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2013 IEEE International RF and Microwave Conference (RFM)最新文献

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Low complexity behavioral model for RF power amplifiers' linearity and efficiency prediction 射频功率放大器线性度和效率预测的低复杂度行为模型
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757267
O. Hammi
{"title":"Low complexity behavioral model for RF power amplifiers' linearity and efficiency prediction","authors":"O. Hammi","doi":"10.1109/RFM.2013.6757267","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757267","url":null,"abstract":"This paper presents a novel power amplifiers' behavioral model that predicts both the linearity as well as the efficiency performances. The proposed model augments current state of the art behavioral models, which only models the output waveform of the device under test, by including an accurate estimation of the efficiency. This efficiency estimation is performed using continuous wave measured data via a power scaling block. The model performances, experimentally assessed using a Doherty power amplifier prototype driven by an LTE signal, demonstrate the accuracy of the proposed structure and its suitability to simultaneously predict power amplifiers' output waveform as well as its power efficiency.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130969026","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
Compact dualband bandpass filter using triple-mode stub loaded resonator 紧凑的双频带通滤波器，采用三模短段加载谐振器
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757211
Ting Sie King, Su Hieng Tiong
{"title":"Compact dualband bandpass filter using triple-mode stub loaded resonator","authors":"Ting Sie King, Su Hieng Tiong","doi":"10.1109/RFM.2013.6757211","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757211","url":null,"abstract":"A compact dual-band bandpass filter (BPF) with controllable bandwidths is designed using two stubs loaded on a half-wavelength resonator. The dual-band performance is realized using two similar resonator structures. The two resonators share a common circular via located at the midpoint of the resonators for smaller circuit size. The nearest unwanted spurious occurs outside the second passband. The filter is designed to have center frequencies at 2.4 GHz and 5.2 GHz. The measurement result shows that both passbands have 3dB bandwidths of 10.9% and 9.1% and insertion losses of 1.2dB and 1.6dB, respectively.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130778952","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: 2
Design of a compact wearable single-arm spiral antenna for satellite communications 用于卫星通信的紧凑型可穿戴单臂螺旋天线的设计
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757275
M. Ur-Rehman, Q. Abbasi, Muhammad Kamran, Xiaodong Yang
{"title":"Design of a compact wearable single-arm spiral antenna for satellite communications","authors":"M. Ur-Rehman, Q. Abbasi, Muhammad Kamran, Xiaodong Yang","doi":"10.1109/RFM.2013.6757275","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757275","url":null,"abstract":"Spiral antennas are a popular choice for satellite communication systems due to their small size, broadband, circular polarisation and high gain. This paper presents a novel design of an Archimedean single-arm spiral antenna fed through a coaxial feed for operation in X and Ku frequency bands covering 8 GHz to 18 GHz frequencies. The antenna has very good impedance matching (better than -10 dB) throughout the frequency range, good right hand circular polarisation (≤3 dB) and offers a maximum peak gain of 9.1 dBi. The radiation characteristics, efficiency, gain and compact size make this antenna suitable for rigid, mobile and airborne terminals. The compact size also makes the proposed antenna good candidate for wearable/poartable wireless communication devices.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114899554","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: 7
Observation of polar patches occurrences during low solar activity 太阳低度活动期间极斑现象的观测
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757262
M. J. Homam, E. M. Warrington, A. Stocker
{"title":"Observation of polar patches occurrences during low solar activity","authors":"M. J. Homam, E. M. Warrington, A. Stocker","doi":"10.1109/RFM.2013.6757262","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757262","url":null,"abstract":"A dual-frequency GPS Ionospheric Scintillation and TEC Monitor (GISTM) receiver, GSV4004B, has been installed at Alert, Canada (82.48° N, 297.75° E, corresponding to 86.95° N, 155.77° E geomagnetic coordinate) since May 2008 to study the ionospheric variability at a high-latitude location. This GISTM receiver is able to measure the Total Electron Content (TEC), and both the amplitude and phase scintillations. This study focuses on the polar patches occurrences observed over Alert for 26-month period from June 2008 until July 2010 where it was mostly during the minimum state of solar activity. It is found that the difference in the occurrences of small patches between months of the same year was about 1-2% (for low intensity patches) and 1-10% (moderate-high intensity). This difference increased to 1-4% (low intensity) and 1-12% (moderate-high intensity) for large patches. UT dependence can be seen where ~80 large and ~300 small patches were identified ~1000 to 2000 UT from June to October in both 2008 and 2009, and they doubled in 2010.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124553724","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
Generic bandwidth scalable behavioral models for RF power amplifiers with memory effects 具有记忆效应的射频功率放大器的通用带宽可扩展行为模型
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757269
A. M. Kedir, A. Kwan, O. Hammi, F. Ghannouchi
{"title":"Generic bandwidth scalable behavioral models for RF power amplifiers with memory effects","authors":"A. M. Kedir, A. Kwan, O. Hammi, F. Ghannouchi","doi":"10.1109/RFM.2013.6757269","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757269","url":null,"abstract":"In this paper, generic bandwidth-scalable behavioral models suitable for power amplifiers exhibiting memory effects are proposed. The models are built around state of the art two-box models, namely the Hammerstein model and the forward twin-nonlinear two-box model, and take advantage of the separation, in these two-box models, between the static and dynamic distortions of the power amplifier. In the proposed bandwidth-scalable two-box models, rather than updating the entire model coefficients when the signal bandwidth changes, the memoryless function is maintained unchanged and only the function modeling the dynamic distortions is updated. Experimental validation carried out on a Doherty amplifier prototype shows that the proposed bandwidth-scalable models are able to achieve the same performance as the conventional models while reducing the number of parameters to be updated following a change in the operating signal bandwidth by up to approximately 75% for the Hammerstein model and 40% for the forward twin-nonlinear two-box model. The developed models are suitable for emerging wireless applications where operating conditions varies rapidly.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122303431","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: 0
Design of Ground Penetrating Radar antenna for buried object detection 探地雷达地物探测天线设计
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757260
M. Karim, M. Malek, M. Jamlos, L. Y. Seng, N. Saudin
{"title":"Design of Ground Penetrating Radar antenna for buried object detection","authors":"M. Karim, M. Malek, M. Jamlos, L. Y. Seng, N. Saudin","doi":"10.1109/RFM.2013.6757260","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757260","url":null,"abstract":"In this paper, the design of planar antenna for use in Ground Penetrating Radar (GPR) for buried object detection is presented. The proposed antenna offers wide operational bandwidth within 500 MHz to 2 GHz frequency band. This property makes the antenna suitable for the application of GPR for buried object detection. Taconic TLY-5 is used as the substrate with dielectric constant of 2.2, tangent loss of 0.0009 and thickness of 1.57 mm. The proposed antenna has simple structure and fully planar, therefore it is easy to integrate with other planar devices. To obtain a directional radiation pattern, the antenna is placed inside an open metallic shielded box. In turn, the gain of the antenna is also increased using this approach. The results in term of reflection coefficient, gain, radiation pattern of the antenna are discussed in this paper.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123154655","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: 12
Evolution and trends of EMI receiver 电磁干扰接收机的发展与趋势
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757285
Mohd Saharul Nizam Abdul Rahim
{"title":"Evolution and trends of EMI receiver","authors":"Mohd Saharul Nizam Abdul Rahim","doi":"10.1109/RFM.2013.6757285","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757285","url":null,"abstract":"Electromagnetic Compatibility (EMC) between electrical and electronic devices is an ever growing discipline. As a result, Radio Noise Meter or EMI Receiver is an indispensable apparatus in quantifying the magnitude of radio interference (disturbance) emitted from these devices. They are also used to determine product compliance to national and international EMC standards. This paper takes a look at the development and evolution of EMI Receiver since the early days of radio interference. This paper also discusses technological development factors and trends for the future of EMI Receivers.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126538031","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: 3
Reproducing power hysteresis with circuit envelope simulation 用电路包络仿真再现功率迟滞
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757264
Yu Zhu, Oleksey Klimashov, D. Bartle
{"title":"Reproducing power hysteresis with circuit envelope simulation","authors":"Yu Zhu, Oleksey Klimashov, D. Bartle","doi":"10.1109/RFM.2013.6757264","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757264","url":null,"abstract":"Power collapse and related hysteresis have been observed for pHEMT switch in its on state when the input power is swept in a certain power range. The abnormal high power behavior can be explained in terms of self-heating and the temperature dependence of the device performance. By incorporating self-heating and temperature dependence into a simplified model, power collapse is reproduced in harmonic balance simulation. A novel simulation scheme is then proposed to simulate the power hysteresis. By representing the power sweep in the measurement with a time-varying power source, the power hysteresis has been successfully reproduced in circuit envelope simulation.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115718535","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: 0
Bandwidth enhancement technique using ground slot for ultra-wideband Coplanar Inverted-F Antenna 基于地槽的超宽带共面倒f天线带宽增强技术
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757276
S. M. Fauzi, A. R. Razali, A. Bakar
{"title":"Bandwidth enhancement technique using ground slot for ultra-wideband Coplanar Inverted-F Antenna","authors":"S. M. Fauzi, A. R. Razali, A. Bakar","doi":"10.1109/RFM.2013.6757276","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757276","url":null,"abstract":"This paper presents an ultra-wideband Coplanar Inverted-F Antenna (CIFA) proposed for WiMAX and WLAN band applications. This paper also introduces an ultra-wideband CIFA based on two techniques which are bandwidth enhancement and radiator miniaturization. As a result, this modification increases the antenna resonant bandwidth to cover almost all UWB range covering the WiMAX and WLAN services. The 10dB return loss bandwidth cover two frequency ranges. The first bandwidth is from 3.6 to 6.4 GHz and the second bandwidth is from 6.9 to 9.5 GHz. From the analysis, the antenna radiation patterns are nearly omnidirectional with low antenna gain. The design of antenna configuration, return loss, far field radiation pattern and gain results are presented and discussed. The performance of this antenna can lead to a promising candidate to be considered by mobile communication designers for application in compact multiband mobile phone and other UWB applications.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130050174","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 impact of mobile speed on vertical handover process between WiFi and WiMAX networks 移动速度对WiFi和WiMAX网络垂直切换过程的影响
2013 IEEE International RF and Microwave Conference (RFM) Pub Date : 2013-12-01 DOI: 10.1109/RFM.2013.6757235
Nasim Hamaydeh, Abedelaziz Khalil, S. Bali, L. Arafeh
{"title":"The impact of mobile speed on vertical handover process between WiFi and WiMAX networks","authors":"Nasim Hamaydeh, Abedelaziz Khalil, S. Bali, L. Arafeh","doi":"10.1109/RFM.2013.6757235","DOIUrl":"https://doi.org/10.1109/RFM.2013.6757235","url":null,"abstract":"In mobile communications, seamless mobility is needed among heterogeneous wireless networks. Service continuity can be maintain by using an accurate vertical handover scheme. IEEE 802.21 standard facilitates handover between heterogeneous networks by presenting media independent handover (MIH) reference models for different link layers technologies. In this paper, we carried out a comprehensive analysis for the key metrics that affects the Quality of Service (QoS) during the vertical handover between WiFi and WiMAX networks. The main objective is to study the effect of the mobile speed on these metrics to measure the performance of vertical handover process through the interoperability between WiFi and WiMAX networks using MIH. The simulation results can help the network designers to implement algorithms such as multi criteria decision-making (MCDM) algorithms in MIH framework to enhance the vertical handover process and consider the mobile speed in the design.","PeriodicalId":187090,"journal":{"name":"2013 IEEE International RF and Microwave Conference (RFM)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133176286","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: 6
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