Pub Date : 2012-12-01DOI: 10.1109/APMC.2012.6421752
M. Hashmi, P. Tasker, F. Ghannouchi
Characterisation, test and modelling of microwave devices and transistors are becoming the pre-requisite for the utilization in the design of modern wireless power amplifies. This serves dual purpose; on one hand it saves the effort and investment due to the possible anomaly in the expected performance of the design while on the other hand it provides a reliable performance estimation of the transistors and devices apriori. Design of matching circuit is one of the most important stages in the overall performance investigation and analysis of the Power Amplifiers (PAs). Load-pull techniques are extensively used in the synthesis of required load impedance, and in turn the design of matching circuit. This paper discusses some unique features of the Envelope Load-Pull technique and demonstrates usefulness of such features in high speed device characterization.
{"title":"High speed device characterization enabler: The Envelope Load-Pull system","authors":"M. Hashmi, P. Tasker, F. Ghannouchi","doi":"10.1109/APMC.2012.6421752","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421752","url":null,"abstract":"Characterisation, test and modelling of microwave devices and transistors are becoming the pre-requisite for the utilization in the design of modern wireless power amplifies. This serves dual purpose; on one hand it saves the effort and investment due to the possible anomaly in the expected performance of the design while on the other hand it provides a reliable performance estimation of the transistors and devices apriori. Design of matching circuit is one of the most important stages in the overall performance investigation and analysis of the Power Amplifiers (PAs). Load-pull techniques are extensively used in the synthesis of required load impedance, and in turn the design of matching circuit. This paper discusses some unique features of the Envelope Load-Pull technique and demonstrates usefulness of such features in high speed device characterization.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126592014","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 : 2012-12-01DOI: 10.1587/TRANSCOM.E97.B.1395
Shumo Li, N. Honma
In this paper, a novel decoupling network comprising transmission lines and a bridge resistance are presented and its performance is evaluated based on the measurement. To decouple the antennas, the phase of the mutual admittance between the antenna ports is rotated by using the transmission lines, and a bridge resistance is inserted between the two antenna ports to cancel a mutual coupling. A proposed decoupling network is fabricated and tested. The measurement results indicated the proposed decoupling network can provide wider bandwidth compared with the conventional one.
{"title":"Decoupling network comprising transmission lines and bridge resistance for two-element array antenna","authors":"Shumo Li, N. Honma","doi":"10.1587/TRANSCOM.E97.B.1395","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E97.B.1395","url":null,"abstract":"In this paper, a novel decoupling network comprising transmission lines and a bridge resistance are presented and its performance is evaluated based on the measurement. To decouple the antennas, the phase of the mutual admittance between the antenna ports is rotated by using the transmission lines, and a bridge resistance is inserted between the two antenna ports to cancel a mutual coupling. A proposed decoupling network is fabricated and tested. The measurement results indicated the proposed decoupling network can provide wider bandwidth compared with the conventional one.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"334 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126026472","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421515
Chun-Ping Chen, J. Oda, Y. Kamiji, T. Anada, Zhewang Ma
A simple quasi-elliptical-function-based design methodology is proposed for a class of ultra-wideband(UWB) filters consisting of stepped-impedance resonators (SIRs) based on parallel-coupled three-line, short-circuited stubs and two-section stepped-impedance open-circuited stubs. Furthermore, the influence of the location of the loaded stubs and the type of stubs applied to the filter characteristics is investigated. As an example, a UWB BPF with a fractional bandwidth (FBW) of 110% (BW: 3.1~10.6GHz) is then synthesized, simulated, fabricated and measured. The measured frequency responses of the UWB filter compare very well with the predicted ones and successfully satisfy outdoor specifications of FCC, which validates the correctness and effectiveness of the proposed technique. The designed UWB filter exhibits very sharp roll-off characteristics of 90dB/GHz and a compact size of 13.05mm.
{"title":"Theoretical/synthesis design of compact UWB bandpass filters with very sharp roll-off characteristics","authors":"Chun-Ping Chen, J. Oda, Y. Kamiji, T. Anada, Zhewang Ma","doi":"10.1109/APMC.2012.6421515","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421515","url":null,"abstract":"A simple quasi-elliptical-function-based design methodology is proposed for a class of ultra-wideband(UWB) filters consisting of stepped-impedance resonators (SIRs) based on parallel-coupled three-line, short-circuited stubs and two-section stepped-impedance open-circuited stubs. Furthermore, the influence of the location of the loaded stubs and the type of stubs applied to the filter characteristics is investigated. As an example, a UWB BPF with a fractional bandwidth (FBW) of 110% (BW: 3.1~10.6GHz) is then synthesized, simulated, fabricated and measured. The measured frequency responses of the UWB filter compare very well with the predicted ones and successfully satisfy outdoor specifications of FCC, which validates the correctness and effectiveness of the proposed technique. The designed UWB filter exhibits very sharp roll-off characteristics of 90dB/GHz and a compact size of 13.05mm.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114137756","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421485
A. Saitou, R. Ishikawa, K. Honjo
Miniature broadband 1:1 baluns for differential mode antennas are exhibited with an asymmetric broadside coupled line in an inhomogeneous medium. To design characteristics of a balun for both the in-band and the rejection band, c- and π-mode parameters for the coupled lines are extracted by both simulation and measurement. The rejection band of the broadband balun is shown to be caused by the c-mode transmission. With the extracted parameters, optimal line dimensions are obtained for 50 Ω single-mode input and differential-mode output port impedances. Measured fractional bandwidth is as wide as 178% for the 0.2-mm-wide broadside coupled line in a 1-mm-thick multi-layer FR-4 substrate.
{"title":"Parameter Extraction of c- and π- modes for broadband balun using an asymmetric coupled line","authors":"A. Saitou, R. Ishikawa, K. Honjo","doi":"10.1109/APMC.2012.6421485","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421485","url":null,"abstract":"Miniature broadband 1:1 baluns for differential mode antennas are exhibited with an asymmetric broadside coupled line in an inhomogeneous medium. To design characteristics of a balun for both the in-band and the rejection band, c- and π-mode parameters for the coupled lines are extracted by both simulation and measurement. The rejection band of the broadband balun is shown to be caused by the c-mode transmission. With the extracted parameters, optimal line dimensions are obtained for 50 Ω single-mode input and differential-mode output port impedances. Measured fractional bandwidth is as wide as 178% for the 0.2-mm-wide broadside coupled line in a 1-mm-thick multi-layer FR-4 substrate.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121208836","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421840
C. Kuan, Tzu-Chao Yan, C. Kuo
A broadband frequency-to-voltage converter is designed to operate at the multi-GHz frequency band. The circuit detects the input signal frequency and generates a DC output voltage correspondingly, regardless of the input power variation through a two-path signal process of frequency discrimination and signal power reference. One advantage of the design utilizing power detection makes the method feasible for very high frequency applications. The integrated design is verified in an integrated system mixed with off-the-shelf commercial components. Measurement results show a maximum output voltage RMS error of 2.1 % over the input frequency from 1 GHz to 4 GHz with the input power level -30 dBm to 0 dBm.
{"title":"A 1–4 GHz frequency-to-voltage converter design","authors":"C. Kuan, Tzu-Chao Yan, C. Kuo","doi":"10.1109/APMC.2012.6421840","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421840","url":null,"abstract":"A broadband frequency-to-voltage converter is designed to operate at the multi-GHz frequency band. The circuit detects the input signal frequency and generates a DC output voltage correspondingly, regardless of the input power variation through a two-path signal process of frequency discrimination and signal power reference. One advantage of the design utilizing power detection makes the method feasible for very high frequency applications. The integrated design is verified in an integrated system mixed with off-the-shelf commercial components. Measurement results show a maximum output voltage RMS error of 2.1 % over the input frequency from 1 GHz to 4 GHz with the input power level -30 dBm to 0 dBm.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123787018","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421736
M. Bozzi
This paper presents an overview of the state-of-the-art and the research trends of substrate integrated waveguide (SIW) technology, which represents an emerging approach for the implementation and integration of microwave and millimeter-wave components and wireless systems. Innovative materials and new fabrication techniques, along with a variety of novel applications, are presented, with particular focus on low-cost and eco-friendly wireless systems for wireless sensor networks and the future Internet of Things (IoT).
{"title":"Substrate integrated waveguide (SIW): An emerging technology for wireless systems","authors":"M. Bozzi","doi":"10.1109/APMC.2012.6421736","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421736","url":null,"abstract":"This paper presents an overview of the state-of-the-art and the research trends of substrate integrated waveguide (SIW) technology, which represents an emerging approach for the implementation and integration of microwave and millimeter-wave components and wireless systems. Innovative materials and new fabrication techniques, along with a variety of novel applications, are presented, with particular focus on low-cost and eco-friendly wireless systems for wireless sensor networks and the future Internet of Things (IoT).","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123801677","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421861
Shun‐Yun Lin, Yu-Chih Lin, Ming-Horng Chen
A novel CP antenna for UHF RFID readers is proposed in this paper. An antenna prototype that operates in the UHF RFID band is successfully developed using an orthogonally truncated radiation patch, an obliquely slotted ground plane, and a 50- microstrip line that proximally fed the antenna. All elements are printed on a microwave substrate in a vertical structure. The antenna dimension of 65×90×0.8 mm3 is suitable to use for handheld devices. The impedance bandwidth for 2.5 VSWR and the 3-dB axial-ratio bandwidth are 15.2% (880 MHz~1025 MHz) and 6.5% (890 MHz~950 MHz), respectively.
{"title":"Monopole antenna with circular polarization for handheld RFID","authors":"Shun‐Yun Lin, Yu-Chih Lin, Ming-Horng Chen","doi":"10.1109/APMC.2012.6421861","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421861","url":null,"abstract":"A novel CP antenna for UHF RFID readers is proposed in this paper. An antenna prototype that operates in the UHF RFID band is successfully developed using an orthogonally truncated radiation patch, an obliquely slotted ground plane, and a 50- microstrip line that proximally fed the antenna. All elements are printed on a microwave substrate in a vertical structure. The antenna dimension of 65×90×0.8 mm3 is suitable to use for handheld devices. The impedance bandwidth for 2.5 VSWR and the 3-dB axial-ratio bandwidth are 15.2% (880 MHz~1025 MHz) and 6.5% (890 MHz~950 MHz), respectively.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121571055","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421505
Byung‐chul Park, Jeong‐Hae Lee
In this paper, a dual-band omnidirectional circularly polarized (CP) antenna is presented using 0 and +1 modes of epsilon negative (ENG) transmission line (TL). The antenna is based on the circular mushroom structure with curved branches. The CP antenna is a planar type and simply designed without 90 degree phase shifter and dual feeding structure. The measured average axial ratios at 0 and +1 mode in the azimuthal plane are 2.03 dB and 3.88 dB, respectively. The measured average left-hand (LH) CP gain and right-hand (RH) CP gain are -0.40 dBic at 0 mode and -0.66 dBic at +1 mode, respectively, in the azimuthal plane and these results show a good agreement with simulated data.
{"title":"Dual-band omnidirectional circularly polarized antenna utilizing epsilon negative transmission line","authors":"Byung‐chul Park, Jeong‐Hae Lee","doi":"10.1109/APMC.2012.6421505","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421505","url":null,"abstract":"In this paper, a dual-band omnidirectional circularly polarized (CP) antenna is presented using 0 and +1 modes of epsilon negative (ENG) transmission line (TL). The antenna is based on the circular mushroom structure with curved branches. The CP antenna is a planar type and simply designed without 90 degree phase shifter and dual feeding structure. The measured average axial ratios at 0 and +1 mode in the azimuthal plane are 2.03 dB and 3.88 dB, respectively. The measured average left-hand (LH) CP gain and right-hand (RH) CP gain are -0.40 dBic at 0 mode and -0.66 dBic at +1 mode, respectively, in the azimuthal plane and these results show a good agreement with simulated data.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116602807","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421912
H. Sugiyama, H. Goto, H. Iwasaki
This paper describes the simulated results of the very low profile wearable finger ring antenna made of fabric cloth for BAN use and this antenna was operated at dual band for WLAN and UWB. VSWR less than 2 was obtained at dual band. The mechanism was cleared by the current distributions. The influence of the next finger was made cleared.
{"title":"Wearable dual band antenna made of fabric cloth for BAN use","authors":"H. Sugiyama, H. Goto, H. Iwasaki","doi":"10.1109/APMC.2012.6421912","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421912","url":null,"abstract":"This paper describes the simulated results of the very low profile wearable finger ring antenna made of fabric cloth for BAN use and this antenna was operated at dual band for WLAN and UWB. VSWR less than 2 was obtained at dual band. The mechanism was cleared by the current distributions. The influence of the next finger was made cleared.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125260787","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 : 2012-12-01DOI: 10.1109/APMC.2012.6421699
R. Snyder
With usable RF spectrum as one of the most expensive-and usually unavailable-natural resources, frequency subdivision techniques are critically important for protection of both the content producer and the consumer. The use of filters to provide walls to ensure isolation of users from one another is common, but the design of such filters is difficult because of proximity. With spectrum more costly than hardware, the ordered metrics for filters are performance, size, reliability, and lastly, selling cost. In this paper we will discuss topology and manufacturing technology for the more recent approaches to implementation of such filters.
{"title":"Filter design for modern communication systems","authors":"R. Snyder","doi":"10.1109/APMC.2012.6421699","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421699","url":null,"abstract":"With usable RF spectrum as one of the most expensive-and usually unavailable-natural resources, frequency subdivision techniques are critically important for protection of both the content producer and the consumer. The use of filters to provide walls to ensure isolation of users from one another is common, but the design of such filters is difficult because of proximity. With spectrum more costly than hardware, the ordered metrics for filters are performance, size, reliability, and lastly, selling cost. In this paper we will discuss topology and manufacturing technology for the more recent approaches to implementation of such filters.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125673216","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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