A novel type of dual-mode microstrip bandpass filter using degenerate modes of a meander loop resonator has been developed for miniaturization of high selectivity narrowband microwave bandpass filters. A filter of this type having a 2.5% bandwidth at 1.58 GHz was designed and fabricated. The measured filter performance is presented.

The development of numerical techniques now permits us to analyze complex structures such as dielectric resonator filters and planar passive elements for coplanar monolithic microwave integrated circuits. In this paper, we describe a novel method for designing dielectric resonator filters. Then a Chebychev band pass filter is designed by coaxially placing high-Q TM01Q dielectric resonators ...

The superconducting Monolithic Microwave Integrated Circuit (MMIC) is vital in all modern superconducting Rapid Single Flux Quantum (RSFQ) digital systems. Importance of microwave components comes from the fact that superconducting circuits operate with an ultra-wide band signal in the ultra-low dissipation environment. At a typical signal bandwidth of 300 GHz, even a 100μm superconducting wire...

This paper presents a new microwave narrow-band bandpass filter with a miniaturized size for use in modern wireless communication systems. The proposed filter design topology is based on a single-mode microstrip resonator constructed in the form of Hilbert fractal geometries from 2 nd to 4 iteration levels. The space-filling property the proposed filter topologies possess, has found to produce ...

This paper presents the design of a bandpass filter using directional coupler. The concept of transerval filters is applied to design of microwave filters. The directional coupler is used as a transversal filtering element. This is achieved by loading the coupled ports of the filter with open-circuited stubs. The dependence of filter characteristics on the stub lengths and impedances is demonst...

We demonstrate an implicit space mapping (ISM) method for microwave filter design that is enhanced and assisted by a tuning procedure. This procedure helps us to select design variables as well as suitable preassigned parameters for an ISM implementation. It also aids us in the convergence of our ISM algorithm. We investigated and solved a microstrip notch filter using this technique. This show...

Wideband and frequency-tunable microwave signal generation using an optoelectronic oscillator incorporating a Fabry-Perot laser diode (FP-LD) with external optical injection is proposed and demonstrated. Through external injection, the FP-LD functions as a tunable high-Q photonic microwave filter, and the frequency tuning is realized by either tuning the wavelength of the externally injected op...

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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...