Pub Date : 2012-12-01DOI: 10.1109/APMC.2012.6421614
Ya-Wen Yang, H. Su, Ken-Huang Lin, Hung-Hsuan Lin, Chin-Yih Wu
This paper presents a miniature implanted antenna operated at medical implant communication systems (MICS) band (402-405 MHz) with the dimension of 40×10×1.905 mm3 for biotelemetry. The antenna is fabricated on biocompatible Ceramic Alumina substrates. For simplicity three □ layer human tissues are adopted first. With the special arrangement of the antenna structure, a spiral □ like current distribution is excited and the corresponding electromagnetic wave can be radiated toward the outside of the human body. The antenna achieves a gain of -21.7 dBi, capable of extending the battery life. Furthermore, the frequency response is insensitive to the change of the implanted environment. Finally, a complete human model is used and the results are similar.
{"title":"Spiral-like implanted antenna for biotelemetry","authors":"Ya-Wen Yang, H. Su, Ken-Huang Lin, Hung-Hsuan Lin, Chin-Yih Wu","doi":"10.1109/APMC.2012.6421614","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421614","url":null,"abstract":"This paper presents a miniature implanted antenna operated at medical implant communication systems (MICS) band (402-405 MHz) with the dimension of 40×10×1.905 mm3 for biotelemetry. The antenna is fabricated on biocompatible Ceramic Alumina substrates. For simplicity three □ layer human tissues are adopted first. With the special arrangement of the antenna structure, a spiral □ like current distribution is excited and the corresponding electromagnetic wave can be radiated toward the outside of the human body. The antenna achieves a gain of -21.7 dBi, capable of extending the battery life. Furthermore, the frequency response is insensitive to the change of the implanted environment. Finally, a complete human model is used and the results are similar.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"52 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":"132635732","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.2012.6421660
A. K. Horestani, Z. Shaterian, S. Al-Sarawi, D. Abbott, C. Fumeaux
In this paper complementary spiral resonators are used in the design of compact planar bandpass filters with wide upper stopband. Based on an inductively loaded transmission line model for the complementary spiral resonators it is shown that the ratio of the spurious resonant frequency to the fundamental resonant frequency can be increased. Comparing two filters realized by conventional open-loop resonators and complementary spiral resonators it is shown that the utilization of complementary spiral resonators not only results in a more compact filter but also that a wide upper stopband is achieved.
{"title":"Miniaturized bandpass filter with wide stopband using complementary spiral resonator","authors":"A. K. Horestani, Z. Shaterian, S. Al-Sarawi, D. Abbott, C. Fumeaux","doi":"10.1109/APMC.2012.6421660","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421660","url":null,"abstract":"In this paper complementary spiral resonators are used in the design of compact planar bandpass filters with wide upper stopband. Based on an inductively loaded transmission line model for the complementary spiral resonators it is shown that the ratio of the spurious resonant frequency to the fundamental resonant frequency can be increased. Comparing two filters realized by conventional open-loop resonators and complementary spiral resonators it is shown that the utilization of complementary spiral resonators not only results in a more compact filter but also that a wide upper stopband is achieved.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"602 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":"133949052","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.2012.6421518
Chan-Keong Chio, S. Ting, Xunwang Zhao, K. Tam
A compact dual-band bandpass filter with an improved upper stopband using defected ground structure is proposed. This filter offers quasi-elliptic responses at both the passbands, and the upper-stopband performance is improved by using end-coupled microstrip lines loaded with non-uniform shunt open stubs. An example dual-band bandpass filter is designed to demonstrate the effectiveness of the approach. The measurement shows a very good agreement with the simulation results. In addition, the implemented dual-band quasi-elliptic filter has a compact size of 0.24λ × 0.19λ and a wide stopband of better than 35-dB attenuation from 4.8 GHz to 9 GHz.
{"title":"Compact dual-band quasi-elliptic bandpass filter with improved upper-stopband performance","authors":"Chan-Keong Chio, S. Ting, Xunwang Zhao, K. Tam","doi":"10.1109/APMC.2012.6421518","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421518","url":null,"abstract":"A compact dual-band bandpass filter with an improved upper stopband using defected ground structure is proposed. This filter offers quasi-elliptic responses at both the passbands, and the upper-stopband performance is improved by using end-coupled microstrip lines loaded with non-uniform shunt open stubs. An example dual-band bandpass filter is designed to demonstrate the effectiveness of the approach. The measurement shows a very good agreement with the simulation results. In addition, the implemented dual-band quasi-elliptic filter has a compact size of 0.24λ × 0.19λ and a wide stopband of better than 35-dB attenuation from 4.8 GHz to 9 GHz.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"12 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":"131856373","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.2012.6421875
S. Jang, Heng-Fa Teng, Wei-Hao Lee, Chia-Wei Chang
This letter presents a novel complementary low phase noise differential CMOS Hartley voltage-controlled oscillator (VCO), which uses only the supply voltage and the tuning voltage as the biases. The low noise CMOS VCO has been implemented with the TSMC 0.18 um 1P6M polycide CMOS technology. The VCO operates from 5.49 GHz to 6.29 GHz with 13.58% tuning range. The measured phase noise at 1-MHz offset is -118.42 dBc/Hz at 5.65 GHz. The power consumption of the VCO core is 1.694 mW. The VCO occupies a chip area of 0.529 × 0.674 mm2 and provides a figure of merit of -191.09 dBc/Hz. At the supply voltage of 1.1V, the core current of 1.54 mA, the core power consumption is 1.694 mW.
{"title":"A differential complementary hartley CMOS voltage controlled oscillator","authors":"S. Jang, Heng-Fa Teng, Wei-Hao Lee, Chia-Wei Chang","doi":"10.1109/APMC.2012.6421875","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421875","url":null,"abstract":"This letter presents a novel complementary low phase noise differential CMOS Hartley voltage-controlled oscillator (VCO), which uses only the supply voltage and the tuning voltage as the biases. The low noise CMOS VCO has been implemented with the TSMC 0.18 um 1P6M polycide CMOS technology. The VCO operates from 5.49 GHz to 6.29 GHz with 13.58% tuning range. The measured phase noise at 1-MHz offset is -118.42 dBc/Hz at 5.65 GHz. The power consumption of the VCO core is 1.694 mW. The VCO occupies a chip area of 0.529 × 0.674 mm2 and provides a figure of merit of -191.09 dBc/Hz. At the supply voltage of 1.1V, the core current of 1.54 mA, the core power consumption is 1.694 mW.","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":"131875119","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.2012.6421770
A. Doghri, A. Ghiotto, T. Djerafi, K. Wu
In this paper, corrugated SIW L-folded antipodal parabolic Tapered Slot Antenna (TSA) is proposed and demonstrated for the very first time. Compared to other reported SIW TSA, this design achieves foot-print reduction by a factor of nearly two and excellent radiation pattern symmetry. This structure can easily be designed to obtain either 45° or -45° polarization. Moreover, this single element shows advantages over other reported end-fire TSA for arrays, namely, it can achieve a lower spacing between elements to obtain reduced side-lobe level (SLL) and 45° or -45° polarizations as well as reduced coupling between adjacent elements. To feed this antenna, an L-Folded SIW (LFSIW) line is introduced. An L-junction from SIW to LFSIW is also proposed and studied. The gain of single L-folded element is 13 dBi compared to 15.1 dBi for the unfolded antenna. However, the folded antenna provides an 8.5 dB improvement in the coupling level between adjacent elements.
{"title":"Corrugated SIW L-folded antipodal parabolic tapered slot antenna","authors":"A. Doghri, A. Ghiotto, T. Djerafi, K. Wu","doi":"10.1109/APMC.2012.6421770","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421770","url":null,"abstract":"In this paper, corrugated SIW L-folded antipodal parabolic Tapered Slot Antenna (TSA) is proposed and demonstrated for the very first time. Compared to other reported SIW TSA, this design achieves foot-print reduction by a factor of nearly two and excellent radiation pattern symmetry. This structure can easily be designed to obtain either 45° or -45° polarization. Moreover, this single element shows advantages over other reported end-fire TSA for arrays, namely, it can achieve a lower spacing between elements to obtain reduced side-lobe level (SLL) and 45° or -45° polarizations as well as reduced coupling between adjacent elements. To feed this antenna, an L-Folded SIW (LFSIW) line is introduced. An L-junction from SIW to LFSIW is also proposed and studied. The gain of single L-folded element is 13 dBi compared to 15.1 dBi for the unfolded antenna. However, the folded antenna provides an 8.5 dB improvement in the coupling level between adjacent elements.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"6 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":"134394772","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.2012.6421706
Kuo-Fong Hung, S. Fang
A dual-polarized slot loop antenna fed by microstrip line is proposed. The dual-polarized slot loop antenna with dual radiating modes including microstrip line- and slotline-mode are excited by a wideband microstrip/slotline transition and a capacitively coupled “T” configuration stub, respectively, which are employed to enhance the impedance bandwidth. The planar design makes the antenna easy to integrate with RF circuitry on the same board. The slot loop antenna occupies an area of 12 × 18 mm2. From the measured data, the 25-dB port-to-port isolation of the antenna can be achieved. Also, the 10-dB return-loss impedance bandwidths of 32% and 67%, respectively, are obtained. Improved cross polarization level in both E-and H-plane patterns between the two polarizations about 20dB.
{"title":"Broadband dual-polarized slot loop antennas with high isolation orthogonal modes operation","authors":"Kuo-Fong Hung, S. Fang","doi":"10.1109/APMC.2012.6421706","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421706","url":null,"abstract":"A dual-polarized slot loop antenna fed by microstrip line is proposed. The dual-polarized slot loop antenna with dual radiating modes including microstrip line- and slotline-mode are excited by a wideband microstrip/slotline transition and a capacitively coupled “T” configuration stub, respectively, which are employed to enhance the impedance bandwidth. The planar design makes the antenna easy to integrate with RF circuitry on the same board. The slot loop antenna occupies an area of 12 × 18 mm2. From the measured data, the 25-dB port-to-port isolation of the antenna can be achieved. Also, the 10-dB return-loss impedance bandwidths of 32% and 67%, respectively, are obtained. Improved cross polarization level in both E-and H-plane patterns between the two polarizations about 20dB.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"171 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":"133535257","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.2012.6421904
B. Ren, Shiyong Li, Houjun Sun
Planar array two dimensional (2D) imaging is an important technology. It saves scanning time, but needs a large number of antenna elements. In order to save the cost, we hope to use less antennas to get the same (or better) image results. In this paper, we use sparse planar array and reconstruct the image by the two dimensional fast smoothed L0 (2D-SL0) algorithm. Paraxial Green function is used as sensing matrix. Comparisons of the algorithms based on 2D-SL0 algorithm and the matched filter processing (MFP) are demonstrated by means of numerical simulations. It is obvious that the imaging results by the 2D-SL0 algorithm is much clearer. And the focusing performance of the algorithm based on the 2D-SL0 algorithm is very well, even when we use the sparse antenna array.
{"title":"An algorithm based on the compressed sensing for near range two dimensional imaging","authors":"B. Ren, Shiyong Li, Houjun Sun","doi":"10.1109/APMC.2012.6421904","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421904","url":null,"abstract":"Planar array two dimensional (2D) imaging is an important technology. It saves scanning time, but needs a large number of antenna elements. In order to save the cost, we hope to use less antennas to get the same (or better) image results. In this paper, we use sparse planar array and reconstruct the image by the two dimensional fast smoothed L0 (2D-SL0) algorithm. Paraxial Green function is used as sensing matrix. Comparisons of the algorithms based on 2D-SL0 algorithm and the matched filter processing (MFP) are demonstrated by means of numerical simulations. It is obvious that the imaging results by the 2D-SL0 algorithm is much clearer. And the focusing performance of the algorithm based on the 2D-SL0 algorithm is very well, even when we use the sparse antenna array.","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":"133834547","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.2012.6421565
Ko-Wen Hsu, Jui-Hsiang Lin, Wen‐Hua Tu
A compact microstrip broadband bandpass filter with harmonic suppression is proposed. The bandwidth of the proposed wide-band filter is from 0.96 to 3.41 GHz and the 3-dB fractional bandwidth is 135%. Without increasing additional circuit size, a technique which involves embedded open stubs is used to suppress undesired high frequency harmonics. By cascading the embedded open stubs periodically in the connecting lines, the bandwidth of the stopband response can be enhanced. The frequencies of the open stubs can be arranged at the harmonic position for suppressing the undesired response.
{"title":"Compact microstrip broadband bandpass filter with harmonic suppression based on embedded resonators","authors":"Ko-Wen Hsu, Jui-Hsiang Lin, Wen‐Hua Tu","doi":"10.1109/APMC.2012.6421565","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421565","url":null,"abstract":"A compact microstrip broadband bandpass filter with harmonic suppression is proposed. The bandwidth of the proposed wide-band filter is from 0.96 to 3.41 GHz and the 3-dB fractional bandwidth is 135%. Without increasing additional circuit size, a technique which involves embedded open stubs is used to suppress undesired high frequency harmonics. By cascading the embedded open stubs periodically in the connecting lines, the bandwidth of the stopband response can be enhanced. The frequencies of the open stubs can be arranged at the harmonic position for suppressing the undesired response.","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":"124802458","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.2012.6421499
Y. Mao, Cong Wang, Fan Yang, A. Elsherbeni
To satisfy the dual-band dual-polarization requirements of satellite communications, this paper presents a single layer reflectarray design using a novel dual-frequency phase synthesis method. In this design, a ring-patch structure is used as the reflectarray element, and its phase responses at two center frequencies are synthesized to optimize the reflectarray performanceat two target bands (12.25-12.75 GHz and 14.0-14.5 GHz). The dual-frequency phase synthesis method is illustrated in details, and the designed results show a broadband performance that covers thefrequency range from 12.25-14.5GHz.
{"title":"A single-layer broad-band reflectarray design using dual-frequency phase synthesis method","authors":"Y. Mao, Cong Wang, Fan Yang, A. Elsherbeni","doi":"10.1109/APMC.2012.6421499","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421499","url":null,"abstract":"To satisfy the dual-band dual-polarization requirements of satellite communications, this paper presents a single layer reflectarray design using a novel dual-frequency phase synthesis method. In this design, a ring-patch structure is used as the reflectarray element, and its phase responses at two center frequencies are synthesized to optimize the reflectarray performanceat two target bands (12.25-12.75 GHz and 14.0-14.5 GHz). The dual-frequency phase synthesis method is illustrated in details, and the designed results show a broadband performance that covers thefrequency range from 12.25-14.5GHz.","PeriodicalId":359125,"journal":{"name":"2012 Asia Pacific Microwave Conference Proceedings","volume":"2019 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":"131676736","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.2012.6421662
Y. Lai, Shi-Chang Zhang, Xilin Wei, Yong-ming Tan
Numerical simulations are carried out to investigate the effect of defect location and corrugation phase on transmission in a defected coaxial Bragg structure with two corrugated surfaces. It is found that, the desired narrow passband can be generated only if the outer-wall and inner-rod ripples are both applied with a defect in the middle-section and their initial corrugation phase difference is set to π. A slight misalignment between the outer-wall and the inner-rod defect can be used to perform a fine adjustment on the characters of pass-band; however, if these defects are separated with a lager gap, several passbands can be generated, which provides a potential approach to construct multi-channel filters.
{"title":"Effect of defect location and corrugation phase on transmission in a defected coaxial Bragg structure with two corrugated surfaces","authors":"Y. Lai, Shi-Chang Zhang, Xilin Wei, Yong-ming Tan","doi":"10.1109/APMC.2012.6421662","DOIUrl":"https://doi.org/10.1109/APMC.2012.6421662","url":null,"abstract":"Numerical simulations are carried out to investigate the effect of defect location and corrugation phase on transmission in a defected coaxial Bragg structure with two corrugated surfaces. It is found that, the desired narrow passband can be generated only if the outer-wall and inner-rod ripples are both applied with a defect in the middle-section and their initial corrugation phase difference is set to π. A slight misalignment between the outer-wall and the inner-rod defect can be used to perform a fine adjustment on the characters of pass-band; however, if these defects are separated with a lager gap, several passbands can be generated, which provides a potential approach to construct multi-channel filters.","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":"132295333","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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