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Session: WE4C3:30 PM Wednesday, May 26, 2010 Room: 207AB |
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Session: WE4C | Novel Technological Realizations of Filters and Multiplexers |
Chair: | Vicente Boria, Technical University of Valencia |
Co-Chair: | Huiwen Yao , Orbital Sciences Corp. |
Abstract: | In this session, novel structure topologies and implementation techniques of filters and multiplexers will be presented. |
| | WE4C-1 | TM Dual-Mode Pseudoelliptic Filters using Nonresonating Modes | 3:30 PM-3:50 PM | S. Bastioli1, C. Tomassoni1, R. Sorrentino1, 1University of Perugia, Perugia, Italy, 2RF Microtech srl, Perugia, Italy |
(1431) | This paper presents a new class of very compact pseudoelliptic dual-mode filters. The basic idea consists of using a pair of resonant TMmn0 modes, while nonresonating modes are exploited so as to produce a direct coupling between the input and the output of the cavity. In this way, a single cavity can provide two reflection and two transmission zeros, thus leading to Nth order dual-mode filters having N transmission zeros. In addition, the proposed configuration yields very compact and geometrically simple structures that can be properly analyzed by a fullwave mode-matching technique, thus dramatically easing the design procedure. The analysis technique has been validated by comparison with commercial EM tools and by the measurement of a manufactured prototype. Several filter examples are proposed showing the design flexibility of the proposed filter class. | | |
WE4C-2 | Coupling Topologies for Realizing Compact Microwave Diplexers with Dual-mode Cavities | 3:50 PM-4:10 PM | H. Ezzeddine1, S. Bila1, S. Verdeyme1, F. Seyfert2, D. Pacaud3, 1XLIM, Limoges, France, 2INRIA, Sophia Antipolis, France, 3Thalès alenia space, Toulouse, France |
(1220) | In this work, two topologies for realizing compact microwave diplexers in dual-mode cavities are presented. The first topology is a classical one, where the common port is coupled to two resonators in separate paths. The second topology is original because of the excitation of a single resonator by the common port. The interest of the second topology is demonstrated on dual-mode cavity diplexers by eliminating spurious cross-polarized modes which appear when using a classical topology. The proposed topologies have been validated by the design of coupled dual-mode cavity diplexers for satellite applications. | | |
WE4C-3 | A Novel Ku-Band Dielectric Resonator Triplexer based on Generalized Multiplexer Theory | 4:10 PM-4:30 PM | F. Loras-Gonzalez1, I. Hidalgo-Carpintero1, S. Sobrino-Arias1, A. García-Lampérez2, M. Salazar-Palma2, 1Thales Alenia Space, Tres Cantos, Spain, 2Universidad Carlos III de Madrid, Leganés, Spain |
(1564) | The synthesis, design, manufacturing and measurement of a Ku Band dielectric resonator triplexer is presented. In contrast to classical multiplexer configurations, where channels are disposed either in manifold or connected by means of bifurcations, this new design avoids extra elements, and only resonators and coupling elements are needed to achieve the required transfer function. Coupling matrices obtained by the optimization algorithm are simplified in order to converge towards feasible topologies. For verification purpose, a three 36 MHz-channel multiplexer has been manufactured. | | |
WE4C-4 | Compact Wide-Band Ridge Waveguide Dual-Band Filters | 4:30 PM-4:50 PM | M. M. Fahmi1, J. A. Ruiz-Cruz2, R. R. Mansour1, K. A. Zaki3, 1University of Waterloo, Waterloo, Canada, 2Universidad Autónoma de Madrid, Madrid, Spain, 3University of Maryland, College Park, College Park, United States |
(1321) | A compact wide-band, dual-band filter realized in air filled metallic ridge waveguides is proposed. Dual-band filters replace doubly multiplexed filters, thus simplifying the system architecture considerably. The filter is realized in a canonical folded structure layout. Coupling sections that realize strong coupling values required for the wide-band characteristics are achieved by means of transversal sections of ridges connecting the main ridge waveguide resonators. The filter is efficiently modeled using rigorous mode matching method. The filter response is further verified using a commercially available Finite Element Method software. In addition a prototype was built and tested for verification. | | |
WE4C-5 | A New Class of 3-D Filter/Antenna Integration with High Quality Factor and High Efficiency | 4:50 PM-5:00 PM | Y. Yusuf, X. Gong, University of Central Florida, Orlando, United States |
(1694) | A novel approach to integrate high-Q 3-D filters with highly efficient slot antennas is presented in this paper. This technique allows for seamless integration of 3-D filters and antennas, which can greatly improve the antenna efficiency and significantly reduce the form factor of RF front ends. A prototype four-pole chebyshev cavity filter integrated with a slot antenna is demonstrated in X band. The center frequency and fractional bandwidth of the filter/antenna system are 9.96 GHz and 6.0%, respectively. Due to the high Q factor (~1,000) of the cavity resonator, the efficiency of the filter/antenna system is measured to be 89%, compared with the measured S21 of -0.5 dB (89%) for an identical filter. This means a near 100% efficient slot antenna is achieved within this integrated filter/antenna system. The measured impedance matching, efficiency, gain, and radiation pattern closely agree with simulation results. | | |
WE4C-6 | Quasi-elliptic 150 GHz Highly Selective LTCC Filter | 5:00 PM-5:10 PM | A. Khalil1, D. Passerieux1, D. Baillargeat1, N. Delhote1, S. Verdeyme1, L. Rigaudeau2, J. Puech2, 1Xlim Laboratory CNRS 6172, Limoges, France, 2French National Space Agency, Toulouse, France |
(1324) | In this paper, a quasi-elliptic filter in the submillimetric wave range is studied and fabricated by the multilayer low temperature co-fired ceramic technology (LTCC). The proposed 4-pole filter, centered at 150 GHz with a 2 GHz band pass, is described and the coupling apertures used to provide the required positive and negative couplings are studied. The measured response is in very good agreement with the predicted behavior with a central frequency of 149.7 GHz (0.2% variation) and a 2.02 GHz band pass. The obtained manufactured filter is compact in size (3.32 mm x 2.36 mm x 0.6 mm), has a high performance with 5.5 dB insertion loss at the central frequency and a transmission attenuation over 20 dB for f0 ± 1.6 GHz. | | |
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