Pub Date : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8803966
W. Lai, S. Jang, You-Liang Ciou
This letter proposes a new LC injection-locked frequency divider (ILFD). The ILFD consists of three capacitive cross-coupled sub-ILFDs operating at 1.85, 4.73 and 5.74 GHz respectively. The two sub-ILFDs are coupled by a pair of MIM capacitors. The proposed ILFD has been implemented with the TSMC 0.18 μm BiCMOS technology. The die area is 1.2×1.196 mm2. By controlling the gate voltages of the switching transistors, the ILFD has at least three different operational modes, high-band dominant mode, low-band dominant mode and middle-band dominant oscillation mode. The ILFD can operate at low power of 1.592 mW. At gate bias 0.55V, an external injected signal power Pinj of 0 dBm provides a low-band locking range from 1.9 to 5.8 GHz (101.29%) and the maximum figure of merit (FOM) is 63.63.
{"title":"Triple Capacitive Cross-Coupled Divide-by-2 Injection-Locked Frequency Divider","authors":"W. Lai, S. Jang, You-Liang Ciou","doi":"10.1109/IEEE-IWS.2019.8803966","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803966","url":null,"abstract":"This letter proposes a new LC injection-locked frequency divider (ILFD). The ILFD consists of three capacitive cross-coupled sub-ILFDs operating at 1.85, 4.73 and 5.74 GHz respectively. The two sub-ILFDs are coupled by a pair of MIM capacitors. The proposed ILFD has been implemented with the TSMC 0.18 μm BiCMOS technology. The die area is 1.2×1.196 mm2. By controlling the gate voltages of the switching transistors, the ILFD has at least three different operational modes, high-band dominant mode, low-band dominant mode and middle-band dominant oscillation mode. The ILFD can operate at low power of 1.592 mW. At gate bias 0.55V, an external injected signal power Pinj of 0 dBm provides a low-band locking range from 1.9 to 5.8 GHz (101.29%) and the maximum figure of merit (FOM) is 63.63.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134591505","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 : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8803998
Weijie Xu, Chun Yang, Ziye Wang, Weiqian Zhao
A Frequency-Tripling optoelectronic oscillator (FT-OEO) based on frequency multiplication in saturated low phase noise amplifier (LPNA) has been proposed and demonstrated. In the FT-OEO, the LPNA works in the saturated region and generates significant harmonic signals. The harmonic signals are coupled out from the loop and filtered as the output of the FT-OEO. A prototype of the FT-OEO, which oscillated at 2GHz, was constructed and the frequency-tripling signal at 6GHz was generated as the desired output. Comparison of the measured phase noise power spectrum density (PSD) of the fundamental signal with the frequency-tripling signal indicated that the additive phase noise of the amplifier is insignificant. Utilizing the saturated LPNA driven by the in-loop high-power oscillating signal, this FT-OEO provides a simple and cost-efficient scheme for frequency tripling.
{"title":"Frequency-Tripling OEO based on Frequency Multiplication in Saturated Low Phase Noise Amplifier","authors":"Weijie Xu, Chun Yang, Ziye Wang, Weiqian Zhao","doi":"10.1109/IEEE-IWS.2019.8803998","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803998","url":null,"abstract":"A Frequency-Tripling optoelectronic oscillator (FT-OEO) based on frequency multiplication in saturated low phase noise amplifier (LPNA) has been proposed and demonstrated. In the FT-OEO, the LPNA works in the saturated region and generates significant harmonic signals. The harmonic signals are coupled out from the loop and filtered as the output of the FT-OEO. A prototype of the FT-OEO, which oscillated at 2GHz, was constructed and the frequency-tripling signal at 6GHz was generated as the desired output. Comparison of the measured phase noise power spectrum density (PSD) of the fundamental signal with the frequency-tripling signal indicated that the additive phase noise of the amplifier is insignificant. Utilizing the saturated LPNA driven by the in-loop high-power oscillating signal, this FT-OEO provides a simple and cost-efficient scheme for frequency tripling.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130551556","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 : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8804140
Hongyu Zhang, Yubin Zhao, Junjian Huang, Jiawei Zhang, Yuefeng Ji
In the underwater scenario, the multiple inputs and single output (MISO) technology can greatly enhance the wireless power transfer (WPT) range. In this paper, we investigate the wireless power propagation model for MISO based underwater WPT (UWPT). Experiments are conducted to record the transmission characteristics of the system, using the voltage and phase to model the coupling state of the system. We measure the voltage and phase at different positions in a plane 55mm away from the transmitters, and the experimental results demonstrate that the system has a good transmission performance in most areas of the measurement range. Compared to the experiment with the same setups in the air, the UWPT system can transmit more power and longer distance.
{"title":"Propagation Modeling for Underwater Magnetic MISO Wireless Power Transfer","authors":"Hongyu Zhang, Yubin Zhao, Junjian Huang, Jiawei Zhang, Yuefeng Ji","doi":"10.1109/IEEE-IWS.2019.8804140","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804140","url":null,"abstract":"In the underwater scenario, the multiple inputs and single output (MISO) technology can greatly enhance the wireless power transfer (WPT) range. In this paper, we investigate the wireless power propagation model for MISO based underwater WPT (UWPT). Experiments are conducted to record the transmission characteristics of the system, using the voltage and phase to model the coupling state of the system. We measure the voltage and phase at different positions in a plane 55mm away from the transmitters, and the experimental results demonstrate that the system has a good transmission performance in most areas of the measurement range. Compared to the experiment with the same setups in the air, the UWPT system can transmit more power and longer distance.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132097803","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 : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8804020
Sohyeon Jung, Moogoong Choo, Jae-Yeong Lee, In-sung Ahn, Kangseop Lee, W. Hong
A method to extract dielectric property of inhomogeneous PSV (Passivation)-coated Si-wafer is presented at broadband frequencies from 75 GHz to 325 GHz. Free-space measurement using continuous wave (CW) system is carried out. Numerical iterative algorithm is employed to extract permittivity from complex scattering parameters. Due to scarcity of related previous studies beyond 100 GHz, the discussions on parameters that may affect the results are also described in detail. The calculated permittivity based on the proposed method highly correlates with the analytical values.
{"title":"Free-Space Permittivity Measurement for Inhomogeneous PSV-Coated Si-wafer at Frequencies from 75 GHz to 325 GHz","authors":"Sohyeon Jung, Moogoong Choo, Jae-Yeong Lee, In-sung Ahn, Kangseop Lee, W. Hong","doi":"10.1109/IEEE-IWS.2019.8804020","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804020","url":null,"abstract":"A method to extract dielectric property of inhomogeneous PSV (Passivation)-coated Si-wafer is presented at broadband frequencies from 75 GHz to 325 GHz. Free-space measurement using continuous wave (CW) system is carried out. Numerical iterative algorithm is employed to extract permittivity from complex scattering parameters. Due to scarcity of related previous studies beyond 100 GHz, the discussions on parameters that may affect the results are also described in detail. The calculated permittivity based on the proposed method highly correlates with the analytical values.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"0430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125362327","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}
In this paper, a transmissive-type metalens is proposed to realize independent manipulation of orthogonal circularly polarized wave in microwave region. Based on the combination of propagation phase and geometry phase principles, the opposite circularly polarized transmitted wave can be deflected into independent and arbitrary directions. Experimental measurement are conducted and effectively verified the feasibility of the proposed theory for artificial manipulation of circular polari-zation manipulation in microwave region.
{"title":"Microwave Meta-lens for Generating Polarization-Independent refracted waves","authors":"Kuang Zhang, Yueyi Yuan, Yuxiang Wang, Xumin Ding, Qun Wu","doi":"10.1109/IEEE-IWS.2019.8803917","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803917","url":null,"abstract":"In this paper, a transmissive-type metalens is proposed to realize independent manipulation of orthogonal circularly polarized wave in microwave region. Based on the combination of propagation phase and geometry phase principles, the opposite circularly polarized transmitted wave can be deflected into independent and arbitrary directions. Experimental measurement are conducted and effectively verified the feasibility of the proposed theory for artificial manipulation of circular polari-zation manipulation in microwave region.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125570770","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 : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8804108
Yingqi Zhang, Wanchen Yang, W. Che, Q. Xue, Lu Chen
This paper presents a novel wideband filtering patch antenna with multiple radiation nulls for good stopband suppression. A series of filtering structures are integrated within the antenna configuration without adding any extra circuits. Firstly, a U-shaped strip is connected with the feeding probe of the patch antenna to generate an upper-band-edge null. Meanwhile, a pair of square rings coupled to the U-strip are introduced to insert another null to perform the upper stopband. Similarly, the lower stopband is also suppressed by two nulls, which are inserted by two split-ring-slots on the patch and on the ground plane respectively. As results, a good filtering patch antenna is readily constructed, then a wide working band of 19.2% and a high out-of-band suppression level over 20dB are achieved. In addition, the filtering antenna is additionally adapted to be differentially fed to improve the cross-polarization of the H-plane radiation pattern. Besides filtering functions, above filtering structures also broadens the impedance bandwidth and increases the broadside gain from 8.2 to 9.23dBi compared to the original patch antenna.
{"title":"A Wideband Filtering Patch Antenna with Multiple Radiation Nulls For Good Stopband Suppression","authors":"Yingqi Zhang, Wanchen Yang, W. Che, Q. Xue, Lu Chen","doi":"10.1109/IEEE-IWS.2019.8804108","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804108","url":null,"abstract":"This paper presents a novel wideband filtering patch antenna with multiple radiation nulls for good stopband suppression. A series of filtering structures are integrated within the antenna configuration without adding any extra circuits. Firstly, a U-shaped strip is connected with the feeding probe of the patch antenna to generate an upper-band-edge null. Meanwhile, a pair of square rings coupled to the U-strip are introduced to insert another null to perform the upper stopband. Similarly, the lower stopband is also suppressed by two nulls, which are inserted by two split-ring-slots on the patch and on the ground plane respectively. As results, a good filtering patch antenna is readily constructed, then a wide working band of 19.2% and a high out-of-band suppression level over 20dB are achieved. In addition, the filtering antenna is additionally adapted to be differentially fed to improve the cross-polarization of the H-plane radiation pattern. Besides filtering functions, above filtering structures also broadens the impedance bandwidth and increases the broadside gain from 8.2 to 9.23dBi compared to the original patch antenna.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125053291","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 : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8803986
Jianxin Jing, Han Shao, P. Yan, Z. Jiang, Chao Yu
This paper proposes a novel digital predistortion (DPD) technique to linearize a millimeter-wave multi-beam transmitters with digital beam-forming network. It is achieved by modeling outputs of power amplifiers (PAs) and linearizing them with decomposed vector rotation-based model, respectively. The measurement results have shown that the proposed method can effectively realize the linearization of target beams, providing a promising solution for multi-user applications in 5G massive multiple-input multiple-output (mMIMO) wireless systems.
{"title":"Digital Predistortion of Millimeter-Wave Multi-beam Transmitters with Digital Beam-forming Network","authors":"Jianxin Jing, Han Shao, P. Yan, Z. Jiang, Chao Yu","doi":"10.1109/IEEE-IWS.2019.8803986","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803986","url":null,"abstract":"This paper proposes a novel digital predistortion (DPD) technique to linearize a millimeter-wave multi-beam transmitters with digital beam-forming network. It is achieved by modeling outputs of power amplifiers (PAs) and linearizing them with decomposed vector rotation-based model, respectively. The measurement results have shown that the proposed method can effectively realize the linearization of target beams, providing a promising solution for multi-user applications in 5G massive multiple-input multiple-output (mMIMO) wireless systems.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126165032","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 : 2019-05-19DOI: 10.1109/IEEE-IWS.2019.8804082
Y. Huang, Yuliang Zhou, Haiyan Jin, Guoan Wang, M. Bozzi
A miniaturized evanescent mode substrate integrated waveguide (SIW) bandpass filter loaded with mixed-coupled folded complementary split-ring resonators (FCSRRs) is reported in this work. Compared with the conventional CSRR, the proposed FCSRR is with enhanced product of equivalent inductance and capacitance, which is beneficial for size reduction of the conventional CSRR. Hence, as the FCSS pair are loaded into SIW, the newly-formed resonator will exhibit evanescent mode resonance characteristic as well, and even achieve smaller physical size as compared its corresponding conventional CSRR-based counterpart. Meanwhile, it has been well-known that, in the SIW section with a pair of face-to-face FCSRRs, a transmission zero (TZ) at the upper stopband can be generated by the mixed coupling between the SIW and FCSRRs. Furthermore, by adding a slot between the splits of the two FCSRRs, a dual-mode resonator is developed, in which the cross-coupling scheme is constituted to produce an extra TZ at the lower stopband of the resonator to improve its selectivity performance notably. To demonstrate the aforementioned idea, a size-miniaturized bandpass filter based on the proposed SIW section with mixed-coupled FCSRRs is realized. Experimental results show that both miniature physical size and good performance are achieved simultaneously, which illustrates that the proposed work is promising in practical radio frequency (RF) and microwave applications.
{"title":"Miniaturized Evanescent Mode Substrate Integrated Waveguide Filter with Mixed-Coupled Folded Complementary Split-Ring Resonators","authors":"Y. Huang, Yuliang Zhou, Haiyan Jin, Guoan Wang, M. Bozzi","doi":"10.1109/IEEE-IWS.2019.8804082","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804082","url":null,"abstract":"A miniaturized evanescent mode substrate integrated waveguide (SIW) bandpass filter loaded with mixed-coupled folded complementary split-ring resonators (FCSRRs) is reported in this work. Compared with the conventional CSRR, the proposed FCSRR is with enhanced product of equivalent inductance and capacitance, which is beneficial for size reduction of the conventional CSRR. Hence, as the FCSS pair are loaded into SIW, the newly-formed resonator will exhibit evanescent mode resonance characteristic as well, and even achieve smaller physical size as compared its corresponding conventional CSRR-based counterpart. Meanwhile, it has been well-known that, in the SIW section with a pair of face-to-face FCSRRs, a transmission zero (TZ) at the upper stopband can be generated by the mixed coupling between the SIW and FCSRRs. Furthermore, by adding a slot between the splits of the two FCSRRs, a dual-mode resonator is developed, in which the cross-coupling scheme is constituted to produce an extra TZ at the lower stopband of the resonator to improve its selectivity performance notably. To demonstrate the aforementioned idea, a size-miniaturized bandpass filter based on the proposed SIW section with mixed-coupled FCSRRs is realized. Experimental results show that both miniature physical size and good performance are achieved simultaneously, which illustrates that the proposed work is promising in practical radio frequency (RF) and microwave applications.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121826234","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8803980
Yanyun Chen, Jin Shi
In this paper, a planar differential dual-patch antenna is proposed to achieve filtering response by radiation nulls from two pairs of slots on each patch. The radiation nulls can be controlled by the length of the slots because the resonant slots suppress the polarization component of electric field. The bandwidth can be controlled by the positions of the radiation nulls. An example of the proposed antenna is designed and simulated, which exhibits the 10-dB bandwidth of 10.64%, the maximum gain of 6.6 dBi and the cross-polarization level of 43.9 dB.
{"title":"A Planar Differential Filtering Dual-Patch Antenna with Slots for 5G Millimeter-Wave","authors":"Yanyun Chen, Jin Shi","doi":"10.1109/IEEE-IWS.2019.8803980","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8803980","url":null,"abstract":"In this paper, a planar differential dual-patch antenna is proposed to achieve filtering response by radiation nulls from two pairs of slots on each patch. The radiation nulls can be controlled by the length of the slots because the resonant slots suppress the polarization component of electric field. The bandwidth can be controlled by the positions of the radiation nulls. An example of the proposed antenna is designed and simulated, which exhibits the 10-dB bandwidth of 10.64%, the maximum gain of 6.6 dBi and the cross-polarization level of 43.9 dB.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115166868","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 : 2019-05-01DOI: 10.1109/IEEE-IWS.2019.8804105
Jun-Jie Peng, S. Qu
Indium tin oxide (ITO) material is a practicable alternative to metal utilized in transparent antennas. However, the conductor loss of ITO material is the major obstacle to antenna design. In this work, a transparent ITO reflectarray based on glass substrate with ITO film operating at 28GHz is proposed. A single layer sub-wavelength element with 0.31 wavelength spacing is proposed in this reflectarray design. The peak loss of the proposed element is lower than 4dB while achieving a phase variation of 288° at 28GHz. A 30×30 elements reflectarray with a focus to diameter ratio (f/D) of 1 is designed and simulated for demonstration. It achieves more than 84% optical transparency and 75% radiation efficiency at the center frequency.
{"title":"Single Layer Optically Transparent Reflectarray Based on Indium Tin Oxide","authors":"Jun-Jie Peng, S. Qu","doi":"10.1109/IEEE-IWS.2019.8804105","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2019.8804105","url":null,"abstract":"Indium tin oxide (ITO) material is a practicable alternative to metal utilized in transparent antennas. However, the conductor loss of ITO material is the major obstacle to antenna design. In this work, a transparent ITO reflectarray based on glass substrate with ITO film operating at 28GHz is proposed. A single layer sub-wavelength element with 0.31 wavelength spacing is proposed in this reflectarray design. The peak loss of the proposed element is lower than 4dB while achieving a phase variation of 288° at 28GHz. A 30×30 elements reflectarray with a focus to diameter ratio (f/D) of 1 is designed and simulated for demonstration. It achieves more than 84% optical transparency and 75% radiation efficiency at the center frequency.","PeriodicalId":306297,"journal":{"name":"2019 IEEE MTT-S International Wireless Symposium (IWS)","volume":"382 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115299080","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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