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2013 Conference on Microwave Techniques (COMITE)最新文献

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Design a 3.5 slot antenna using coplanar waveguide (CPW) for dual band application 采用共面波导(CPW)设计了一种用于双频应用的3.5槽天线
2013 Conference on Microwave Techniques (COMITE) Pub Date : 2013-04-17 DOI: 10.1109/COMITE.2013.6545038
M. Abd Aziz, M. M. Shukor, M. K. Suaidi, B. Ahmad, M. Othman, N. Hasan
{"title":"Design a 3.5 slot antenna using coplanar waveguide (CPW) for dual band application","authors":"M. Abd Aziz, M. M. Shukor, M. K. Suaidi, B. Ahmad, M. Othman, N. Hasan","doi":"10.1109/COMITE.2013.6545038","DOIUrl":"https://doi.org/10.1109/COMITE.2013.6545038","url":null,"abstract":"The proposed antenna is designed to overcome the demand in dual band issues. The basic shape structures of antenna are designed at frequency 2.4 GHz based on radiating structure 5 and 5.2 GHz based on radiating structure 3. Then, the changes on the position of radiating structure 3 have been carried out to investigate the effect for dual band. The coplanar waveguide technique is used to design the basic structure 3.5 antenna to achieve dual band resonant frequencies. Then, the position of the radiating structure 3 is turned to 90° so that the resonant frequencies can achieve at 2.4 GHz and 5.2 GHz. The results from the simulations were then validated with experimental measurements of a prototype that has been fabricated. The return loss for both resonant frequencies are less than -10 dB where 90% of the input signal is transmitted and only 10% of the input signal is reflected back.","PeriodicalId":372048,"journal":{"name":"2013 Conference on Microwave Techniques (COMITE)","volume":"0 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121280310","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}
引用次数: 4
Microwave solid state power amplifier technology 微波固态功率放大器技术
2013 Conference on Microwave Techniques (COMITE) Pub Date : 2013-04-17 DOI: 10.1109/COMITE.2013.6545064
M. Kasal
{"title":"Microwave solid state power amplifier technology","authors":"M. Kasal","doi":"10.1109/COMITE.2013.6545064","DOIUrl":"https://doi.org/10.1109/COMITE.2013.6545064","url":null,"abstract":"This paper is focused on our current research in the field of power amplifier technology for microwaves, especially the X-band. For this purpose we considered different active devices. Unfortunately, we did not manage to obtain super modern GaN transistors (chips) for these frequencies such as TGA2023-05 from TriQuint or module such as TGA-2554-GSG from the same producer. Instead we used internally matched GaAs FETs from Eudyna as well as GaAs module XP-1006A from Mimix. Subsequently we have designed, built and tested three power amplifiers with different active devices and output power of 4, 8 and 20 Watts on 10 GHz. In the paper we would like to introduce design and completion of the amplifiers as well as test results. The highest power we achieved by double stage with 90 degrees 3 dB hybrid couplers at the input and output. The microstrip technique on PTFE substrate has been used. Critical parts of layouts were optimized by using ANSYS modeling software. The dc circuitry needs to be designed according to the proper time sequence and high dc currents. Corresponding cooling system was taken into account.","PeriodicalId":372048,"journal":{"name":"2013 Conference on Microwave Techniques (COMITE)","volume":"14 4 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123695753","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}
引用次数: 1
Stub swapping in automatic three-stub impedance matching systems 自动三根阻抗匹配系统中的短根交换
2013 Conference on Microwave Techniques (COMITE) Pub Date : 2013-04-01 DOI: 10.1109/COMITE.2013.6545069
V. Bilik
{"title":"Stub swapping in automatic three-stub impedance matching systems","authors":"V. Bilik","doi":"10.1109/COMITE.2013.6545069","DOIUrl":"https://doi.org/10.1109/COMITE.2013.6545069","url":null,"abstract":"The paper explains the nature of the stub swapping phenomenon in three-stub automatic impedance matching systems and points out problems it causes in high-power industrial autotuners. A method of quantifying consequences of stub swapping is proposed and illustrated by a simulation example. Two possible ways of suppressing the adverse effects of the stub swapping are suggested.","PeriodicalId":372048,"journal":{"name":"2013 Conference on Microwave Techniques (COMITE)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121052745","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}
引用次数: 1
The use of indirect holographic techniques for microwave imaging 间接全息技术在微波成像中的应用
2013 Conference on Microwave Techniques (COMITE) Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605192
D. Smith, O. Yurduseven, B. Livingstone
{"title":"The use of indirect holographic techniques for microwave imaging","authors":"D. Smith, O. Yurduseven, B. Livingstone","doi":"10.1109/MMW.2010.5605192","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605192","url":null,"abstract":"The use of indirect holographic techniques for antenna testing has been shown to offer a simple, low cost scalar technique for the reconstruction of complex antenna aperture fields. This work extends the use of indirect holography to the imaging of objects. This work provides a brief outline of the basic theory of indirect microwave holography and how it can be used for the reconstruction of scattered complex fields at the measurement plane and how these results can be back propagated to provide images of the scattered fields at the position of the original object. The techniques described have been validated by experimental results on a range of objects including buried objects.","PeriodicalId":372048,"journal":{"name":"2013 Conference on Microwave Techniques (COMITE)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117080182","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}
引用次数: 9
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