Pub Date : 2012-10-01DOI: 10.23919/EUMC.2012.6459125
M. Alexandru, T. Monteil, P. Lorenz, F. Coccetti, H. Aubert
This paper deals with the electromagnetic modeling of oversized and complex electrical structures by means of large scale parallel systems, such as the Grid Computing (GC). As numerical tools, a hybrid Transmission-Line Matrix (TLM) modeling method and modal approach is applied. The non-homogeneous volumes are discretized upon TLM, while the planar structures are modelled with the mode matching approach. The results prove the benefits of the combined GC and hybrid approach to solve electrically large structures.
{"title":"Electromagnetic modeling of complex structures by TLM / modal hybrid approach with efficient parallel computing","authors":"M. Alexandru, T. Monteil, P. Lorenz, F. Coccetti, H. Aubert","doi":"10.23919/EUMC.2012.6459125","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459125","url":null,"abstract":"This paper deals with the electromagnetic modeling of oversized and complex electrical structures by means of large scale parallel systems, such as the Grid Computing (GC). As numerical tools, a hybrid Transmission-Line Matrix (TLM) modeling method and modal approach is applied. The non-homogeneous volumes are discretized upon TLM, while the planar structures are modelled with the mode matching approach. The results prove the benefits of the combined GC and hybrid approach to solve electrically large structures.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128455220","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459376
J. Ni, Jiasheng Hong
A novel compact wideband third-order combline filter using LCP bonded multilayer PCB technology is proposed in this letter. Thanks to the use of the proposed new multilayer technology, it not only can very conveniently realize a very strong coupling to achieve a wideband, but also can achieve more miniaturized size in comparison of the conventional design based on the LCP technology. In addition, two dissimilar quarter-wavelength stepped-impedance resonators with tapped input/output coupling were adopted in the design, which resulted in two transmission zeros in the upper stopband to improve the upper stopband performance. The predicted results are verified by the experiments, which show the fabricated filter has a 3 dB fractional bandwidth of 81% operating at 0.95GHz, 6th harmonic suppression with two transmission zeros and a very compact size of 0.153λg*0.06λg (λg is the guided wavelength at the center frequency).
{"title":"Compact wideband combline filter using LCP bonded multilayer PCB technology","authors":"J. Ni, Jiasheng Hong","doi":"10.23919/EUMC.2012.6459376","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459376","url":null,"abstract":"A novel compact wideband third-order combline filter using LCP bonded multilayer PCB technology is proposed in this letter. Thanks to the use of the proposed new multilayer technology, it not only can very conveniently realize a very strong coupling to achieve a wideband, but also can achieve more miniaturized size in comparison of the conventional design based on the LCP technology. In addition, two dissimilar quarter-wavelength stepped-impedance resonators with tapped input/output coupling were adopted in the design, which resulted in two transmission zeros in the upper stopband to improve the upper stopband performance. The predicted results are verified by the experiments, which show the fabricated filter has a 3 dB fractional bandwidth of 81% operating at 0.95GHz, 6th harmonic suppression with two transmission zeros and a very compact size of 0.153λg*0.06λg (λg is the guided wavelength at the center frequency).","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128677208","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459164
A. Hamidipour, A. Fischer, L. Maurer, A. Stelzer
A 77-GHz rhombic antenna as well as a rhombic antenna array designed for automotive radar applications are presented in 6×6mm2 and 12×8mm2 embedded wafer level ball grid array (eWLB) packages respectively. For the sake of antenna characterization, a 2×2mm2 monolithic microwave integrated circuit (MMIC) including a 77-GHz transceiver and a frequency multiplier is integrated in the package. The frequency multiplier generates the eighteenth harmonic of its input signal and scales a 4.25-GHz input signal to a 76.5-GHz output signal. This enables the antenna beam pattern characterization using a commercial signal source. As the dimensions of a single-element antenna in package (AiP) hardly exceeds the dimension of the MMIC, an AiP typically suffers from an asymmetric beam pattern and limited gain. This paper proposes a highly directional rhombic antenna array solution with more than 10 dBi gain and a symmetric beam pattern.
{"title":"A rhombic antenna array solution in eWLB package for millimeter-wave applications","authors":"A. Hamidipour, A. Fischer, L. Maurer, A. Stelzer","doi":"10.23919/EUMC.2012.6459164","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459164","url":null,"abstract":"A 77-GHz rhombic antenna as well as a rhombic antenna array designed for automotive radar applications are presented in 6×6mm2 and 12×8mm2 embedded wafer level ball grid array (eWLB) packages respectively. For the sake of antenna characterization, a 2×2mm2 monolithic microwave integrated circuit (MMIC) including a 77-GHz transceiver and a frequency multiplier is integrated in the package. The frequency multiplier generates the eighteenth harmonic of its input signal and scales a 4.25-GHz input signal to a 76.5-GHz output signal. This enables the antenna beam pattern characterization using a commercial signal source. As the dimensions of a single-element antenna in package (AiP) hardly exceeds the dimension of the MMIC, an AiP typically suffers from an asymmetric beam pattern and limited gain. This paper proposes a highly directional rhombic antenna array solution with more than 10 dBi gain and a symmetric beam pattern.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124651537","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459115
M. Ozen, C. M. Andersson, T. Eriksson, M. Acar, R. Jos, C. Fager
This paper studies linearity of a 2 GHz, 10 Watt peak output power RF pulse width modulation (RF-PWM) based transmitter. The transmitter incorporates a tunable load network class-E PA as the final output stage. The tunable load network enables dynamic optimization of the class-E along with the duty cycle resulting in high efficiency over a wide range of output power levels. A digital predistiortion based linearization scheme is proposed to enhance the linearity of the transmitter. After linearization, the transmitter exhibits an adjacent channel power ratio (ACPR) of -45 dBc with a 3.84 MHz, 6.7 dB peak-to-average power ratio (PAPR) W-CDMA signal. The average drain efficiency of the GaN HEMT output stage is 67% and the total transmitter efficiency is 54%.
{"title":"Linearization study of a highly efficient CMOS-GaN RF pulse width modulation based transmitter","authors":"M. Ozen, C. M. Andersson, T. Eriksson, M. Acar, R. Jos, C. Fager","doi":"10.23919/EUMC.2012.6459115","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459115","url":null,"abstract":"This paper studies linearity of a 2 GHz, 10 Watt peak output power RF pulse width modulation (RF-PWM) based transmitter. The transmitter incorporates a tunable load network class-E PA as the final output stage. The tunable load network enables dynamic optimization of the class-E along with the duty cycle resulting in high efficiency over a wide range of output power levels. A digital predistiortion based linearization scheme is proposed to enhance the linearity of the transmitter. After linearization, the transmitter exhibits an adjacent channel power ratio (ACPR) of -45 dBc with a 3.84 MHz, 6.7 dB peak-to-average power ratio (PAPR) W-CDMA signal. The average drain efficiency of the GaN HEMT output stage is 67% and the total transmitter efficiency is 54%.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121411683","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459321
Hanseung Lee, T. Itoh
This paper presents a novel tri-band isolation circuit based on a double-Lorentz (DL) transmission line (TL). Since a DL TL has three arbitrary phase constants at three target frequencies, the combination of a DL TL and a band-pass filter can have tri-band isolation characteristic. The quadruplexer, discussed in this paper, consists of four tri-band isolation circuits, and each circuit is isolated from an input at the center frequencies of filters of other channels. As a result, the combined four circuits can satisfy the required characteristics for a quadruplexer. This quadruplexer has two significant advantages. Since modifying filters is not required and there is no limitation to choose filters, commercial filters can be used for a quadruplexer. Also, the quadruplexer can be designed easily with a simple and straightforward design concept. Thus a complex numerical optimization is not necessary. For verifying the design concept, a quadruplexer, which has 942.5 MHz, 1575 MHz, 2140 MHz, and 2450 MHz center frequencies, is designed and fabricated. Filters are commercial Surface Mounted (SMT) type. The measured results show good agreement with the simulation results.
{"title":"Tri-band isolation circuits based on double-Lorentz transmission lines for quadruplexers","authors":"Hanseung Lee, T. Itoh","doi":"10.23919/EUMC.2012.6459321","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459321","url":null,"abstract":"This paper presents a novel tri-band isolation circuit based on a double-Lorentz (DL) transmission line (TL). Since a DL TL has three arbitrary phase constants at three target frequencies, the combination of a DL TL and a band-pass filter can have tri-band isolation characteristic. The quadruplexer, discussed in this paper, consists of four tri-band isolation circuits, and each circuit is isolated from an input at the center frequencies of filters of other channels. As a result, the combined four circuits can satisfy the required characteristics for a quadruplexer. This quadruplexer has two significant advantages. Since modifying filters is not required and there is no limitation to choose filters, commercial filters can be used for a quadruplexer. Also, the quadruplexer can be designed easily with a simple and straightforward design concept. Thus a complex numerical optimization is not necessary. For verifying the design concept, a quadruplexer, which has 942.5 MHz, 1575 MHz, 2140 MHz, and 2450 MHz center frequencies, is designed and fabricated. Filters are commercial Surface Mounted (SMT) type. The measured results show good agreement with the simulation results.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114784884","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459398
Yongzhi Sun, Zhijian Li, Weiqiang Zhu, Zhenhai Ji, Qi Wang
In this paper, we realized a steering antenna using a type of active metamaterial with tunable refractive index in L-band. The controllable left-handed metamaterial is based on periodically printed sub-wavelength metallic resonant patterns with embedded microwave varactors. By controlling the phase properties of the radome, the antenna exhibits continuous scanning capability in a range of ±30° under very simple DC voltage control that does not exceed 10 volts. Simulation results on such structure are given, which agrees well with the theoretical analysis. This antenna has a simple structure, is very easy to configure the beam direction, and has a low cost.
{"title":"New steerable antenna with controllable metamaterial","authors":"Yongzhi Sun, Zhijian Li, Weiqiang Zhu, Zhenhai Ji, Qi Wang","doi":"10.23919/EUMC.2012.6459398","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459398","url":null,"abstract":"In this paper, we realized a steering antenna using a type of active metamaterial with tunable refractive index in L-band. The controllable left-handed metamaterial is based on periodically printed sub-wavelength metallic resonant patterns with embedded microwave varactors. By controlling the phase properties of the radome, the antenna exhibits continuous scanning capability in a range of ±30° under very simple DC voltage control that does not exceed 10 volts. Simulation results on such structure are given, which agrees well with the theoretical analysis. This antenna has a simple structure, is very easy to configure the beam direction, and has a low cost.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126409949","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459404
H. Tae, Hyeong-seok Jang, Soo-Ji Lee, Wang‐Sang Lee, Jong-Won Yu
This paper presents a new 3-mode reconfigurable beam-forming array antenna for mobile WLAN application. The proposed antenna consists of four dipole antennas which are placed on four edges of square ground, and has various beam-patterns by reconfigurable power divider which has 3 operation modes. The experimental results show the proposed antenna has gains of about 2.8 ~ 5 dBi and beam-width of about 50 ~ 120° in each radiation mode.
{"title":"3-Mode reconfigurable beam-forming array antenna for mobile WLAN application","authors":"H. Tae, Hyeong-seok Jang, Soo-Ji Lee, Wang‐Sang Lee, Jong-Won Yu","doi":"10.23919/EUMC.2012.6459404","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459404","url":null,"abstract":"This paper presents a new 3-mode reconfigurable beam-forming array antenna for mobile WLAN application. The proposed antenna consists of four dipole antennas which are placed on four edges of square ground, and has various beam-patterns by reconfigurable power divider which has 3 operation modes. The experimental results show the proposed antenna has gains of about 2.8 ~ 5 dBi and beam-width of about 50 ~ 120° in each radiation mode.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128083072","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459223
N. Shariati, W. Rowe, K. Ghorbani
RF energy harvesting is attracting widespread interest to meet the goal of providing sustainable energy sources for future growth and protection of the environment. In order to demonstrate the feasibility of RF energy harvesting, RF field investigations and analysis of maximum available power in the suburbs of Melbourne, Australia are conducted. Measurement results and analysis indicate that broadcasting system at 540 MHz (with 20 MHz bandwidth) and 100 MHz (88-108 MHz) are great scavenging sources. These frequency ranges provide stable RF signal levels and low propagation loss, produce maximum available power to a range of locations. In addition, broadcasting bands offer a great deal of flexibility to deploy simple and cost-effective implementations, which is of paramount importance for optimal power harvesting systems.
{"title":"RF Field Investigation and Maximum Available Power Analysis for Enhanced RF Energy Scavenging","authors":"N. Shariati, W. Rowe, K. Ghorbani","doi":"10.23919/EUMC.2012.6459223","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459223","url":null,"abstract":"RF energy harvesting is attracting widespread interest to meet the goal of providing sustainable energy sources for future growth and protection of the environment. In order to demonstrate the feasibility of RF energy harvesting, RF field investigations and analysis of maximum available power in the suburbs of Melbourne, Australia are conducted. Measurement results and analysis indicate that broadcasting system at 540 MHz (with 20 MHz bandwidth) and 100 MHz (88-108 MHz) are great scavenging sources. These frequency ranges provide stable RF signal levels and low propagation loss, produce maximum available power to a range of locations. In addition, broadcasting bands offer a great deal of flexibility to deploy simple and cost-effective implementations, which is of paramount importance for optimal power harvesting systems.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125602786","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459140
L. Gupta, D. Peroulis
This paper presents the first RF temperature sensor for condition monitoring of mechanical face seals. The sensor comprises a resonant inductor-capacitor circuit that is inductively coupled to a separate interrogating coil. The resonant circuit is mounted on the stationary face of the mechanical seal. A temperature rise is sensed as a resonant frequency increase, caused by a decrease in the sensor capacitance value. The resonant sensor is implemented using commercially-available components and has a footprint of less than 5.12 mm2. Despite the very close proximity to the steel shaft (0.79 mm) and the stainless steel flange (2 mm), successful interrogation is achieved and the sensor's frequency is increased linearly from 41.1 MHz to 41.6 MHz for a temperature increase from 25°C to 80°C. The measurements are verified by simulating the system using a combination of HFSS-ADS EM-circuit co-simulation model. The uncertainty in the measurements with respect to calibration equation was less than ±5%.
本文介绍了第一台用于机械密封状态监测的射频温度传感器。该传感器包括一个谐振电感-电容电路，该电路电感耦合到一个单独的询问线圈。谐振电路安装在机械密封的固定面上。温升被感知为谐振频率的增加，这是由传感器电容值的减少引起的。该谐振传感器采用商用组件实现，占地面积小于5.12 mm2。尽管非常接近钢轴(0.79毫米)和不锈钢法兰(2毫米)，但成功地实现了探测，传感器的频率从41.1 MHz线性增加到41.6 MHz，温度从25°C增加到80°C。利用HFSS-ADS em -电路联合仿真模型对系统进行了仿真验证。测量值相对于校准方程的不确定度小于±5%。
{"title":"Wireless temperature sensor for condition monitoring of mechanical seals","authors":"L. Gupta, D. Peroulis","doi":"10.23919/EUMC.2012.6459140","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459140","url":null,"abstract":"This paper presents the first RF temperature sensor for condition monitoring of mechanical face seals. The sensor comprises a resonant inductor-capacitor circuit that is inductively coupled to a separate interrogating coil. The resonant circuit is mounted on the stationary face of the mechanical seal. A temperature rise is sensed as a resonant frequency increase, caused by a decrease in the sensor capacitance value. The resonant sensor is implemented using commercially-available components and has a footprint of less than 5.12 mm2. Despite the very close proximity to the steel shaft (0.79 mm) and the stainless steel flange (2 mm), successful interrogation is achieved and the sensor's frequency is increased linearly from 41.1 MHz to 41.6 MHz for a temperature increase from 25°C to 80°C. The measurements are verified by simulating the system using a combination of HFSS-ADS EM-circuit co-simulation model. The uncertainty in the measurements with respect to calibration equation was less than ±5%.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122254104","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459133
S. Sirci, J. D. Martinez, M. Taroncher, V. Boria
The design, fabrication and measurement of continuously tunable filters in single-layer SIW technology is presented in this paper. The filters are based on coupled coaxial resonators embedded into the dielectric and conveniently loaded with GaAs varactors. Firstly, a 2-pole filter demonstrator has been fabricated on a low-cost substrate showing a tunable centre frequency between 2.64 - 2.88 GHz with 1.27 - 3.63 dB insertion losses across the tuning range. Then, the application of this approach to post-fabrication fine tuning of narrow-band multi-pole filters is studied. Thus, a 2.8% FBW 3-pole Chebyshev filter is designed showing a good trade-off between tuning range, additional inband losses and fractional bandwidth variation.
{"title":"Analog tuning of compact varactor-loaded combline filters in substrate integrated waveguide","authors":"S. Sirci, J. D. Martinez, M. Taroncher, V. Boria","doi":"10.23919/EUMC.2012.6459133","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459133","url":null,"abstract":"The design, fabrication and measurement of continuously tunable filters in single-layer SIW technology is presented in this paper. The filters are based on coupled coaxial resonators embedded into the dielectric and conveniently loaded with GaAs varactors. Firstly, a 2-pole filter demonstrator has been fabricated on a low-cost substrate showing a tunable centre frequency between 2.64 - 2.88 GHz with 1.27 - 3.63 dB insertion losses across the tuning range. Then, the application of this approach to post-fabrication fine tuning of narrow-band multi-pole filters is studied. Thus, a 2.8% FBW 3-pole Chebyshev filter is designed showing a good trade-off between tuning range, additional inband losses and fractional bandwidth variation.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911746","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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