Design of a Microstrip Bandpass Filter for 3.1-10.6 GHz Uwb Systems (original) (raw)

Review on Performance Analysis of UWB Bandpass Microstrip Filters

In the last few years, several microwave filter design with band-pass response have been proposed for ultra-wideband (UWB) application. Among various microwave filter design, microstrip filter are most widely used by researcher due to the features like light weight, easy to fabricate and low cost. Conventional microstrip filter can be in any shape like circular, rectangular or elliptical but some modification or additional variation in their basic design can be made for different purposes. This paper reviews the performance analysis of Microstrip UWB bandpass filters designed using MMR, Multi Short Circuited Stubs, PCML, Ring Resonators, SIR. In this paper an effort is made to review performance in terms of insertion loss, return losses, bandwidth and group delay. Keywords: Multiple Mode Resonators (MMR), parallel coupled microstrip line (PCML), stepped impedence resonator (SIR), Federal Communication Commission (FCC) _______________________________________________________________________________________________________

Design of UWB bandpass filter for wireless communication applications

2014 International Conference on Electronics and Communication Systems (ICECS), 2014

An Ultra Wide Band , band pass filter (BPF) with a fractional bandwidth (FBW) of about 110% is developed using a microstrip transmission line structure, comprising of bent short circuited stubs separated by bend connecting lines. This approach resulted in a compact structure and it exhibited a selective filtering characteristic equivalent to a 9-pole Chebyshev filter. The insertion loss and return loss in the UWB band are found to be 0.45 dB and 11 dB respectively and a group delay of about 0.4 ns over the band. Experimental and theoretical filter parameters are found to agree well.

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.

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 Novel Low-Cost Microstrip Bandpass Filter for Ultra- Wideband RF Applications

A novel wideband bandpass filter (WBPF) using planar technology with compact size and sharp cutoff frequency is proposed. The presented microstrip filter consists of a three parallel coupled lines (TPCL) with a radial open stub. To validate the designed filter in term of compactness, insertion loss, return loss, and transmission zeros, a high meshing density is applied in two electromagnetic solvers Advanced Design System (ADS) and CST-Microwave Studio. The proposed filter is fabricated on an FR4 substrate with a relative dielectric constant of 4.4 and 1.58mm of substrate thickness and fed by a two 50Ω microstrip lines. Further, the filter is measured which exhibits a return and insertion losses of 20dB and 0.49dB, respectively, with a center frequency around 3.5 GHz and an operating bandwidth (2.1 GHz to 5.22 GHz) of about 85 %. Good agreement between the simulated and measured results demonstrates the proposed filter design. The overall circuit size of the filter was taken to be 23.24 X 40 mm 2 .

A compact modified U-shaped UWB bandpass filter

Microwave and Optical Technology Letters, 2015

A compact ultra wideband bandpass filter (BPF) with sharp rejection and wide upper stopband is proposed in this letter. The proposed bandpass filter is constructed using modified U-shaped multimode resonator (MMR). The U-shaped MMR is loaded with two open stubs on the symmetrical locations. This proposed resonator has five resonant modes, out of which two are odd modes and the remaining are even modes. These modes are present in the UWB band and are used to realize the wideband passband of the filter. By optimizing the dimensions of the stubs, the five resonant modes of the resonator can be brought into the desired passband. This bandpass filter with fractional bandwidth better than 110% is simulated, fabricated, and measured. The measured impedance bandwidth of filter is from 3.75 to 13.75 GHz with an insertion loss of 2 dB and return loss better than 11 dB. The simulated and measured results show a good agreement. The group delay variation is less than 0.25 ns. A wide stopband bandwidth with 16 dB attenuation is up to 19 GHz is obtained in the proposed filter.

Synthesis Design of Bandpass Filter for UWB Applications with Improved Selectivity

2016

─ This paper presents the design of UWB threepole modified parallel coupled line bandpass filter with improved rejection in the out-of-band frequencies. To achieve the desired UWB requirements using the conventional bandpass filter design, a physical dimension optimization of space-gap between lines, line widths and lengths was applied. An equivalent circuit model is also presented and demonstrates reasonable agreement with simulation results. The optimized filter demonstrates an excellent UWB performance, covering the Federal Communication Commission spectrum bandwidth with low insertion loss and acceptable selectivity. However, this resulting filter structure presents very small gapping between adjacent resonators; that means the filter is unmanufactured. Then an example of an alternative filter structure is finally proposed with null gaping and shortcircuited stubs that yields to a fabricated prototype with selectivity improvement. Generally speaking, reasonable agreement is achi...

Analysis and Design of an UWB Band pass Filter with Improved Upper Stop band Performances

IJMER

Abstract: In this work, we are interesting in the analysis and the design of an ultra wideband (UWB) band pass filter with improved upper stop band performances, using microstrip lines. The design of the UWB band pass filter is based on the use of stepped-impedance low pass filter and high pass filter; whereas the simulation of its frequency response ([S]) is done using MATPAR software and it is based on the electromagnetic (EM) parameters for each section of line forming the band pass structure. Our filter with bandwidth between 2.9-10.8 GHz, measures just 12.6 1.524 31.58 mm and was fabricated using RT/D 5880 substrate by means of stepped-impedance 5-pole microstrip low pass filter and high pass filter constructed from quasilumped elements. The simulated results of stop band performances are better than 15 dB for a frequency range up to 25 GHz.

Ultra-Wideband Bandpass Filter using Short Circuited Stubs

2014

This paper presents a microstrip ultra-wideband (UWB) bandpass filter using short circuited stubs. The proposed filter is designed using combination of step impedance lowpass filter (LPF) and the optimum distributed highpass filter (HPF). The UWB filter is deployed on FR4 Epoxy dielectric substrate with thickness of 0.8mm and the filter occupies 26.4mm × 16mm die of area. This filter is operating in the whole UWB passband of 3.1 GHz to 10.6 GHz. The designed filter has been optimized using CST microwave studio software. The fabricated filter was tested and compared the result. The simulated and measured results shows the close agreement.