Compact and novel coupled line microstrip bandpass filter based on stepped impedance resonators for millimetre-wave communications

Frequenz ◽  
2021 ◽  
Vol 75 (5-6) ◽  
pp. 147-152
Author(s):  
Zahid A. Bhat ◽  
Javaid A. Sheikh ◽  
Sharief D. Khan ◽  
Raqeebur Rehman ◽  
Shazia Ashraf
Keyword(s):  
Filter Design ◽  
Low Cost ◽  
Future Generation ◽  
Band Pass Filter ◽  
Coupled Line ◽  
Pass Filter ◽  
Millimetre Wave ◽  
Band Pass ◽  
Sharp Rejection ◽  
Good Agreement

Abstract This paper presents a compact and the low-cost coupled line band-pass filter with application to future generation millimetre-waves and 5G communications. The proposed approach of the filter design is based on the coupled-line and centre tapped upper and lower stepped impedance resonators. These resonators generate the sharp rejection, wide bandwidth, and abet to realize the compact filter. A detailed theoretical as well as the numerical analysis of the filter has also been investigated. As a demonstration, the proposed band-pass filter configuration has been designed and fabricated at the 33.5 GHz frequency using a low-cost PCB technique. It has observed that the proposed filter, results in a better return loss and the low insertion loss. The experimental results has been presented and compared with the simulated results and has found quite satisfactory. Moreover the results obtained validate a good agreement with each other.

COMPACT MICROSTRIP BAND-PASS FILTER FOR EMI REDUCTION

2015 ◽  
Vol 77 (12) ◽  
Author(s):  
Kabir Ibrahim Jahun ◽  
Hussein Mohamed Hagi Hassan Abdirahman Mohamud Shire ◽  
Ali Orozi Sougui ◽  
S. H. Dahlan
Keyword(s):  
Filter Design ◽  
Stop Band ◽  
Band Pass Filter ◽  
Defected Ground Structure ◽  
Coupled Line ◽  
Pass Filter ◽  
Filter Structure ◽  
Coupled Lines ◽  
Band Pass ◽  
Compact Design

Compact microstrip band-pass filter design using parallel coupled lines is presented in this paper. The microstrip lines are calculated and constructed using CST studio with two input and output ports of the filter structure are printed over Defected Ground Structure (DGS).The proposed symmetrical structure offers a simple and compact design while exhibiting an improved stop-band characteristics in comparison to conventional coupled microstrip line filter structure. The simulation and measurements of 2GHz prototype band pass filter are presented. The measured result agrees well with the simulation data. Compared with conventional parallel coupled line band pass filter, the second, third and fourth spurious responses are suppressed; in addition, the size of the prototype filter circuit is reduced up to 20.8%.  

scholarly journals Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2173
Author(s):  
Dong-Sheng La ◽  
Xin Guan ◽  
Shuai-Ming Chen ◽  
Yu-Ying Li ◽  
Jing-Wei Guo
Keyword(s):  
Bandpass Filter ◽  
Filter Design ◽  
Design Method ◽  
Band Pass Filter ◽  
Coupled Line ◽  
Pass Filter ◽  
Transmission Zeros ◽  
Coupled Lines ◽  
Band Pass ◽  
Line Cross

In this paper, a wideband bandpass filter with a coupled line cross-shaped resonator (CLCSR) is proposed. The proposed bandpass filter is composed of two open-end parallel coupled lines, one short-end parallel coupled line, one branch microstrip line, and the parallel coupled line feed structure. With the use of the even and odd mode approach, the transmission zeros and transmission poles of the proposed bandpass filter are analyzed. The coupling coefficient of the parallel coupled line feed structure is big, so the distance between the parallel coupled line is too small to be processed. A three microstirp lines coupled structure is used to realize strong coupling and cross coupling. This structure also can reduce the return loss in passband and increase the out-of-band rejection. The transmission zeros can be adjusted easily by varying the lengths of the open-end parallel coupled line or the short-end parallel coupled line. The proposed bandpass filter is fabricated and measured. The simulated results agree well with the measured ones, which shows that the design method is valid.

A Reduced-Size Microstrip Four Poles Hairpin Band-Pass Filter with Multilayer Parallel-Coupled Line for Satellite Broadcasting

2020 ◽  
Author(s):  
Qazwan Abdullah Tarbosh ◽  
Nor Shahida Mohd Shah ◽  
Bishwajeet Pandey ◽  
Adeeb Salh ◽  
Nabil Farah ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Bandpass Filter ◽  
Filter Design ◽  
Center Frequency ◽  
Design System ◽  
Band Pass Filter ◽  
Coupled Line ◽  
Pass Filter ◽  
Satellite Broadcasting ◽  
Band Pass

Recently, a multilayer structure is very imperative to minimize the size of planar microstrip filters. In the flexible design and incorporation of other microwave components, a multilayer band-pass filter provides another dimension. This paper, therefore, introduces a band-pass filter of 2.52-2.65 GHz for digital broadcast applications using parallel-coupled line (PCL) and multilayer(ML) hairpin resonator. The targeted four-pole resonator has a center frequency of 2.58 GHz with a bandwidth of 130 MHz. The hairpin-line offers compact filter design structures. The proposed configuration of the parallel-coupled line (PCL) resonator is used to design the ML band-pass filter. The FR4 substrate with a dielectric constant (εr) of 4.3 and 1.6 mm thickness was used. Comparison analysis between the simulated insertion loss and the reflection coefficient of substrates RO3003 and FR4 was performed to verify the efficiency of the proposed filter design. Simulation of PCL filter is accomplished using computer simulation technology (CST)and an advanced design system(ADS). The PCL bandpass filter was experimentally validated and good agreement between simulation and measured results were achieved showing a well-measured reflection coefficient. The simulated results of the ML bandpass filter show that the circuit performs well, and the filter size is significantly reduced.

Microwave Filter Design Optimized for Ceramic Multilayer Technique

2016 ◽  
Vol 2016 (CICMT) ◽  
pp. 000199-000202
Author(s):  
Peter Uhlig ◽  
Juergen Kassner ◽  
Carsten Guenner ◽  
Elke Noack
Keyword(s):  
Filter Design ◽  
Three Dimensional ◽  
Microwave Filters ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Millimetre Wave ◽  
Filter Performance ◽  
Filter Synthesis ◽  
Microwave Engineering ◽  
Manufacturing Tolerances

Abstract Low Temperature Co-fired Ceramic (LTCC) is a proven packaging technology for microwave and millimetre-wave applications. Advanced low-loss material systems and improved manufacturing technology facilitate economic and highly reliable packaging solutions for automotive, telecom, medical and security applications. One of the virtues of LTCC is the option to integrate all kinds of components into the multilayer. Embedded passives include resistors, capacitors and inductors. Moving matching networks and filters into inner layers is further increasing density of integration. Microwave filters in LTCC can be used as an integral part of a larger package but also as single components mounted as drop-in or SMT. Ceramic multilayer technology allows for new filter concepts with three-dimensional routing and integration. Tolerances in material properties and manufacturing are challenges to be met with the design and production of microwave filters. Tape thickness, permittivity, shrinkage, registration of conductor pattern to via position, conductor width and thickness are some of the parameters that influence filter performance and reproducibility. This paper shall compare two different concepts for a 20 GHz band pass filter regarding their sensitivity to manufacturing tolerances. An optimized filter design shows improved robustness against manufacturing tolerances. This concept particularly reduces the sensitivity to registration tolerances of conductors and ground vias. A filter synthesis and simulation which takes into account systematic and random manufacturing effects takes out some of the guesswork of filter design and fabrication. It will also reduce the trial and error loops traditionally involved with this part of microwave engineering.

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