Pub Date : 2022-10-03DOI: 10.1080/02726343.2022.2154466
Sonal Gupta, S. Patil, C. Dalela, B. Kanaujia
ABSTRACT In this article, an antenna structure consisting fractal defected ground monopole antenna for circularly polarized radiation is presented. The characteristics of circular polarization in the proposed structure are obtained by fractal defected ground structure. The third iterative h-shaped fractal slot antenna is fabricated and examined on Rogers RT/duroid 5880 substrate for validating the simulated results. The best circular polarization radiation is obtained by varying the key parameters of the proposed geometry. The simulated and measured results confirmed that the proposed antenna can be adequately produced an impedance bandwidth (2.15 GHz – 3.55 GHz) of 49.12% with 3 dB axial ratio bandwidth (2.54 GHz – 3.03 GHz) of 17.59%, while the measured peak gain of the proposed structure is 2.99 dBic. The proposed work is suitable for Bluetooth/LTE/CNSS/S-band and CA-band applications.
{"title":"Circularly polarized fractal defected ground monopole antenna for Bluetooth/LTE/CNSS/S-band and CA- band applications","authors":"Sonal Gupta, S. Patil, C. Dalela, B. Kanaujia","doi":"10.1080/02726343.2022.2154466","DOIUrl":"https://doi.org/10.1080/02726343.2022.2154466","url":null,"abstract":"ABSTRACT In this article, an antenna structure consisting fractal defected ground monopole antenna for circularly polarized radiation is presented. The characteristics of circular polarization in the proposed structure are obtained by fractal defected ground structure. The third iterative h-shaped fractal slot antenna is fabricated and examined on Rogers RT/duroid 5880 substrate for validating the simulated results. The best circular polarization radiation is obtained by varying the key parameters of the proposed geometry. The simulated and measured results confirmed that the proposed antenna can be adequately produced an impedance bandwidth (2.15 GHz – 3.55 GHz) of 49.12% with 3 dB axial ratio bandwidth (2.54 GHz – 3.03 GHz) of 17.59%, while the measured peak gain of the proposed structure is 2.99 dBic. The proposed work is suitable for Bluetooth/LTE/CNSS/S-band and CA-band applications.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"485 - 497"},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42965263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-03DOI: 10.1080/02726343.2022.2154945
Xueyuan Guan, Xiangjun Zhang, Q. Bian, Yushun Liu
ABSTRACT A novel substrate-integrated low-temperature ceramic co-fired (LTCC) millimeter-wave bandpass filter operating in the Ka-band is proposed. The filter is composed of multiple layers of media and metal plane. The dielectric resonators (DRs) with high dielectric constant are embedded in LTCC dielectric cavity excavated in LTCC dielectric. The input/output (I/O) is exploited by the slot on metal plane feed by CPW （Co-Planar Waveguide）structure on the top and bottom metal planes, which make the filter able to be integrated to the other components. Simulations and measurements show that the filter has a center frequency of 35 GHz, a relative bandwidth of about 6%, an insertion loss of 1.25 dB, and a return loss of −15 dB in the passband. The filter has many advantages, such as high selectivity, wide bandwidth, low profile, small volume, and so on, which has high engineering application in 5G communications.
{"title":"Compact LTCC millimeter wave bandpass filter with imbedded dielectric resonators","authors":"Xueyuan Guan, Xiangjun Zhang, Q. Bian, Yushun Liu","doi":"10.1080/02726343.2022.2154945","DOIUrl":"https://doi.org/10.1080/02726343.2022.2154945","url":null,"abstract":"ABSTRACT A novel substrate-integrated low-temperature ceramic co-fired (LTCC) millimeter-wave bandpass filter operating in the Ka-band is proposed. The filter is composed of multiple layers of media and metal plane. The dielectric resonators (DRs) with high dielectric constant are embedded in LTCC dielectric cavity excavated in LTCC dielectric. The input/output (I/O) is exploited by the slot on metal plane feed by CPW （Co-Planar Waveguide）structure on the top and bottom metal planes, which make the filter able to be integrated to the other components. Simulations and measurements show that the filter has a center frequency of 35 GHz, a relative bandwidth of about 6%, an insertion loss of 1.25 dB, and a return loss of −15 dB in the passband. The filter has many advantages, such as high selectivity, wide bandwidth, low profile, small volume, and so on, which has high engineering application in 5G communications.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"522 - 528"},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47814748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-03DOI: 10.1080/02726343.2022.2154467
Lanlan Jiang, Weihua Luo, Zihao Wang, Yi Ren
ABSTRACT A millimeter wave dielectric resonator antenna (DRA) array with high-gain and high-selectivity filtering response is proposed, which is composed of stacked feeding network and stacked DRA. The stacked feeding network consisting of two layers of thin substrate has the efficient characteristics to expand and integrate. The band-pass filter formed by complementary split ring resonator (CSRR) structure generates radiation nulls at the edge of the high-frequency band. With the improved filtering stubs loaded at the end of the H-shaped microstrip power divider, a radiation null at the edge of the low-frequency band is obtained and the roll-off degree at the edge of the high-frequency band is improved. By embedding the metal column in the fork-shaped stub, the suppression level of the low-frequency stopband is improved. A prototype of the proposed DRA array is fabricated and measured, which shows 7.2% relative bandwidth and a stable directional pattern in the range of 26.28–28.25 GHz with an average gain of 9.57 dBi. And an out-of-band suppression level of 18 dB is achieved. The DRA array can be applied for 5 G millimeter wave band to support high-speed communications at short distance.
{"title":"A high-gain filtering DRA array for millimeter wave communication","authors":"Lanlan Jiang, Weihua Luo, Zihao Wang, Yi Ren","doi":"10.1080/02726343.2022.2154467","DOIUrl":"https://doi.org/10.1080/02726343.2022.2154467","url":null,"abstract":"ABSTRACT A millimeter wave dielectric resonator antenna (DRA) array with high-gain and high-selectivity filtering response is proposed, which is composed of stacked feeding network and stacked DRA. The stacked feeding network consisting of two layers of thin substrate has the efficient characteristics to expand and integrate. The band-pass filter formed by complementary split ring resonator (CSRR) structure generates radiation nulls at the edge of the high-frequency band. With the improved filtering stubs loaded at the end of the H-shaped microstrip power divider, a radiation null at the edge of the low-frequency band is obtained and the roll-off degree at the edge of the high-frequency band is improved. By embedding the metal column in the fork-shaped stub, the suppression level of the low-frequency stopband is improved. A prototype of the proposed DRA array is fabricated and measured, which shows 7.2% relative bandwidth and a stable directional pattern in the range of 26.28–28.25 GHz with an average gain of 9.57 dBi. And an out-of-band suppression level of 18 dB is achieved. The DRA array can be applied for 5 G millimeter wave band to support high-speed communications at short distance.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"498 - 512"},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49018996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-18DOI: 10.1080/02726343.2022.2140915
Zhiyuan Yang, Jie Zhang, Yufeng Liu, Wenmei Zhang, Qiang Zhang, Yang Gao, Zongwei Tong
ABSTRACT A novel wideband reflectarray antenna based on a sub-wavelength Archimedes spiral unit cell is proposed in this paper. The size of the unit cell is fixed to ( -the free space wavelength at 5.8 GHz), and the reflection phase variation can be obtained by changing the inward extension length of the arms. After the element simulation analysis, a smooth and almost linear reflection phase curve is achieved. The phase range can reach more than 500°, which is enough to meet the phase shift requirement of the reflectarray. Based on the proposed unit cell, a 10 × 10-element reflectarray with the size of 220 mm×220 mm is designed, fabricated, and measured. The measured result agrees well with the simulations, which show relatively wide 1- and 3-dB gain bandwidths of 20.7% (5.57–6.77 GHz) and 31.4% (5.31–7.13 GHz), respectively. The measured gain at its working frequency of 5.8 GHz is 18.9 dBi with an aperture efficiency of 34.2%. Furthermore, the cross-polarization levels of the proposed antenna are less than −25 dB, which attributes to all the elements that are arranged mirror symmetrically.
{"title":"A novel wideband reflectarray using sub-wavelength Archimedes spiral unit cell","authors":"Zhiyuan Yang, Jie Zhang, Yufeng Liu, Wenmei Zhang, Qiang Zhang, Yang Gao, Zongwei Tong","doi":"10.1080/02726343.2022.2140915","DOIUrl":"https://doi.org/10.1080/02726343.2022.2140915","url":null,"abstract":"ABSTRACT A novel wideband reflectarray antenna based on a sub-wavelength Archimedes spiral unit cell is proposed in this paper. The size of the unit cell is fixed to ( -the free space wavelength at 5.8 GHz), and the reflection phase variation can be obtained by changing the inward extension length of the arms. After the element simulation analysis, a smooth and almost linear reflection phase curve is achieved. The phase range can reach more than 500°, which is enough to meet the phase shift requirement of the reflectarray. Based on the proposed unit cell, a 10 × 10-element reflectarray with the size of 220 mm×220 mm is designed, fabricated, and measured. The measured result agrees well with the simulations, which show relatively wide 1- and 3-dB gain bandwidths of 20.7% (5.57–6.77 GHz) and 31.4% (5.31–7.13 GHz), respectively. The measured gain at its working frequency of 5.8 GHz is 18.9 dBi with an aperture efficiency of 34.2%. Furthermore, the cross-polarization levels of the proposed antenna are less than −25 dB, which attributes to all the elements that are arranged mirror symmetrically.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"411 - 424"},"PeriodicalIF":0.8,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49630260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-18DOI: 10.1080/02726343.2022.2147666
K. Parvez, S. M. Haque
ABSTRACT The paper addresses the design of microstrip fed slot antenna with bandwidth enhancement and minimization of cross-polarization in planar printed configuration. The reference radiating slot antenna resonates at 2.86 GHz having 5.95% – 10 dB bandwidth. Next, the reference slot antenna is loaded with two rectangular loops and four rectangular loops resulting 13.22% and 33.03% −10 dB bandwidth respectively but with poor cross-polarization. To overcome the problem of poor cross-polarization, we have introduced the split ring in one of our antenna design and metallic rings on the bottom of the substrate in another antenna design. These two designs introduce the oppositely directed phi-component of electric field along the radiating slot which cancels out phi-component of electric field, the root cause of increased cross-polarization.
{"title":"Cross-Polarization reduction of wideband slot antennas in planar printed configuration","authors":"K. Parvez, S. M. Haque","doi":"10.1080/02726343.2022.2147666","DOIUrl":"https://doi.org/10.1080/02726343.2022.2147666","url":null,"abstract":"ABSTRACT The paper addresses the design of microstrip fed slot antenna with bandwidth enhancement and minimization of cross-polarization in planar printed configuration. The reference radiating slot antenna resonates at 2.86 GHz having 5.95% – 10 dB bandwidth. Next, the reference slot antenna is loaded with two rectangular loops and four rectangular loops resulting 13.22% and 33.03% −10 dB bandwidth respectively but with poor cross-polarization. To overcome the problem of poor cross-polarization, we have introduced the split ring in one of our antenna design and metallic rings on the bottom of the substrate in another antenna design. These two designs introduce the oppositely directed phi-component of electric field along the radiating slot which cancels out phi-component of electric field, the root cause of increased cross-polarization.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"401 - 410"},"PeriodicalIF":0.8,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42080285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-18DOI: 10.1080/02726343.2022.2147667
Min Wang, Yuxin Mo, Xuan Li, Nan Hu, Wenqing Xie, Zhengchuan Chen
ABSTRACT A hybrid phase error analysis for dual-polarized reflectarray antenna using asymmetric split patch element is proposed in this article. The asymmetric split patch consists of a four-leaf patch and two split rings of different size where small one makes the patch asymmeric along y-axis and large one is used for impedance matching. And a complete 360° phase shift is obtained by using variable-size approach and flipping split patch 180° along y-axis. Then, we use hybrid phase error analysis approach to analyze and optimize the influence of phase sensitivity, quasi-periodic influence and phase constant on the reflectarray antenna. The simulated results show that maximum of element phase sensitivity is reduced by 275°/mm and element quasi-periodic phase error is dropped by 38°. Furthermore, dual-polarized reflectarray composed of 676 asymmetric split patch elements is designed, fabricated and measured. The measured gain of the proposed antenna is 29.9 dBi @10.0 GHz with aperture efficiency of 46%. The −1 dB gain bandwidth is 12% @10.0 GHz. The measured results show that the proposed antenna can improve phase accuracy effectively by using hybrid phase error analysis approach with asymmetric split patch.
{"title":"Hybrid phase error analysis for dual-polarized reflectarray antenna using asymmetric split patch element","authors":"Min Wang, Yuxin Mo, Xuan Li, Nan Hu, Wenqing Xie, Zhengchuan Chen","doi":"10.1080/02726343.2022.2147667","DOIUrl":"https://doi.org/10.1080/02726343.2022.2147667","url":null,"abstract":"ABSTRACT A hybrid phase error analysis for dual-polarized reflectarray antenna using asymmetric split patch element is proposed in this article. The asymmetric split patch consists of a four-leaf patch and two split rings of different size where small one makes the patch asymmeric along y-axis and large one is used for impedance matching. And a complete 360° phase shift is obtained by using variable-size approach and flipping split patch 180° along y-axis. Then, we use hybrid phase error analysis approach to analyze and optimize the influence of phase sensitivity, quasi-periodic influence and phase constant on the reflectarray antenna. The simulated results show that maximum of element phase sensitivity is reduced by 275°/mm and element quasi-periodic phase error is dropped by 38°. Furthermore, dual-polarized reflectarray composed of 676 asymmetric split patch elements is designed, fabricated and measured. The measured gain of the proposed antenna is 29.9 dBi @10.0 GHz with aperture efficiency of 46%. The −1 dB gain bandwidth is 12% @10.0 GHz. The measured results show that the proposed antenna can improve phase accuracy effectively by using hybrid phase error analysis approach with asymmetric split patch.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"436 - 447"},"PeriodicalIF":0.8,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48720181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-18DOI: 10.1080/02726343.2022.2140922
Weihua Luo, Yulu Feng, Yi Ren, Min Wang
ABSTRACT For integrated design of a filter and an antenna, a wideband circularly polarized (CP) dielectric resonator antenna (DRA) with filtering characteristics is proposed. A rectangular slot structure is etched on the ground to optimize the axial ratio (AR) bandwidth of the antenna singly fed by one port. Capacitive filtering branches are combined into the microstrip feeding line to effectively generate two radiation nulls outside the passband. To further enhance the suppression level in the high-frequency stopband, the stair-shaped DR is chamfered into a fish-shaped structure. A suppression level larger than 15 dB is found within the stopband. A prototype of the antenna is fabricated, and both of the simulated and measured results show a wide bandpass filtering performance over the operating frequency band. The antenna has an impedance bandwidth of 37.8%, an AR bandwidth of 25.1%, and a low profile of 0.078λ 0 (λ 0 is the free-space wavelength at 5.47 GHz), which can be a good candidate for 5 G and WLAN communication systems.
{"title":"A Wideband Single-fed circularly polarized dielectric resonator antenna with bandpass filtering response","authors":"Weihua Luo, Yulu Feng, Yi Ren, Min Wang","doi":"10.1080/02726343.2022.2140922","DOIUrl":"https://doi.org/10.1080/02726343.2022.2140922","url":null,"abstract":"ABSTRACT For integrated design of a filter and an antenna, a wideband circularly polarized (CP) dielectric resonator antenna (DRA) with filtering characteristics is proposed. A rectangular slot structure is etched on the ground to optimize the axial ratio (AR) bandwidth of the antenna singly fed by one port. Capacitive filtering branches are combined into the microstrip feeding line to effectively generate two radiation nulls outside the passband. To further enhance the suppression level in the high-frequency stopband, the stair-shaped DR is chamfered into a fish-shaped structure. A suppression level larger than 15 dB is found within the stopband. A prototype of the antenna is fabricated, and both of the simulated and measured results show a wide bandpass filtering performance over the operating frequency band. The antenna has an impedance bandwidth of 37.8%, an AR bandwidth of 25.1%, and a low profile of 0.078λ 0 (λ 0 is the free-space wavelength at 5.47 GHz), which can be a good candidate for 5 G and WLAN communication systems.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"425 - 435"},"PeriodicalIF":0.8,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44554438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-18DOI: 10.1080/02726343.2022.2140925
Rahul Tiwari, A. Bagwari, V. Kushwah
ABSTRACT This article demonstrated a compact reconfigurable microstrip antenna with a multi-band configuration. It resonates for three different frequency configurations, including the single and dual bands. The primary rectangular patch antenna resonates for WLAN (5.2 GHz center frequency) band. The reconfigurable electromagnetic bandgap (EBG) and parasitic patches near the feed line produce 4 and 6.33 GHz resonance. The defected ground structure is integrated with a PIN diode to make reconfigurable EBG, and it resonated at C band (4 GHz). The PIN diode switching configuration embedded with EBG and one square patch creates dual-band characteristics in wireless local-area network (WLAN) and International Telecommunication Union (ITU) bands. Other PIN diodes switching configurations with primary antenna and two other patches work for C and WLAN bands. The proposed antenna resonated at 4, 5.2, and 6.33 GHz frequencies with different switching configurations of the PIN diode. The simulated results of this novel antenna configuration verified with measured consequences for antenna parameters like reflection coefficient and radiation characteristics are also presented.
{"title":"Multi-band frequency reconfigurable antenna using EBG and parasitic patches","authors":"Rahul Tiwari, A. Bagwari, V. Kushwah","doi":"10.1080/02726343.2022.2140925","DOIUrl":"https://doi.org/10.1080/02726343.2022.2140925","url":null,"abstract":"ABSTRACT This article demonstrated a compact reconfigurable microstrip antenna with a multi-band configuration. It resonates for three different frequency configurations, including the single and dual bands. The primary rectangular patch antenna resonates for WLAN (5.2 GHz center frequency) band. The reconfigurable electromagnetic bandgap (EBG) and parasitic patches near the feed line produce 4 and 6.33 GHz resonance. The defected ground structure is integrated with a PIN diode to make reconfigurable EBG, and it resonated at C band (4 GHz). The PIN diode switching configuration embedded with EBG and one square patch creates dual-band characteristics in wireless local-area network (WLAN) and International Telecommunication Union (ITU) bands. Other PIN diodes switching configurations with primary antenna and two other patches work for C and WLAN bands. The proposed antenna resonated at 4, 5.2, and 6.33 GHz frequencies with different switching configurations of the PIN diode. The simulated results of this novel antenna configuration verified with measured consequences for antenna parameters like reflection coefficient and radiation characteristics are also presented.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"448 - 461"},"PeriodicalIF":0.8,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45493919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-18DOI: 10.1080/02726343.2022.2144062
B. Lin, Wenzhun Huang, Jianxin Guo, Yan-wen Wang, Hongjun Ye, Xiang Ji
ABSTRACT In this work, a high-efficiency ultra-wideband ellipse-shaped linear-to-circular polarization conversion metasurface is proposed. The metasurface is composed of a square array of ellipse-shaped metal patches printed on grounded dielectric substrate and covered by a dielectric layer, because it is an orthogonal anisotropic structure with a pair of mutually perpendicular symmetric axes u and v along the directions ±45° with respect to the vertical y-axis, and the reflection phase difference under u- and v-polarized incidences is very close to −90° in an ultra-wide frequency ranges, both theoretical prediction and numerical simulation show that the metasurface can achieve high-efficiency ultra-wideband linear-to-circular polarization conversion under x- and y-polarized incidences, its 3-dB axial-ratio (AR) band is between 7.08 and 25.86 GHz with a relative bandwidth of 114%, in particular, the AR of its reflected wave can be kept lower than 0.89 dB in the frequency range 7.65–25.32 GHz, in which the polarization conversion rate (PCR) is always larger than 99.73%. Finally, one effective experimental verification is carried out, and a reasonable agreement is observed between the simulation and experimental results. Therefore, the polarization conversion metasurface has great potential application values in various polarization-controlled devices.
{"title":"An ultra-wideband ellipse-shaped linear-to-circular polarization conversion metasurface with high efficiency","authors":"B. Lin, Wenzhun Huang, Jianxin Guo, Yan-wen Wang, Hongjun Ye, Xiang Ji","doi":"10.1080/02726343.2022.2144062","DOIUrl":"https://doi.org/10.1080/02726343.2022.2144062","url":null,"abstract":"ABSTRACT In this work, a high-efficiency ultra-wideband ellipse-shaped linear-to-circular polarization conversion metasurface is proposed. The metasurface is composed of a square array of ellipse-shaped metal patches printed on grounded dielectric substrate and covered by a dielectric layer, because it is an orthogonal anisotropic structure with a pair of mutually perpendicular symmetric axes u and v along the directions ±45° with respect to the vertical y-axis, and the reflection phase difference under u- and v-polarized incidences is very close to −90° in an ultra-wide frequency ranges, both theoretical prediction and numerical simulation show that the metasurface can achieve high-efficiency ultra-wideband linear-to-circular polarization conversion under x- and y-polarized incidences, its 3-dB axial-ratio (AR) band is between 7.08 and 25.86 GHz with a relative bandwidth of 114%, in particular, the AR of its reflected wave can be kept lower than 0.89 dB in the frequency range 7.65–25.32 GHz, in which the polarization conversion rate (PCR) is always larger than 99.73%. Finally, one effective experimental verification is carried out, and a reasonable agreement is observed between the simulation and experimental results. Therefore, the polarization conversion metasurface has great potential application values in various polarization-controlled devices.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"389 - 400"},"PeriodicalIF":0.8,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49107574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-04DOI: 10.1080/02726343.2022.2118428
G. Sen, Aditi Sharma, Saptarshi Ghosh, Santanu Das
ABSTRACT In this letter, a dual-polarized dual-transmission frequency selective rasorber (FSR) geometry is demonstrated. The top layer of the FSR is built of a cross-dipole design loaded with chip resistors for obtaining a wideband absorption. In addition, two different split ring resonator patterns are printed at each side of the substrate connected by metallized vias to achieve two in-band transmission responses. The bottom layer is designed from a slot geometry to exhibit two transmission bands similar to that of the top layer. The overall FSR structure exhibits a −10 dB reflection response ranging from 2.0 GHz to 8.15 GHz (having a fractional bandwidth of 121%), with transmission peaks appearing at 4.2 GHz and 6.2 GHz having insertion losses of 2.3 dB and 2.9 dB, respectively. The unit cell topology is miniaturized with dimensions of 0.1λL×0.1λL, λL being the free space wavelength at the lowest operating frequency. The proposed FSR also satisfies polarization-insensitive characteristic and angular stability behavior for differentmodes. The working principle behind such wideband absorption and in-band transmission phenomena are analyzed and an equivalent circuit model is presented. A prototype of the proposed FSR is manufactured and measured, confirming the simulated responses.
{"title":"A wide inter-absorption dual-transmission dual-polarized frequency selective rasorber based on SRRs","authors":"G. Sen, Aditi Sharma, Saptarshi Ghosh, Santanu Das","doi":"10.1080/02726343.2022.2118428","DOIUrl":"https://doi.org/10.1080/02726343.2022.2118428","url":null,"abstract":"ABSTRACT In this letter, a dual-polarized dual-transmission frequency selective rasorber (FSR) geometry is demonstrated. The top layer of the FSR is built of a cross-dipole design loaded with chip resistors for obtaining a wideband absorption. In addition, two different split ring resonator patterns are printed at each side of the substrate connected by metallized vias to achieve two in-band transmission responses. The bottom layer is designed from a slot geometry to exhibit two transmission bands similar to that of the top layer. The overall FSR structure exhibits a −10 dB reflection response ranging from 2.0 GHz to 8.15 GHz (having a fractional bandwidth of 121%), with transmission peaks appearing at 4.2 GHz and 6.2 GHz having insertion losses of 2.3 dB and 2.9 dB, respectively. The unit cell topology is miniaturized with dimensions of 0.1λL×0.1λL, λL being the free space wavelength at the lowest operating frequency. The proposed FSR also satisfies polarization-insensitive characteristic and angular stability behavior for differentmodes. The working principle behind such wideband absorption and in-band transmission phenomena are analyzed and an equivalent circuit model is presented. A prototype of the proposed FSR is manufactured and measured, confirming the simulated responses.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"42 1","pages":"348 - 358"},"PeriodicalIF":0.8,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45754973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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