Thu, 24 Jul 2008 15:20:57 BST CiteULike: dcastros bandpass http://www.citeulike.org/user/dcastro/tag/bandpass CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2890645 <i>Antennas and Propagation International Symposium, 2007 IEEE (2007), pp. 4961-4964.</i><br /><br />In this paper, we present a design for a quad-band filter that is based entirely on NRI-TL metamaterial unit cells and exhibits narrow passbands with good selectivity. The multiple passbands of these cells are exploited to provide the overall characteristics of the device. The cells are printed in microstrip, resulting in a low-profile planar device. The device can also be designed as a tri-band or dual-band filter without changing its topology. A quad-band bandpass filter using negative-refractive-index transmission-line (NRI-TL) metamaterials M Studniberg GV Eleftheriades doi:10.1109/APS.2007.4396658 Antennas and Propagation International Symposium, 2007 IEEE (2007), pp. 4961-4964. 2008-06-13T07:01:43-00:00 2007 Antennas and Propagation International Symposium, 2007 IEEE 4961 4964 bandpass filter metamaterial http://www.citeulike.org/user/dcastro/article/2782032 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 53, No. 4. (2005), pp. 1331-1337.</i><br /><br />This paper presents a rigorous design of microstrip bandpass filters with a dual-passband response in parallel-coupled and vertical-stacked configurations. Based on resonance characteristics of a stepped impedance resonator (SIR), the second resonant frequency can be tuned over a wide range by adjusting its structure parameters. Emphasis is placed on filter synthesis for simultaneously matching in-band response and singly loaded Q by using tapped input/output couplings for the two designated passbands. Fractional bandwidth design graphs are used to determine proper geometric parameters of each coupled stage when filter specification is given. Realizable fractional bandwidths of the two passbands for a coupled SIR structure are clearly depicted in fractional bandwidth design graphs. Several experimental filters are fabricated and measured to demonstrate the design. Design of microstrip bandpass filters with a dual-passband response Jen-Tsai Kuo Tsung-Hsun Yeh Chun-Cheng Yeh doi:10.1109/TMTT.2005.845765 Microwave Theory and Techniques, IEEE Transactions on, Vol. 53, No. 4. (2005), pp. 1331-1337. 2008-05-09T23:51:22-00:00 2005 Microwave Theory and Techniques, IEEE Transactions on 53 4 1331 1337 bandpass filter microstrip http://www.citeulike.org/user/dcastro/article/2782031 <i>Microwave and Wireless Components Letters, IEEE, Vol. 16, No. 1. (2006), pp. 46-48.</i><br /><br />Designing wideband bandpass filters (BPF) with parallel-coupled microstrip lines requires tight coupling resulting in close separation between the lines and difficulty of fabrication. Here, it is shown that the etched slots in the ground plane of the parallel coupled lines can significantly increase the coupling. This technique has been extended to realize ultra-wideband BPFs having 3-dB fractional bandwidth greater than 100% and low insertion loss in the passband. Compact wideband bandpass filter MK Mandal S Sanyal doi:10.1109/LMWC.2005.860012 Microwave and Wireless Components Letters, IEEE, Vol. 16, No. 1. (2006), pp. 46-48. 2008-05-09T23:51:19-00:00 2006 Microwave and Wireless Components Letters, IEEE 16 1 46 48 bandpass compact filter wideband http://www.citeulike.org/user/dcastro/article/2782029 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 51, No. 4. (2003), pp. 1241-1246.</i><br /><br />This paper presents a new compact, low insertion-loss, sharp-rejection, and wide-band microstrip bandpass filter. A bandstop filter is introduced that uses a ring resonator with direct-connected orthogonal feed lines. A new bandpass filter based on the bandstop filter uses two tuning stubs to construct a wide-band passband with two sharp stopbands. Without coupling gaps between feed lines and rings, there are no mismatch and radiation losses between them and, therefore, the new filters show low insertion loss. In addition, a dual-mode characteristic is used to increase the stopband bandwidth of the new filters. A simple transmission-line model used to calculate the frequency responses of the filters shows good agreement with measurements. The filter using three cascaded rings has 3-dB fractional bandwidth of 49.3%, an insertion loss of better than 1.6 dB in the passband, a return loss of larger than 13 dB from 4.58 to 7.3 GHz, and two rejections of greater than 40 dB within 2.75-4.02 and 7.73-9.08 GHz. The high-performance, compact-size, and low-cost filter was designed for reducing the interference in full duplex systems in satellite communications. Compact, low insertion-loss, sharp-rejection, and wide-band microstrip bandpass filters Lung-Hwa Hsieh Kai Chang doi:10.1109/TMTT.2003.809643 Microwave Theory and Techniques, IEEE Transactions on, Vol. 51, No. 4. (2003), pp. 1241-1246. 2008-05-09T23:50:43-00:00 2003 Microwave Theory and Techniques, IEEE Transactions on 51 4 1241 1246 bandpass compact filter loss low microstrip http://www.citeulike.org/user/dcastro/article/2782011 <i>Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 4. (2005), pp. 259-261.</i><br /><br />This letter proposes and fabricates a novel dual-band bandpass filter topology. The proposed topology facilitates the split resonating frequencies of coupled resonator pairs in realizing the dual-band response and introduces transmission zeros for improving the stopband attenuation. The semi-lumped prototype enables the integration of the filter in a multilayer circuit for miniaturized implementation. Finally, a design example fabricated with low temperature co-fired ceramic (LTCC) technology is presented for validating the filter configuration. Dual-band bandpass filter using coupled resonator pairs Cheng-Chung Chen doi:10.1109/LMWC.2005.845735 Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 4. (2005), pp. 259-261. 2008-05-09T23:46:53-00:00 2005 Microwave and Wireless Components Letters, IEEE 15 4 259 261 bandpass dual-band filter resonator http://www.citeulike.org/user/dcastro/article/2774608 <i>Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 151, No. 5. (2004), pp. 430-434.</i><br /><br />A novel design of a dual-mode resonator with a double-ring structure for band-pass filter applications is presented in this paper. Conventionally, dual-mode ring resonators are used to obtain band-pass filters. Based on voltage/current couplings, a dual-mode double-ring resonator was recently constructed to improve the responses of the conventional dual-mode ring resonator. In order to obtain a low insertion loss, a wide band and higher rejection, three filters using a dual-mode double-ring resonator are designed for 2.4 GHz ISM band applications. Dual-mode double-ring resonators for microstrip band-pass-filter applications JC Liu PC Lu CH Shie CS Cheng L Yao doi:10.1049/ip-map:20040725 Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 151, No. 5. (2004), pp. 430-434. 2008-05-09T07:26:03-00:00 2004 Microwaves, Antennas and Propagation, IEE Proceedings - 151 5 430 434 bandpass dual filter microstrip mode resonator ring http://www.citeulike.org/user/dcastro/article/2762264 <i>Electronics Letters, Vol. 26, No. 12. (1990), pp. 774-775.</i><br /><br />A new transmission line based theory is developed to study symmetric/asymmetric microstrip ring resonators. The selective splitting of odd modes in certain asymmetric structures can be used to realise bandpass filters. The theory predicts the characteristics of these resonators quite accurately Bandpass characteristics of split-modes in asymmetric ring resonators GK Gopalakrishnan K Chang Electronics Letters, Vol. 26, No. 12. (1990), pp. 774-775. 2008-05-06T18:38:39-00:00 1990 Electronics Letters 26 12 774 775 bandpass resonator ring http://www.citeulike.org/user/dcastro/article/1992079 <i>Electronics Letters, Vol. 40, No. 7. (2004), pp. 433-434.</i><br /><br />A novel defected ground structure (DGS) microstrip resonator is proposed. The proposed DGS resonator has the resonant and anti-resonant characteristic that is very similar to those of a surface acoustic wave resonator or a film bulk acoustic resonator (FBAR). To confirm the validity of the proposed resonator, bandpass filters were designed and implemented using series and parallel resonators. DGS resonator with interdigital capacitor and application to bandpass filter design JS Park JS Yun CS Park Electronics Letters, Vol. 40, No. 7. (2004), pp. 433-434. 2007-11-27T10:19:53-00:00 2004 Electronics Letters 40 7 433 434 bandpass capacitor filter interdigital