An UWB band pass filter with a notch band using stub loaded multi-mode resonator

2012 ◽  
Author(s):  
Sharmili Adhikari ◽  
Ishita Rakshit ◽  
Manimala Pal ◽  
Pankaj Sarkar ◽  
Rowdra Ghatak
Keyword(s):  
Band Pass Filter ◽  
Pass Filter ◽  
Notch Band ◽  
Band Pass ◽  
Multi Mode ◽  
Mode Resonator

A compact UWB band-pass filter with a notch band using multi-mode stub-loaded resonators (MM-SLR)

2018 ◽  
Vol 10 (2) ◽  
pp. 227-233
Author(s):  
Gholamreza Karimi ◽  
Fatemeh Javidan ◽  
Amir Hossein Salehi
Keyword(s):  
Stop Band ◽  
Ultra Wideband ◽  
Pass Band ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Notch Band ◽  
Compact Size ◽  
Mathematical Formulas ◽  
Band Pass ◽  
Multi Mode

AbstractIn this paper, an ultra-wideband (UWB) band-pass filter (BPF) with a sharp notch band is presented. The UWB BPF consists of modified elliptical-ring and multi-mode stub-loaded resonator (MM-SLR). By adding the asymmetric tight coupled lines resonator via input/output (I/O) lines, it can be achieved UWB band-pass response. With adding two bends to the middle resonator, a notch band at 6.86 GHz is created, so that it can be controlled using the mathematical formulas (MF). In the meantime, the equivalent circuit of the middle resonator is obtained using L–C analysis. Measured results of fabricated filter have the advantage such as ultra-wide pass band (flandfHof the defined UWB pass band are 3.776 and 10.42 GHz, which satisfy the requirements of FCC-specified UWB limits), compact size, low insertion loss <0.65 dB and the stop band of the proposed filter is from 11.1 to 16.32 GHz with attenuation of −39.8 to −42.14 dB, respectively. The proposed UWB filter is realized using the substrate with dielectric constant of 2.2 and substrate height of 0.787 mm. Experimental verification is provided and good agreement has been found between simulation and measurement results.

scholarly journals Design of a Broadband Band-Pass Filter with Notch-Band Using New Models of Coupled Transmission Lines

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Navid Daryasafar ◽  
Somaye Baghbani ◽  
Mohammad Naser Moghaddasi ◽  
Ramezanali Sadeghzade
Keyword(s):  
Frequency Response ◽  
Transmission Lines ◽  
Band Pass Filter ◽  
Pass Filter ◽  
New Model ◽  
Notch Band ◽  
New Models ◽  
Basic Parameters ◽  
Band Pass ◽  
Coupled Transmission Lines

We intend to design a broadband band-pass filter with notch-band, which uses coupled transmission lines in the structure, using new models of coupled transmission lines. In order to realize and present the new model, first, previous models will be simulated in the ADS program. Then, according to the change of their equations and consequently change of basic parameters of these models, optimization and dependency among these parameters and also their frequency response are attended and results of these changes in order to design a new filter are converged.

scholarly journals Tri-Band Band-Pass Filter Based on Multi-Mode Spoof Surface Plasmon Polaritons

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 14767-14776 ◽  
Author(s):  
Hongxin Zhao ◽  
Peng Zhou ◽  
Zhixia Xu ◽  
Shunli Li ◽  
Mei Yang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Multi Mode ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

scholarly journals A Low-Cost Microwave Filter with Improved Passband and Stopband Characteristics Using Stub Loaded Multiple Mode Resonator for 5G Mid-Band Applications

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 450
Author(s):  
Falih M. Alnahwi ◽  
Yasir I. A. Al-Yasir ◽  
Abdulghafor A. Abdulhameed ◽  
Abdulkareem S. Abdullah ◽  
Raed A. Abd-Alhameed
Keyword(s):  
Dielectric Material ◽  
Low Cost ◽  
Impedance Bandwidth ◽  
Band Pass Filter ◽  
Resonant Frequencies ◽  
Pass Filter ◽  
Multiple Mode ◽  
Mathematical Expressions ◽  
Band Pass ◽  
Mode Resonator

This paper presents the design and implementation of a printed circuit microwave band-pass filter for 5G mid-band applications, using a Stub Loaded Multiple Mode Resonator (SL-MMR) technique. The objective of this article is to introduce a low-cost microstrip filter with improved passband and stopband characteristics, based on a mathematical analysis of stub loaded resonators. The filter cost is reduced by selecting the low-cost FR4 dielectric material as a substrate for the proposed filter. Based on the transmission line model of the filter, mathematical expressions are derived to predict the odd-mode and the even-mode resonant frequencies of the SL-MMR. The mathematical model also highlights the capability of controlling the position of the SL-MMR resonant frequencies, so that the 5G sub-band that extends along the range (3.7–4.2 GHz) can perfectly be covered with almost a flat passband. At the resonance frequency, a fractional bandwidth of 12.8% (500 MHz impedance bandwidth) has been obtained with a return loss of more than 18 dB and an insertion loss of less than 2.5 dB over the targeted bandwidth. Furthermore, a pair of parasitic elements is attached to the proposed filter to create an additional transmission zero in the lower stopband of the filter to enhance the suppression of the filter stopband. The measured and simulation results are well agreed, and both reveal the acceptable performance of the stopband and passband characteristics of the filter.

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