Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335711
F. Bhatti, Li Ying
D band 2nd harmonic InP Gunn oscillator well stabillized by high Q quasi-optical open resonator is presented. The output power of more than 2.3 mW at 136 GHz is achieved. The lunability of the oscillator over more than 10 GHz is also developed. Thie Q value of the qussi-cavity is also measured and is found to be of the order 105.
{"title":"D Band (110-150) GHz 2nd Harmonic InP Gunn Oscillator Well Stabilized by High Q Quasi-Optical Open Resonator","authors":"F. Bhatti, Li Ying","doi":"10.1109/EUMA.1992.335711","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335711","url":null,"abstract":"D band 2nd harmonic InP Gunn oscillator well stabillized by high Q quasi-optical open resonator is presented. The output power of more than 2.3 mW at 136 GHz is achieved. The lunability of the oscillator over more than 10 GHz is also developed. Thie Q value of the qussi-cavity is also measured and is found to be of the order 105.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117087148","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335784
S. Kolesov, A. Kozyrev, A. Popov
The microwave technique needs the development of CAD for the microwave integrated circuits based on high-temperature superconducting films and intended to operate at the liquid nitrogen temperature. The model of bipolaron charge carrier transport was used to obtained the surface resistance as a function of temperature and frequency. The current distribution across the transmission line in quasi-static approximation has been used to calculate the resistance per unit length of the line. The set of model fitting parame ters provides a good agreement between calculation and experimental data.
{"title":"CAD Modeling of High-Temperature Superconducting Films","authors":"S. Kolesov, A. Kozyrev, A. Popov","doi":"10.1109/EUMA.1992.335784","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335784","url":null,"abstract":"The microwave technique needs the development of CAD for the microwave integrated circuits based on high-temperature superconducting films and intended to operate at the liquid nitrogen temperature. The model of bipolaron charge carrier transport was used to obtained the surface resistance as a function of temperature and frequency. The current distribution across the transmission line in quasi-static approximation has been used to calculate the resistance per unit length of the line. The set of model fitting parame ters provides a good agreement between calculation and experimental data.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117127314","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335794
R. Lang, SS. Bhumbra, S. Nightingale, M. McDermott
The design and test of two 35GHz low-loss GaAs monolithic balanced diode mixers are reported. A proprietary harmonic balance simulator was used to design the mixers which were fabricated at the Alpha Industries foundry. A first-pass design success was achieved. Measurements of the mixers performance on-wafer at 35GHz indicate wide-band operation with a best conversion loss of 4.6dB for an IF of 100MHz. Measured performance was shown to be within 0.8dB of the harmonic balance analysis for local oscillator drive levels between 9dBm and 15dBm and helped to confirm the accuracy of the harmonic balance method for millimetre wave large-signal circuit designs. We believe these results to be some of the lowest reported to date for a monolithic design at 35GHz. In designing these mixers, particular attention was paid to the design of embedding networks at the pump harmonic and mixed product frequencies in order to minimise conversion loss and LO power.
{"title":"Low Conversion Loss Ka-Band GaAs Monolithic Diode Mixers","authors":"R. Lang, SS. Bhumbra, S. Nightingale, M. McDermott","doi":"10.1109/EUMA.1992.335794","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335794","url":null,"abstract":"The design and test of two 35GHz low-loss GaAs monolithic balanced diode mixers are reported. A proprietary harmonic balance simulator was used to design the mixers which were fabricated at the Alpha Industries foundry. A first-pass design success was achieved. Measurements of the mixers performance on-wafer at 35GHz indicate wide-band operation with a best conversion loss of 4.6dB for an IF of 100MHz. Measured performance was shown to be within 0.8dB of the harmonic balance analysis for local oscillator drive levels between 9dBm and 15dBm and helped to confirm the accuracy of the harmonic balance method for millimetre wave large-signal circuit designs. We believe these results to be some of the lowest reported to date for a monolithic design at 35GHz. In designing these mixers, particular attention was paid to the design of embedding networks at the pump harmonic and mixed product frequencies in order to minimise conversion loss and LO power.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117132961","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335690
B. Lai, R. Walker, C. Stout, Jieh-Tsorng Wu
A 1.5 GBaud/s serial data link comprised of a 2-chip set capable of transporting up to 21 parallel bits was successfully fabricated using a 25 GHz peak ft silicon bipolar process. This link features a new encoding scheme which allows DC balance in the serial stream, as well as an internally generated clock which phase locks to the user's clock at the transmitter, and full clock recovery and data retiming at the receiver. In addition, a controller integrated with the link handles handshaking at start up for full duplex operation.
{"title":"A 1.5 GBaud/sec Serial Link Monolithic Chip Set","authors":"B. Lai, R. Walker, C. Stout, Jieh-Tsorng Wu","doi":"10.1109/EUMA.1992.335690","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335690","url":null,"abstract":"A 1.5 GBaud/s serial data link comprised of a 2-chip set capable of transporting up to 21 parallel bits was successfully fabricated using a 25 GHz peak ft silicon bipolar process. This link features a new encoding scheme which allows DC balance in the serial stream, as well as an internally generated clock which phase locks to the user's clock at the transmitter, and full clock recovery and data retiming at the receiver. In addition, a controller integrated with the link handles handshaking at start up for full duplex operation.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117138320","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335869
B. A. Xavier, C. Aitchison
A GaAs heterojunction bipolar transistor (HBT) single ended active mixer is discussed. Simulations are performed using a large signal HBT model. A novel way of incorporating the d.c equations of an HBT into a large signal simulator is described. Both conversion gain and intermodulation properties are predicted to within ±3dB of measured values. The measured intermodulation performance of the device in a tuned state is superior to both a resistive MESFET and HEMT mixer.
{"title":"Performance and Large Signal Modelling of a GaAs Heterojunction Bipolar Transistor Mixer at 950MHz","authors":"B. A. Xavier, C. Aitchison","doi":"10.1109/EUMA.1992.335869","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335869","url":null,"abstract":"A GaAs heterojunction bipolar transistor (HBT) single ended active mixer is discussed. Simulations are performed using a large signal HBT model. A novel way of incorporating the d.c equations of an HBT into a large signal simulator is described. Both conversion gain and intermodulation properties are predicted to within ±3dB of measured values. The measured intermodulation performance of the device in a tuned state is superior to both a resistive MESFET and HEMT mixer.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131531070","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335761
A. Orlando
Theoretical analysis and numerical results of the dispersion characteristic of a periodic circular waveguide loaded by an azimuthally magnetized ferrite rod are presented. Higher order modes are included in the slot region such that circularly non-symmetric quasi-TE modes that are affected by the corrugations can propagate. The space harmonics in the ferrite-rod are expressed in terms of special functions given by series expansions and asymptotic expressions. The boundary value problem is solved by truncating the infinite order determinantal secular equation at some highest order. Dispersion curves for quasi-TE (HE) and quasi-TM (EH) modes are given.
{"title":"Periodic Circular Waveguides Containing Azimuthally Magnetized Ferrite Rod","authors":"A. Orlando","doi":"10.1109/EUMA.1992.335761","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335761","url":null,"abstract":"Theoretical analysis and numerical results of the dispersion characteristic of a periodic circular waveguide loaded by an azimuthally magnetized ferrite rod are presented. Higher order modes are included in the slot region such that circularly non-symmetric quasi-TE modes that are affected by the corrugations can propagate. The space harmonics in the ferrite-rod are expressed in terms of special functions given by series expansions and asymptotic expressions. The boundary value problem is solved by truncating the infinite order determinantal secular equation at some highest order. Dispersion curves for quasi-TE (HE) and quasi-TM (EH) modes are given.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125417625","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335684
J. Bolomey, A. Joisel, C. Pichot, G. Gaboriaud
This paper deals with the improvement of the quality of images obtained at 2.45 GHz, by means of a planar microwave camera for biomedical applications. The results provided by standard spectral techniques, classically used for diffraction tomography reconstructions, are shown to be significantly improved by different processing techniques. The particular case of human hand imaging is presented for its clinical interest in the early diagnostic of fibrosis after accidental irradiations.
{"title":"Processing Techniques to Improve Microwave Images for Biomedical Applications","authors":"J. Bolomey, A. Joisel, C. Pichot, G. Gaboriaud","doi":"10.1109/EUMA.1992.335684","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335684","url":null,"abstract":"This paper deals with the improvement of the quality of images obtained at 2.45 GHz, by means of a planar microwave camera for biomedical applications. The results provided by standard spectral techniques, classically used for diffraction tomography reconstructions, are shown to be significantly improved by different processing techniques. The particular case of human hand imaging is presented for its clinical interest in the early diagnostic of fibrosis after accidental irradiations.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114519395","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335809
O. Abo-Elnor, K. Schuenemann
In this paper, a cavity stabilized FET harmonic-mode oscillator is investigated. The cavity is inserted in the fundamental or harmonic circuit. A comparison for these two modes of stabilization is made between the different possible types of cavities, i.e., reaction, transmission, reflection, and feedback-type cavities. The performance for these circuits differs in harmonic output power, loaded quality factor, and stable tuning range. The effect on the PM output noise is also given.
{"title":"A Comparison Between Different Stabilizing Modes of FET Harmonic-Mode Oscillators","authors":"O. Abo-Elnor, K. Schuenemann","doi":"10.1109/EUMA.1992.335809","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335809","url":null,"abstract":"In this paper, a cavity stabilized FET harmonic-mode oscillator is investigated. The cavity is inserted in the fundamental or harmonic circuit. A comparison for these two modes of stabilization is made between the different possible types of cavities, i.e., reaction, transmission, reflection, and feedback-type cavities. The performance for these circuits differs in harmonic output power, loaded quality factor, and stable tuning range. The effect on the PM output noise is also given.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114623034","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335691
W. Kuempel, I. Wolff
This paper presents a technique for considerably reducing the required time steps of time-domain field simulations using modern digital signal processing techniques. The procedure leads to a simple model of the investigated structure in form of a digital filter which is suitable for further circuit simulations. As an example the method is applied to a FDTD simulation of a coplanar band-reject filter.
{"title":"System Identification Method for Transient Analysis of (M) MIC-Components using Time Iterative Methods","authors":"W. Kuempel, I. Wolff","doi":"10.1109/EUMA.1992.335691","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335691","url":null,"abstract":"This paper presents a technique for considerably reducing the required time steps of time-domain field simulations using modern digital signal processing techniques. The procedure leads to a simple model of the investigated structure in form of a digital filter which is suitable for further circuit simulations. As an example the method is applied to a FDTD simulation of a coplanar band-reject filter.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114875413","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}
Pub Date : 1992-10-01DOI: 10.1109/EUMA.1992.335685
P. Piironen, J. Mallat, A. Rasanen, E. Siivola, J. Takala, P. Jukkala, P. Sailamaki, H. Somerma, J. Ylinen
The Radioastron space VLBI satellite, expected to be launched in 1995, will have on board four sensitive two-channel radiometers. Finland is responsible for the 22 GHz receiver. The most important properties of the receiver are sensitivity, phase stability and gain stability. To reach maximum sensitivity, a modern space qualified low noise HEMT amplifier has been designed. The measured receiver noise temperature is 140 K. For maximum phase and amplitude stabilities, temperature stabilisation and a high Q dielectric resonator oscillator design have been utilized. The measured phase stability is better than 3 o/h. The main aspects of the space qualification tests and the reliability analysis are described.
{"title":"Space Qualification of the Radioastron 22 GHz Receiver","authors":"P. Piironen, J. Mallat, A. Rasanen, E. Siivola, J. Takala, P. Jukkala, P. Sailamaki, H. Somerma, J. Ylinen","doi":"10.1109/EUMA.1992.335685","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335685","url":null,"abstract":"The Radioastron space VLBI satellite, expected to be launched in 1995, will have on board four sensitive two-channel radiometers. Finland is responsible for the 22 GHz receiver. The most important properties of the receiver are sensitivity, phase stability and gain stability. To reach maximum sensitivity, a modern space qualified low noise HEMT amplifier has been designed. The measured receiver noise temperature is 140 K. For maximum phase and amplitude stabilities, temperature stabilisation and a high Q dielectric resonator oscillator design have been utilized. The measured phase stability is better than 3 o/h. The main aspects of the space qualification tests and the reliability analysis are described.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124282551","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}
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