Pub Date : 2023-01-22DOI: 10.1109/RWS55624.2023.10046334
Qiangli Xi, Bin Zhang, L. Ran
The development of millimeter-wave phased array based on the digital beamforming architecture needs to overcome a physical-level challenge due to the contradiction between the massively integrated TR devices and the compact volume for thermal dissipation. In this work, we demonstrate an analog beamforming solution based on a reconfigurable Fresnel-zone-plate (RFZP) antenna for 28-GHz phased array. The proposed RFZP including $boldsymbol{16}timesboldsymbol{8}$ unit cells based on active frequency selective surface (FSS) with varactor diodes to implement a continuous $boldsymbol{180}^{boldsymbol{circ}}$ phase tunability. The measured scan ranges up to $pmboldsymbol{50}^{circ}$ and $pmboldsymbol{30}^{circ}$ at horizontal plane and vertical plane, respectively. The proposed RFZP antenna is an attractive solution for millimeter-wave beamforming.
{"title":"An mmWave FZP-Based Phased Array","authors":"Qiangli Xi, Bin Zhang, L. Ran","doi":"10.1109/RWS55624.2023.10046334","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046334","url":null,"abstract":"The development of millimeter-wave phased array based on the digital beamforming architecture needs to overcome a physical-level challenge due to the contradiction between the massively integrated TR devices and the compact volume for thermal dissipation. In this work, we demonstrate an analog beamforming solution based on a reconfigurable Fresnel-zone-plate (RFZP) antenna for 28-GHz phased array. The proposed RFZP including $boldsymbol{16}timesboldsymbol{8}$ unit cells based on active frequency selective surface (FSS) with varactor diodes to implement a continuous $boldsymbol{180}^{boldsymbol{circ}}$ phase tunability. The measured scan ranges up to $pmboldsymbol{50}^{circ}$ and $pmboldsymbol{30}^{circ}$ at horizontal plane and vertical plane, respectively. The proposed RFZP antenna is an attractive solution for millimeter-wave beamforming.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115320322","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046331
Armin Schuster, S. Erhardt, Torsten Reissland, R. Weigel
This paper describes a front-end architecture for an all-band direct sampling receiver. To evaluate the characteristics of this front-end, we conducted a S-parameter analysis to evaluate the performance of transmission and isolation of individual transmission channels. Our results prove high mutual isolation of the channels filtered by Multi-Layer Organic (MLO) filters. The effect of individual filter techniques is compared. Furthermore, the frequency planning is described. Finally, the usability of this front-end within a mobile network is discussed.
{"title":"Design and Analysis of a RF Front-End Receiver System Based on Multi-Layer Organic Filtering for Sub-6 GHz Mobile Communication Applications","authors":"Armin Schuster, S. Erhardt, Torsten Reissland, R. Weigel","doi":"10.1109/RWS55624.2023.10046331","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046331","url":null,"abstract":"This paper describes a front-end architecture for an all-band direct sampling receiver. To evaluate the characteristics of this front-end, we conducted a S-parameter analysis to evaluate the performance of transmission and isolation of individual transmission channels. Our results prove high mutual isolation of the channels filtered by Multi-Layer Organic (MLO) filters. The effect of individual filter techniques is compared. Furthermore, the frequency planning is described. Finally, the usability of this front-end within a mobile network is discussed.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114893773","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046335
Samira Faghih-Naini, Sebastian Peters, Thomas Kurin, S. Erhardt, Torsten Reissland, R. Weigel
A new transceiver setup for joint communication and sensing (JCAS) application in V-band with a 3 dB bandwidth of 2.57 GHz is presented in this work. With new communication standards like 6G and a rising amount of wireless transmitted data, new transceiver setups for higher carrier frequencies and larger bandwidth need to be developed. The new transceiver setup has differential IQ input ports and a carrier frequency ranging from 57 GHz to 64 GHz. For the proof of radar and communication applications, the reflected IQ signal was detected, and the usability confirmed. This setup can be used for JCAS applications in meter range with high resolution and data rates.
{"title":"Transceiver Setup for Joint Communication and Sensing Applications in V-Band","authors":"Samira Faghih-Naini, Sebastian Peters, Thomas Kurin, S. Erhardt, Torsten Reissland, R. Weigel","doi":"10.1109/RWS55624.2023.10046335","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046335","url":null,"abstract":"A new transceiver setup for joint communication and sensing (JCAS) application in V-band with a 3 dB bandwidth of 2.57 GHz is presented in this work. With new communication standards like 6G and a rising amount of wireless transmitted data, new transceiver setups for higher carrier frequencies and larger bandwidth need to be developed. The new transceiver setup has differential IQ input ports and a carrier frequency ranging from 57 GHz to 64 GHz. For the proof of radar and communication applications, the reflected IQ signal was detected, and the usability confirmed. This setup can be used for JCAS applications in meter range with high resolution and data rates.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116150492","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046348
C. Karpuz, Ali Kürsad Görür, Mehmet Çakir, Alperen Cengiz, A. Gorur
In this paper, a new approach based on the utilization of narrow slits to improve the return loss and isolation levels of the Wilkinson power dividers is proposed. 2-, 4- and 8-way power dividers are designed by using narrow slits on the quarter wavelength transmission lines. The proposed circuits are designed at the center frequencies of 2, 2.1 and 2.05 GHz. The fractional bandwidths (FBWs) for the return loss of better than 15 dB and isolation levels of better than 20 dB are 19.7%, 28%, 28.2 % for 2-, 4-, and 8-way power dividers, respectively. The proposed method can also reduce the circuit size about 25 % and more in the 2-way and 4-way (8-way) circuits, respectively. Three circuits have been fabricated and measured in a very good agreement with the simulated results.
{"title":"Compact Wilkinson Power Dividers Based on Narrow Slits Loaded Transmission Lines","authors":"C. Karpuz, Ali Kürsad Görür, Mehmet Çakir, Alperen Cengiz, A. Gorur","doi":"10.1109/RWS55624.2023.10046348","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046348","url":null,"abstract":"In this paper, a new approach based on the utilization of narrow slits to improve the return loss and isolation levels of the Wilkinson power dividers is proposed. 2-, 4- and 8-way power dividers are designed by using narrow slits on the quarter wavelength transmission lines. The proposed circuits are designed at the center frequencies of 2, 2.1 and 2.05 GHz. The fractional bandwidths (FBWs) for the return loss of better than 15 dB and isolation levels of better than 20 dB are 19.7%, 28%, 28.2 % for 2-, 4-, and 8-way power dividers, respectively. The proposed method can also reduce the circuit size about 25 % and more in the 2-way and 4-way (8-way) circuits, respectively. Three circuits have been fabricated and measured in a very good agreement with the simulated results.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126443064","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046202
Hui Lu, Markus Heyder, Marvin Wenzel, Nils C. Albrecht, Dominik Langer, Alexander Koelpin
Heart rate is one of the most critical and important vital signs in healthcare. While electrocardiography (ECG) is gold-standard procedure for heart rate monitoring, contactless monitoring is preferred in many applications like long-term monitoring. Radar systems enable contactless sensing by measuring small movements on the chest induced by the heart beat. In this paper, we present a machine learning-based method using a bidirectional gated recurrent unit (bi-GRU) network for accurate heartbeat detection. Band-pass filtered in-phase (I) and quadrature (Q) signals in heart sound and pulse wave frequency ranges were fused. The proposed method achieves a high F1 score of 98.06% for heart beat detection, thus outperforming the state-of-the-art method with an F1 score of 95.62% in the resting scenario. In the tilt-up scenario with the tilt table, F1 score is significantly improved by 10%. Besides, a median inter-beat intervals (IBIs) RMSE of only 22.07 ms in the resting scenario is realized.
{"title":"Accurate Heart Beat Detection with Doppler Radar using Bidirectional GRU Network","authors":"Hui Lu, Markus Heyder, Marvin Wenzel, Nils C. Albrecht, Dominik Langer, Alexander Koelpin","doi":"10.1109/RWS55624.2023.10046202","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046202","url":null,"abstract":"Heart rate is one of the most critical and important vital signs in healthcare. While electrocardiography (ECG) is gold-standard procedure for heart rate monitoring, contactless monitoring is preferred in many applications like long-term monitoring. Radar systems enable contactless sensing by measuring small movements on the chest induced by the heart beat. In this paper, we present a machine learning-based method using a bidirectional gated recurrent unit (bi-GRU) network for accurate heartbeat detection. Band-pass filtered in-phase (I) and quadrature (Q) signals in heart sound and pulse wave frequency ranges were fused. The proposed method achieves a high F1 score of 98.06% for heart beat detection, thus outperforming the state-of-the-art method with an F1 score of 95.62% in the resting scenario. In the tilt-up scenario with the tilt table, F1 score is significantly improved by 10%. Besides, a median inter-beat intervals (IBIs) RMSE of only 22.07 ms in the resting scenario is realized.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"2197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130132720","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046319
Nils C. Albrecht, Markus Heyder, Marvin Wenzel, Dominik Langer, Hui Lu, Alexander Koelpin
This contribution presents a 122 GHz continuous wave (CW) radar system capable of detecting human heart sounds over a distance of at least five meters. A bidirectional long short-term memory (LSTM) neural network is used to extract precise inter-beat-intervals (IBIs) from the radar data. A small-scale human trial with two persons is carried out, and the resulting accuracy of the system is compared to a gold-standard electrocardiogram (ECG). The proposed system shows a mean absolute error of 5 ms and a standard deviation (SD) of 63 ms compared to the ECG IBIs.
{"title":"Long-Distance Heart Sound Detection using 122 GHz CW Radar with 3D Printed High-Gain Antennas","authors":"Nils C. Albrecht, Markus Heyder, Marvin Wenzel, Dominik Langer, Hui Lu, Alexander Koelpin","doi":"10.1109/RWS55624.2023.10046319","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046319","url":null,"abstract":"This contribution presents a 122 GHz continuous wave (CW) radar system capable of detecting human heart sounds over a distance of at least five meters. A bidirectional long short-term memory (LSTM) neural network is used to extract precise inter-beat-intervals (IBIs) from the radar data. A small-scale human trial with two persons is carried out, and the resulting accuracy of the system is compared to a gold-standard electrocardiogram (ECG). The proposed system shows a mean absolute error of 5 ms and a standard deviation (SD) of 63 ms compared to the ECG IBIs.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130215380","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046292
Ryota Kawasaki, A. Kajiwara
Many fatal traffic accidents caused by professional drivers are attributed not only to fatigue and stress, but also to heart and cardiovascular disease. Heartbeat interval (HBI) is one of very important vital signs which indicate sudden change in driver's physical condition such as heart disease and stress. And blood pressure, especially continuous blood pressure (CBP), is associated with cardiovascular disease. However, there are no reports on driver's HBI and CBP monitoring as far as the authors know. This paper presents a millimeter-wave vital signs sensor to simultaneously monitor driver's HBI and CBP in a non-contact manner. Measurement was conducted while driving and each measured vital sign was evaluated using correlation analysis and Bland-Altman with a fingertip photo-plethysmograph and cuff-based BP monitor.
{"title":"Driver's vital-signs monitoring with a single 60GHz sensor","authors":"Ryota Kawasaki, A. Kajiwara","doi":"10.1109/RWS55624.2023.10046292","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046292","url":null,"abstract":"Many fatal traffic accidents caused by professional drivers are attributed not only to fatigue and stress, but also to heart and cardiovascular disease. Heartbeat interval (HBI) is one of very important vital signs which indicate sudden change in driver's physical condition such as heart disease and stress. And blood pressure, especially continuous blood pressure (CBP), is associated with cardiovascular disease. However, there are no reports on driver's HBI and CBP monitoring as far as the authors know. This paper presents a millimeter-wave vital signs sensor to simultaneously monitor driver's HBI and CBP in a non-contact manner. Measurement was conducted while driving and each measured vital sign was evaluated using correlation analysis and Bland-Altman with a fingertip photo-plethysmograph and cuff-based BP monitor.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123507024","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046311
Shuai Deng, Jin Li, Tao Yuan
In this paper, a size-compact and wideband millimeter-wave dual-polarized (DP) spherical resonator antenna is proposed. The dual-polarization behavior of the antenna is attributed to a highly symmetrical geometry of the spherical resonator and orthogonality of the resonant modes inside. The wideband and stable DP radiation performance is enabled by a single quasicruci-form radiation aperture that is essentially a combination of two orthogonal elliptical slots. The configuration as such enhances mechanical strength of the radiation structure and effectively improves the antenna reliability for applications at millimeter-wave frequencies. A Ka-band DP antenna prototype is demonstrated. The antenna prototype is manufactured monolithically by using polymer-based Polyjet 3-D printing and electroless copper plating processes. The RF-measured result of the antenna in one of the polarization orientations is in good agreement with the simulated one, validating wideband and stable radiation performance from 26.5 to 39 GHz (a relative bandwidth of 38.2%) with an in-band reflection coefficient of less than -10 dB and peak realized gains of 7–9 dBi.
{"title":"A Compact 3-D-Printing-Compatible Dual-Polarized Spherical Resonator Antenna With Improved Bandwidth and Reliability","authors":"Shuai Deng, Jin Li, Tao Yuan","doi":"10.1109/RWS55624.2023.10046311","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046311","url":null,"abstract":"In this paper, a size-compact and wideband millimeter-wave dual-polarized (DP) spherical resonator antenna is proposed. The dual-polarization behavior of the antenna is attributed to a highly symmetrical geometry of the spherical resonator and orthogonality of the resonant modes inside. The wideband and stable DP radiation performance is enabled by a single quasicruci-form radiation aperture that is essentially a combination of two orthogonal elliptical slots. The configuration as such enhances mechanical strength of the radiation structure and effectively improves the antenna reliability for applications at millimeter-wave frequencies. A Ka-band DP antenna prototype is demonstrated. The antenna prototype is manufactured monolithically by using polymer-based Polyjet 3-D printing and electroless copper plating processes. The RF-measured result of the antenna in one of the polarization orientations is in good agreement with the simulated one, validating wideband and stable radiation performance from 26.5 to 39 GHz (a relative bandwidth of 38.2%) with an in-band reflection coefficient of less than -10 dB and peak realized gains of 7–9 dBi.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122098753","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046346
Xenofon Konstantinou, Nicholas Sturim, J. Albrecht, P. Chahal, J. Papapolymerou
This work focuses on the unique capabilities that aerosol jet printing (AJP) provides for manufacturing transmit/receive RF front-end modules for microwave and mm-wave applications. We demonstrate an additively manufactured (AM) transmitter system-on-antenna (SoA) at Ku-band, with the transmitter circuit being fully AM packaged on a conventionally manufactured Vivaldi antenna. The entire package is printed on-antenna via AJP around an amplifier die using a chip-first approach. Our transmit module achieves radiated power levels of 0.4-0.66 W, higher than other Ku-band SoAs in the literature. This work shows it is possible to realize high-functional-density RF front-end modules fully via AJP, overcoming the performance bottlenecks introduced by conventional manufacturing methods and reducing prototyping cost and time.
{"title":"A Power-Efficient Compact Ku-Band System-on-Antenna Module with Chip-First Package Integration","authors":"Xenofon Konstantinou, Nicholas Sturim, J. Albrecht, P. Chahal, J. Papapolymerou","doi":"10.1109/RWS55624.2023.10046346","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046346","url":null,"abstract":"This work focuses on the unique capabilities that aerosol jet printing (AJP) provides for manufacturing transmit/receive RF front-end modules for microwave and mm-wave applications. We demonstrate an additively manufactured (AM) transmitter system-on-antenna (SoA) at Ku-band, with the transmitter circuit being fully AM packaged on a conventionally manufactured Vivaldi antenna. The entire package is printed on-antenna via AJP around an amplifier die using a chip-first approach. Our transmit module achieves radiated power levels of 0.4-0.66 W, higher than other Ku-band SoAs in the literature. This work shows it is possible to realize high-functional-density RF front-end modules fully via AJP, overcoming the performance bottlenecks introduced by conventional manufacturing methods and reducing prototyping cost and time.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128417056","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 : 2023-01-22DOI: 10.1109/RWS55624.2023.10046327
Wesley Spain, J. Papapolymerou, P. Chahal, J. Albrecht
Advancements in additive manufacturing techniques provide attractive options for RF systems fabrication and development, particularly with respect to heterogeneous integration of bare die components. To facilitate the inclusion of these parts, a new Aerosol-Jet Printed (AJP) die attach method utilizing a patterned combination of adhesive and conductive inks is demonstrated to improve chip leveling and CTE match with die fill materials. In this paper, a patterned combination of printed Benzocyclobutene (BCB) and silver nanoparticle inks are investigated as the primary adhesive and conductive materials respectively. Several dies are tested using this attach method, including S-parameter measurements from attenuator dies with less than 2 dB loss in the 0–20 GHz frequency range. Finally, a Ku-band transmit module where all die level components utilize the proposed attach method is demonstrated, producing more than 34 dBm output power from 13 to 17 GHz.
{"title":"Patterned Multi-Material Die Attach Process Using Aerosol-Jet Printing","authors":"Wesley Spain, J. Papapolymerou, P. Chahal, J. Albrecht","doi":"10.1109/RWS55624.2023.10046327","DOIUrl":"https://doi.org/10.1109/RWS55624.2023.10046327","url":null,"abstract":"Advancements in additive manufacturing techniques provide attractive options for RF systems fabrication and development, particularly with respect to heterogeneous integration of bare die components. To facilitate the inclusion of these parts, a new Aerosol-Jet Printed (AJP) die attach method utilizing a patterned combination of adhesive and conductive inks is demonstrated to improve chip leveling and CTE match with die fill materials. In this paper, a patterned combination of printed Benzocyclobutene (BCB) and silver nanoparticle inks are investigated as the primary adhesive and conductive materials respectively. Several dies are tested using this attach method, including S-parameter measurements from attenuator dies with less than 2 dB loss in the 0–20 GHz frequency range. Finally, a Ku-band transmit module where all die level components utilize the proposed attach method is demonstrated, producing more than 34 dBm output power from 13 to 17 GHz.","PeriodicalId":110742,"journal":{"name":"2023 IEEE Radio and Wireless Symposium (RWS)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128154071","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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