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.

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.

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 Enhanced Bandwidth of Band Pass Filter Using a Defected Microstrip Structure for Wideband Applications

2018 ◽  
Vol 8 (6) ◽  
pp. 5260 ◽  
Author(s):  
Sanae Azizi ◽  
Mustapha El Halaoui ◽  
Abdelmoumen Kaabal ◽  
Saida Ahyoud ◽  
Adel Asselman
Keyword(s):  
Bandpass Filter ◽  
Dielectric Substrate ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Bandwidth Enhancement ◽  
Wireless Applications ◽  
Coupled Lines ◽  
Band Pass ◽  
Microstrip Structure

<p>In this paper, the bandwidth enhancement of bandpass filter (BPF) is proposed by utilizing defected microstrip structure (DMS). The initial micro strip BPF which is designed to have the bandwidth 1GHz with the center frequency of 3.5GHz is deployed on FR4 Epoxy dielectric substrate with overall size and thickness of 14mm x 24mm and 1.6mm, respectively. The proposed filter consists of two parallel coupled lines centred by ring-shaped, to enhance the bandwidth response, an attempt is carried out by applying DMS on the ligne center with a ring-shaped of initial filter. Here, the proposed DMS is constructed of the arrowhead dumbbell. Some parametrical studies to the DMS such as changing to obtain the optimum geometry of DMS with the desired bandwidth response. From the characterization result, it shows that the utilization of DMS on to the microstrip ligne of filter has widened 3dB bandwidth response up to 1.8GHz ranges from 2.55GHz to 4.35GHz yielding an enhanced wideband response for various wideband wireless applications.</p>

HF Voltage-Controllable Band-Pass Filter Based on Varactor

2014 ◽  
Vol 631-632 ◽  
pp. 327-332
Author(s):  
Sheng Qian Ma ◽  
Chang Rong Zhao ◽  
Yan Ping Ji
Keyword(s):  
Filter Design ◽  
Design Method ◽  
Center Frequency ◽  
Resonant Circuit ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Junction Capacitance ◽  
Function Expression ◽  
Band Pass ◽  
And Function

Varactor to replace commonly variable capacitance is applied to the tuner. This paper presents the voltage-controllable band-pass filter design method. The filter constitutes of operational amplifier, resistors, varactor MV209 and parallel LC resonant circuit. Center frequency range of the band-pass filters is from 19MHz to 25MHz controlled with DC voltage. It derives the transfer function of the filter and function expression of junction capacitance with reverse voltage. The frequency response of filter simulation and experimental results are given. Key words: Varactor; Band-Pass Filter; Voltage-Controllable Filter; Junction Capacitance

Narrowband Bandpass Microstrip Filter Design

2014 ◽  
Vol 945-949 ◽  
pp. 2338-2341
Author(s):  
Yang Li
Keyword(s):  
Filter Design ◽  
Narrow Band ◽  
Simulation Software ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Filter ◽  
Prototype Structure ◽  
Narrow Band Filter ◽  
Band Pass

This paper analyzes the basic theory of the microstrip narrow-band filter design and accomplishes the design of narrow band-pass filter whose center frequency is on L-band with the help of the Agilent ADS simulation software. The filter adopts Chebyshev’s prototype structure and consists of coupled microstrip line. Its fluctuation is less than 0.5dB and attenuation is less than 1.5dB between 1.9GHZ and 2.1GHZ .Its port Reflection coefficient less than-15dB and attenuation is greater than 20dB at 1.72GHZ and 2.3GHZ. Layout simulation meets the requirement of filter design.

scholarly journals Design and Synthesis of Multi-Mode Bandpass Filter for Wireless Applications

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2853
Author(s):  
Satheeshkumar Palanisamy ◽  
Balakumaran Thangaraju ◽  
Osamah Ibrahim Khalaf ◽  
Youseef Alotaibi ◽  
Saleh Alghamdi
Keyword(s):  
Quality Factor ◽  
Bandpass Filter ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Coaxial Cavity ◽  
Wireless Applications ◽  
Design And Synthesis ◽  
Band Pass

In this paper, a compact bandpass filter with improved band stop and band pass characteristics for wireless applications is built with four internal conductive poles in a single resonating cavity, which adds novel quad-resonating modes to the realization of band pass filter. This paper covers the design and testing of the S-band combline coaxial cavity filter which is beneficial in efficient filtering functions in wireless communication system design. The metallic cavity high Q coaxial resonators have the advantages of narrowband, low loss, better selectivity and high potential for power handling, as compared to microstrip filter in the application to determine the quality factor of motor oils. Furthermore, the tuning of coupling screws in the combline filter allows in frequency and bandwidth adjustments. An impedance bandwidth of 500 MHz (fractional bandwidth of 12.8%) has been achieved with an insertion loss of less than 2.5 dB and return loss of 18 dB at the resonant frequency. Four-pole resonating cavity filters have been developed with the center frequency of 4.5 GHz. Insert loss at 0 dB and estimated bandwidth at 850 MHz and a quality factor of 4.3 for the band pass frequencies between 4 and 8 GHz is seen in the simulated result.

scholarly journals Design and Realization of a Compact High-Frequency Band-Pass Filter with Low Insertion Loss Based on a Combination of a Circular-Shaped Spiral Inductor, Spiral Capacitor and Interdigital Capacitor

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 195 ◽  
Author(s):  
Ki-Hun Lee ◽  
Eun-Seong Kim ◽  
Jun-Ge Liang ◽  
Nam-Young Kim
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Center Frequency ◽  
Spiral Inductor ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Interdigital Capacitor ◽  
In Series ◽  
Band Pass

In this study, the proposed bandpass filter (BPF) connects an interdigital and a spiral capacitor in series between the two symmetrical halves of a circular intertwined spiral inductor. For the mass production of devices and to achieve a higher accuracy and a better performance compared with other passive technologies, we used integrated passive device (IPD) technology. IPD has been widely used to realize compact BPFs and achieve the abovementioned. The center frequency of the proposed BPF is 1.96 GHz, and the return loss, insertion loss and transmission zero are 26.77 dB, 0.27 dB and 38.12 dB, respectively. The overall dimensions of BPFs manufactured using IPD technology are 984 × 800 μ m 2 , which is advantageous for miniaturization and integration.

scholarly journals CPW based Band Pass Filter Using DGS for ISM Band Applications

2018 ◽  
Vol 7 (3.34) ◽  
pp. 421
Author(s):  
Mrs. S. Jalaja ◽  
Dr V. Prithivirajan ◽  
K Gajalakshimi ◽  
S Chitra ◽  
R Nithya
Keyword(s):  
Bandpass Filter ◽  
Coplanar Waveguide ◽  
Center Frequency ◽  
Band Pass Filter ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Pass Filter ◽  
Ism Band ◽  
Band Pass ◽  
Filtering Effect

The design and simulation of coplanar waveguide (CPW) bandpass filter (BPF) has been described in this paper. It mainly focuses on Defected Ground Structure (DGS), where U-shaped DGS with open stub in transmission line has been introduced. By etching the DGS pattern in ground and transmission will change the distribution of inductance and capacitance to produce filtering effect. This paper also discusses about the influence of geometrical parameter l for the improvement in the frequency response of bandpass filter. As increasing the dimension of the geometric parameter l shift the center frequency to the higher frequencies. This filter offers a bandwidth of 1.65 GHz with passband ranging from 2.1 GHz to 3.75 GHz with a stopband rejection is about -28 dB.  

scholarly journals Band-Pass Filter Microstrip at 3 GHz Frequency Using Square Open-Loop Resonator for S-Band Radar Applications

2020 ◽  
Vol 20 (2) ◽  
pp. 53
Author(s):  
Rima Anisa Maulidini ◽  
M. Reza Hidayat ◽  
Teguh Praludi
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Open Loop ◽  
Center Frequency ◽  
Design System ◽  
Substrate Thickness ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Measurement Results ◽  
Band Pass

In telecommunication, filters are often used to pass the desired frequency. One of them is the Band-Pass Filter (BPF) which is passing signals between the upper cut-off frequency and the lower cut-off frequency. This research aims to make a band-pass filter that can pass 3 GHz frequency with a bandwidth of 200 MHz. This filter is designed with a square open-loop resonator simulated using Advanced Design System (ADS) software. The filter is made using FR 4-epoxy substrates with a dielectric constant (ε ) of 4.6 and substrate thickness (h) of 1.6 mm. Based on the simulation results obtained in the form of a comparison graph between the response of magnitude to frequency, it shows that the value of the return loss (S 11 ) parameter of -23.549 dB, insertion loss (S 21 ) parameter value of -1.397 dB, and a slightly shifted middle frequency of 2.890 GHz. Then for the measurement results obtained a parameter value return loss (S 11 ) of -16.364 dB, parameter value insertion loss (S 21 ) of -3.561 dB with a center frequency of 3.185 GHz.

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.

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