IJERT-Design of Broadside Coupled UWB Bandpass Filter with DGS (original) (raw)
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Design of Broadside Coupled UWB Bandpass Filter with DGS
2013
Ultra wide band is a wireless technology with very low power used for transmitting data. It consists of a wide spectrum and thus has a variety of applications. It ranges from 3.1GHz to 10.6GHz.The UWB bandpass filter is an essential component in the UWB systems. In this paper a UWB band pass filter is designed using broadside coupling structure with Defective Ground Structure(DGS). It has a pass band from 3to 11 GHz. It has a minimum return loss of 15 dB of about 4 KHz and an insertion loss of 0.5 dB. The modified coupling structure is designed by using a dual-line parallel coupled line which is taper-connected to two folded open stubs. DGS is etched over the stubs to obtain better selectivity.
A Band Pass Coupled Line Filter with DGS for Ultra-Wide Band Application
Procedia Computer Science, 2020
Systems with ultra-band width make use in wireless scenario which enables information transmission over long range of frequency of small distances with a minimum power and high information rates. An ultra-wide band filter is an important requirement for high-quality signal transmission and reception. Designing a compact UWB filter insertion loss much lower is a very difficult task. A structure with ground defected is defined to be etched periodically or non-periodically, cascaded configuration of a planar transmission line whose ground is defected disturbs the current distributed in the ground. A microstrip ultra-wideband filter is introduced in this paper. The filter includes interdigital feed lines on the upper face of substrate and rectangular-shaped structure defected ground at the bottom. The filter is 26.5 x 7.546 x 1.6 mm 3 of dimension. The filter provides excellent passband (from 2.4-14.3 GHz) with a reduced return loss of-21.24 dB and insertion loss of-0.7dB at 6.9 GHz. Simulations are carried using ANSYS HFSS Electromagnetic Solver version 16.2.
Design of Ultra-Wideband (UWB) Bandpass Filters Based on Interdigital Edge Coupled Lines: A Review
ITM Web of Conferences
Since several decades ago, parallel coupled lines have found an extensive range of applications in order to design microwave circuits such us filter, impedance transformers and couplers. It gives advantages in term of low cost, easier integration with other devices and controllable performances by changing coupling coefficient between lines. This paper presents a review of parallel two and three interdigital coupled lines bandpass filters for ultra-Wideband (UWB) communication systems during previous years to achieve a fraction passband from 3.1 GHz to 10.6 GHz and then a FBW that can reach 109%. Different structures such as multiple-mode resonator, Short Circuited Stubs, Open stub, Stepped-impedance resonators and Rectangular Ring have been reportedly used to ameliorate the performances of developed filters.
Development of Compact Bandpass Filter using Defected Ground Structure for UWB Systems
This paper presents a compact Bandpass Filter (BPF) using Defected Ground Structure (DGS) for Ultra Wideband (UWB) Systems. The proposed BPF consists of interdigital coupling structure at the top and the rectangular defective ground structure at the bottom of the substrate. This filter provides insertion loss of -0.46 dB and return loss of -25 dB while the -10 dB passband of the developed filter is 9 GHz from 3.4 GHz to 12.4 GHz. The designed filter is simulated using electromagnetic simulator, IE3D and fabricated on FR4 substrate with dielectric constant of 4.4, loss tangent of 0.0004 and thickness of 1.6 mm using dual side Printed Circuit Board (PCB) technology. The total size of the developed filter is 26.2 by 2.7 mm 2 . The measured S parameters of the filter are compared with the simulated one, where the results obtained over the desired passband is at acceptable level.
Compact and High Performance UWB Band-pass Filter based on Parallel Coupled Line
7th IEEE International Symposium on Microwave Antenna Propagation and EMC Technologise, 2017
A compact and high performance ultra-wideband (UWB) band-pass filter (BPF) based on two strength coupling quarter-wavelength coupled-lines, which were often served as feedlines between the port and resonator, has been designed and fabricated. Firstly, the desired high coupling factor is achieved by using three-line coupled structure and ground plane aperture technology. Then, the two transmission zeros are generated at the two sides of the wideband to improve the selectivity of this filter by the loading stepped-impedance resonator stubs(SIRs). Finally, the proposed filter is validated through both simulated and measured results and good agreement is obtained.
Design of an Interdigital Structure Planar Bandpass Filter for UWB Frequency
International Journal of Electrical and Computer Engineering (IJECE), 2018
A new topology of miniaturized interdigital structuremicrostrip planar bandpass filter for Ultra-Wideband (UWB) frequency has been discussed in this paper. The proposed design and its simulation have been carried out by using an electromagnetic simulation software named CST microwave studio. The Taconic TLX-8 microwave substrate has been used in this research. The experimental result and analysis have been performed by using the microwave vector network analyzer. The experimental result showed that the-10dB bandwidth of the filter is 7.5GHz. The lower and upper corner frequencies of the filter have been achieved at 3.1GHz and 10.6GHz respectively. At the center frequency of 6.85GHz, the-1dB insertion loss and the-7dB return losshave been observed. The simulated and experimental results are well agreed with a compact size filter of 19×21×0.5mm 3. 1. INTRODUCTION Potential applications of the UWB technology are, position measurement, short-range high-speed wireless communication, rescue radar systems, medical applications and so on [1]. Since 2002, the UWB technology has been regulated by the Federal Communications Commission (FCC) rules; hence any kind of design in this band must follow the FFC guidelines. Microstrip planar bandpass filter is an important component of the UWB system, which can be easily made under FCC regulations. A microstrip bandpass filter can offer extensive performance in the UWB communication. It is capable to select the required band and separating the different frequency ranges as the requirements. A microstrip line is a simple type of the transmission line which can be easily fabricated, miniaturized and connected with the microwave components [2]. In recent times, UWB bandpass filter is widely used in high-speed wireless data communication system because of its excellence [3]. In order to have a compact, cost-effective and easy integration with other microwave components the microstrip waveguide is one of the better options for designing a bandpass filter. Due to the huge potential, in recent times, many academic, research institutions and industries have focused on UWB technology. Various types of UWB microstrip filters are designed and developed. A bandpass filter with dual notched behaviour is reported in [4], a novel UWB bandpass filter is designed in [5], UWB filter with DGS is developed in [6], the U-shaped slot coupling structure is designed in [7] and UWB bandpass filter with CPW structure is developed in [8]. Though these filters have flat passband, low insertion loss and compact in size, however, most of these cover beyond the UWB frequency range. Consequently, they make interference with the licensed
A COMPACT MICROSTRIP BANDPASS FILTER USING VARIOUS COUPLING TOPOLOGY FOR UWB APPLICATION
ARPN, 2015
This paper presents the design of Microstrip bandpass filter with Hairpin structure, Comb line structure, and tree coupled structure and cross coupled hairpin filter configurations with the center frequency of 4.8 GHz. The simulation of these configurations is performed using the ADS Simulation Tool. The four coupling topology filter is designed for the substrate FR4 (Flame Retardant) with the dielectric constant 4.4. The simulated results show that the coupling topology filters designed here are operating well for their desired specifications with good dielectric constants provides the highest return loss and lower insertion loss for filter configurations.
MICROSTRIP COUPLED LINE FILTER DESIGN FOR ULTRA WIDEBAND APPLICATIONS
A compact microstrip parallel coupled line filter for ultra wide band applications by means of combining a network of coupled line and defected ground is proposed. The design equations for three and five interconnected networks are derived and implemented. Simulations for three different configurations for filters are optimized. Then three prototype circuits are constructed, a bandpass filter with center frequency 2.25 GHz and two different bandpass filters (in terms of perturbations) with center frequencies 2.33GHz. For 2.25 GHz circuit wide fractional bandwidth of about 90% is obtained but undesired high return loss existed. For 2.33GHz circuit with grooves in sides fractional bandwidth of about 60% is obtained at about 3.4 GHz center frequency. However undesired return loss existed for this circuit whereas good out off band performance is achieved. For 2.33GHz circuit with grooves in whole sections the center frequency got shifted to about 3.4 GHz and about 50% fractional bandwidth is obtained with very good out off band performance observed.
2014
In this paper, a novel compact ultra-wideband band-pass filter with good transmission characteristic and group delay is presented by using a new kind of multiple-mode resonator (MMR), open stubs and DGS. The out of band performance has been improved by cascading the structure through coupling mechanism which in turn helps in size reduction. The dimension of this structure is 10.74 mm x 2.82 mm (not including the 50 Ω microstrip), which is much less than conventional structure.
Design And Analysis of Compact Uwb Band Pass Filter
International Journal of Electromagnetics (IJEL)
This paper presents design, implementation and analysis of an ultra-wideband (UWB) band-pass-filter using parallel-coupled microstrip line with defective ground plane and a uniform multi-mode resonator. The structure of the filter is designed on microwave substrate GML 1000 of dielectric constant 3.2 and height is 0.762 mm. Simulation is carried out by CST MSW software and optimized structure is fabricated. The frequency response is measured on vector analyzer and measured results show close approximation with simulation results. In this article modeling of the proposed filter is also reported. The electric model of the filter is analyzed by circuit theory and MATLAB. This model is validated by comparing the results with the CST simulation and VNA measured results. This filter is compact in size of dimension 30˟1.87 mm2 may be useful for modern wireless application of communication.