Pub Date : 2015-10-01DOI: 10.1109/ICCPS.2015.7454190
Zhiyong Guo, D. Jiang, Hui Chen
Special areas such as microwave radar, guidance and communication systems should achieve dynamic frequency selection and dynamic power distribution in the broadband range. The tunable filtering-power divider can not only achieve dynamic frequency selection and power distribution, but also downsize the system. By electrifying the upper and lower surface electrode of the liquid crystal (LC) and changing the voltage value to result in the change of the LC pointing vectors so as to alter the effective dielectric constant of LC substrate, the center frequency of filtering-power divider can be tuned to achieve the high-speed dynamic frequency selection and power division. Thus, miniaturization and lightweight of the electronic system can be brought about with efficiency.
{"title":"A compact tunable filtering-power divider based on liquid crystal","authors":"Zhiyong Guo, D. Jiang, Hui Chen","doi":"10.1109/ICCPS.2015.7454190","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454190","url":null,"abstract":"Special areas such as microwave radar, guidance and communication systems should achieve dynamic frequency selection and dynamic power distribution in the broadband range. The tunable filtering-power divider can not only achieve dynamic frequency selection and power distribution, but also downsize the system. By electrifying the upper and lower surface electrode of the liquid crystal (LC) and changing the voltage value to result in the change of the LC pointing vectors so as to alter the effective dielectric constant of LC substrate, the center frequency of filtering-power divider can be tuned to achieve the high-speed dynamic frequency selection and power division. Thus, miniaturization and lightweight of the electronic system can be brought about with efficiency.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117268377","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454085
Hao Li, F. Huang, Youming Zhang, Xiaoyu Wang
This paper discusses a 6.3-6.8GHz single-ended-to-differential LNA with noise-cancelling and adjacent channel rejection for wideband mobile communication. Different from traditional noise-cancelling LNA, this circuit includes local feedback, current reuse and considering bond-wire effect. Besides, this design utilizes a couple of differential-to-single buffers to reduce the mismatch of the differential signal output from single-ended-to-differential LNA. Bond-wire inductance and ESD is inevitable for the chip, but they usually bring about some negative effects. However bond-wire inductance can also be used for impedance matching and acting as current-source. To boost the LNA performance, the layout should be optimized to minimize the device and interconnection parasitic effects. Fabricated in a TSMC 0.13μm RF CMOS process, the LNA achieves a gain of 25dB and a NF of 2.0 dB over the band. It consumes 7.8mA from 1.2V supply and occupies an area of 0.5mm2.
{"title":"A 6.3–6.8GHz LNA with noise cancelling and adjacent channel rejection for wideband mobile communication","authors":"Hao Li, F. Huang, Youming Zhang, Xiaoyu Wang","doi":"10.1109/ICCPS.2015.7454085","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454085","url":null,"abstract":"This paper discusses a 6.3-6.8GHz single-ended-to-differential LNA with noise-cancelling and adjacent channel rejection for wideband mobile communication. Different from traditional noise-cancelling LNA, this circuit includes local feedback, current reuse and considering bond-wire effect. Besides, this design utilizes a couple of differential-to-single buffers to reduce the mismatch of the differential signal output from single-ended-to-differential LNA. Bond-wire inductance and ESD is inevitable for the chip, but they usually bring about some negative effects. However bond-wire inductance can also be used for impedance matching and acting as current-source. To boost the LNA performance, the layout should be optimized to minimize the device and interconnection parasitic effects. Fabricated in a TSMC 0.13μm RF CMOS process, the LNA achieves a gain of 25dB and a NF of 2.0 dB over the band. It consumes 7.8mA from 1.2V supply and occupies an area of 0.5mm2.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116761749","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454154
Jing Wang, W. Cao, Si-min Li, Yue Xinhua, Xi Gao, Yannan Jiang
Conformal traveling wave slot array can be used in radar and communication systems. The cylindrical conformal traveling wave slot array antenna at 35 GHz is designed and calculated in this paper. A 6×48 array antenna is designed by the array antenna theory and the Taylor distribution. At the center frequency 35 GHz, the gain is 25.59 dB with a -17 dB sidelobe level and the beam direction is 45°. From 34.5 GHz to 35.5 GHz, the beam direction is only about 1° maximum difference. The simulation results can provide a design reference for the practical design of cylindrical conformal antennas used on craft.
{"title":"Design and simulation of cylindrical conformal traveling wave slot array antenna at 35GHz","authors":"Jing Wang, W. Cao, Si-min Li, Yue Xinhua, Xi Gao, Yannan Jiang","doi":"10.1109/ICCPS.2015.7454154","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454154","url":null,"abstract":"Conformal traveling wave slot array can be used in radar and communication systems. The cylindrical conformal traveling wave slot array antenna at 35 GHz is designed and calculated in this paper. A 6×48 array antenna is designed by the array antenna theory and the Taylor distribution. At the center frequency 35 GHz, the gain is 25.59 dB with a -17 dB sidelobe level and the beam direction is 45°. From 34.5 GHz to 35.5 GHz, the beam direction is only about 1° maximum difference. The simulation results can provide a design reference for the practical design of cylindrical conformal antennas used on craft.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126642454","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454139
Xudong Dai, Mingzhou Zhan, B. Yan
In this paper, we will present a design of a DDS based frequency synthesizer whose output is 67-83MHz, and which will be used in an X band sweep frequency source as the phase detect frequency of PLL. According to the analysis of DDS structure and operating principle, we can get the output with excellent frequency switching time, low phase noise and extremely tiny resolution. And we can use some methods to make the spurs as small as possible.
{"title":"Design of A DDS based frequency synthesizer","authors":"Xudong Dai, Mingzhou Zhan, B. Yan","doi":"10.1109/ICCPS.2015.7454139","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454139","url":null,"abstract":"In this paper, we will present a design of a DDS based frequency synthesizer whose output is 67-83MHz, and which will be used in an X band sweep frequency source as the phase detect frequency of PLL. According to the analysis of DDS structure and operating principle, we can get the output with excellent frequency switching time, low phase noise and extremely tiny resolution. And we can use some methods to make the spurs as small as possible.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126691011","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454133
Shao-Yu Tang, Xing Jiang, Xiao-feng Li
A dual-circularly polarized microstrip antenna was designed by using cross slot coupling structure. The orthogonal slot coupled feeding structure not only broadens the bandwidth, but also avoids the problem of complex feed network in the design of antenna. The circularly polarized axial ratio can be improved effectively by a similar slot coinciding with the cross slots on the circular radiation patch. Two feeding ports were introduced to broaden the AR bandwidth, and respectively achieve left-hand circular polarization and right-hand circular polarization. Reflecting plate layer in the antenna structure improves the gain of antenna significantly. With the help of CST microwave simulation software, the result shows that: the gain of the antenna reaches 7.3 dB and the circularly polarized antenna has a 3-dB axial ratio (AR) bandwidth of 11.3% and a -10-dB impedance bandwidth of 18.1%. The antenna was constructed and measured with its measured results compared to its simulated ones. Reasonable good agreements are observed between the measurement and simulation. As a result of the feeding structure symmetry, the antenna can be used in conformal array antenna, achieving the purpose of reducing cross polarization by different feeding weight.
{"title":"Design of dual-circularly polarized antenna with cross slot coupling","authors":"Shao-Yu Tang, Xing Jiang, Xiao-feng Li","doi":"10.1109/ICCPS.2015.7454133","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454133","url":null,"abstract":"A dual-circularly polarized microstrip antenna was designed by using cross slot coupling structure. The orthogonal slot coupled feeding structure not only broadens the bandwidth, but also avoids the problem of complex feed network in the design of antenna. The circularly polarized axial ratio can be improved effectively by a similar slot coinciding with the cross slots on the circular radiation patch. Two feeding ports were introduced to broaden the AR bandwidth, and respectively achieve left-hand circular polarization and right-hand circular polarization. Reflecting plate layer in the antenna structure improves the gain of antenna significantly. With the help of CST microwave simulation software, the result shows that: the gain of the antenna reaches 7.3 dB and the circularly polarized antenna has a 3-dB axial ratio (AR) bandwidth of 11.3% and a -10-dB impedance bandwidth of 18.1%. The antenna was constructed and measured with its measured results compared to its simulated ones. Reasonable good agreements are observed between the measurement and simulation. As a result of the feeding structure symmetry, the antenna can be used in conformal array antenna, achieving the purpose of reducing cross polarization by different feeding weight.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127037752","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454145
Xi Chen, R. Xu, Yuehang Xu
In this paper, a novel nonlinear thermal resistance extraction method for Gallium Nitride (GaN) high electron-mobility transistors (HEMTs) is presented. Pulsed I-V measurements were performed at different ambient temperatures to extract the relationship between transistor's channel currents and channel temperature under various power dissipations. The temperature-dependent access resistances which play a vital role to the channel currents was also extracted. By using the extracted current-temperature relationship and access resistances, current differences between DC I-V and pulsed I-V were translated into channel temperature differences versus device power dissipations, from which the nonlinear channel thermal resistance was determined. This extraction method was applied to a 400 μm gate widths GaN HEMTs. Finite element analysis (FEA) was also employed for the verification purposes. Results show that this extraction approach can provide accurate power-dependent thermal resistance which is important for GaN HEMTs modeling and reliability assessment.
{"title":"An improved nonlinear thermal resistance extraction method for AlGaN/GaN HEMTs","authors":"Xi Chen, R. Xu, Yuehang Xu","doi":"10.1109/ICCPS.2015.7454145","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454145","url":null,"abstract":"In this paper, a novel nonlinear thermal resistance extraction method for Gallium Nitride (GaN) high electron-mobility transistors (HEMTs) is presented. Pulsed I-V measurements were performed at different ambient temperatures to extract the relationship between transistor's channel currents and channel temperature under various power dissipations. The temperature-dependent access resistances which play a vital role to the channel currents was also extracted. By using the extracted current-temperature relationship and access resistances, current differences between DC I-V and pulsed I-V were translated into channel temperature differences versus device power dissipations, from which the nonlinear channel thermal resistance was determined. This extraction method was applied to a 400 μm gate widths GaN HEMTs. Finite element analysis (FEA) was also employed for the verification purposes. Results show that this extraction approach can provide accurate power-dependent thermal resistance which is important for GaN HEMTs modeling and reliability assessment.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124830368","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454076
XingYuan Ma
This paper presents the unilateral fin-line coupler designed in two different structures, including the ring hybrid and coupled slot in W band. Using even-odd mode technique, 3 dB couplers are designed for the power allocation or compound in millimeter-wave circuits. The simulation indicates the results in W band are close to the theoretical analysis. The method can be applied in designing unilateral fin-line circuits.
{"title":"Unilateral fin-line 3 dB coupler in W-band","authors":"XingYuan Ma","doi":"10.1109/ICCPS.2015.7454076","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454076","url":null,"abstract":"This paper presents the unilateral fin-line coupler designed in two different structures, including the ring hybrid and coupled slot in W band. Using even-odd mode technique, 3 dB couplers are designed for the power allocation or compound in millimeter-wave circuits. The simulation indicates the results in W band are close to the theoretical analysis. The method can be applied in designing unilateral fin-line circuits.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122150833","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454221
Hui Chen, D. Jiang, Yinglu Wan
A miniaturized and low insertion loss (IL) wideband bandpass filter (BPF) using a modified square patch resonator with dual-mode feature is presented in this paper. The proposed dual-mode resonator is composed of a side-slit square patch loaded by two L-shaped open-circuited stubs. Simulated results from the electromagnetic (EM) analysis software and measured results show good agreement and excellent performance over the frequency range, including the 3-dB fractional bandwidth (FBW) up to 34.2%, minimum insertion loss 0.64dB, and the 2nd harmonic suppression better than 33dB.
{"title":"A miniature low-loss wideband dual-mode BPF with harmonic suppression","authors":"Hui Chen, D. Jiang, Yinglu Wan","doi":"10.1109/ICCPS.2015.7454221","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454221","url":null,"abstract":"A miniaturized and low insertion loss (IL) wideband bandpass filter (BPF) using a modified square patch resonator with dual-mode feature is presented in this paper. The proposed dual-mode resonator is composed of a side-slit square patch loaded by two L-shaped open-circuited stubs. Simulated results from the electromagnetic (EM) analysis software and measured results show good agreement and excellent performance over the frequency range, including the 3-dB fractional bandwidth (FBW) up to 34.2%, minimum insertion loss 0.64dB, and the 2nd harmonic suppression better than 33dB.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131379933","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454088
Liu Bing, Yang Peng, Yang Feng, Dong Tao
Unlike the radar and communication system, the received signal quality in global navigation satellite system (GNSS) receivers is measured by the post-correlation carrier-to-noise-ratio (C/N0) rather than signal-to-interference-plus-noise-ratio (SINR). This paper proposed a blind adaptive beamforming algorithm based on Max C/N0 criterion. Additionally, the performance difference between algorithms based on Max SINR criterion and Max C/N0 criterion is analyzed in the presence of interference. It is demonstrated that, algorithms based on Max C/N0 criterion can significantly improve post-correlation C/N0.
{"title":"Comparison of adaptive beam forming algorithms based on max SINR criterion and Max C/N0 criterion","authors":"Liu Bing, Yang Peng, Yang Feng, Dong Tao","doi":"10.1109/ICCPS.2015.7454088","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454088","url":null,"abstract":"Unlike the radar and communication system, the received signal quality in global navigation satellite system (GNSS) receivers is measured by the post-correlation carrier-to-noise-ratio (C/N0) rather than signal-to-interference-plus-noise-ratio (SINR). This paper proposed a blind adaptive beamforming algorithm based on Max C/N0 criterion. Additionally, the performance difference between algorithms based on Max SINR criterion and Max C/N0 criterion is analyzed in the presence of interference. It is demonstrated that, algorithms based on Max C/N0 criterion can significantly improve post-correlation C/N0.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125695083","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 : 2015-10-01DOI: 10.1109/ICCPS.2015.7454199
Na Li, Hua Zha, Jianqiang Hou, Z. Lei, He Fei
Based on Simplifying the antenna modes through the application of characteristic modes approach, we propose a novel method which synthesize the Gauss filter to design antenna equivalent circuit. We take the dipole antenna as an example to expound the method. Firstly, from the analysis of the characteristic modes approach, mode 1 and mode 3 are found to be the main radiation modes for a dipole antenna. And then, band pass filter equivalent circuits are designed in the light of the modal coefficient graph of each mode. Finally the two band pass filter equivalent circuits of mode 1 and mode 3 can be combined in parallel to be the equivalent circuit of the dipole antenna. The simulation results of the equivalent circuit are quite consistent with the original antenna for the bandwidth and impedance.
{"title":"Gauss filter circuit equivalent model of antenna with characteristic modes approach","authors":"Na Li, Hua Zha, Jianqiang Hou, Z. Lei, He Fei","doi":"10.1109/ICCPS.2015.7454199","DOIUrl":"https://doi.org/10.1109/ICCPS.2015.7454199","url":null,"abstract":"Based on Simplifying the antenna modes through the application of characteristic modes approach, we propose a novel method which synthesize the Gauss filter to design antenna equivalent circuit. We take the dipole antenna as an example to expound the method. Firstly, from the analysis of the characteristic modes approach, mode 1 and mode 3 are found to be the main radiation modes for a dipole antenna. And then, band pass filter equivalent circuits are designed in the light of the modal coefficient graph of each mode. Finally the two band pass filter equivalent circuits of mode 1 and mode 3 can be combined in parallel to be the equivalent circuit of the dipole antenna. The simulation results of the equivalent circuit are quite consistent with the original antenna for the bandwidth and impedance.","PeriodicalId":319991,"journal":{"name":"2015 IEEE International Conference on Communication Problem-Solving (ICCP)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116502912","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：