A Direct Preconditioner for Coupling Matrix Reconfiguration of Bandpass Filters With Irregular Couplings Using Continuation Method

Microwave Bandpass Filters Using Couplings With Defected Ground Structures

In this paper some novel types of microwave bandpass filters using defected ground structures are investigated. In the microstrip technology the use of defected ground structures (DGS) allows designs of filters with tight couplings, without the necessity of using very narrow coupling gaps. In multilayer filters DGS can be used as coupling elements between resonators, allowing very compact filte...

Electrically coupled MEMS bandpass filters Part I: With coupling element

This paper, the first of the two parts, presents coupling techniques for implementation of high order narrow-bandwidth bandpass filters from micromechanical resonators using electrical coupling elements. Active and passive coupling elements are used in this work to implement high order resonant systems from individual MEMS resonators. The concept of passive coupling of resonators using capacito...

Miniaturization of superconducting coplanar waveguide bandpass filters by cross coupling

For more size reduction of the high temperature superconducting coplanar waveguide (CPW) bandpass filter (BPF), we introduce the design method of the meanderline CPW quarter-wavelength resonator BPF. The exact admittanceand susceptance-inverters are calculated by using the 2.5-dimensional electromagnetic field simulator. The prototype YBCO miniaturized BPF (center frequency =10GHz, n=3, band wi...

Microelectromechanical bandpass filters based on cyclic coupling architectures

Electrically coupled MEMS bandpass filters Part II. Without coupling element

This paper, the second of two parts, introduces electrostatic coupling of micromechanical resonators for implementation of high-order narrow-bandwidth bandpass filters. The concept of electrostatic coupling of closely spaced microresonators and its electromechanical modeling is presented. Electrostatic coupling of resonators does not require any distinct physical coupling elements. The electros...