Pub Date : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066889
Amir R. Ali, M. Algohary, Maram Wael, Jessica Magdy
The olfactory ability of humanoid robots makes them more human, it gives them one of the five main senses. A scalable sensor prototype based on an optical phenomenon known as whispering gallery modes (WGMs) in polymeric resonators was designed for odorant detection. The olfactory sensor will act as an electronic nose (E-Nose) for the humanoid robots. The polydimethylsiloxane (PDMS) is the main material for the proposed sensor; once the odorant starts to propagates inside this polymeric material it will leads to a change in the sensors morphology then the detection for the odor will be captured based on the corresponding shift on the transmission spectrum for the wavelengths of the WGM. To increase the reliability and lifetime of the sensor, the polymeric cavity was created and sealed from the environment with a permeable PDMS membrane which only allows odor to reach the polymeric resonator. A study was conducted using PDMS membranes of different thicknesses to verify and study the sensor sensitivity. Also, a tracking algorithm based on signal cross-correlation was used for accurate WGM wavelength shift quantification which can also be programmed on a real-time platform for portability. This allows for easy utilization of the WGM as an olfactory prosthetic.
{"title":"E-Nose for Odor Detection of Humanoid Robots Based on Micro Opto-Mechatronics Sensors","authors":"Amir R. Ali, M. Algohary, Maram Wael, Jessica Magdy","doi":"10.1109/IMAS55807.2023.10066889","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066889","url":null,"abstract":"The olfactory ability of humanoid robots makes them more human, it gives them one of the five main senses. A scalable sensor prototype based on an optical phenomenon known as whispering gallery modes (WGMs) in polymeric resonators was designed for odorant detection. The olfactory sensor will act as an electronic nose (E-Nose) for the humanoid robots. The polydimethylsiloxane (PDMS) is the main material for the proposed sensor; once the odorant starts to propagates inside this polymeric material it will leads to a change in the sensors morphology then the detection for the odor will be captured based on the corresponding shift on the transmission spectrum for the wavelengths of the WGM. To increase the reliability and lifetime of the sensor, the polymeric cavity was created and sealed from the environment with a permeable PDMS membrane which only allows odor to reach the polymeric resonator. A study was conducted using PDMS membranes of different thicknesses to verify and study the sensor sensitivity. Also, a tracking algorithm based on signal cross-correlation was used for accurate WGM wavelength shift quantification which can also be programmed on a real-time platform for portability. This allows for easy utilization of the WGM as an olfactory prosthetic.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114404562","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066949
Pedro Falcão, C. Peixeiro
An antenna system based on a wideband printed monopole is proposed for the estimation of electromagnetic field radiation in the frequency range 0.7-3.5 GHz. Such system is envisaged to be integrated into protective vests worn by professional users in their working space environment as part of an intelligent multi-risk protection. Four dual-linearly polarized monopoles are integrated into the coat (chest, back, left and right shoulders) and an extra one in the helmet. Numerical simulation results, for the antenna system integrated into a simplified phantom model of the human torso and head indicate that the proposed solution can provide the required electromagnetic field evaluation.
{"title":"Wearable Wideband Printed Monopole Antenna System for Electromagnetic Field Estimation","authors":"Pedro Falcão, C. Peixeiro","doi":"10.1109/IMAS55807.2023.10066949","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066949","url":null,"abstract":"An antenna system based on a wideband printed monopole is proposed for the estimation of electromagnetic field radiation in the frequency range 0.7-3.5 GHz. Such system is envisaged to be integrated into protective vests worn by professional users in their working space environment as part of an intelligent multi-risk protection. Four dual-linearly polarized monopoles are integrated into the coat (chest, back, left and right shoulders) and an extra one in the helmet. Numerical simulation results, for the antenna system integrated into a simplified phantom model of the human torso and head indicate that the proposed solution can provide the required electromagnetic field evaluation.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128400897","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066942
Raju Malleboina, J. C. Dash, Atli Lemma, D. Sarkar
This paper investigates the minimum size of the metasurface needed for beam steering applications using anomalous reflection. First, using 1-bit and 2-bit digitally coded unit cells, we analytically model a programmable metasurface in MATLAB for a reflected beam direction of $theta_{r}=30^{circ}, phi_{r}=0^{circ}$, and perform the far-field radiation pattern analysis for different aperture sizes. We observe the metasurface size of $10lambda_{0}times 10lambda_{0}$ (where $lambda_{0}$ is the free-space wavelength at 10.5 GHz) provides anomalous reflection in the desired direction having beamwidth of nearly 5° for both 1-bit and 2-bit coding. We verify the reflection angle and half-power beamwidth (HPBW) obtained from the analytical method with the full-wave electromagnetic simulation using CST Microwave Studio. It is also observed that the 2-bit coded metasurface having $10lambda_{0}times 10lambda_{0}$ size provides a far-field pattern with a reduced sidelobe level (SLL) of nearly −11.54 dB compared to 1-bit.
{"title":"On the Aperture Size of Digitally Coded Metasurfaces for Beam Steering Applications using Anomalous Reflection","authors":"Raju Malleboina, J. C. Dash, Atli Lemma, D. Sarkar","doi":"10.1109/IMAS55807.2023.10066942","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066942","url":null,"abstract":"This paper investigates the minimum size of the metasurface needed for beam steering applications using anomalous reflection. First, using 1-bit and 2-bit digitally coded unit cells, we analytically model a programmable metasurface in MATLAB for a reflected beam direction of $theta_{r}=30^{circ}, phi_{r}=0^{circ}$, and perform the far-field radiation pattern analysis for different aperture sizes. We observe the metasurface size of $10lambda_{0}times 10lambda_{0}$ (where $lambda_{0}$ is the free-space wavelength at 10.5 GHz) provides anomalous reflection in the desired direction having beamwidth of nearly 5° for both 1-bit and 2-bit coding. We verify the reflection angle and half-power beamwidth (HPBW) obtained from the analytical method with the full-wave electromagnetic simulation using CST Microwave Studio. It is also observed that the 2-bit coded metasurface having $10lambda_{0}times 10lambda_{0}$ size provides a far-field pattern with a reduced sidelobe level (SLL) of nearly −11.54 dB compared to 1-bit.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128469897","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066880
Ahmed Hamed Mahmoud, A. Ismail
This paper presents an inductor-less CMOS current-reuse common-source ultrawideband amplifier, operating in the 1.5-9.3-GHz range. The LNA uses resistive feedback for wideband input matching thus forming a self-biased inverter-based amplifier; however, a novel buffering scheme is used in conjunction with the amplifier to avoid loading from the resistive feedback. The LNA was designed using the tsmc 65-nm process and it achieves ($S_{11}$) of better than −11.6 dB across the entire bandwidth, maximum $S_{21}$ of 13.2 dB with 3-dB bandwidth of 7.8 GHz, noise-figure of 1.9-2 dB with only 0.1 dB variation across the entire bandwidth of 1.5-9.3-GHz, $IIP_{3}$ of −4.6 dBm at 6 GHz fundamental frequency with 100 MHz tone separation. The power consumption is limited to 4.5 mW while operating under 1-V supply.
{"title":"An Inductor-less Current-Reuse CS LNA with Resistive-Feedback for Low-Noise Applications","authors":"Ahmed Hamed Mahmoud, A. Ismail","doi":"10.1109/IMAS55807.2023.10066880","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066880","url":null,"abstract":"This paper presents an inductor-less CMOS current-reuse common-source ultrawideband amplifier, operating in the 1.5-9.3-GHz range. The LNA uses resistive feedback for wideband input matching thus forming a self-biased inverter-based amplifier; however, a novel buffering scheme is used in conjunction with the amplifier to avoid loading from the resistive feedback. The LNA was designed using the tsmc 65-nm process and it achieves ($S_{11}$) of better than −11.6 dB across the entire bandwidth, maximum $S_{21}$ of 13.2 dB with 3-dB bandwidth of 7.8 GHz, noise-figure of 1.9-2 dB with only 0.1 dB variation across the entire bandwidth of 1.5-9.3-GHz, $IIP_{3}$ of −4.6 dBm at 6 GHz fundamental frequency with 100 MHz tone separation. The power consumption is limited to 4.5 mW while operating under 1-V supply.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116259807","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066934
Wen Sun, Xiao-dong Chen, Long Qian
This paper presents our study on a circularly polarized (CP) beam steering quadrifilar helix antenna (QHA) for the applications of wireless communication, satellite navigation and wireless power transmission. The proposed antenna is composed of four helical wires with variable feeding phase differences, which is different from a conventional QHA. It is shown to realize one cardioid pattern towards the broadside, and four off-boresight tilted beams over a half space by controlling phases on the helix elements in simulation. A feeding network was developed to excite the broadside and tilted beam modes for proving the concept in experiment. The measured results of the broadside radiation mode are in good agreement with the simulated ones. The impedance bandwidth of the proposed antenna can cover 1.26-1.65 GHz with a 3-dB axial ratio bandwidth of 1.1-1.8 GHz. The gain in the whole working band is higher than 2.1 dBi. And over 70% radiation efficiency can be achieved.
{"title":"A Circularly Polarized Quadrifilar Helix Antenna With Steerable Beam","authors":"Wen Sun, Xiao-dong Chen, Long Qian","doi":"10.1109/IMAS55807.2023.10066934","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066934","url":null,"abstract":"This paper presents our study on a circularly polarized (CP) beam steering quadrifilar helix antenna (QHA) for the applications of wireless communication, satellite navigation and wireless power transmission. The proposed antenna is composed of four helical wires with variable feeding phase differences, which is different from a conventional QHA. It is shown to realize one cardioid pattern towards the broadside, and four off-boresight tilted beams over a half space by controlling phases on the helix elements in simulation. A feeding network was developed to excite the broadside and tilted beam modes for proving the concept in experiment. The measured results of the broadside radiation mode are in good agreement with the simulated ones. The impedance bandwidth of the proposed antenna can cover 1.26-1.65 GHz with a 3-dB axial ratio bandwidth of 1.1-1.8 GHz. The gain in the whole working band is higher than 2.1 dBi. And over 70% radiation efficiency can be achieved.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132646453","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066917
A. M. Mahfouz, S. Shams, Mahmoud Elsaadany, A. Kishk
Radiation pattern synthesis of a planar antenna array using relative elements axial rotation is proposed to generate broadside flattop or cosecant beams for surveillance, radars, and mobile communications. For a proof of concept, 5 x 5 planar Hertzian dipoles are utilized to synthesize all space-desired radiation patterns over a solid angle ratio of 13.4%. The rotation of each element is adjusted using a built-in MATLAB-based particle swarm optimization (PSO) technique. The deployed algorithm can be extended to include more elements and deploy different radiating elements.
提出了一种利用相对单元轴向旋转的平面天线阵列的辐射方向图合成方法，以产生用于监视、雷达和移动通信的侧面平顶或余割波束。为了验证概念，利用5 x 5平面赫兹偶极子在13.4%的立体角比上合成所有空间所需的辐射模式。每个元素的旋转使用内置的基于matlab的粒子群优化(PSO)技术进行调整。所部署的算法可以扩展为包含更多元素并部署不同的辐射元素。
{"title":"Planar Array Radiation Pattern Synthesis Using Relative Elements Axial Rotation","authors":"A. M. Mahfouz, S. Shams, Mahmoud Elsaadany, A. Kishk","doi":"10.1109/IMAS55807.2023.10066917","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066917","url":null,"abstract":"Radiation pattern synthesis of a planar antenna array using relative elements axial rotation is proposed to generate broadside flattop or cosecant beams for surveillance, radars, and mobile communications. For a proof of concept, 5 x 5 planar Hertzian dipoles are utilized to synthesize all space-desired radiation patterns over a solid angle ratio of 13.4%. The rotation of each element is adjusted using a built-in MATLAB-based particle swarm optimization (PSO) technique. The deployed algorithm can be extended to include more elements and deploy different radiating elements.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127724625","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066902
Abdulrahman Alshehry
Planar surface wave excitation provides two-dimensional wireless communication when compared to traditional wired and space communication systems. In this paper, a novel design of wide-band, low-profile quasi-rectangular aperture with a compact CPW surface wave launcher is developed. The proposed design provides a slotted Co-planar wave guide fed by 50 Ω coaxial cable through quasi-rectangular wave guide to excite a surface wave on high reactive surface impedance. When compared to surface wave launchers approached, the proposed design has the ability to excite high-efficiency surface wave travel along a reactive platform. The surface wave launcher is designed for millimeter-wave and 5G communication systems with a frequency band between 22 GHz to 30 GHz. It has a wide band width of 22 GHz and 30 GHz and low return loss of-10 dB.
{"title":"Design of Wideband, Low Profile Quasi-Rectangular Planar Surface Wave Launcher Fed by CPW Slot for 5G Applications","authors":"Abdulrahman Alshehry","doi":"10.1109/IMAS55807.2023.10066902","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066902","url":null,"abstract":"Planar surface wave excitation provides two-dimensional wireless communication when compared to traditional wired and space communication systems. In this paper, a novel design of wide-band, low-profile quasi-rectangular aperture with a compact CPW surface wave launcher is developed. The proposed design provides a slotted Co-planar wave guide fed by 50 Ω coaxial cable through quasi-rectangular wave guide to excite a surface wave on high reactive surface impedance. When compared to surface wave launchers approached, the proposed design has the ability to excite high-efficiency surface wave travel along a reactive platform. The surface wave launcher is designed for millimeter-wave and 5G communication systems with a frequency band between 22 GHz to 30 GHz. It has a wide band width of 22 GHz and 30 GHz and low return loss of-10 dB.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134639838","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066937
Y. Ehab, Ahmed A. Naguib, H. Ahmed
This paper presents an ultra-low phase noise and low-power CMOS LC VCO intended for 5G applications. The proposed design adopts a class-B voltage-biased topology besides incorporating high Q common mode harmonic resonance for ultra-low phase noise performance. Moreover, the design exploits the inherent current reuse mechanism of the complementary cross-coupled configuration to attain a low power consumption level. Furthermore, targeting a sufficient wide tuning range for wideband operation, the designed VCO incorporates both continuous tuning using a low $k_{vco}$ controllable varactor and discrete capacitive tuning through a proposed optimal NMOS-based digitally controlled varactor bank. Designed and simulated in a standard 65 nm RF CMOS technology, the proposed VCO achieves a 16% wide tuning range from 9.2 GHz to 10.8 GHz while consuming a total current of 2.4 mA from a 1 V power supply. Simulated phase noise results showed ultra-low thermal phase noise levels of −124.8 dBc/Hz and −144.8 dBc/Hz at 1 MHz and 10 MHz frequency offsets respectively, while additionally achieving an ultra-low flicker phase noise of −57 dBc/Hz at 1kHz with an outstanding 3.5 $text{kHz} 1/f^{3}$ corner frequency. Accordingly, the designed VCO successfully achieves a superior state-of-the-art peak FoM of 201.7 dBc/Hz and a corresponding 205.7 dBc/Hz FoMT at 1 MHz offsets, which are remarkably the best simulated VCO FoMs of the recently published 10 GHz VCOs.
{"title":"An Ultra-Low Phase Noise Low-Power 10-GHz LC VCO with High-Q Common-Mode Harmonic Resonance for 5G Systems","authors":"Y. Ehab, Ahmed A. Naguib, H. Ahmed","doi":"10.1109/IMAS55807.2023.10066937","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066937","url":null,"abstract":"This paper presents an ultra-low phase noise and low-power CMOS LC VCO intended for 5G applications. The proposed design adopts a class-B voltage-biased topology besides incorporating high Q common mode harmonic resonance for ultra-low phase noise performance. Moreover, the design exploits the inherent current reuse mechanism of the complementary cross-coupled configuration to attain a low power consumption level. Furthermore, targeting a sufficient wide tuning range for wideband operation, the designed VCO incorporates both continuous tuning using a low $k_{vco}$ controllable varactor and discrete capacitive tuning through a proposed optimal NMOS-based digitally controlled varactor bank. Designed and simulated in a standard 65 nm RF CMOS technology, the proposed VCO achieves a 16% wide tuning range from 9.2 GHz to 10.8 GHz while consuming a total current of 2.4 mA from a 1 V power supply. Simulated phase noise results showed ultra-low thermal phase noise levels of −124.8 dBc/Hz and −144.8 dBc/Hz at 1 MHz and 10 MHz frequency offsets respectively, while additionally achieving an ultra-low flicker phase noise of −57 dBc/Hz at 1kHz with an outstanding 3.5 $text{kHz} 1/f^{3}$ corner frequency. Accordingly, the designed VCO successfully achieves a superior state-of-the-art peak FoM of 201.7 dBc/Hz and a corresponding 205.7 dBc/Hz FoMT at 1 MHz offsets, which are remarkably the best simulated VCO FoMs of the recently published 10 GHz VCOs.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115098611","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066912
Yazan Al-Alem, Syed M. Sifat, Y. Antar, A. Kishk
We propose an efficient high gain millimeter-wave planar antenna array. The packaging of the antenna array feeding structure is eliminated by aggregating the feeding network in between the antenna elements, which has a significant advantage in maintaining neat and symmetric radiation characteristics with low cross polarization level. The proposed antenna array is extremely low in cost and can be used as either a linearly or circularly polarized antenna array. The antenna array has a realized gain of 20 dBi in both scenarios. The matching bandwidth is 4.1 % and the 3-dB axial ratio bandwidth is 6%. The antenna array only uses a single substrate layer with no need for any vias. To switch to circular polarization operation, a 3D printed dielectric polarizer is used. The proposed antenna array suits well various applications at 24 GHz, while maintaining high performance metrics, and extremely low cost. The antenna array can be easily integrated with transceivers due to the use of printed microstrip line technology.
{"title":"Millimeter-Wave Planar Antenna Array for Radar and Sensing Applications","authors":"Yazan Al-Alem, Syed M. Sifat, Y. Antar, A. Kishk","doi":"10.1109/IMAS55807.2023.10066912","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066912","url":null,"abstract":"We propose an efficient high gain millimeter-wave planar antenna array. The packaging of the antenna array feeding structure is eliminated by aggregating the feeding network in between the antenna elements, which has a significant advantage in maintaining neat and symmetric radiation characteristics with low cross polarization level. The proposed antenna array is extremely low in cost and can be used as either a linearly or circularly polarized antenna array. The antenna array has a realized gain of 20 dBi in both scenarios. The matching bandwidth is 4.1 % and the 3-dB axial ratio bandwidth is 6%. The antenna array only uses a single substrate layer with no need for any vias. To switch to circular polarization operation, a 3D printed dielectric polarizer is used. The proposed antenna array suits well various applications at 24 GHz, while maintaining high performance metrics, and extremely low cost. The antenna array can be easily integrated with transceivers due to the use of printed microstrip line technology.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116863107","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 : 2023-02-07DOI: 10.1109/IMAS55807.2023.10066928
O. Terra, Haitham M. Hussein, H. Kotb
Measuring distance in air accurately is of a great importance for several applications such as surveying and metrology. The technique proposed here is based on measuring more than 50 m in air by measuring the change in repetition rate in a passively mode-locked laser when the measured distance be part of its cavity. The measurement uncertainty reached $21 mu mathrm{m}$ for the maximum measured distance.
在测量、计量等领域，精确测量空气中的距离具有重要意义。本文提出的技术是通过测量被动锁模激光器在空气中超过50米的距离，当测量距离为其腔的一部分时，重复率的变化来测量。最大测量距离的测量不确定度达到$21 mu mathrm{m}$。
{"title":"Distance Measurement System Based on Mode-Locked Laser","authors":"O. Terra, Haitham M. Hussein, H. Kotb","doi":"10.1109/IMAS55807.2023.10066928","DOIUrl":"https://doi.org/10.1109/IMAS55807.2023.10066928","url":null,"abstract":"Measuring distance in air accurately is of a great importance for several applications such as surveying and metrology. The technique proposed here is based on measuring more than 50 m in air by measuring the change in repetition rate in a passively mode-locked laser when the measured distance be part of its cavity. The measurement uncertainty reached $21 mu mathrm{m}$ for the maximum measured distance.","PeriodicalId":246624,"journal":{"name":"2023 International Microwave and Antenna Symposium (IMAS)","volume":"394 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120875493","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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