MICROSTRIP FILTER WITH SLOT RESONATORS IN GROUND PLANE
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2013, Vol 766, Issue 2013
Abstract
The development of contemporary SHF systems calls for a broad nomenclature of frequencyselective devices, band-pass filters in particular. One of the possible directions of filter design is the usage of electromagnetic-bandgap (EBG) structures, which can be implemented in the form of certain slots in a microstrip line’s ground plane. It was previously proposed to use these structures as parts of output matching networks of high-efficiency SHF amplifiers built according to harmonicmanipulation approach. The use of the mentioned structures would be more effective if they themselves could perform as matching network. By utilizing the results of theoretical and experimental research of harmonic filters built on microstrip line’s ground plane slots, let’s consider design of networks that are capable of performing other relevant function in addition to that of band-reject filters. The goal of the current work is to investigate the possibility of application of the microstrip line’s ground plane slot resonators (bandreject filters) to the design of band-pass filters. This research can also contribute to the design of such output matching networks of SHF amplifiers that must simultaneously perform the tasks of harmonics filtering and impedance matching on the fundamental frequency of amplifier’s operation. In order to achieve this task a band-pass filter was proposed and studied theoretically and experimentally. The filter includes two sections of band-reject filters, each section consisting of two slot resonator located in microstrip line’s ground plane, while the line section with slots at the same time works as a part of three-section band-pass filter. Each slot resonator can be represented as a parallel resonant circuit connected serially into the transmission line. Parameters of the parallel resonant circuit are calculated from the known resonant frequency of the slot resonator and wave impedance of the slot line. The characteristics of the filter were calculated with the aid of ABCD matrices. The matrices represented every slot, line sections between the slots and variation of the line’s characteristic impedance (the width of microstrip line). The results of calculation were compared with results of electromagnetic simulation and experimental study of the filter test sample. The considered filter was found to have characteristics similar to that of a filter built on half-wave resonators, but the signal suppression in the upper pass-band was much higher compared with situation when only a step-like variation of characteristic impedance was used in the filter. Herewith the overall length of the filter with slot resonators was not higher than that of the prototype. Using a test sample of the three-section filter manufactured on Rogers 3010 material with thickness 0.635 mm and nominal relative permittivity ε = 10.2 the signal suppression in 2.0–3.6 GHz band was measured to be within the range of 0.1 to 3 dB, while in 4.6–6 GHz band the signal suppression was found to be more than 20 dB.
Authors and Affiliations
V. Krizhanovski
Keywords
Related Articles
- EP ID EP460984
- DOI -
- Views 136
- Downloads 0
THE EXPANSION OF THE POSSIBILITIES OF THE SYSTEM PROGRAM FUNCTIONS MAOPCs FOR THE STUDY OF LINEAR PERIODICALLY-TIME-VARIABLE CIRCUITS
The system program function MAOPCs is designed to study multivariate analysis and optimization of state linear periodically-time-variable circuits. The architecture of the system MAOPCs is based on the principles of soft...
LINEARY MAX-PLUS MODELS APPLYNG IN TRAFFIC MANAGEMENT TASKS
Development of next generation networks concept let to reconfigure the most of existing traffic controls at telecommunication node. Necessity of its modification causes of low efficient network resources usage. Among of...
METHOD OF ESTIMATION OF INDEXES OF EFFICIENCY OF THE RADIO ELECTRONIC COMPLEX SYSTEM MONITORING OF AIR SPACE
In this paper a method for estimation efficiency indexes for algorithm behavior of radioelectronic complex system of airspace monitoring is developed. This method takes into account the structure of radioelectronic compl...
THE INVESTIGATION OF THE AVAILABILITY AT CLOUD SERVICE SYSTEMS
This paper is devoted to the numerical investigation of the availability at cloud service systems. In this paper criteria and constraints calculations were performed and obtained results were analyzed for synthesis purpo...
RESIZABLE SCANNING RASTER GENERATION IN TELEVISION OPTICAL MICROSCOPE
High resolution cathode-ray tube (CRT) uses in television optical microscope (TOM) for lighting of investigated microobject (MO) [1–4]. Light, which goes through investigated MO, or reflected from it, projects on photose...