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Session: THPQ3:00 PM Thursday, May 27, 2010 Room: 204ABC |
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Session: THPQ | Non-Planar Passive Filters and Multiplexers |
Chair: | Raafat Mansour, University of Waterloo |
Co-Chair: | Kawthar Zaki, University of Maryland |
| | THPQ-1 | Synthesis of Multi-Coupled Resonator Filters with Frequency-Dependent Couplings | 3:00 PM-5:00 PM | W. Meng1, H. Lee1, K. A. Zaki1, A. E. Atia2, 1University of Maryland, College Park, United States, 2Orbital Science Corporation, Dulles, United States |
(1285) | A procedure is presented for the synthesis of multi-coupled resonator filters with frequency-dependent couplings. The two-port parameters of the filter are obtained by circuit analysis with frequency dependent coupling coefficients. A numerical technique, valid for wideband applications, is described to determine the characteristic function based on bandpass prototype. The values of circuit elements are synthesized by equating the admittance parameters obtained from the circuit analysis and filter characteristic function. Synthesis of 7-pole and 4-pole filters with 60% and 54% relative bandwidths respectively are given as examples. | | |
THPQ-2 | Comparison of lossy filters and predistorted filters using novel software | 3:00 PM-5:00 PM | A. Padilla1, J. Mateu3, C. Collado1, C. Ernst2, J. M. Rius1, J. M. Tamayo1, J. M. O'Callaghan1, 1Universitat Politecnica de Catalunya (UPC), Barcelona, Spain, 2ESA, Noordwijk, Netherlands, 3Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Castelldefels, Spain |
(1300) | This paper compares several synthesis alternatives for a 4GHz filter with 36 MHz bandwidth. The alternatives considered are: classical synthesis, various forms of pre-distortion and lossy filter synthesis. Electrical performance of the various alternatives is discussed in detail and a brief description of the topologies is also given. The synthesis of the several alternatives presented in this paper has been performed with a novel software that generates the desired transfer response, obtains the filter transverse coupling matrix and transforms it into other topologies of technological interest. The paper includes a brief description of the software features. | | |
THPQ-3 | Fabrication of PTFE-Filled Waveguide Bandpass Filter Using SR Direct Etching | 3:00 PM-5:00 PM | M. Kishihara1, M. Kato2, H. Ikeuchi3, K. Murai3, Y. Ukita2, Y. Utsumi2, T. Kawai3, I. Ohta3, 1Okayama Prefectural University, Soja, Japan, 2University of Hyogo, Kamigori, Japan, 3University of Hyogo, Himeji, Japan |
(1066) | A metallic waveguide is one of effective media for millimeter- and submillimeter-waves because of the advantage of low-loss. This paper describes trial fabrication of a PTFE-filled waveguide bandpass filter (BPF) with the use of the SR (synchrotron radiation) direct etching process of PTFE, sputter deposition of metal, and electroplating. PTFE is known as a difficult material to process at high precision. However, it has been reported that PTFE microstructures can be fabricated by the direct exposure to SR. In this paper, an iris-coupled waveguide BPF with 5-stage Chebyshev response is designed at Q-band, and the fabrication procedure for the PTFE-filled waveguide BPF is described. The measurement results of the fabricated BPF are shown. | | |
THPQ-4 | Dual Bandpass Ladder-type Filter | 3:00 PM-5:00 PM | J. Verdú, O. Menéndez, P. de Paco, E. Corrales, Universitat Autónoma de Barcelona, Cerdanyola del Vallés, Spain |
(1055) | Filters based on Bulk Acoustic Wave (BAW) resonators present very good performance, small size and compatibility with the standard IC technology processes. However, the traditional configurations of such filters present only one frequency transmission band. In this work, a configuration based on electrically coupled BAW resonators has been developed in order to obtain a dual-band response, where each of these bands can be allocated at a desired frequency. In order to validate the proposed topology, a filter response using measured resonators is shown. | | |
THPQ-5 | X-Band Microwave Power Divider Based on Bow-Tie Shaped Dielectric Resonator High-Order Modes | 3:00 PM-5:00 PM | L. K. Hady Salman1, A. A. Kishk2, D. Kajfez2, 1Université du Québec en Outaouais, Gatineau (Hull), Canada, 2The University of Mississippi, University, United States |
(1019) | The use of high order mode bow-tie shaped dielectric resonator in the design of X-band 6-way power divider is presented. A combination of probe type of excitation integrated with microstrip technology are used to excite an H-polarized resonating mode around 10 GHz. For tapered power distribution, the 23o sectored angle bow-tie shaped dielectric resonator is enclosed within a cylindrical shielded cavity while additional phase compensation is implicitly considered in the feeding network design. Both input matching and in phase tapered power distribution are experimentally maintained within 150 MHz frequency band around the resonance. Measured scattering parameters magnitude and phase of the proposed 7-port structure are carried out to verify the expected simulation results. | | |
THPQ-6 | A Novel Integrated Tx-Rx Diplexer for Dual-band WiMAX System | 3:00 PM-5:00 PM | D. H. Kim2, D. Kim1, J. I. Ryu1, J. C. Kim1, J. C. Park1, C. D. Park2, 1Korea Electronics Technology Institute, Gyeonggi-do, Republic of Korea, 2Myongji University, Gyeonggi-do, Republic of Korea |
(1791) | In this paper, a novel integrated Tx-Rx diplexer for dual-band Worldwide Interoperability for Microwave Access (WiMAX) application is realized by low temperature co-fired ceramic (LTCC) technology. The proposed Tx-Rx diplexer has 5 ports and consists of two lowpass filters, two bandpass filters, and one common matching network, which are fully embedded in the LTCC substrate. This novel structure can be applied for either Tx or Rx path by simply making two ports to be shorted to the ground. The fabricated Tx-Rx diplexer has 9 pattern layers including 3 ground layers and it occupies less than 3.0 mm × 2.5 mm × 0.528 mm. The measured results of the implemented Tx-Rx diplexer are in good agreement with the simulated results. The RF FEM was realized by the proposed Tx-Rx diplexer and 4 PIN diodes at each port except antenna port for shortening to the ground or not. It can be low-loss and low-cost solution by removing MMIC SPDT switch in series connection. | | |
THPQ-7 | High Q SAW Resonator Using upper-electrodes on Grooved-electrodes in LiTaO3 | 3:00 PM-5:00 PM | T. Kimura, M. Kadota, Y. Ida, Murata mfg.,co.ltd., Yasu, Japan |
(1157) | Al-electrodes on 36-48°YX-LiTaO3 substrates have been widely used in surface acoustic wave (SAW) filters and SAW duplexers because of having an optimum electro-mechanical coupling factor, reflection coefficient and good Q-factor. In this paper, authors proposed and constructed a new SAW structure composed of upper Al-electrodes accumulated on lower grooved Cu-electrodes in the LiTaO3 substrate, which has approximately same electro-mechanical coupling factor and reflection coefficient as the Al-electrodes (thickness of 0.1lambda)/36-48°YX-LiTaO3 in order to realize high Q-factor. As the result, the SAW resonator having superior Q-factor was realized compared with that of Al-electrodes(0.1lambda)/42°YX-LiTaO3 substrates. | | |
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