Pub Date : 2018-10-01DOI: 10.26866/jees.2019.19.4.266
Sungsik Wang, S. Yoo, H. Choo
This article proposes the design of a coupled fed printed dipole antenna for multi-band arrays. The antenna consists of the printed dipole and feeder to obtain the multiband operation. To confirm the DF capability of the proposed antenna, the pattern of the 4e4 arrays is observed by varying the steering angle.
{"title":"Design of a multi-band coupled fed printed dipole antenna as an array element for direction finding systems","authors":"Sungsik Wang, S. Yoo, H. Choo","doi":"10.26866/jees.2019.19.4.266","DOIUrl":"https://doi.org/10.26866/jees.2019.19.4.266","url":null,"abstract":"This article proposes the design of a coupled fed printed dipole antenna for multi-band arrays. The antenna consists of the printed dipole and feeder to obtain the multiband operation. To confirm the DF capability of the proposed antenna, the pattern of the 4e4 arrays is observed by varying the steering angle.","PeriodicalId":136076,"journal":{"name":"2018 International Symposium on Antennas and Propagation (ISAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126778377","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 : 2018-10-01DOI: 10.1587/COMEX.2019XBL0007
D. Iwamoto, Nana Narukawa, K. Honda, K. Ogawa
An experimental verification of angle of arrival (AOA) estimation that employs an RF-based interferometric monopulse technique is given for car applications. The AOA antenna is comprised of nine elements, eight of which are arranged in a circle and equal angular intervals of 45°; an additional element is located at the center of the circle. We used a weight network for processing the received signals, in which the phase of the received signals for each element is delayed in accordance with the coordinate of the elements using the different length of transmission lines. The use of a rat-race hybrid coupler allows a 180-degree phase reversal to be involved in the two combined signals, enabling a simple small-sized AOA network to be realized. The experimental results reveal that the AOA antenna has an error in the estimated angle of 6.1° on average in the whole azimuth angle.
{"title":"Experiments on Interferometric Angle of Arrival Estimation Using a Simple Weight Network","authors":"D. Iwamoto, Nana Narukawa, K. Honda, K. Ogawa","doi":"10.1587/COMEX.2019XBL0007","DOIUrl":"https://doi.org/10.1587/COMEX.2019XBL0007","url":null,"abstract":"An experimental verification of angle of arrival (AOA) estimation that employs an RF-based interferometric monopulse technique is given for car applications. The AOA antenna is comprised of nine elements, eight of which are arranged in a circle and equal angular intervals of 45°; an additional element is located at the center of the circle. We used a weight network for processing the received signals, in which the phase of the received signals for each element is delayed in accordance with the coordinate of the elements using the different length of transmission lines. The use of a rat-race hybrid coupler allows a 180-degree phase reversal to be involved in the two combined signals, enabling a simple small-sized AOA network to be realized. The experimental results reveal that the AOA antenna has an error in the estimated angle of 6.1° on average in the whole azimuth angle.","PeriodicalId":136076,"journal":{"name":"2018 International Symposium on Antennas and Propagation (ISAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132465397","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 : 2018-08-01DOI: 10.5515/kjkiees.2018.29.8.571
Chang hwan-sul, Y. Chung
The water content of the material affects the permittivity of the material, and changing the moisture content of the coffee bean changes the taste of coffee. The variation of the moisture content of coffee bean can be predicted by the change of the frequency and the return loss according to the change of the permittivity of the bean placed on the patch antenna. In this paper, dual-band patch antenna has been designed, a moisture measurement band 3.8Ghz $sim 4$ Ghz that can measure moisture level of the material, and a transmit and receive band of WIFI 2.45GHz. This paper proved that the level of return loss changes from 3.6 to 4 GHz when the moisture content of coffee bean changes from 2 to 15% according to the simulation and measurement. By using this antenna, the moisture levels of rice and other beans can be measured and can be applied to various applications.
{"title":"Dual-band Patch Antenna for Communication and Moisture Measurement of Coffee Bean","authors":"Chang hwan-sul, Y. Chung","doi":"10.5515/kjkiees.2018.29.8.571","DOIUrl":"https://doi.org/10.5515/kjkiees.2018.29.8.571","url":null,"abstract":"The water content of the material affects the permittivity of the material, and changing the moisture content of the coffee bean changes the taste of coffee. The variation of the moisture content of coffee bean can be predicted by the change of the frequency and the return loss according to the change of the permittivity of the bean placed on the patch antenna. In this paper, dual-band patch antenna has been designed, a moisture measurement band 3.8Ghz $sim 4$ Ghz that can measure moisture level of the material, and a transmit and receive band of WIFI 2.45GHz. This paper proved that the level of return loss changes from 3.6 to 4 GHz when the moisture content of coffee bean changes from 2 to 15% according to the simulation and measurement. By using this antenna, the moisture levels of rice and other beans can be measured and can be applied to various applications.","PeriodicalId":136076,"journal":{"name":"2018 International Symposium on Antennas and Propagation (ISAP)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132241574","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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