scholarly journals Tight-coupled microstrip hairpin bandpass filter

2021 ◽  
Author(s):  
Amel Ramdedović ◽  
◽  
Sehabeddin Taha Imeci ◽  
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Real Life ◽  
Dielectric Substrate ◽  
Wireless Internet ◽  
Wireless Internet Access ◽  
Parametric Studies ◽  
Highly Correlated

The paper depicts a microstrip hairpin bandpass filter design, simulation, fabrication and test. The proposed microstrip filter's design is comprised of five hairpin structures separated by a tenth of a mm distance for which various parametric studies have been conducted. The simplicity of design provides inexpensive and undemanding filter. The filter is fabricated with suitable parametric results. The design is based on Chebyshev's values for the prototype, with N (the order of filter) number being equivalent to five. The final fabricated version of the project is based upon FR4 dielectric substrate with the input return loss being below -10 dB and insertion loss above – 2 dB. Approximate values of the input reflection coefficient and insertion loss are -33.34 dB and -1.72 dB respectively. Furthermore, the frequency range for the proposed geometry is between approximately 2.6 GHz and 3.6 GHz. The proposed filter is fabricated and the results measured in real life are highly correlated to the results simulated in the software. The proposed microstrip hairpin bandpass filter can be utilized in wireless internet access and communication.

scholarly journals A Bandpass Filter Using Half Mode SIW Structure with Step Impedance Resonator

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 51
Author(s):  
Min-Hang Weng ◽  
Chin-Yi Tsai ◽  
De-Li Chen ◽  
Yi-Chun Chung ◽  
Ru-Yuan Yang
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Design Concept ◽  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Design Curve ◽  
Transmission Zeros ◽  
Measured Response

This paper presents a miniaturized bandpass filter, which uses half mode substrate integrated waveguide (HMSIW) structure with embedded step impedance structure (SIS). By embedding the stepped impedance structure into the top metal of the waveguide cavity, the center frequency can be quickly shifted to a lower frequency. The operating center frequency of the proposed bandpass filter (BPF) using HMSIW resonators with embedded SIS is tunable as functions of the parameters of the SIS. The design curve is provided. A filter example of the center frequency of the filter at 3.5 GHz is fabricated and measured, having the insertion loss |S21| less than 3 dB, and the return loss |S11| greater than 10 dB. The transmission zeros are located at 2.95 GHz and 3.95 GHz on both sides of the passband, both of which are lower than 30 dB. The simulation result and the measured response conform to the proposed design concept. The proposed HMSIW filter design is in line with the current 5G communication trend.

scholarly journals Design of microstrip hairpin bandpass filter for 2.9 GHz – 3.1 GHz s-band radar with defected ground structure

2019 ◽  
Vol 14 (4) ◽  
pp. 448-455 ◽  
Author(s):  
Nanang Ismail ◽  
Teddy Surya Gunawan ◽  
Santi Kartika S ◽  
Teguh Praludi ◽  
Eki A.Z. Hamidi
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Center Frequency ◽  
Small Displacement ◽  
Substrate Thickness ◽  
Frequency Range ◽  
Defected Ground Structure ◽  
Ground Structure

Radar has been widely used in many fields, such as telecommunication, military applications, and navigation. The filter is one of the most important parts of a radar system, in which it selects the necessary frequency and blocks others. This paper presents a novel yet simple filter design for S-band radar in the frequency range of 2.9 to 3.1 GHz. The center frequency of the filter was designed at 3 GHz with a bandwidth of 200 MHz, insertion loss larger than -3 dB and return loss less than -20 dB. Fifth order microstrip hairpin bandpass filter (BPF) was designed and implemented on Rogers 4350B substrate which has a dielectric relative constant value of (εr)= 3.48 and substrate thickness of (h) =1.524 mm. One element of the square groove was added as Defected Ground Structure (DGS) which can decrease the filter size, reduce harmonization, and increase return loss. Two scenarios were used in the measurement, i.e. with and without enclosed aluminum casing. Results showed that BPF without casing obtained the insertion loss of -1.748 dB at 2.785 GHz and return loss of -21.257 dB in the frequency range between 2.785 to 2.932 GHz. On the other hand, BPF with casing shows a better performance, in which it obtained the insertion loss of -1.643 dB at 2.921 GHz and return loss of -19.529 in the frequency range between 2.820 to 3.021 GHz. Although there is small displacement of frequency and response value between the simulation and implementation, our BPF has the ability to work on S-band radar with a frequency range of 2 to 4 GHz. 

scholarly journals Sharp Skirt Dual-Mode Bandpass Filter with Overlay Plate to Control Upper Passband Edge

2019 ◽  
Vol 8 (6) ◽  
pp. 2357-2360
Keyword(s):  
Analytical Model ◽  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Center Frequency ◽  
Dual Mode ◽  
Rf Receivers ◽  
Attenuation Level ◽  
Frequency Selective ◽  
Fixed Center

This paper presents design and analytical model for Sharp Skirt Dual-Mode Bandpass Filter for RF receivers. Proposed filter is designed using open stub loaded H shaped resonator. Based on analytical model insertion loss S21 and return loss S11 for proposed filter are demonstrated. Inductive Overlaying plate is proposed to control upper passband edge of proposed filter to improve frequency selectivity with fixed center frequency. The proposed filter has sharp frequency selective range from 5.1GHz to 9.2GHz. With overlay plate, frequency selective range is tuned to 5.1GHz-8.6GHz. Without overlaying plate the proposed filter has return loss greater than 10dB and insertion loss of 0.7dB. Lower and upper passband edges are at 5.1GHz and 9.2GHz with attenuation level of 52dB and 54dB respectively. With overlaying plate, the filter has same S 11 and S 21 parameters, but upper passband edge is shifted from 9.2GHz to 8.6GHz

scholarly journals Directivity Enhancement in Non-Reciprocal Bandpass Filters using an Evolutionary Algorithm

2021 ◽  
Author(s):  
Prantik Dutta ◽  
Arun Gande ◽  
Gopi Ram
Keyword(s):  
Evolutionary Algorithm ◽  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Trial And Error ◽  
Swarm Optimization ◽  
Lumped Element ◽  
Trial And Error Method ◽  
Error Method ◽  
Maximum Directivity

In this letter, a non-reciprocal filter with enhanced directivity is analyzed methodically and the filter parameters are optimized using an evolutionary algorithm. The return loss, insertion loss, and isolation characteristics of the filter exhibit a trade-off that makes manual tuning a trial-and-error method. The veracity of the numerical modeling is conformed by designing a 150 MHz lumped element non-reciprocal bandpass filter based on the parameters extracted using an evolutionary algorithm based particle swarm optimization (PSO). The simulated and measured results comply well with the modeling and the results exhibit maximum directivity of 28.2 dB without degradation in insertion loss (1.1 dB) and return loss (16.2 dB) within the passband. The algorithm can be utilized in designing non-reciprocal filters having different center frequencies and bandwidths.

scholarly journals Rancang Bangun Mikrostrip Bandpass filter Pada Frekuensi 2,9 – 3,1 GHz Menggunakan Metode Open Stub

2018 ◽  
Vol 4 (1) ◽  
pp. 54-62
Author(s):  
Muhammad Iqbal ◽  
Nanang Ismail ◽  
Yuyu Wahyu
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter

Pada jurnal ini akan dibahas mengenai perancangan mikrostrip bandpass filter dengan metode open stub dengan melihat pada parameter yang sudah ditetapkan diantarnya adalah return loss, insertion loss dan VSWR. Penggunaan mikrostrip sendiri dipilih karena dapat menyiasati dimensi filter yang besar dan bandpass digunakan untuk meloloskan sinyal yang diinginkan. Hasil dari penggunaan metode open stub memiliki kelebihan dan kekurangan dibandingkan dengan menggunakan metode open stub yang dikombinasikan dengan metode lain. Hasil simulasi menunjukan nilai return loss -14,7126 dB, nilai insertion loss menunjukan -2,2722 dB dan nilai VSWR 1,4504 pada frekuensi 3 GHz. Pada hasil pengukuran menunjukan nilai return loss -10,649 dB, nilai insertion loss menunjukan -3,76 dB dan nilai VSWR 1,83 pada frekuensi 3 GHz. Hasil simulasi dan pengukuran terjadi perbedaan karena beberapa faktor yang tidak diperhitungkan saat simulasi sehingga terjadi perubahan nilai dari parameter filter. Dengan menggunakan jenis substrat yang berbeda dan ordo berbeda dapat menghasilkan nilai simulasi yang lebih baik dari substrat yang digunakan pada saat pabrikasi.

scholarly journals PERANCANGAN DAN REALISASI BANDPASS FILTER DENGAN METODE OPEN LOOP SQUARE RESONATOR UNTUK MICROWAVE LINK

2016 ◽  
Vol 7 (3) ◽  
Author(s):  
Naufal Rizki Rinditayoga ◽  
Dian Widi Astuti
Keyword(s):  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Vector Network Analyzer ◽  
Network Analyzer ◽  
Point To Point ◽  
Microwave Link

Dalam  dunia  telekomunikasi,  antena  parabola ini  dipakai  oleh  perangkat  yang dinamai  perangkat  transmisi  radio  microwave (gelombang  mikro) point  to  point.  Microwave link  sendiri  merupakan  sistem  komunikasi  yang  menggunakan  gelombang  radio  pada  rentang frekuensi gelombang mikro untuk mengirimkan video, audio, atau data antara dua lokasi yang terpisah, yang dapat digunakan hanya beberapa meter sampai dengan beberapa kilometer. Untuk mendukung    teknologi  tersebut,  tidak  lepas  dari  sebuah  yang  bernama  filter.  Filter  sendiri merupakan salah satu komponen penting dalam komunikasi wireless.Dasar  penelitian  ini  yaitu  bertujuan  untuk  membuat  sebuah  bandpass  filter  yang  dapat meloloskan frekuensi pada microwave link yaitu pada frekuensi 7,1 GHz – 7,7 GHz. Dari hasil pengukuran respon filter pada alat vector network analyzer didapatkan hasil yang berbeda antara spesifikasi,  simulasi  dan  fabrikasi.  Hasil  dari  penelitian  ini  Bandpass  filter  bekerja  pada frekuensi 7,1 – 7,7 GHz. Pada hasil simulasi menggunakan HFSS didapatkan nilai return loss (S11)  filter  sebesar  -27,48 dB  dan  insertion loss (S21)  sebesar  -0,43 dB. Sedangkan pada hasil pengukuran  menggunakan  VNA  didapatkan  nilai  return  loss  (S11)  filter  sebesar  -28,2  dB  dan insertion loss (S21) sebesar -0,53 dBKata  kunci  :  Bandpass  filter,    Open  Loop  Square  Resonator,  Microwave  link

Compact Ultra-Wide Upper Stopband Microstrip Dual-Band BPF Using Tapered and Octagonal Loop Resonators

Frequenz ◽  
2020 ◽  
Vol 74 (1-2) ◽  
pp. 61-71 ◽  
Author(s):  
Shiva Khani ◽  
Mohammad Danaie ◽  
Pejman Rezaei ◽  
Ali Shahzadi
Keyword(s):  
Design Process ◽  
Insertion Loss ◽  
Return Loss ◽  
Bandpass Filter ◽  
Analytical Description ◽  
Dual Band ◽  
Equivalent Circuits ◽  
Attenuation Level ◽  
S Matrix

AbstractIn this paper, a microstrip dual-band bandpass filter (DBBPF) based on an octagonal loop resonator (OLR), tapered resonators and open bended stubs (OBSs) is designed and analysed. The proposed structure produces two passbands with the centre frequencies of 3.65 and 5.67 GHz. The marked advantages of the proposed filter are as follows: Two centre frequencies can be individually tuned. The bandwidth of the upper passband can also be controlled. Furthermore, the DBBPF benefits from an ultra-wide upper stopband from 5.9 up to 21 GHz with an attenuation level of higher than 20 dB and a small size of 0.21 λg × 0.26 λg, where λg is the guided wavelength at 3.65 GHz. The designed filter is horizontally and vertically symmetrical leading to a reciprocal S matrix. Other remarkable specifications of the proposed filter are the insertion loss < 0.62 dB, the return loss > 20.2 dB and sharp response. To provide an analytical description, the LC equivalent circuits of initial and main resonators are presented. Acceptable similarity between simulated and measured results verifies the design process.

scholarly journals A Compact Dual-Mode Bandpass Filter with High Out-of-Band Suppression Using a Stub-Loaded Resonator Based on the GaAs IPD Process

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 712 ◽  
Author(s):  
Wei Zhang ◽  
Zhao Yao ◽  
Jie Zhang ◽  
Eun Seong Kim ◽  
Nam Young Kim
Keyword(s):  
Insertion Loss ◽  
High Performance ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Fabrication Process ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Semiconductor Fabrication ◽  
Device Size

In this letter, a compact dual-mode bandpass filter (BPF) with an ultra-wide stopband that employs two folded open-loop resonators (FOLRs) and stub-loaded resonators (SLRs) is proposed. The dual-mode resonators are optimized by loading two SLRs onto the folded open-loop resonators, and this process is analyzed using the dual-mode theory. To miniaturize the device size and increase chip performance, the proposed BPF is fabricated by a III–V compound semiconductor-fabrication process using a high-performance GaAs substrate based on the integration passivation device (IPD) fabrication process. A compact dual-mode BPF with low insertion loss and high return loss is designed and fabricated. Two extra transmission zeros (TZs) located in the high-frequency range increase the wide stopband, and the two TZs near the passband result in a higher selectivity. A resonant frequency centered at 7.45 GHz with an insertion loss of −1.21 dB and a measured return loss of higher than −23.53 dB and 3 dB fractional bandwidths of 5.8% are achieved. The stopband can be suppressed up to 20 GHz owing to the two tunable TZs resulting in higher selectivity and wideband rejection. The size of the filter was drastically optimized using a simplified architecture of two FOLRs and SLRs.

A Step-by-Step Approach to Bandpass/Channel Filter Design

2021 ◽  
Vol 10 (2) ◽  
pp. 1-14
Author(s):  
Augustine O. Nwajana
Keyword(s):  
Return Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Reference Source ◽  
Fractional Bandwidth ◽  
Microstrip Technology ◽  
Centre Frequency ◽  
Device Size ◽  
Channel Filter ◽  
Good Agreement

This paper presents a step-by-step approach to the design of bandpass/channel filters. The chapter serves as a reference source to microwave stakeholders with little or no filter design experience. It should help them design and implement their first filter device using the microstrip technology. A 3-pole Chebyshev bandpass filter (BPF) with centre frequency of 2.6 GHz, fractional bandwidth of 3%, passband ripple of 0.04321 dB, and return loss of 20 dB has been designed, implemented, and simulated. The designed filter implementation is based on the Rogers RT/Duroid 6010LM substrate with a 10.7 dielectric constant and 1.27 mm thickness. The circuit model and microstrip layout results of the BPF are presented and show good agreement. The microstrip layout simulation results show that a less than 1.8 dB minimum insertion loss and a greater than 25 dB in-band return loss were achieved. The overall device size of the BPF is 18.0 mm by 10.7 mm, which is equivalent to 0.16λg x 0.09λg, where λg is the guided wavelength of the 50 Ohm microstrip line at the filter centre frequency.

A CRLH TL Transmission Line Structure and its Application to Bandpass Filter Design

2013 ◽  
Vol 446-447 ◽  
pp. 865-868
Author(s):  
Ya Lin Guan ◽  
Xin Kun Tang ◽  
Shi Lei Zhou
Keyword(s):  
Transmission Line ◽  
Insertion Loss ◽  
Bandpass Filter ◽  
Filter Design ◽  
Left Handed ◽  
Relative Bandwidth ◽  
Low Pass ◽  
Band Pass ◽  
Low Insertion Loss ◽  
High Pass

In this paper, a novel bandpass filter (BPF) using the composite right/left-handed transmission line (CRLH-TL) theory is presented.The composite right/left-handed TL with the high-pass characters of left-handed transmission line (LH-TL) and the low-pass characters of right-handed transmission line (RH-TL) are used to construct the bandpass filter.Using this theory,we design a bandpass filter which have an obvious band pass response with a wide passband range from 5.1to 12.9GHz and a low insertion loss of less than 3.1dB. The relative bandwidth is close to 110%. Simulation using ADS demonstrated the viability of the approach.

Sign in / Sign up

Export Citation Format

Share Document