Pub Date : 2015-12-01DOI: 10.1109/APMC.2015.7413177
Jianfeng Zhai, Lei Zhang, Zhiqiang Yu, Jianyi Zhou, Xiaowei Zhu
In this paper, the wideband digital predistortion (DPD) and the Zhu's general sampling theorem (ZGST) are applied to compensate the nonlinear characteristics of a wideband RF power amplifier with memory effects. In order to utilize the ZGST, the DPD test bench is carefully designed after analysis with the ZGST. The power amplifiers are excited by a long term evolution advanced signal with up to 100 MHz bandwidth and the memory polynomial model is chosen as the DPD mode after some modifications. The mode parameters are extracted by the standard least square method. Experimental results show that adjacent channel leakage ratio of the PA reaches about -55 dBc with over 10-dB improvement by DPD and the ZGST.
{"title":"Digital predistortion of RF power amplifiers with Zhu's general sampling theorem","authors":"Jianfeng Zhai, Lei Zhang, Zhiqiang Yu, Jianyi Zhou, Xiaowei Zhu","doi":"10.1109/APMC.2015.7413177","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413177","url":null,"abstract":"In this paper, the wideband digital predistortion (DPD) and the Zhu's general sampling theorem (ZGST) are applied to compensate the nonlinear characteristics of a wideband RF power amplifier with memory effects. In order to utilize the ZGST, the DPD test bench is carefully designed after analysis with the ZGST. The power amplifiers are excited by a long term evolution advanced signal with up to 100 MHz bandwidth and the memory polynomial model is chosen as the DPD mode after some modifications. The mode parameters are extracted by the standard least square method. Experimental results show that adjacent channel leakage ratio of the PA reaches about -55 dBc with over 10-dB improvement by DPD and the ZGST.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134309246","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413304
D. Wang, K. Ng, C. Chan
This paper presents a systematic development of microstrip patch antennas for WiGig applications. The size of the antenna is enlarged via the use of high-order mode operation. Shorting pins and slot on the radiating patch are employed to eradicate the associated grading lobes and narrow bandwidth. Symmetric radiation pattern, higher gain and lower cross-polarization level are realized by differentially feeding two mirrored, shorted higher-order mode patches. On the other hand, a single feed antenna with 25% bandwidth is achieved by integrating two mirrored elements into a single antenna.
{"title":"Higher-order mode microstrip antennas for WiGig applications","authors":"D. Wang, K. Ng, C. Chan","doi":"10.1109/APMC.2015.7413304","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413304","url":null,"abstract":"This paper presents a systematic development of microstrip patch antennas for WiGig applications. The size of the antenna is enlarged via the use of high-order mode operation. Shorting pins and slot on the radiating patch are employed to eradicate the associated grading lobes and narrow bandwidth. Symmetric radiation pattern, higher gain and lower cross-polarization level are realized by differentially feeding two mirrored, shorted higher-order mode patches. On the other hand, a single feed antenna with 25% bandwidth is achieved by integrating two mirrored elements into a single antenna.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130743149","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413330
J. Kuo, Ying-chun Wang, Jer-Wei Kuo
Microstrip diplexer is realized with trisection bandpass filters synthesized by frequency-dependent coupling between nonadjacent stepped-impedance resonators. The trisection has a passband response of generalized Chebyshev form with two transmission zeros. The coupling is implemented by sliding both the high- and low-impedance sections to achieve the desired frequency-dependence characteristic at the design frequency. A trisection bandpass Alter at 3.5 GHz and a diplexer with passbands at 3.15 and 3.5 GHz are fabricated and measured. Measured data show good agreement with the simulated responses.
{"title":"Diplexer with trisections synthesized by frequency-dependent coupling","authors":"J. Kuo, Ying-chun Wang, Jer-Wei Kuo","doi":"10.1109/APMC.2015.7413330","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413330","url":null,"abstract":"Microstrip diplexer is realized with trisection bandpass filters synthesized by frequency-dependent coupling between nonadjacent stepped-impedance resonators. The trisection has a passband response of generalized Chebyshev form with two transmission zeros. The coupling is implemented by sliding both the high- and low-impedance sections to achieve the desired frequency-dependence characteristic at the design frequency. A trisection bandpass Alter at 3.5 GHz and a diplexer with passbands at 3.15 and 3.5 GHz are fabricated and measured. Measured data show good agreement with the simulated responses.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130838320","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413333
Zhou Zhenghua, Yang Chun, Cao Zhewei, Chong Yuhua, Zhang Zhizhong
A new approach for the design of an optoelectronic oscillator (OEO) based on an injection-locked (IL) technique is introduced. In the IL OEO, a highly stable microwave reference resource can be used as external frequency reference in IL for side mode suppression and phase noise reduction at low offset frequencies relative to a free running oscillator. With the proposed method, we obtained a highly stable 9.5 GHz microwave signal with the phase noise level of -125 dB/Hz at 1 kHz offset frequency, -143 dBc/Hz at 10 kHz offset frequency, the side mode suppression ratio (SMSR) is larger than 40 dB.
{"title":"Generation of an ultra low phase noise and highly stable optoelectronic oscillator signal using an Injection-locked Technique","authors":"Zhou Zhenghua, Yang Chun, Cao Zhewei, Chong Yuhua, Zhang Zhizhong","doi":"10.1109/APMC.2015.7413333","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413333","url":null,"abstract":"A new approach for the design of an optoelectronic oscillator (OEO) based on an injection-locked (IL) technique is introduced. In the IL OEO, a highly stable microwave reference resource can be used as external frequency reference in IL for side mode suppression and phase noise reduction at low offset frequencies relative to a free running oscillator. With the proposed method, we obtained a highly stable 9.5 GHz microwave signal with the phase noise level of -125 dB/Hz at 1 kHz offset frequency, -143 dBc/Hz at 10 kHz offset frequency, the side mode suppression ratio (SMSR) is larger than 40 dB.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"25 S1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133714433","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 : 2015-12-01DOI: 10.1109/APMC.2015.7411691
Chia-Jui Tsao, Meng-Hua Tu, S. Wu, Cheng-Chang Chen
In this paper, the key point is how to use the loop to couple the signal from DUT. The traditional contacting probe has various disadvantages, such as low-mobility, high-cost, high damaged rate, etc. As a result, we design a high-mobility, well reproducibility, low-cost and broadband CPW square loop-type probe to couple the signal from DUT. Also, the radiation model is extracted by coupling theorem and compared with 3-D EM simulation. The results show the good performance with the model. Thus, it can not only propose the non-contacting measurement but also can be applied to the popular issues of EMI and EMC in the future.
{"title":"Non-contacting signal transmission measurement and modeling by coupling theory","authors":"Chia-Jui Tsao, Meng-Hua Tu, S. Wu, Cheng-Chang Chen","doi":"10.1109/APMC.2015.7411691","DOIUrl":"https://doi.org/10.1109/APMC.2015.7411691","url":null,"abstract":"In this paper, the key point is how to use the loop to couple the signal from DUT. The traditional contacting probe has various disadvantages, such as low-mobility, high-cost, high damaged rate, etc. As a result, we design a high-mobility, well reproducibility, low-cost and broadband CPW square loop-type probe to couple the signal from DUT. Also, the radiation model is extracted by coupling theorem and compared with 3-D EM simulation. The results show the good performance with the model. Thus, it can not only propose the non-contacting measurement but also can be applied to the popular issues of EMI and EMC in the future.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133340130","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413443
Wentao Wu, W. Shan
In this paper, we introduce a novel Superconductor-Insulator-Superconductor (SIS) mixer circuitry based on a series-connected junction (SJ) array. Unlike existing SJ designs, in which each junction is biased at the same DC current. This new design enables each junction to be DC-biased at the same voltage via a set of on-chip bias-T's. Thanks to this parallel DC biasing solution, this circuit design supports a so-called series-connected distributed junction (SDJ) array design, in which LO power non-uniformly spreads along the junction array both in amplitude and in phase. Using this SDJ array, we can realize mm-wave SIS mixers with octave RF band, 15 GHz-wide IF band and high dynamic range required for radio astronomical observation. Simulations of an 80-160GHz SIS mixer design have been made based on this design to support our arguments.
{"title":"A novel mm-wave SIS mixer comprising series-connected junction array and on-chip bias-T","authors":"Wentao Wu, W. Shan","doi":"10.1109/APMC.2015.7413443","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413443","url":null,"abstract":"In this paper, we introduce a novel Superconductor-Insulator-Superconductor (SIS) mixer circuitry based on a series-connected junction (SJ) array. Unlike existing SJ designs, in which each junction is biased at the same DC current. This new design enables each junction to be DC-biased at the same voltage via a set of on-chip bias-T's. Thanks to this parallel DC biasing solution, this circuit design supports a so-called series-connected distributed junction (SDJ) array design, in which LO power non-uniformly spreads along the junction array both in amplitude and in phase. Using this SDJ array, we can realize mm-wave SIS mixers with octave RF band, 15 GHz-wide IF band and high dynamic range required for radio astronomical observation. Simulations of an 80-160GHz SIS mixer design have been made based on this design to support our arguments.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133343615","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 : 2015-12-01DOI: 10.1109/APMC.2015.7411580
Yifan Xiao, L. Ye, G. Cai, Q. Liu
In this paper, a full Ka-band transition from half height rectangular waveguide to microstrip transmission line is designed and optimized. A stepped impedance microstrip probe is adopted to realize good impedance matching. By using ANSYS HFSS simulation and optimization, the designed transition has insert loss <; 0.25dB and return loss > 15dB during full Ka band. In the frequency band of 26.5 to 37GHz, insert loss is maintained below 0.15dB and return loss is maintained upon 20dB. This half height rectangular waveguide to microstrip transition not only has high performance but also has the advantage of much smaller size than conventional one, which may have potential applications in compact Ka-band integrated circuits and systems.
{"title":"A full Ka-band half height waveguide to microstrip transition","authors":"Yifan Xiao, L. Ye, G. Cai, Q. Liu","doi":"10.1109/APMC.2015.7411580","DOIUrl":"https://doi.org/10.1109/APMC.2015.7411580","url":null,"abstract":"In this paper, a full Ka-band transition from half height rectangular waveguide to microstrip transmission line is designed and optimized. A stepped impedance microstrip probe is adopted to realize good impedance matching. By using ANSYS HFSS simulation and optimization, the designed transition has insert loss <; 0.25dB and return loss > 15dB during full Ka band. In the frequency band of 26.5 to 37GHz, insert loss is maintained below 0.15dB and return loss is maintained upon 20dB. This half height rectangular waveguide to microstrip transition not only has high performance but also has the advantage of much smaller size than conventional one, which may have potential applications in compact Ka-band integrated circuits and systems.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132649276","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413105
Dong Huang, Hong-li Peng, Xing Li, Weiqing Jin, Junfa Mao
In this paper, a near-field spherical layered human head (SLH) model is introduced for stroke detections. The model excited by a half-wave E-dipole is explained at length with its detailed modeling procedures stated. Simulated parameters which are obtained between SLH and hand phantom, such as stroke scattering features (SSF) and antenna S-parameters, are compared. It is found that these parameters can be correctly modeled by SLH except its SSF within head.
{"title":"A near-field spherical layered human head model for stroke detections","authors":"Dong Huang, Hong-li Peng, Xing Li, Weiqing Jin, Junfa Mao","doi":"10.1109/APMC.2015.7413105","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413105","url":null,"abstract":"In this paper, a near-field spherical layered human head (SLH) model is introduced for stroke detections. The model excited by a half-wave E-dipole is explained at length with its detailed modeling procedures stated. Simulated parameters which are obtained between SLH and hand phantom, such as stroke scattering features (SSF) and antenna S-parameters, are compared. It is found that these parameters can be correctly modeled by SLH except its SSF within head.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132725297","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413087
Zetao Wu, Xiongying Liu, Yi Fan, Y. Di
A novel single fed compact circularly polarized implantable antenna is presented for biomedical applications at industrial, scientific and medical band (ISM band: 2.40-2.48 GHz). By utilizing a complementary split-ring resonator (CSRR) loading on the radiator, the proposed antenna not only achieves miniaturization, but also realizes circular polarization. The total size of the proposed antenna, including substrate and superstrate, is 8.5 × 8.5 × 1.27 mm3. In order to evaluate the performance, the proposed antenna is simulated in a homogeneous cubic skin tissue phantom. The bandwidths of simulated impedance and axial ratio (AR) are 11.8% (2.30-2.59 GHz) with S11 <; -10 dB and 2.5% (2.41-2.47 GHz) with AR <; 3dB, respectively. The simulated peak gain is -22.1 dBi. In addition, the effect of the different embedded depth is discussed and examined.
{"title":"A compact CSRR loaded circularly polarized implantable antenna for biomedical applications","authors":"Zetao Wu, Xiongying Liu, Yi Fan, Y. Di","doi":"10.1109/APMC.2015.7413087","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413087","url":null,"abstract":"A novel single fed compact circularly polarized implantable antenna is presented for biomedical applications at industrial, scientific and medical band (ISM band: 2.40-2.48 GHz). By utilizing a complementary split-ring resonator (CSRR) loading on the radiator, the proposed antenna not only achieves miniaturization, but also realizes circular polarization. The total size of the proposed antenna, including substrate and superstrate, is 8.5 × 8.5 × 1.27 mm3. In order to evaluate the performance, the proposed antenna is simulated in a homogeneous cubic skin tissue phantom. The bandwidths of simulated impedance and axial ratio (AR) are 11.8% (2.30-2.59 GHz) with S11 <; -10 dB and 2.5% (2.41-2.47 GHz) with AR <; 3dB, respectively. The simulated peak gain is -22.1 dBi. In addition, the effect of the different embedded depth is discussed and examined.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132741352","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 : 2015-12-01DOI: 10.1109/APMC.2015.7413483
Xiao Xu, Xin Yang, T. Yoshimasu
A novel 2.4 GHz-band 0.5-V Class-C PMOS VCO IC with an amplitude feedback loop is proposed. The amplitude feedback loop circuit consists of a detector, an invertor and a bias control circuit. The feedback loop automatically changes the bias of LC-VCO and shifts the oscillation mode from initial Class-AB to Class-C in steady-state. The Class-C VCO IC is designed, fabricated and fully evaluated in 180-nm CMOS technology. The fabricated VCO IC has exhibited a measured phase noise of -117.4 dBc/Hz at 1 MHz offset from the 2.25 GHz carrier frequency with a supply voltage of only 0.5-V.
{"title":"2.4-GHz band low-voltage class-C PMOS VCO IC with amplitude feedback loop","authors":"Xiao Xu, Xin Yang, T. Yoshimasu","doi":"10.1109/APMC.2015.7413483","DOIUrl":"https://doi.org/10.1109/APMC.2015.7413483","url":null,"abstract":"A novel 2.4 GHz-band 0.5-V Class-C PMOS VCO IC with an amplitude feedback loop is proposed. The amplitude feedback loop circuit consists of a detector, an invertor and a bias control circuit. The feedback loop automatically changes the bias of LC-VCO and shifts the oscillation mode from initial Class-AB to Class-C in steady-state. The Class-C VCO IC is designed, fabricated and fully evaluated in 180-nm CMOS technology. The fabricated VCO IC has exhibited a measured phase noise of -117.4 dBc/Hz at 1 MHz offset from the 2.25 GHz carrier frequency with a supply voltage of only 0.5-V.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127838694","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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