bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quasi‐elliptic slotline bandpass filter using a novel feeding scheme
Authors: Zhou Li‐Heng , Chen Jian‐Xin , Tang Hui , Jin Shi , Bao Zhi‐Hua 
Published: March 2013

AbstractA novel uniplanar slotline bandpass filter with quasi‐elliptic response based on the half‐wavelength split ring resonators with internal coupling is proposed by using the coplanar waveguide (CPW)‐to‐slotline transition which is regarded as a part of the filter.The transition not only fulfils good impedance transformation characteristic without extra impedance matching circuit, but also controls the external quality factor flexibly. An equivalent circuit model is established to investigate the characteristic of the transition. The simulation and measurement results agree well. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1009–1011, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27473
A compact coupled‐line triple‐band bandpass filter with an adjustable third passband and open stubs
Authors: Ko Wen , Her Man‐Long 
Published: March 2013

AbstractThis study proposes a novel structure for designing a simple triple‐band bandpass filter. This filter structure consists of two sets of coupled lines with the same line width plus two sections of open stubs and three transmission line sections of a single line width. The design and fabrication of the overall circuit structure are innovative and simple. The third resonance frequency (f3 of 8.9 GHz) was shifted to a lower frequency (6.5 GHz) by lengthening the two open stubs. The second resonance frequency (f2 of 4.2 GHz) can be adjusted using the transmission line gap size. The first resonance frequency (f1 of 2.4 GHz) can be adjusted using the coupled line length. These filters were simulated using the IE3D full‐wave electromagnetic simulator, and the prototype of the bandpass filter was fabricated and measured. Comparisons of the simulated results and experimental data are presented. The findings show that the simulated results can match actual measured results. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:970–975, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27475
Uplink transmission in the W‐band (75–110 GHz) for hybrid optical fiber‐wireless access networks
Authors: Pang Xiaodan , Deng Lei , Dogadaev Anton , Zhang Xu , Yu Xianbin , Monroy Idelfonso Tafur 
Published: March 2013

AbstractWe report on an experimental, W‐band, uplink for hybrid fiber‐wireless systems which enables high speed communication from the wireless end users to the central server. Overall system performances for an OFDM signal format are discussed in detail. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1033–1036, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27476
Millimeter‐wave INP DHBT power amplifier based on power‐optimized cascode configuration
Authors: Johansen Tom K. , Yan Lei , Dupuy Jean‐Yves , Nodjiadjim Virginie , Konczykowska Agnieszka , Riet Muriel 
Published: March 2013

AbstractThis letter describes the use of a power‐optimized cascode configuration for obtaining maximum output power at millimeter‐wave (mm‐wave) frequencies for a two‐way combined power amplifier (PA). The PA has been fabricated in a high‐speed InP double heterojunction bipolar transistor technology and has a total active emitter area of 68.4 μm2. The experimental results demonstrate a small signal gain of 9.8 dB and saturated output power of more than 18.6 dBm at 72 GHz with a peak power‐added efficiency of 12%. The benefits of the power optimized cascode configuration over the standard cascode configuration at mm‐wave frequencies are confirmed by both simulations and experimental results. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1178–1182, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27477
Single or multi notch bands applied to microstrip excited ultra‐wideband antennas with dielectric resonator antenna case
Authors: Sabouni Abas , Kishk Ahmed 
Published: March 2013

AbstractA new technique is proposed to introduce a narrow notch band to UWB antennas excited by microstrip lines.The technique is applied to an UWB dielectric resonator antenna. A short circuit microstrip stub that is parasitically coupled to the microstrip line is used to create a stopband filter at the desired frequency. Several notch bands can easily be introduced as the length of the stub is related to the notch frequency. The technique is verified experimentally. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1066–1069, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27482
Fully‐integrated standing wave oscillator using composite right/left‐handed LC network
Authors: Jang Sheng‐Lyang , Lee Wei‐Hao , Hsue Ching‐Wen 
Published: March 2013

AbstractThis letter proposes a dual‐band CMOS voltage‐controlled oscillator (VCO) implemented with a distributed composite right/left‐handed (CRLH) LC network.The VCO consists of four units of left‐handed LC resonator stacked in series, the LC resonator in shunt with a pair of cross‐coupled transistors, and a varactor serving as frequency band switching element. The parasitic inductors turn the left‐handed LC network to a CRLH network. In the fundamental mode, the VCO operates at the high‐frequency band. In harmonic mode, the oscillator provides low‐frequency band outputs. The VCO exploits the multiple oscillation mode of the CRLH standing wave oscillator. The proposed VCO has been implemented with the TSMC 0.18 μm 1P6M CMOS technology. It can generate differential signals in the high‐band frequency range of 7.23–7.86 GHz and in the low‐band frequency range of 3.81–5.32 GHz. The die area of the VCO is 0.991 × 0.815 mm2. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:985–988, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27487
Low profile slot antenna with dual band‐notched function for UWB systems
Authors: Ojaroudi Mohammad , Ojaroudi Nasser 
Published: March 2013

AbstractIn this article, a new multi‐resonance slot antenna, with dual band‐notched performance for UWB applications is presented. In the proposed structure, by cutting a rotated C‐shaped slot on top of the ground plane, additional resonances are excited and hence much wider impedance bandwidth can be produced, especially at the middle band. To generate single band notch characteristics, we use a rotated C‐shaped parasitic structure in the ground plane. Also to achieve dual band notch function, we insert a rotated C‐shaped slot at square radiating stub. The measured results reveal that the presented dual band‐notched slot antenna offers a very wide bandwidth with two notched bands covering all the 5.2/5.8 GHz WLAN, 3.5/5.5 GHz WiMAX, and 4 GHz C bands. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:951–954, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27488
Coupling properties of directional couplers based on special waveguides
Authors: Rodríguez‐Esquerre Vitaly Felix , Rodrigues Fernandes de Oliveira Ana Júlia , Silva‐Costa Matheus , Uzêda‐Souza Lucas 
Published: March 2013

AbstractThe coupling characteristics of a novel kind of directional couplers composed by two parallel non‐conventional waveguides are theoretically analyzed in details.The coupling length as a function of the operating wavelength and their optical and geometrical parameters are determined by an efficient frequency domain finite element method. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:949–951, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27489
Design of broadband and high‐efficiency class‐E amplifier with pHEMT using a novel low‐pass microstrip resonator cell
Authors: Hayati Mohsen , Lotfi Ali 
Published: March 2013

AbstractIn this article, a high‐efficient class‐E amplifier design with low voltage and broadband characteristics using a novel Front Coupled Tapered Compact Microstrip Resonant Cell is presented. The proposed micorstrip resonator is used as the harmonic control network in order to suppress higher order harmonics, which obtained the optimized impedance matching for the fundamental and harmonics. The class‐E amplifier is realized from 0.7 to 1.8 GHz, and obtained the power added efficiency of 72.5–77.5%. The maximum value of Power added efficiency (PAE) is 79.7% with 11‐dBm input power at 1.5 GHz. The designed class‐E amplifier using the proposed harmonic control network gained 15.34% increment in PAE, and 25.6% reduction in the circuit size in comparison with the conventional class‐E amplifier. The simulation and measurement results show the validity of the proposed design procedure of the broadband class‐E amplifier using a novel microstrip resonator cell. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1118–1124, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27490
Wake‐up radio architecture utilizing passive down conversion mixing
Authors: Pursula Pekka , Viikari Ville , Saari Juha‐Matti 
Published: March 2013

AbstractThis letter describes a low‐energy wake‐up radio that is based on passive down conversion. The receiver activates when it receives two closely located frequencies that are down converted in the passive mixer. The down converted signal is applied to a low‐frequency wake‐up IC that provides an identification code and wakes up an active radio for further communication. This letter derives an expression for the voltage sensitivity of the mixer and verifies the concept experimentally at 2.45 GHz. The wake‐up radio consumes 6.8 μA at 3 V. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1038–1041, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27493
Semiconductor optical amplifier cavity length impact over data erasing/rewriting
Authors: Ribeiro Napoleão S. , Gallep Cristiano M. , Conforti Evandro 
Published: March 2013

AbstractThe erasing of optical carrier intensity modulation and posterior data rewriting are analyzed for two semiconductor optical amplifiers with different active lengths: 2 mm and 8 mm long.Input signal extinction ratios (ERin) varying from 3.5 dB up to 10 dB are tested for the downstream channel at different bit rates (from 7 Gb/s up to 56 Gb/s), followed by remodulation of the upstream channel at 7 Gb/s. The ultra‐long 8 mm device shows superior performance, working error‐free for bit rates up to 30 Gb/s, with negligible power penalties for moderate ERin. However, for high bit rates (>40 Gb/s) and high input extinction ratios (ERin = 10 dB), the 8 mm device shows error‐floor at BER = 10−6. In comparison, even for moderate ERin at 40 Gb/s, the 2 mm device already presents error‐floors at BER = 10−3. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:998–1001, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27496
An electrically small antenna with integrated DGS filter
Authors: Oukil Sofiane , Kimouche Hocine , Azrar Arab 
Published: March 2013

AbstractIn this letter, a dumbbell‐shaped defected ground structure is proposed to suppress higher order harmonics of an electrically small antenna.A slot loading technique is applied to a well‐known low‐profile antenna, and the area miniaturization of a rectangular microstrip patch antenna by inserting a number of slits parallel to the radiating edges is investigated in relation to the quality factor. The antenna was designed to operate at 0.95 GHz (GSM). Measurement results on a prototype antenna fully demonstrate the performance of the proposed antenna. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:962–966, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27498
Sixty‐GHz on‐chip bandpass filter designed with multiple split ring resonators
Authors: Mat Dayang A. A. , Pokharel Ramesh K. , Sapawi Rohana , Kanaya Haruichi , Yoshida Keiji 
Published: March 2013

AbstractThis article describes the design of on‐chip bandpass filter (BPF) with split ring resonators (SRRs) for millimeter wave application. SRR is one of the metamaterial structures commonly used in designing the passive component and is used to improve the performance of the device. In this design, the BPF is designed with two (2) and five (5) SRRs to analyze the effect of SRRs toward enhancing the performance of the BPF. The SRRs are constructed along the resonator line below the BPF structure on the second lowest metal. In this article, it is shown that the magnetic resonance frequency shifted and leaded to improvement in the insertion loss of BPF as the number of SRRs increased to five. For BPF with 5‐SRRs, the insertion loss is 2.02 dB with return loss better than 30 dB, whereas for BPF with only 2‐SRRs, the insertion loss is 3.29 dB with return loss better than 50 dB. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1182–1185, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27499
A novel low‐voltage tunable capacitor for tunable RF circuit applications
Authors: Lee Young Chul , Lee Baek Ju , Ko Kyung Hyun 
Published: March 2013

AbstractIn this article, a novel architecture of the tunable capacitor is proposed for low‐voltage applications. In order to reduce operation voltage by enhancing fringing electric fields, two finger‐patterned electrodes with zero spacing are vertically separated by employing a multilayer thin‐film dielectric of a para‐/ferro‐/para‐electrics. The proposed tunable capacitor was fabricated on a quartz wafer and its characteristics are analyzed in terms of effective capacitance and tunability with a function of applied voltages, in comparison with the tunable capacitor with the finger‐pattern electrode only on the top of the dielectric. At 8 V and 2 GHz, the proposed tunable capacitor shows a tunability of 18% that is 10.3% higher than that of the compared one. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1152–1155, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27500
The analysis of the effect of flicker noise on orthogonal frequency‐division multiplexing systems
Authors: Woo Sanghyun , Hur Joonhoi , Kim Hyoungsoo 
Published: March 2013

AbstractIn this article, we proposed a new flicker noise simulation methodology within an orthogonal frequency‐division multiplexing (OFDM) PHY layer, which offers accurate analyses of the flicker noise effect.To prove this effect, we examine bit error rate performance with flicker noise by generating raw and channel‐coded data. Experiment results are demonstrated using Reed Solomon channel coding. The proposed simulation methodology offers precise results for deciding flicker noise requirement on RF building blocks for OFDM systems. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1171–1174, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27502
Investigation on a compact ring printed monopole antenna for wireless implantable body area network (WiBAN) applications
Authors: Ramli Nur Hidayah , Kamarudin Muhammad Ramlee , Samsuri Nor Asmawati , Ahyat Ezla Najwa 
Published: March 2013

AbstractThe main objective of this article is to design a compact ring printed monopole antenna for WiBAN applications. The performance of antenna is measured based on gain, return loss, efficiency, radiation pattern, and operating bandwidth. The antenna is implanted into canola oil (for homogeneous material) and beef (for nonhomogeneous material). The final measured result shows satisfactory performance and good agreement with the simulated result. The result presented indicates that the gain of antenna is 0.8 dBi with 49% efficiency when antenna is implanted into canola oil, whereas the gain of antenna is −30 dBi with 0.04% efficiency when antenna is implanted into beef. The radiation patterns of antenna are changed depend on the size and material of human body model. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1053–1058, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27503
9.952‐Gb/s On/Off keying signal transmission over 92‐GHz radio‐over‐fiber system with 40‐km single‐mode fiber and 2‐m air link
Authors: Fang Yuan , Yu Jianjun , Chi Nan , Dong Ze , Chang Geekung K. 
Published: March 2013

AbstractIn this article, we experimentally demonstrated the transmission of 9.952‐Gb/s On/Off Keying (OOK) signal over 40‐km single‐mode fiber (SMF‐28) and 2‐m air link for 92‐GHz RoF system which is near 0.1 THz.We investigate the BER and eye diagram based on different transmission distance and pattern length. The results show that good performance is obtained. The error floor at 20 km and 40 km is 1×10−6 and 1×10−7 respectively when pattern length is 231‐1. However, there is no error floor up to 1×10−10 if pattern length is 27‐1. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1014–1017, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27505
A fully integrated 5.38–5.55 GHz low power cmos hartley voltage‐controlled oscillator
Authors: Huang Jhin‐Fang , Wei Tzyy‐Haur , Chen Kuo‐Lung 
Published: March 2013

AbstractA fully integrated CMOS Hartley voltage controlled oscillator (VCO) applying in 5.6 GHz wireless receiver communication is successfully implemented by TSMC 0.18‐μm CMOS process.To reduce the phase noise, the proposed VCO adopts the tapped‐inductor technique, differential architecture, and symmetrical layout. No more integrated inductors are used for the buffer design to avoid magnetic coupling into the VCO core. At the supply voltage of 1.3 V, measured results achieve a tuning range of 5.38 to 5.55 GHz with a tuned voltage of 0 to 1.3 V, a phase noise of −115.4 dBc/Hz at 1 MHz frequency offset from the carrier frequency of 5.55 GHz and an output power of −6.3 dBm at 5.55 GHz. The power dissipation of the VCO is 3.77 mW and the chip area, including pads, is 0.51 (0.55 × 0.93) mm2. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:978–981, 2013; Microwave Opt Technol Lett 55:978–981, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27506
High isolation series‐shunt photoconductive microwave switch
Authors: Draskovic Drasko , Fernandez Jean Raphael Olivier , Briso‐Rodriguez Cesar 
Published: March 2013

AbstractThis article presents a wide band compact high isolation photoconductive switch, which is based on the series‐shunt switch design with three photoconductive switches made of diced high‐resistivity silicon wafer placed over a microstrip gap and activated by 808‐nm near‐infrared laser diodes. The switch shows an insertion loss of 1.2 dB and an isolation of 44.8 dB at 2 GHz. It is easy to operate and control by light, high‐speed, electromagnetically transparent and it does not require any biasing circuits. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1168–1170, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27507
Ultra‐wideband bandpass filter using simplified dual composite right/left‐handed transmission line structure
Authors: Wang Cheng , Shi Yongrong , Liu Sheng , Tang Wanchun 
Published: March 2013

AbstractA simplified dual composite right/left‐handed (SD‐CRLH) transmission line (TL) structure is proposed and analyzed in this article.The SD‐CRLH TL with only capacitor in series is a left‐handed (LH) highpass filter, while the SD‐CRLH TL with only inductor in series is a right‐handed (RH) lowpass filter. By combining them together, a bandpass filter (BPF) can be realized. As an example, an ultra‐wideband (UWB) BPF is designed and simulated using the SD‐CRLH TL structures, and finally fabricated by the standard printed circuit board process. The measurements show that the proposed UWB BPF has a passband from 3.1 to 10.6 GHz with a group delay variation of less than 0.13 ns, and the insertion loss is less than 1.5 dB over the passband. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1165–1167, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27508
Circularly polarized annular slot antenna with switchable frequency
Authors: Wang Chuen‐Ching , Chen Mu‐Yi , Row Jeen‐Sheen 
Published: March 2013

AbstractA design for frequency reconfigurable annular slot antennas with circular polarization (CP) is described.The slot antenna is excited with a shorted microstrip line through coupling, and one varactor diode placed on the slot is used to generate CP radiation. By controlling the dc bias of the varactor, the CP operating frequency of the slot antenna can be switched between two frequencies with a frequency ratio of about 1.6; moreover, the antenna operating at each CP frequency has a return loss of less than 10 dB and the broadside radiation with a peak gain of higher than 3 dB. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1115–1118, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27509
Small pifa for ZigBee and wlan application
Authors: Tseng Ching‐Fang , Chen Yi‐Wen 
Published: March 2013

AbstractA multiband printed PIFA with an I‐shaped strip and an inverted L‐shaped strip, to be electromagnetic compatible with a nearby conducting box, has been proposed. By introducing a T‐shaped strip, the upper band in the WLAN and HIPERLAN/2 bands is obtained. The proposed antenna is successfully simulated, designed, and measured, showing good matched impedance, omnidirectional radiation pattern, and constant gain. For return loss less than 10 dB, the proposed antenna operates at lower band with a bandwidth of 150 MHz for ZigBee operation, and at upper band with a bandwidth of 800 MHz for WLAN and HIPERLAN/2 applications. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1074–1077, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27511
Dual‐band notched ultra‐wideband antenna by using step‐by‐step design inside conductor‐backed plane
Authors: Esmati Zahra , Moosazadeh Mahdi 
Published: March 2013

AbstractA coplanar waveguide fed (CPW‐fed) ultra‐wideband antenna with dual band‐notched characteristics is proposed. The main features of the proposed antenna are the compact dimensions and band‐notched characteristics that are achieved without modifying the radiator or the CPW‐ground plane. Dual band‐notched characteristics are achieved by M‐shaped strip inside the slotted conductor‐backed plane. Also, wider impedance bandwidth can be achieved with this structure. The measured results show that the proposed antenna operates over the frequency band between 2.6 GHz and 11.7 GHz (127%), defined by VSWR < 2, except two notched bands (3.25–4.32 GHz and 5.02–5.97 GHz), where the VSWR is more than eight, aimed at suppressing any interference from IEEE802.16 WiMAX (3.3–3.6 GHz), C‐band (3.7–4.2 GHz), and IEEE802.11a WLAN (5.15–5.825 GHz). The designed antenna has a small size of 15 × 15 mm2. The antenna has a desirable VSWR level, radiation pattern and gain characteristics for ultra‐wideband frequency band range. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1069–1074, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27512
Role of optical coherence tomography for flexor tendon imaging in a rabbit model
Authors: Tay Benjamin Chia‐Meng , Chow Tzu‐Hao , Ng Beng Koon , He Min , Gan Aaron Wei‐Tat , Chong Alphonsus Khin‐Sze 
Published: March 2013

AbstractOptical coherence tomography (OCT) was used to monitor various flexor tendon states including tendon at rest, normal tendons during loading, tendon microstructural damage post loading, and healing tendons at 0, 3, and 8 weeks time points.Potential uses include assessing microstructural damage, monitoring the quality of suture repair, and tendon healing. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:990–995, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27514