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6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)最新文献

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Investigations into the use of SU-8 in the fabrication of a micro-optical bench for hybrid optoelectronic integration and packaging SU-8在混合光电集成与封装微光学平台制造中的应用研究
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962192
N. Farrington, S. Iezekiel
{"title":"Investigations into the use of SU-8 in the fabrication of a micro-optical bench for hybrid optoelectronic integration and packaging","authors":"N. Farrington, S. Iezekiel","doi":"10.1109/HFPSC.2001.962192","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962192","url":null,"abstract":"The ultrathick negative photoresist SU-8 has been investigated for use in the fabrication of a passively aligning micro-optical suite including elements such as fibre alignment grooves, lens holders and device alignment features. The possibility for the fabrication of mirrors is also considered. The excellent micromachining properties of SU-8 using common low-cost, fast photolithographical techniques with processing temperatures of below 100/spl deg/C make it an ideal material for the rapid, cost-effective prototyping of the above structures. A fibre-lens alignment structure has been fabricated and its accuracy evaluated.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129080622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Extraction of state function behaviour from large signal waveform measurements [pHEMTs] 从大信号波形测量中提取状态函数行为[pHEMTs]
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962171
D. G. Morgan, P. Tasker
{"title":"Extraction of state function behaviour from large signal waveform measurements [pHEMTs]","authors":"D. G. Morgan, P. Tasker","doi":"10.1109/HFPSC.2001.962171","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962171","url":null,"abstract":"The nonlinear state functions of the pHEMT (pseudomorphic high electron mobility transistor) are fully extracted using dynamic measurements only. A systematic reverse waveform measurement technique combined with forward waveform measurements yield the intrinsic current and charge surface state functions. The reverse extraction results have been verified to be bias and power level independent and the resultant state functions obtained are confirmed to be unique. The technique shown is able to completely characterise state function behaviour and hence minimizes the extrapolation problems associated with existing state function extraction techniques.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116510968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oblique incidence at a gyroelectric/dielectric interface at sub-terahertz and terahertz frequencies 亚太赫兹和太赫兹频率的陀螺电/介电界面斜入射
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962190
V. H. Mok, L. Davis
{"title":"Oblique incidence at a gyroelectric/dielectric interface at sub-terahertz and terahertz frequencies","authors":"V. H. Mok, L. Davis","doi":"10.1109/HFPSC.2001.962190","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962190","url":null,"abstract":"Expressions for the Reflection coefficient for oblique incidence at an interface between a dielectric and a magnetised semiconductor are presented in this paper. An effective permittivity, /spl epsi//sub eff/ and a transverse propagation coefficient, k/sub eff/ for an infinite gyroelectric medium have been derived for the case in which the electric field is perpendicular to the applied magnetic field. Graphs of effective permittivity versus frequency for Indium Antimonide (InSb) at room temperature (300 K) for both the lossless and lossy cases are shown together with the effects of the positive and the negative region. The dependence of the complex Reflection coefficient on both the frequency and the angle of incidence, including the concept of critical angle, are also presented.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134147279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fabrication of dielectric-filled rectangular waveguide using thick-film processing 用厚膜工艺制备介电填充矩形波导
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962170
M. S. Aftanasar, P. Young, I. Robertson, S. Lucyszyn
{"title":"Fabrication of dielectric-filled rectangular waveguide using thick-film processing","authors":"M. S. Aftanasar, P. Young, I. Robertson, S. Lucyszyn","doi":"10.1109/HFPSC.2001.962170","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962170","url":null,"abstract":"This paper describes the use of photoimageable thick-film technology for the fabrication of rectangular waveguides. Thick-film technology is attractive for volume manufacture and recent materials developments, such as photoimageable dielectric and conductor pastes, have led to improved edge definition and smaller feature sizes, so that thick-film circuits can equal the performance of thin-film processing. A dielectric-filled rectangular waveguide fabricated using photoimageable thick-film materials is presented. The waveguide incorporates a new transition from RFOW probe to rectangular waveguide. Results show low attenuation across the 60-90 GHz frequency range.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134244990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Proximity coupled stepped T-feed wideband linearly polarised patch antenna 接近耦合阶跃t馈宽带线性极化贴片天线
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962174
P. H. Rao, V. Fusco, R. Cahill
{"title":"Proximity coupled stepped T-feed wideband linearly polarised patch antenna","authors":"P. H. Rao, V. Fusco, R. Cahill","doi":"10.1109/HFPSC.2001.962174","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962174","url":null,"abstract":"A linearly polarised microstrip patch antenna fed by a novel stepped T-feed is presented. The antenna exhibits more than octave band impedance bandwidth for VSWR<2. The antenna operates over 1.05 to 2.4 GHz. Symmetrical far-field patterns are obtained over 46% of frequency band of operation and the cross polarisation level of the antenna is of the order of -18 to -25 dB over this band. Measured characteristics are compared with simulated predictions.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"96 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116632570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The bandwidth benefits of close-to-chip lumped element matching of microwave high power amplifiers 微波大功率放大器近片集总元件匹配的带宽效益
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962186
J. Wong, C. Aitchison
{"title":"The bandwidth benefits of close-to-chip lumped element matching of microwave high power amplifiers","authors":"J. Wong, C. Aitchison","doi":"10.1109/HFPSC.2001.962186","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962186","url":null,"abstract":"The bandwidth benefits of Close-to-Chip matching using lumped elements within the transistor encapsulation compared with Off-Chip matching using distributed elements outside the transistor encapsulation for high power microwave transistors have been simulated at 2 GHz. Simulation results indicate that Close-to-Chip matching using lumped elements gives a wider bandwidth compared with conventional Off-Chip matching using distributed elements.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132575363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Optimum network topologies for high power microwave filters 高功率微波滤波器的最佳网络拓扑
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962161
B.S. Senior, I. Hunter, V. Postoyalko, R. Parry
{"title":"Optimum network topologies for high power microwave filters","authors":"B.S. Senior, I. Hunter, V. Postoyalko, R. Parry","doi":"10.1109/HFPSC.2001.962161","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962161","url":null,"abstract":"A demand for high power filters is met by a theoretical procedure to produce prototype networks designed for high peak voltages. This is in contrast to previous techniques which look at physical design methods to minimise breakdown in the various technologies used for realisation. Limitations are placed on the optimisations to ensure practical topologies are generated.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115468581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Hybrid radio/fibre distribution system based on a directly modulated laser transmitter with external injection 基于外部注入直接调制激光发射机的混合无线电/光纤分配系统
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962169
A. Kaszubowska, L. Barry, P. Anandarajah
{"title":"Hybrid radio/fibre distribution system based on a directly modulated laser transmitter with external injection","authors":"A. Kaszubowska, L. Barry, P. Anandarajah","doi":"10.1109/HFPSC.2001.962169","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962169","url":null,"abstract":"The authors present the idea of using direct modulation of the laser for generating microwave signals for hybrid radio/fiber systems. The external light injection is used in order to increase the modulation bandwidth of the laser and at the same time to improve the overall system operation. The experiments show a 14 dB enhancement in performance of the system used for distributing a 155 Mb/s data signal on an 18 GHz carrier.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"52 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115505720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Design of L-band microwave oscillators l波段微波振荡器的设计
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962153
M. F. Ain, M. Lancaster, P. Gardner
{"title":"Design of L-band microwave oscillators","authors":"M. F. Ain, M. Lancaster, P. Gardner","doi":"10.1109/HFPSC.2001.962153","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962153","url":null,"abstract":"Oscillators are basic microwave energy sources for all microwave communication systems. Transistor oscillators can be realised using either bipolar or GaAs FET devices. This paper discusses the theory and fabrication of 1.7 GHz negative resistance and feedback type GaAs FET oscillators. A microstrip resonator has been used in the design of the negative resistance oscillator and a feedback type oscillator utilises a lumped element resonator in a feedback network. Simulation for both oscillators has been performed using Agilent ADS software. Both oscillators have been fabricated on an FR 4 PCB. The negative resistance oscillator operating at 1.66 GHz delivers +7.89 dBm output power to the 50 /spl Omega/ load. The feedback type oscillator operating at 1.47 GHz exhibits an output power of +9 dBm. The performance of those oscillators has also been compared in terms of phase noise, showing superior results for the feedback type oscillator.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127131352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Cross-channel interference due to mode partition noise in WDM systems 波分复用系统中模式分割噪声引起的跨信道干扰
6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574) Pub Date : 2001-09-09 DOI: 10.1109/HFPSC.2001.962185
P. Anandarajah, L. Barry, A. Kaszubowska
{"title":"Cross-channel interference due to mode partition noise in WDM systems","authors":"P. Anandarajah, L. Barry, A. Kaszubowska","doi":"10.1109/HFPSC.2001.962185","DOIUrl":"https://doi.org/10.1109/HFPSC.2001.962185","url":null,"abstract":"The side mode suppression ratio of self-seeded, gain-switched optical pulses is shown to be a vital parameter in wavelength division multiplexed communications systems. Experiments carried out on a 2-channel wavelength multiplexed set-up using tunable self-seeded gain-switched pulse sources at 2.5 GHz, have demonstrated the cross-channel interference effects which may be encountered if the side mode suppression ratio of one of the sources becomes degraded.","PeriodicalId":129428,"journal":{"name":"6th IEEE High Frequency Postgraduate Colloquium (Cat. No.01TH8574)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114350356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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