materials from effective refractive index measurements in the Q andWbands. This paper describes the use of an optimizat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb1c297235fd111ec77ed5c8d6c11d7e
https://doi.org/10.1109/19.963207
https://doi.org/10.1109/19.963207
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 48:2630-2636
The first bilateral lightwave network analyzer (BLNA) architecture that is capable of two-port S-parameter measurements is reported in this paper. A combined two-tier calibration is proposed and implemented for electrooptic and optoelectronic measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fdf1c35db9d77016a92bc59026ce886
https://doi.org/10.1109/22.899023
https://doi.org/10.1109/22.899023
Autor:
N. J. Cronin, Roger D. Pollard, S.R. Davies, B.M. Towlson, Robert E. Miles, G.M. Parkhurst, C.E. McIntosh, L.S. Karatzas, John W. Bowen, J.W. Digby, Sillas Hadjiloucas, David Paul Steenson, J.M. Chamberlain
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 48:1293-1302
The fabrication and characterization of micromachined reduced-height air-filled rectangular waveguide components suitable for integration is reported in this paper. The lithographic technique used permits structures with heights of up to 100 /spl mu/
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4f0022e7075a8df6a22c9f82fc94fd8
https://doi.org/10.1109/22.859472
https://doi.org/10.1109/22.859472
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 47:973-978
Constant equivalent noise resistance R/sub n/ circles of a series-feedback amplifier are presented. They visualize on the series-feedback element plane, which is the region where a series feedback can be selected in order to decrease the value of R/s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d46f23d636c1ae5c836bf70de6a4fe72
https://doi.org/10.1109/22.775428
https://doi.org/10.1109/22.775428
Autor:
Roger D. Pollard, S. T. G. Wootton, David Paul Steenson, Robert E. Miles, H. Kazemi, S.R. Davies, J.M. Chamberlain, John W. Bowen, N. J. Cronin
Publikováno v:
International Journal of Infrared and Millimeter Waves. 20:967-974
Schottky barrier diodes have been integrated into on-chip rectangular waveguides. Two novel techniques have been developed to fabricate diodes with posts suitable for integration into waveguides. One technique produces diodes with anode diameters of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e18b1ed766f678c460cc25288c1e707c
https://doi.org/10.1023/a:1021734503826
https://doi.org/10.1023/a:1021734503826