Pub Date : 2012-12-01DOI: 10.1109/APMC.2012.6421593
T. Aoyagi, K. Suzaki, Y. Suzuki, T. Hirose, T. Sugiyama
In maritime mobile satellite communications, received satellite signal level varies due to direction and motion of a ship. Then sometimes the communications are interrupted, because the receiving satellite signal level decreases when the ship's body shadows the antenna. Thus it is important to evaluate how qualities of satellite communications vary during ship operations. However, precise temporal level fluctuations during ship movement are not yet studied. In this paper, to evaluate temporal variances of receiving satellite signal level of the ship in motion, modeling and numerical simulations were performed with considering the effect that the ship's body shadows the antennas. Effects of pitching, rolling and yawing were taken into accounting the calculations. In addition, electric field levels around the ship were estimated when transmitting antennas are in proximity to the ship body.
{"title":"Wave propagation simulations for considering the installation of the maritime mobile satellite communication antennas","authors":"T. Aoyagi, K. Suzaki, Y. Suzuki, T. Hirose, T. Sugiyama","doi":"10.1109/APMC.2012.6421593","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421593","url":null,"abstract":"In maritime mobile satellite communications, received satellite signal level varies due to direction and motion of a ship. Then sometimes the communications are interrupted, because the receiving satellite signal level decreases when the ship's body shadows the antenna. Thus it is important to evaluate how qualities of satellite communications vary during ship operations. However, precise temporal level fluctuations during ship movement are not yet studied. In this paper, to evaluate temporal variances of receiving satellite signal level of the ship in motion, modeling and numerical simulations were performed with considering the effect that the ship's body shadows the antennas. Effects of pitching, rolling and yawing were taken into accounting the calculations. In addition, electric field levels around the ship were estimated when transmitting antennas are in proximity to the ship body.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"8 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":"127113338","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.2012.6421538
T. Takagi, E. Nakayama, T. Ta, S. Kameda, N. Suematsu, K. Tsubouchi
A novel planar type broadband balun having a symmetrical structure has been proposed. Considering a lossless and uniform material, balun operation is analyzed and impedance matching condition is formulated. Applying the proposed balun configuration, and using CMOS multi-layer structure, a CMOS on-chip balun has been fabricated. The fabricated balun has achieved ultra-broadband performance. Measured characteristics of the balun are return loss of more than 8dB, insertion loss of 1.5 ~ 6.3dB from the unbalanced to the balanced ports, and the amplitude difference and phase difference between the balanced ports of -0.2 ~ +1.5dB and 173.5 ~ 179deg, respectively, over the frequency range of 13 ~ 110GHz.
{"title":"A novel planar type broadband CMOS on-chip balun with relative bandwidth of 158%","authors":"T. Takagi, E. Nakayama, T. Ta, S. Kameda, N. Suematsu, K. Tsubouchi","doi":"10.1109/APMC.2012.6421538","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421538","url":null,"abstract":"A novel planar type broadband balun having a symmetrical structure has been proposed. Considering a lossless and uniform material, balun operation is analyzed and impedance matching condition is formulated. Applying the proposed balun configuration, and using CMOS multi-layer structure, a CMOS on-chip balun has been fabricated. The fabricated balun has achieved ultra-broadband performance. Measured characteristics of the balun are return loss of more than 8dB, insertion loss of 1.5 ~ 6.3dB from the unbalanced to the balanced ports, and the amplitude difference and phase difference between the balanced ports of -0.2 ~ +1.5dB and 173.5 ~ 179deg, respectively, over the frequency range of 13 ~ 110GHz.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"122 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":"127501161","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.2012.6421611
Yu-Lin Yang, Chi-Lin Tsai, Ching-Wen Yang, Chin-Lung Yang
This paper presents a novel wireless power transmission (WPT) technique by using pulse width modulation (PWM) and pulse waveform modulation (PWFM). Instead of using continuous wave for WPT, we could enhance the output voltage (Vout) and power conversion efficiency (PCE) of RF-DC rectifier by adjusting duty cycles and waveforms. We could determine the optimal duty cycle and waveforms to achieve the best performance according to the current through the load. Therefore, the PCE can be improved under constraint of low input power for biomedical applications. The WPT system and biomedical WPT system were established to perform wireless biomedical experimental verification. From the measurement, the PCE applying to a LED load can be improved by more than 30% at input power of -6 dBm with PWM WPT, and the PCE can be improved by 2.5 times by using PWFM WPT for biomedical applications.
{"title":"Using pulse width and waveform modulation to enhance power conversion efficiency under constraint of low input power","authors":"Yu-Lin Yang, Chi-Lin Tsai, Ching-Wen Yang, Chin-Lung Yang","doi":"10.1109/APMC.2012.6421611","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421611","url":null,"abstract":"This paper presents a novel wireless power transmission (WPT) technique by using pulse width modulation (PWM) and pulse waveform modulation (PWFM). Instead of using continuous wave for WPT, we could enhance the output voltage (Vout) and power conversion efficiency (PCE) of RF-DC rectifier by adjusting duty cycles and waveforms. We could determine the optimal duty cycle and waveforms to achieve the best performance according to the current through the load. Therefore, the PCE can be improved under constraint of low input power for biomedical applications. The WPT system and biomedical WPT system were established to perform wireless biomedical experimental verification. From the measurement, the PCE applying to a LED load can be improved by more than 30% at input power of -6 dBm with PWM WPT, and the PCE can be improved by 2.5 times by using PWFM WPT for biomedical applications.","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":"123574804","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.2012.6421532
T. Kaho, Y. Yamaguchi, H. Shiba, K. Akabane, K. Uehara
A dual-band mixer that can receive multiple band signals simultaneously is reported. Using dual local oscillator (LO) signals simultaneously, the mixer achieves independent gain control through relative power control of the signals. Linear conversion gain control is also achieved through dual LO signal input with total LO power control. The new topology using two MOSFETs is adopted without the need for an additional LO power combiner. Test measurement results confirm that the mixer achieves independent and linear conversion gain control in dual-band simultaneous receiving. The new mixer has higher conversion gain than that of the previously reported single MOSFET mixer in the dual-band receiving.
{"title":"A dual-band simultaneous receiving mixer with independent and linear gain control","authors":"T. Kaho, Y. Yamaguchi, H. Shiba, K. Akabane, K. Uehara","doi":"10.1109/APMC.2012.6421532","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421532","url":null,"abstract":"A dual-band mixer that can receive multiple band signals simultaneously is reported. Using dual local oscillator (LO) signals simultaneously, the mixer achieves independent gain control through relative power control of the signals. Linear conversion gain control is also achieved through dual LO signal input with total LO power control. The new topology using two MOSFETs is adopted without the need for an additional LO power combiner. Test measurement results confirm that the mixer achieves independent and linear conversion gain control in dual-band simultaneous receiving. The new mixer has higher conversion gain than that of the previously reported single MOSFET mixer in the dual-band receiving.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"15 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":"125282452","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.2012.6421796
W. Liang, W. Hong, Jixin Chen
A Q-band compact two-way 3dB Wilkinson power divider is developed using asymmetrical shunt-stub and meander lines. The prototype is fabricated in a 90nm CMOS technology. The measurement results, which match the 50 Ω system, reveal an equal power-split with the insertion losses (S21 and S31) of 3.9 ± 0.3dB from 40 to 50 GHz. The return loss at every port (S11, S22 and S33) is better than 12dB from 40 to 50 GHz, and the isolation (S23) is better than 18dB over the same frequency range. The intrinsic area of the prototype is 185 μm × 320 μm without contact pads, which is only 0.059 mm2. Comparison with some previous reported miniaturized on-chip Wilkinson power dividers over other frequency bands is given in the end of this paper.
{"title":"A Q-band compact Wilkinson power divider using asymmetrical shunt-stub in 90nm CMOS technology","authors":"W. Liang, W. Hong, Jixin Chen","doi":"10.1109/APMC.2012.6421796","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421796","url":null,"abstract":"A Q-band compact two-way 3dB Wilkinson power divider is developed using asymmetrical shunt-stub and meander lines. The prototype is fabricated in a 90nm CMOS technology. The measurement results, which match the 50 Ω system, reveal an equal power-split with the insertion losses (S21 and S31) of 3.9 ± 0.3dB from 40 to 50 GHz. The return loss at every port (S11, S22 and S33) is better than 12dB from 40 to 50 GHz, and the isolation (S23) is better than 18dB over the same frequency range. The intrinsic area of the prototype is 185 μm × 320 μm without contact pads, which is only 0.059 mm2. Comparison with some previous reported miniaturized on-chip Wilkinson power dividers over other frequency bands is given in the end of this paper.","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":"126628194","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.2012.6421555
Juan Xu, Xuan Luo, Liangzu Cao, Ru-Shan Chen
This paper introduces a 1/4 wavelength dielectric coaxial resonators as the distributed parameter elements, by a lumped chip capacitor coupled band-pass filter. According to the design of filter technology indicators, determine the type of filter, series, and structure. Then the parallel resonant structure is replaced with a high dielectric constant dielectric coaxial resonator, based on the microwave network theory to calculate the values of the structural parameters of microwave dielectric filter. In microwave filter optimization simulation stage; because the commercial electromagnetic software simulation the cost is huge, filter the whole simulation optimization is a very complicated process. Space mapping method combining circuit optimization speed and electromagnetic simulation accuracy; improve the efficiency of filter design. In the optimization process, we used equivalent circuit model as coarse model in ADS, fine model was simulated in Ansoft HFSS.
{"title":"Optimization of coaxial dielectric resonator filter with aggressive space mapping","authors":"Juan Xu, Xuan Luo, Liangzu Cao, Ru-Shan Chen","doi":"10.1109/APMC.2012.6421555","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421555","url":null,"abstract":"This paper introduces a 1/4 wavelength dielectric coaxial resonators as the distributed parameter elements, by a lumped chip capacitor coupled band-pass filter. According to the design of filter technology indicators, determine the type of filter, series, and structure. Then the parallel resonant structure is replaced with a high dielectric constant dielectric coaxial resonator, based on the microwave network theory to calculate the values of the structural parameters of microwave dielectric filter. In microwave filter optimization simulation stage; because the commercial electromagnetic software simulation the cost is huge, filter the whole simulation optimization is a very complicated process. Space mapping method combining circuit optimization speed and electromagnetic simulation accuracy; improve the efficiency of filter design. In the optimization process, we used equivalent circuit model as coarse model in ADS, fine model was simulated in Ansoft HFSS.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"16 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":"115059518","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.2012.6421496
Lang Wang, J. Li, Shun Yang, Sen Yang, Han-Li Liu, Chuan-Qiu Lei
A function reconfigurable double-helix antenna inspired by DNA is designed. With different lumped elements between the two helixes, the antennas show great function reconfigurability with function 1 as a broadband and high gain antenna, and function 2 as a frequency tunable antenna with a wide tuning range. Each function is discussed in detail. The antenna is circularly polarized. Simulated and measured results of the antenna are observed and analyzed, which show good performance of the two functions.
{"title":"A DNA inspired function reconfigurable double-helix antenna","authors":"Lang Wang, J. Li, Shun Yang, Sen Yang, Han-Li Liu, Chuan-Qiu Lei","doi":"10.1109/APMC.2012.6421496","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421496","url":null,"abstract":"A function reconfigurable double-helix antenna inspired by DNA is designed. With different lumped elements between the two helixes, the antennas show great function reconfigurability with function 1 as a broadband and high gain antenna, and function 2 as a frequency tunable antenna with a wide tuning range. Each function is discussed in detail. The antenna is circularly polarized. Simulated and measured results of the antenna are observed and analyzed, which show good performance of the two functions.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"57 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":"115208132","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.2012.6421586
Li-Chi Chang, Cheng-Hua Tsai, Meng-Sheng Chen, P. Hsu
A dual strip monopole antenna for 2×2 MIMO application is designed using an open strip stub and a parasitic strip, which are respectively employed for band stop filter and pattern diversity. The antenna satisfies the bandwidth requirement of 200 MHz (2.5 to 2.7 GHz) in IEEE 802.16 WiMAX standards, and the in-band isolation between the two monopoles is higher than 20 dB. The proposed design is successfully integrated with SiP (System in Package) and embedded passive components. After system verification, the measured EVM of the WiMAX system is below -30 dB at a 3m distance.
{"title":"A high isolation dual strip monopole antenna","authors":"Li-Chi Chang, Cheng-Hua Tsai, Meng-Sheng Chen, P. Hsu","doi":"10.1109/APMC.2012.6421586","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421586","url":null,"abstract":"A dual strip monopole antenna for 2×2 MIMO application is designed using an open strip stub and a parasitic strip, which are respectively employed for band stop filter and pattern diversity. The antenna satisfies the bandwidth requirement of 200 MHz (2.5 to 2.7 GHz) in IEEE 802.16 WiMAX standards, and the in-band isolation between the two monopoles is higher than 20 dB. The proposed design is successfully integrated with SiP (System in Package) and embedded passive components. After system verification, the measured EVM of the WiMAX system is below -30 dB at a 3m distance.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"30 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":"116058873","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.2012.6421627
Bo Li, Z. Shen
This paper presents a new three-dimensional (3-D) band-pass frequency-selective structure (FSS) with controllable multiple transmission zeros. The proposed FSS consists of a simple array of vertical two-dimensional (2-D) microstrip lines and “T-type” inserted metallic plates, which can be seen as a combination of a 3-D dual-band band-stop FSS and a 3-D bandpass FSS. Based on this combined structure, the operating principle of the proposed FSS is explained and discussed. Simulated results demonstrate that the FSS exhibits wide passband with high selectivity and stable frequency response under a large variation of the incidence angle.
{"title":"Three-dimensional band-pass frequency-selective structure with multiple transmission zeros","authors":"Bo Li, Z. Shen","doi":"10.1109/APMC.2012.6421627","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421627","url":null,"abstract":"This paper presents a new three-dimensional (3-D) band-pass frequency-selective structure (FSS) with controllable multiple transmission zeros. The proposed FSS consists of a simple array of vertical two-dimensional (2-D) microstrip lines and “T-type” inserted metallic plates, which can be seen as a combination of a 3-D dual-band band-stop FSS and a 3-D bandpass FSS. Based on this combined structure, the operating principle of the proposed FSS is explained and discussed. Simulated results demonstrate that the FSS exhibits wide passband with high selectivity and stable frequency response under a large variation of the incidence angle.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"34 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":"122326418","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.2012.6421664
T. Kaneko, R. Matsubara, S. Takagi, Y. Horii
This paper proposes an LTCC-based composite right/left-handed (CRLH) transmission line composed of bandwidth enhanced unit cells (UCs), which suppress the potential difference induced between the parallel-plates of the UC, leading to reduce undesired resonance. By adopting the proposed UC architecture, an original passband from 2.9 GHz to 13.7 GHz is largely enhanced from 2.5 GHz to 23.2 GHz. These theoretical results are verified experimentally by implementing the LTCC models. By utilizing this feature, phase engineering of the right-handed branch is demonstrated.
{"title":"Experimental verification of ultra-wideband multi-layered CRLH transmission lines with bandwidth enhanced unit cells","authors":"T. Kaneko, R. Matsubara, S. Takagi, Y. Horii","doi":"10.1109/APMC.2012.6421664","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421664","url":null,"abstract":"This paper proposes an LTCC-based composite right/left-handed (CRLH) transmission line composed of bandwidth enhanced unit cells (UCs), which suppress the potential difference induced between the parallel-plates of the UC, leading to reduce undesired resonance. By adopting the proposed UC architecture, an original passband from 2.9 GHz to 13.7 GHz is largely enhanced from 2.5 GHz to 23.2 GHz. These theoretical results are verified experimentally by implementing the LTCC models. By utilizing this feature, phase engineering of the right-handed branch is demonstrated.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"82 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":"122412746","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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