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Session: THPB9:40 AM Thursday, May 27, 2010 Room: 204ABC |
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Session: THPB | Recent Advancements in Passive Circuitry |
Chair: | Nickolas Kingsley, Auriga Measurement Systems |
Co-Chair: | Peter Russer, Munich University of Technology |
Abstract: | This session presents several new trends in the conception and realization of passive components, either using LTCC and novel CMOS, or employing substrate integrated waveguide, meta-materials, and electromagnetic bandgap structures. Other topics include passive components used for wireless power transmission, modular feed systems, and ultra wide band applications. |
| | THPB-1 | A Modified Wilkinson Divider using Zero-Degree Phase Shifting Composite Right/Left-Handed Transmission Line | 9:40 AM-11:40 AM | S. Kim1, J. Yoon1, Y. Kim1, Y. Yoon2, 1Kumoh National Institute of Technology, Gumi, Republic of Korea, 2Kwandong University, Gangneung-shi, Republic of Korea |
(1186) | This paper proposes a modified Wilkinson divider using a zero-degree phase shifting composite right/left-handed (CRLH) transmission line to obtain good isolation between output ports and to obtain easy fabrication. A zero-degree phase shift CRLH transmission line, which has a total phase shift of zero-degrees, is combined with a right-handed (RH) transmission line with negative phase and a left-handed (LH) transmission line with positive phase. To validate a value of zero-degree on the phase shift CRLH transmission line, compared to a conventional Wilkinson divider, the divider using a zero-degree phase shift line provides comparable input return loss and insertion loss. In addition, the meta-material divider is significantly more compact, occupying only 50% of the size that the conventional divider space. | | |
THPB-2 | High CMRR in Reduced-Coupling Monolithic Baluns | 9:40 AM-11:40 AM | R. C. Frye1, K. Liu2, P. Hlaing3, 1RF Design Consulting, LLC, Piscataway, United States, 2STATS ChipPAC, Tempe, United States, 3STATS ChipPAC, Ltd., Singapore, Singapore |
(1322) | Monolithic technologies (e.g. semiconductor-based passive components) have small dimensions and tight fabrication tolerances. For coupled-resonator baluns this results in superior amplitude and phase balance characteristics, which are directly related to the common-mode rejection. Achieving good CMRR becomes more difficult at higher frequencies because of the effects of capacitive coupling between the primary and secondary coils in the circuit. In this paper a modified physical design is presented that reduces the capacitive coupling and offers superior CMRR. These designs also have reduced inductive coupling, so they have a more narrow-band response. Measured performance characteristics of a practical example of one of these baluns are presented. | | |
THPB-3 | A Novel TE10-TE20 Mode Transducer Utilizing Vertical Cross-Excitation | 9:40 AM-11:40 AM | H. Ikeuchi1, S. Matsumoto2, T. Kawai1, I. Ohta1, 1University of Hyogo, Himeji, Japan, 2Furuno Electric Co.,Ltd., Nishinomiya, Japan |
(1364) | The present paper suggests a new type of TE10-TE20 mode transducer vertically excited in a way of crossing the electric fields of an over-moded waveguide (OMWG) and a single-mode one (SMWG). By optimizing a matching element the mode-conversion efficiency more than 99% is obtained over the fractional bandwidth of about 17%. The reason why such a good performance is obtained is because the present mode transducer is free from undesired mode excitation in principle. The validity of the design concept also confirmed experimentally. Moreover, an elimination technique of unwanted resonant response is successfully demonstrated. | | |
THPB-4 | Wireless Power Transmission Based on Directional Coupler or Directional Filter | 9:40 AM-11:40 AM | I. Awai, K. Hori, S. Yakuno, K. Namikoshi, Ryukoku University, Otsu, Japan |
(1388) | A new concept for mobile wireless power transmission is proposed based on a microwave directional coupler and directional filter. To cope with the uniform power transmission line required in the system, the circuit configuration should be changed keeping matching with the external circuits. Analysis and experiment is carried out to show the power acquisition from a uniform line with the coupling coefficient from -10dB to 0dB by making good use of the directional coupler scheme or directional filter scheme. | | |
THPB-5 | A New UWB Coupled Transmission Line Power Divider | 9:40 AM-11:40 AM | R. Kravchenko1, M. Stadler1, E. Leitgeb2, 1EPCOS, Deutschlandsberg, Austria, 2TU Graz, Graz, Austria |
(1490) | A novel ultra wideband (UWB) power divider is proposed in this paper. A design of the power divider is based on coupled transmission lines and it has been implemented using low temperature cofired ceramic (LTCC) technology. The power divider provides a function over the whole UWB bandwidth (3.1 – 10.6GHz). In contrary to commonly used coupled line splitters, the design doesn’t requires infinite increasing of the even-mode coupled line impedance in order to achieve bandwidth as wider as possible. Optimal values of the even- odd-mode impedances are required for the ultra wideband function that results in optimized coupling coefficient and contributes to smaller size of the component. A test structure of the power divider has been produced and evaluated. Measurements show low insertion loss of less than 1dB with a good matching over the simulated bandwidth. | | |
THPB-6 | Dual-Band Hybrid Balun Structure using Transmission-lines and Lumped Component Resonators | 9:40 AM-11:40 AM | P. Aflaki1, R. Negra2, F. Ghannouchi1, 1University of Calgary, Calgary, Canada, 2RWTH Aachen University, Aachen, Germany |
(1666) | This paper presents a new dual-band rat-race balun structure for microwave circuit designs and applications. The methodology of designing the dual-band rat-race calls for conventionally designing it at the higher frequency (f1) using distributed components and augmenting the resulting design by adding resonators connected to open stubs to achieve as well as good performance at the lower frequency (f2). This leads to a size reduction as the main body of the balun is designed for the smaller wavelength. A dual-band rat-race balun has been designed and fabricated at 2.14 and 3.6 GHz. Measurement and momentum simulation results found to be in good agreement. | | |
THPB-7 | A Novel Compact Three-Dimensional CMOS Branch-Line Coupler using the Meandering ECPW, TFMS, and Buried Micro Coaxial Technologies at 60 GHz | 9:40 AM-11:40 AM | K. Hettak1, R. Amaya2, G. Morin3, 1Communications Research Center, Ottawa, Canada, 2communication Research center, Ottawa, Canada, 3DRDC, Ottawa, Canada |
(1678) | This paper proposes a new approach for realizing a compact 3-D 90° hybrid coupler incorporating compact meandered elevated coplanar waveguides (ECPW), thin-film microstrip (TFMS) transmission lines, and micro coaxial shunt stub loading. The design technique has been successfully demonstrated using a multi-layer 90nm CMOS process. The proposed coupler takes advantage of the multi-level metallization processes offered in CMOS technology. The intrinsic area of the fabricated 3-D hybrid coupler is significantly reduced with a size reduction of 81% in circuit area at 60 GHz as compared to that of a conventional hybrid coupler using the ECPW/TFMS configuration. Simulated and experimental results are presented in support of the novel miniature coupler | | |
THPB-8 | A Novel Volumetric Folded Ring Resonator Metamaterial Structure | 9:40 AM-11:40 AM | N. R. Labadie, S. K. Sharma, San Diego State University, San Diego, United States |
(1680) | A novel folded ring resonator (FRR) is shown to deliver an equivalent bandgap response to a planar square closed ring resonator (CRR). In addition to being significantly more compact in two dimensions, the folded ring resonator is polarization independent. The bulk behavior of a cubic lattice of the novel structure demonstrates backward mode behavior centered at 4.5 GHz with a bandwidth of 12.2% as derived from the dispersion curve. Parametric sweeps of the critical dimensions are presented showing the tunability of the structure. The field nature of the backward mode is explained in terms of the realized negative permittivity and permeability. For finite thickness slabs of the novel substrate, the material parameters and phase are shown to indicate the presence of a backward mode in agreement with the bulk response. | | |
THPB-9 | Design and Characterization of Periodically-Loaded Substrate Integrated Waveguide Phase Shifters | 9:40 AM-11:40 AM | A. Suntives, K. Payandehjoo, R. Abhari, McGill University, Montreal, Canada |
(1737) | A substrate integrated waveguide (SIW) phase shifter with tuning capability is introduced in this paper. Transverse slots are placed on the top plane of an SIW and loaded with capacitive elements. This structure has a periodic topology thus exhibits electromagnetic bandgap (EBG) properties. It is shown that the slots can be properly designed to avoid radiation loss. As well, the relationships between transmission characteristics and design parameters such as capacitor value and slot size are investigated through parametric simulations. Several phase shifter prototypes with 6 unit cells were fabricated and evaluated using S-parameter measurements. A very good agreement is observed between measurements and simulations. It is demonstrated that the proposed phase shifter provides the phase tuning range of 230.1 degrees at 15 GHz and yields a +/- 5-degree phase bandwidth of 32.5% for the case of 0.3-pF loading capacitor. | | |
THPB-10 | Compact Wilkinson Power Divider with Simultaneous Bandpass Response and Harmonic Suppression | 9:40 AM-11:40 AM | P. Cheong, K. Lai, K. Tam, University of Macau, Macau, Macau |
(1820) | In this paper, an integrated power divider/ bandpass filter component is proposed for simultaneous size reduction and harmonic suppression. A stepped impedance interdigital coupling element is used to replace the conventional quarter wavelength impedance transforming section of the Wilkinson power divider, yielding not only selective bandpass response but also good power splitting performance. From the experimental results, the insertion loss of a 2.4 GHz prototype is kept as low as 3.3 dB in the passband, and the isolation is 20.6 dB. The first spurious passband is recorded at 3.4f0. These indexes show the significance of the proposed integrated component. | | |
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