bluuebunny/crossref_metadata_2025_split huggingface dataset:
High‐finesse microlens optical fiber Fabry‐Perot filters
Authors: Jiang Yi , Tang Caijie 
Published: June 2008

AbstractA novel optical fiber Fabry‐Perot filter (FFPF) based on two microlenses is proposed and demonstrated. The microlens is produced by forming a droplet with UV‐curing adhesive on the mirror of the filter. An FFPF with a finesse of 65 was obtained in the experiment. The advantages of the high‐finesse FFPF are the low cost and ease of construction. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2386–2389, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23679
Compact microstrip bandpass filter using two‐layer aperture‐coupled resonator‐embedded structure
Authors: Wang Yunxiu , Wang Bing‐Zhong , Wang Jianpeng , Xiao Shaoqiu 
Published: June 2008

AbstractA two‐layer microstrip bandpass filter using aperture‐coupled topology is proposed in this article. The filter is composed of two uniform impedance resonators and two stepped impedance resonators located on two stacked microstrip layers, and the couplings between the resonators on the upper layer and those on the lower one are obtained by using three coupling apertures etched on a common ground plane placed between the two layers. With this two‐layer configuration, the proposed filter becomes very compact. To demonstrate the design, a four‐order bandpass filter is designed at 2.33 GHz. Compared with a single layer structure filter, a significant size reduction of about 50% is obtained. Furthermore, a stop‐band is extended to 8 GHz (3.43 f0) with a rejection better than −20 dB. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2357–2360, 2008; Published online in Wiley InerScience (www.interscience.wiley.com). DOI 10.1002/mop.23680
An alternate set of basis functions for the electromagnetic solution of arbitrarily shaped, three‐dimensional, closed, conducting bodies using method of moments
Authors: Mackenzie Anne I. , Baginski Michael E. , Rao Sadasiva M. 
Published: June 2008

AbstractIn this work, we present an alternate set of basis functions, each defined over a pair of planar triangular patches, for the method of moments solution of electromagnetic scattering and radiation problems associated with arbitrarily shaped, closed, conducting surfaces. The present basis functions are point‐wise orthogonal to the pulse basis functions previously defined. The prime motivation to develop the present set of basis functions is to utilize them for the electromagnetic solution of dielectric bodies using a surface integral equation formulation which involves both electric and magnetic currents. However, in the present work, only the conducting body solution is presented and compared with other data. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2354–2357, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23681
Improved technique used in high performance balanced vector modulators design
Authors: Hou Yang , Li Lingyun , Sun Xiaowei 
Published: June 2008

AbstractThis article describes and analyses an improved technique for the realization of balanced vector modulators. The analysis focuses on the effect of the Lange coupler characteristic impedance and the pHEMT total gate width on the modulator minimum insertion loss. A method of adjusting these parameters to optimum values is used to reduce the loss and achieve a more symmetrical constellation. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2325–2328, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23682
A differential HBT power cell and its model
Authors: Lee Dong Ho , Chen Yue , Lee Kyung‐Ai , Hong Songcheol 
Published: June 2008

AbstractA differential heterojunction bipolar transistor (HBT) power cell has been designed and modeled with additional model extraction patterns. The differential power cell, which is composed of a unit differential amplifier with a common emitter ballast resistor, has no gain degradation by the ballast resistors and has been implemented in InGaP/GaAs HBT technology. DC and AC characteristics are extracted from a half circuit of the differential power cell and thermal characteristics are extracted from a common‐mode circuit of that. Using the extracted model, a 5‐GHz differential power amplifier has been designed and fabricated with on‐chip output networks. The 5‐GHz differential power amplifier delivers 26 dBm ofP1dBwith 30% collector efficiency. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2262–2268, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23684
Design a PIFA with fold‐type ground plane for dual frequency mobile phone
Authors: Jiang Bo‐Tao , Mao Jun‐Fa , Jiang Liang 
Published: June 2008

AbstractThis article discusses results from a comprehensive investigation into the performance of two ground planes with various angle and ratio. Results from numerical simulations and measurements on prototype hardware are presented to show the influence of angle and ratio on resonant frequency, bandwidth, return loss of centre frequency, gain, and radiation patterns. A fold‐type mobile phone was designed, and TRP and TIS of it satisfy the CTIA certification. Present data are very useful in the design of a fold‐type mobile phone. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2258–2262, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23685
On‐chip dipoles in CMOS for wireless interconnect application
Authors: Jiang Liang , Yin Wen‐Yan , Mao Junfa 
Published: June 2008

AbstractTwo new on‐chip dipoles in standard 0.18‐μm CMOS are presented. The dipoles show higher inter‐chip transmission gain than traditional on‐chip meander dipole and smaller coverage than traditional on‐chip linear dipole. Comparison between the simulated and measured S11 of the on‐chip dipoles indicates that the existence of metal, poly and diffusion dummies decrease the resonances. Transmission gains with different inter‐chip distances and under different experiment conditions are calculated from measured S parameters, respectively. The design is helpful for the performance improvement of on‐chip dipoles and the farther CMOS integration of on‐chip antennas for wireless interconnect applications. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2446–2449, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23686
Low‐cost low‐sidelobe microstrip array with circular polarization
Authors: Tang Xiao‐Rong , Zhong Shun‐Shi , Sun Zhu , Liu Jian‐Jun 
Published: June 2008

AbstractA low‐cost low‐sidelobe microstrip array antenna with a symmetric main beam of circular polarization (CP) is introduced. The array antenna has a coplanar feed network to excite a Chebyshev current distribution in the horizontal direction and a uniform distribution in the vertical direction of a 4 × 3 elements array. The CP operation is realized by using the corner‐fed quasi‐square patch elements. Measured results show that the array has a sidelobe level (SLL) of −21 dB in the horizontal plane, the half‐power beamwidth of 27° for two main planes both and the axial ratio of below 3 dB within the main beam. Its return loss is less than −10dB for the impedance bandwidth of 40 MHz. Its measured gain reaches 13.9 dB at 2.55 GHz. It is a low‐cost low‐sidelobe design with thin profile, simple structure, CP operation, and symmetric main beam, suited for the radio frequency identification (RFID) readers and other wireless systems. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2384–2386, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23687
A novel HTS filter with improved out‐of‐band rejection by introducing a quarter‐wavelength spiral stub
Authors: Piao Yunlong , Zhang Xiaoping , Guo Xubo , Jin Shichao , Cao Bisong , Peng Huili , Lu Xinxiang , Gao Baoxin 
Published: June 2008

AbstractA novel high temperature superconducting (HTS) filter with split‐end stepped impedance resonators (SIR) is developed on MgO substrate. Spiral feedlines are used to meet the requirement of the external quality factor. A quarter‐wavelength (λ/4) spiral stub is introduced at the input feedline to provide additional transmission zeros at the high frequency end, which can improve both the out‐of‐band rejection and band‐edge steepness. The measured results at 70 K are in good agreement with the simulated ones. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2455–2457, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23688
Spherical representation of omnipotent Smith chart
Authors: Wu Yongle , Huang Haiyu , Liu Yuanan , Gao Zehua 
Published: June 2008

AbstractIn this article, A spherical representation of omnipotent Smith chart (OSC) for lossy nonreciprocal transmission lines (LNTLs) is presented. Such representation is an extension of OSC to deeply understand the general transmission lines with not only positive parameters but also negative ones. The spherical OSC has great potential in the application of RF systems which involve active devices. The mathematical expressions and the three‐dimensional (3D) graphics of the representation are showed in detail. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2452–2455, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23689
Low‐profile platform‐tolerant RFID tag with artificial magnetic conductor (AMC)
Authors: Kim Dongho , Yeo Junho , Ick Choi Jae 
Published: June 2008

AbstractA novel low‐profile (≈0.01λ) platform‐tolerant passive RFID tag incorporated with artificial magnetic conductor (AMC) is proposed in this letter. It consists of a modified dipole antenna combined with an AMC ground plane and a tag chip attached on the feeding point of the antenna. The proposed tag shows long and stable read range from 4 to 6 m with a realized gain ranging from 4.1 to 5.3 dB for different platform materials such as metals and lossy liquids. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2292–2294, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23690
Compact triple‐band bandpass filter using pseudointerdigital trisection stepped impedance resonators
Authors: Chen Fu‐Chang , Chu Qing‐Xin 
Published: June 2008

AbstractThis letter presents a compact triple‐band bandpass filter using pseudointerdigital trisection stepped impedance resonators (SIR). By tuning the impedance ratio and physical length of trisection SIRs, the BPF has good triple‐band performances at 1.57‐/2.45‐/5.25‐GHz and high isolation among the three passbands. It is shown that the triple‐band bandpass filter has a small size in comparison of previous works. Good agreement is shown between the simulated and measured results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2462–2465, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23691
A novel microstrip low‐pass filter design method using square‐shaped defected ground structure
Authors: Vágner Petr , Kasal Miroslav 
Published: June 2008

AbstractThis article deals with novel microstrip low‐pass filter (LPF) design method using defected ground structure (DGS). The DGS allows significant length reduction of inductive microstrip lines, thus overall filter dimensions are reduced. Chebyshev prototype filter design is described and conversion from lumped network structure to microstrip structure with DGS resonators is shown. For given passband ripple and cutoff frequency, a 7th order filter design is described. S‐parameters of proposed LPF are simulated and theoretical results are compared with measurement. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2458–2462, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23692
A CMOS opto‐electronic single chip using the hybrid scheme for optical receivers
Authors: Huang Jian‐Ming , Wang Chua‐Chin , Chiu Yi‐Jen 
Published: June 2008

AbstractAn opto‐electronic integrated circuit based on the hybrid scheme for an optical receiver front‐end is presented in this article. The proposed integrated circuit adopts the CMOS technology as the vehicle to integrate the InP‐based waveguide photodetector into the transimpedance amplifier (TIA) circuit. A regulated cascade structure is used to reduce the input impedance of the TIA. Hence, the proposed integrated circuit can achieve a very high bandwidth provided that the parasitic capacitance of the photodetector is up to 1 pF. The 3‐dB bandwidth and the transimpedance gain of the proposed circuit are 1 GHz and 64.5 dBΩ, respectively. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2430–2434, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23693
Experimental studies on microwave ablation in vitro animal tissues with microwave percutaneous coagulator
Authors: Che Wenquan , Chang Yumei , Yang Lisheng , Yang Lijiang , Chen Guoqiang 
Published: June 2008

AbstractThe principle and geometry of the microwave percutaneous coagulator system are investigated in this article; the main parts of the system are briefly introduced. A large number of experiments on porcine liver are carried out, and the temperature distribution within the liver are measured and illustrated, for cases of different injected microwave power and ablation time. In addition, the ablation areas in cases of different input microwave powers are also measured. All these results indicate the potential validity of this system on medical treatment of liver cancer of human body. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2426–2430, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23694
SOA‐based polarity‐preserving all‐optical wavelength conversion at 80Gbit/s: Wide conversion range, well dynamic characteristics and polarization insensitive
Authors: Yan Shuangyi , Zhang Jian‐Guo , Zhao Wei 
Published: June 2008

AbstractThis letter presents the effective design of a tunable 80 Gbit/s wavelength converter with a simple configuration consisting of a single semiconductor optical amplifier (SOA) and an optical bandpass filter (OBPF). Based on both cross‐gain and cross‐phase modulation in SOA, the polarity‐preserved, ultrafast wavelength conversion is achieved by appropriately filtering the blue‐chirped spectral component of a probe light. Moreover, the experiments are carried out to investigate into the wavelength tunability and the maximum tuning range of the designed wavelength converter. Our results show that a wide wavelength conversion range of nearly 35 nm is achieved with 21‐nm downconversion and 14‐nm upconversion, which is substantially limited by the operation wavelength ranges of a tunable OBPF and a tunable continuous‐wave laser in our experiment. We also exploited the dynamics characteristics of the wavelength converter with variable input powers and different injection current of SOA. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2392–2399, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23695
Balanced circulator structure with enhanced isolation characteristics
Authors: Lim Won‐Gyu , Yu Jong‐Won 
Published: June 2008

AbstractIn this article, we proposed a new balanced circulator structure having enhanced isolation characteristics between transmitter and receiver. Also, we show that the balanced circulator structure has little performance degradation for the varying load impedance. The balanced circulator consists of two branch‐line couplers and two circulators. The validity of the balanced circulator is confirmed by comparisons with the simulated and measured results obtained from the single circulator. The fabricated balanced circulator has about 50 dB isolation for the matched load impedance and above 30 dB isolation for the mismatched load impedance at 910 MHz, the center frequency of UHF RFID. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2389–2391, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23696
A 2‐mW low‐power 0.13‐μm CMOS VCO and LO generator for GPS applications
Authors: Kim Young‐Jin , Beak Dong‐Hyun 
Published: June 2008

AbstractA low‐power GPS local generator using a 0.13‐μm CMOS process is presented. The complementary CMOS VCO, whose power consumption is about 0.6 mW, achieves the wide tuning range of 700 MHz and phase noise of −116 to −120 dBc/Hz at 1‐MHz frequency offset. To lower VCO gain and increase tunable control voltage range, aKVCOlinearizer is introduced by adopting multiple reference bias configurations. Using low‐power inverting amplifier, the power of local generator is minimized to below 2 mW in spite of providing 800 mVppswing voltage to passive mixer from 1.2 V supply. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2362–2365, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23697
On widening the angular existence domain for Dyakonov surface waves using the Pockels effect
Authors: Nelatury Sudarshan R. , Polo John A. , Lakhtakia Akhlesh 
Published: June 2008

AbstractThe propagation of Dyakonov surface waves (DSWs) at the planar interface between an isotropic material and a linear electro‐optic birefringent material can be dynamically controlled using the Pockels effect. The range of directions for DSW propagation has been previously found to be rather narrow. By careful choice of various parameters, this range of directions can be increased by more than an order of magnitude. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2360–2362, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23698
A fuzzy logic based device for the determination of temperature dependence of EDFAs
Authors: Goktas H. Haldun , Yucel Murat 
Published: June 2008

AbstractIn this study, a fuzzy logic (FL)‐based device is designed, constructed, and applied to a C band (1530–1565 nm) erbium‐doped fiber amplifier to obtain maximum signal gain and appropriate erbium‐doped fiber length for the temperature range between −20 and +60°C. The fuzzy rules—which are embedded into the circuit—are compiled using the input variables which are, namely, the signal wavelength and the temperature, whereas the output parameters are the signal gain and the appropriate fiber length providing the maximum signal gain. The FL‐based device provides the predictions for the fiber length providing the maximum signal gain against the input signal wavelength, and the temperatures within the accuracy level of 95–99%. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2331–2334, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23699
Highly efficient class‐F GaN HEMT Doherty amplifier for WCDMA applications
Authors: Lee Yong‐Sub , Lee Mun‐Woo , Jeong Yoon‐Ha 
Published: June 2008

AbstractThis article presents a high‐efficiency GaN HEMT class‐F Doherty amplifier for 2.14‐GHz WCDMA applications. From the measured results, the proposed amplifier shows the PAE and drain efficiency of 56.3 and 60.1% at 39.5 dBm (6‐dB back‐off power from Psat) for a single tone. For a one‐carrier WCDMA signal, the CFDA shows the PAE of 44.9% with an ACLR of −22.1 dBc (±2.5 MHz offset) at 36.5 dBm, while an ACLR of −35.4 dBc with the PAE of 39.7% is achieved for the CEDA after linearity optimization. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2328–2331, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23700
Broadband parallel‐coupled quadrature coupler with floating‐potential ground plane conductor
Authors: Abbosh A. M. 
Published: June 2008

AbstractThe design of a parallel‐coupled directional coupler, which has a broadband performance, is presented. A floating‐potential ground plane conductor is used underneath the coupled region to relax the requirement for a narrow slot between the coupled lines and to improve the isolation and return loss performance of the device. The simulated and measured results show that the designed coupler exhibits a coupling of 3 ± 1 dB across the band 4–10.2 GHz, when the spacing between the coupled lines is 0.13 mm, which is easy to manufacture. This broadband coupling is accompanied by an isolation and return loss which are better than 15 dB across the band 3.1–10.6 GHz. The simulated and measured results show good phase stability and flat group delay across the ultra wideband. The designed device has a compact size with a dimension of 30 mm × 20 mm. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2304–2307, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.23701
Regulatory changes of apoptotic factors in the bovine corpus luteum after induced luteolysis
Authors: Kliem H. , Berisha B. , Meyer H.H.D. , Schams D. 
Published: June 2008

AbstractThe corpus luteum (CL) offers the opportunity to study not only proliferative, but also regressive processes. During luteolysis of the CL a sudden death of luteal and endothelial cells seems to be involved (apoptosis). The aim of this study was to examen the mRNA expression of factors known to be involved in apoptotic processes: monocyte chemoattractant protein‐1 (MCP‐1), factors of the extrinsic and intrinsic apoptotic pathways, caspase3, ‐6, ‐7 and interferone gamma (IFNγ). Luteolysis was induced by injection of 500 µg Cloprostenol during mid‐luteal phase. The CLs were collected at 0.5, 2, 4, 12, 24, 48, and 64 hr after PGF2α‐injection. Control CLs (Days 8–12) were collected at the slaugtherhouse. Real‐time RT‐PCR determined the mRNA expressions. Western blot analysis of poly(ADP‐ribose) polymerase (PARP‐1) and IFNγ as well as protein measurement of tumor necrosis factor α (TNFα) by EIA were performed. The mRNA levels of MCP‐1, IFNγ and most factors of the extrinsic pathway were significantly increased between 0.5 and 2 hr. The factors of the intrinsic pathway were mostly later up‐regulated at 24–48 hr after PGF2α. Caspase6 and 3 revealed a significant increase from 2 and 12 hr, respectively, whereas caspase7 was significantly up‐regulated after 24 hr. The protein level of TNFα increased significantly to a maximum level at 12 hr. The Western blot revealed an increasing level of an 89 kDa fragment of PARP‐1 from 12 to 24 hr, which is specific for apoptosis. We assume that the extrinsic pathway is more important for the onset of luteolysis, because of its earlier and higher increase during induced luteolysis. Mol. Reprod. Dev. 76: 220–230, 2009. © 2008 Wiley‐Liss, Inc.
Neurophysiology in neurourology
Authors: Roberts Margaret M. 
Published: June 2008

AbstractThe bladder has only two essential functions. It stores and periodically empties liquid waste. Yet it is unique as a visceral organ, allowing integrated volitional and autonomous control of continence and voiding. Normal function tests the integrity of the nervous system at all levels, extending from the neuroepithelium of the bladder wall to the frontal cortex of the brain. Thus, dysfunction is common with impairment of either the central or peripheral nervous system. This monograph presents an overview of the neural control of the bladder as it is currently understood. A description of pertinent peripheral anatomy and neuroanatomy is provided, followed by an explanation of common neurophysiological tests of the lower urinary tract and associated structures, including both urodynamic and electrodiagnostic approaches. Clinical applications are included to illustrate the impact of nervous system dysfunction on the bladder and to provide indications for testing. © 2008 Wiley Periodicals, Inc. Muscle Nerve 38: 815–836, 2008