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Integration of optimized low pass filters in band pass filter for out of band improvement
- Source :
- IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers, 2001, 49 (12), pp.2376-2383. ⟨10.1109/22.971624⟩
- Publication Year :
- 2001
- Publisher :
- HAL CCSD, 2001.
-
Abstract
- International audience; In this paper, we discuss the control and suppression of spurious resonances commonly encountered with distributed bandpass filters. The basic idea consists of introducinglow-pass structures within bandpass topologies. By adjusting low-pass filter cutoff frequencies, harmonic resonances are attenuated, while maintaining in-band performances. In addition, transmission losses may be reduced as the insertion technique leads to optimum designs in terms of overall size. The approach described here is based upon the combination of classical synthesis techniques and optimization proceduresprovided by conventional computer-aided-design tools. Experimental results are obtained in the case of /spl lambda//sub g//4 shunt-stub filters implemented in classical semilumped low-pass architectures. Then, we investigate alternative integration technologies and techniques to improve the out-of-band rejection over very wide operating bandwidth. To overcome some design limitations, i.e., workable characteristicimpedance value, we propose and validate a multilayer solution. Finally, new low-pass topologies are suggested to improve low-pass filter band rejection.; In this paper, we discuss the control and suppression of spurious resonances commonly encountered with distributed bandpass filters. The basic idea consists of introducinglow-pass structures within bandpass topologies. By adjusting low-pass filter cutoff frequencies, harmonic resonances are attenuated, while maintaining in-band performances. In addition, transmission losses may be reduced as the insertion technique leads to optimum designs in terms of overall size. The approach described here is based upon the combination of classical synthesis techniques and optimization proceduresprovided by conventional computer-aided-design tools. Experimental results are obtained in the case of /spl lambda//sub g//4 shunt-stub filters implemented in classical semilumped low-pass architectures. Then, we investigate alternative integration technologies and techniques to improve the out-of-band rejection over very wide operating bandwidth. To overcome some design limitations, i.e., workable characteristicimpedance value, we propose and validate a multilayer solution. Finally, new low-pass topologies are suggested to improve low-pass filter band rejection.
- Subjects :
- Frequency response
Total harmonic distortion
Engineering
Radiation
business.industry
Low-pass filter
020208 electrical & electronic engineering
Bandwidth (signal processing)
020206 networking & telecommunications
02 engineering and technology
Condensed Matter Physics
Characteristic impedance
[SPI.TRON]Engineering Sciences [physics]/Electronics
Band-pass filter
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
Prototype filter
Electrical and Electronic Engineering
business
Band rejection
Subjects
Details
- Language :
- French
- ISSN :
- 00189480
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers, 2001, 49 (12), pp.2376-2383. ⟨10.1109/22.971624⟩
- Accession number :
- edsair.doi.dedup.....de2916f138db0a3f1decea02a887c31f