In this paper, a novel ultra wideband (UWB) planer antenna is proposed. The antenna is composed of a circle ring radiator and partially grounded, which occupies about 3 GHz bandwidth covering 6-9 GHz. A quasi-omnidirectional and quasi- symmetrical radiation pattern in y-z plane in the whole frequency band is also obtained. The results validated that the antenna satisfies the requirements of UWB communications, and will be a good solution for UWB applications.
{"title":"A Novel Ultra Wideband Planar Antenna","authors":"H.-W. Deng, Xiaoxiang He, Shaobin Liu, Yongjun Xie","doi":"10.1109/GSMM.2008.4534625","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534625","url":null,"abstract":"In this paper, a novel ultra wideband (UWB) planer antenna is proposed. The antenna is composed of a circle ring radiator and partially grounded, which occupies about 3 GHz bandwidth covering 6-9 GHz. A quasi-omnidirectional and quasi- symmetrical radiation pattern in y-z plane in the whole frequency band is also obtained. The results validated that the antenna satisfies the requirements of UWB communications, and will be a good solution for UWB applications.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114679511","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534631
Xiao-Lin, Wen-Yuan Li, Zhigong Wang
A 5.25 GHz linear power amplifier for Wireless LAN application has been realized in 0.35 mum SiGe BiCMOS technology. This paper presents a two-stage power amplifier operating at AB mode under a single supply of +3.3 v. A current mirror bias circuit is integrated to improve the linearity, efficiency, gain of the power amplifier. The result of simulation shows that the output 1 dB compression point (OP1 dB) is 26.3 dBm, the saturated output power achieves 28.5 dBm, the power added efficiency (PAE) at OP1 dB is about 20%, and the small signal gain is 28.3 dB at 3.3 v supply voltage.
{"title":"A 5.25GHz 0.35um SiGe BiCMOS Power Amplifier for IEEE 802.11a Wireless LAN","authors":"Xiao-Lin, Wen-Yuan Li, Zhigong Wang","doi":"10.1109/GSMM.2008.4534631","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534631","url":null,"abstract":"A 5.25 GHz linear power amplifier for Wireless LAN application has been realized in 0.35 mum SiGe BiCMOS technology. This paper presents a two-stage power amplifier operating at AB mode under a single supply of +3.3 v. A current mirror bias circuit is integrated to improve the linearity, efficiency, gain of the power amplifier. The result of simulation shows that the output 1 dB compression point (OP1 dB) is 26.3 dBm, the saturated output power achieves 28.5 dBm, the power added efficiency (PAE) at OP1 dB is about 20%, and the small signal gain is 28.3 dB at 3.3 v supply voltage.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127294127","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534600
Yan-hong Sun, Q. Yao
This paper mainly presents the frequency and temperature characteristics of a W-band attenuator, which include the correlation of signal frequency to attenuation and ambient temperature to attenuation respectively. Since the attenuation has dependence on input frequency and ambient temperature, the investigation on these characteristics is helpful to the application of the attenuator. With the adoption of the EncoderDrivetrade micro-positioner [1], the frequency and temperature characteristics of W-band attenuator may then be quickly explored despite the short system stability. The setup and the experimental results are discussed in details as well.
{"title":"Investigation on the Characteristics of W-band Attenuator Based on the Automatic Tuning System","authors":"Yan-hong Sun, Q. Yao","doi":"10.1109/GSMM.2008.4534600","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534600","url":null,"abstract":"This paper mainly presents the frequency and temperature characteristics of a W-band attenuator, which include the correlation of signal frequency to attenuation and ambient temperature to attenuation respectively. Since the attenuation has dependence on input frequency and ambient temperature, the investigation on these characteristics is helpful to the application of the attenuator. With the adoption of the EncoderDrivetrade micro-positioner [1], the frequency and temperature characteristics of W-band attenuator may then be quickly explored despite the short system stability. The setup and the experimental results are discussed in details as well.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131040204","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534581
Xin Wang, W. Yin, J. Mao
An accurate procedure is proposed to characterize distributed parameters of silicon-based patterned shield and patterned ground shield coplanar waveguides (PS-and PGS-CPWs), where skin and proximity effects are treated appropriately. These interconnects can include symmetrical, asymmetrical, non-uniform, and even differential transmission lines. Numerical investigations are carried out to show the influence of various geometrical and physical parameters on the frequency-dependent distributed parameters, which is important in the design of silicon-based microwave and millimeter wave integrated circuits.
{"title":"Parameter Characterization of Silicon-Based Patterned Shield and Patterned Ground Shield Coplanar Waveguides","authors":"Xin Wang, W. Yin, J. Mao","doi":"10.1109/GSMM.2008.4534581","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534581","url":null,"abstract":"An accurate procedure is proposed to characterize distributed parameters of silicon-based patterned shield and patterned ground shield coplanar waveguides (PS-and PGS-CPWs), where skin and proximity effects are treated appropriately. These interconnects can include symmetrical, asymmetrical, non-uniform, and even differential transmission lines. Numerical investigations are carried out to show the influence of various geometrical and physical parameters on the frequency-dependent distributed parameters, which is important in the design of silicon-based microwave and millimeter wave integrated circuits.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134416887","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534629
Lei Shi, Houjun Sun, Xin Lu
The application of an array of circular polarized log periodic dipole antennas (LPDA) as feed array for a multiple-beam antenna to cover 3.5:1 bandwidths is described. Meanwhile, the use of an array of log-periodic antennas for two kinds of arrangement: rectangular grid and hexagonal grid illumination is also presented. In comparison with the rectangular grid, hexagonal grid is more efficient in beam coverage area for synchronous-orbiting communications satellites. Enhanced feed concept is used in the LPDA feed array in order to increase gain in coverage area. Finally, the simulated results for beam contour which is excite by right-hand circular polarized LPDA of both grids and enhanced beam contour over the frequency range of 0.8 GH to 2.5 GHz are demonstrated.
{"title":"A Study of Log Periodic Feeds Multiple-Beam Antenna: Offset Parabolic Reflector Antenna","authors":"Lei Shi, Houjun Sun, Xin Lu","doi":"10.1109/GSMM.2008.4534629","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534629","url":null,"abstract":"The application of an array of circular polarized log periodic dipole antennas (LPDA) as feed array for a multiple-beam antenna to cover 3.5:1 bandwidths is described. Meanwhile, the use of an array of log-periodic antennas for two kinds of arrangement: rectangular grid and hexagonal grid illumination is also presented. In comparison with the rectangular grid, hexagonal grid is more efficient in beam coverage area for synchronous-orbiting communications satellites. Enhanced feed concept is used in the LPDA feed array in order to increase gain in coverage area. Finally, the simulated results for beam contour which is excite by right-hand circular polarized LPDA of both grids and enhanced beam contour over the frequency range of 0.8 GH to 2.5 GHz are demonstrated.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132772489","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534661
S. Xiao, Li Jiang, Bing-Zhong Wang, Jian-Peng Wang
Antenna element and array with harmonic suppression ability are desired in compact and integrated RF front-end systems, because they can lead to remove the additional bandpass filter. This paper presents a microstrip antenna element with the operation frequency of 35 GHz. A good second order harmonic suppression performance is obtained by a compact co-planar structure. A 1times4 array constructed by this element is also studied. The antenna array is fed by a corporate-feed network without using quarter-wavelength impedance transformers. Element and array gain of 5.4 dB and 11.4 dB are achieved, respectively. Compared to the traditional antenna array, the studies indicate that the array obtains a gain suppression of 9.1 dB and 7.0 dB at the frequency of 46 GHz (corresponding to TMn of the reference antenna array) and the second order harmonic frequency of 70 GHz, respectively.
{"title":"A Millimeter Wave Microstrip Antenna Array with Harmonics Suppression Elements","authors":"S. Xiao, Li Jiang, Bing-Zhong Wang, Jian-Peng Wang","doi":"10.1109/GSMM.2008.4534661","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534661","url":null,"abstract":"Antenna element and array with harmonic suppression ability are desired in compact and integrated RF front-end systems, because they can lead to remove the additional bandpass filter. This paper presents a microstrip antenna element with the operation frequency of 35 GHz. A good second order harmonic suppression performance is obtained by a compact co-planar structure. A 1times4 array constructed by this element is also studied. The antenna array is fed by a corporate-feed network without using quarter-wavelength impedance transformers. Element and array gain of 5.4 dB and 11.4 dB are achieved, respectively. Compared to the traditional antenna array, the studies indicate that the array obtains a gain suppression of 9.1 dB and 7.0 dB at the frequency of 46 GHz (corresponding to TMn of the reference antenna array) and the second order harmonic frequency of 70 GHz, respectively.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134082511","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534648
Y. Lai, Shi-Chang Zhang
Based on the coupled mode theory of the 1D coaxial Bragg structure, numerical analysis is carried out to study the band-gap peculiarity of an overmoded coaxial Bragg reflector. Results indicate that, usually, the band-gap overlapping becomes very serious under the overmoded operation; however, it can be controlled by tuning the relative initial corrugation phase shift between the outer wall and the inner rod of the Bragg structure. Especially, the serious overlapping can be well improved by setting the phase shift to pi.
{"title":"Band Gap and Frequency Response in an Overmoded Coaxial Bragg Reflector","authors":"Y. Lai, Shi-Chang Zhang","doi":"10.1109/GSMM.2008.4534648","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534648","url":null,"abstract":"Based on the coupled mode theory of the 1D coaxial Bragg structure, numerical analysis is carried out to study the band-gap peculiarity of an overmoded coaxial Bragg reflector. Results indicate that, usually, the band-gap overlapping becomes very serious under the overmoded operation; however, it can be controlled by tuning the relative initial corrugation phase shift between the outer wall and the inner rod of the Bragg structure. Especially, the serious overlapping can be well improved by setting the phase shift to pi.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132682622","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534591
J. Yang, W. Shan, S. Shi, Q. Yao, Y. Zuo, S.H. Chen, A. Cao, Z.H. Lin
The studies on formation and evolution of interstellar molecular clouds and star formation give rise to high demands on imaging capability of millimeter-wave spectroscopic receiver. The Superconducting Spectroscopic Array Receiver (SSAR) of 3times3 pixels has been designed to work over 85-116 GHz. A number of new technological approaches are applied in the development of SSAR including of 4-K cooled superconducting SIS mixers using sideband separating scheme, automatically tuned digital bias, cooled SiGe HBT amplifiers, and digital FFT spectrometers. Development of the receiver system is undergoing. Upon completion, this instrument will enhance significantly the mapping capability in millimeter-wave line observations with high spectroscopic resolution. This paper introduces the main technological features applied in design and development of the receiver system.
{"title":"The Superconducting Spectroscopic Array Receiver (SSAR) for Millimeter-wave Radio Astronomy","authors":"J. Yang, W. Shan, S. Shi, Q. Yao, Y. Zuo, S.H. Chen, A. Cao, Z.H. Lin","doi":"10.1109/GSMM.2008.4534591","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534591","url":null,"abstract":"The studies on formation and evolution of interstellar molecular clouds and star formation give rise to high demands on imaging capability of millimeter-wave spectroscopic receiver. The Superconducting Spectroscopic Array Receiver (SSAR) of 3times3 pixels has been designed to work over 85-116 GHz. A number of new technological approaches are applied in the development of SSAR including of 4-K cooled superconducting SIS mixers using sideband separating scheme, automatically tuned digital bias, cooled SiGe HBT amplifiers, and digital FFT spectrometers. Development of the receiver system is undergoing. Upon completion, this instrument will enhance significantly the mapping capability in millimeter-wave line observations with high spectroscopic resolution. This paper introduces the main technological features applied in design and development of the receiver system.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"58 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114089877","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}
The laser scattering characteristic of spheroidal interstellar dust moving with a high speed is investigated numerically. The coordinate and vector transformations have been presented to establish a theoretic basis for studying the laser scattering of a moving spheroidal interstellar dust. The laser differential scattered section (DSS) of a moving spheroidal interstellar dust is explained by the electric and magnetic field from Mie scattering theory in detail. Assuming the laser length of 2.2 mum, we had computed the ratio of the laser DSS of the moving spheroidal interstellar dust to that of the static interstellar dust, which changes with radii and scattering angles of the particle. The numerical results showed that the laser DSS of the moving spherical particle is tightly connected with its speed and scattering zenith angle. If a spheroidal interstellar dust moves with high speed, it has a strong forward scattering .The speed of the moving spheroidal interstellar dust is higher, the laser DSS value is larger. If a spheroidal interstellar dust moves with a low speed, the Influence of a high-speed spheroidal interstellar dust's movement on its scattering characteristics will be neglected.
{"title":"Study on the Differential Scattered Section of a Moving spheroidal Interstellar Dust","authors":"Ming-jun Wang, Zhensen Wu, Yingle Li, Zhang Hui, Xiao-an Zhang","doi":"10.1109/GSMM.2008.4534596","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534596","url":null,"abstract":"The laser scattering characteristic of spheroidal interstellar dust moving with a high speed is investigated numerically. The coordinate and vector transformations have been presented to establish a theoretic basis for studying the laser scattering of a moving spheroidal interstellar dust. The laser differential scattered section (DSS) of a moving spheroidal interstellar dust is explained by the electric and magnetic field from Mie scattering theory in detail. Assuming the laser length of 2.2 mum, we had computed the ratio of the laser DSS of the moving spheroidal interstellar dust to that of the static interstellar dust, which changes with radii and scattering angles of the particle. The numerical results showed that the laser DSS of the moving spherical particle is tightly connected with its speed and scattering zenith angle. If a spheroidal interstellar dust moves with high speed, it has a strong forward scattering .The speed of the moving spheroidal interstellar dust is higher, the laser DSS value is larger. If a spheroidal interstellar dust moves with a low speed, the Influence of a high-speed spheroidal interstellar dust's movement on its scattering characteristics will be neglected.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115120267","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 : 2008-04-21DOI: 10.1109/GSMM.2008.4534566
Y. D. Dong, W. Hong, H. Tang
A novel millimeter wave filter based on substrate integrated waveguide (SIW) technology is presented. TE301 mode cavity is used in the design in order to improve the quality (Q) factor of the filter. Some corrective measures are taken to compensate for the unsymmetrical transmission response produced by parasitic coupling from the non-resonant mode. Measured results show that the stopband rejection of this filter is better than -45 dB. Sharp transition characteristic in both the lower side and the upper side demonstrates high selectivity of this filter.
{"title":"A Novel Millimeter Wave Substrate Integrated Waveguide Filter Using TE301 Mode Cavities","authors":"Y. D. Dong, W. Hong, H. Tang","doi":"10.1109/GSMM.2008.4534566","DOIUrl":"https://doi.org/10.1109/GSMM.2008.4534566","url":null,"abstract":"A novel millimeter wave filter based on substrate integrated waveguide (SIW) technology is presented. TE301 mode cavity is used in the design in order to improve the quality (Q) factor of the filter. Some corrective measures are taken to compensate for the unsymmetrical transmission response produced by parasitic coupling from the non-resonant mode. Measured results show that the stopband rejection of this filter is better than -45 dB. Sharp transition characteristic in both the lower side and the upper side demonstrates high selectivity of this filter.","PeriodicalId":304483,"journal":{"name":"2008 Global Symposium on Millimeter Waves","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133045496","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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